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50MW风电场动态无功补偿方案设计 原创论文代写

摘  要

风力机是将风能转换机械功的一种动力机械。广义的说,风力机是以太阳为热源、以大气为工质的热能转换的叶片式发电机。目前的风力发电机大部分为异步发电机,必须与电网相连才能产生励磁进而发电。早期的风电场采用的是小型恒速风力发电机,它的并网研究相对简单,因为感应电机的自然滑动可以很容易获得比较大的阻尼,因此只需增加相对少一点的额定功率就能产生很好的效果。就因为这样,它必然受困于电抗储能与释放能量的延时性同并网的瞬时性之间的矛盾。但目前这个问题得到了解决,我们可以通过吸收电抗储能的方式来限制电路中电压的升高。风电场接入电网有两种方式,一是按照以前的方式并网,对于某一个风电场来说它的电能储量还是很小的,并把它的电源来广泛分布,扩大性的接入某一地区电网,在同时就能够消耗容纳;二是在风资源密度较高区域大力发展风电场,通过传输线路来对外输电。面对机组的单一电能储量和在并网时需要的机组数量越来越多,风电并网运行后对电网的影响愈加明显,研究其稳定性的影响已经成为人们备受关注的课题[1]。

ABSTRACT

Wind turbine is a wind energy conversion power machinery mechanical work. Broadly speaking, the wind turbine is based on the sun as a heat source to heat the atmosphere as the working fluid to convert vane generators. Most of the current induction generator wind turbine must be connected to the grid in order to produce excitation and thus generate electricity. Early wind farm is a small constant speed wind turbines, and the network of its relatively simple, because the induction motor can be easily obtained naturally slide relatively large damping, so that only a relatively small increase in the rated power can be generated good results. Because of this, it is bound to suffer from the reactance of energy storage and release latency and network with the contradiction between the instantaneous. But now this problem has been resolved, we can absorb the energy storage chokes way to limit the circuit voltage increases. Wind farms connected to the grid, there are two ways, one way and in accordance with the previous network, one wind farm for its energy reserves is still very small, and put its power to widely distributed, and expand access to certain sexual a regional power grid, at the same time will be able to accommodate consumption; Second, higher density in the wind resource area to develop wind farms, transmission through the transmission lines to be seen. The face of a single unit power grid reserves and in the number of units needed more and more wind power after running more obvious impact on the grid to study the stability has become a topic of concern [1] .