Coordinated Active Power And Reactive Power Dispatching In Microgrid Based On Demand Side Response

With the depletion of fossil energy and the deterioration of the environment,low carbon economy,clean energy and electricity generation price bidding have gradually become the theme in the current electricity market.The formation of electricity marketization has prompted diversity electricity consumption manners and characteristics of power users,at the same time,they have also brought problems such as power supply and load boundary ambiguity.Due to the excessive consumption of reactive power by grid users,the problem of low grid voltage and unstable operation may be caused.Therefore,the unified scheduling concept of active reactive power and demand side response of the power side unit has worth paying attention to in the current research.In this paper,the microgrid economic dispatch based on flexible load demand side response and reactive power reward and punishment fees is studied.The specific contents as follows:First,this paper analyzes the mathematical model of power supply and load,which is common in micro grid,such as photovoltaic generation and wind power generation,micro gas turbine and fuel cell,energy storage technology and electric vehicle.The distributed generation technology,such as photovoltaic power generation and wind power generation,can not only produce active power,but also generate reactive power.Secondly,the demand side response model of flexible load is established,the translation load model,the transferable load model and the interruptible load model are introduced,and it is introduced into the active dispatch of the micro grid.The simulation results show that the demand side response of the flexible load is effective in regulating the load curve and eliminating the new energy generation.Finally,aiming at the restriction of the interaction power factor of the microgrid and the large power grid,three kinds of reactive power reward and punishment methods are put forward.They are introduced into the microgrid active dispatch and the active reactive power coordination scheduling model of microgrid based on demand side response is established.The non linear algorithm in matlab isused to solve the target function.Through five examples,the effects of flexible demand side response and different rewards and punishment charging methods on the operation cost of microgrid,power output and reactive power distribution of photovoltaic power generation,and the power factor of interaction power of microgrid and large power grid are analyzed.It verifies the rationality and feasibility of the reactive power charging method.