The practical examples are given to analyze and illustrate the effect of the harmonics and negative sequence on large hydro generators.
通过实例计算，分析和说明了电力系统谐波和负序对大型水轮发电机的影响。
2
The invention relates to a method for preparing negative temperature coefficient heat-variable powder body-the method of hydro-thermal chemical reaction.
本发明涉及一种负温度系数热敏粉体的制备方法――水热化学反应的方 法。
3
Hydro project construction will impose a certain negative impact on environment.