Control method for diesel and stored energy coordination of intelligent micro-grid

A control method and micro-grid technology, applied in the direction of electrical components, circuit devices, emergency power supply arrangements, etc., to achieve the effect of improving the utilization rate of new energy, operating economy, and improving safety and stability
CN102916486AActive Publication Date: 2013-02-06ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2013-02-06

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Abstract

The invention belongs to the technical field of an intelligent micro-grid for an electric power system, and relates to a control method for diesel and stored energy coordination of the intelligent micro-grid. Diesel and stored energy coordination is controlled in two modes. In the first mode, diesel and stored energy do not switch with each other, a diesel power generator serves as a main power supply of the system, and the stored energy functions in a PQ manner. In the second mode, the diesel and the stored energy switch, the stored energy functions in the PQ manner when the diesel power generator serves as the main power supply; when the stored energy charges to be the upper limit of SOC(super capacitor state of charge), the main power supply is switched from the diesel power generator into a stored energy system, then the stored energy functions in a VF manner; and when the stored energy discharges to be the lower limit of the SOC, the main power supply is switched into the diesel power generator from the stored energy system. By the control method, problems about steady-state control of the micro-grid are solved, new-energy utilization rate and running economic effect can be improved effectively, and safety and stability of the micro-grid in running are improved.
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Description

technical field

[0001] The invention belongs to the technical field of smart micro-grids in power systems, and in particular relates to a control method for diesel-storage coordination in smart micro-grids. Background technique

[0002] As smart grid technology continues to gain popularity, distributed power supply technology and micro-grid technology have developed rapidly, and micro-grid has therefore become an important supplement and part of the distribution network and plays an important role in user terminals. The so-called micro-grid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads, monitoring and protection devices. Managed autonomous systems. Microgrids are usually composed of distributed power generation (wind, solar, diesel generators, gas turbines, etc.) Due to the high price, the energy storage system usually has limited installed capacity, and it ...

Claims

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