Wind/solar hybrid generation system net-connected controller and change-over switch switching method thereof

Abstract

The invention relates to a wind/solar hybrid generation system net-connected controller and a change-over switch switching method thereof, belonging to the technical field of wind power and solar net-connected generation. The wind/solar hybrid generation system net-connected controller comprises a photovoltaic array, a wind generating set, a maximum power tracking circuit, a fan unloading circuit, a direct-current/alternating-current inverter circuit and a control circuit, wherein the control circuit comprises a singlechip microcomputer, a DSP (Digital Signal Processor), a PWM (Pulse Width Modulation) driving circuit, an SPWM (Sinusoidal Pulse Width Modulation) driving circuit and a serial port communication module; the net-connected controller also comprises a change-over switch circuit;the control circuit also comprises a latch, a digital/analog conversion chip, a data selector, an analog/digital conversion chip, a decoder and a circuit breaker driving circuit. The net-connected controller disclosed by the invention has the advantages of integrated whole structure, simpleness in operation, greatly-reduced design cost, good universality, strong anti-jamming capability of an acquisition module and considerable economic benefit and capabilities of avoiding loss of extra circuits and devices, efficiently measuring and precisely displaying data and ensuring better, efficient andhigh-quality electric quantity conversion and resource utilization of the system.

Description

technical field [0001] The invention belongs to the technical field of wind and solar grid-connected power generation, and in particular relates to a grid-connected controller of a wind-solar complementary power generation system and a switch switching method thereof. Background technique [0002] At present, most of the power generation and grid-connected process of the wind-solar hybrid power generation system is structured by first obtaining the DC power generated by wind and solar energy through the wind-solar hybrid controller, and then using the inverter under the control of the grid-connected controller 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 structurally complex con...

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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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