The main load equipment is the frequency converter. Because of the large harmonic current (especially the 5 and 7 harmonics) produced by the load, the voltage and current of the system will be distorted, which will affect the normal operation and safety production of the equipment. The input side of the inverter is a nonlinear rectifier circuit, which affects the waveform of the power supply. The output side voltage, current, non sinusoidal or incomplete sine wave is rich in harmonics. Because of the high-power diode rectifier and high-power transistor inverting, the result is to generate higher harmonic currents in the input and output loop, interfere with the power supply system, load and other adjacent electrical equipment. In the actual use process, frequent frequency converter harmonic interference problem. The load of a part frequency converter fluctuates with the working condition, and the reactive power and harmonics are also fluctuated dynamically, which increases the difficulty of reactive power compensation and harmonics.
The JKWF-18F type dynamic reactive power compensation controller, YBYTSC type dynamic compensation regulator, YBYXKL tuned reactor and BKMJ capacitor are selected to assemble dynamic tuning compensation device.
After the tuning compensation device is put into operation, the harmonic content reaches the national standard, which ensures the safe operation of the equipment and the power grid. The power factor of the compensation point is over 0.95. After the device is put into operation, the harmonic current is effectively reduced, the temperature rise of the transformer is reduced, and the safe operation of the equipment is ensured.