大型发电机主保护配置方案的优化设计

Optimum design of main protection configuration scheme for large generators

为保证大型发电机组的高质量安全运行,提出了主保护配置方案的优化设计方法。通过对5台不同绕组形式水轮发电机主保护设计实例的归纳总结,发现应在内部故障全面仿真计算的基础上,根据发电机绕组结构的不同而采取不同的优化设计过程。基于定量化设计的优化设计过程纠正了工程界以容量相等或相近为理由而互相搬用主保护配置方案的错误做法。该方法兼顾了设计的科学性和实用性,已在一系列大型机组主保护的设计中得以验证。

For supplying high-grade assurance for the safe operation of large generators, an optimum design method was developed for the main protection configuration scheme. Different optimum design processes are needed for five generators used in Three Gorges, Pingban, Baise, and Fengtan dams due to their different winding design. The optimum design is based on the overall simulation of internal faults, which differs from traditional design methods that different types of generators with similar capacities usually use the same protection configuration schemes. In the optimum design process, scientific and practical requirements are met simultaneously. The presented method has been verified by the main protection designing for a series of large generators.