Energy Management Of A Hybrid-Power Gas Engine-Driven Heat Pump

The experimental and theoretical research in this paper is based on Jiangsu Provincial Science and Technology Support Program "hybrid distributed energy system technology research and development" (Item number:BE2009151) and the Ministry of Jiangsu Provincial project "research on the foundations of hybrid-power gas engine-driven heat pump distributed energy supply system". The energy management of hybrid-power gas engine-driven heat pump system is researched.The energy management control strategy optimization of hybrid-power gas engine-driven heat pump system are divided into two parts, the drive train system and heat pump system. The optimization of energy management control strategy in this paper mainly focuses on the drive train system. The power system includes gas engine and batteries which are taken the main research object. And the simulation study is based on the software Matlab/Simulink. The main research contents are as follows:(1) The basic principles of parallel hybrid-power gas engine-driven heat pump system is described briefly. The operating modes of the HPGHP system and energy flow are analyzed. The operating modes of the HPGHP system are divided into five forms:in mode S, the engine drives the motor to charge the battery packs. In mode D, the engine runs in the economical zone that can meet the full load demands of the HPGHP systems and the motor stops running. In mode C, the engine drives the compressor and the generator to generate electricity at the same time. In mode M, the motor drives alone. In mode L, the engine and motor drive together and the engine is running in the economical zone.(2) The establishment of HPGHP simulation platform are divided into three forms:the drive train system, heat pump system and heat recovery system. Mathematical models of each member are established by combining theoretical modeling and experimental modeling method, the drive train system includes gas engine, electric motor, battery pack; the heat pump system includes a compressor, an evaporator, a condenser, an expansion valve; the heat recovery system includes a jacket water heat exchanger, flue gas heat exchanger, a dynamic model of the whole system is obtained through the mutual coupling components parameters.(3) the comprehensive efficiency of the HPGHP system is put forward under discharging\ charging condition. On this basis, the maximization of the comprehensive efficiency is considered to be the optimization objective function, which combined with battery control energy management strategy, and the proposed control strategy of the HPGH system is analyzed in detail, which including logic threshold control strategy based on engine thermal efficiency optimization curve and instantaneous optimal control strategy based on the comprehensive efficiency of the HPGHP system which combined with the SOC of battery in real time.