Device and method for optimizing electric energy quality of photovoltaic poverty-alleviation rural power grid based on cooperative self-government

Abstract

The invention relates a device and a method for optimizing electric energy quality of a photovoltaic poverty-alleviation rural power grid based on cooperative self-government. According to the device and the method, the problems that conventional electric energy quality processing devices are relatively single and do not have ideal treatment effect in rural power grids of existing photovoltaic poverty-alleviation projects can be solved. The device comprises electric energy quality coordinating controllers and a single-phase electric energy quality processing device, wherein electric energy quality coordinating controllers are connected to phases A, B and C of a total inlet wire position of a low-voltage area network of rural power grid and are used for detecting electric energy quality information and sending electric energy quality information to a control circuit of the single-phase electric energy quality processing device; and single-phase electric energy quality processing device comprises an inverter circuit and control circuit, an energy storage device is connected to a direct current side of the inverter circuit, an alternate current side of inverter circuit and control circuit are connected with a phase line and a null line in the phases A, B and C, and control circuit is used for detecting electric energy quality information of an access point, simultaneously receiving energy quality information of electric energy quality coordinating controllers and controlling an IGBT (Insulated Gate Bipolar Translator) switch device to output current. According to the device and method, electric energy quality operation level of low-voltage area network is remarkably improved, operation efficiency and economy of a power distribution network are improved, and meanwhile, electric energy quality construction and transformation costs of low-voltage area network are lowered; and device and method are generally applicable to vast rural power networks.

Description

technical field [0001] The present invention relates to the technical field related to power quality control, in particular, to a cooperative and autonomous photovoltaic poverty alleviation rural power quality optimization device and control method, which is an optimization device for comprehensively managing the power quality of photovoltaic poverty alleviation rural power grids And the control method can effectively solve the power quality problem of the rural power grid, significantly improve the power quality operation level of the low-voltage station area, improve the operation efficiency and economy of the distribution network, and at the same time reduce the cost of power quality construction and transformation of the low-voltage station area. Background technique [0002] In recent years, with the continuous investment of State Grid and China Southern Power Grid Corporation in the construction and transformation of distribution network, the power supply reliability an...

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Problems solved by technology

[0008] In order to solve the problem of power quality in the existing photovoltaic poverty alleviation projects in rural power grids, many factors coexist and interact with each other, so it is necessary to take multiple measures in the treatment of power quality, while the functions of

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