600MW火电机组厂用电相角差分析与仿真

Analysis and Simulation of Angle Difference of 600 MW Thermal Unit Auxiliary Supply

600MW火电机组的厂用电与一般机组有较大差异,在厂用电切换过程中可能存在较大相角差。为保证机组厂用电合理可靠和设备安全,从理论上分析了影响相角差的主要因素有电网结构、系统运行方式和电压水平;以阳逻电厂三期工程为例,通过仿真计算验证了理论分析的结论,并定量给出了在各种电网结构和运行方式下的相角差。对今后600MW火电机组厂用电设计、运行有一定借鉴作用。

For 600MW thermal power unit, there is generally a larger angle difference than other thermal unit during unit auxiliary supply switching. To ensure a reliable switching and the equipment safety, such factors as grid structure, operation mode and system voltage level are discussed in this paper. As a example simulation on No.3 Yangluo thermal power plant is also presented.The analysis ard simulation can be used for reference on design and operation of 600MW thermal power unit auxiliary supply.