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国内新建的 5 0 0kV变电所 ,二次设备下放到高压开关场 ,变电所计算机监控系统采用按站级控制层、间隔控制层分散布置 ,其供电方式相应按小室独立供电。站级控制层由不同母线引入 2路交流电源 ,经隔离变至UPS后输出单相三线电源至各用电设备。间隔层设备多采用直流供电 ,将直流电压调制成交流电压后 ,输出单相三线电源。为确保供电电源质量 ,防止瞬态过电压及外界干扰 ,采用屏蔽、隔离、滤波、避雷、加装浪涌吸收器等措施
The newly built substation and substation in China have been transferred to the high-voltage switchyard. The substation computer monitoring system adopts the station-level control layer and the interval control layer. The power supply mode is independently powered by the cab. Station-level control layer by the introduction of two different bus AC power, after the change to the UPS output single-phase three-wire power supply to the power equipment. Interval equipment and more use of DC power supply, the DC voltage modulation into AC voltage, the output single-phase three-wire power. To ensure the quality of power supply, to prevent transient over-voltage and external interference, the use of shielding, isolation, filtering, lightning protection, installation of surge absorbers and other measures