摘要
系统受到大扰动,发生严重有功缺额时,发电机调速控制和低频减载是维持系统频率稳定的主要手段。根据转子运动方程,发电机的转速变化反映了发电机输出功率的变化。利用发电机的频率特性可以用来跟踪紧急情况下发电机出力的改变,提出在多机系统中将多台发电机等值为一台发电机,利用等值发电机的频率变化特性相应调整切负荷各轮次切负荷量,实现了两者的协调配合;并在IEEE三机九节点系统中验证了其有效性,结果表明采用优化方案可以降低损失负荷量。
When the system suffers large active power voltage, generator speed control and under frequency load shedding are the primary means for maintaining system frequency stable. According to the rotor motion equation, the generator speed changing reflects changing in generator output power. The frequency characteristics of genera- tors can be used to track the generator output. Multiple generators can be equivalent to a generator is proposed in the multi-machine system. The frequency characteristics of the equivalent generator can be used to adjust the load shedding amount of each wheel to achieve the coordination between them. Its effectiveness is verified in IEEE 9- node system and the results show that the loss of load can be reduced under the optimization scheme.
出处
《科学技术与工程》
北大核心
2014年第4期222-224,235,共4页
Science Technology and Engineering
基金
国家863高技术基金项目(2011AA05A105)
中国石化总部2011年科技项目资助
关键词
低频减载
发电机
转速
频率
under frequency load shedding generator speed frequency
