大型多分支绕组水轮发电机动态模拟研究

大型多分支绕组水轮发电机内部结构的复杂性，增大了对其自身和保护等问题的研究难度，动态模拟系统可以保持原型系统的物理本质，因此采用动态模拟试验可以对大型多分支绕组发电机进行有效的研究。文章介绍了以一台具有多分支绕组结构的凸极水轮发电机为主构成的动态模拟试验系统，并且模型发电机的内、外电气特性与原型机基本一致。采用该模型系统对发电机单元件横差不平衡电流、内部故障主保护的性能以及注入式定子接地保护进行了研究和测试，其结果可为故障分析、保护原理、保护配置、定值整定和保护性能测试等问题的研究提供依据，并可对数字模拟试验和原型试验的结果起到验证和补充作用。

Dynamic Simulative Research on Large Hydro-Generator With Multi-Branch Winding

The complexity of internal structure of large hydro-generator with multi-branch winding makes the research on the generator itself and its protection more difficult. Because dynamic simulative system can keep physical nature of the prototype system, so large hydro-generator with multi-branch winding can be effectively researched by dynamic simulative test. In this paper a dynamic simulative system mainly constituted by a salient hydro-generator with multi-branch winding is presented while the internal and external electrical characteristics of the adopted generator model are basically accordant with those of the prototype hydro-generator. Using this model system, the unit transverse differential current of the generator, the internal fault protection performance and stator ground fault protection with low frequency voltage injection are studied and tested, and the results are available for reference to the researches on fault analysis, protection principle, protection configuration, protection setting and protection performance testing as well as it can also be used to verify and supplement the results from digital simulation test and prototype test.