Three-phase power balance device and control system based on fpga control

Abstract

The invention relates to a three-phase power balance device based on FPGA control and a control system. The device comprises a system power Uabc, an output reactor Labc, a three-phase full-bridge inverter unit, a capacitor C1, a capacitor C2, a null line reactor LN and a null line N, wherein the system power Uabc, the output reactor Labc and the three-phase full-bridge inverter unit are sequentially connected, the capacitor C1 and the capacitor C2 of the three-phase full-bridge inverter unit are connected in serial, the middle point of the capacitor C1 and the middle point of the capacitor C2 are connected with the null line reactor LN, and the null line reactor LN is connected with the null line N. A voltage mutual inductor is connected between the system power Uabc and the output reactor Labc, an output current mutual inductor is connected between the output reactor Labc and the three-phase full-bridge inverter unit in a penetrating mode, the two ends of the capacitor C1 and the two ends of the capacitor C2 are connected with a direct-current mutual inductor, the voltage mutual inductor, the output current mutual inductor and the direct-current mutual inductor are connected with a regulating circuit through a regulating circuit interface, the regulating circuit is connected with an FPGA through an AD sampling chip, and the FPGA is connected with an ARM and a DSP. The power quality problems of three-phase load unbalance and excessive null line current in a power distribution network can be effectively eliminated, output compensation precision is improved, the compensation effect is good, and system reliability is high.

Description

technical field [0001] The invention relates to a three-phase power balance device, in particular to an FPGA-based three-phase power balance device and a control system. Background technique [0002] With the increasing complexity of the power grid and the increase of nonlinear and impact loads, problems such as reactive power, harmonics, and unbalanced three-phase loads in the distribution network are becoming more and more serious. At present, the three-phase current balance equipment on the market, especially the high-power three-phase active power balance equipment, is still dominated by passive reactive power compensation device phase-separated compensation, and a small number of active power filters and static wireless power filters that have higher requirements for installation conditions. Power generators, and are mainly used in the low voltage range. However, the passive reactive power compensation device itself has great defects and cannot meet the optimal unbalan...

AI Technical Summary

Problems solved by technology

However, the passive reactive power compensation device itself has great defects and cannot meet the optimal unbalance requirements. Compared with the reactive power compensation device, the three-phase load unbalance automatic adjustment device has the functions of active power transfer, dynamic reactive power compensation, and Advantages such as system non-resonance

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