考虑风速差异的风电场调频备用协调控制策略

doi:10.12204/j.issn.1000-7229.2023.02.010

电力建设 ›› 2023, Vol. 44 ›› Issue (2): 101-109.doi: 10.12204/j.issn.1000-7229.2023.02.010

考虑风速差异的风电场调频备用协调控制策略

张蕊¹(), 李晓明¹, 高泽明², 孟令聪³, 秦超³, 曾沅³, 张文旭³

1.国网河北省电力有限公司电力科学研究院,石家庄市 050021
2.国网河北省电力有限公司,石家庄市 050021
3.智能电网教育部重点实验室(天津大学),天津市 300072

收稿日期:2022-07-07 出版日期:2023-02-01 发布日期:2023-01-30
通讯作者: 张蕊(1988),女,硕士,高级工程师,从事电力系统运行与控制研究工作,E-mail:jennyxiaoxiao2008@126.com。
作者简介:李晓明(1982),男,硕士,高级工程师,从事电力系统运行与控制研究工作;
高泽明(1982),男,硕士,正高级工程师,从事电力系统运行与控制研究工作;
孟令聪(1999),男,硕士研究生,主要研究方向为电力系统安全性与稳定性;
秦超(1986),男,博士,副教授,主要研究方向为电力系统安全性与稳定性;
曾沅(1975),男,博士,副教授,博士生导师,主要研究方向为电力系统安全性与稳定性、电力系统可靠性与风险评估、电力系统规划;
张文旭(1998),男,硕士研究生,主要研究方向为电力系统设备状态趋势感知。
基金资助:
国家电网公司总部科技项目“基于数据驱动的复杂大电网有功频率控制策略研究”(5100-202113024A-0-0-00)

Coordinated Control of Frequency-Regulation Reserve Capacity for Wind Farm Considering Wind Speed Difference

ZHANG Rui¹(), LI Xiaoming¹, GAO Zeming², MENG Lingcong³, QIN Chao³, ZENG Yuan³, ZHANG Wenxu³

1. Electric Power Research Institute, State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050021, China
2. State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050021, China
3. Key Laboratory of Smart Grid, Ministry of Education (Tianjin University), Tianjin 300072, China

Received:2022-07-07 Online:2023-02-01 Published:2023-01-30
Supported by:
State Grid Corporation of China Research Program(5100-202113024A-0-0-00)

摘要/Abstract

摘要：

由于风资源分布的差异性,风电场内不同机组的减载备用能力不同。在预留减载备用时,风电场应考虑不同机组的减载备用能力差异。针对该问题,构建了双馈风机的可用调频容量模型,在此基础上,提出了考虑风速差异的风电场调频备用协调控制策略。该策略根据不同风速机组的可用调频容量差异协调风电场的调频资源,在满足备用容量的同时充分利用转子动能,通常仅需控制部分风机,简化系统复杂性。在DIgSILENT/PowerFactory中搭建了系统仿真模型,仿真结果表明所提策略使风电场内不同风速的机组协调配合,改善系统的频率调节能力,缓解同步机调频压力。

关键词: 双馈感应发电机, 风电场, 可用调频容量, 协调控制, 功率分配

Abstract:

Due to the difference of wind resource distribution, different units in the wind farm have different de-loading reserve capacity. When reserving de-loading reserve, the wind farm should consider the difference of de-loading reserve capacity of different units. In order to solve this problem, the available frequency-regulation capacity model of doubly-fed induction generator is constructed in this paper. According to this model, a coordinated control of frequency-regulation reserve capacity for wind farm considering wind speed difference is proposed. In this strategy, the frequency-regulation resources of wind farms are coordinated according to the differences of available frequency-regulation capacity of different wind turbines, and the kinetic energy of the rotor is fully utilized while the reserve capacity is satisfied. Usually, only part of the wind turbines are controlled, which simplifies the complexity of the control system. The system simulation model is built in DIgSILENT/PowerFactory. The simulation results show that the proposed strategy can coordinate the units with different wind speeds in the wind farm, improve the frequency-regulation capability of the system and alleviate the frequency-regulation pressure of the synchronous machine when load disturbance occurs.

Key words: doubly-fed induction generator, wind farm, available frequency-regulation capacity, coordinated control, active power allocation

中图分类号:

TM614

张蕊, 李晓明, 高泽明, 孟令聪, 秦超, 曾沅, 张文旭. 考虑风速差异的风电场调频备用协调控制策略[J]. 电力建设, 2023, 44(2): 101-109.

ZHANG Rui, LI Xiaoming, GAO Zeming, MENG Lingcong, QIN Chao, ZENG Yuan, ZHANG Wenxu. Coordinated Control of Frequency-Regulation Reserve Capacity for Wind Farm Considering Wind Speed Difference[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(2): 101-109.

图/表 17

图1 DFIG可用调频容量分布

Fig.1 Distribution of available frequency-regulation capacity of DFIG

图2 可用调频容量-转速曲线

Fig.2 Curve of available frequency-regulation capacity vs rotor speed

图3 风机减载控制与可用备用容量

Fig.3 Wind turbine de-loading control and available reserve capacity

图4 不同风速下DFIG的可用调频容量

Fig.4 Available frequency-regulation capacity of DFIG with different wind speeds

图5 减载控制协调流程

Fig.5 Flow of coordinated de-loading control

图6 风机减载控制策略

Fig.6 DFIG de-loading control strategy

图7 4机2区域系统接线图

Fig.7 Diagram of the modified 4-machine system

图8 风电场减载过程(算例1)

Fig.8 Wind farm de-loading process (case 1)

表1 风机减载功率分配(算例1)

Table 1 Wind turbines de-loading power distribution (case 1)

图9 系统频率变化曲线(算例1)

Fig.9 Curve of system frequency (case 1)

图10 发生扰动时风电场出力(算例1)

Fig.10 Wind farm output under disturbance(case 1)

图11 同步机出力(算例1)

Fig.11 Output of synchronous machine (case 1)

图12 风电场减载过程(算例2)

Fig.12 Wind farm de-loading process (case 2)

表2 风机减载功率分配(算例2)

Table 2 Wind turbines de-loading power distribution (case 2)

图13 系统频率变化曲线(算例2)

Fig.13 Curve of system frequency change (case 2)

图14 发生扰动时风电场出力(算例2)

Fig.14 Wind farm output when disturbance occurs (case 2)

图15 同步机G2出力(算例2)

Fig.15 Output of synchronous machine G2 (case 2)

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考虑风速差异的风电场调频备用协调控制策略

Coordinated Control of Frequency-Regulation Reserve Capacity for Wind Farm Considering Wind Speed Difference

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