Transient Stability Research And Design For Su Zhou Ba Hydropower Station Connect To The System In Zhuzhou

As an important role of Hun Nan grid,Zhu Zhou grid has developed rapidly in recent years.The stability problem,however,will increasingly prominent,as the grid reach its saturation level.In order to guarantee the power supply reliability of Zhu Zhou grid,Evaluation and Prediction should be taken into account in advance.Su Zhouba hydropower station,which is located in Suzhou village,is built to take full advantage of local rich water resources to a large extent,and has a good role in promoting economic and electricity development.In order to connect to zhuzhou grid,three schemes are designed.Through comparing to each scheme,scheme one is chosen temporary.After stability calculation and analysis by PSASP,the system is consider transient stability.Thus scheme one is chosen the final scheme temporary.By analyzing the 2014 operating data of Zhuzhou grid before the station connect to,the main reason,unreasonable operation mode and heavy load lines,natural disaster is found.According to the new operation mode after the accessing and 2015 operating data of Zhuzhou grid,power flow calculating and analyzing for the entire grid is carried out.By setting faults and analyzing transient stability and short circuit current,the conclusion that the stability is better than before is reached.In response,optimizing operation mode,increasing standby power supply for particular lines or changing the structure appropriately,made the proper measures for bad weather in advance is put forward to improve the grid stability.Thus the reliability of power supply can be guaranteed.In conclusion,the chosen scheme which is designed for Su Zhouba hydropower station connect to Zhuzhou grid match the demand of system stability,power flow,transient stability and short circuit current?Thus,the chosen scheme is the final scheme.