Parallel control system and method based on two-way inverter control and inverter

Abstract

The invention belongs to the technical field of inverters, and discloses a parallel control system and method based on two-way inverter control and an inverter. The parallel control system based on two-way inverter control includes a photovoltaic power supply module, a parallel voltage detection module, a parallel current detection module, a main control module, a start module, a parallel module,a heat dissipation module, a fault diagnosis module and a display module. Through the start module, the existing problem that a two-way inverter cannot be started normally when the output voltage of aphotovoltaic array is higher than the allowable working voltage of the two-way inverter is solved, and high-voltage start of the two-way inverter is realized without increasing the system cost. Because the fault diagnosis module does not carry out complex mathematical transformation, the algorithm complexity and time complexity of the diagnosis method are reduced, and the dependence on the hardware of the fault diagnosis system is reduced. According to the experimental data, the method can greatly reduce the problem of parallel fault diagnosis delay and improve the diagnosis efficiency.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a parallel control system and method based on bidirectional inverter control, and an inverter. Background technique [0002] At present, the closest existing technology: the inverter is a device that converts DC power (battery, storage battery) into AC power (generally 220V, 50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVD, VCD, computers, TVs, washing machines, range hoods, refrigerators, VCRs, massagers, fans, lighting, etc. In foreign countries, due to the high penetration rate of automobiles, the inverter can be used to connect the battery to drive electrical appliances and various tools to work when going out to work or travel. The car inverter output through the cigarette lighter is 20W, 40W, 80W, 120W to 150W power...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the existing parallel control process based on bidirectional inverter control cannot realize the normal start-up of the inverter and reduce the working efficiency of the system; In the diagnosis process, the method of data analysis is often used to extract eigenvalues, which not only increases the hardware cost requirements of the system, but also delays the diagnosis time.

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