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中文摘要：
针对大量光伏电站接入电网,重点从光伏电站的电源特性对现有继电保护的动作特性方面展开研究。在综合稳定程序（PSASP）中建立了光伏电站系统暂态模型以及送出线路模型,分析了光伏电站发电系统的故障电流特征。在此基础上分析了光伏电站发电系统对送出线路光伏侧继电保护动作特性的影响,并提出了相应的保护配置建议。为分析和预测在现有大系统中增加光伏发电系统后对电网的影响等提供了有力的技术支持。
英文摘要：
For a large number of photovoltaic （PV） power stations connected to power grid, the action features of the current relay protection are mainly studied as viewed from the characteristics of power supply of PV power station. The transient model of PV power station system and the model of transmission lines are established in the comprehensive stability program （PSASP）, and the fault current characteristics of PV power generating system are analyzed. On this basis, the influence of PV power generating system on the action features of relay protection in PV side of transmission lines is analyzed, and some suggestions for the corresponding relay protection allocation are proposed, which provides a strong technical support for analyzing and predicting the impact on power grid after increasing PV power generating system in the existing system.
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