DEVICE FOR COMPENSATION OF VOLTAGE AND REACTIVE POWER OF ELECTRIC NETWORK

摘要

The compensation device includes a booster transformer 3, the primary winding of which is connected between the mains and the load, one side of the primary winding of the booster transformer is connected to the mains via a high-speed switch 1. The first inverter on the IGBT transistors with a PWM system is connected to the secondary winding of the booster transformer through an LC filter 5 control 6, the second inverter on IGBT transistors with PWM control system 12 is connected between the boost transformer and the load through LC filter 11. The DC circuit will include: the first inverter on IGBT transistors with a PWM control system 6, the second inverter on IGBT transistors with a PWM control system 12, a block of supercapacitors 7 for energy storage, and a DC link voltage sensor 8 and DC link current sensor 9. The dual-mode inverter control system 10 receives information about the system status from the DC link voltage sensor 8 and the DC link current sensor 9, from the load voltage sensor 13 through the calculation unit from the declination of the amplitude and frequency of the voltage in the load 14, which is responsible for stabilizing the output voltage. Compensation of reactive power and synchronization with the network is carried out using: a unit for calculating the reactive component of the current of the electric network 4 and a unit for determining the level of voltage drop and synchronization with the frequency and phase of the voltage of the network 2. These units are also connected to the dual-mode control system of the inverter 10. The developed device provides compensation over a wide range of reactive power by the consumed load, it provides a reduction in the level of harmonic distortion, including the loss of input voltage Ia, the input and output voltage conforms to Russian and international standards in the field of electric power quality. 1il.