1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China
The influence of operating conditions and fault scenarios on DC commutation security and synchronism stability is analyzed quantitatively. The idea of coordination and optimization between the equipment protection and the system protection is put forward. The quantitative index reflects the commutation security of DC systems, and the extended equal-area criterion (EEAC) margin index reflects synchronism stability of power systems. Based on these two quantitative indices, the complex correlation between the two stability is revealed. According to the performance cost ratios of the control measures for improving commutation security and synchronism stability, the control strategy is coordinated and optimized to ensure the DC commutation security and system synchronism stability with the minimum control cost. Based on the simulations of the AC/DC interconnected synchronous system and DC interconnected asynchronous system, the rationality of the commutation security margin index and the effectiveness of the coordinated optimization strategy are verified.
This work is supported by State Grid Corporation of China (No. 5100-201940398A-0-0-00).
|||XUE Yusheng, TAO Qi. Quantitative Analysis and Coordination Control for DC Commutation Security and Synchronism Stability of AC/DC Hybrid Power System[J]. Automation of Electric Power Systems,2020,44(23):11-19. DOI:10.7500/AEPS20200707002|