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| Voltage Stability Critical Injection Area Determination via Cross-Relative Gain |
| Li Xue1, Jiang Tao1, Li Guoqing1, Jia Hongjie2, Hou Kai2 |
1. Department of Electrical Engineering Northeast Electric Power University Jilin 132012 China;
2. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China; |
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Abstract This paper proposes a novel method for identifying the voltage stability critical injection areas (VSCIA) that impact the voltage stability of critical nodes in power systems. The voltage stability critical nodes are identified through the voltage stability index (VSI). Considering the voltage critical nodes as the pilot buses of VSCIAs, the load and generator nodes that have strong voltage coupling with the pilot buses are identified according to the cross-relative gain (CRG) and then the VSCIAs containing the voltage stability pilot buses are constructed. Moreover, based on the practical VSCIAs, a voltage control strategy under steady state and emergency conditions is proposed to improve the voltage stability of the system. Finally, the effectiveness of the proposed method is demonstrated in the New England 39-bus system. Besides, the method is further applied in the Polish power grid to verify its feasibility and practicality in bulk power systems.
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Received: 30 October 2016
Published: 05 March 2018
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2018, Vol. 33 
