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Research of Insulation Monitoring Device for the AC Floating Ground Power System of DCS

Author: HuangHai
Tutor: TianJianShe
School: North China Electric Power University
Course: Proceedings of the
Keywords: DCS Floating powered system Insulation monitoring The simulation Virtual instrument
CLC: TM621.6
Type: Master's thesis
Year: 2011
Downloads: 15
Quote: 0
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Abstract


With the development of computer , DCS Distributed Control System in a wide range of applications in the power system , especially in thermal power plants . Most of the power supply system of the DCS floating operation mode, the advantage is little ground short circuit occurs , the current path is not formed and affect the entire system is running to improve the continuity and reliability of supply . But little ground can not be found , it may cause an accident when another grounded or insulation to reduce . A long time, due to the technical means to limit , to find fault line can only rely on the artificial line inspection method . DCS exchange floating power supply system insulation monitoring device so the research has important practical significance . This paper first reviewed the research status and development of the low-voltage power supply system insulation monitoring and fault line selection , according to the actual characteristics of the the DCS floating power supply system , the proposed parallel resistance of line insulation monitor software modeling, simulation , and system analysis to verify the correctness and feasibility of the method . Refer to the basic structure of the virtual instrument , the overall implementation of the insulation monitoring device . Hardware selection and design of the device , the device involved in the main circuit , such as signal conditioning modules , data acquisition modules , open into the open describes the design and implementation of the principle of the module circuit . Software functional structure to determine the system operating modes and monitoring processes , and monitoring software of the system is modular in design and function of the realization of the entire system has been divided , and gave details of the program structure of the various sub-function modules . Finally, a summary of the main research work , and at the same time the need to expand next prospect .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Power plant > Thermal power plants, thermal power stations > Control equipment
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