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毕业设计论文

姓 名： 冯琦 学 号： 1009310217 学 院： 电气工程学院 专 业： 电气工程及其自动化

题 目： 超级电容器储能平抑风电场功率波动的仿真研究

指导教师： 李卫国

2014 年 6 月

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东北电力大学本科毕业设计论文

摘 要

随着全球能源和环境问题的日益突出，风能作为一种清洁的可再生能源，其全球蕴藏量极为丰富，大力发展风力发电可以改善世界能源供给结构，缓解全球能源紧张和环境污染等问题，为人类社会的可持续发展做出重要贡献。然而，随着并网风电场规模的不断增大，风电功率的随机性和波动性对电力系统的影响越来越明显。大规模风电并网后对电网安全性、稳定性以及调度带来很大的影响，如果这些问题得不到有效的解决，不仅会危及到电网的安全稳定运行，而且会制约风力发电大规模的发展。

本文以平抑并网风电场输出功率波动，减小风电场并网对电力系统不利影响为目的，提出了一种以超级电容储能技术为基础，分布配置储能系统的新型风力发电系统方案，对风电场输出功率波动平抑策略，储能原理及储能元件参数进行研究。

首先，根据风电场输出功率特性和储能技术特点，选出采用超级电容器储能，继而提出一种以平均功率为参考的双向变流器控制策略。然后根据超级电容器的原理进行仿真，找出了电容器时间常数与平抑效果和储能容量之间的关系，结合文中的输出功率波形，确定了最优时间常数，并验证了超级电容器储能对于平抑功率波动具有显著的作用效果。

关键词 风力发电；功率波动；超级电容储能；控制策略

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东北电力大学本科毕业设计论文

Abstract

With the global energy and environment issues have become increasingly prominent,wind power as a clean&renewable energy, its global reserves is extremely rich, wind power can improve the structure of world's energy supply and ease the global energy shortage and environmental pollution problems, make an important contribution to the sustainable development of human society. However,with increasing scale of grid-connected wind farms, the effect of wind power randomness and volatility to power system become more and more obviously. Large-scale wind power bring a great impact on grid security, stability and dispatch , if these problems can not effectively addressed, it will not only endanger the safe and stable operation of the grid, but also limit large-scale wind power developments.

To stabilize the grid-connected wind farm output power fluctuations, reduce the adverse effects to power system. This paper purposes a new wind power generation system based on double-fed wind power generation and centralized configuration energy storage system. The strategy of stabilizing wind output power fluctuations, The energy storage principle and the energy storage component parameters were studied.

First of all, based on the characteristics of wind power output characteristics and energy storage technology, selected using the super capacitor energy storage, and then put forward a kind of average power as the reference of the bidirectional converter control strategy. Then according to the principle of the super capacitor are simulated, found that the capacitor time constant and smooth effect and the relationship between the energy storage capacity, Combined with the text of the output waveform, determine the optimal time constant, and verify the super capacitor energy storage has significant effect to restrain the power fluctuations.

Keywords: Wind power generation; Power fluctuations; Super capacitor energy

storage; The control strategy

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