Multi-microgrid random prediction control method

Abstract

The invention discloses a multi-microgrid random prediction control method, and the method comprises the steps: carrying out the modeling of the uncertainty of renewable energy power generation and anelectric heating load through the joint probability constraint of electricity selling and purchasing and gas purchasing in a system; adopting a decomposition method to decompose a joint probability constraint with coupling into M opportunity constraints, and adopting opportunity constraint prediction control to replace the opportunity constraints with deterministic constraints considering uncertain parameter statistical characteristics. In the energy management control strategy provided by the invention, the influence of uncertainty of renewable energy sources and uncertainty of loads in thesystem on the system is considered in the form of system electricity selling and purchasing and gas purchasing quantity joint probability constraints. Meanwhile, the permeability of renewable energy in the microgrid is higher and higher, so that the strategy can enable the behavior of the interconnected microgrid to be more predictable from the perspective of a main network, and the complexity ofan energy management system is reduced.

Description

technical field [0001] The invention relates to a multi-microgrid random predictive control method. Background technique [0002] Model Predictive Control (MPC) is one of the most successful control strategies currently concerned by the power system community. The ability of MPC to consider system characteristics and operating constraints, and to consider future predictions of system behavior and closed-loop control strategies makes it an attractive control strategy for power system applications. [0003] In the existing inventions about multi-microgrid energy management strategies, there are the following problems: (1) The existing inventions are mainly aimed at microgrids with electricity as the single energy source, and less consideration is given to microgrids containing multiple energy forms (2 ) did not analyze the renewable energy output and thermoelectric load uncertainty in the system and did not take them into account in the proposed algorithm. [0004] Wind powe...

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Problems solved by technology

[0003] In the existing inventions about multi-microgrid energy management strategies, there are the following problems: (1) The existing inventions are mainly aimed at microgrids with electricity as the single energy source, and less consideration is given to microgrids containing multiple energy forms (2 ) did not analyze the renewable energy output and thermoelectric load uncertainty in the system and did not take them into account in the proposed algorithm

[0004] Wind power and photovoltaic power generation have a high degree of uncertainty, which seriously affects the actual operation of the microgrid. At the same time, the electrical load and thermal load in the system are also subject to certain uncertainty due to the influence of weather and human factors.

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