抽水蓄能机组停机过程仿真及优化

抽水蓄能机组出口断路器通过合、分闸操作来控制抽水蓄能机组的启停及运行工况的切换,影响着抽水蓄能系统的运行情况;抽水蓄能机组出口断路器开断电流的大小决定其触头损耗的多寡,开断电流的减少可减缓断路器的损耗,延长其使用周期。通过建立抽水蓄能机组仿真模型,研究发电与抽水工况停机过程中有功和无功功率对断路器开断电流的影响,根据仿真结果,选取最优电压调节器放大倍数和最小导叶开度,优化停机流程,达到了减少断路器开断电流的目的。

Simulation and Optimization of Pumped-Storage Unit Shutdown Process

The circuit breaker of pumped storage unit can control the generator startup or shutdown and change the operation conditions, which has impact on the operation of pumped storage systems. The decrease of the breaking current of the generator circuit breakers can reduce their electrical wear of the contact, hence prolonging their service life. Therefore, we establish the simulation model of the pumped-storage unit to study the method of how to reduce the breaking current of generator circuit breakers during the shutdown process. We also do researches about the connection between electric power and breaking current under the generation and pumping conditions. The results show that the breaking current can be cut down through changing the voltage regulator amplification factor, minimizing the opening of the guide vane and optimizing the shutdown process of the generator.