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The Adaptive Protection of Power System Research Based on Wide Area Networks

Author: PengHai
Tutor: Wang
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: Power system WAN Adaptive protection Setting Calculation
CLC: TM771
Type: Master's thesis
Year: 2009
Downloads: 271
Quote: 1
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Abstract


With the increasing size of China's power grid , the grid structure and operation is more complex, relay security put forward higher requirements . Relay can achieve the request with the amount of information collected , the protection principle and operating criteria , as well as the tuning settings are correct , there is a direct relationship . Protection of traditional lines with a fixed value strategy to cope with a variety of grid operation mode , when the operation mode is changed to protect the value is not adaptive . And setting value are mostly local amount of information , which makes a lot of difficulties and problems in the setting calculation , setting check . Based on the the WAN adaptive protection using network - wide information to analyze the current operating status of the system , adaptive real - time tuning and adjustment protection settings , can relay in top working condition . Real-time adaptive protection setting must be combined with the current power grid operation mode , the dynamic network topology analysis is one of the key issues to study adaptive tuning , first studied based on the expansion of the adjacent node static network topology analysis and based on local topology modified dynamic network topology analysis . A numerical example , the judgment of the connectivity principle of the method is simple , local topology correction less computation and easy to implement . WAN - based adaptive protection of its essential purpose is to protect the value of adaptive tuning , this paper, the WAN switch displacement - based adaptive value -tuning algorithm and line fault adaptive tuning algorithm . By simulation proved that the switch variable -bit adaptive algorithm can be combined with the system operating mode , effectively extending the scope of protection of the II section protection under the premise of ensuring the protection with the relationship between the meet of selective than conventional segment II protection setpoint higher sensitivity ; the line fault adaptive algorithm running on the system having a strong adaptive capacity on each line adjacent to a higher sensitivity , its scope of protection than the traditional protection setting and switching the adaptive variable - bit protection setpoint range .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system protection > Protection Principle
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