Method for solving external characteristics of microgrid based on operating strategy under multi-microgrid grid-connected scenario

Abstract

The invention discloses a method for solving external characteristics of microgrid based on operating strategy under a multi-microgrid grid-connected scenario. Including: According to the different load characteristics, capacity scale and application situation of micro-grid, the load characteristics and power distribution model of typical micro-grid is established; Based on the constraint conditions of each power supply, the power output optimization model considering the operation strategy of micro-grid is established with the objective function of maximizing the daily operating income. A single-cross-section microgrid operation strategy model is proposed, and the external characteristics are solved based on the single-cross-section microgrid operation strategy. Based on the sequential Monte Carlo simulation method, the calculation method of micro-grid operational reliability is proposed under the micro-grid operation strategy. The method proposed by the invention can effectively improve the convergence speed of reliability calculation, and reduce the complexity of distribution network planning, reactive power optimization and other aspects in the scenario of multi-microgrid access to distribution network.

Description

technical field [0001] The invention belongs to the field of micro-grid operation simulation and control strategies, and in particular relates to the solution of micro-grid external load characteristics based on the grid-connected environment of multiple micro-grids. Background technique [0002] In recent years, extensive research has been carried out at home and abroad on microgrid modeling, operation, and distribution system planning under market conditions. Control scheme testing and operational characteristics research. Research on foreign microgrids mainly focuses on three aspects: reliability, accessibility, and flexibility, and discusses key technologies such as system intelligence, diversified energy utilization, and personalized power supply. Microgrids are also in the experimental and demonstration stage in my country. At present, more than ten microgrid pilot projects have been carried out in China, and rich research results and practical experience have been fo...

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Problems solved by technology

[0003] However, considering the characteristics of my country's power system, especially the specific problems faced by power comprehensive reform areas, there are still the following technical problems in the research of micro-grids: First, most of the current research on micro-grids focuses on the internal operation, control and optimization of micro-grids. There are few researches on the influence and mechanism of distribution network and technology interaction changes; secondly, in the analysis of distribution network including micro-grid, micro-grid is mostly regarded as a part of distribution network, and the operating characteristics of micro-grid itself are ignored. At the same time, it increases the complexity of distribution network analysis

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