Energy storage allocation strategy for active distribution network based on regional prediction error index

An active distribution network and prediction error technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve the problems affecting the practicality and economy of the planning scheme, and the high price of energy storage devices, so as to reduce fluctuations and stabilize The effect of exporting power, reducing power and capacity

Active Publication Date: 2021-03-30
STATE GRID ZHEJIANG ELECTRIC POWER +2
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Problems solved by technology

However, due to the high price of the current energy storage device itself, it affects the practicality and economy of the planning scheme.

Method used

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  • Energy storage allocation strategy for active distribution network based on regional prediction error index
  • Energy storage allocation strategy for active distribution network based on regional prediction error index
  • Energy storage allocation strategy for active distribution network based on regional prediction error index

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The regional control adopts the constant exchange power control mode, the controllable distributed generation power remains unchanged, and according to the definition of the feeder control error (FCE) and the area prediction error index (AFE) under the constant exchange power control mode, the actual value of the area and The magnitude of the deviation between the optimized values ​​is equal to AFE, which represents the relational expression of the deviation between the regional predicted value and the actual value.

[0036] The regional control adopts the constant switching power control mode, and it is necessary to ensure that the actual value of the outlet power is equal to the optimal value. The regional deviation is no longer controlled by the controllable distributed energy resources, its power remains at the optimal power, and the...

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Abstract

The present invention discloses an active power-distribution network energy storage configuration strategy based on a regional prediction error index. The configuration strategy comprises energy storage planning and configuration schemes of a power supply side, a user side and a network side, and the configuration strategy can effectively guide energy storage system site-selection and capacity-determination analysis under different demand conditions. Because the price of the conventional energy storage device is relatively high, the practicality and the economical efficiency of the energy storage device are affected. According to the configuration strategy, the power-distribution network is divided into several control areas, the quantification of the output power and the planned power deviation is realized via the regional prediction error index, and the control algorithm of regional output power and the configuration method of energy storage power and capacity are proposed based on the feeding line control error index under a fixed switching power control mode, so that energy storage power capacity is reduced, and the power fluctuation in the control areas, caused by the prediction error, is suppressed. The configuration strategy can effectively reduce the energy storage configuration capacity and improve the economical efficiency of the overall system planning scheme.

Description

technical field [0001] The invention relates to the energy storage configuration under the active distribution network with large-scale access to distributed energy, in particular to an energy storage configuration strategy for the active distribution network based on the regional prediction error index. Background technique [0002] As more and more distributed power sources are connected to the distribution network, it brings challenges to the operation and control of the power system. The configuration of energy storage system can stabilize the fluctuation of renewable energy output, reduce the randomness of load, improve the utilization rate of renewable energy, and improve the stability of system operation. Therefore, distribution network expansion planning with energy storage has become an important direction for the development of distribution network planning. [0003] The current research covers energy storage planning and configuration schemes on the power supply ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28H02J3/24H02J3/38
CPCH02J3/24H02J3/28H02J3/381
Inventor 郑伟民孙可张利军沈梁孙轶恺徐晨博邱迪刘东陈张宇谷纪亭袁翔
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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