大型水轮发电机主保护定量化设计过程的合理简化

Rational Simplification of Quantitative Design Process of Main Protection for Large-sized Hydro-generator

以三峡右岸(哈电机组)、龙滩、小湾、构皮滩(东电机组)、金安桥、拉西瓦、彭水电站的7台大型水轮发电机的主保护设计为例,说明多分支大型水轮发电机应根据每相分支数(偶数或奇数分支)和故障特点的不同来实现主保护定量化设计过程的合理简化,即偶数(或奇数)多分支水轮发电机主保护的设计过程可归纳为一个每相2分支(或3分支)的水轮发电机主保护配置方案的设计,其分支的合理分组(相邻或相隔方式)取决于发电机实际可能发生的内部故障特点。相关设计规则的总结大大减少了设计计算的工作量。

With the main protection designs of seven hydro-generators in Three Gorges Right Bank, Longtan, Xiaowan, Goupitan, Jinanqiao, Laxiwa and Pengshui power stations as examples, the design process of hydro-generators with even or odd branches can be reduced to the main protection design of hydro-generators with two or three branches per phase and the branches per phase are reasonably grouped according to the possible fault features of different hydro-generators, such as adjacent or alternating modes. The summary of corresponding design rules directs the quantitative design for main protection configuration scheme, which greatly reduces the computation workload.