大规模双馈风电机组并网频率稳定控制策略

doi:10.11930/j.issn.1004-9649.202003163

中国电力 ›› 2021, Vol. 54 ›› Issue (5): 186-194.DOI: 10.11930/j.issn.1004-9649.202003163

大规模双馈风电机组并网频率稳定控制策略

杨蕾¹, 王智超², 周鑫¹, 李胜男¹, 和鹏¹, 向川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. 云南电力调度控制中心，云南昆明 650011

收稿日期:2020-03-24 修回日期:2020-06-17 发布日期:2021-05-05
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;王智超(1993-),男,通信作者,硕士研究生,从事新能源并网、机网协调等研究,E-mail:305105718@qq.com
基金资助:
云南电网有限责任公司科技项目（056200KK52180067）；国家自然科学基金资助项目（51777176）

Frequency Stability Control Strategy for Large-scale Grid Connections with DFIG Units

YANG Lei¹, WANG Zhichao², ZHOU Xin¹, LI Shengnan¹, HE Peng¹, XIANG Chuan¹, 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 Dispatch Center, Kunming 650011, China

Received:2020-03-24 Revised:2020-06-17 Published:2021-05-05
Supported by:
This work is supported by Science and Technology Project of Yunnan Electric Power Co., Ltd. (No.056200KK52180067), the National Natural Science Foundation China (No.51777176)

摘要/Abstract

摘要： 风电在电网中的渗透率逐年升高，尽管其在优化电源结构、节能减排方面有颇多贡献，但是由于自然风的波动性和不确定性，大规模风电并网势必会对电网频率稳定等方面产生影响。针对此问题，对装机量较高的双馈型风力发电机组（doubly-fed induction generator，DFIG）控制系统进行研究，制定大规模双馈型风电机组并网下的频率稳定控制策略。在现有附加下垂控制及虚拟惯性控制的基础上，根据输入风速以及电网侧频率波动，对下垂控制环节进行变系数处理，改善下垂控制特性。将DFIG运行工况进行分类，并采用变减载系数，使DFIG在限功率运行的同时减少弃风。采用具有大规模风电并网接入的实际电网模型，仿真验证了所提频率稳定控制策略的有效性。

关键词: 双馈风电机组, 频率稳定, 变系数下垂控制, 虚拟惯性控制, 变减载系数, 大规模风电并网

Abstract: The penetration rate of wind power in the power grid has been increasing year by year. A lot of contributions have been made to optimize the power supply structure, energy conservation and emission reduction, however, due to the natural fluctuation and uncertainty of wind speed, grid integration with large-scale wind power is bound to impact the frequency stability of the power grid. With regard to this problem, the doubly-fed induction generator (DFIG) control system was studied in this paper and then the primary frequency modulation control strategy following large-scale DFIG connection was established. On the basis of the existing droop control and virtual inertia control strategy, the droop control part is implemented by virtue of variable coefficient according to the input wind speed and the frequency fluctuation of grid side, as to improve the droop control characteristics. Additionally, the operating conditions of DFIG are classified, and the load reduction coefficient is used to reduce the curtailment of wind while the DFIG is running at limited power level. The effectiveness of the proposed primary frequency modulation control strategy is verified by means of the simulation of an actual power grid model with large-scale wind power grid connection.

Key words: DFIG, frequency stability, variable coefficient droop control, virtual inertia control, variable coefficient offload control, large-scale wind power grid connection

杨蕾, 王智超, 周鑫, 李胜男, 和鹏, 向川, 张杰, 王德林. 大规模双馈风电机组并网频率稳定控制策略[J]. 中国电力, 2021, 54(5): 186-194.

YANG Lei, WANG Zhichao, ZHOU Xin, LI Shengnan, HE Peng, XIANG Chuan, ZHANG Jie, WANG Delin. Frequency Stability Control Strategy for Large-scale Grid Connections with DFIG Units[J]. Electric Power, 2021, 54(5): 186-194.

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https://www.electricpower.com.cn/CN/Y2021/V54/I5/186

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大规模双馈风电机组并网频率稳定控制策略

Frequency Stability Control Strategy for Large-scale Grid Connections with DFIG Units

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大规模双馈风电机组并网频率稳定控制策略

Frequency Stability Control Strategy for Large-scale Grid Connections with DFIG Units

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