《电工电能新技术》
· Introduction ·
· Contents ·
2016.1
2015.12
2015.11
2015.10
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2015.3
2015.2
2015.1
2014.12
2014.11
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2014.3
2014.2
2014.1
2013.4
2013.3
2013.2
2013.1
2012.4
2012.3
2012.2
2012.1
2011.4
2011.3
2011.2
2011.1
2010.4
2010.3
2010.2
2010.1
2009.4
2009.3
2009.2
2009.1
2008.4
2008.3
2008.2
2008.1
2007.4
2007.3
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2007.1
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· Abstracts ·
2016.1
2015.12
2015.11
2015.10
2015.9
2015.8
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2015.3
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2015.1
2014.12
2014.11
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2014.9
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2014.6
2014.5
2014.4
2014.3
2014.2
2014.1
2013.4
2013.3
2013.2
2013.1
2012.4
2012.3
2012.2
2012.1
2011.4
2011.3
2011.2
2011.1
2010.4
2010.3
2010.2
2010.1
2009.4
2009.3
2009.2
2009.1
2008.4
2008.3
2008.2
2008.1
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2007.3
2007.2
2007.1
2006
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2004

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《电工电能新技术》2016年第1期目录
第35 卷第1 期(总第151 期)  2016 年1 月
目  次

论文报告
IRP 理论和IEEE Std 1459⁃2010 在变流器驱动电机能效测试中的应用比较
 ...

  2014.2

2014.2
  日期:2014-04-01     【背景色 杏仁黄 秋叶褐 胭脂红 芥末绿 天蓝 雪青 灰 银河白(默认色) 】  【字体:
 

Power management strategy of three⁃port Buck & Boost
converter in electric vehicles
CHEN Xu⁃ling, LIU Fu⁃xin
(1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and
Astronautics, Nanjing 210016, China; 2. College of Automation Engineering, Nanjing
University of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract: In the electric vehicle power system with two or more sources, the application of multi⁃port converter
(MPC) instead of several single⁃input converters can simplify the system configuration and reduce the overall cost.
In this paper, a three⁃port Buck & Boost converter was adopted to build up the electric vehicle power system, and
the characteristics of the system in five operation modes were presented. According to the characteristics of each op⁃
eration mode, the corresponding control strategy was proposed. A 1kW prototype was built in the laboratory, and
the experimental waveforms were shown in detail to verify the operating principle of the converter and the effective⁃
ness of the power management strategy.
Key words: electric vehicle; multi⁃port DC converter; power management

Novel push⁃pull forward converter for high reliability and
high input voltage applications
HUA Ming1, JU Wen⁃yao1, XIA Yan⁃bing2, WU Hong⁃fei2, XING Yan2
(1. Nanjing Research Institute of Electronics Technology, Nanjing 210039, China;
2. Jiangsu Key Laboratory of New Energy Generation and Power Conversion (Nanjing University of
Aeronautics and Astronautics), Nanjing 210016, China)
Abstract: A novel push⁃pull forward converter is proposed for high input voltage and high reliability applications.
The converter is constructed by series connecting and coupling two forward cells via an integrated magnetizing core.
Switches’ voltage stress of this converter is clamped at input voltage and the leakage energy and magnetizing energy
of the transformer are recycled. In addition, high reliability can be guaranteed since no direct⁃short path existed in
the converter. All these features make the proposed PPFC suitable for high⁃reliability, high⁃input voltage, and high
power density power conversion applications. Operation principle and detailed analysis of the proposed converter are
given and verified with experimental results.
Key words: DC⁃DC converter; push⁃pull forward converter; high reliability; interleaving series

Simplified model current predictive control of three⁃level rectifier
GU Xin1, ZHANG Ce2, GENG Qiang1, SHI Ting⁃na2
(1. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy, Tianjin
Polytechnic University, Tianjin 300387, China; 2. School of Electrical Engineering and Automation,
Tianjin University, Tianjin 300072, China)
Abstract: In the conventional model of predictive control of three⁃level rectifier, the twenty⁃seven switching vectors
for three⁃level rectifier are evaluated on line based on a discrete⁃time model of the system, and the vector that
makes the cost function smallest will be applied in the next sampling period. But in the practical implementation,
the conventional method can lead to a huge amount of calculations, which contradicts the requirements of the possi⁃
ble low sampling periods since it greatly improves the overall performance of MPC. In order to solve the problem, a
simplified model predictive method is proposed in this paper. Utilizing the sector information of the reference volt⁃
age space vector, the proposed method just evaluates the switching states in the sector. The computational effort has
been greatly reduced while the steady⁃state performance and dynamic response of the current control are improved.
The feasibility and correctness of the control strategy are verified by experimental results at last.
Key words: three⁃level rectifier; model current predictive control; amount of calculations

Study on five level photovoltaic grid⁃connected inverter
based on repetitive and PI control
YANG Hai⁃zhu, LIU Jie, YUAN Song⁃zhen
(School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China)
Abstract: The paper introduces a kind of bidirectional switch type five level inverter, and puts forward the com⁃
pound control scheme in which repetitive control and PI adjustment are combined. Repetitive control can suppress
the periodic perturbation which comes from the network side and load side of the grid⁃connected output current, and
can reduce the total harmonic distortion coefficient of grid⁃connected current. PI adjustment can let the grid⁃con⁃
nected current which is output by inverter track the given reference sine signal in real⁃time, so that the system has
excellent static and dynamic characteristics, and improves the control precision of the inverter. The simulation and
experiments show that the output grid⁃connected current waveform of five⁃level inverter using repetitive control and
PI adjustment is stable, and harmonic distortion coefficient is small and can achieve real⁃time fast tracking the
phase of the network voltage, so that the system can work in the condition of high power factor.
Key words: photovoltaic grid⁃connected; five level inverter; repetitive control

Optimal efficiency control strategy of elevator energy recovery system
based on super capacitor storage and VSC
DENG Zhe1, ZHOU Feng⁃wu2, LV Zheng⁃yu2
(1. Electric Power Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310014, China;
2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: In order to improve the efficiency of the elevator energy recovery system especially when the system is
running in low power load, an optimal efficiency control strategy, which is based on super capacitors storage and
VSC, is proposed. Because the power management of the elevator energy recovery system is all done by VSC mod⁃
ule, the bi⁃directional DC⁃DC is no longer needed in normal operation. And therefore, the energy losses of switches
and inductor filters are avoided. And VSC is turned on and off in accordance with the change of load power. There⁃
fore, the system is always running in the most energy⁃efficient state. Meanwhile, because the load current of capac⁃
itor is well controlled and is split by VSC, the terminal voltage is easily controlled within the operational range. At
last, the simulation and the experiment results verify the feasibility and stability of the control strategy, and about
2􀆰 7% to 13􀆰 9% more energy is saved than VSC working alone.
Key words: super capacitor; four⁃quadrant VSC; energy recovery; energy management
 

Short circuit discharge behavior of capacitive circuit and
its mathematical simulation analysis
ZHONG Jiu⁃ming1,2, LIU Shu⁃lin1, CUI Qiang1
(1. School of Electrical and Control Engineering, Xi􀆳an University of Science & Technology, Xi􀆳an 710054, China;
2. School of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China)
Abstract: The Short Circuit Discharge (SCD) characteristics of the simple capacitive circuit are analyzed based on
the IEC safety spark test apparatus. According to the short circuit discharging waveform of the simple capacitive cir⁃
cuit, the discharge process is divided into three stages, i. e. the first discharge stage, discharging voltage maintai⁃
ning stage and the second discharge stage. Mathematical models of the gas discharge based on field⁃emission are proposed. The relationship between the discharging duration and the capacitance as well as the initial capacitor⁃
voltage is studied through the experiments, and its mathematical expressions are also given with MATLAB by ploy
fitting. According to the discharge current and discharge voltage at the end of the duration, the parameters of the
model are proposed. A soft evaluator is designed with VB. Experiments are given showing the correctness of the
mathematical analysis and feasibility of the non⁃explosive evaluating method proposed.
Key words: IEC safety spark test apparatus; capacitance circuit; short⁃circuit discharge; mathematical simulation

Hysteresis current control with two⁃phase chopping
for permanent magnet synchronous machines
SHEN Jian⁃xin, LU Yuan, Andreas Gassner
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: Hysteresis current control (HCC) is often used to control permanent magnet synchronous machines
(PMSM). In the traditional HCC method, all switching devices of the inverter keep chopping, resulting in remark⁃
able switching loss, especially in those devices which carry high currents. In this paper, a new HCC method is pro⁃
posed. Devices of only two phases which have relatively lower currents keep chopping, making the actual currents
follow their references and also restricting the actual current of the third phase. Devices of the third phase which
contains the highest current have no chopping, only provide a flowing path of the current, i. e. , its upper device is
always on and the lower is always off if the current is positive, and vice versa. Clearly, the actual current of the
third phase can inherently follow its reference. By employing the new HCC method, the inverter switching loss is
reduced and the drive system efficiency is improved, while the current harmonics do not increase. These have been
verified with experimental results.
Key words: hysteresis current control; two⁃phase chopping; switching loss; permanent magnet synchronous ma⁃
chine (PMSM)

Design of MgB2 HTS generator and its rotor structure optimization
HONG Tian⁃qi, YU Hai⁃tao, HU Min⁃qiang
(Electrical Engineering Department of Southeast University, Nanjing 210096, China)
Abstract: Because of ironless rotor in the high temperature superconducting(HTS) generator, its air⁃gap magnetic
field is distorted, which seriously affects the output performance and produces high losses of the generator. These
losses will further affect the cooling system and may cause the superconducting material transiting to the normal con⁃
ducting state. In this paper, the novel high temperature superconducting material MgB2 which is more economic,
easy to manufacture and suitable for process, has been used as field winding to generate high magnetic field in the
air⁃gap. Instead of the traditional magnetic circuit method which is difficult in applying to the situation, the gray
system theory has been introduced to solve the structural optimization design of the field winding, and we use this
theory to minimize the magnetic distortion at the ends of the field coils. With the electromagnetic finite element pro⁃
gramming, we successfully design a 50kW HTS generator.
Key words: HTS generator; MgB2; coreless rotor; air⁃gap magnetic field; distortion

Analysis of current research technology about LED
driver circuit without electrolytic capacitor
ZHANG Neng, ZHANG Bo, QIU Dong⁃yuan
(School of Electric Power, South China University of Technology, Guangzhou 510640, China)
Abstract: Abstact : Light⁃emitting diode (LED) has been the most promising lighting technology in the “National
Green Lighting Project” for its distinct advantages such as high efficacy, long lifespan and environmental friendli⁃
ness. The LED driver requires some good characteristics such as high reliability, long lifetime in addition to high
power density, high efficiency, high power factor and low cost. The electrolytic capacitor with big size and short li⁃
fespan used in the LED drives is not only reducing the driver’s power density, but also limiting the lifetime of the
power supply. So, the drivers without electrolytic capacitor have attracted a lot of attention from both industry and
academic areas. This paper introduces the progress of the study of the non⁃electrolytic capacitor technology in de⁃
tail, including methods and topologies. Analyzing and comparing the key performance of these technologies are also
presented.
Key words: non⁃electrolytic capacitor; LED driver; analysis

Comparison between source current and load current
detection type for active power filters
LI Jing⁃jing, ZHAO Zheng⁃ming, GE Jun⁃jie
(State Key Laboratory of Power System, Department of Electrical Engineering,
Tsinghua University, Beijing 100084, China)
Abstract: With large amounts of power electronic equipments connected to the grid, huge harmonics are injected to
the power system, deteriorating the power quality and threating power grid security. In this case, the study of Ac⁃
tive Power Filter (APF) is essential and necessary for harmonic elimination and power quality improvement. Active
power filters can be classified into two types. One is load current detection type and another one is source current
detection type. In this paper, works focused on the comparison between these two different current detection types
from filtering performance and system stability aspects are presented. Analysis results show that in ideal conditions,
by taking current control loop into consideration, one of these two current detection types can be transferred into the
other. However, in non⁃ideal conditions, source current detection is superior to the load current detection for im⁃
proved compensation precision. However, source current detection type is sensitive to the load disturbance and has
system stability problem. Conclusions are verified by simulation and experiment results.
Key words: active power filter; source current detection; load current detection; system stability

Novel PWM technique with optimal flat top quasi⁃sinusoidal
modulating waveform
WANG Rong⁃sheng, TANG Ning⁃ping, LIN Zhen, HUANG Can⁃shui
(College of Electrical Engineering and Automation of Fuzhou University, Fuzhou 350108, China)
Abstract: An optimized flat top quasi⁃sinusoidal modulating waveform is designed to increase the maximum ampli⁃
tude of fundamental line⁃voltage produced by three⁃phase PWM. The technique uses an asymmetric regular sam⁃
pling approach to modulate the triangular carrier wave. As a result, it produces 19% and 3􀆰 2% higher maximum
amplitude compared to using SPWM and SVPWM, respectively. Compared to SPWM, its total harmonic current
distortion is lower if the modulation index falls M∈ [0􀆰 55, 1], and slightly higher if M∈ [0, 0􀆰 55]; but the
increase is not exceeding 2􀆰 2%. The PWM algorithm in the new technique is simple, and therefore, it will be ap⁃
plicable to real⁃time on⁃line microprocessor or DSP generation. The new technique has been validated with experi⁃
ment results.
Key words: modulating wave; maximum fundamental component amplitude; harmonic calculation; PWM algo⁃
rithm; modulation index

Combined membership function and its application on
fuzzy evaluation of power quality
YANG Jia⁃hao, OUYANG Sen, SHI Yi⁃li, HUANG Rui⁃yi, LIU Zi⁃wen
(School of Electric Power, South China University of Technology, Guangzhou 510640, China)
Abstract: In the fuzzy evaluation process of the power quality, different membership functions can lead to different
results, which affect the credibility of the evaluation. In order to avoid subjectivity of choosing membership func⁃
tion, a combined membership function based on the Variance⁃covariance optimized combination method is pro⁃
posed. Firstly, five typical intermediate membership functions are selected. Secondly, weights of each function are
calculated by the Variance⁃covariance optimized combination method, and then a combined membership function of
general applicability is constructed according to the weights. Thirdly, the fuzzy evaluation is performed by using
this combined membership function. Finally, an application of this combined membership function in the fuzzy e⁃
valuation of power quality of a power supply substation shows that this function can improve credibility of the evalu⁃
ation result.
Key words: power quality; membership function; optimized combination; fuzzy evaluation

Planning of electric vehicle charging stations
considering users’ convenience
GE Shao⁃yun, FENG Liang, LIU Hong, WANG Long
(Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)
Abstract: The main function of electric vehicle charging stations is to provide users with a convenient charging
service. In order to solve this problem, a planning method of electric vehicle charging stations considering the us⁃
ers’ convenience is proposed in this paper. The planning area is divided into several grid zones considering the lim⁃
its of the road network and the charging station’s capacity. The consumption of users driving to the charging sta⁃
tions is used as the objective function and Genetic Algorithm (GA) is applied to solve the optimal problem of how to choose the best location of the charging station in each zone. With repeated calculation and adjustment of the
coverage of grid zones and sites of charging stations, the reasonable planning scheme of electric vehicle charging
stations in the study area is obtained. Finally the feasibility of the model and the method proposed in this paper are
validated by a practical example.
Key words: electric vehicle; charging station planning; road network; users’ convenience

On⁃line condition monitoring system based on AVR MCU
SUN Yi, ZHANG Kuo, QIU Ying⁃hui
(School of Electrical Engineering, North China Electric Power University, Beijing 102206, China)
Abstract: The internal gas pressure of vacuum circuit breakers (VCBs) is a key influencing factor on the electric
properties of vacuum circuit breakers. The dielectric strength of vacuum circuit breakers will decreased with the gas
pressure increasing in vacuum interrupters. This paper introduced a method to detect vacuum arc on⁃line based on
AVR MCU which could reduce the complexity of the system and keep high electromagnetic compatibility perform⁃
ance. By using high order digital filter to separate the power frequency signal and high frequency signal, and by u⁃
sing three phase asymmetric algorithm, tendency judging method, and high order harmonic method to diagnose
comprehensively the vacuum in the arc⁃extinguishing chamber the sensitivity and reliability of the system can be en⁃
hanced. This system used RS485 interface to connect to the computer, which has a long communication distance
and strong anti interference capability. In addition, the RS485 interface is convenient to connect to the computer.
This system is very practical and suitable for promotion.
Key words: vacuum degree; vacuum interrupters; on⁃line detecting; signal processing; digital signal filter


 
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