基于限功率运行的DFIG与SVG协调电压控制策略

doi:10.12204/j.issn.1000-7229.2020.10.014

电力建设 ›› 2020, Vol. 41 ›› Issue (10): 125-132.doi: 10.12204/j.issn.1000-7229.2020.10.014

基于限功率运行的DFIG与SVG协调电压控制策略

杨蕾¹, 廖佳思², 郭成¹, 周鑫¹, 向川¹, 黄伟³, 奚鑫泽¹, 王德林²

1.云南电网有限责任公司电力科学研究院,昆明市 650217
2.西南交通大学电气工程学院,成都市 611756
3.云南电网有限责任公司电力调度控制中心,昆明市 650011

收稿日期:2020-04-23 出版日期:2020-10-01 发布日期:2020-09-30
通讯作者: 廖佳思
作者简介:杨蕾(1986),女,硕士,工程师,研究方向为电力系统稳定分析与控制、继电保护等;|郭成(1978),男,博士,教授级高级工程师,研究方向为电力系统稳定与控制、新能源并网技术、电能质量监测与控制等;|周鑫(1984),男,硕士,工程师,研究方向为频率稳定与控制、网源协调等;|向川(1991),男,硕士,助理工程师,研究方向为系统仿真分析;|黄伟(1979),男,博士,高级工程师,研究方向为电力系统运行与分析;|奚鑫泽(1988),男,博士,研究方向为新能源并网技术与系统分析;|王德林(1970),男,教授,博士生导师,研究方向为电力系统频率稳定、机电动态、连续体建模、机电波传播和风电调频等。
基金资助:
云南电网有限责任公司科技项目(056200KK52180067);国家自然科学基金项目(51777176)

Voltage Control Strategy of DFIG Coordinating with SVG Under Power-Limited Operation

YANG Lei¹, LIAO Jiasi², GUO Cheng¹, ZHOU Xin¹, XIANG Chuan¹, HUANG Wei³, XI Xinze¹, WANG Delin²

1. Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, China
2. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China
3. Power Dispatching Control Center, Yunnan Power Grid Co., Ltd., Kunming 650011, China

Received:2020-04-23 Online:2020-10-01 Published:2020-09-30
Contact: LIAO Jiasi
Supported by:
National Natural Science Foundation of China(51777176)

摘要/Abstract

摘要：

双馈感应电机(doubly-fed induction generator,DFIG)具有变速恒频的运行特点,已成为目前的主流发电机。双馈风机能够发出和吸收无功,对风机并网点(point of common coupling, PCC)电压起到支撑作用。在分析DFIG等效电路基础上,根据DFIG定子侧输出的有功与无功关系,提出一种限功率运行条件下DFIG与静止无功发生器(static var generator,SVG)的电压协调控制策略。正常情况下DFIG工作在最大功率点跟踪(maximum power point tracking,MPPT)模式,SVG控制PCC电压在合理范围内;PCC电压越限时,DFIG进入限功率运行模式,DFIG与SVG协调控制PCC电压且优先考虑DFIG的无功调压能力。最后,基于DFIG并网的仿真模型,验证了所提出的电压协调控制策略的有效性和可行性。

关键词: 双馈感应电机, 静止无功发生器, 协调运行, 电压控制, 限功率运行

Abstract:

Due to its variable-speed constant-frequency operation characteristics, DFIG has become the current mainstream wind power generators. DFIG can generate and absorb reactive power, and support the voltage of point of common coupling (PCC). On the basis of the analysis of the equivalent circuit of DFIG, according to the relationship between the active and reactive power output from the stator side of DFIG, a coordinated voltage control strategy of DFIG under power-limited operation and SVG is proposed. Under normal condition, DFIG operates in Maximum Power Point Tracking (MPPT) mode, and SVG controls the voltage of PCC within a reasonable range. When the voltage of PCC exceeds the limit, DFIG enters the power-limited operation mode. Then DFIG and SVG coordinately control the voltage of PCC and the reactive power regulation capability of DFIG is in priority use. Finally, the effectiveness of the proposed voltage coordinated control strategy is verified by simulation.

Key words: DFIG, SVG, coordinated operation, voltage control, power-limited operation

中图分类号:

TM614

杨蕾, 廖佳思, 郭成, 周鑫, 向川, 黄伟, 奚鑫泽, 王德林. 基于限功率运行的DFIG与SVG协调电压控制策略[J]. 电力建设, 2020, 41(10): 125-132.

YANG Lei, LIAO Jiasi, GUO Cheng, ZHOU Xin, XIANG Chuan, HUANG Wei, XI Xinze, WANG Delin. Voltage Control Strategy of DFIG Coordinating with SVG Under Power-Limited Operation[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(10): 125-132.

图/表 13

图1 DFIG的P-Q特性曲线

Fig.1 P-Q characteristic curve of DFIG

图2 SVG并网等效电路

Fig.2 Equivalent circuit of grid-connected SVG

图3 风电场并网控制图

Fig.3 Chart of wind farm grid-connection control

图4 DFIG有功功率控制结构

Fig.4 Structure of DFIG active power controller

图5 DFIG无功功率控制结构

Fig.5 Structure of DFIG reactive power controller

图6 SVG控制结构

Fig.6 Structure of SVG controller

图7 无功电压协调控制原理

Fig.7 Principle of reactive power and voltage coordinated control

图8 风电场并网接线图

Fig.8 Simulation diagram after wind farm integration

表1 DFIG与SVG的参数

Table 1 Parameters of the DFIG and SVG

表2 仿真算例的3种工况

Table 2 Three working conditions of simulation examples

图9 10 m/s风速的仿真结果

Fig.9 Simulation results under 10m/s wind speed

图10 实际风速

Fig.10 Actual wind speed

图11 实际风速下的仿真结果

Fig.11 Simulation result under actual wind speed

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基于限功率运行的DFIG与SVG协调电压控制策略

Voltage Control Strategy of DFIG Coordinating with SVG Under Power-Limited Operation

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