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Analysis of Transition and Thermal Calculation of Stator for Pumped Storage Generator

Author: LiuPingAn
Tutor: GeBaoJun；HanZuYin
School: Harbin University of Science and Technology
Course: Electrical Engineering
Keywords: Pumped Storage Motor Back-to-back starts Static frequency converter The transition process Temperature
CLC: TV734
Type: Master's thesis
Year: 2007
Downloads: 164
Quote: 0
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Abstract


Pumped Storage Power Station on the power system peak shaving and valley filling and improve power system economics , reliability an effective means . The pumped storage motor is an important part of the pumped storage power station , starter is large pumped storage power key issues of the transition process . Pumped Storage motor starter usually : auxiliary motor starting ; asynchronous start ; synchronous back-to-back start ; static frequency converter start ; semi-synchronous start . In which the back-to-back starting spare starter , static frequency converter start is the most popular and commonly used starting mode . This paper first introduces the pumped storage power station at home and abroad and its crew overview of the development of pumped storage motor starting studies were reviewed . According to the existing literature summarized in back-to-back start the process model , the motor instance of the pumped storage simulation has been pumped storage in the back-to-back in the starting process of the motor stator current , speed , excitation current and electromagnetic torque such curve . Research pumped storage motor static frequency converter start literature , the mathematical model is equivalent to the damper bar into a loop to calculate , which makes the damping of the current analysis of the starting process is very inconvenient . Based on multi-loop theory of the AC motor , the establishment of a mathematical model of the actual arrangement of the damper windings , and the pumped storage motor , for example , the simulation of the pulse and natural static frequency converter start - up process two different operational phase , the a static frequency converter start - up process in the stator and rotor current , speed , electromagnetic torque and damper bar current variation . Also the inverter capacity and start-up time when the pumped storage motor inverter start line simulation to identify the relationship between the inverter capacity and start-up time . Finally, using the finite element method runtime pumped storage motor rated the stator steady state temperature field was calculated and compared with experimental results , calculated good agreement with the experimental results .

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CLC: > Industrial Technology > Hydraulic Engineering > Hydropower utilization of hydropower project > Hydropower station construction and equipment > Mechanical and Electrical Equipment
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