英国留学生英语类dissertation指导范文：电力行业规划技术设计Power sector planning technical design

Power system planning for the present system is weak links exist within the system and the professionalspects for progressionwithin the following few years , recommendimprovements and develop a blueprint . as an example: a system is just too big trfinishlines , you wish to need to think about double-circuit line. Weak connection somewhere within the system , the want to extfinishthe contact line . so as to add a load , the will for additionalsubstations . the brand newchronic plant somewhere at the want to switch the webwork structure. and so forth. System planning and design related work can also be divided into long-term progressionofchronic system planning, system progressiondesignchronic medium term. Its single electricengineering design has a guiding role , but in addition demonstrate the will for the progressionof the most vitalbasis .

Power Engineering within the planning and design of the basiccontents of the system involved
Power system planning, in line with the size progressionof the population of all of the region , economic, commercial, electricchronic load forecasting, electricchronic and attemptbalance for eachpartition , predict the way forward for the district to wwithin the los angelesck of electricality , the facility distribution performed , the well-planned grid Finally, to make estimates of the entire cost , and the commercialfeasibility of a few of the commercialsignsanalysis, demonstration planning scheme

Meet user demand .chronic systems associated withthe folk's livelihood , to satisfy some of the dep.s of the national economy and those's life growing demand for electritown, security of sourceis the most vitaltask within the chronic sector . The pace of progressionof the facility indusattempt to play a number one role in looking to circumventchronic shortages should make surenormal production of businesss .

sourcesecurity and reliskill. Improve the total quality of the electricality staff, strict implementation of the principles and regulations , and continuously improve the operational level , to preventaccidents. Once an accident occurs , you want in order to quickly and correctly treated, to preventthe expansionof the accident, do quickly restorechronic. since the facility interruption will allowagricultural production halt , people living disorder, or even endanger the security of persons and gear , to cause serious economic and security consequences . A sudden lack ofchronic to the national economy due to the shortage of a lot greater than the grid itself . So to begin with to make sure safe and reliablechronic supply.chronic system failure is the leading causechronic outages. But produce could be very trickyto preventthe accident , and a number of user requirements for security and reliskillof sourcedon't seem to be the similar. Typically , the U.S.er need to be set for a category of 2 or more independentchronic betweenchronic sourceneed to be capable of vehiclematically switch to at any time of an influence failure , in order thon these users won't interrupt the facility source: the U.S.er also needs to be set for 2 Type II independentchronic source, manual switch to satisfy the necessities , however it's going to cause short-termchronic outages ; for 3 kinds of users sometimesuse a singlechronic source, but not random blackouts.

make surepower quality . smartpower quality indicator is the frequency of the ACchronic system normal , typically(50 ± 0.1-0.5Hz), the voltage doesn't exceed the rating of ± 5% - ± 10% and waveshapeproperly. smartenergy, electricapparatuscan functionproperly and accomplish the most productive state , into the most productive economic price; If instskillor adjustmentsin scope than the allowable value, alalthoughthe availskillhas not been interrupted , but has seriously affected the popularand quantity of professionalducts, non-publicsafety or even cause apparatusmalfunction , endangering the operation of the facility system itself . need totherefore be to make sure the steadiness of the nominal frequency and voltage regulator through FM and measures . (D ) make sure the electricality to run the economy with the expansionof market demand, the size of energy production shall be greater. In its production, transportation and distribution means of the energy consumed within the national economy itself in a considerable propart of energy . Therefore, to attenuate the professionalduction of energy per lkW.h lessenenergy consumption and transportation , lack ofchronic distribution process , a overwhelming majority of laborers within the electritownsector is terribly vitaltasks. lessenenergy costs doesn't mean saving on energy. Would also lessenthe price of all of the electricality sector . all of the national economy bring wonderfulbenefits.

Access system solutions . in line with the natureistics of the unique network location of the professionalject , load distribution and grid progressionplanning , the outline of professionalject prestigeand role within the chronic system , in line with the webwork planning approval comments , in addition to manipulatement departments, compare program access system proposed project .

In his discussion of the professionalject access system coursesshould mixdistance , considering land conservation , energy saving, the appliance of latest technology grid . on the similar time , the want to boost the los angelesyout and size of the http://www.ukthesis.org/yylw/ professionalject of this systems , put into operation and the general grid structure, operation mode and offervoltage , etc. close toarea.

electriccalculations. electricpower system calculation is the basiccontent planning and design , including: flow calculation , stskillcalculation , short circuit calculation and reactivechronic repaymentcalculations.

Flow calculation mainly for electritowndistribution network within the chronic and voltage is calculated by flow calculatidirectly to figure out the best way the system is administeredning , check whether the components meet operational requirements, and sourcesystem protection and stskilland sourcethe root for the initial calculation . Second, the steadiness calculation is defined in line with the necessities of variouspower system fault conditions are simulated and analyzed to figure out the primarychronic system stskillcharacteristics and stable level. Third, the basiccircuit curhirecalculations in a given grid checking , the abnormal short circuit curhireas a result of a fault generated within the electric element . a number of short-circuit curhirecalculation project node access system , and will give the root for choice equipment. Fourth, the right reactivechronic compensation, can give the right reactivechronic to the electricality network within the perceptual load , thereby reducing the transmission of variousnetwork elements because reactivechronic causedchronic loss. particularlychronic project, to be according to a balance of reactivechronic , reactivechronic repaymentdevice proposed total capatownand group capacity, voltage fluctuations want to be checked when a single set of low-voltage capacitor switching when necessary reactivechronic balance researchclose toarea, and songphase voltage regulator topics calculations.

Comparison Program. Access to the professionalject plan to match the resultscalculated at the root of the above in a number , safety and reliskillof the researchfrom the implementation of resistance, adaptskilland economic progression, etc., so as to make the assessmentof the design and operation of this systems , and selectthe most productive one because the recommended solution.

a fewexperience inchronic system planning and design work
Preparation stage. Before launch system planning and design work need to be collected close toarean influence system established order relevant informatidirectly to know the fundamental situation and characteristics of a giant network zones, analyze and organize the collected system data. selection of existing substations,chronic lines and datatransfer system , and an inventory of encheck outinto the informationbase tables , bureaucracythe root of the datagrid grid established order .

on the similar time , the want to gather the most recent main electritownnetwork planning report , to know the developmentand alters of direction close tozone gridchronic network planning datashall be entered into the informationbase , forming the root of the datagrid once a year planning horizon .

To work . Concerned concerning the most recent adjustmentswithin the chronic system , update the informationbase data suite and research load conditions and characteristics of eachregion, to procure all plants within a big network, substation, the geographic distribution ofchronic and datalines for the system design ready.
For a brand new project , expand the gathering to the local load conditions , to update the local and surroundingchronic system data. After that, for varioussystem electriccalculations, with the professionalject 's design work .

Electritownnetwork infrastructure knowledgeis very vitalforchronic system planning and design, all electricgrid computing are according to the root of the data. Therefore, to continuously update and that improve the fundamental knowledge, it is going to be an extended-termchronic system planning and design.

Epilogue

With the facility system to a big unit , largechronic , topvoltage, and the developmentof long-distancechronic transmission ,chronic system planning and design of the role played by an additional increase within the personexpresspower engineering design, system design prorequirements also are increasing. on this paper, the design of the systems interested inchronic engineering to design content are discussed and discussed and summarized a part of relevant work experience for reference .