摘要
基于广域测量全局信号、根据时间最优控制理论和自抗扰跟踪控制理论设计了交直流互联电网紧急直流功率支援控制策略,利用时间最优控制驱赶系统状态迅速趋近故障后OMIB新平衡点并对其进行镇定控制。自抗扰控制器通过控制直流功率来实现对虚拟控制量的跟踪;新平衡点基于IEEAC思想通过利用最优布点的PMU实时信号在线不断预测逼近得到。通过6机3区域2直流系统验证表明:该控制策略能最大限度地发挥HVDC联络线的快速调制和短时过载能力,在联络线发生大扰动时,实现紧急控制和对功率缺额网区进行功率支援,其综合控制效果优于传统的线性DCM调制;自抗扰跟踪控制对扰动和模型的不确定性具有强适应性和强鲁棒性;以新平衡点为控制目标的直流调制效果明显优于以初始平衡点为控制目标的调制效果。
Based on time-optimal control （TOC） theory and auto-disturbance rejection control （ADRC） theory,emergency DC power support （EDCPS） control strategy is proposed with wide area signal measurement system （WAMS） signals. TOC theory is introduced to drive and fix system state to a post-fault new equilibrium point which based on integrated extended equal area criterion （IEEAC） can be approached on-line with WAMS signals,and finally auto-disturbance rejection control （ADRC） theory is introduced to trace the virtual control input. Simulation results of 6-machine-dual-infeed three-area system show that the proposed EDCPSCS can take advantage of quick DC power modulation and short-time overload capability to provide emergency control and power support and has a better control effect than that of traditional linear DC power modulation. ADRC owns characteristics of high adaptability and robustness in disturbance and model uncertainty,moreover,control effect aimed at the new equilibrium point is better than that aimed at the original one.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第8期145-153,173,共10页
Transactions of China Electrotechnical Society
关键词
时间最优控制
自抗扰控制
广域测量系统
紧急直流功率支援
Time optimal control
auto-disturbance rejection control
wide area measurement system
emergency DC power support
