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A two-layer hierarchical optimal configuration method for energy storage systems in active distribution networks

A technology for energy storage system and optimized configuration, which is applied in the direction of circuit devices, AC network circuits, AC network load balancing, etc., and can solve the problems of lack of interaction between the planning stage and the operation stage, and the lack of overall configuration.

Active Publication Date: 2018-12-07
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a two-layer hierarchical optimization configuration method for energy storage systems in active distribution networks. The lack of interaction in the operation phase did not lead to the optimal overall configuration, which improved the economy and voltage qualification rate of the distribution network

Method used

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  • A two-layer hierarchical optimal configuration method for energy storage systems in active distribution networks
  • A two-layer hierarchical optimal configuration method for energy storage systems in active distribution networks
  • A two-layer hierarchical optimal configuration method for energy storage systems in active distribution networks

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Embodiment

[0128] The verification system in this embodiment uses a 33-node test system, such as image 3 , Figure 4 and Figure 5 The three distribution network systems with distributed power sources are shown as the basic structure of the grid (PV in the figure is a photovoltaic power generation unit, and WT is a wind power unit) to verify the double-layer hierarchical optimal configuration model of the energy storage system proposed by the present invention. In the scenarios of different penetration rates, according to the different energy storage system investors, and the difference between energy storage centralized / decentralized configuration, the following calculation scenarios are formulated:

[0129] Table 1 Calculation example scene introduction

[0130]

[0131] After calculation, Table 3 and Table 4 respectively show the optimal configuration results of these three scenarios.

[0132] Table 3 Configuration results of energy storage system with enterprises as the main b...

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Abstract

The invention relates to a double-layer hierarchical optimization configuration method of an energy storage system in an active power distribution network. The double-layer hierarchical optimization configuration method comprises the steps of building an outer-layer planning model, wherein total investment cost is taken as a target, year is taken as minimum planning unit, and optimization objects are installation position and installation capacity of the energy storage system; and building an inner-layer running model, wherein optimal running economy is taken as a target, day / hour / minute is taken as minimum running unit, and an optimization object is a running control variable of storage energy. An optimal solution of the outer-layer planning model is figured out by mutual relation between the inner-layer running model and the outer-layer planning model, and optimization configuration of the energy storage system in the active power distribution network is further achieved. With regard to unfavorable influence of a distributed power supply on the power distribution network, two different time scale problems of running control and planning design are combined, so that the configuration of the energy storage system can be reasonably optimized, and the economy of the power distribution network is improved.

Description

technical field [0001] The invention relates to the field of optimization of an active distribution network, in particular to a two-layer hierarchical optimization configuration method for an energy storage system in an active distribution network. Background technique [0002] With the increasingly prominent energy crisis and environmental problems, the development and utilization of clean energy and the vigorous development of smart grid technology have become a common choice for countries all over the world. In the power system, the distribution network is closely connected with users, and its end often extends to remote areas far away from the power supply center, which is relatively fragile, but these areas often contain abundant renewable energy such as wind energy, solar energy, and tidal energy. A distribution network with distributed generation is also called an "active distribution network". Although the instability factors brought by distributed power to the dist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28
CPCH02J3/28H02J2203/20
Inventor 孙充勃宋毅原凯靳夏宁薛振宇吴在军袁简胡文强汲国强王逸超肖振锋宋卉窦晓波齐晓光张知刘博韩璟琳黄力淼
Owner STATE GRID CORP OF CHINA
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