Accelerated trip scheme for second-zone distance protection

Sidhu, T.S.; Ye, P.; Sachdev, Manoj

doi:10.1049/ip-gtd:20030197

Cited by 13 publications

(3 citation statements)

References 2 publications

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“…Due to signaling-related costs, reliability and technical issues, non-communication AST methods attract more consideration than communication ones. Various noncommunication AST methods have been proposed thus far [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Depending on whether the high-frequency components or fundamental-frequency components of fault signals are used, these methods can be divided into two groups.…”

Section: Introductionmentioning

confidence: 99%

“…Despite providing acceptable performance, methods of the former group require special wideband measurement devices for extracting the transient characteristics of the fault signals [2][3][4]. The methods based on fundamental-frequency phasors are more practical for they only require signals that are normally fed to distance relays as inputs [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…AST under end-section faults can be achieved by tracking the change that the currents of sound phases undergo after operation of the remote-end CB (ORCB) [5][6]. The variation of symmetrical components of voltage and current signals at the relay location are used in [7][8][9][10] to infer ORCB. The presence and magnitude of symmetrical components can be used to conclude whether the system is in balanced operation.…”

Section: Introductionmentioning

confidence: 99%

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Noncomunication Accelerated Sequential Tripping for Remote-End Faults On Transmission Lines

Azizi

Sun

Terzija

et al. 2019

2019 IEEE Milan PowerTech

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Short-circuit faults close to each end of a transmission line are normally cleared with some time delay by the distance relay at the opposite end of that line. To reduce this time delay, the pilot relaying schemes use communication links. This paper presents a non-communication method that provides high-speed distance relaying over the entire transmission line length. Similar to conventional distance relays, the proposed method requires voltage and current signals at the relay location as well as the impedance parameters of the protected line as inputs. Accelerated sequential tripping (AST) for faults on the endsections of the line is achieved by using the signals measured from the fault inception to several cycles after the operation of the remote-end circuit breaker (ORCB). The results show that the use of post-ORCB signals would accurately yield the fault distance. Two indices for detecting three-and single-pole ORCB are proposed so as to fulfil the prerequisite for accurate fault distance estimation and generating a trip command, if needed. The proposed method is successfully validated by conducting more than 10000 simulation cases on the 39-bus test system using DIgSILENT PowerFactory.

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