Multifunctional centralization type wind-solar complementary power generation system grid-connected controller

Abstract

The invention belongs to the technical field of wind power and solar energy grid-connected power generation, and particularly relates to a multifunctional centralization type wind-solar complementarypower generation system grid-connected controller. The controller comprises a power main circuit and a control circuit, wherein the power main circuit is characterized in that the input end and the output end of a maximum power tracking circuit are independently connected with a photovoltaic array and a change-over switch, the input end and the output end of a fan unloading circuit are independently connected with a fan output end and the change-over switch, the wiring terminal of the change-over switch is simultaneously independently connected with the charging and discharging control circuitand the direct-current load of a storage battery and the input end of the DC (Direct Current) / AC (Alternating Current) inverter circuit, the charging and discharging control circuit end of the change-over switch is connected with the storage battery, the output end of the DC / AC inverter circuit is connected with a power grid, and a main connection line between the DC / AC inverter circuit and the power grid is connected with an alternating current load. The control circuit adopts a dual-core processor, a controller core adopts the combination of a single chip microcomputer and a DSP (Digital Signal Processor), and a serial port communication way is adopted for connection. The controller has the advantages of high integration degree and good grid-connected effect and is suitable for a grid-connected wind-solar complementary power generation system.

Description

technical field [0001] The invention belongs to the technical field of wind power and solar grid-connected power generation, and in particular relates to a multi-functional centralized wind-solar complementary power generation system grid-connected controller. technical background [0002] At present, most of the power generation and grid-connected process of the wind-solar hybrid power generation system is structured in that the Prime Minister obtains the direct current generated by wind and solar energy through the wind-solar hybrid controller, and then under the control of the grid-connected controller, the inverter is used to convert the The direct current is converted to alternating current, which is connected to the grid. This method requires independent wind-solar hybrid controllers, inverters, and grid-connected controllers in structure, and the connection and control of the system are complicated, and the overall cost is high; in terms of response speed, the structu...

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Problems solved by technology

This method requires independent wind-solar hybrid controllers, inverters, and grid-connected controllers in structure, and the connection and control of the system are complicated, and the overall cost is high; in terms of response speed, the structurally complex connection and control make the system The response speed is also affected by this; in terms of function, the maximum power tracking problem of the photovoltaic array, the unloading problem of the fan when the power is large, the charging and discharging control problem of the battery pack, the connection and removal of the load and the problem of anti-islanding effect cannot be solved. Comprehensive coordination and resolution

At present, the commercially available grid-connected control devices for wind-solar hybrid power generation systems mainly focus on the research of independent sub-devices such as wind-solar hybrid controllers, grid-connected controllers, and inverters. The controller is still in the research stage

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