New "repeated replay" methodology for protective relay testing in electrical power system /
The response of a relay for any fault or event that happened in the power system is dependent on the pre-fault operating state of the system and the fault condition. For the given system operating state and fault condition, the response of a relay varies with the design type and the settings of the...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=743266391&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | The response of a relay for any fault or event that happened in the power system is dependent on the pre-fault operating state of the system and the fault condition. For the given system operating state and fault condition, the response of a relay varies with the design type and the settings of the relay. The response changes also with the algorithm type and algorithm parameters, if the relay is digital. Through the review of distance relays and digital distance relay algorithms, and the analysis of digital distance relay performance, the dependency of the relay response on the above mentioned conditions has been shown and detailed. It is difficult to get this dependency quantified. This means that application and transient tests of relays axe necessary for the study. Today, real-time transient relay testing seems to be the best testing method, but this method requires real-time transient simulation. Fortunately, the non-real-time and interactive transient relay test method can be used as an alternative to it with the same test results. This test method is open-loop and iterative. Traditionally, if this method is used to test the protective system of a transmission line, the digital transient simulator is required with two or more terminals corresponding to the two or more relays of this protective system. A new non-real-time and interactive digital transient relay test method for transmission line protection has been developed. Two or more relays are tested in turn in every test iteration. Digital transient simulator is required with only one terminal. It needs simulation neither of the communication between the tested relays nor of the synchronization of the terminals since only one terminal is used. So, the simulator for the new test method is simpler and cheaper than ones for the real-time and traditional non-real-time test methods, The new "repeated replay" transient test method has been used in two distance relay applications. The dissertation describes the both application tests and gives the test results. In order to confirm the new relay test method, the relay tests for one given relay application are done twice more, using the traditional non-real-time interactive and real-time transient relay test methods respectively. The similar test results between the new "repeated replay" method and the other test methods prove that the new transient relay test method is feasible and dependable. |
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| Item Description: | Vita. "Major Subject: Electrical Engineering". |
| Physical Description: | xv, 272 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |