摘要
风力发电系统输出功率的随机性对大规模风电并网会产生诸多不利影响,近年来采用储能装置平抑风电输出功率的研究取得了一定进展。文中分析了单独采用蓄电池组或超级电容器对风力发电输出功率进行补偿时的不足之处,在此基础上构架了采用蓄电池组和超级电容器的混合储能系统,并进一步提出了利用其平抑风力发电输出功率的控制方法。所提出的控制方法将补偿功率分为高频和低频2个部分进行补偿,一定程度上克服了储能设备单独使用时的不足,并且在补偿过程中考虑了电网调度的需求。经仿真验证该方法能够较好地平抑风力发电系统输出功率。
A large scale of wind power integration can have negative impacts on the power grid due to randomness of wind power.How to smooth out the fluctuation of wind power using energy storage device has made improvements recently.The deficiencies in smoothing wind power fluctuation with single type of energy storage device are analyzed.A hybrid energy storage system consisting of supercapacitor and storage battery group is designed accordingly,and the control scheme for this hybrid system is also proposed to realize power smoothing.The proposed control scheme divides compensation power signal into a high-frequency signal and a low-frequency signal.In this way,the deficiencies in smoothing wind power fluctuation with single type of energy storage device can be made up to a certain extent.Besides,the dispatching expectation is taken into account in the smoothing process.Simulation results show that the designed hybrid energy storage system and proposed control scheme can smooth out the wind power fluctuation properly.
出处
《电力系统自动化》
EI
CSCD
北大核心
2013年第1期122-127,共6页
Automation of Electric Power Systems
基金
国家高技术研究发展计划(863计划)资助项目(2011AA05A105)~~
关键词
风力发电
储能装置
输出功率平抑
混合储能系统
蓄电池
超级电容器
wind power
energy storage device
output power smoothing
hybrid energy storage system
storage battery
supercapacitor
