| With the accessing of distributed power supply for example wind power generationconnected to the power grid The power stability problems become major problems,whichrestrict the further development of the power grid. While the power supply reliability andpower quality requirement enhances unceasingly, therefore the development of grid real-timeadjustment make the new regulation to be necessary. On the premise of ensuring to usedistributed power supply effectively. Ensuring the voltage stability of power grid ischallenging a control strategy.In order to ensure the voltage stability of power grid and reduce the active loss to theminimum at the same time.This paper analyzes the principle of voltage reactive control in thepower grid, and analyzes the advantages of automatic voltage control (AVC) systemtheoretically, this paper expounds the importance and difficult of wind power which havebeen connected to the electricity grid, such as the uncertainty of the uncertainty of wind speedand wind power output. Wind power connected to the electricity grid will be reliabilitystatistics, the output random model is established to obtain large amounts of wind motorsamples, through incremental parties in the application of power grid planning, finally, we usethe monte carlo simulation method to determine the probability distribution of operator, so asto find out voltage sensitive area and the more likely voltage line in the system.On the base of the above work,I takes reliability and economy of the power grid controlinto account, We put reactive power compensation device in the low voltage side oftransformer substation. In response to wind power access to power grid reactive powerconsumed. At the same time, considering the output of wind power, active deficiency must bechanged at a short time, which will also cause a voltage drop at the same time, the activereactive power balance of the whole system will be broken, system stability. But reactivepower compensation device can mitigate impact caused by wind farm.Finally I use BPA software to operate yunfu power grid data for the simulation calculation.The results of the strategies and recommendations on various operation modes power grid isreactive power compensation can work well Simulation results of yunfu power grid inresponse to wind power supply, which connected to the electricity grid, how to maintain thesystem voltage in a reasonable range has important practical significance. |
