An optimal location of static VAr compensator based on Gramian critical energy for damping oscillations in power systems

作者：Le Van Dai; Li, Xinran; Li, Peiqiang; Le Cao Quyen^*

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2016, 11(5): 577-585.

DOI：10.1002/tee.22275

• controllability Gramian
• power system oscillations
• SVC
• optimal placement
• IEEE 39-bus England power system

The increase in the scale and complexity of interconnected power systems leads to multiple electromechanical oscillations. Therefore, the electric network needs to be made more stable. One type of Flexible alternating current transmission systems (FACTS) devices, namely the static VAr compensator (SVC), can be installed at buses to increase the stability margins and dampen the power system oscillations by exchanging capacitive and/or inductive load to maintain and/or control specific parameters of electrical power systems. The efficiency and performance of the SVC depend on its optimal location. Consequently, seeking the optimal placement for SVC has become a key issue. In this paper, we propose a novel method to find the optimal location for the SVC based on a two-step approach. First, an energetic approach based on the combination of the controllability Gramian critical energy analysis with the balanced realization reduction technique is used to search for several feasible locations; then the transient stability is analyzed to compare and determine an optimal location through various test cases. The effectiveness of the proposed method has been demonstrated on the IEEE 39-bus England power system and compared with the modal controllability index.

• 出版日期2016-9
• 单位湖南大学