【摘要】 可靠、清洁的能源供应是现代社会发展与进步的保障,面对日益严重的能源危机,风能逐渐成为新的替代能源。风力发电与一般的能源发电有着很大的区别,其最大的一个特点是风速有很大的随机性,如果并网的风力发电机容量较大,则将对电网有较大影响。因而需要对包含有风电场的电力系统进行潮流计算,以分析风电场引起的电网电压和功率的变化。在此所研究的PQ模型是分析风电场的最基本也是最常用的模型。一般风力发电机的等值模型有三种:PQ模型、RX模型和简化RX模型。其中PQ模型又有不计及转差的PQ模型和计及转差的PQ模型这两种。在不要求较高精确度的情况下PQ模型实用性很强,因此研究风力发电机的PQ模型有很大意义。更多还原

【Abstract】 The energy source supply which is credible and clean is the guarantee of development and advancement of modern society.Because of energy sources crisis,wind energy is becoming a new replaceable energy.The most obvious characteristic of wind power is that wind speed has the randomicity.As a result,if the capacity of wind power is too large,it will have a great impact on the grid.So the power system flow should be calculated to analyze the change of voltage and power which is caused by the wind power.PQ model is the most used one to analyze wind power.Generally,wind power generators have three equivalence model:PQ model,RX model and simplified RX model.Among them,there are PQ model with slip and PQ model without slip.When the precision is not important,PQ model is very practical.So it has an important meaning to investigate PQ model.更多还原