徐群伟,罗华峰,梅冰笑,刘浩军,朱非白,朱汉山,陈向荣
XU Qunwei,LUO Huafeng,MEI Bingxiao,LIU Haojun,ZHU Feibai,ZHU Hanshan,CHEN Xiangrong

• 1:国网浙江省电力有限公司电力科学研究院
• 2:浙江大学电气工程学院

摘要(Abstract)：

海上风电场并网易引起电力系统的谐波谐振问题，从而威胁到电网的安全运行。为此研究了海上风电场并网对陆上电网PCC（公共耦合点）暂态过电压和谐波谐振特性的影响，并提出了谐波谐振的治理方案。首先对浙江省某海上风电场并网工程进行PSCAD仿真建模。然后通过仿真计算得到并网系统在不同运行方式下的暂态过电压和谐波谐振特性。研究结果表明：在不同运行方式下，PCC暂态过电压标幺值最大值为2.1 p.u.，小于限制值3.0 p.u.，符合安全要求。最后采用在PCC处并联5次和7次低阻抗支路滤波器的谐波抑制策略，使得PCC谐波放大现象明显减弱，总谐波畸变率大幅下降，均小于1.5%，消除了2～7次低频谐波放大现象。
Grid-connected offshore wind farms are likely to cause harmonic resonances in the power system that jeopardize the safe operation of the power grid. To this end, the impact of grid-connected offshore wind farms on the transient overvoltage and harmonic resonance characteristics of the onshore power grid PCC(point of common coupling) is studied, and a harmonic resonance management scheme is proposed. Firstly, PSCAD simulation modeling is performed for a grid-connected project of offshore wind farms in Zhejiang Province. Then the transient overvoltage and harmonic resonance characteristics of the grid-connected system under different operation modes are obtained by simulation. The results show that the maximum per-unit value of PCC transient overvoltage is 2.1 p.u., which is less than the limit value of 3.0 p.u. and meets the safety requirements. Finally, the harmonic suppression strategy of parallel connection with low impedance branch filters five times and seven times respectively at PCC that significantly weakens the harmonic amplification of PCC and reduces the total harmonic distortion rate to less than 1.5%, eliminating the second to seventh low-frequency harmonic amplification.

关键词(KeyWords)： 海上风电场;暂态过电压;谐波谐振;并联滤波器
offshore wind farm;transient overvoltage;harmonic resonance;parallel filter

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（5211DS22000F）

作者(Author): 徐群伟,罗华峰,梅冰笑,刘浩军,朱非白,朱汉山,陈向荣
XU Qunwei,LUO Huafeng,MEI Bingxiao,LIU Haojun,ZHU Feibai,ZHU Hanshan,CHEN Xiangrong

DOI: 10.19585/j.zjdl.202302001

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