张安龙,翟学,李艳,林涛,吴俊鹏,陈汝斯.含光伏电源的配电网故障定位策略研究[J].电测与仪表,2015,52(16):. ZHANG Anlong,ZHAI Xue,LI Yan,LIN Tao,WU Junpeng,CHEN Rusi.Research on Fault Location Method of Distribution Network With PV[J].Electrical Measurement & Instrumentation,2015,52(16):.
含光伏电源的配电网故障定位策略研究
Research on Fault Location Method of Distribution Network With PV
Fault location of distribution network based on monitoring of voltage sag has become a hot research topic. With the development of smart grid, photovoltaic power (PV) is gaining more and more applications. The structure of distribution network with PV is different from the traditional radial distribution systems. Meanwhile, there is a great deal of variation in the fault current of PV and synchronous generator. Therefore, fault location based on monitoring of voltage sag will bring large error when applied in distribution network with PV. In order to solve the problem of fault location for distribution systems with PV, fault current characteristics of PV is studied with a control strategy for low voltage ride through (LVRT), then the calculation method of fault voltage of distribution network with PV is put forward. The theory of fault locating proposed is to search the assumed fault bus which makes the fault voltage measured is in agreement with the calculation value. Then the bus which is closest to fault position is obtained. Finally, a case study based on IEEE-34 node system is conducted to prove the correctness and effectiveness of the proposed method.
