《电工电能新技术》
· Introduction ·
· Contents ·
2016.1
2015.12
2015.11
2015.10
2015.9
2015.8
2015.7
2015.6
2015.5
2015.4
2015.3
2015.2
2015.1
2014.12
2014.11
2014.10
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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
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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2015.5
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2015.3
2015.2
2015.1
2014.12
2014.11
2014.10
2014.9
2014.8
2014.7
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
2007.4
2007.3
2007.2
2007.1
2006
2005
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
 ...

  2015.12

2015.12
  日期:2016-01-07     【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:
 

DC short⁃circuit fault protection strategy of multiterminal⁃HVDC systems
LUO Yong⁃jie1,2, LI Yao⁃hua, LI Zi⁃xin, WANG Ping
(1. Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering,
Chinese Academy of Sciences, Beijing 100190, China; 2. University of Chinese Academy
of Sciences, Beijing 100049, China)
Abstract: DC short⁃circuit fault ride through capability is one of the main issues in applications of multi⁃terminal
voltage source converter based high voltage direct current (VSC⁃MTDC) transmission systems. In this paper, the
model of the full⁃bridge modular multilevel converter (FB⁃MMC) is analyzed. A dc short⁃circuit fault protection
strategy for FBMMC⁃MTDC is proposed, including the converter protection control strategy and the system protec⁃
tion scheme. Benefit from the topology property, the FB⁃MMC has the capability of quick fault elimination with the
valves blocked. And then, the MTDC system restarts quickly after clearance of dc fault without need to cut off the
ac grid. The proposed protection strategy is demonstrated on simulation model in PSCAD/ EMTDC. Simulation re⁃
sults verify the feasibility and effectiveness of the strategy. Key words: multi⁃terminal HVDC; DC fault; full bridge modular multilevel converter; momentarily block; STAT⁃
COM operation in parallel

Study on detection method of DC arc fault in PV systems
LIN Fang⁃yuan, SU Jian⁃hui, LAI Ji⁃dong
(Research Center of Photovoltaic Systems Engineering of Ministry of Education,
Hefei University of Technology, Hefei 230009, China)
Abstract: Arc fault has been the main reason for causing fire in the photovoltaic products. Understanding the be⁃
haviors and finding a method to detect the DC arc fault are of great importance to ensure the safety and reliability of
the PV systems. In this paper, an arc fault testing device was designed. A variety of tests were conducted in order
to study the influence of different factors to the arc fault by measuring the voltage and current of the DC arc fault,
such as putting the photovoltaic panels under different working points to study the relations between the arc fault and
the working points, setting a series of gas length of the electrodes to study the influence on the current of arc fault,
setting the arc fault occurring at various locations etc. Then based on the experiment results, features of the current
both in the time and frequency domain were extracted as fingerprint recognition for the artificial neural network to
detect the arc fault. Analysis and experimental results show this method is workable. Key words: PV systems; DC arc fault detection; arc fault features; BP neural network

Control strategy of three⁃phase Z⁃source grid⁃connected
inverter for direct⁃drive wind generation system
ZHANG Yang, HUANG Shou⁃dao
(College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)
Abstract: This paper presents a wind turbine generation system based on the Z⁃source inverter, which has Buck⁃
Boost character and higher reliability. By taking voltage⁃source ZSI as an example, this paper provides a three⁃
phase Z⁃source grid⁃connected inverter control strategy, based on the improved boost control and shoot⁃through
modulation strategy. The simulation results prove that the control strategy can improve the dynamic performance and
the system stability. Key words: Z⁃source inverter; PMSG; shoot⁃through; grid⁃connected

New direct current control method for STATCOM
based on voltage space vector
SHI Li⁃ping, LI Jia⁃jia, MA Yan⁃hong, CAI Ru⁃jun, LIU Peng, LUO Peng, XIE Zhao⁃wen
(School of Information and Electrical Engineering, China University of
Mining and Technology, Xuzhou 221008, China)
Abstract: In order to ensure the low switching frequency and high compensation precision and fast response for the
low voltage STATCOM, the paper analysed the constraint conditions of equivalent error voltage and basic principle
of low voltage STATCOM voltage space vector and internal model controller, and then proposed an improved double
loop control method. A double hysteresis current control method based on voltage space vector is used in the current
loop. The hysteresis inner loop was used to transient state to improve the compensation precision and response
speed. The hysteresis outer loop was used to the steady state reducing the switching frequency. An internal model
controller was used for main controller which was not sensitive to the change of system parameters. The experiment
showed that this method can accurately track the order current in the system steady state and can respond quickly to
changes in the system load during the transient condition.
Key words: low voltage STATCOM; internal model controller; double hysteresis current control; voltage space vector


Model predictive control for two permanent magnet synchronous motors
with five⁃leg voltage source inverter
GU Xin, JIANG Bo, GENG Qiang, LIU Tao
(Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy,
Tianjin Polytechnic University, Tianjin 300387, China)
Abstract: A model predictive control strategy is proposed for two three⁃phase magnet synchronous motors with five⁃
leg voltage source inverter in this paper. The mathematic model of the two motors with five⁃leg inverter is analyzed
based on space vector modulation. The suitable voltage vector could be selected by the model predictive control
strategy based on the mathematic model. The dynamic response time could be shortened, and the speed of two mo⁃
tors could be controlled independently. The validity of this strategy is verified by the simulating experimental re⁃
sults.
Key words: five⁃leg inverter; permanent magnet synchronous motor; model predictive control; space vector

Deduction of instantaneous power theory of multi⁃terminal
circuit in three⁃phase three⁃wire circuit
YANG Xiu⁃chuan1, TIAN Ming⁃xing2
(1. State Grid Ningxia Electric Power Training Centre, Yinchuan 750001, China;
2. School of Automation & Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)
Abstract: In view of the traditional power theory based on the definition of phase voltage is no longer valid under
the circumstance of distorted voltage and current, the concept of multi⁃terminal circuit is proposed. Take the three⁃
phase three⁃wire circuit as an example, which is treated as the three⁃terminal circuit. Definitions of its terminal
voltage and current are proposed in this paper while the instantaneous active power and reactive power are defined
using instantaneous terminal voltage and current. The expressions of instantaneous active power and reactive power
are deduced under three conditions respectively, which both the current and voltage are sinusoidal and symmetric,
the voltage is sinusoidal and symmetrical while the current is distorted and asymmetric and both the current and
voltage are distorted and asymmetric. The results of them are the same as the expressions deduced under the instan⁃
taneous power theory. According to this, the definitions of instantaneous active power and instantaneous reactive
power of three⁃terminal circuit are given.
Key words: multi⁃terminal circuit; three⁃terminal circuit; distorted and asymmetric; instantaneous power

Research on islanding identification method for distributed generation
based on harmonic impedance characteristic function
DAI Yun⁃xia, SU Jian⁃hui, LIU Ning, ZHANG Jun⁃jun
(1. School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China;
2. China Electric Power Research Institute, Nanjing 210003, China)
Abstract: A new passive islanding detection method for distributed generation (DG) is studied which is mainly
used for detecting the islanding in power balance, and therefore the concept of virtual and real impedance is pro⁃
posed. In non⁃islanding grid⁃connected operation conditions, due to the presence of grid voltage, the impedance
value obtained by grid⁃connected current and voltage is actually virtual impedance; when islanding occurs, imped⁃
ance values obtained is the actual impedance. The new method exploits difference between virtual and real imped⁃
ance and harmonic distortion of grid system to construct harmonic impedance characteristic function which is used
for extracting features and then to detect islanding operations by BP neural network. Theory and experiments show
that, the features extracted from characteristic function obviously different before and after islanding are helpful for
islanding detection; and the islanding detection method is feasible and effective.
Key words: DG; islanding detection; characteristic function; BP neural network

Study on long line induction voltage under
transmission lines based on ATP
GAN Yan, LI Hui⁃hui, ZHOU Tao⁃tao, AN Chen⁃fan, DU Zhi⁃ye, RUAN Jiang⁃jun
(1. Central China Grid Company Limited, Wuhan 430077, China; 2. College of
Electrical Engineering, Wuhan University, Wuhan 430072, China)
Abstract: The study of the induced voltage and the energy stored of conductors under transmission lines is always a
research focus of the electromagnetic environment. This paper used the electromagnetic transient software EMTP ⁃
ATP to analyze the induced voltage of suspended long conductors near the ground under 500kV transmission lines
and then compared the calculation with the results of ANSYS software. The comparison implies that the induced
voltage of a long conductor is still the electrostatic induction voltage rather than the electromagnetic induction volt⁃
age. Based on the building models of ATP, electrostatic induction energy of the long conductors with different ar⁃
rangement is calculated under the condition of power frequency electromagnetic field for transmission lines that
meets the design requirements. It shows that the electrostatic energy of a conductor which is 0􀆰 5 m high from
ground and 20 m long is 0􀆰 2mJ, which may cause electric shock. As for a long conductor of 1 m long and 0􀆰 5 m
high from ground, its static energy stored also cannot be ignored. Therefore, for the workers who use metal tools
under the transmission lines must take measures to prevent from electric shock.
Key words: transmission lines; ATP; long conductors; electrostatic induction; transient energy

Design of pantograph arc experiment system and study on radiated noise
GUO Feng⁃yi, ZHANG Yan⁃li, WANG Zhi⁃yong, WANG Bao⁃wei, WANG Xi⁃li, ZHANG Jian⁃fei
(Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China)
Abstract: In recent years, with the continuous increasing running speed of electric locomotive, pantograph arc be⁃
comes more and more serious and has become a kind of security risk of electric railways operation. To further study
the formation mechanism and suppression methods of pantograph arc, a pantograph arc experimental system was de⁃
veloped. The system realizes the simulation of pantograph arc in a shielded environment. Using this test system, by
controlling the contact pressure, current and speed, we performed a set of pantograph arc radiation electromagnetic
noise measurement experiment. The results showed that the electromagnetic noise interference of the pantograph⁃
catenary system is mainly in the frequency band of 30M ~ 500MHz, and the strongest band is in 30M ~ 60MHz.
With the increase of contact current, electromagnetic noise amplitude increases gradually as well as the interference
frequency bands. With the increase of contact pressure, electromagnetic noise amplitude firstly increases and then
decreases, and the interference frequency bands firstly become narrow and then widen. Key words: pantograph arc; electromagnetic noise; radiation noise; sliding electrical contact

Approach for power harmonic analysis based on Nutall window
and synthesized phase difference correction
LIU Hai⁃sheng, CHEN Wen⁃li, FU Zhi⁃hong, ZHANG Huai⁃qing
(1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology,
Electrical Engineering College of Chongqing University, Chongqing 400044, China;
2. Electric Power Experimental Research Institute of Chongqing, Chongqing 401123, China)
Abstract: The fast Fourier transform(FFT) has already become a main method of the electrical harmonic analysis
since it is easily realized in embedded system. In the process of widespread adoption of the AC sampling, there
were difficulties in performing synchronized sampling and integral period truncation in the electric power harmonic
analysis. To eliminate the leakage of the spectrum generated by the synchronization error in the sampling process,
the approach for power harmonic analysis based on Nutall window synthesized phase correction were proposed. The
traditional phase spectrum correction method is improved, and the harmonic signals are weighted by Nutall window,
the FFT analysis is carried out twice by time shift and symmetrical windows of different lengths. The discrete spec⁃
trum corresponding to the peak spectrum phase is used to obtain the phase and frequency correction, and the
fundamental and harmonic parameters formula is derived. The simulation results show that, suggestions for impro⁃
ving the phase difference correction algorithm can effectively improve the accuracy of the harmonic analysis, name⁃
ly, the fundamental amplitude measurement error is <0􀆰 00001%, the fundamental phase error is <0􀆰 01 degrees,
and 2nd ~21st harmonic voltage measurement error is <0􀆰 01%, the measurement error of harmonic phase is less
than 0􀆰 09 degrees, and it provides the possibility for real⁃time energy measuring.
Key words: harmonic analysis; spectral leakage; FFT; phase difference

Research on thermal characteristics and thermal model of
EVs lithium⁃ion battery
LEI Zhi⁃guo, ZHANG Cheng⁃ning, LEI Xue⁃guo, LI Jun⁃qiu
(1. School of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University,
Fuzhou 350002, China; 2. National Engineering Laboratory for Electric Vehicle, Beijing Institute
of Technology, Beijing 100081, China; 3. Fujian Wanrun New Energy Technology Co. Ltd. ,
Fuzhou 350100, China)
Abstract: The performance and cost of electric vehicle depend on the performance and lifetime of battery package,
and the heat of charge⁃discharge thermal of battery influences the performance and lifetime of battery package. This
paper researches charge⁃discharge thermal characteristics of 35A·h@ 3􀆰 7V lithium⁃ion battery in normal tempera⁃
ture and cold temperature. The thermal model of the lithium⁃ion battery is established based on the Bernardi heat
generation rate. The result shows that the battery temperature increases rapidly as the discharge current increases,
and the heat generated in charge⁃discharge can be used to improve charge⁃discharge performance of battery in low
temperature. The thermal model of the power battery based on the Bernardi heat generation rate can simulate the
heat generation of battery during the discharge accurately. It provides a reference for subsequent power battery ther⁃
mal management system research.
Key words: electric vehicle; lithium⁃ion battery package; thermal characteristic; thermal model

Method study on improving dielectric strength of air gap
of transmission lines
HUO Feng, LI Xiao⁃bin, ZHANG Hu, XU Tao, YE Qi⁃ming
MA Ye⁃ming, XIONG Zi⁃teng
(1. China Electric Power Research Institute, Wuhan 430074, China;
2. School of Electrical Engineering, Wuhan University, Wuhan 430072, China)
Abstract: In order to improve the insulation strength of power transmission line air⁃gaps effectively and reduce fail⁃
ure rate of flashovers caused by windage yaw in transmission lines, typical rod⁃plane electrode was adopted and
power frequency discharge tests with insulation barriers were carried out. A method of installing insulation barrier
was discovered to increase the breakdown voltage, and then the parameters of insulation barriers for improving the
insulation strength of air gaps between transmission lines and towers were put forward according to the test data. Re⁃
sults show that, the method of installing insulation barrier on the surface of zero potential electrodes will hinder the
formation of discharge channel, increase the length of the air⁃gap discharge channel, and the breakdown voltage
can be increased. Installing insulation barrier on the surface of tower can increase the conductor⁃tower gap insulation
strength of UHV AC transmission line, reduce the design parameters of tower head, and it is a practical technique
for optimization design and maintenance.
Key words: power transmission line; air⁃gap; insulation strength; insulation barrier; windage yaw flashover

 

 

 
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