Control system diagram of reactive power automatic compensation cabinet. The integration of reactive power compensation and power grid monitoring can not only compensate reactive power loss in the power grid, improve power factor, reduce line loss, thus improving the load capacity and power supply quality of the power grid; At the same time, it can also monitor the three-phase voltage, current, power factor and other operating data of the power grid in real time, and complete the monitoring, analysis and processing of the entire low-voltage distribution line