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High-voltage switchgear and motor with circuit protection device of adaptive

Author: YanZhiBin
Tutor: YinXiangGen
School: Huazhong University of Science and Technology
Course: Proceedings of the
Keywords: Transmission Line Electric motor Simulation High Voltage Switchgear Adaptive protection
CLC: TM77
Type: Master's thesis
Year: 2005
Downloads: 160
Quote: 1
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Abstract


Research goal is to solve adaptive protection of traditional conservation problems and further improve the protection of performance. Papers on power lines and high voltage switchgear using adaptive motor protection device research topic to start on. Firstly, the characteristics of the Adaptive Protection Survey and development direction , based on the analysis of the distribution system and motor protection circuit research and development status and shortcomings, then put forward line protection and motor protection adopted in the adaptive protection scheme . For line protection , this article uses the line phase current differential protection criterion as adaptive fault characteristic quantity , the text of the phase current differential characteristics of the theoretical analysis and the use of ATP-EMTP simulation of its characteristics . For motor protection , this paper presents the motor running real-time detection program , so that the motor current protection setting value according to the motor running adaptive adjustment ; article further elaborated on the use of machine -side impedance variation rate as the fault characteristic quantity , to achieve the motor starting process stall protection programs ; article also take advantage of the dynamic simulation tool MATLAB SIMULINK an asynchronous motor starting process simulation model, simulation results verify the correctness criterion . The traditional inverse time protection characteristic curve delay calculation errors exist larger problem, this paper proposes a new inverse time protection characteristic curve algorithm to improve the delay accuracy . Improved combination principle , this paper also used for high voltage switchgear protection and monitoring device research and development work were discussed, including those based on the principle of adaptive line and motor protection scheme , has the versatility to use high voltage switchgear and control functions to protect the hardware platform, as well as line and motor protection devices software solutions .

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