Ningbo Grid Black Start Program

Black start and restoration of power systems following a complete or partial blackout is an area of major concern for all power utilities due to the high financial and social implications involved. In recent years, due to economic competition and deregulation, power systems are operated closer and closer to their limits. At the same time, power systems have increased in size and complexity. Both factors increase the risk of major power outages. After a blackout, power needs to be restored as quickly and reliably as possible, and consequently, detailed restoration plans are necessary.This task has an introduction of fundamental precept of Zhejiang electrical power system black start, and advances three doable projects of Ningbo electrical net basing of restoration principle after Zhejiang province power system blackout. Some important problems are discussed and studied in the task. These issues must be concerned by power station during the first step of black start.Some problems might apprea during black start. These issues are simulated and calculated used by PSASP software. And give a concolution to answer some questions. Such as if it will be caused self exciting, if the generator has sufficient capability receiving income reactive power, if it will cause over-voltage when offline wire charged, if it will take place low-frequency oscillation during the first stage of black start, if it will cause voltage and frequency decline during motor starting. Meantime the task provides the method to resolve these problems.It gives some simple introduction of gas turbine that possess significiant position in the black start schemes. The task brings forward the methds of shortening starting time.At last it gives detail opration schemes of three kinds of black start project. It can be used for site directly.