Development of an improved multifunction high speed operating current differential relay for transmission line protection

Ito, Hajime; Shuto, I.; Ayakawa, H.; Beaumont, P.; Okuno, Keisuke

doi:10.1049/cp:20010211

Cited by 22 publications

(4 citation statements)

References 1 publication

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“…Many compensation methods have been proposed for overcoming the impact of the capacitive current, mainly based on phasor-domain algorithms or time-domain algorithms [6,8,9]. The phasor-domain compensation methods can effectively deal with the steady-state capacitive current, but cannot deal with the fault transient capacitive current which may be much larger than the steady-state capacitive current.…”

Section: Introductionmentioning

confidence: 99%

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Ultra‐high voltage/extra‐high voltage transmission‐line protection based on longitudinal tapped impedance

Liu

Jian-hui

et al. 2017

IET Generation, Transmission & Distribution

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Section: Introductionmentioning

confidence: 99%

“…Combining j ⋅ Z 2∑ and (1/2)R g together as the resistive part of LTI, Z LTI_a and Z LTI_b could be expressed as (9) and (10).…”

mentioning

confidence: 99%

Ultra‐high voltage/extra‐high voltage transmission‐line protection based on longitudinal tapped impedance

Liu

Jian-hui

et al. 2017

IET Generation, Transmission & Distribution

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“…The methods at present to reduce the adverse influences of distributed capacitive current can be classified into three categories: shunt reactor, capacitive current compensation, compensation algorithm based on Bergeron line model [2]. And several new principles of current differential protection immunity to capacitive current have been proposed [3][4][5][6][7][8][9][10][11][12]. Unfortunately, most of these methods need the parameters of the line capacitance and shunt reactor to implement the compensation, thereby increase the complexity of protective relaying.…”

Section: Introductionmentioning

confidence: 99%

A novel UHV transmission line pilot protection principle based on integrated impedance

Liu

Jiale

Duan

2010

10th IET International Conference on Developments in Power System Protection (DPSP 2010). Managing the Change

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Based on the ratio between the sum of two terminals voltages phasor of the transmission line and the sum of two terminals currents phasor of the same line, which is defined as integrated impedance in this paper, a new ultra high voltage (UHV) transmission line pilot protection principle is proposed. When an outer fault occurs, the integrated impedance reflect the capacitance impedance of the line, its imagine part is negative, and the absolute value of its imagine part is large, when an internal fault occurs, the imagine part of the integrated impedance of the faulty phase is either a positive figure or a negative figure with small mode, According to such a characteristic, whether there is fault in line or not can be distinguished. The new criterion does not need compensating capacitance current, can be applied in the line with or without shunt reactor. Also, it can be easily set. Simulation with EMTP data shows that the presented principle has high sensitivity and reliability.

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“…Current differential protection [1,2] has been widely applied on transmission lines because of its simplicity, high operation speed and excellent performance. However, Bi et al [3] demonstrate that the reliability and sensitivity of the current differential protection working on the long ultra high voltage (UHV)/extra high voltage (EHV) transmission lines will be affected largely by the distributed capacitive current.…”

Section: Introductionmentioning

confidence: 99%

Transmission line pilot protection based on phase segregated model recognition

Jiale

Yang

Song

et al. 2009

IET Gener. Transm. Distrib.

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A new type of transmission line pilot protection based on phase segregated model recognition is presented, since the capacitance model and the inductance model are established, respectively, for the external fault and the internal fault. When the internal fault occurs, the capacitance model error is larger than the inductance model error. When the external fault occurs, the inductance model error is larger than the capacitance model error. By computing the model error, the actual state of transmission lines is obtained. Theoretical analysis and electromagnetic transients program (EMTP) simulation demonstrate that this novel protection principle is unnecessary to compensate the distribution capacitance current and has fast operation speed and good performance on resisting transition resistance and transient components.

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Development of an improved multifunction high speed operating current differential relay for transmission line protection

Cited by 22 publications

References 1 publication

Ultra‐high voltage/extra‐high voltage transmission‐line protection based on longitudinal tapped impedance

Ultra‐high voltage/extra‐high voltage transmission‐line protection based on longitudinal tapped impedance

A novel UHV transmission line pilot protection principle based on integrated impedance

Transmission line pilot protection based on phase segregated model recognition

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