Voltage drop increases, tripping due to transfinite voltage protection and frequency protection;
Protection malfunction, heating and aging of transformer and cable, reduction of insulation, cable outlet overload caused by harmonics;
The increase of neutral current reduces the power grid voltage;
Low power factor, low power utilization
ZAPF-200/380-BM modular active power filtering device of SSE was selected.
Fast response of ZAPF active filtering device filtered the harmonics generated in the system, reduced the current in the neutral line, stabilized the voltage and purified the grid, so as to improve the quality of communication power supply system and ensure the smooth communication.