Electric power system is composed of electric power generation, power transmission, power transformation, power distribution, power utilization, and etc.
电力系统是由发电、输电、变电、配电和用电等环节组成的电能生产与消费系统。
The power transmission equation of VSC is simplified by coordinate transformation, and the control system for transmitted power of VSC is designed by use of unsymmetrical triggering method.
并通过坐标变换简化了VSC的功率传输方程，还采用不对称触发策略设计了VSC的传输功率控制系统。
With rapid development of power system, the traditional periodical maintenance can not meet the need of secure operation of high voltage equipments for power transmission and transformation.
传统的定期检修已不能满足高压输变电设备安全运行的要求，以状态检修代替定期检修已成为电力系统设备检修的必然趋势。
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