Design of Ultracapacitor-Battery Composite Power System for Coal Mine Trackless Rubber Tyre Electric Vehicle

2014 ◽  
Vol 490-491 ◽  
pp. 1116-1119
Author(s):  
Chuan Wei Zhang ◽  
Ming Yu Wang ◽  
Ying Ying Wan
Keyword(s):  
Power System ◽  
Electric Vehicle ◽  
Coal Mine ◽  
Scientific Basis ◽  
Working Principle ◽  
Driving Range ◽  
Technical Basis ◽  
Composite Power System

This paper introduces the characteristics of ultracapacitor, designs the ultracapacitor-battery composite power system of coal mine trackless rubber tyre electric vehicle. Then the composite power system’s structure and working principle are discussed. Moreover, the driving range of coal mine trackless rubber tyre electric vehicle is improved, and this provides the scientific basis and technical basis for coal mine trackless rubber tyre electric vehicle’s application has a certain value.

Analysis of Electric Vehicle Battery Charging and Discharging

2014 ◽  
Vol 556-562 ◽  
pp. 1879-1883 ◽  
Author(s):  
Zhe Ci Tang ◽  
Chun Lin Guo ◽  
Dong Ming Jia
Keyword(s):  
Power System ◽  
Simulation Model ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Control Strategies ◽  
Load Capacity ◽  
Battery Charging ◽  
Electric Vehicle Battery ◽  
Working Principle

The more popular of electric vehicles is, the higher the load capacity of the battery is in the power system, therefore, the charging and discharging technology is particularly important. This paper introduces several electric vehicle battery charging methods commonly used at present, describes working principle of the bidirectional DC/DC converter in detail in the battery charging and discharging process, and the bidirectional DC/DC charging and discharging control strategy. Finally, the electric vehicle battery charging and discharging simulation model is built, the validity of the electric vehicle battery charging and discharging model is verified based on control strategies mentioned herein by use of simulation.

The Solution for Malfunction of the Leakage Protection System Caused by Mine-Used Converter

2014 ◽  
Vol 912-914 ◽  
pp. 1481-1484
Author(s):  
Yan Wen Wang ◽  
Hai Hong Li ◽  
Da Wei Wang ◽  
Zheng Fan
Keyword(s):  
Power System ◽  
Coal Mine ◽  
Protection System ◽  
Normal Operation ◽  
Coal Production ◽  
Actual Situation ◽  
Matlab Simulation ◽  
Zero Sequence ◽  
Working Principle ◽  
Isolation Transformer

The leakage protection system usually trends to make a misjudgment and tripping in normal operation after applying the converter in the coal mine power system. This seriously affects the safety in coal production. Based on the research of the structure and working principle of the converter, it has obtained the definite reason for the converter interfere the leakage protection system. It is the higher harmonics and pulses that generate the zero sequence current through the ground capacitance. Combined with the actual situation in coal mine, it has proposed two corresponding solutions: one is adding the isolation transformer in the output lines of the converter; another is modifying criterion of the leakage protection system. Both methods have their own characteristics, and have verified the feasibility of the methods through the MATLAB simulation.

scholarly journals Powertrain Matching and Optimization of Dual-Motor Hybrid Driving System for Electric Vehicle Based on Quantum Genetic Intelligent Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yong Wang ◽  
Dongye Sun
Keyword(s):  
Global Optimization ◽  
Power System ◽  
Electric Vehicle ◽  
High Performance ◽  
Dynamic Performance ◽  
Power Sources ◽  
Driving System ◽  
Electric Cars ◽  
System Parameters ◽  
Driving Range

In order to increase the driving range and improve the overall performance of all-electric vehicles, a new dual-motor hybrid driving system with two power sources was proposed. This system achieved torque-speed coupling between the two power sources and greatly improved the high performance working range of the motors; at the same time, continuously variable transmission (CVT) was achieved to efficiently increase the driving range. The power system parameters were determined using the “global optimization method”; thus, the vehicle’s dynamics and economy were used as the optimization indexes. Based on preliminary matches, quantum genetic algorithm was introduced to optimize the matching in the dual-motor hybrid power system. Backward simulation was performed on the combined simulation platform of Matlab/Simulink and AVL-Cruise to optimize, simulate, and verify the system parameters of the transmission system. Results showed that quantum genetic algorithms exhibited good global optimization capability and convergence in dealing with multiobjective and multiparameter optimization. The dual-motor hybrid-driving system for electric cars satisfied the dynamic performance and economy requirements of design, efficiently increasing the driving range of the car, having high performance, and reducing energy consumption of 15.6% compared with the conventional electric vehicle with single-speed reducers.

The Control Strategy Of V2G Participating in Peak Regulation in Power System

2011 ◽  
Vol 383-390 ◽  
pp. 4151-4157
Author(s):  
Wen Qi Tian ◽  
Jing Han He ◽  
Jiu Chun Jiang ◽  
Cheng Gang Du
Keyword(s):  
Power System ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Distributed Energy ◽  
Control Center ◽  
Distributed Energy Storage ◽  
New Energy ◽  
Regulation Function ◽  
Control Layer

With the increase of new energy power generation, the requirement of smart grid and the popularity of electric vehicles, the research focus on V2G. With Electric vehicles being distributed energy storage or distributed generation, peak regulation in power system is involved in important functions of V2G. In order to achieve peak regulation function, the paper has analyzed the control relationship between the electric vehicles, V2G station and electric vehicle charge\ discharge control center, presented charge and discharge control strategy based on the two levels of electric vehicle charge\discharging control center and V2G station control layer and introduced algorithms and examples to achieve these strategies.

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