Distributed optimal operation method considering uncertainty for active distribution network

Abstract

The invention discloses a distributed optimal operation method considering the uncertainty for an active distribution network, which comprises the steps of firstly, building an uncertainty model of photovoltaic output by using a robust optimization method in consideration of the uncertainty of the photovoltaic output; secondly, building an optimal scheduling model of the active distribution network, wherein the model takes the minimum operation cost as an objective function and comprehensively considers power flow constraints, safe operation constraints and output constraints of adjustable andcontrollable resources; then building an optimal scheduling model of multiple microgrids connected to the distribution network, wherein the model takes the minimum operation cost of the microgrids asan objective function and adds the problem of renewable energy consumption serving as a penalty function to the objective function; and modifying the distribution network model and the microgrid model based on a Lagrange function in consideration of a coupling relationship between the distribution network and the microgrids in tie-line power so as to build a distributed optimal scheduling model of the active distribution network.

Description

[0001] Field [0002] The invention belongs to the technical field of distribution network operation optimization, and in particular relates to a distributed optimization operation method of an active distribution network considering uncertainty. Background technique [0003] With the deepening of the reform of the power system, the call for the development of distributed power is getting higher and higher. As an effective management form of distributed power, micro-grid has developed rapidly in recent years. Micro-grid plays an important role in promoting the environmental protection and economy of power system has great significance. However, with the increasing penetration rate of distributed power generation, the access of distributed power generation to distribution network in the form of micro-grid brings great challenges to the optimal dispatching of distribution network. [0004] The traditional centralized scheduling needs to collect the information of each distribut...

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Problems solved by technology

[0005] At present, the research on centralized optimal dispatching of active distribution network has become mature, but the distributed optimal dispatching of active distribution network considering uncertainty is still in the exploratory stage

Some scholars only use methods such as differential evolution algorithm, Maldives decision-making, and random probability. Although they can refine the interests of microgrids and distribution networks as different stakeholders to a certain extent, they weaken the advantages of decentralized autonomy of microgrids. At the same time, they do not consider Uncertainty of Distributed Power Output

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