The frequency variation of electrical power system would have effect the veracity of electric parameter evaluation, and possibility effect characteristic of automatic equipment.
工频频率变化会影响电量计算的准确性，甚至会影响到电力自动化装置的工作性能。
This paper introduces the electric principle, technical parameter, performance characteristic and configuration form of auxiliary electrical system for HXD2 type AC driven freight electric locomotive.
在指出火电厂辅机系统现有流量调节方式缺点的基础上，将高压变频调速控制相对传统调速方式的节能原理进行详细的比较分析。
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