WO2023215340A2 - Dispositifs, systèmes et procédés de commande de tension d'entrée d'équipement distant - Google Patents

Dispositifs, systèmes et procédés de commande de tension d'entrée d'équipement distant Download PDF

Info

Publication number
WO2023215340A2
WO2023215340A2 PCT/US2023/020765 US2023020765W WO2023215340A2 WO 2023215340 A2 WO2023215340 A2 WO 2023215340A2 US 2023020765 W US2023020765 W US 2023020765W WO 2023215340 A2 WO2023215340 A2 WO 2023215340A2
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
rvs
remote equipment
output
load
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/US2023/020765
Other languages
English (en)
Other versions
WO2023215340A3 (fr
Inventor
Nicola Cinagrossi
Urs Wild
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.)
Green Cubes Technology LLC
Original Assignee
Green Cubes Technology LLC
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 Green Cubes Technology LLC filed Critical Green Cubes Technology LLC
Publication of WO2023215340A2 publication Critical patent/WO2023215340A2/fr
Publication of WO2023215340A3 publication Critical patent/WO2023215340A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
    • 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
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks
    • H02J1/06—Two-wire DC power distribution systems

Definitions

  • Electrically powered equipment is usually placed near its electrical source to avoid power transmission losses.
  • the baseband unit including the power source
  • the radio equipment is necessarily placed at the top of the tower for a better connection.
  • Other examples where power is supplied from a source to remotely located equipment include data centers, distribution antenna systems (DAS), crypto currency mining systems, traditional mining equipment, and in the oil and gas industry. This list is non-exhuastive and there are many applications where a power unit provides power to remotely located equipment.
  • Transferring power from a power supply unit to remote equipment also known as a Remote Load Unit (RLU)
  • RLU Remote Load Unit
  • the distance between the power source and the RLU increases the power loss and causes insufficient voltage levels at the equipment end.
  • the RLU might suffer from power interruptions, power surges, and hardware or software failures.
  • the present invention introduces several methods and devices to control the input voltage of the remote equipment in order to alleviate power interruptions by providing a regulated voltage suitable for the operation of the RLU, thus compensating for the power transmission loss, reducing service providers’ losses, and reducing the operational costs.
  • the disclosed methods and devices are able to meet load demands without the negative aspects as noted above.
  • a system and method for voltage regulation comprises a voltage source of a circuit that outputs an adjusted (increased or decreased) voltage, wherein the increased output voltage is sufficient to compensate for a voltage drop caused by the resistance of the wiring in the circuit such that the voltage reaching a load in the circuit is the voltage of a desired set point.
  • the systems and methods can include continuous monitoring of currents and voltages, wherein the output voltage is automatically or manually changed as the voltage reaching the remote equipment changes.
  • the output voltage is increased by an amount determined according to a linear curve between pre-set voltage values.
  • the output voltage is increased by an amount determined according to a linear curve between two pre-set voltage values.
  • the two pre-set voltage values correspond to no-load and a full-load.
  • the preset voltage values can be used as parametric inputs of the regulated voltage source (RVS) to calibrate the equipment in the field installation.
  • a system for voltage regulation comprises a voltage regulator or control system that instructs a voltage source of a circuit to adjust output voltage, such that the adjusted output voltage compensates for a voltage drop caused by the resistance of the wiring in the circuit.
  • a system and method for voltage regulation comprises a continuous voltage variation imposed on a voltage source, wherein the voltage source is connected to a remote load unit, and a voltage regulator or control system that adjusts the output voltage of the voltage source based on an estimated value of voltage at the load, wherein the estimated voltage at the load is determined from the continuous voltage variation, such that sufficient voltage to meet a specific desired voltage value of the remote load unit is delivered.
  • a system and method for voltage regulation the imposed voltage variation is arbitrary and continuous. In a further embodiment of the present invention, a system and method for voltage regulation the imposed voltage variation is a continuous variation between two defined voltages.
  • a rapid adjustment of the cable voltage is controlled by multiplying the cable drop by a number generated by dividing the measured value of the output current by a filtered value (low pass filter) of the output current.
  • measuring voltage, measuring current, estimating voltage at the load and imposing a variation on the voltage are performed by the regulated voltage source.
  • Fig. 1 shows a schematic of a regulated voltage source circuit that controls the voltage level in a remote equipment.
  • Fig. 2 shows a graph of regulated voltage source voltage setting based on two preset values.
  • Fig. 3 shows a schematic of a regulated voltage source circuit that controls the voltage level in a remote equipment by imposing an arbitrary continuous variation on the output voltage.
  • Fig. 4 shows a schematic of a regulated voltage source circuit that controls the voltage level in a remote equipment by imposing a two level variation on the output voltage.
  • Fig. 5 shows a graph of two level variation imposed on the output voltage.
  • Fig. 6 shows a diagram of the control system of the voltage regulation circuit of regulated voltage source.
  • the present disclosure includes methods to control the input voltage of remote equipment or remote load unit to provide a regulated voltage suitable for the operation of the RLU to alleviate the power interruptions and reduce transmission losses in the applications associated with remote equipment or remote load.
  • the disclosed methods are able to determine or estimate the cable voltage drop without knowing the cable gauge and cable length, or transmitting a signal over the cable to determine the cable resistance.
  • the load is the RLU which is located at a remote location (e.g. the top of a communication tower).
  • the power reaches the RLU from the regulated voltage source unit (RVS) by long copper cables, and the voltage drop across these cables equals the total resistance of the cable multiplied by the current flowing through it.
  • the voltage in Fig.1 at the RLU is equal to input voltage minus the voltage drop across the wiring which is the cables. This voltage drop affects the RLU operation in a negative way for both consumers and service providers.
  • the following methods can be used to control the input voltage of the remote equipment thereby alleviating problems caused by long distance transmission.
  • a first method for controlling the input voltage of a remote equipment is characterized as illustrated in FIG.
  • the regulated voltage source (RVS) 100 consists of a DC voltage source 101 supplying power to the load 103 (RLU) and two measurement points at the output (voltage measurement 104 and current measurement 105) to measure the RVS output.
  • the RVS 100 compensates for the voltage drop in the wiring resistance 102 as shown in Fig. 1.
  • the regulated voltage source 100 provides an output voltage value according to a linear curve between two pre-set voltage values which correspond to no- load 106 (VoSetl) and full-load 107 (VoSet ) voltage levels as shown in Fig. 2.
  • the values for no-load 106 (VoSetl) and full-load 107 (VoSetl) may be entered by a user. Values for VoSetl and VoSet2 may be determined experimentally.
  • the values are defined so that the resulting remote load voltage remains constant.
  • Another embodiment of the current invention is performed by imposing an arbitrary continuous variation on the output of the DC voltage source 205 of the regulated voltage source unit 200.
  • the voltage source 201 for the arbitrary and continuous variation may be an AC voltage source and is added to the DC voltage source.
  • the resulting voltage 104 (Vo) and current 105 (Io) measurement data can be used to estimate the voltage 203 (Vload) at the load 103 as explained in detail below.
  • a closed-loop control system 206 can then be used to adjust the RVS voltage setting by comparing the estimated voltage at the load with the target voltage, VoSet (204), as shown in Fig 3.
  • the arbitrary continuous voltage variation imposed by the voltage source 201 can be selected to be small relative to the voltage at the load and then superimposed on the DC voltage source 205 without introducing significant changes in RLU performance.
  • the output voltage 104 with the current 105 measurement data are used to estimate the voltage 203 at the load 103 and a closed feedback loop 206 regulates the estimated voltage by adjusting the voltage of the RVS 200 (Fig. 3) to meet the desired voltage.
  • the DC voltage source is adjusted depending on the output of the closed feedback loop 206.
  • the embodiment may use a proportional-integral controller (PI) 202 that defines the (frequency dependent) response based on input (VoSet - Vload calculated) given. This is to ensure a stable control loop. The arbitrary and continuous variation can be maintained on the DC voltage source so any changes in load can be quickly compensated for.
  • PI proportional-integral controller
  • Another embodiment of the current invention is to impose a continuous variation between two defined voltages.
  • a continuous two level variation 301 is added to the RVS 300 to estimate the voltage at the load 103 to compensate for the wiring loss 102.
  • These two voltages can be generated by injecting a square waveform, a trapezoidal waveform, or any other suitable periodic waveform.
  • the currents associated with these two voltages are measured, and the voltages along with the two resulting currents are used to derive the average voltage at the point of the load.
  • a voltage regulator is implemented to control the output of the power supply in order for the voltage received at the RLU to meet a specific set voltage value. Any changes in load demand can be compensated for by maintaining the continuous two level variation 301 and determining the compensation needed as described below.
  • the measurement voltages and currents Vol (302), Vo2 (303), lol (305) and Io2 (304) signals are sampled and pre-filtered.
  • the pre-filtered Vol (302), Vo2 (303), lol (305) and Io2 (304) values can be used to calculate the average voltage at the load (Vload) 306 with the formula:
  • the rate of change of the load 103 power consumption is very small compared to the period of the injected waveform, the power consumption can be considered constant and thus the above formula can still be considered valid.
  • the estimated calculated Vload voltage 306 is then compared to the desired set point of the voltage at the load (Voset) 307. The difference between these two values is the input to a proportional -integral regulator. The output of the regulator 308 can be interpreted as the voltage drop in the wiring 102. Then, the calculated voltage drop 308 is added to the desired set point of the voltage at the load 307 to derive the power supply voltage setting 309. A two-level voltage waveform 310 (e.g., a square wave or other suitable wave) is then added to the set point of the power supply voltage setting 309 to generate the necessary continuous variation between two defined voltage levels 311 for estimating the voltage at the input of the RLU 306.
  • a two-level voltage waveform 310 e.g., a square wave or other suitable wave
  • a rapid adjustment of the cable voltage drop can be controlled by multiplying the cable drop 308 by a number generated by dividing the measured value of the output current 112 by a filtered value (low pass filter) of the output current 113.
  • the control system is able to react quickly to rapid load changes. This multiplied cable drop can then be added to the desired set point of the voltage at the load to derive the power supply voltage setting, as described above.
  • the previously described embodiments may be used to continuously monitor the voltage and current reaching the RLU. Adjustments to voltage settings or output may be made automatically or manually as desired as the voltages reaching the RLU change or as RLU demands change.
  • the present disclosure may have presented a method and/or a process as a particular sequence of steps.
  • the method or process should not be limited to the particular sequence of steps described, as other sequences of steps may be possible. Therefore, the particular order of the steps disclosed herein should not be construed as limitations of the present disclosure.
  • disclosure directed to a method and/or process should not be limited to the performance of their steps in the order written. Such sequences may be varied and still remain within the scope of the present disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

Des unités de charge distantes (RLU) sont déployées loin de leurs sources d'alimentation régulées. Le principal inconvénient pour la RLU est la perte de transmission de puissance, car les câbles d'alimentation électrique alimentent la RLU loin du système d'alimentation électrique. Le transfert de la puissance à travers ces câbles est associé à une chute de tension qui augmente à mesure que la distance de transmission augmente. La réduction de la chute de tension peut s'effectuer en utilisant des câbles de plus grands diamètres. Cependant, ce procédé est inefficace en termes de coût et d'effort. Pour régler ce problème, la tension d'entrée de la RLU peut être commandée sans utiliser de nouveaux câbles plus lourds. L'invention concerne également des procédés et des dispositifs de régulation de la tension de RLU afin de limiter la chute de tension de câble et d'éviter des pertes provoquées par des interruptions de puissance. En fonctionnement, les procédés et les dispositifs de régulation de tension de l'invention permettent aux sources d'alimentation régulées d'alimenter les RLU en énergie d'une manière efficace.
PCT/US2023/020765 2022-05-03 2023-05-03 Dispositifs, systèmes et procédés de commande de tension d'entrée d'équipement distant Ceased WO2023215340A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263337669P 2022-05-03 2022-05-03
US63/337,669 2022-05-03

Publications (2)

Publication Number Publication Date
WO2023215340A2 true WO2023215340A2 (fr) 2023-11-09
WO2023215340A3 WO2023215340A3 (fr) 2023-12-21

Family

ID=88647752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2023/020765 Ceased WO2023215340A2 (fr) 2022-05-03 2023-05-03 Dispositifs, systèmes et procédés de commande de tension d'entrée d'équipement distant

Country Status (1)

Country Link
WO (1) WO2023215340A2 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7799020B2 (en) * 2006-10-02 2010-09-21 Conmed Corporation Near-instantaneous responsive closed loop control electrosurgical generator and method
US9488997B1 (en) * 2012-10-15 2016-11-08 Linear Technology Corporation Power over Ethernet system where power sourcing equipment detects actual voltage at powered device
US9808246B2 (en) * 2015-03-06 2017-11-07 Ethicon Endo-Surgery, Llc Method of operating a powered surgical instrument

Also Published As

Publication number Publication date
WO2023215340A3 (fr) 2023-12-21

Similar Documents

Publication Publication Date Title
US9444253B2 (en) Paralleling of active filters with independent controls
CN101223359B (zh) 风电场的功率调节
KR100669029B1 (ko) 풍력 터빈의 운전 방법
EP2549615B1 (fr) Système et procédé pour contrôler la tension sur un élément de distribution
CN100420117C (zh) 电网中的无功功率调节方法和产生电能的装置
WO2012109509A2 (fr) Appareil et procédé de production d'une tension de mesure de sortie pour un régulateur de tension, à l'aide d'un microprocesseur
US9389631B2 (en) System and method for reactive power compensation
Hiscock et al. Advanced voltage control for networks with distributed generation
US8232792B2 (en) System and method for controlling the output voltage of a power supply
KR20160028751A (ko) 전력 계통의 전압 안정도 관리 장치 및 그 방법
KR101123936B1 (ko) 분산전원 연계선로의 최적전압제어장치 및 방법
KR20150026243A (ko) 원격검침 데이터를 이용한 배전 전압 제어 장치 및 방법
CA3070188C (fr) Appareil et methode de prevention de surtension d'une ligne de distribution branchee sur une generatrice distribuee
Fang et al. Real-time voltage drop compensation method with cable impedance detection capability for remote power supply systems
JP6012492B2 (ja) 配電系統の電圧調整システム及び電圧調整方法
JP5611138B2 (ja) 電圧制御装置
WO2012169953A1 (fr) Système de charge de batterie
CN121336337A (zh) 用于求取在低压电网的网孔中的测量参量的方法、网孔电流调节器、系统和网孔电流调节器的应用
NO20160575A1 (en) Voltage Regulation for a Subsea Control System
JP6879652B1 (ja) 自励式無効電力補償装置
CN122052503A (zh) 一种电源输出控制方法、控制系统、存储介质及程序产品
JP2022032633A (ja) 分散電源の制御装置
CN114397938A (zh) 功率电源电缆末端电压的快速响应闭环补偿电路及方法
Schäfer et al. Optimal control of static VAr compensators in powersupply systems with electrical arc furnaces
CN116865580A (zh) 三相电压源变流器的控制方法、装置及电子设备

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23799960

Country of ref document: EP

Kind code of ref document: A2