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Layered and distributed optimal scheduling method for interconnected microgrid

A technology for interconnecting microgrids and optimizing dispatching. It is applied in instruments, data processing applications, forecasting, etc. It can solve the problems of renewable energy and load uncertainty transaction electricity price formulation system operation and energy transaction problems.

Pending Publication Date: 2021-03-19
STATE GRID HUBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the energy distributed dispatching process of the interconnected microgrid system, the uncertainty of renewable energy sources and loads, as well as the formulation of transaction electricity prices also bring difficulties to system operation and energy transactions.

Method used

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  • Layered and distributed optimal scheduling method for interconnected microgrid
  • Layered and distributed optimal scheduling method for interconnected microgrid
  • Layered and distributed optimal scheduling method for interconnected microgrid

Examples

Experimental program
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Embodiment 1

[0079] In order to realize the optimized dispatching operation of the interconnected microgrid, an embodiment of the present invention provides a hierarchical distributed optimal dispatching method for the interconnected microgrid, the method includes the following steps: S1. Establishing a cloud-edge coordinated interconnected microgrid operation communication architecture; S2 .Construct the optimal dispatching model of the interconnected micro-grid system in which the upper layer and the large power grid cooperate and interact; S3. Construct the economic dispatching model of the micro-grid operator in the lower layer to deal with source-load uncertainty; S4. Based on the target cascading method, optimize the dispatching of the interconnected micro-grid system The model is decoupled from the economic scheduling model of the microgrid operator, and a decoupled distributed optimal scheduling model of the interconnected microgrid system is established, so that the system can be ca...

Embodiment 2

[0144] Below in conjunction with specific examples, the technical method and system of embodiment 1 are verified for feasibility, see the following description for details:

[0145] In the embodiment of the present invention, a distribution network area includes three microgrids and an interconnected microgrid operator. All microgrids are equipped with photovoltaics, wind turbines, micro gas turbines, energy storage, and computing units for decision-making, and ignore energy transmission losses in interconnected microgrids. The analysis parameters of the example are set as follows: and 1500kW and 1000kW respectively. The large power grid uses the time-of-use electricity price shown in Table 1. The charging and discharging costs of energy storage are 0.4CNY / kWh and 0.6CNY / kWh respectively, and the charging and discharging efficiencies are 0.95 and 0.97. The detailed parameters of each microgrid are shown in Table 2. Load and renewable energy forecast information such as ...

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Abstract

The invention provides a layered and distributed optimal scheduling method for an interconnected microgrid. The method comprises the following steps: S1, establishing a cloud-side coordinated interconnected microgrid operation communication architecture; s2, constructing an interconnection microgrid system optimization scheduling model with cooperative interaction between an upper layer and a large power grid; s3, constructing a microgrid operator economic dispatch model of lower-layer processing source load uncertainty; s4, decoupling the interconnected microgrid system optimization scheduling model and the microgrid operator economic scheduling model based on a target cascade method, and establishing a decoupled interconnected microgrid system distributed optimization scheduling model toenable the system to perform calculation and operation in a distributed mode; s5, performing parallel solving on the distributed optimization scheduling model of the interconnected microgrid system;and S6, carrying out distributed optimization scheduling control on the interconnected microgrid system based on a result obtained by solving in the step S5. According to the invention, the cooperative interaction between the interconnected microgrid system and the large power grid can be realized, the influence of renewable energy and load fluctuation on the scheduling operation of the system isreduced, the local privacy protection of microgrid operators is supported, and the operation calculation efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of power system micro-grid optimization, in particular to a hierarchical distributed optimization scheduling method for an interconnected micro-grid. Background technique [0002] Microgrid can flexibly and efficiently integrate and utilize local distributed energy, improve the reliability of local power supply and the efficiency of energy utilization, and reduce the impact of renewable energy fluctuations on public power grids. In recent years, with the maturity of distributed renewable energy technology and the advancement of a new round of power system reform, a large number of microgrids and independent energy service providers have sprung up. As the penetration rate of these distributed devices increases, the control and operation of large-scale microgrid systems becomes extremely challenging. On the one hand, peak-valley unbalanced power and source-load uncertainty have greatly affected the safe and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/067G06Q50/06Y04S10/50Y02E40/70
Inventor 胡伟孔祥玉沈煜孙方圆杨帆卢文祺雷杨赵栩
Owner STATE GRID HUBEI ELECTRIC POWER RES INST