多馈入直流受端电网动态无功补偿选址研究

Study on the Site Selection for Dynamic VAR Compensation of Receiving-end Grid with Multi-infeed HVDC Transmission Systems

随着大容量直流输电的广泛应用,若动态无功功率储备不足,当发生直流闭锁等严重故障时,系统面临暂态电压失稳风险。提出综合电压涨幅指标法研究多馈入直流受端电网的动态无功补偿选址问题。通过系统电压弱区域分析和时域仿真,结合静止无功补偿器(SVC)的响应指标和容量等参数确定SVC的最优安装地点。对大规模交直流混联系统仿真结果验证了所提方法的有效性和工程实用性。

With wide usage of large capacity HVDC transmissions, AC/DC hybrid power system faces the problem of transient volt- age stability after DC lines block without adequate dynamic reactive reserves. This paper proposes a composite voltage makeup-based method to search the optimal locations of Static VAR Compensator （SVC） for the receiving-end power grid of malti-infeed HVDC transmission system, which combines weak region analysis and time domain simulation for fault response performance with SVC. The computing results of a large-scale practical system validate the effectiveness and engineering value of the proposed method.