DFIG风电机组协同SVG抑制电网低频振荡方法

doi:10.11930/j.issn.1004-9649.201912045

中国电力 ›› 2020, Vol. 53 ›› Issue (11): 175-184,201.DOI: 10.11930/j.issn.1004-9649.201912045

DFIG风电机组协同SVG抑制电网低频振荡方法

杨蕾¹, 甘维公², 李胜男¹, 周鑫¹, 和鹏¹, 何鑫¹, 张杰³, 王德林²

1. 云南电网有限责任公司电力科学研究院，云南昆明 650217;
2. 西南交通大学电气工程学院，四川成都 611756;
3. 云南电力调度中心，云南昆明 650011

收稿日期:2019-12-10 修回日期:2020-01-30 出版日期:2020-11-05 发布日期:2020-11-05
通讯作者: 云南电网有限责任公司科技项目(056200KK52180067)，国家自然科学基金资助项目(51777176)
作者简介:杨蕾(1986—)，女，硕士，工程师，从事电力系统稳定分析与控制、继电保护等研究，E-mail：15911577929@139.com;甘维公(1996—)，男，通信作者，硕士研究生，从事新能源并网、低频振荡等研究，E-mail：monstermash@qq.com;李胜男(1971—)，女，高级工程师(教授级)，从事电力系统继电保护、机网协调方向的研究和试验;周鑫(1984—)，男，硕士，工程师，从事频率稳定与控制、网源协调等研究，E-mail：zhouxin8421@126.com
基金资助:
This work is supported by the Science and Technology Project of Yunnan Power Grid Co., Ltd. (No.056200KK52180067) and National Natural Science Foundation of China (No.51777176)

Method of DFIG Cooperating with SVG to Suppress Low-Frequency Oscillation in Power Systems

YANG Lei¹, GAN Weigong², LI Shengnan¹, ZHOU Xin¹, HE Peng¹, HE Xin¹, ZHANG Jie³, 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. Yunnan Power Dispatching Center, Kunming 650011, China

Received:2019-12-10 Revised:2020-01-30 Online:2020-11-05 Published:2020-11-05

摘要/Abstract

摘要： 随着风电渗透率的日益增加，电力系统阻尼不足时易发生低频振荡，双馈风电机组（DFIG）可解耦控制有无功和无功输出，有利于增强系统阻尼。提出一种DFIG协同静止无功发生器（SVG）并网的方法，采用附加阻尼的控制策略，接入控制系统的功率控制节点，改变参考装置的有功和无功参考电流，实现装置动态输出功率，抵消功率增量，对系统中产生的功率振荡进行抑制。搭建DFIG协同SVG并网的4机2区域系统的控制系统模型，添加附加阻尼控制信号，控制DFIG输出的有功功率和SVG输出的无功功率，改变系统的特征根，并基于Prony方法分析振荡信号各模态。结果表明：该方法能够有效提供正阻尼，抑制系统低频振荡，加速振荡波形平息，提高电力系统的小干扰稳定性。

关键词: DFIG, SVG, 低频振荡, 附加阻尼控制, 控制策略

Abstract: With the increasing penetration of wind power, when the power system is insufficiently damped, low-frequency oscillations are likely to occur. Doubly fed induction generation (DFIG) can decouple the control of active and reactive power, which helps enhance system damping. This paper proposes a method for grid connection of DFIG units with static var generator (SVG). It adopts a control strategy of additional damping, accesses the power control node of the control system, changes the active and reactive reference current of the device, and realizes the dynamic output power of the device to offset the power increase to suppress the power oscillations in the system. The control system model of DFIG and SVG connected to 4-machine 2-area system is built. Additional damping control signals are added to control the active power of DFIG and the reactive power of SVG. The characteristic root of the system is changed, and the modalities of the oscillating signals are analyzed based on Prony method. The results show that the method can effectively provide positive damping, suppress low-frequency oscillation of the system, accelerate the stabilization of oscillation waveform and improve the small signal stability of the power system.

Key words: DFIG, SVG, low frequency oscillation, additional damping control, control strategy

杨蕾, 甘维公, 李胜男, 周鑫, 和鹏, 何鑫, 张杰, 王德林. DFIG风电机组协同SVG抑制电网低频振荡方法[J]. 中国电力, 2020, 53(11): 175-184,201.

YANG Lei, GAN Weigong, LI Shengnan, ZHOU Xin, HE Peng, HE Xin, ZHANG Jie, WANG Delin. Method of DFIG Cooperating with SVG to Suppress Low-Frequency Oscillation in Power Systems[J]. Electric Power, 2020, 53(11): 175-184,201.

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DFIG风电机组协同SVG抑制电网低频振荡方法

Method of DFIG Cooperating with SVG to Suppress Low-Frequency Oscillation in Power Systems

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DFIG风电机组协同SVG抑制电网低频振荡方法

Method of DFIG Cooperating with SVG to Suppress Low-Frequency Oscillation in Power Systems

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