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Micro-grid energy configuration method combining energy storage capacity configuration and optimization operation

A technology for optimizing operation and capacity allocation, applied in circuit devices, AC network circuits, AC network load balancing, etc., can solve the problem of ignoring the coupling relationship between energy storage capacity and microgrid operation.

Active Publication Date: 2018-05-29
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

The above studies have improved the economy of microgrid operation to a certain extent, but have also ignored the coupling relationship between energy storage capacity and microgrid operation. Energy storage capacity directly affects the investment cost of microgrid, but the size of energy storage capacity Indirectly affects the operating cost of the microgrid, so it is necessary to propose a theoretical framework to jointly optimize the combination of energy storage operation and investment

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  • Micro-grid energy configuration method combining energy storage capacity configuration and optimization operation
  • Micro-grid energy configuration method combining energy storage capacity configuration and optimization operation
  • Micro-grid energy configuration method combining energy storage capacity configuration and optimization operation

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Embodiment Construction

[0100] Below in conjunction with accompanying drawing and by example the present invention is further described.

[0101] Such as figure 1 , figure 2 As shown, the microgrid system used in the present invention includes a photovoltaic power generation device, a wind power generation unit and an energy storage device. The investment decision-making period of energy storage is 8 years, the unit cost price of energy storage equipment is 1600￥ / kWh, and other technical parameters of energy storage are as follows: Charging efficiency η c =0.96, discharge efficiency η d = 1, the maximum state of charge and the minimum state of charge are soc min =0.1,soc max = 0.9. Grid generation cost coefficient β 1 =0.00245,β 2 = 0.05. In addition, the microgrid community includes 95 ordinary residential users and 95 commercial users, among which, it is assumed that 2 / 3 of the load is elastic load, and the rest is inelastic load. In order to simplify the optimization process, it is assum...

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Abstract

A micro-grid energy management strategy that combines energy storage investment and operation realizes reasonable investment and operation of energy storage devices in the construction of micro-grids.First, the fact that the energy storage capacity is a coupling variable in the investment and operation of the micro-grid is considered, the two time scales of energy storage year investment and micro-grid daily operation are used as two-stage optimization problems to be solved. Secondly, the information interactive relationship of electricity price and load consumption between the operator and the user is considered. A two-level distributed iterative algorithm is proposed to optimize the solution of the optimal real-time electricity price and optimal user consumption. Finally, the decoupledsolution of the optimal integer solution of the energy storage unit is performed according to the obtained micro-grid operating costs, so as to achieve the optimal investment of energy storage devicesand the economics of micro-grid operation. The method can also be applied to the optimization of investment and operation of other distributed units in the micro-grid.

Description

technical field [0001] The invention relates to a method for optimizing the operation and configuration of distributed units in the construction of micro-grid communities, especially for micro-grid systems containing random power generation units, improving the use efficiency and service life of energy storage devices in micro-grid operation, and reducing Unnecessary initial capacity investment for microgrid communities. Background technique [0002] The microgrid mainly provides the necessary electric energy for small local communities. It is a controllable power generation system composed of modular distributed power generation units (new energy power generation, fuel cells, etc.) and various user loads. The power generation characteristics of each distributed power generation unit in the microgrid system are different, coupled with the different power supply quality requirements of various power loads on the demand side, how to coordinate the power output of various distr...

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Application Information

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IPC IPC(8): H02J3/28H02J3/38G06Q10/06G06Q50/06
CPCG06Q10/06312G06Q10/06315G06Q50/06H02J3/28H02J3/381H02J2203/20Y02E40/70Y04S10/50
Inventor 祖其武牛玉刚王蓓
Owner EAST CHINA UNIV OF SCI & TECH
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