一次消谐：是由它本身特点才决定的，可以用来消除电网中产生的谐振，限制单相接地或电弧接地时流过高压互感器的过电流。 One time harmonic elimination: It is determined by its own characteristics and can be used to eliminate resonance generated in the power grid, limit overcurrent flowing through high-voltage transformers when single-phase grounding or arc grounding occurs. 微机消谐：实时监测电压互感器PT开口三角处电压和频率，自动显示记录铁磁谐振发生时间及相关参数，可区分铁磁谐振、过电压、单相接地、当系统发生单相接地或谐振、装置故障、故障时产生报警信号，具有通信功能，可上报中央机房，适用于无人值守变电站。 Microcomputer resonance elimination: Real time monitoring of the voltage and frequency at the PT opening triangle of the voltage transformer, automatic display and recording of the occurrence time and related parameters of ferromagnetic resonance, distinguishing between ferromagnetic resonance, overvoltage, single-phase grounding, single-phase grounding or resonance in the system, device failure, and generating alarm signals when faults occur. It has communication function and can be reported to the central computer room. It is suitable for unmanned substations. 电压互感器：1、电压互感器把高电压按比例关系变换成100V或100/3V标准二次电压，供计量、仪表装置和继电保护使用；2、可以将高电压与电气工作人员隔离，保证设备和人身安全的作用。 Voltage Transformer: 1. The voltage transformer converts high voltage into 100V or 100/3V standard secondary voltage in a proportional relationship for use in metering, instrumentation, and relay protection; 2. It can isolate high voltage from electrical workers to ensure the safety of equipment and personnel.