WO2013174090A1 - Procédé de contrôle de puissance active de parc éolien pour l'amélioration de l'efficacité de génération du parc éolien - Google Patents

Procédé de contrôle de puissance active de parc éolien pour l'amélioration de l'efficacité de génération du parc éolien Download PDF

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Publication number
WO2013174090A1
WO2013174090A1 PCT/CN2012/082316 CN2012082316W WO2013174090A1 WO 2013174090 A1 WO2013174090 A1 WO 2013174090A1 CN 2012082316 W CN2012082316 W CN 2012082316W WO 2013174090 A1 WO2013174090 A1 WO 2013174090A1
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WIPO (PCT)
Prior art keywords
control
wind turbine
wind
active power
short
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/CN2012/082316
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English (en)
Chinese (zh)
Inventor
黄越辉
刘德伟
刘纯
李鹏
马烁
许晓艳
付敏
柴海棣
杨硕
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.)
China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
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Application filed by China Electric Power Research Institute Co Ltd CEPRI, State Grid Corp of China SGCC filed Critical China Electric Power Research Institute Co Ltd CEPRI
Publication of WO2013174090A1 publication Critical patent/WO2013174090A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/46—Controlling the sharing of generated power between the generators, sources or networks
    • H02J3/48—Controlling the sharing of active power
    • 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
    • H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/381—Dispersed generators
    • 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
    • H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/46—Controlling the sharing of generated power between the generators, sources or networks
    • H02J3/466—Scheduling or selectively controlling the operation of the generators or sources, e.g. connecting or disconnecting generators to meet a demand
    • H02J3/472—Scheduling or selectively controlling the operation of the generators or sources, e.g. connecting or disconnecting generators to meet a demand for selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
    • 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
    • H02J2101/00—Supply or distribution of decentralised, dispersed or local electric power generation
    • H02J2101/20—Dispersed power generation using renewable energy sources
    • H02J2101/28—Wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Definitions

  • the present invention relates to the field of new energy power generation and access technology, and particularly relates to a wind power active power control method for improving wind farm power generation efficiency. Background technique
  • China's wind power grid-connected capacity has exceeded 43GW, and grid-connected wind farms have exceeded 600.
  • China's wind power installed capacity will reach 150GW, gp, and wind power will continue to grow at a rate of more than 10GW per year.
  • China's wind-rich areas are mostly in the “Three North” region, more than 90% of wind power is concentrated in the “Three North” area by centralized development, and most of the wind farms are integrated into the remote areas where the power grid is weak, and local load demand is limited. , need to rely on a strong grid structure to achieve all delivery.
  • the present invention provides a wind power active power control method for improving the power generation efficiency of a wind farm.
  • the two control cycles are coordinated and controlled, and the start and stop and control objectives of each wind turbine are reasonably arranged, so that the active output of the entire wind farm follows the control target value, and the power generation efficiency and wind energy utilization rate of the wind farm are maximized.
  • a method for controlling active power of a wind farm for improving power generation efficiency of a wind farm comprising the steps of: measuring and storing the active power of the wind farm connected to the grid, the measurement data of the wind tower, and the operation data of the wind turbine; Step 2: It is judged whether to execute long control period control, short control period control or neither, if step 2 is executed, step 3 is executed, if short control period control is executed, step is executed, if both are not executed, return step 1 ;
  • Step 3 Calculate the maximum theoretical power generation P of the wind turbine for the next long control period, select the wind turbine that participates in the short control period control, and then calculate the start and stop state of the wind turbine and the control target, and issue the calculation result To the main control of the wind turbine;
  • the actual value of the active power P t of the wind farm is determined step by step. whether there tal wind farm power control target value P ai "of the difference exceeds a deadband, adjust the active power if the wind turbine is performed, otherwise if Step 1.
  • the measurement data of the wind tower includes wind speed, wind direction, temperature, humidity and air pressure
  • the operation data of the wind turbine includes active power, gear box rotation speed, fan pitch angle and head wind speed.
  • step 2 determining whether to perform long control period control, short control period control, or both according to the wind power having a power control target value P ⁇ , the active power of the wind farm grid-connected point, and the update status of the timer Not executed.
  • the step 3 includes the following steps:
  • Step 3-1 Calculate the maximum theoretical power generation of the wind turbine for the next long control period based on the stored wind farm and wind turbine operating parameters.
  • Step 3-2 Calculating the minimum controllable theoretical power generation of the wind turbine according to the characteristics of the wind turbine and the maximum theoretical power generation. For the stall type wind turbine and the wind turbine that can only participate in the start-stop control and cannot participate in the active power adjustment, set The minimum controllable theoretical power generation P is equal to the maximum theoretical power generation P ⁇ ;
  • Step 3-3 Calculate the theoretical power generation P ⁇ of the next long control period of the wind turbine in which the start-stop and active power adjustment cannot participate.
  • Said P. disturb t . . . tol is equal to the sum of the maximum theoretical power generation of the wind turbines that cannot participate in the active power regulation, ie P ⁇ EP, then the control target of the wind turbine that can participate in the active power regulation is P till f equals and ⁇ — ⁇ L;
  • Step 3-4 If the wind turbine can participate in the short control cycle control, the minimum theoretical power generation ⁇ ⁇ . ⁇ is involved in the active power regulation in the wind turbine to meet the vessel > ⁇ ⁇ .
  • the wind turbine is a wind turbine that can participate in short control cycle control, and its adjustable capacity P ust is equal to P . Sll . u difference, ie Selecting a relatively large wind turbine from a wind turbine that can participate in short control cycle control as a wind turbine participating in short control cycle control until the adjustable capacity of the selected wind turbine meets the requirements or the windless motor group is optional;
  • Step 3-5 Calculate the start-stop state of the wind turbine that does not participate in the short control cycle control
  • the predicted active power P sh of the next long control period of the wind turbine participating in the short control period is calculated.
  • the control target of the wind turbine that does not participate in the short control period control is Pk equal to the difference between P forum f and P sh rts «, ie r longref r ref f shorts urn »
  • the larger shutdown wind turbine is preferentially selected for the start-up operation, and the wind turbine is added to the Psummax. Until P ⁇ P or no wind turbines are optional;
  • Step 3-6 According to ⁇ 1 ( 3 ⁇ 4 ⁇ 2 , and calculate the control target P f of the wind turbine that is not involved in the short control cycle control and the wind turbine that is about to start; participate in the start-stop control and cannot participate in the active power adjustment.
  • the predicted active power of the next long control cycle of the wind turbine to be started is Pstml equal to the sum of the maximum theoretical power generation of the wind turbines that are participating in the start-stop control and cannot participate in the active power regulation, ie ⁇ ⁇ ⁇ 1 TM; in the wind turbines that are not involved in the short control cycle control, the wind turbines that can participate in the active power regulation control target
  • Step 3-7 According to P ⁇ P and calculate the control target of the wind turbine that participates in the short control cycle control ⁇ ⁇ ; according to the wind turbine of the wind turbine that does not participate in the short control cycle control, and the active regulation curve of the wind turbine And the start-stop curve, calculate the theoretical power generation of the wind turbine before reaching the next short control period ⁇ ⁇ ⁇ ; then participate in the short control period control of the wind turbine control target combined with P sh .
  • rtIE is the difference between P thoroughly f and ⁇ ⁇ . ses ⁇ «, where ⁇ ⁇ . ⁇ ⁇ is the theoretical power generation of wind turbines that do not participate in short control cycle control.
  • Step 3-8 The calculated wind turbine start and stop status and P f are sent to the wind turbine main control to complete the long control period control.
  • the step 4 includes the following steps:
  • Step 4-1 Compare the active power value P t of the current wind farm grid point. Ta P wind farm active power control target value P aiquaint, whether the difference between the two exceeds the control dead zone, if yes, proceed to the next step, otherwise return to step 1;
  • Step 4-2 If P total >P aiquaint, that is, the active power of the wind turbine is reduced; reading the active power of the wind turbine participating in the short control period control and reading pi p , the wind turbine does not have the ability to down-regulate , set its control target to the minimum controllable power generation value, no longer participate in subsequent calculations; if pi>P Cor, its adjustable capacity According to P t . Tal , P aiêt and P ust calculate the control target P of the wind turbine; the calculated P value of the wind turbine is sent to the main control of the wind turbine, and the short control cycle control is completed, and the process returns to step 1.
  • Step 4-3 If P t .
  • the maximum theoretical power generation capacity of the short control cycle of the wind turbine with short control period control if Piont, the wind turbine does not have the ability to up-regulate, set its control target to the current active power value, and no longer participate in subsequent calculations;
  • the wind turbine has the ability to be adjusted up, and its adjustable capacity is based on P t .
  • Tal , PTM and P ust calculate the control target P of each wind turbine; the calculated wind turbine value is sent to the wind turbine master, complete this short control cycle control, and return to step 1.
  • the present invention has considered the maximum theoretical power generation of each wind turbine at the next moment before the long control cycle control performs control target allocation and execution control for each wind turbine group, so the control target value assigned to the wind turbine is more reasonable. Control accuracy can be guaranteed;
  • the present invention performs rapid active power adjustment on some wind turbines according to the current wind farm grid-connected point power and active regulation performance, in order to eliminate the prediction error of the wind turbine's maximum theoretical power generation capacity and the fluctuation of wind power. , making the active output of the entire wind farm closely follow the control target value, maximizing the power generation efficiency of the wind farm, and improving the economical operation of the wind turbine;
  • the invention predicts the maximum theoretical power generation capacity of each wind turbine at the next moment, and performs fast tracking adjustment of some wind turbines in the short control period control, which is suitable for the inclusion of stall-type fans or due to certain conditions. Some wind turbines cannot participate in active power control of wind farms with active power control.
  • Figure 1 is a flow chart of an embodiment of the present invention
  • FIG. 2 is a flow chart of a long control period control in an embodiment of the present invention.
  • a wind power active power control method for improving wind power generation efficiency includes the following steps:
  • Step 1 Measure and store the active power of the wind farm and the measured data of the wind tower, the operating data of the wind turbine;
  • Step 2 Determine whether to perform long control period control, short control period control or neither If the long control period control is executed, step 3 is performed, if short control period control is executed, step 4 is performed, and if neither is executed, step 1 is returned;
  • Step 3 Calculate the maximum theoretical power generation P of the wind turbine for the next long control period, select the wind turbine that participates in the short control period control, and then calculate the start and stop state of the wind turbine and the control target, and send the calculation result to Wind turbine master;
  • Step 4 Determine the actual value of the active power of the wind farm P t . Whether the difference between the tal and the wind farm has a power control target value P ⁇ exceeds the control dead zone, and if so, performs the active power adjustment of the wind turbine, if not, returns to step 1
  • the measurement data of the wind tower includes wind speed, wind direction, temperature, humidity and air pressure
  • the operation data of the wind turbine includes active power, gear box rotation speed, fan pitch angle and nose wind speed.
  • step 2 determining whether to perform long control period control, short control period control, or both according to the wind power having the power control target value P aiyakchange condition, the active power of the wind farm grid-connected point, and the update status of the timer None of them are executed.
  • the step 3 includes the following steps:
  • Step 3-1 calculating a maximum theoretical power generation PTM of the wind turbine for the next long control period according to the stored wind farm and the wind turbine operating parameters;
  • Step 3-2 Calculate the minimum controllable theoretical power generation of the wind turbine according to the characteristics of the wind turbine and the maximum theoretical power generation. For the stall type wind turbine and the wind turbine that can only participate in the start-stop control and cannot participate in the active power adjustment, set it.
  • the minimum controllable theoretical power generation P is equal to the maximum theoretical power generation ⁇ ⁇ ;
  • Step 3-3 Calculate the theoretical power generation of the next long control period of the wind turbine group that cannot participate in the start-stop and active power adjustment.
  • ⁇ the P ⁇ t ⁇ is equal to the in-service that cannot participate in the active power adjustment.
  • P ⁇ EP the control target may be involved in regulation of active power wind turbine and is equal to the combined RF P
  • Step 3-4 If the wind turbine can participate in the short control cycle control, the minimum theoretical power generation P h ⁇ . u and the wind power generator group participating in the active power adjustment satisfy P ⁇ i ⁇ d, then the wind turbine is a wind turbine that can participate in the short control period control, and the adjustable capacity P ust is equal to the difference between ⁇ ⁇ , ie From being able to participate in short control cycle control
  • the wind turbine of the system is selected as a wind turbine with relatively large pi st as the wind turbine participating in the short control period control until the adjustable capacity of the selected wind turbine meets the requirements or the windless motor unit is optional;
  • Step 3-5 Calculate the start-stop state of the wind turbine that does not participate in the short control cycle control
  • the predicted active power P sh of the long control period of the wind turbine participating in the short control period is calculated.
  • Rtsu ., the P sh . Rts « equals the minimum theoretical power generation Pit ⁇ of the wind turbines participating in the short control period control, that is, ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ , the control objectives of the wind turbines that do not participate in the short control period control? ⁇ equals? ⁇ And? ⁇ difference, ie r longref - ⁇ ref ⁇ shortsum »
  • shut-off wind turbine is preferentially selected for the start-up operation, and the wind turbine is selected.
  • Step 3-6 According to P 1 ⁇ gêt i2 , and ? calculate the control target PA of the wind turbine that is not involved in the short control cycle control and the wind turbine that is about to start; participate in the start and stop control and cannot participate in the active power adjustment.
  • the wind turbine is about to start the next long period of co-predictive control of active power equal participation in start-stop control and regulation of active power can not participate in the operation and about to start the largest wind turbine power generation theory ⁇ " ⁇ sum that ⁇ ⁇ ⁇ ⁇ ⁇ ;
  • the wind turbine control targets that can participate in the active power adjustment are combined
  • Step 3-7 Calculate the control target P B i Vietnamese i of the wind turbine participating in the short control cycle control according to ⁇ and P ; P f and the wind turbine according to the wind turbine that does not participate in the short control cycle control, and the wind turbine
  • the active regulation curve and the start-stop curve are calculated to calculate the theoretical power generation P of the wind turbine before reaching the next short control period.
  • M is the wind turbine control target P sh participating in the short control period control. Ite is P Irf and ⁇ P .
  • the difference between sn consider t where ⁇ ⁇ ⁇ vine ⁇ is the theoretical power generation of the wind turbine that does not participate in the short control period control;
  • Step 3-8 The calculated start and stop status of the wind turbine is sent to the wind turbine master to complete the long control cycle control.
  • the step 4 includes the following steps:
  • Step 4-1 Compare the active power value of the current wind farm grid point P t ta P Wind farm active power control target value P aiquaint Whether the difference exceeds the control dead zone, if yes, execute the next step, if not return step 1 ;
  • Step 4-2 If P t tal >P aiêt, the active power of the wind turbine is reduced; reading the active power of the wind turbine participating in the short control cycle control and reading pi P, the wind turbine does not have the ability to down-regulate , set its control target to the minimum controllable power generation value, and no longer participate in subsequent calculations; if ? 1 ⁇ ? ⁇ , its adjustable capacity According to P T TAL P ⁇ and calculate the control target P f of the wind turbine ; the calculated wind turbine value is sent to the wind turbine master, complete the short control cycle control, return to step 1
  • Step 4-3 If P t tal ⁇ P aiquaint, that is, the active power of the wind turbine is up-regulated; read the active power of the wind turbine participating in the short control period control and according to the historical data of the stored wind farm and the operating state of the wind turbine And wind power prediction information, calculate the maximum theoretical power generation capacity P of the short control period of the wind turbine participating in the short control period control. If Pi P , the wind turbine does not have the ability to be up-regulated, and set its control target to the current active power value. , no longer participate in subsequent calculations; if Pi ⁇ Pi, the wind turbine has the ability to be adjusted, its adjustable capacity According to P TOTAL P AIM and
  • P US calculates the control target P of each wind turbine; the calculated wind turbine value is sent to the main control of the wind turbine, and the cost is controlled by the second short control period, returning to step 1
  • the present invention uses two long and short control cycles for coordinated control, reasonably arranging the start and stop and control objectives of each wind turbine, so that the active output of the entire wind farm closely follows the control target value, maximizing wind power. Field power generation efficiency and wind energy utilization.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)

Abstract

Cette invention concerne un procédé de contrôle de puissance active de parc éolien pour l'amélioration de l'efficacité de génération du parc éolien. Ledit procédé comprend les étapes consistant à : calculer initialement la puissance de génération théorique maximale de chaque turbine éolienne du parc éolien pour le temps suivant ; effectuer un contrôle de coordination avec des cycles de commande long et court ; déterminer le démarrage/arrêt de chaque éolienne, ainsi qu'une valeur de commande cible de façon à atteindre le contrôle optimal de la puissance active de sortie du parc éolien. La valeur de commande cible attribuée aux éoliennes lors du contrôle du cycle de commande est rationnelle et le procédé selon l'invention assure un contrôle précis. Lors du contrôle du cycle de commande court, un ajustement rapide de la puissance active est réalisé pour certaines des éoliennes, de façon à éliminer les erreurs de prévision de la capacité de génération théorique maximale des éoliennes et les fluctuations de l'énergie éolienne. Ainsi, la puissance active de sortie de la totalité du parc éolien se conforme à la valeur de commande cible et l'efficacité de génération du parc éolien est améliorée dans la mesure du possible. La solution selon l'invention est adaptée aux parcs éoliens qui comprennent des turbines éoliennes régulées par décrochage aérodynamique ou quelques éoliennes qui, dans certains cas, ne participent pas au contrôle de la puissance active, pour atteindre le contrôle de la puissance active.
PCT/CN2012/082316 2012-05-22 2012-09-28 Procédé de contrôle de puissance active de parc éolien pour l'amélioration de l'efficacité de génération du parc éolien Ceased WO2013174090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210160289.4A CN102709939B (zh) 2012-05-22 2012-05-22 一种提高风电场发电效率的风电场有功功率控制方法
CN201210160289.4 2012-05-22

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CN109672224A (zh) * 2017-10-17 2019-04-23 中车株洲电力机车研究所有限公司 一种风电场有功功率控制方法及系统
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