项中明,倪秋龙,李振华,徐建平,李斯迅,张哲任,徐政
XIANG Zhongming,NI Qiulong,LI Zhenhua,XU Jianping,LI Sixun,ZHANG Zheren,XU Zheng

• 1:国网浙江省电力有限公司
• 2:国网浙江省电力有限公司金华供电公司
• 3:浙江大学电气工程学院

摘要(Abstract)：

采用PSC（功率同步控制）的构网型换流器在电力系统中的比例逐年增加，然而对其暂态同步稳定性却缺乏深入研究。对此，分析了采用PSC的构网型换流器并网暂态同步稳定机理，并提出改善换流器暂态稳定性的措施。首先，建立了电网故障期间采用PSC的构网型换流器的暂态稳定模型。随后，基于相图曲线方法，研究了换流器失稳机理以及电压耦合对暂态同步稳定性的影响，并根据电压耦合作用提出通过动态调节有功功率指令值以提升暂态同步稳定性的控制策略。最后，利用PSCAD/EMTDC搭建某市等值系统电磁暂态仿真模型，验证了不同故障工况下换流器并网系统暂态稳定机理的正确性与稳定增强措施的有效性。
The proportion of the integrated converters using PSC(power synchronization control) in power systems is increasing year by year, but there is a lack of in-depth research on the transient synchronization stability. Therefore, the transient synchronization stability mechanism of integrated grid-forming converters using PSC is analyzed, and measures to improve the transient stability of the converter are proposed. First, the transient stability model of the grid-forming converters with PSC during grid fault is established. Subsequently, based on the phase diagram curve(PDC) method, the destabilization mechanism of the converters and the effect of voltage coupling on the transient synchronous stability are investigated. Moreover, a control strategy to improve the transient synchronous stability by dynamically adjusting the active power command value is proposed based on the effect of voltage coupling. Finally, the electromagnetic transient simulation model of an equivalent system in a city is constructed by using PSCAD/EMTDC, which verifies the correctness of the transient stabilization mechanism of the converter-connected power system and the effectiveness of the stabilization enhancement measures under different fault conditions.

关键词(KeyWords)： 暂态同步稳定性;功率同步控制;构网型换流器;相图曲线
transient synchronization stability;PSC;grid-forming converter;PDC

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（5211JH2000RW）

作者(Author): 项中明,倪秋龙,李振华,徐建平,李斯迅,张哲任,徐政
XIANG Zhongming,NI Qiulong,LI Zhenhua,XU Jianping,LI Sixun,ZHANG Zheren,XU Zheng

DOI: 10.19585/j.zjdl.202309010

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