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Research on Rank Difference and Working Characteristics for Pulling into Step of Double-fed Speed Regulating System

Author: FengMingYuan
Tutor: DuQingZuo
School: Henan Polytechnic University
Course: Control Theory and Control Engineering
Keywords: Bivariate control Maximum speed differential Doubly Fed governor Operating characteristics
CLC: TM921.51
Type: Master's thesis
Year: 2009
Downloads: 28
Quote: 0
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Abstract


In this paper, based on in-depth investigation and analysis , the expansion and renovation of the coal mine fans, pumps and other old-fashioned winding motor purpose, combined with bivariate pulse cycloconverter , the basic principle of the double-fed energy-saving speed , pull into the synchronization point the differential depth research and work characteristics . The paper first describes the 6-pulse cycloconverter dual variable control theory , and the third of the frequency for example two variables determine . And then analyzed the basic operating principle of the double-fed motor speed , double-fed motor speed of the rotor side inverter power analysis based on vector maps and the power flow diagram of the the Doubly Fed governor five run state . Followed in accordance with the requirements of the operation of the coal mine winding motor segmented differential control strategy to meet the motor pull-in synchronization speed differential , and as a basis for the theoretical speed the differential table and governor characteristic curve . Establish a system simulation model , through simulation , to verify the correctness of the doubly fed the feasibility of starting and pulling into the maximum speed of the synchronization point differential . Then based on the dual - feed speed control system to achieve performance requirements , design starting and loading system of the double-fed . Finally, the experimental study , the transition process of the major experiments including the starting characteristics of the doubly-fed speed control system , speed characteristics, electric to power generation , and eventually pull into synchronization point maximum allowable speed differential for 4% of the rated speed conclusion , to verify the conclusions of the theory and simulation . Study on the basis of steady-state operating characteristics of the doubly-fed speed control system , V-shaped curve of the doubly-fed speed control system under different conditions . A large number of experimental and simulation results show that the wound rotor power dual variable pulse CYCLOCONVERTER doubly-fed speed control system is running , stable performance , better meet the coal mine fan , energy efficiency and the expansion and renovation of the pump load practical needs .

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CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electric drive ( electric drive ) > Control system > Variable frequency control system
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