发电技术 ›› 2022, Vol. 43 ›› Issue (2): 207-217.DOI: 10.12096/j.2096-4528.pgt.22043

• 海上风力发电技术 • 上一篇    下一篇

海上风电集群与火电打捆外送系统短路比定义及影响因素分析

陈作舟1, 余浩2, 王盼盼3, 陈鸿琳2, 陈武晖3   

  1. 1.江苏大学电气信息工程学院, 江苏省 镇江市 212013
    2.广东电网有限责任公司电网规划研究中心, 广东省 广州市 510080
    3.太原理工大学电气与动力工程学院, 山西省 太原市 030024
  • 收稿日期:2022-02-18 出版日期:2022-04-30 发布日期:2022-05-13
  • 作者简介:陈作舟(1996),男,硕士研究生,研究方向为电力系统分析与控制,445486640@qq.com
    陈武晖(1974),男,博士,教授,研究方向为电力系统分析与控制,本文通信作者,chenwuhui@tyut.edu.cn
  • 基金资助:
    国家自然科学基金项目(51977098);广东省重点领域研发计划(2021B0101230004)

Definition and Influencing Factors of Short-Circuit Ratio Between Offshore Wind Power Cluster and Thermal Power Bundling System

Zuozhou CHEN1, Hao YU2, Panpan WANG3, Honglin CHEN2, Wuhui CHEN3   

  1. 1.School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
    2.Grid Planning & Research Center, Guangdong Power Grid Co. , Ltd. , Guangzhou 510080, Guangdong Province, China
    3.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China
  • Received:2022-02-18 Published:2022-04-30 Online:2022-05-13
  • Supported by:
    National Natural Science Foundation of China(51977098);Research and Development Plan in Key Areas of Guangdong Province(2021B0101230004)

摘要:

短路比是度量风电场接入交流系统诱发次同步振荡风险的重要指标。对于风火打捆并网运行的短路比,目前并无明确定义和详细的计算公式。由此,针对某实际规划双海上风电集群与火电打捆系统场景,提出了一种短路比计算方法,揭示计及双风电集群相互作用对次同步振荡的影响。研究结果显示,风火打捆并网对系统短路比有提升作用,相比于纯风电,能减缓短路比降低的速度,并提高次同步振荡时的稳定性。通过公式分析,风火打捆短路比3项影响因素为系统阻抗、风机配比、风火比例,三者对发生次同步振荡的临界短路比的影响比重不同,分析结果显示,风机配比对次同步振荡的影响比重最小,风火比例的影响比重最大。最后,在PSCAD/EMTDC中搭建某实际规划海上风电集群与火电打捆系统模型,验证了上述研究结果的合理性。

关键词: 海上风电, 风火打捆, 短路比, 系统解耦, 次同步振荡

Abstract:

The short-circuit ratio is an important indicator to measure the risk of subsynchronous oscillation induced by the access of the wind farm to alternating current system. The current short-circuit ratio does not have a clear definition and a detailed calculation formula for the short-circuit ratio of wind-fire bundled and grid-connected operation has not been given. Therefore, for an actual planning scenario of dual offshore wind power clusters and thermal power bundling system, a short-circuit ratio calculation method was proposed to reveal the influence of the interaction of dual wind power clusters on subsynchronous oscillation. The research results show that the wind-fire bundling and grid connection can improve the short-circuit ratio of the system. Compared with pure wind power, the speed of reducing the short-circuit ratio is slowed down and the stability of subsynchronous oscillation is improved. From the analysis of the formula, the three influencing factors of the short-circuit ratio of wind-fire bundling are system impedance, fan ratio, and wind-fire ratio. The analysis results show that the fan ratio has the least impact on the subsynchronous oscillation, and the wind-fire ratio has the greatest impact. Finally, a model of an actual planning offshore wind power cluster and thermal power bundling system was built in PSCAD/EMTDC to verify the rationality of the above research results.

Key words: offshore wind power, wind and fire bundling, short-circuit ratio, system decoupling, subsynchronous oscillation

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