王峰;刘天琪;丁媛媛;曾琦;李兴源;

• 1:四川大学电气信息学院

摘要(Abstract)：

高压直流系统闭锁引起的暂态过电压对输电设备及系统稳定性均产生巨大冲击,目前,相关研究缺乏定量的分析方法。针对该问题,首先提出了一种计及系统稳态传输功率的交流系统等值方法,从而得到交流系统的2个重要参数(即等值电抗和等值电势)。在此基础上,考虑暂态过程中换流站剩余无功容量及其补偿容量随电压升高的特性,推导了换流母线暂态电压的解析表达式,从而得到了暂态过电压的定量计算方法,并分析了其影响因素。研究表明,系统强度越弱,暂态电压越高,而且随着闭锁容量的增加,暂态过电压呈非线性上升趋势,而闭锁容量和等值电势与暂态过电压呈负相关关系。基于BPA的南方电网2030年规划数据仿真分析验证了所提方法的正确性和有效性。

关键词(KeyWords)： 高压直流;暂态过电压;短路比;影响因素;故障分析;机理分析

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技项目“宁夏多之流送端电网机电-电磁混合仿真方法研究(SGNXDQOOBGJS160021)”~~

作者(Author): 王峰;刘天琪;丁媛媛;曾琦;李兴源;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.10.019

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