Distribution network peak load shifting distributed energy storage power distribution and coordination control method

A technology of distributed energy storage and peak shaving and valley filling, which is applied in the direction of AC network load balancing, etc., and can solve problems such as overloading and difficulties of distribution transformers

Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0002] With the increasing demand for urban power, distribution transformers are often overloaded in areas with high load density in urban centers. Changes in the social power consumption structure and rapid load growth have also increased the load

Method used

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  • Distribution network peak load shifting distributed energy storage power distribution and coordination control method
  • Distribution network peak load shifting distributed energy storage power distribution and coordination control method
  • Distribution network peak load shifting distributed energy storage power distribution and coordination control method

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Embodiment

[0054] Such as figure 1 , set the discharge starting power of the energy storage battery (the peak value of the combined output of the energy storage system) Pmax and the charging starting power (the low value of the combined output of the energy storage system) Pmin. state; when the load is lower than the charging start-up power, the energy storage battery operates in the charging state, thus playing the role of shifting peaks and filling valleys and reducing the difference between peaks and valleys of load.

[0055] The flow chart of the specific implementation steps of the present invention is as figure 2 shown, including:

[0056] (1) Obtain the total regulation power of energy storage;

[0057] Calculate the peak and valley values ​​of the load in the area, and set the valley value P of the combined output of the energy storage system according to the peak and valley values ​​of the load min and peak P max , compare the load power and P min ,P max size, when the lo...

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Abstract

The invention relates to a distribution network peak load shifting distributed energy storage power distribution and coordination control method which comprises the steps that (1) the total adjusting power of distributed energy storage system peak load shifting is determined; (2) a power distribution strategy of a similar distributed energy storage system is determined; (3) power distribution strategies of a distributed mixed energy storage system at different time scales are determined; and (4) the distributed mixed energy storage system is subjected to coordination control. Distribution network peak load shifting is achieved, the peak valley difference rate meets the requirement, charging-discharging power distribution and control based on an energy-storage system real-time state are achieved, over charging and over discharging are avoided, coordination control of different kinds of energy-storage systems is achieved, and the adjusting requirements of different network distribution time scale loads are met.

Description

technical field [0001] The invention relates to an energy storage operation control technology, in particular to a distributed energy storage power distribution and coordinated control method for peak-shaving and valley-filling of urban power distribution networks. Background technique [0002] With the increasing demand for urban electricity, distribution transformers are often overloaded in areas with high load density in urban centers. Changes in the social power consumption structure and rapid load growth have also increased the load peak-to-valley difference. From construction costs and From the perspective of resource protection, it is becoming more and more difficult to meet the demand of peak load with traditional new power generation, transmission and distribution equipment. In order to solve the problem of fast-growing power load and relatively lagging power grid construction, the introduction of energy storage into the power distribution system can not only effect...

Claims

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Application Information

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IPC IPC(8): H02J3/28
Inventor 桑丙玉叶季蕾杨波陶琼张宇许晓慧薛金花汪春朴红艳刘舒
Owner STATE GRID CORP OF CHINA
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