A Study Of Low Voltage Ride Through Requirement In Power Grid Of Different Area

Due to energy demand Increased rapidly, meanwhile the increasingly serious environmental pollution, wind power has Obtained greatly development worldwide as one of the most important alternative energy. With China's energy industrialization structure changes, the proportion of wind power increasingly heavy, the influence of wind generator performance to grid has not to be ignored, therefore according to actual situation of the grid, wind generator must have strict requirements. By adopting different Low Voltage Ride Through Requirement in Power Grid of Different Area, it is beneficial to investment saving, power system stability, wind power equipment manufacturer and national wind power development. This paper analyzes two kinds of wind generator that large interconnect to power grid at present, namely asynchronous wind-driven generator and doubly-fed induction generator. This study research the structure,principle of two kinds of wind generator. Elaborated on doubly-fed wind-driven generator mathematical model And add doubly-fed induction generator model and wind power model into the database of Power System Analysis Software Package. Formed computational analysis system containing the wind power system contains wind power, executed transient stability calculation based on powe system contains wind power. Researched voltage fluctuations in wind power.at access points of WEPRI-36 system under big disturbance. This research mainly concerns the wind generator large output capacity. A series of voltage fluctuations curves have been simulated according to different types of wind turbine and fault capacity, then through the fitted curve and got the system the basic low voltage ride through requirement curve. Meanwhile selection and studied some practical grid under big disturbance. Comparing the previous one, this research mainly concerns the wind generator smaller output capacity.then through the fitted curve and got the system the basic low voltage ride through requirement curve. Meanwhile selection and studied some practical grid under big disturbance, thereby get wind of different regions of low voltage across the basic standard curve.