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| Emergency DC Power Support Control Based on Time-Optimal Control and Auto-Disturbance Rejection Control |
| Xie Huifan1, 2, Zhang Yao1, Lin Lingxue1, Zhong Qing1, Deng Quanshuai1 |
| 1. South China University of Technology Guanzhou 510640 China; 2. Maintenance & Test Center, EHV, China Southern Power Grid Guangzhou 510663 China |
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Abstract 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.
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Received: 14 November 2008
Published: 04 March 2014
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2010, Vol. 25 
