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Research and Design on Grounding System of Huizhou Pumped-storage Power Station

Author: LiangJian
Tutor: QiuDongYuan；JiangNan
School: South China University of Technology
Course: Electrical Engineering
Keywords: Pumped Storage Power Station Grounding System Design Grounding resistance
CLC: TV743
Type: Master's thesis
Year: 2010
Downloads: 72
Quote: 0
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Abstract


Grounding system is to ensure the safe and reliable operation of power system , important measures to protect the safety of operating personnel and electrical equipment . With the rapid development of China's national economy , the electric power system capacity is expanding rapidly , increased short circuit current into the ground , to lower the value of the grounding resistance of the grounding system . However Pumped Storage Power Station general site better rock underground cavern , soil resistivity , a wide range of hydraulic hub layout , the upper and lower reservoir divide , how these soil resistivity is high , you can take advantage of the limited area the case effectively reduce the grounding resistance , improve the distribution of surface potential to improve the security of the plant operation , reliability , pumped storage power station designers are very concerned about the problem . To this end, this paper Huizhou Pumped Storage Power Station grounding system design , to provide a reference for the design and implementation of Huizhou Pumped Storage Power Station grounding system . The main content of the paper the following aspects : 1 , in accordance with the characteristics of the pumped storage power station theoretically deduced physical model and computational model of the pumped storage power station ground grid , and then using the boundary element method to derive its integral equations and boundary integral equation . Detailed design of the grounding grid layout of Huizhou Pumped Storage Power hub , Huizhou Pumped Storage Power Station earthing grounding resistance value of the actual layout of the modeling , calculation and analysis of the various physical quantities such as the dielectric boundary , cross-sectional scores and medium resistivity the impact of parameter changes on the station ground resistance , the methods and principles of Huizhou pumped Storage Power Station ground grid design . Frequency withstand voltage characteristics of the control cable , test frequency volt-second characteristic also of secondary devices work best allowable value increased to determine the potential of the ground network to provide the basis . To ensure the safe operation of the electrical equipment and personal safety , isolation and equalizing measures taken in Huizhou Pumped Storage Power Station ground grid design . Checking ground network of contact potential difference and step potential difference , checking 6 ~ 10kV power plant valve type arrester action , to ensure that the ground network of Huizhou Pumped Storage Power Station to meet the checking condition . 4 , we describe the the ground measurement process , verify that the the grounding resistance measured and calculated values ??match . Contact, step potential difference is less than the allowable value .

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CLC: > Industrial Technology > Hydraulic Engineering > Hydropower utilization of hydropower project > A variety of Hydropower > Pumped storage hydropower station
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