WO2024251959A1 - Système et procédé de commande d'un système de stockage d'énergie à eau chaude - Google Patents

Système et procédé de commande d'un système de stockage d'énergie à eau chaude Download PDF

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Publication number
WO2024251959A1
WO2024251959A1 PCT/EP2024/065758 EP2024065758W WO2024251959A1 WO 2024251959 A1 WO2024251959 A1 WO 2024251959A1 EP 2024065758 W EP2024065758 W EP 2024065758W WO 2024251959 A1 WO2024251959 A1 WO 2024251959A1
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WO
WIPO (PCT)
Prior art keywords
electrical
current
output
power
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2024/065758
Other languages
English (en)
Inventor
Laurens Daniël Van Vliet
Martin Mohana
Pavol Bodis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newton Energy Solutions Holding BV
Original Assignee
Newton Energy Solutions Holding BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newton Energy Solutions Holding BV filed Critical Newton Energy Solutions Holding BV
Priority to EP24732240.7A priority Critical patent/EP4724744A1/fr
Publication of WO2024251959A1 publication Critical patent/WO2024251959A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/12—Arrangements for adjusting voltage in AC networks by changing a characteristic of the network load
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
    • H05B1/0283—For heating of fluids, e.g. water heaters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2105/00—Networks for supplying or distributing electric power characterised by their spatial reach or by the load
    • H02J2105/50—Networks for supplying or distributing electric power characterised by their spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2105/52—Networks for supplying or distributing electric power characterised by their spatial reach or by the load for selectively controlling the operation of the loads for limitation of the power consumption in the networks or in one section of the networks, e.g. load shedding or peak shaving
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2105/00—Networks for supplying or distributing electric power characterised by their spatial reach or by the load
    • H02J2105/50—Networks for supplying or distributing electric power characterised by their spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2105/52—Networks for supplying or distributing electric power characterised by their spatial reach or by the load for selectively controlling the operation of the loads for limitation of the power consumption in the networks or in one section of the networks, e.g. load shedding or peak shaving
    • H02J2105/53—Networks for supplying or distributing electric power characterised by their spatial reach or by the load for selectively controlling the operation of the loads for limitation of the power consumption in the networks or in one section of the networks, e.g. load shedding or peak shaving for partial power limitation, e.g. entering degraded or current limitation modes

Definitions

  • the present invention relates to a method of controlling a hot water energy storage system comprising an electrical heater for heating a volume of water.
  • the present invention further relates to a system for controlling such a hot water energy storage system.
  • renewable energy sources such as solar, wind and hydro-powered sources are typically fluctuating energy sources.
  • the irregular energy production of renewable energy sources brings with it the issue of managing the balance between the supply and the demand at the local level and at the network level.
  • a well-known challenge in the field is thus, in times of overproduction, the prolonged energy storage of the produced energy with a minimal energy loss.
  • electrical battery systems such as lithium-ion battery energy storage systems, and power conversion into chemicals (Power-to-X) or into heat (Power-to-Heat) are being investigated.
  • Storage options based on conversion to heat use typically sensible heat storage, wherein heat is stored in a fluid contained in a reservoir.
  • sensible heat storage heat is stored in a medium using the intrinsic heat capacity (C P ) of the medium.
  • C P intrinsic heat capacity
  • the medium in sensible heat storage typically does not undergo a chemical and/or phase change.
  • Sensible heat storage has the advantage over thermochemical heat storage and latent heat storage that it allows for relatively simple systems as no multiphase physics, complex kinetics etc. are involved.
  • One method for storing sensible heat is in the form of hot water tanks.
  • the water in the tank may be heated by an electrical heater and the energy can be stored for multiple days, typically up to five days in domestic hot water tanks.
  • This enables the water to be heated whenever the real-time electricity prices are low due to, e.g., a renewable power generation surplus, such that the stored hot water can be cheaply consumed irrespective of the electricity prices.
  • the electrical heater for heating the stored water is conventionally connected to a dedicated electrical circuit of a distribution board, i.e., an electrical group to which only the electrical heater is connected, wherein an electrical group is defined as the (domestic) electrical subsystem that is arranged after a circuit breaker protecting that electrical group. That is, an electrician would consider it self-evident to dedicate an electrical circuit entirely to the electrical heater to prevent that a simultaneous activation of both the electrical heater and another device would cause the respective circuit breaker to trip. Therefore, an additional electrical group is typically to be added when retrofitting such a hot water energy storage system in an existing system, but this may not always be possible in practice nor desirable in terms of costs. This raises the threshold for adopting hot water energy storage systems domestically in terms of costs and/or technical feasibility.
  • a method of controlling a hot water energy storage system comprising an electrical heater for heating a volume of water, wherein the method comprises the steps of: providing an electrical system comprising an electrical circuit and at least one load device, the electrical circuit being connected to an external electrical network such as a mains and to the at least one load device, wherein the electrical circuit comprises a main power input/output for connection to the external electrical network and a first power output for powering the at least one load device, and wherein the electrical circuit is provided with an overcurrent protection device, such as a circuit breaker, arranged between the power input/output and the first power output, wherein the overcurrent protection device is arranged to interrupt the current flowing though it when said current exceeds a predefined maximum current threshold; providing the electrical heater in parallel to the at least one load device on the first power output; monitoring the current at the first power output of the electrical circuit; determining, based on the monitored output current and the predefined maximum current threshold, an unused current amount representative for an amount of current still allowable at the first power
  • the electrical heater can be connected to a nondedicated electrical group, i.e. to an already existing electrical group powering an existing load device, such that an additional electrical group does not have to be added necessarily when installing the hot water energy storage system.
  • An electrical group is defined as a sub circuit with a dedicated circuit breaker for protecting any load of said sub circuit located downstream of said circuit breaker. Consequently, the installation of such a hot water energy storage system can be facilitated.
  • the hot water energy storage system may comprise a water tank, wherein the electrical heater is arranged to heat a volume of water in the water tank.
  • the electrical heater may typically comprise an electrical heating resistance.
  • the at least one load (device) of the electrical system may be any electrical power consuming device, such as for example a washing machine, an oven, a dishwasher, etc.
  • the electrical system may receive AC power from the main power input/output.
  • the main power input/output may be connected to the grid or to another AC source.
  • the power consumption at the main power input/output may vary over time in dependence of the power use of the devices (whether load devices or source devices) connected to the electrical circuit.
  • the electrical system may typically be divided into a plurality of electrical subsystems, also called groups. Each group may be provided with a dedicated circuit breaker and may be associated with at least one device.
  • the electrical system comprises at least one load device powered from one power output of the electrical circuit.
  • the water boiler may be connected to an existing group powering an existing load.
  • the electrical heater may be connected directly in parallel with the existing load at the power output associated with said load.
  • at least one load and the electrical heater may be connected in parallel on the power output of a single group, both load and electrical heater being associated with a single circuit breaker.
  • a skilled person may further envisage placing further loads in parallel on that group.
  • the real time electrical current within the electrical group holding the hot water energy storage system may then be monitored. More specifically, according to a preferred embodiment of the method, the real time current within the electrical group comprising the electrical heater may be sensed by a sensor, preferably a current clamp, installed around a cable of the electrical circuit in the vicinity of the circuit breaker of the group. In this manner, the current measurement can advantageously take place at the electrical cabinet, i.e., close to the distribution board where the circuit breaker is installed.
  • a sensor preferably a current clamp
  • the current at the power output may be calculated, estimated or extrapolated, for instance based on the current in the electrical heater and the current in the at least one load.
  • a skilled person can envisage different solutions for monitoring the current flowing through the overcurrent protection devices without inventive step, by varying the type, number and locations of the sensors within the system.
  • the actual electrical current is compared to the maximum (or nominal) current that may flow through the circuit breaker, to determine an unused current amount of the group associated with that circuit breaker.
  • the electrical heater can then be controlled to use no more than the unused current amount for heating the water. In this way, the operation of the electrical heater may be transparent for the other loads on the same power output, since the electrical heater under normal operation would not trigger the protection device.
  • the predefined maximum current threshold may be defined such that a nominal current of the circuit breaker can be briefly exceeded, i.e., for a period of up to 30 seconds. That is, the overcurrent protection device may be a time-delay circuit breaker which allows a certain period and amount of overcurrent before it interrupts the current therethrough. By adapting the sampling time of the monitoring and the dynamic of the determining and controlling steps, to the time/current behavior of the overcurrent protection device, it can be made sure that under normal operation, the protection device is not triggered by the operation of the electrical heater.
  • the circuit breaker may be a thermal magnetic circuit breaker.
  • the circuit breaker has tripping characteristic B.
  • Such circuit breakers are commonly used in socket outlets and lighting circuits.
  • the circuit breaker trips about instantaneously when the current is approximately 3 to 5 times the rated current.
  • the circuit breaker trips once the current is about 1.5 times the rated current for an uninterrupted period of between 1 and 10 minutes.
  • the circuit breaker does not trip while the current is up to about 1.13 times the rated current.
  • Thermal energy storage can be used for balancing local energy supply and demand, in particular for peak shaving of typically intermittent renewable power generators such as photovoltaic panels.
  • the water in the tank may then be heated whenever an on-site renewable power generation system generates a surplus of electrical power, and optionally depending on the actual energy pricing.
  • the method further comprises the steps of: providing an on-site electrical power generation system for generating electrical power, such as a photovoltaic system comprising at least one solar panel and a power converter (inverter for converting De power into Ac power), wherein the electrical circuit further comprises an additional power input for connection to the on-site electrical power generation system and wherein the electrical circuit is further configured for supplying the generated electrical power from the additional power input to the main power input/output and/or to the first power output, preferably through an additional overcurrent protection device; monitoring the electrical power at the main power input/output; adapting the control of the electrical heater on the basis of the monitored electrical power at the main power input/output.
  • an on-site electrical power generation system for generating electrical power
  • the electrical circuit further comprises an additional power input for connection to the on-site electrical power generation system and wherein the electrical circuit is further configured for supplying the generated electrical power from the additional power input to the main power input/output and/or to the first power output, preferably through an additional overcurrent protection device
  • the local energy system (comprising the electrical system, the hot water energy storage system and the on-site electrical power generation system) may be connected to a public energy grid for taking electrical energy from, and supplying electrical energy to, said public energy grid.
  • the electrical heater is preferably controlled to use no more than the surplus amount of the electrical power for heating the water. This way, it can be ensured that the hot water energy storage system functions as a local preferred buffer for the on-site power generator by only using power when there is a surplus of power generated locally, instead of being a load for which power is to be taken from the public grid.
  • the electrical battery storage system When controlling the electrical battery storage system, its charge or discharge rate is controlled, preferably also on the basis of a state of charge of the electrical battery storage system.
  • the state of charge of the hot water energy storage system may also be taken into account for the control of the electrical battery storage system.
  • the state of charge of the electrical battery storage system may for example be controlled according to weighted priorities between the available current, and the states of charge of both the hot water energy storage system and the electrical battery energy storage system.
  • the electrical battery storage system may be connected to the same electrical circuit as the hot water energy storage system or to another electrical circuit of the electrical system.
  • the electrical battery storage system may comprise, e.g., a lithium-ion battery home energy storage system.
  • the controller is configured to control the electrical battery storage system and the electrical heater such that the electrical battery storage system is fully charged before powering the electrical heater or, alternatively, such that the power use of the electrical heater reaches its maximum before charging the electrical battery storage system.
  • the same method of control may be applied to an electrical battery storage system used on its own and connected in the same way as the hot water energy storage system into an existing system, in which case when electrical power can be supplied to the public grid due to a surplus of generated renewable power, the electrical battery storage system is preferably controlled to use no more than the surplus amount of the electrical power for storing energy.
  • the same method of power control of an auxiliary energy storage system connected in parallel to an existing load in an existing electrical system may be used as long as the same concept of an intelligent control to store energy into the auxiliary energy storage up to an amount allowed by the circuit breaker associated to that load, is concerned. Any type of energy storage system may benefit from that control method for retrofit purposes.
  • Io is positive when the current at the main power input/output flows from the external electrical network to the electrical system, i.e. when the external electrical network operates as a source delivering power to the electrical system.
  • Io is negative when the current at the main power input/output flows towards the external electrical network, i.e. when the electrical system operates as a source delivering power to the external electrical network.
  • the flow of power at the main power input/output can be easily monitored.
  • the flow of power could also be deduced, calculated, extrapolated from other sensed variables within the system, like for instance the current in each group of the electrical circuit.
  • a control system for controlling a hot water energy storage system comprising an electrical heater for heating a volume of water
  • an electrical system comprising an electrical circuit and at least one load device, the electrical circuit being connected to an external electrical network such as a mains and to the at least one load device, wherein the electrical circuit comprises a main power input/output for connection to the external electrical network and a first power output for powering the at least one load device, and wherein the electrical circuit is provided with an overcurrent protection device, such as a circuit breaker, arranged between the power-input/output and the first power output, wherein the overcurrent protection device is arranged to interrupt the current flowing though it when said current exceeds a predefined maximum current threshold, wherein the electrical heater is connected in parallel to the at least one load device on the first power output; wherein the control system comprises: a first monitoring device for monitoring the current at the first power output of the electrical circuit; a
  • each group is defined by its own circuit breaker, without the need to add an additional group, and thus an additional circuit breaker, as the system ensures that the current passing through the respective circuit breaker, to which the hot water storage system is connected, does not exceed the maximum allowable current.
  • the first monitoring device is a current sensor, preferably a clamp, for sensing the current at the first power output flowing through the overcurrent protection device.
  • the current may be easily monitored.
  • the current may be obtained indirectly from other measured, estimated, extrapolated data from the system.
  • the processor comprises a comparator for comparing the current sensed at the first power output with the predefined maximum current threshold. Via a comparator, the unused current amount may easily be determined.
  • the controller is configured for regulating the current to the electrical heater to remain under the determined unused current amount, preferably the controller is configured for setting a target current of the electrical heater based on the determined unused current amount. In this way, the addition of the electrical heater may remain transparent to the rest of the system.
  • the electrical system further comprises an on-site electrical power generation system for generating electrical power, such as a photovoltaic system comprising solar panels, wherein the electrical circuit further comprises an additional power input for connection to the on-site electrical power generation system and wherein the electrical circuit is further configured for supplying the generated electrical power from the additional power input to the main power input/output and/or to the first power output; wherein the control system further comprises a second monitoring device for monitoring the electrical power supplied at the main power input/output; wherein the processor is further configured for adapting the control of the electrical heater on the basis of the monitored electrical power at the main power input/output.
  • an on-site electrical power generation system for generating electrical power, such as a photovoltaic system comprising solar panels
  • the electrical circuit further comprises an additional power input for connection to the on-site electrical power generation system and wherein the electrical circuit is further configured for supplying the generated electrical power from the additional power input to the main power input/output and/or to the first power output
  • the control system further comprises a second monitoring device for
  • the electrical heater may be indeed preferably controlled to use no more than the surplus amount of the electrical power for heating the water. This way, it can be ensured that the hot water energy storage system functions as a local preferred buffer for the on-site power generator by only using power when there is a surplus of power generated locally, instead of being a load for which power is to be taken from the public grid. The power consumption from the external network and thus the associated costs can thus be mitigated.
  • a method of installing a hot water energy storage system comprising an electrical heater (10) for heating a volume of water in an existing electrical system.
  • the existing electrical system comprises an existing electrical circuit and at least one existing load device, the existing electrical circuit being connected to an external electrical network such as a mains and to the at least one existing load device, wherein the existing electrical circuit comprises a main power input/output for connection to the external electrical network and a first power output for powering the at least one existing load device, and wherein the existing electrical circuit is provided with an existing overcurrent protection device, such as a circuit breaker, arranged between the power-input/output and the first power output, wherein the existing overcurrent protection device is arranged to interrupt the current flowing though it when said current exceeds a predefined maximum current threshold.
  • the method of installing comprises the steps of: connecting the electrical heater in parallel to the at least one existing load device on the first power output of the existing electrical circuit; installing a control system according to any of the above control system claims.
  • the electrical heater may be physically installed in the vicinity of the at least one load device, while the control system may be physically installed in the vicinity of the overcurrent protection device.
  • the electrical heater is associated with a tank of water and requires typically a rather consequent amount of installation space, like an attic, a garage, a utility room, and may typically be physical arranged close to a washing machine having similar space requirements.
  • the power output cables may not be easily accessible (cabling in the walls) but an easy connection to the power output may well be available (plug in the wall).
  • the overcurrent protection device is typically located in an electrical cabinet at the entrance of the premises with cables leaving said electrical cabinet which are typically easily accessible and identifiable for each group.
  • Figure 1 schematically represents an electrical system 100 comprising a first electrical circuit 101, a second electrical circuit 102 and a third electrical circuit 103.
  • Each electrical circuit 101, 102, 103 is provided with a double pole circuit breaker 111, 112, 113 and comprises a current carrying conductor Li, Lz, L3 that carries current from the respective circuit breaker 111, 112, 113 to electric loads connected to that circuit, and a current returning conductor Ni, N2, N3 that returns current to the circuit breaker 111, 112, 113.
  • the circuit breakers 111, 112, 113 are connected to an AC source, for instance the public grid, via main conductors Lo and No (defining a main input/output) and a kilowatt-hour meter 104, for instance a smart meter. Each circuit breaker 111, 112, 113 interrupts the current therethrough when the current exceeds a respective predefined maximum current threshold.
  • a hot water energy storage system 10 that includes a water tank and an electrical (variable-power) heater for heating a volume of water in the tank is connected to the first electrical circuit 101.
  • washing machine 11 is connected to the first electrical circuit 101.
  • the conductors Li and Ni define the power output of the first electrical circuit 101, to which the hot water energy storage system 10 and the washing machine 11 are connected in parallel.
  • a photovoltaic system comprising a photovoltaic module 20 and an inverter 21, is connected to the second electrical circuit 102 via the inverter 21 for supplying generated electrical power to the grid by means of the main conductors L2 and N2.
  • One or more other loads are similarly connected to the third electrical circuit 103.
  • the various loads 10, 11, 30 and the photovoltaic system 20, 21 are provided with a protective earthing PE.
  • a first current sensor, typically a clamp, 1 is installed around the current carrying conductor Li of the first electrical circuit 101 and is configured to measure the current Ii through the first current carrying conductor Li.
  • a second current sensor 2 typically a clamp, is installed around the main current carrying conductor Lo and is configured to measure the current Io through the main current carrying conductor Lo, i.e., from the grid to the electrical circuits 101, 102, 103.
  • the sensors 1, 2 are connected to a processing and control module 3 in communication with the hot water storage system 10 via a (optionally wireless) connection 4.
  • the smart meter 104 may be connected to the processing and control module 3 and configured to measure the current Io through the main current carrying conductor Lo such that the second clamp 2 can be omitted.
  • the smart meter 104 then functions as the second current sensor.
  • connection 4 may use power-line communication (PLC).
  • PLC power-line communication
  • data may be communicated via the conductors of the electrical system 100, ie the communication may be performed over the existing electrical wires within the building in which the electrical system 100 is arranged.
  • the processing and control module 3 is configured to calculate, based on the predefined maximum current of the first circuit breaker 111 and the measured current through the first current carrying conductor Li, an unused current amount representing an amount of current that still can be potentially consumed (consumable) at the first power output without exceeding the predefined maximum current threshold of the first circuit breaker 111.
  • the unused current amount may be calculated using the following equation wherein I u (t) denotes the unused current amount at an instant t, I ma x denotes the predefined maximum current, and F (t) denotes the current through the first current carrying conductor Li at an instant t : u ( ⁇ max II (
  • the processing and control module 3 is further configured to calculate, based on the measured current Io through the main current carrying conductor Lo a surplus amount of electrical current. That is, when the photovoltaic system 20, 21 generates and supplies more current to the electrical system 100 than used by the loads 10, 11, 30, the current through the main current carrying conductor Lo would be negative. In other words, a surplus amount of electrical current may be monitored by detecting when the current Io through the main conductor flows from the electrical circuit 100 towards the external network connected to the main input/output Lo and No, i.e. in the example of a domestic installation connected to a grid, towards the grid upstream of the kilowatt- hour meter 104.
  • the current through the electrical heater may be controlled (open loop or closed loop regulation) to follow a target.
  • the surplus amount of current I s and the unused current amount I u may thus be used as thresholds for determining the maximum heating power (current) of the boiler.
  • the processor and the controller may be incorporated in a single element or in separate elements, which need not be collocated.
  • the processor and/or controller may each be housed either in the vicinity of the electrical heater or in the vicinity of the protection device, depending on circumstances.
  • all the surplus current may be transferred to the water heater rather than the external network.
  • a different strategy may be selected to rather prioritize redistribution to the external network if financially more interesting.
  • a weighted system between redistribution to the external network, and local use by the water heater may be envisaged taking into account real time electricity pricing information.
  • the sensors 1, 2, the processing and control module 3, the meter 104 and the circuit breakers 111, 112, 113 may be conveniently arranged in a single electrical cabinet.
  • an electrical battery storage system may be connected to the first electrical circuit 101 in the same way as the hot water energy storage system 10 in which case the electrical battery storage system may be as well controlled on the basis of the determined unused current amount. For instance, when electrical power can be supplied to the public grid due to a surplus of generated renewable power, the electrical battery storage system 10 may be controlled on the basis of the determined unused current amount to charge the electrical battery storage up to an amount of current still allowable at the first power output without exceeding the predefined maximum current threshold.
  • the amount of current consumed or generated by each storage system should further be taken into account when deciding how to control each storage systems. For instance when an electrical battery system may be delivering power (to the hot water storage system), the amount of current delivered by the electrical battery system may be taken into account in the control equations of the hot water storage system, since this added current would be transparent to the first circuit breaker 111. For that purpose an additional sensor sensing the current flowing to/from the electrical battery storage system may be used.
  • An electrical battery storage system may indeed (contrary to a hot water storage system) operate electrically in the electrical circuit 101 both as a source or as a load.
  • control of the current through the electrical heater may thus be adapted according to other equations/control schemes as long as the concept of keeping the current flowing through the first circuit breaker 111 under its predefined maximum current I ma x is kept.
  • the electrical battery storage system and/or the hot water energy storage system 10 can be similarly installed as described above in a three-phase electrical system.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un procédé de commande d'un système de stockage d'énergie à eau chaude comprenant un dispositif de chauffage électrique pour chauffer un volume d'eau, le procédé comprenant les étapes de : - fourniture d'un système électrique comprenant un circuit électrique et au moins un dispositif de charge, le circuit électrique étant connecté à un réseau électrique externe tel qu'un réseau public et au ou aux dispositifs de charge, le circuit électrique comprenant une entrée/sortie de puissance principale pour connexion au réseau électrique externe et une première sortie de puissance pour alimenter le ou les dispositifs de charge, et le circuit électrique étant pourvu d'un dispositif de protection contre les surintensités, tel qu'un disjoncteur, disposé entre l'entrée/sortie de puissance et la première sortie de puissance, le dispositif de protection contre les surintensités étant agencé pour interrompre la circulation de courant à travers celui-ci lorsque ledit courant dépasse un seuil de courant maximal prédéfini ; - fourniture du dispositif de chauffage électrique en parallèle au ou aux dispositifs de charge sur la première sortie de puissance ; - surveillance du courant à la première sortie de puissance du circuit électrique ; - détermination, sur la base du courant de sortie surveillé et du seuil de courant maximal prédéfini, d'une quantité de courant inutilisé représentative d'une quantité de courant toujours admissible à la première sortie de puissance sans dépasser le seuil de courant maximal prédéfini ; et - commande du dispositif de chauffage électrique sur la base de la quantité de courant inutilisé déterminée. L'invention concerne en outre un système de commande associé et un procédé d'installation d'un système de stockage d'énergie à eau chaude dans un système existant.
PCT/EP2024/065758 2023-06-08 2024-06-07 Système et procédé de commande d'un système de stockage d'énergie à eau chaude Ceased WO2024251959A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24732240.7A EP4724744A1 (fr) 2023-06-08 2024-06-07 Système et procédé de commande d'un système de stockage d'énergie à eau chaude

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NL2035048A NL2035048B1 (en) 2023-06-08 2023-06-08 System and method of controlling a hot water energy storage system

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DE102013109608A1 (de) * 2013-09-03 2015-03-05 Sma Solar Technology Ag Verfahren zum und Einspeisesteuerung für das Einspeisen von elektrischer Leistung in einen Leitungszweig
WO2015172183A1 (fr) * 2014-05-15 2015-11-19 Gng Electrical Pty Ltd Commande de charge de génération
WO2016123463A2 (fr) * 2015-01-29 2016-08-04 Koolbridge Solar, Inc. Appareils intelligents, comprenant des sorties électriques adressables
EP3845824A1 (fr) * 2019-12-30 2021-07-07 LG Electronics Inc. Chauffe-eau commandé par régulation de fréquence d'onduleur et procédé de commande d'un chauffe-eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013109608A1 (de) * 2013-09-03 2015-03-05 Sma Solar Technology Ag Verfahren zum und Einspeisesteuerung für das Einspeisen von elektrischer Leistung in einen Leitungszweig
WO2015172183A1 (fr) * 2014-05-15 2015-11-19 Gng Electrical Pty Ltd Commande de charge de génération
WO2016123463A2 (fr) * 2015-01-29 2016-08-04 Koolbridge Solar, Inc. Appareils intelligents, comprenant des sorties électriques adressables
EP3845824A1 (fr) * 2019-12-30 2021-07-07 LG Electronics Inc. Chauffe-eau commandé par régulation de fréquence d'onduleur et procédé de commande d'un chauffe-eau

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