抑制风电对电网影响的储能系统调控策略研究

发布时间：2018-03-05 10:30

本文选题：风力发电　切入点：储能电池　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：风力发电是解决能源短缺和环境污染问题的有效途径,在保证能源、电力和经济可持续发展方面具有重要战略地位。随着风电并网规模的扩大,风能所固有的随机性强、波动性大和间歇性特点对电力系统频率、电压及稳定性带来的负面影响已经变得不容忽视。利用储能系统的有功及无功吞吐能力,实时调控风电入网功率,从而在实现风能最大化利用的同时最小化其对电网的不利影响,成为一项重要的研究课题。本文基于电池储能系统,以平抑风电输出功率波动主,电压支撑为辅,对储能系统的有功及无功调控策略进行了详细研究,主要在以下几方面开展了工作:1.为确定波动平抑目标,本文研究了风电机组的有功功率波动特性以及电力系统的频率响应特性。基于风电场输出功率波动频谱分析,研究风电场储能配置结构,为风电场确定储能安装位置提供依据。2.基于定时间常数滤波的常规波动平抑策略,在有限储能容量情况下难以同时兼顾长期平抑效果及储能寿命,针对此问题,本文计及储能充放电能力,提出了一种改进的储能系统有功控制策略。本策略基于可变时间常数滤波和荷电状态(state of charge,SOC)直接反馈控制,根据储能剩余电量实时调节储能系统输出功率,改善平抑效果并优化储能寿命。3.分析了无功功率对电压的支撑作用,研究了利用储能系统调节风电入网点电压的无功补偿控制策略。为不影响有功波动平抑,进而分析了储能系统最大无功能力,对电压环输出动态限幅,以保证系统的正常运行。4.利用MATLAB/Simulink仿真软件仿真验证了本文策略在平抑风电场有功功率波动、延长储能寿命、维持风电场入网节点电压上的有效性,降低了风电并网对电网的冲击。
[Abstract]:Wind power generation is an effective way to solve the problem of energy shortage and environmental pollution, and has an important strategic position in ensuring the sustainable development of energy, electricity and economy. The negative effects of large volatility and intermittent characteristics on the frequency, voltage and stability of power system have become more and more important. By using the active and reactive power capacity of the energy storage system, the power of wind power entering the network can be adjusted in real time. Therefore, it has become an important research topic to maximize the utilization of wind energy and minimize its adverse impact on the power grid. Based on the battery energy storage system, the main task of this paper is to stabilize the output power fluctuation of wind power, while the voltage support is secondary. The active and reactive power control strategies of energy storage system are studied in detail. In this paper, the active power fluctuation characteristics of wind turbine and the frequency response characteristics of power system are studied. Based on the spectrum analysis of wind farm output power fluctuation, the configuration of wind farm energy storage is studied. This paper provides a basis for determining the location of energy storage installation in wind farms. The conventional wave stabilization strategy based on constant time constant filtering is difficult to take into account the long-term calming effect and energy storage life simultaneously in the case of limited energy storage capacity. In this paper, an improved active power control strategy for energy storage system is proposed, which is based on variable time constant filtering and state of charge SOC-based direct feedback control. The output power of the energy storage system is adjusted in real time according to the residual energy quantity of energy storage, which improves the stabilization effect and optimizes the energy storage life. 3. The supporting effect of reactive power on the voltage is analyzed. In this paper, the reactive power compensation control strategy for regulating wind power entry network voltage by energy storage system is studied. In order not to affect the active power fluctuation, the maximum reactive power capacity of the energy storage system is analyzed, and the output dynamic amplitude of the voltage loop is also analyzed. In order to ensure the normal operation of the system .4.Using MATLAB/Simulink simulation software to verify the effectiveness of this strategy in stabilizing the active power fluctuation of wind farm, prolonging the life of energy storage and maintaining the voltage of the node in the wind farm. Reduce the impact of wind power grid connection.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614;TM727

【参考文献】