Control method for schedulable wind-solar-diesel storage independent microgrid based on droop control

Abstract

The invention relates to a control method for a schedulable wind-solar-diesel storage independent microgrid based on droop control. The independent microgrid comprises a direct current power supply system and an alternating current power supply system. According to the control method, the coordinated control of the direct current power supply system mainly depends on energy management of a local coordinated controller together with the control of an underlying device DC / DC converter; the alternating current power supply system uses the droop control to participate in regulating the voltage andfrequency of an island microgrid system. The method can effectively stabilize the accuracy of the magnitude of common direct current bus voltage, achieve non communication control between power sources, and achieve frequency and voltage control; a basis is provided for independent micro power grid control. The control method can be widely used in the control of independent microgrid control.

Description

technical field [0001] The invention relates to a microgrid control method, in particular to a control method for a schedulable independent microgrid of wind, diesel and storage, and belongs to the field of independent microgrid control analysis. Background technique [0002] Energy issues have attracted more and more international attention. With the gradual reduction of traditional energy sources and the increasing environmental pollution, the distributed generation technology (Distributed Generation, DG) that uses renewable energy for power generation has become more and more popular. widespread attention around the world. The transmission loss of distributed energy is very small, which can significantly reduce the dependence on the large power grid, and can meet the various power consumption needs of users in the region, making up for the large-scale power plant, multi-layer power grid, heating boilers, and household air conditioners. Insufficiency of the traditional ur...

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Problems solved by technology

[0004] The independent microgrid of wind, diesel and diesel storage is composed of photovoltaic system, wind power system, energy storage system and diesel engine. When the network structure or load changes, how to coordinate and control each micro-power supply to ensure that the system can operate normally in various operating modes and meet the power demand of the load is the key to the safe and stable operation of the micro-grid system. In the independent micro-grid of wind, diesel and storage, how to switch between traditional energy diesel generators and clean energy (photovoltaic, wind and energy storage), how to distribute load between energy sources, and how to ensure smooth and safe operation have not been found in the technology. introduce

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