Experimental Research On The Grid-connected Performance Of New Energy Power Generation Station

Ningxia in wind energy, solar energy resources, development potential, has good prospects for development. Due to random characteristics of renewable energy and electric energy real-time balance of natural hair, lose, with three features, including renewable energy power generation device connected to the power system, the random generation and electricity were not associated with two sets of random variables real-time balance scientific problems, causing the power system analysis, control and protection and a series of technical problems. In this paper, the main work is as follows:First of all, research new energy unit through low voltage control strategy in Ningxia grid, using theoretical analysis, simulation modeling and related network test technology, the combination of analysis of Ningxia operations overhand net control characteristic, the new energy research doubly-fed variable speed wind turbines (DFIG), the permanent magnet direct-drive type variable speed wind turbines (PMSG) and photovoltaic system fault voltage current characteristic; Operations equivalent analysis method for the research of new energy, new energy unit through low voltage control strategy and control mode of the converter, analysis contains kinds of new energy terminal clusters fault characteristics of the unit. Operations out of the research of new energy fault during single-phase reclosing constant speed fan, instantaneity of doubly-fed fan and fan electromechanical transient characteristics of the permanent magnet direct drive.Second, the mass grid, wind power, photovoltaic depot for Ningxia area of science that studies the disturbance test method, ensure the disturbance test in does not affect the power grid security and stability at the same time, reach the expected effect, inspection operations all types of fan in the Ningxia region wind power, photovoltaic and pv components of low voltage across a resistance and high voltage. Through the site investigation and preliminary simulation analysis, detailed design perfect disturbance test plan and organization, to ensure the feasibility and safety of disturbance test.Finally, through the Ningxia area operations disturbance test, the wind power, photovoltaic research Ningxia, wind power, photovoltaic space, and the parallel operation of all types of fan and short-circuit current characteristics of photovoltaic (pv), the analysis of characteristics of different types of blower and pv short-circuit current difference; Ningxia region operations disturbance test, the wind power, photovoltaic research operations in the Ningxia region wind power, photovoltaic net running reactive power compensation device features, including static reactive power compensator SVC and SVG static reactive power generator low voltage through the features.