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2005IEEE/PES

TransmissionandDistribution

Conference&Exhibition:AsiaandPacific

Dalian,China

AStrategyofReactivePowerOptimizationfor

ComprehensiveEconomyofOperatingand

AdjustinginDistributionSystems

RenjunZhou,Hongming

Yang,Yongfei

Ma,Shiping

Su

Abstract--Inordertopreventtoomanyequipmentactions

and

toofrequent,

anovelstrategyisproposed

asthetwo-stage

process,i.e.theoff-linepre-optimizationandreal-time

optimization.Eachtimeintervalswithin

adispatchperiod

are

pre-optimized

onebyoneusingconventionalmodel,whilefor

real-timeoptimization,

anewmodelispresented.Notonlyare

theminimumnetworklossbutalsothe

costofcontrolactionand

thenumbertakeninto

account,thusoptimizingtheentire

system'svoltage,networkloss,equipmentlifeandnumberof

actions

sothatthecomprehensive

economyof

systemoperationis

realized.Theinertiafactorandsensitivitycalculation

are

introduced

toadjusteffectivelytherationaldistributionofthe

actionnumberoftheequipmentsinwholedispatchperiod.Inthe

algorithm,improvementhasbeenmade

onthesearchfor

optimizationusingGeneticAlgorithm.Theexampleshowsthat

thismethodiseffectiveandpracticaland

canbeused

toonline

optimizationandoperation.

IndexTerms--reactivepoweroptimization;inertiafactor;

sensitivity;

twostages;on-linecontrol

strategy

I.INTRODUCTION

IN

practicereactive

poweroptimizationofdistribution

systems,whileminimizingtheobjectiveofnetworkloss

andsatisfyingvarioussecurityconstraints,

asituation

can

occurwherethere

aretoomanyactionnumberforregulations

oftransformer

tapsandswitchesofcompensationcapacitors

inatime-interval,

ortoofrequentactiontimesforeach

equipmentintheentirecycleofdispatch,whichaffectsthe

usablelifeofequipmentandthesafetyofthesubsequent[1].

Iftheactiontimes

arerestrictedsimplyinthestatic

state

calculation,theequipmentswithgoodoptimizingeffect

may

prematurelyreachtherestrictedvalueoftheactiontimesin

thefirst

fewtimeintervalsintheoptimizeddispatchingcycle,

Thiswork

wassupportedbyNationalNaturalScienceFoundationof

China(60474070)

1

R.ZhouiswiththeCollegeofElectricalEngineering,Changsha

UniversityofScienceandTechnology,Changsha,

Hunan,410076,P.R.China

(e-mail:zrJ073

Inahotmailcom).

H.YangiswiththeCollegeofElectricalEngineering,Changsha

UniversityofScienceandTechnology,Changsha,

Hunan,410076,P.R.China

(e-mail:yhm52I8,a263.net).

Y.MaiswiththeCollegeofElectricalEngineering,ChangshaUniversity

ofScienceandTechnology,Changsha,

Hunan,410076,P.R.China(e-mail:

maywavesna6cr)

S.ShuiswiththeCollegeofElectricalEngineering,ChangshaUniversity

ofScienceandTechnology,Changsha,

Hunan,410076,P.R.China(e-mail:

hjj22@hotmail.com)

0-7803-9114-4/05/$20.00©2005IEEE.1resultingintheirstopofactioninlatertimeintervalsandeven

deterioratingoptimizationeffect.

Inthecurrentreferencesonthetimesandnumberof

regulationandcontrolaction,theDynamicProgramming

Approach[2]canhardlybeusedinaactuallarge-scale

distributionsystemowing

totheproblemofdimension

catastrophe;theTime-IntervalBasedApproach[3],which

reducesthenumberoftimeintervalsinthedispatchingcycle

byanalyzingthepredictedload

curveandisoptimizedoff-

line[4],isnotofthesuperiority,duetomoretimeinterval

divisionsneededforthedifferentloadchange

ateachnodes;

theDynamicReactive-PowerOptimizationAlgorithm[5],

carried

outdynamicallyfor

24hoursin

awholedayby

consideringtheconstraintofactiontimesforcontroldevices

usingthenonlinearoriginaldualinteriorpointsalgorithm,is

ofgreateroverallsignificancethanthestaticoptimization.

But

withthelarger

systemorthesmallerlimitvalueofaction

timesitis

moredifficultforcalculationand

convergence.

Soanovel

strategyisproposedforthecomprehensive

economyofoperatingandadjustingforreactive

power

optimalcontrolinthedistributionnetwork.Althoughthe

networklossisnotminimized,theequipmentdurablelifeand

systemstabilityhavebeenimproved,whichis

evenmore

economicalthan

amereminimumnetworkloss.The

comprehensiveeconomicbenefitsobtainedconsistinthe

decreaseofthenetworkloss,theequipmentaction

costand

thedisturbancesinoperation.

II.THE

MATHEMATICALMODELSOFTHETWO-STAGE

REACTIVEPOWEROPTIMIZATION

Thetwo-stageprocessingmethodisproposedfortheentire

reactivevoltagecomprehensivecontrolsystem.

A.Theconventionalmathematicalmodelfor

Pre-optimization

Thevolt-reactivepoweroptimizationrefers

tothe

determinationofthe

outputvoltageof

generator,the

tapofthe

on-loadvoltageregulatingtransformerandtheinputofthe

reactivecompensationequipment

onconditionthatall

constraints

aresatisfied

soastoachieveminimumactive

networklossofthe

systemandtheoptimizationofthevoltage

atallthenodes.Themathematicalmodelforconventional

reactivevoltagecomprehensivecontrolis

asfollows:

1)Theobjectivefunction

min

F=PLoss(QIXT)(1)

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智能交通系统中英文对照外文翻译文献

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(文档含英文原文和中文翻译)

智能交通系统中英文对照外文翻译文献

原文:

Traffic Assignment Forecast Model Research in ITS

Introduction

The intelligent transportation system (ITS) develops rapidly along with the city

sustainable development, the digital city construction and the development of

transportation. One of the main functions of the ITS is to improve transportation

environment and alleviate the transportation jam, the most effective method to gain

the aim is to forecast the traffic volume of the local network and the important

nodes exactly with GIS function of path analysis and correlation mathematic methods,

and this will lead a better planning of the traffic network. Traffic assignment forecast

is an important phase of traffic volume forecast. It will assign the forecasted traffic to

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(含：英文原文及中文译文)

英文原文

Frontiers of Social Psychology Arie W. Kruglanski 、 Joseph P. Forgas

Frontiers of Social Psychology is a new series of domain-specific

handbooks. The purpose of each volume is to provide readers with a cutting-edge overview of the most recent theoretical, methodological, and

practical developments in a substantive area of social psychology, in greater depth than is possible in general social psychology handbooks.

The editors and contributors are all internationally renowned scholars

whose work is at the cutting-edge of research. Scholarly, yet accessible, the volumes in the Frontiers series are an

essential resource for senior undergraduates, postgraduates, researchers, and practitioners, and are suitable as texts in advanced courses in specific

subareas of social psychology.

7毕设外文翻译(原文)

7毕设外文翻译(原文)

桂林电子科技大学信息科技学院

毕业设计(论文)外文翻译

（原文）

系 （部）： 管理系

专 业： 财务管理

学生姓名：

学 号： 1054400413

指导教师单位： 桂林电子科技大学商学院

姓 名： 刘承焕

职 称： 副教授

2014 年 5 月 26 日

1

FINANCIAL DIAGNOSIS OF A COMPANY’S ACTIVITIES

SUCIU GHEORGHE

Associate professor, “Dimitrie Cantemir” Christian University Braşov, Romania,

ucdc.suciu.g@

BÂRSAN PIPU-NICOLAE

Associate professor “Dimitrie Cantemir” Christian University Braşov, Romania,

nbarsan@

Rezumat: Financial diagnosis consists of a number of instruments and methods which

help to evaluate a company’s financial situation and performances. The financial diagnosis

identifies the favourable and unfavourable factors which will affect the company’s future

activity. The purpose of financial diagnosis is to draw a comparison with similar companies,

公司的核心竞争力外文翻译及原文

公司的核心竞争力外文翻译及原文

The Core Competence of the Corporation

C.K. Prahalad and Gary Hamel

The most powerful way to prevail in global competition is still invisible to many

companies. During the 1980s, top executives were judged on their ability to

restructure, declutter, and delayer their corporations. In the 1990s, they'll be judged on

their ability to identify, cultivate, and exploit the core competencies that make growth

possible indeed, they'll have to rethink the concept of the corporation itself.

Consider the last ten years of GTE and NEC. In the early 1980s, GTE was well

positioned to become a major player in the evolving information technology industry.

It was active in telecommunications. Its operations spanned a variety of businesses

including telephones, switching and transmission systems, digital PABX,

semiconductors, packet switching, satellites, defense systems, and lighting products.