The Control Strategy On CCHP System Based On Micro Turbine For Island Use

China have vast marine territory, numerous islands, the ocean has a land area ofabout2,997,000square kilometers. But only a few of the islands are close to theinland, its power can be transmitted through submarine cables. most of the island areaway from the interior. there is a a larger energy gap in the water and electricity. it isalso increasingly important for the development of a reliable supply of energy to runthe island. Combine cooling heat and power system(CCHP) is one of the mostpromising technology, which enables to supply heat, cold and electricity efficiently.The CCHP control for inland use is still in its infancy. The work about the CCHPsystem use in island is still not be seen, so it’s important to start research about thistechnology. This paper is as follows:In this paper, a new CCHP system structure is proposed, a micro-turbine provideelectricity, air chillers to provide cooling air, this structure reflecting better emissionscharacteristics. The first step for the system is to establish a mathematical model formicroturbines, high-speed permanent magnet generator, air expansion chiller systems.The result shows that the model is accuracy and availability for the following works.Then the Subsequent steady-state and variable conditions of the CCHP systemperformance is analyzed. Then run its rated operating conditions characteristic of thisarticle and comprehensive energy efficiency of the simulation study, the two greatestimpact for system operation: environmental changes and load changes, the size andimpact of the coupling characteristics of each load were analyzed. We obtain thesteady-state operating conditions map, and can easily find the system efficiency andenergy efficiency under different loads.For this special island, different control strategy is studied, and the system worksin different conditions (winter conditions, working conditions and excessive summerseason conditions) loads based on the climate changes, then carried out the basissimulation for different system operation strategies, and system energy utilization onthe island were analyzed.Finally, the simulation result were analyzed, and the original system has beenimproved in different structure. On the improved system capacity for lithiumabsorption chillers, heat storage tank capacity and expansion chiller cooling powerratio, the three parameters is optimized, improved particle swarm optimizationalgorithm in this paper showed good convergence and accuracy. After optimization,the system were analyzed and found equipment capacity and operating parameters inthe original design load conditions running well throughout the whole year, it have amore comprehensive energy efficiency significantly improved. And the result demonstrate the effectiveness of this method.A control system for CCHP system is bulit and the software is under testing, theexperiment already did shows that it works well. and further study and research canbe developed on this system.