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| VSC-HVDC Emergency Power Support and Dynamic Area Control Error Coordinated Control Strategy for Improving the Stability of Asynchronous Interconnected Power Grids |
| Chen Pengyuan1,2, Li Canbing1, Zhou Bin1, Fu Yiwei3, Yu Rui4 |
1. Hunan Key Laboratory of Intelligent Information Analysis and Integrated Optimization for Energy Internet Hunan University Changsha 410082 China;
2. Dongguan Power Supply Bureau Guangdong Power Grid CorporationDongguan 523000 China;
3. Department of Electrical Engineering Tsinghua University Beijing 100084 China;
4. Southwest Branch State Grid Corporation of China Chengdu 610041 China |
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Abstract In an asynchronous interconnected power grid with multiple VSC-HVDC lines, it may lead to significant power surplus or power shortage once a fault occurs in the VSC-HVDC system or in the AC power grid, which will cause power grid instability. In this paper, a coordinated control strategy of regional dynamic ACE and VSC-HVDC emergency power support is proposed. Firstly, the security and stability of the studied power system is analyzed to determine the power demand in the fault area as well as the supportable capacity of both dynamic ACE control module and VSC-HVDC emergency power support module. Then, the optimum emergency control strategy is selected to determine the amount of power support for each module according to the mathematical model and implementation principle of coordinated control strategy. Finally, the power instruction of coordinated control is modified and implemented based on the transfer capacity constraints of critical transmission lines. The proposed coordinated control strategy has been formulated and implemented using the actual data of power grids. The simulation results demonstrate the stability and feasibility of the proposed control strategy for asynchronous interconnected power grids.
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Received: 29 April 2018
Published: 29 July 2019
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2019, Vol. 34 
