An economical optimization scheduling method for multi-microgrid active power distribution system with cogeneration of cooling, heating and power

Abstract

The invention discloses an economic optimization scheduling method for multi-micro-grid active power distribution system with combined cooling, heating and power supply. The regional dispatching layer composed of the combined cooling, heating and power microgrid and the active distribution network; then, analyze the equipment in the multi-microgrid of the combined cooling, heating and power generation and establish an economic optimization dispatching model; establish the active distribution network Economic optimal scheduling model; finally, using the interaction value of the tie-line electric power of the combined cooling, heating and power supply type multi-microgrid and the active distribution network as the coupling variable, set up the convergence conditions for the parallel solution of the optimal scheduling of two stakeholders; call it in MATLAB Cplex solves the problem and obtains the scheduling plan. The invention provides an effective, practical and scientific energy optimization scheduling method, which is beneficial to popularization and application of energy saving.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to an economically optimized dispatching method for a multi-microgrid active power distribution system of combined cooling, heating and power generation. Background technique [0002] Under the new form of vigorously promoting energy conservation and emission reduction, increasing the proportion of renewable energy power generation and accelerating the energy revolution, it has become the consensus of the government, enterprises and the public to actively develop distributed power and improve energy utilization efficiency; Cooling heating and power (CCHP) combined power generation system, as a typical representative of micro-energy grid, utilizes primary energy utilization rate as high as 90% through energy cascade, and becomes an important development trend of future energy technology. The management mode and control method of the traditional distribution network are...

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Problems solved by technology

[0004] According to the current research, the following outstanding deficiencies are found: 1) A single cogeneration microgrid is taken as the research subject, and the actual situation of simultaneous access to multiple microgrids in the active distribution network is not considered; 2 ) model the multi-microgrid and the active distribution network as independent stakeholders, but when solving the problem, the active distribution network is economically optimal first, and then the "secondary coordination" of the multi-microgrid system is optimal, and the multi-microgrid and active distribution network cannot be realized. Parallel solution of the power grid; 3) In the multi-microgrid active power distribution system, there are only simple electrical load requirements in the multi-microgrid, and the demand for cooling and heating loads is not considered

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