GPS synchronized digital current differential protection for transmission lines

Gao, Houlei; He, Jiali; Jiang, Shifang

doi:10.1016/s0378-7796(02)00029-9

Cited by 16 publications

(3 citation statements)

References 2 publications

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“…To solve this error, many researchers have implemented synchronized sampling GPS time information at all terminals of the protected line [20][21][22][23]. This paper proposes a merger of current and voltage signal trip to get more accurate results or to fix these errors.…”

Section: Results and Analysismentioning

confidence: 99%

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

2014

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Section: Results and Analysismentioning

confidence: 99%

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

2014

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“…To eliminate load current's impact on the sensitivity of the traditional current differential protection and improve its speed, the fault component based instantaneous value current differential algorithm is adopted in this paper [14]. The phase segregated operating criteria for two terminal lines is given by the formula below: ensure sufficient stability to external faults, a tripping logic is designed as follows: Suppose sampling rate is 12 points per fundamental frequency cycle, if there are four samples (successive or not) meeting (2) among the first nine post-fault samples, and the zero-cross times of d i is not more than 2 during the judging process, then give the tripping command.…”

Section: Instantaneous Value Current Differential Algorithmmentioning

confidence: 99%

The current differential and travelling wave based algorithm for ultra high speed hybrid protection

Zou

Gao

2008

2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies

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Basing on the instantaneous value current differential algorithm and the current travelling wave polarity comparison algorithm, this paper proposes a novel hybrid algorithm for ultra high speed transmission line protection. The hybrid protection algorithm retains the advantages of two algorithms: fast fault detection speed and high reliability level, meanwhile, effectively eliminates their disadvantages. The hybrid relay scheme utilizes a set of hardware platform and same communication channel to perform data processing and fault detection. Simulation results coming from EMTDC demonstrate that the combined algorithm is capable of achieving fast fault detection speed while maintaining a high reliability level.Index Terms-current differential algorithm, hybrid protection scheme, travelling wave based protection, ultra high speed.

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“…This paper briefly introduces system architecture of current differential protection for lines between substations [7][8][9], and respectively analyses synchronous solutions based on GPS and IEEE1588. The aim is to provide reference for engineering application of data synchronization of current differential protection between digital substations in future.…”

Section: Introductionmentioning

confidence: 99%

Solution Scheme for Time Synchronization of Current Differential Protection between Digital Substations

Duan¹,

Wu²

2013

EPE

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In digital substations with power transformers, the key to implementation of line differential protection is synchronization of electrical quantities at both two sides. System framework of current differential protection for lines between digital substations is analyzed briefly, as well as the necessity of demand for time synchronization. Principle of time synchronization based on GPS and IEEE1588 PTP (Precision Time Protocol) are introduced. Time synchronization of current differential protection between digital substations based on IEC61850 is discussed. This paper puts forward two solution schemes of time synchronization, analyzes their advantages and disadvantages respectively, and points out that the development direction of time synchronization of differential protection between digital substations is IEEE1588 PTP.

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GPS synchronized digital current differential protection for transmission lines

Cited by 16 publications

References 2 publications

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

Line Differential Protection Modeling with Composite Current and Voltage Signal Comparison Method

The current differential and travelling wave based algorithm for ultra high speed hybrid protection

Solution Scheme for Time Synchronization of Current Differential Protection between Digital Substations

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