A multi-mode combined cooling, heating and power micro-grid system considering ice storage air conditioning

Abstract

A multi-mode combined cooling, heating and power micro-grid system considering ice storage air conditioning is composed of a distributed power generation system composed of photovoltaic power generation, wind power generation, a fuel cell, a micro gas turbine and ice storage air conditioning, primary system composed of an energy storage system and other co-supply equipment, and a secondary dispatching control system. A CCHP-MG multi-time-scale optimal scheduling method is proposed, in a day-ahead plan, the uncertainty of renewable energy is described through multiple scenes, economic operationof CCHP-MG in a running optimization period is focused on; Intra-day scheduling is based on the scheme of the day-ahead plan, the difference and correlation of cooling, heating and power on scheduling time scale are considered, a two-layer rolling optimal scheduling scheme is proposed, the upper layer dispatches the combined cold and heat supply equipment, the lower layer adjusts power equipment,taking minimization of the adjustment cost as the goal, the smooth output of each co-supply equipment is obtained. The invention can remarkably improve the comprehensive utilization efficiency of energy and the local absorption capacity of the distributed renewable energy, and realize the economic and safe operation of the multi-energy micro-network.

Description

technical field [0001] The invention relates to the technical field of energy management of a combined cooling, heating and power microgrid, in particular to a combined cooling, heating and power microgrid system considering multiple modes of an ice storage air conditioner. Background technique [0002] With the depletion of traditional fossil energy, improving energy utilization efficiency, developing new energy, and strengthening the comprehensive utilization of renewable energy have become an inevitable choice to solve the contradiction between energy demand growth and energy shortage in the process of social and economic development. Due to the differences in the development of different energy systems, energy supply is often planned, designed, and operated independently, and there is a lack of coordination among them, which leads to problems such as low energy utilization rate, poor overall security and self-healing ability of the energy supply system. . The research a...

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Problems solved by technology

Dynamic optimal scheduling of combined cooling, heating and power microgrid based on model predictive control (Wu Ming, Luo Zhao, Ji Yu, Li Yang, Kou Lingfeng. Dynamic optimal scheduling of combined cooling, heating and power microgrid based on model predictive control[J]. Proceedings of the Chinese Society for Electrical Engineering, 2017 (24): 7174-7184+7431.) considers the charging and discharging life of electric energy storage in the current plan, and builds an accurate load forecasting model in the intraday model, and solves it based on multi-step rolling optimization The smooth output of each joint power supply equipment, but the intraday exchange power curve fluctuates too much compared with the previous day's curve, which may affect the stable operation of the external power grid

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