Solution

in recent years, my country's port enterprises have adopted a large number of silicon-controlled rectifier and silicon-controlled inverter equipment. this results in a serious reduction in the quality of power supply and distribution. what is even more serious is the series or parallel resonance formed under certain conditions between the high-order harmonics generated by these devices and the system capacitance and system impedance in the power supply and distribution network, resulting in system some equipment was seriously damaged. the harm of harmonics to the power supply and distribution system of ports has attracted people's attention. it is urgent to suppress harmonics and improve the quality of power supply and distribution.

due to the use of high-speed changing loads such as door operators at a port, ordinary reactive power compensation devices cannot be used for power factor compensation. harmonics flow through cables and transformers, causing increased losses. users have increased active power losses and need to pay more electricity bills. and there will be an interest rate penalty of 10,000-20,000 yuan every month. as the country vigorously advocates energy conservation, consumption reduction, technology and environmental protection, the port has invested timely funds to improve power quality.

after the port installed a dynamic anti-harmonic reactive power compensation device, the average power factor reached above 0.95, the amount of harmonics was greatly reduced, the energy saving effect was obvious, and the power supply quality of the system was greatly improved.

scheme diagram reference