A Day-Ahead Optimal Economic Dispatch Schedule for Building CCHP System Based on Centralized Energy Storage Infrastructure

Abstract

This paper proposes a day-ahead optimal economic dispatch model for building Combined Cooling, Heat and Power (CCHP) system based on centralized energy storage infrastructure. In the model, the loads are met by the centralized energy storage equipment directly, and the storage equipment are charged by varieties of energy supply devices in the energy station of the building CCHP system. The model is solved by the interior point method with Hessian matrix iteration. Simulation results show that by performing the schedule made by the dispatch model, the storage status of the centralized energy storage fluctuates in large dynamic range by flexible charging and discharging and the daily operation cost of the building CCHP system decreases remarkably compared with other traditional schedule strategies. Index Terms-Combined cooling, heat and power; CCHP; Centralized energy storage infrastructure; Interior point method; Optimal economic dispatch.

Multiobjective Optimized Dispatching for Integrated Energy System Based on Hierarchical Progressive Parallel NSGA-II Algorithm

“…e mathematical models of the energy supply equipment in the integrated energy system are established in [27].…”

Research on Real-Time Optimized Operation and Dispatching Strategy for Integrated Energy System Based on Error Correction

“…The household air conditioners in the systems can only supply space cooling and heating loads as the peak shaving equipment. The mathematical models and operating constraints of various energy supply equipment and energy storage equipment in the integrated energy system have been given in [34].…”

“…For example, in a simple integrated energy system containing only a micro gas turbine based CCHP unit and a set of cold and heat energy storage equipment, generally speaking, the unit power adjustment cost of energy storage is the lowest, while the unit power adjustment cost of the micro gas turbine based CCHP unit is higher, along with the fuel cost required to adjust the operating power. In the day-ahead economic dispatch, due to the characteristics of time-of-use electricity prices and load curves, energy storage equipment is generally arranged to charge at low electricity prices at night and to release energy when the electricity price is high during the daytime [34]. In other words, during the period of low electricity prices, various types of electric-heat (cold) conversion equipment should be used to supply multi-energy loads and the energy storage equipment should be in a charged state from the global perspective to improve system economy.…”