摘要
目前风火打捆交直流混联外送系统作为一种新型输电方式,其稳定特性研究值得重视。文中基于扩展等面积准则(EEAC),研究了风电比例对风火打捆交直流混联外送系统的功角暂态稳定性的影响。将风电场机械功率和注入电网功率等值为临界群机械功率的增量,推导出系统功角加速度随风电比例变化时的函数,提出该函数为凸函数时应满足的条件。若余下群相对临界群等值惯量为无穷大时,两者相对功角首摆稳定性随风电比例增加而提高;反之,则随风电比例增加先提高后降低。仿真结果表明了文中分析的正确性。
At present the AC/DC transmission system with wind-thermal combined generation is a new way to transmit power, and its characteristics of stability should be paid attention to. Based on extend equal area criterion （EEAC） theory, the impact of the wind penetration on angle transient stability was studied. The function of angle acceleration changing with the wind penetration was deduced with the equivalence of wind farms＇ mechanical and electrical output power to the increment of critical group＇s mechanical power. And the conditions of satisfying the function to be a convex one were also proposed. If the equivalent inertia of the remaining group could be treated as infinite comparing with that of the critical group, the first swing stability of the relative angle of the two groups is improved as the wind power penetration increases. On the contrary, it would be improved firstly and then aggravated according to the wind power penetration＇s increment. The results of simulation show that the analysis of paper is correct.
出处
《电力系统自动化》
EI
CSCD
北大核心
2013年第20期34-40,共7页
Automation of Electric Power Systems
基金
国家科技支撑计划资助项目(2011BAA01B02)
国家电网公司科技项目(XT71-11-006)~~
关键词
扩展等面积准则
风火打捆
风电比例
功角暂态稳定性
extend equal area criterion （EEAC）
wind-thermal combined generation
wind power penetration
angle transient stability
