关于高校对农村群体工作实践指导的研究

农村群体工作的发展具有重要意义,促进农村群体工作的发展需要组织和动员全社会的力量。高校在农村群体工作发展中具有独特作用,促进高校与农村体育事业的结合必要可行。促进高校与农村群体工作的结合需要相应的政策扶持。     

关于高校对农村群体工作实践指导的研究

农村群体工作的发展具有重要意义,促进农村群体工作的发展需要组织和动员全社会的力量.高校在农村群体工作发展中具有独特作用,促进高校与农村体育事业的结合必要可行.促进高校与农村群体工作的结合需要相应的政策扶持.     

基于模糊去约束法的V2M系统运行优化

选取一个含有EV(电动汽车)、光伏发电、风力发电、燃气轮机、蓄电池储能单元所组成的微电网运行优化问题作为研究对象,提出一种模糊去约束的求解方法.在系统对负载、光伏和风力发电出力有效监测和预测条件满足时使用这种方法,将EV与微网储能单元电池约束去除,将微电网带非线性约束的优化问题转变为线性优化问题.对比传统优化方法和模糊去约束法,系统的优化效率有显著提高.     

A composite controller for grid connected photovoltaic systems

This paper addresses a new composite controller for a boost-buck inverter to interface the photovoltaic array with the power grid. Based on dynamically tracking the maximum power point, two novel control methodologies are proposed to control the DC-bus and the output current for the inverter. First, a new linear cycle discrete control algorithm is introduced to realize linear control of the DC-bus voltage and synchronously get the reference current for the inner current loop with a little calculation. Then, to assure a good adaptability to noise and model uncertainty, an auto-disturbance rejection controller is chosen as the output current controller, which does not depend on precise mathematics model. Thus, output current of PV system to the grid is with low harmonic distortion and unity power factor. Simulations and experiments are performed, and the results show that the system is of excellent robustness and effective.