An Economic Dispatch Method of Microgrid Based on Distributed Network Control

Abstract

The invention discloses a micro-grid economic scheduling method based on distributed network control, which includes S1: according to the economic scheduling model, deduce the theoretical optimal output formula of the controllable distributed generation DG under constraint conditions; S2: according to the micro-grid The two-layer control model of the power grid constructs the communication network; the two-layer control model of the microgrid includes: the lower microgrid and the upper communication network; S3: Design the weight matrix according to the upper communication network, and obtain the distributed control law according to the weight matrix; S4: According to The distributed control law calculates the set value, and adjusts the output of the controllable distributed generation DG according to the calculated set value, so as to realize the economical optimal dispatch of the microgrid. The beneficial effects obtained by the present invention are: by realizing that the micro-increasing rates of all controllable DGs are equal, the total power generation cost of the microgrid can be minimized; the weight matrix is ​​designed to facilitate the algorithm design; in the iterative process, it can be guaranteed System power balance.

Description

technical field [0001] The invention relates to the technical field of micro-grid distributed control, in particular to a micro-grid economic scheduling method based on distributed network control. Background technique [0002] In recent years, distributed generation (Distributed Generation, DG) relying on renewable energy has developed rapidly, and microgrid, as an effective management form of distributed Power supply reliability and stability are of great significance. However, renewable energy power generation depends on the external environment, its output has obvious randomness, and the load demand has fluctuations. At the same time, the inertia of the microgrid itself is small, and the two-way flow of the power flow. Economic dispatch of microgrids becomes very difficult. [0003] At present, the average consensus algorithm has been widely used in the economic dispatch of microgrids, but there are two problems: 1) In the iterative process, the average consensus algor...

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Problems solved by technology

However, renewable energy power generation depends on the external environment, its output has obvious randomness, and the load demand has fluctuations. At the same time, the inertia of the microgrid itself is small, and the two-way flow of the power flow. Economic dispatch of microgrids becomes very difficult

[0003] At present, the average consensus algorithm has been widely used in the economic dispatch of microgrids, but there are two problems: 1) In the iterative process, the average consensus algorithm will destroy the system balance; Nodes with centralized functions cannot achieve complete distribution

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