Comprehensive coordination control method of wind-solar direct current micro-grid

A DC microgrid, coordinated control technology, applied in the direction of load balancing in DC networks, can solve problems such as poor stability, and achieve the effect of solving intermittent and improving absorption capacity

Active Publication Date: 2013-02-13
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing wind-solar DC micro-grid with poor stability during operation, the present invention pr

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  • Comprehensive coordination control method of wind-solar direct current micro-grid
  • Comprehensive coordination control method of wind-solar direct current micro-grid

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] refer to Figure 1 ~ Figure 2 , a comprehensive coordinated control method of a wind-solar DC micro-grid, the wind-solar DC micro-grid includes several wind power generators and AC / DC / DC converters, several photovoltaic arrays and DC / DC converters, circuit breakers, I, Class II and III AC / DC loads and DC / AC and DC / DC converters, DC buses, supercapacitor energy storage systems and bidirectional DC / DC modules, battery energy storage systems and bidirectional DC / DC modules, bidirectional AC / DC converters , large power grid, large power grid power dispatching center, coordinating controller, control network connecting the coordinating controller and each specific converter, and communication network connecting the coordinating controller and the large power grid power dispatching center.

[0028] In terms of categories, wind-solar DC microgrids are divided into net...

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Abstract

Disclosed is a comprehensive coordination control method of a wind-solar direct current micro-grid. The wind-solar direct current micro-grid comprises wind driven generator and alternating current (AC)/direct current (DC)/DC converters, photovoltaic array and DC/DC converters, a circuit interrupter, AC/DC load and DC/AC and DC/DC converters, a DC bus, a supercapacitor energy storage system and bi-directional DC/DC module, a storage battery energy storage system and bi-directional DC/DC module, a bi-directional AC/DC converter, a coordination controller, a control network for connecting the coordination controller and the converters and a communication network for connecting the coordination controller and a large power grid power scheduling center, and an operational mode of the wind-solar direct current micro-grid is divided into two categories of a grid-connected mode and an island mode. Stable operation of the wind-solar direct current micro-grid under the grid-connected mode and the island mode is achieved by comprehensively using power scheduling, load scheduling and energy storage device scheduling.

Description

technical field [0001] The invention belongs to the application of wind-solar new energy and DC micro-grid technology, and in particular relates to the technical field of an operation control method of wind-solar DC micro-grid. Background technique [0002] Under the dual pressure of energy shortage and environmental pollution, in recent years, new energy power generation technology has made great progress in research, development and utilization. Among various new energy power generation technologies, wind power generation technology and photovoltaic power generation technology have received much attention attention. However, both wind power generation and photovoltaic power generation have the characteristics of intermittent and volatility, and cannot generate power according to load needs, and the output power fluctuates with changes in weather conditions. Wind and wind power generation equipment is generally composed of power electronic converters, which have no inertia...

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Application Information

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IPC IPC(8): H02J1/14
Inventor 熊远生俞立徐建明
Owner ZHEJIANG UNIV OF TECH
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