《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
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
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· Abstracts ·
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
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
 ...

  2015.10

2015.10
  日期:2015-10-23     【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:
 

Mathematical analysis on SPWM and SAPWM
based on sawtooth carrier wave
CHEN Guo⁃cheng1, 2, CAI Li⁃qing, ZHOU Qin⁃li, GU Hong⁃bing, LEI Dian1, 2
(1. Giant Industrial Technology Co. Ltd. , Changzhou 200122, China;
2. Department of Automation, Shanghai University, Shanghai 200072, China)
Abstract: Power electronic conversions are mostly using the PWM method to transfer electrical power, and the car⁃
rier wave is usually an isosceles triangle type. With the use of isosceles triangle wave as the carrier wave, soft
switching PWM mode is hard to be applied, especially for three⁃phase power converter, because the three⁃phase in⁃
verter switching devices often need to synchronize the on or off states, and an alternative method is the use of a saw⁃
tooth wave as the carrier wave. However, after replacing the isosceles triangle carrier wave with sawtooth carrier
wave, how the PWM spectrum changes and what the impacts will be? This paper has made an in⁃depth analysis on
these issues. The study concluded that the frequency spectrums of the isosceles triangle and the sawtooth carrier
PWM mode are quite different, while the latter has wider sideband and more harmonics, so effective measures must
be taken to filter out the harmonics.
Key words: triangle wave; sawtooth wave; PWM; frequency spectrum; sideband

Stackelberg game model for active defending strategy in
hybrid AC / DC power system
ZHANG Zhen⁃an, HUANG Shao⁃wei, LIANG Yi⁃le, ZHAO Yang
(1. Henan Province Electric Power Research Institute, SGCC, Zhengzhou 410100, China;
2. State Key Lab of Control and Simulation of Power Systems and Generation Equipment,
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)
Abstract: With the hybrid AC/ DC power system gradually coming into being, the security of the system is increas⁃
ingly important. It is essential to identify the vulnerable components and to make defending strategies to prevent
cascading failures. This paper proposes a Stackelberg game model for active defending strategy in AC/ DC power
system, i. e. D⁃A⁃D tri⁃level programming model. The upper⁃level model determines the active defending strategy,
the middle decides the multiple contingencies, and the lower represents the security dispatch process. This model
can be transformed into a bi⁃level model whose lower⁃level is a mixed integer linear programming problem. Thus it
can be solved by an enumeration tree algorithm. Simulations and analysis have been conducted in an IEEE 30 bus
system to prove its rationality and validity.
Key words: power system; active defense; Stackelberg game; tri⁃level model

Codimension two bifurcation studies of power system containing SVC
CHI Kun, GAO Feng⁃yang, DONG Wei⁃guang, CAO Xiao⁃bin
(1. School of Automations and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)
Abstract: As the effects of revealing system parameters on the voltage stability of power system, it is necessary to
overcome the limitation of the single parameter bifurcation. Using bifurcation analysis method of the active, reactive
power and SVC parameters, that the complex power system solutions of two⁃dimensional manifolds have Generalized
Hopf bifurcation and Zero⁃Hopf bifurcation phenomenon can be verified. The analysis result shows that the Zero⁃
Hopf bifurcation point is the intersection of the SNB and Hopf curves, and increasing the KSVC is helpful to expand
two⁃dimensional bifurcation boundary. The same KSVC value can adjust the reactive power to eliminate the Zero⁃Hopf
bifurcation point. There parameters can reveal bifurcation mechanism in power system.
Key words: voltage stability of power system; codimension two bifurcation; SVC; bifurcation theory

Wind farm models suitable for mid⁃term and long⁃term simulation
SUN Xiao⁃yan, ZHU Yong⁃qiang, ZHU Ling⁃zhi, HE Guang⁃quan
(1. School of Electrical and Electronic Engineering, North China Electric Power University,
Beijing 102206, China; 2. Renewable Energy Department, China Electric Power
Research Institute, Nanjing 210037, China)
Abstract: Direct⁃drive permanent magnet synchronous generator (PMSG) wind turbines make up a growing portion
of the wind farm because of its high efficiency and reliability. Previous modeling analysis mainly applies to the elec⁃
tromagnetic transient detail model, but it doesn’t apply to the long⁃term process, such as large⁃scale system dis⁃
turbance and the imbalance between active and reactive power caused by it. This paper takes the wind farm model
made up of PMSG wind turbines, which is suitable for mid⁃term and long⁃term simulation as the research object.
Firstly, the simplified model of the PMSG wind turbine suitable for mid⁃term and long⁃term simulation is established
in this paper. And then the corresponding model of wind farm is put forward, which has the ability to adjust the ac⁃
tive power and reactive power. Finally related simulations are carried out. The simulation results prove the correct⁃
ness of the proposed simplified model and the effectiveness of wind farm model used in mid⁃term and long⁃term sim⁃
ulation process.
Key words: mid⁃term and long⁃term simulation; PMSG wind turbine; simplified model; wind farm

Capability and effect of primary frequency regulation by wind
turbine generators with active power reserve
LI Sheng⁃hu, ZHU Guo⁃wei
(School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China)
Abstract: Variable⁃speed wind turbine generators may operate with active power reserve by overspeed and pitch an⁃
gle control, thus it is possible to participate in primary frequency regulation following droop control. Based on ac⁃
tive output increment of the wind turbines, difference between steady⁃state frequency deviations without and with
wind power frequency regulation is defined to quantify contribution of the wind turbine generators to decrease fre⁃
quency deviation. It is found that the frequency regulation capability is decided by the wind power penetration, the
captured wind power and the deloading level, while the regulation effect is decided by the frequency response of the
synchronous generators as well as the load increment of the power systems. The critical load increment fully utilizing
the active power reserve of the wind turbines is determined. The steady⁃state and the dynamic simulations verify fre⁃
quency regulation effect under different wind speeds, and show that the dynamic process under high wind speed is
quicker than those under medium or low wind speeds.
Key words: primary frequency regulation; frequency deviation; active power reserve; variable⁃speed wind turbine

Lifetime evaluation of battery energy storage system in wind⁃ES
hybrid power system
LI Jun⁃hui, FENG Shuang, CUI Xin⁃zhen, YAN Gan⁃gui, GAO Kai, LI Hong⁃bo
(1. School of Electric Engineering, Northeast Dianli University, Jilin 132012, China; 2. Changchun Electric
Power Supply Company, State Grid Jilin Electric Power Company, Changchun 130021, China;
3. State Grid Liaoning Province Electric Power Company, Shenyang 110000, China;
4. State Grid Jilin Electric Power Training Center, Changchun 130022, China)
Abstract: Using battery energy storage to build a large⁃scale wind⁃energy storage (Wind⁃ES) hybrid power system
has become the focus of current research to mitigate the fluctuation of wind power. However, battery system is run⁃
ning in complex charge⁃discharge state when used in Wind⁃ES hybrid power system scenario. In order to optimize
battery operation mode and elongate its lifetime, to evaluate its lifetime is important. In this paper, lithium battery
energy storage is used as the study object, its lifetime characteristics under experimental conditions are analyzed.
Considering the impact of the charge⁃discharge depth and number of irregular charge⁃discharge cycles, a lifetime e⁃
valuation method is developed under Wind⁃ES conditions. Based on the wind power data, the lifetime evaluation
method is used to analyze battery characteristics under the designed operation control strategy for Wind⁃ES. The re⁃
sult provides theoretical reference for configuration of the battery energy storage in engineering application.
Key words: wind⁃ES hybrid power system; battery lifetime; charge⁃discharge cycle depth; control strategy

Research on AC ice⁃melting method for OPGW
HUANG Pei⁃wei1,2, WANG Yin⁃shun1,2, GUO Huan⁃hui1,2, LI Yang1,2, JU Peng1,2
MIAO Jin⁃ya1,2, LIU Chang⁃jun1,2
(1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,
North China Electric Power University, Beijing 102206, China;
2. Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility,
North China Electric Power University, Beijing 102206, China)
Abstract: Ice depositing on transmission lines is of great danger to the security and stability of electrical power sys⁃
tem. Especially the ice accidents of the electric power communication ground wires may cause power outage and
communication interruption. So, to improve the melting technology of ground wire is of great significance. A new
AC ice⁃melting method for Optical Fiber Composite Overhead Ground Wire (OPGW) is proposed, which has ad⁃
vantages of low induced voltage, small reactive power and low cost supply power as well as convenient operation. It
is applied to partial line ice⁃melting, which can ensure the voltage and heat requirements and reduce the energy
consumption. The new structure of the new OPGW chose a twisted bifilar wire fabricated by enameled wire as a
heater for de⁃icing by replacing the aluminum⁃clad steel wire in the central layer. After a sample was fabricated,
temperature rise of bare conductor and de⁃icing tests with ice depositing on its surface were performed respectively.
On the other hand, an equivalent thermal circuit was established according to the simplified thermal resistance mod⁃
el by which the temperature rise of conductor was separately calculated and simulated by Matlab software. The sim⁃
ulated results are in good agreement with the experimental ones, which preliminarily validates the feasibility of the
new structure for de⁃icing.
Key words: Optical Fiber Composite Overhead Ground Wire (OPGW); AC de⁃icing; twisted bifilar wire; thermal
circuit method

Electromagnetic design of bearingless switched reluctance
motors considering coupled characteristics of magnetic field
LIU Ze⁃yuan, YANG Yan
(Nanjing University of Posts and Telecommunications, Nanjing 210023, China)
Abstract: Combining the derivation of mathematical model of BSRM and its operating characteristics, the computa⁃
tional formula of main dimension for 12/8 BSRM is proposed combining the relationship between electromagnetic
torque and output power, and it can consider the coupled magnetic⁃field characteristics of torque winding and radial
force winding. Moreover, considering the radial force characteristics of BSRM, the average radial force is used for
the design of the radial load. Based on the worst operation condition of BSRM, its number of turns is calculated u⁃
sing the winding peak current. Moreover, the principle of selecting pole arcs of stator and rotor teeth for BSRM is
analyzed. Finally, a prototype is designed using this method.
Key words: bearingless switched reluctance motor; motor design; torque; radial force

Analysis of temporospatial complementarities of wind energy
resources in China and their impacts on power system
LIU Yi1,2, XIAO Li⁃ye1,2
(1. Key Laboratory of Applied Superconductivity, Chinese Academy of Sciences, Beijing 100190, China;
2. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China)
Abstract: Since wind speed is highly intermittent and fluctuant, the electrical output from wind farms is stochastic.
Therefore, integration of large⁃scale wind power may bring negative impacts on power system stability, control and
operation. Besides using energy storage system and building hybrid thermal⁃wind system, there exists another feasi⁃
ble way, namely, using the complementarities of geographically dispersed wind generations to smooth wind power
fluctuations. The paper overviews the studies on the complementarities of dispersed wind resources and analyzes
their potential impacts on power system stability, design, control and operation. Furthermore, based on the wind
power development and the existing power grid in China, this paper analyzes the potential to make use of the com⁃
plementarities of geographically dispersed wind generations. Finally, a map of making use of the complementarities
of wind resources in China is presented.
Key words: wind power; fluctuations; smoothing effect; temporospatial complementarities; future power grid; DC
transmission; intermittent

Household electricity energy efficiency assessment in
smart power utilization environment
QU Zhao⁃yang, WANG Chong, PAN Feng
(1. School of Information Science and Engineering, Northeast Dianli University, Jilin 132012, China;
(2. Information & Telecommunication Branch Company, State Grid East Inner
Mongolia Electric Power Co. Ltd. , Hohhot 010020, China)
Abstract: In view of the home energy efficiency assessment accuracy being not high, the method of household elec⁃
tricity energy efficiency assessment under smart electricity environment is proposed. According to different family
influence factors, the method for power index system of evaluation index uses AHP and Bayesian method to estab⁃
lish family power index system for evaluation model of energy efficiency, and finally establish the overall household
power evaluation model to evaluate household electricity energy efficiency. The example shows that the method can
accurately detect and assess the family situation of energy consumption, and can improve the residential electricity
efficiency as well.
Key words: household electricity energy efficiency evaluation; energy efficiency assessment; AHP; Bayesian
method; energy efficiency evaluation model

Method for determining optimal break point set considering relay
protection importance in multi⁃loop power network
ZHANG Xiao⁃hui, CHANG Yan⁃ke, LU Zhi⁃gang
(1. Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province,
Yanshan University, Qinhuangdao 066004, China; 2. State Grid Gaocheng Power Supply Company,
Shijiazhuang 052160, China)
Abstract: Determining minimum break point set is one of the key steps of setting and calculating of relay in a
multi⁃loop network. A method for determining the optimal break point set is proposed. To assess the difference of
minimum break point set, the concept of relay importance is introduced. The objective function can be built based
on the improved quantum⁃inspired binary particle swarm optimization algorithm for the optimal break point set.
Thus the method takes the risk and backup dependency of relay and the importance of node in system into account,
and makes a comprehensive assessment of the importance of the break point set. At the same time based on strong
searching ability characteristics of the improved quantum⁃inspired binary particle swarm optimization algorithm, the
minimum base of break point set and the lowest importance of the result can be ensured. The effectiveness of the
proposed method is validated with simulation analysis.
Key words: MBPS; QBPSO; relay protection importance; utility function

Analysis of effect of interleaving techniques on winding loss of
high⁃frequency tranformer based on ANSYS simulation
ZHANG Ning, LI Lin
(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,
North China Electric Power University, Beijing 102206, China)
Abstract: In order to explore the effect of interleaving technique of winding on winding loss of high frequency trans⁃
former, based on the high frequency transformer prototype model, the finite element software of ANSYS is used to
establish the simulation model of high frequency transformer, and the uninterleaving winding is taken in constrast
with interleaving winding in the aspects of magnetic flux intensity of the magnetic core window, current density dis⁃
tribution of winding and winding loss. In conclusion, the interleaved winding technique can reduce winding loss of
high⁃frequency transformer, at the same time the simulation by ANSYS verifies the rationality and feasibility of loss
analysis of the winding structure, and this provides effective technical support for optimum design of high⁃frequency
transformer. Key words: interleaving technique; high frequency transformer; finite element; winding loss; magnetic induction
intensity


 
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