A novel distance protection algorithm for high resistance grounding faults based on parameter identification

作者：Suonan Jiale^*; Wang Zengchao; Zhang Jiankang; Tong Xiaohu; Dai Ling; Kang Xiaoning

来源：Proceedings of the CSEE, 2011, 31(31): 173-178.

• Analysis and simulation
• Bearing ability
• Distance protection
• Fault equation
• Fault point
• Fault resistances
• Ground faults
• High resistance
• High resistance faults
• High-resistance grounding fault
• Linear differential equation
• Protection domains
• Unknown quantity

In this paper, a novel distance protection algorithm for improving properties of relay in high resistance to ground fault was presented. This algorithm deduces a linear differential equation with three unknown quantities. The core idea of this algorithm is to regard the system after fault point as an inductance and the equation is inferred from accurate fault equation. Theoretical analysis and simulation results prove it applicable to short and mid-range transmission lines, also the bearing ability to high resistance fault and high accuracy of this algorithm, especially in the end of protection domain, which prevent the overreach happening. This algorithm is hoped to resolve the effect of fault resistance to distance protection and be a new and fast distance protection.

• 出版日期2011