A Fault Steady State Component-Based Wide Area Backup Protection Algorithm

Real-time accurate voltage phase angle measurement data has a very important significance to monitor and analyze the power system, and phase angle measurement principle of Fourier transform plays an important role in the theoretical calculations and engineering applications. The dynamic sinusoidal voltage signal contains two parts of the sinusoidal steady-state component and decaying DC component, and the decaying DC component having a continuous spectrum, at the frequency corresponding to the sinusoidal steady-state component must have a non-zero value, making dynamic signal phase than steady signal phase has one extra deviation angle. Considering Fourier transform method and theory of engineering application are different, this paper only considered the application conditions of time truncation, analyzes continuous Fourier transform under a real eigenvalue and a pair of conjugate complex roots condition, then compared with the theoretical calculation, for the two case of limited time integration and theoretical calculation condition, the phase angle difference and influencing factors are given.

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PHASOR MEASUREMENT UNIT BASED WIDE AREA BACKUP PROTECTION SCHEME FOR POWER TRANSMISSION LINES

Energy Procedia ◽

10.1016/j.egypro.2017.05.243 ◽

2017 ◽

Vol 117 ◽

pp. 1172-1181 ◽

Cited By ~ 3

Author(s):

A. Rathinam ◽

S. Vanila ◽

Ch. Harika

Keyword(s):

Transmission Lines ◽

Power Transmission ◽

Phasor Measurement Unit ◽

Wide Area ◽

Measurement Unit ◽

Power Transmission Lines ◽

Backup Protection ◽

Protection Scheme ◽

Phasor Measurement

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Wide-Area Measurement-Based Backup Protection for Power Network With Series Compensation

IEEE Transactions on Power Delivery ◽

10.1109/tpwrd.2013.2294183 ◽

2014 ◽

Vol 29 (4) ◽

pp. 1970-1977 ◽

Cited By ~ 44

Author(s):

Paresh Kumar Nayak ◽

Ashok Kumar Pradhan ◽

Prabodh Bajpai

Keyword(s):

Area Measurement ◽

Wide Area ◽

Power Network ◽

Series Compensation ◽

Backup Protection

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Wide-Area Backup Protection Algorithm Based on Earth Impedance Comparison Principle

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.513-517.858 ◽

2014 ◽

Vol 513-517 ◽

pp. 858-862

Author(s):

Zhen Xing Li ◽

Qiu Li ◽

Tao Zhang

Keyword(s):

Area Measurement ◽

Wide Area ◽

Differential Protection ◽

Circuit Breakers ◽

Backup Protection ◽

Wide Area Measurement System ◽

Component Identification ◽

Current Differential Protection ◽

Protective Relays ◽

Bus Voltage

A novel algorithm is proposed for the purpose of improving the reliability and sensibility of fault component identification of wide area backup protection. The algorithm, called earth impedance comparison protection (EICP), is realized by comparing the ratios of different nodes, and the ratio is obtained by the bus voltage to the differential current. The advantages of EICP are verified in this paper using the measurement function of wide-area measurement system. The results of case studies show that EICP is superior to the current differential protection in terms of the sensitivity and to the directional pilot protection in terms of the dependability. The satisfactory results can be obtained when the EICP method is applied in the event of abnormal operations of protective relays and circuit breakers, measurement error scenarios or substation DC failure.

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