Research on the Effect of 500 kV UPFC in Southern Suzhou on Distance Protection and the Countermeasures
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摘要:
在苏州南部地区接入统一潮流控制器(unified power flow controller,UPFC)可以提升电网供电能力,但是UPFC的接入会对输电线路保护的可靠性、选择性和灵敏性产生影响。文中基于500 kV苏南UPFC工程,结合线路故障后UPFC系统的控制保护逻辑,通过建立含UPFC的电力系统故障等值模型,分析了UPFC接入对线路两侧距离保护动作特性的影响并提出应对性策略。
Abstract:
It is conductive to improve the power supply capacity of power grid in the southern part of Suzhou based on unified power flow Controller (UPFC).However,the integration of UPFC has an impact on the reliability,selectivity and sensitivity of transmission line protection.In this paper,the fault equivalent model of 500 kV UPFC in Southern Suzhou is built combined with the control and protection logic after line fault,then the influence on distance protection action is analyzed,as well as the coping strategies are proposed.
