发电机内部故障仿真分析软件的应用实例

PRACTICAL APPLICATION OF INTERNAL FAULT ANALYSIS SOFTWARE TO POWER GENERATORS

过去,由于没有掌握发电机内部短路的正确分析和计算方法,广大设计人员虽然对现行主保护方案设计工作中完全凭概念、经验和传统习惯做法的科学性心存疑虑,也只好沿用传统做法,使主保护设计水平停滞不前,给发电机的安全运行带来严重隐患。现在,发电机内部故障分析软件已经过国家鉴定,有可能也有必要推广主设备主保护设计的新思路和新方法,亦即将主保护方案的性能与发电机实际可能发生的内部短路紧密联系起来,在此基础上,按照“优势互补、综合利用”的原则寻求最佳的主保护配置方案。虽然要求设计人员(包括整定计算的运行人员)花费较多的精力和时间,但可取得高质量的设计成果,以确保发电机的安全运行。

Though many designers are doubtful of the traditional design method of the main protection scheme for power generators, depending on the concept of protection, the experience of the designer and the habitual configuration of other power stations, they have to use it to design the scheme because the short circuit current in the stator winding is not well understood. The past design method may lead to harmful results in operation. Now, the internal fault analysis software for generators, which has passed the state verification, will contribute to the popularization of a new kind of view and method in the design of the main protection scheme for main electric equipment. The main point of the method is that the performance of main protection schemes and the possible internal faults of generators can be closely connected, and the final configuration scheme can be optimized according to the principle of advantage complementation and comprehensive utilization, which means making best use of the advantages of protection schemes and bypassing their disadvantages. High quality design can be achieved, which is beneficial to the safe operation of the generator, even though more time and efforts are needed in the design process by use of the new design method.