针对山西北部电网500 k V大同二电厂短路电流超标问题,通过降低其短路水平的计算研究,采取将该500 k V—220 k V变压器(即:5—2联变)断开的方式运行。此方式对大同电网网架影响较大,主要从短路水平、静态安全、暂态安全稳定等方面分析...针对山西北部电网500 k V大同二电厂短路电流超标问题,通过降低其短路水平的计算研究,采取将该500 k V—220 k V变压器(即:5—2联变)断开的方式运行。此方式对大同电网网架影响较大,主要从短路水平、静态安全、暂态安全稳定等方面分析研究了大二电厂500 k V—220 k V变压器(即:5—2联变)断开运行的方式下山西大同电网的安全稳定特性,为山西电网的安全运行提供了理论依据。展开更多
The impact of large-scale grid-connected PV （photovoltaics） on power system transient stability is discussed in this paper. In response to an increase of PV capacity, the capacity of conventional synchronous generat...The impact of large-scale grid-connected PV （photovoltaics） on power system transient stability is discussed in this paper. In response to an increase of PV capacity, the capacity of conventional synchronous generator needs to be reduced relatively. This leads to the lower system inertia and the higher generator reactance, and hence, the power system transient stability may negatively be affected. In particular, the impact on the transient stability may become more serious when the considerable amounts of PV systems are disconnected simultaneously during voltage sag. In this work, the potential impact of significant PV penetration on the transient stability is assessed by a numerical simulation using PSCAD/EMTDC.展开更多
文摘针对山西北部电网500 k V大同二电厂短路电流超标问题,通过降低其短路水平的计算研究,采取将该500 k V—220 k V变压器(即:5—2联变)断开的方式运行。此方式对大同电网网架影响较大,主要从短路水平、静态安全、暂态安全稳定等方面分析研究了大二电厂500 k V—220 k V变压器(即:5—2联变)断开运行的方式下山西大同电网的安全稳定特性,为山西电网的安全运行提供了理论依据。
文摘The impact of large-scale grid-connected PV （photovoltaics） on power system transient stability is discussed in this paper. In response to an increase of PV capacity, the capacity of conventional synchronous generator needs to be reduced relatively. This leads to the lower system inertia and the higher generator reactance, and hence, the power system transient stability may negatively be affected. In particular, the impact on the transient stability may become more serious when the considerable amounts of PV systems are disconnected simultaneously during voltage sag. In this work, the potential impact of significant PV penetration on the transient stability is assessed by a numerical simulation using PSCAD/EMTDC.
