Research On Control Of Biomass Supported Solar Thermal Power Generation

With the increasing scarcity of fossil fuels and the environmental pollution of the worldwide, the development of new sources and the improving of energy efficiency has become the concern of the world. Solar energy because of its huge reserves,convenient and cleaning, are becoming more and more popular. However,solar thermal power generation system is not stable at all because of the impact from the weather.So,energy storage subsystem and auxiliary boiler subsystem are used to supply energy.The biomass boiler is used to support solar thermal power generation system for its widely spread and mature technology. Through the coordination between subsystems,not only can realize the continuity of power generation,but also greatly raised the environmental benefits of the system.On the basis of consulting a large number of domestic and foreign literature,the architecture of solar thermal system is designed.The energy flow and working modes are analyzed.All the working modes are divided into four groups.Least squares support vector machine(LS-SVM) is used to establish the mathematical model of solar collector,RBF is used to forecast DNI.It is verified by calculation that the model can be used to simulate the the working process of the solar collector well.The prediction result of DNI used by RBF is accurate.Accurately predicting of the DNI can effectively solve a series of problems brought by hysteresis of thermal power generation.Finally, the integrated and coordinated control strategy is established, based on the research of the systems from an overall standpoint. Designed the integrated and coordinated control strategy which is based on the energy balance theory aiming at the stable operation of the hybrid power system. Analyzed how to make the start-stop system working in a sequence as solar thermal system, energy storage system and biomass auxiliary boiler system and an inverse one to ensure the rational allocation of energy between the multi-energy source. This strategy can improve the stability,the economic and environmental benefits of the system.