A new directional relay based on the measurement of fault generated current transients

Bo, Z.Q.; Johns, A.T.; Aggarwal, Ruchi

doi:10.1049/cp:19970069

Cited by 23 publications

(3 citation statements)

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“…So we adopt over current protection as the main protection of the distribution network. due to the principle of substation integrated protection,integrated protection is applied to different regions of distribution network according to system buses and power supplies [11]. Thus the integrated protection is applied to regions of microgrid.…”

Section: Figure2a Centralized Integrated Protection System Based On C...mentioning

confidence: 99%

An Integrated Protection of Micro-Grids Based on Bi-Directional Blocking Principle

Liu

Sun

2012

AMR

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Reliable and accurate microgrid protection is significant for micro-grid operation.traditional proection methods can not meet the requirements of microgrid.this paper discusses the problems of the existing micro-grid protection methods. Then proposed a new microgrid protection scheme which uses integrated protection as the main protection of microgrid. this protection scheme is based on bi-directional blocking principle,which will send blocking signal if there is no fault .thus protects microgrid. The proposed method is proved to be an effective method for microgrid.

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Section: Figure2a Centralized Integrated Protection System Based On C...mentioning

confidence: 99%

An Integrated Protection of Micro-Grids Based on Bi-Directional Blocking Principle

Liu

Sun

2012

AMR

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“…Sanderson and his associates [62,63] worked on fast unit protection of multiterminal lines and presented a method based on directional comparison, which is based on the evaluation of the current direction at the terminal with the largest voltage change. Bo and his coworkers [64,65] presented a new directional comparison technique that compares the polarity of fault-generated transient current signals in the system with a two terminal transmission line.…”

Section: Directional Comparison Based Algorithmmentioning

confidence: 99%

Trends in Adaptive Distance Protection of Multiterminal and Double-Circuit Lines

Bhalja

Maheshwari

2006

Electric Power Components and Systems

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With the changing technologies in the field of power system relaying, new protection concepts addressing new technologies are coming to the market. Therefore we need to keep track of international experiences and activities taking place in the field of modern protective systems. This paper gives a bibliographical survey, mathematical formulations, and general backgrounds of research and developments in the field of protection of multiterminal lines and double-circuit lines during the past 50 years, based on more than 100 published articles. Different techniques for parallel line protection and various methods for multiterminal lines are studied and an evaluation of them is undertaken with their advantages and disadvantages for identification of optimum technique as applied to specific applications. At the end, the philosophy of a new adaptive digital distance relaying scheme is also conceptualized. The collected literature has been divided into many sections so that new researchers do not face any difficulty in carrying out research in any specific area of the next generation's adaptive distance protection.

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“…The traveling wave based protection possesses the fastest operation, but when the faults happen at a voltage inception angle close to the zero, they could not generate the significant traveling wave, and the traveling wave measurement is also affected by the bandwidth limitation of the transducers. The principles based on the fault generated high frequency transient components have been proposed in [4][5][6][7]. The direction comparison based on transient current signals is directly comparing the polarity of the transient current, which does not require the voltage signal to decide the direction.…”

Section: Introductionmentioning

confidence: 99%

Transient polarity comparison based protection for system with power electronic interfaced distributed generation units

Kong

Chen

Bo³

et al. 2007

2007 42nd International Universities Power Engineering Conference

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3) AREVA T&D automation and information system, Stafford, U.K ABSTRACTVarious distributed generation units (DGs) are connected to utility power grid. With the advances in power electronics technology, many electronics converter interfaces have been utilized in DGs. The power balance control strategies can be achieved by the flexible control modes of the power electronics converter. However, because of the dynamic response and adjustment ability of the electronics converter interface, the disturbance phenomena caused by the faults are not so distinct that the sensitivity and reliability of the relay may be decreased. This paper presents transient polarity comparison based protection for system with power electronics interfaced DGs. The relays are connected to the current transducers (CTs) at both ends of the protected line to extract the fault transient signals. The polarities of the fault transient signals at both ends of the protected line are compared to determine whether a fault is inside or outside the protected line. A typical distribution power system with power electronics interfaced DGs is simulated. Various tests with respect to various fault conditions are conducted. Results show that the presented technique can correctly distinguish between internal and external faults. The technique is simple in application and fast in operation.

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A new directional relay based on the measurement of fault generated current transients

Cited by 23 publications

References 0 publications

An Integrated Protection of Micro-Grids Based on Bi-Directional Blocking Principle

An Integrated Protection of Micro-Grids Based on Bi-Directional Blocking Principle

Trends in Adaptive Distance Protection of Multiterminal and Double-Circuit Lines

Transient polarity comparison based protection for system with power electronic interfaced distributed generation units

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