Dynamic State Estimation Based Protection on Series Compensated Transmission Lines

作者：Liu Yu; Meliopoulos A P Sakis; Fan Rui; Sun Liangyi; Tan Zhenyu

来源：IEEE Transactions on Power Delivery, 2017, 32(5): 2199-2209.

DOI：10.1109/TPWRD.2016.2633410

• Estimation based protection (EBP)
• high impedance faults
• series compensated lines

Series compensated transmission lines challenge legacy protection schemes. In this paper, a dynamic state estimation based protection (EBP) method is proposed to address these challenges. The method requires GPS synchronized measurements at both ends of the line and a high-fidelity model of the protection zone. The paper presents the dynamic model of the protection zone and its impact on the performance of the protection scheme. Numerical simulations show that the method can correctly identify faults, independently of position and type. The paper also compares the proposedmethod versus legacy protection functions such as distance protection and line differential protection. The comparison shows faster detection of internal faults, immunity to current inversion caused by series capacitors (SCs) and improved detection sensitivity for high-impedance faults.

• 出版日期2017-10