Fault Identification Method of New Energy Transmission Line Based on Controllable Series Reactance
For new energy transmission lines without shunt re-actors,whether the fault nature can be correctly distinguished is the top priority to ensure the safe and reliable operation of the new energy system.In order to reduce the impact of new en-ergy transmission line faults on power equipment and systems,improve the success rate of reclosers,and reduce the problem of new energy power generation systems off the grid.A new fault identification method based on controllable series reactance and current information was proposed.When transmission line is fault,serial controllable current limiting reactor is designed,come controlled reactance to use when fault phase trip occurs.Based on the small current difference between instantaneous fault and permanent fault of the system in reactance series line,the comparison criterion of current mutation quantity was es-tablished to determine the time when the fault arc goes out,and a new fault property identification strategy for new energy sta-tion transmission line was constructed.The identification res-ults are fast and reliable,and it can effectively improve the line coincidence rate in the new energy station transmission line project.
new energy transmission linecontrollable series reactanceinstantaneous faultpermanent faultarc extin-guishing determination
国家科技期刊平台
NSTL
万方数据
维普
