含高渗透率风电的电力系统频率控制

发布时间：2019-05-28 22:17

【摘要】：在含高渗透率风电的电力系统中,风电的功率波动性和有功-频率弱惯性将对系统的频率控制带来挑战。本文将针对这两个问题,从风机、风电场、储能以及电力系统等多个层面展开研究,寻求改善含高渗透率风电的电力系统频率控制的方法。在风电的功率波动性方面：首先,基于系统级的频率仿真以及运行充裕性分析,分别研究风电在分钟到数分钟级以及数分钟到30分钟级两个时间尺度上的功率波动对系统频率控制和运行充裕性的影响,并提出适用于不同系统的的风电场两个时间尺度的波动平抑指标的制定方法,为风电与储能示范工程的规划和运行提供支持；然后,依托国家863课题“多类型储能系统协调控制技术及示范”,提出了一种应用于平抑风电功率波动的储能系统协调控制方法,实现了示范工程项目提出的两个时间尺度的风电功率波动平抑指标,并减小了储能系统容量和功率的需求,波动平抑控制方法的效果在基于MATLAB\Simulink的时域仿真系统中进行了验证。在风电的有功-频率弱惯性方面：首先,提出了一种风速自适应的变速风力发电机短时支持系统频率的控制方法,使风机在不同的风速区间下以及变化的风速下能为系统提供短时且稳定的频率支持；然后通过对变速风力发电机的频率支持能力以及由频率支持产生的能量成本进行分析,提出了由变速风力发电机组成的风电场短时支持系统频率的优化控制方法,在风电场内对频率支持功率进行优化分配,降低整个风电场的频率支持能量成本并改善整个系统的频率控制效果,整个控制方法的控制效果在基于MATLAB\Simulink的IEEE Reliability Test System (IEEE RTS)仿真系统中进行了验证并与其他方法进行了对比。
[Abstract]:In the power system with high permeability wind power, the power fluctuation and active frequency weak inertia of wind power will challenge the frequency control of the system. In order to solve these two problems, this paper will study the wind turbine, wind farm, energy storage and power system from the aspects of fan, wind farm, energy storage and power system, and find out the methods to improve the frequency control of power system with high permeability wind power. In terms of power volatility of wind power: first of all, based on system-level frequency simulation and operation adequacy analysis, The effects of power fluctuations on frequency control and operation adequacy of wind power in minutes to minutes and minutes to 30 minutes are studied respectively. The formulation method of fluctuation suppression index of two time scales suitable for different systems is put forward, which provides support for the planning and operation of wind power and energy storage demonstration projects. Then, based on the national 863 project "coordinated Control Technology and demonstration of Multi-type Energy Storage system", a coordinated control method of energy storage system applied to calm wind power fluctuation is proposed. The wind power fluctuation suppression index of two time scales proposed by the demonstration project is realized, and the demand for capacity and power of the energy storage system is reduced. The effect of wave suppression control method is verified in the time domain simulation system based on MATLAB\ Simulink. In the aspect of active power-frequency weak inertia of wind power: firstly, a frequency control method of variable speed wind turbine short-time support system with adaptive wind speed is proposed. The fan can provide short-term and stable frequency support for the system under different wind speed ranges and changing wind speed. Then, through the analysis of the frequency support ability of the variable speed wind turbine and the energy cost generated by the frequency support, the optimal control method of the frequency of the short time support system of the wind farm composed of the variable speed wind turbine is put forward. The frequency support power is optimized in the wind farm, the frequency support energy cost of the whole wind farm is reduced, and the frequency control effect of the whole system is improved. The control effect of the whole control method is verified in the IEEE Reliability Test System (IEEE RTS) simulation system based on MATLAB\ Simulink and compared with other methods.
【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM614

【参考文献】