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Stable frequency control method and system of microgrid

A frequency stabilization and control method technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve the problems of stable control of micro-grid frequency fluctuations, unfavorable micro-grid frequency, etc., and achieve the effect of stable control

Inactive Publication Date: 2015-11-18
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] Based on this, it is necessary to provide a micro-grid frequency stabilization control method for the technical problem that the micro-grid frequency stabilization control method in the prior art is not conducive to the stable control of frequency fluctuations in different ranges of the micro-grid.

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  • Stable frequency control method and system of microgrid
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  • Stable frequency control method and system of microgrid

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Embodiment Construction

[0028] In order to further illustrate the technical means adopted by the present invention and the achieved effects, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

[0029] like figure 1 as shown, figure 1 It is a flowchart of a microgrid frequency stabilization control method according to an embodiment of the present invention, a microgrid frequency stabilization control method, including:

[0030] Step S101: Divide the microgrid into several frequency fluctuation regions according to the frequency fluctuation range, and set corresponding frequency stabilization control schemes for each frequency fluctuation region.

[0031] Since different frequency fluctuation ranges have different influences on the microgrid, in this step, the microgrid is divided into several frequency fluctuation regions according to the frequency fluctuation range, and corresponding...

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Abstract

The invention relates to a stable frequency control method and system of a microgrid. The method comprises: a controller of a micro source collects a frequency value of a bus of a microgrid in real time; according to the frequency value and a preset frequency fluctuation zone, a frequency fluctuation zone where a bus frequency is located is determined; on the basis of the frequency fluctuation zone, a corresponding stable frequency control scheme is obtained; and the bus frequency of the microgrid is controlled stably based on the stable frequency control scheme. According to the method and system, the frequency value of the bus of the microgrid is collected in real time by the controller of the micro source and the a frequency fluctuation zone where the bus frequency is located is determined based on the frequency value and the preset frequency fluctuation zone; and according to the determination result and preset control schemes of different frequency fluctuation zones, coordinated control of the micro source, the energy storage system, and the load is realized, so that the fluctuated frequency can be restored rapidly for stability. And thus stable control of frequency fluctuation of the microgrid at different ranges can be realized.

Description

technical field [0001] The invention relates to the technical field of power grid stability control, in particular to a method and system for frequency stability control of a micro-grid. Background technique [0002] Microgrid is a new type of network structure, which is a group of small power generation and distribution systems that integrate micro power sources, loads, energy storage systems and control devices. Microgrid is a concept relative to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads according to a certain topology, and is connected to the conventional distribution network through static switches. As the link between the distribution network and distributed power, the microgrid makes it unnecessary for the distribution network to directly face different types, large quantities, scattered access or even intermittent distributed power, and is an effective way to access distributed energ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/28
Inventor 许爱东郭晓斌李鹏雷金勇喻磊田兵吴争荣杨苹周少雄
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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