最新成都理工大学电力系统分析

1、精品文档本科生实验报告实验课程电力系统分析学院名称核技术与自动化工程学院专业名称电气工程及其自动化学生姓名学生学号指导教师顾民实验地点6C901实验成绩精品文档电力系统分析实验报告摘要电力系统分析是电气工程专业的主干基础课程， 是学生进入电力系统专业的 主要向导和桥梁。而MATLA仿真中的Simulink建模是对电力系统进行建模分析 的一个重要工具。关键词：电力系统；MATALB建模实验一电力系统分析计算、实验目的1. 掌握用Matlab软件编程计算电力系统元件参数的方法.2. 通过对不同长度的电力线路的三种模型进行建模比较，学会选取根据电路要 求选取模型。3. 掌握多级电力网络的等值电路计算

2、方法。4. 理解有名制和标幺制。二、实验内容1. 电力线路建模有一回220kV架空电力线路，导线型号为LGJ-120,导线计算外径为15.2mm 三相导线水平排列，两相邻导线之间的距离为4m试计算该电力线路的参数，假设该线路长度分别为60km 200km 500km,作出三种等值电路模型，并列表 给出计算值。电阻（欧）电抗（欧）电纳（S）电阻（欧）电抗（欧）电纳（S）电阻（欧）电抗（欧）电纳（S）60 km200km500km模型115.75欧22.8欧1.8e-4欧52.5欧76欧6e-4欧131.25欧190欧1.5e-3欧2. 多级电力网络的等值电路计算部分多级电力网络结线图如图1-1所

3、示，变压器均为主分接头，作出它的等 值电路模型，并列表给出用有名制表示的各参数值和用标幺制表示的各参数值。L1r ( j )>220kVHCkViokvT1T2图1-1多级电力网络结线图线路额定电压电阻（欧 /km）电抗（欧/km）电纳(S/km)线路长度（km）L1 （架空线）220kv0.080.4062.81*10 -6200L2（架空线）110kV0.1050.3832.81*10 -660L3（架空线）10kV0.170.38忽略15变压器额定容量Pk(kw)U%Io%Po(kW)T1180MVA893130.5175T263MVA28010.50.61602. 作出等值电路仿

4、真模型，线路采用中等长度模型，用字母标出相应的参数以220KV为基本级，SB=100MV按精确求解要求，求出有名制和标幺制表示 的各参数值。（注意有些量要归算）。按下表填入计算数据。用下标标示相应的 线路和变压器。参数名称Z1Y1Z2Y2Z3有名制16+j81.2 ?j5.62e-4S25.2+j91.2?j0.4215e-4S1234.2+j2758.8?标幺制0.033+j0.1677j2.72e-10.052+j0.1882.04e-22.55+j5.7参数名称ZT1YT1ZT2YT2有名制1.3+j34.95?3.6e-6+j1.8e-5S3.4+j80.66?1.2e-6+j7.9e

5、-6S标幺制2.6e-3+j0.0721.742e-3+j8.712e-37.024e-3+j0.16675.808e-4+j3.823e-33、回答思考题二、思考题1 比较计算数据，讨论模型的适用条件。答：一，对于长度不超过100KM的架空电力线路，线路额定电压为60KV以下 者；以及不长的电缆电力线路，电纳的影响不大时，可认为是短电力线路。只能应用短电力线路模型。二，线路电压为 110到220KV架空电力线路长 为100-300km,电缆电力线路长度不超过100km的电力线路，可以认为中等 长度的电力线路。三，一般长度超过300km的架空电力线路和长度超过100km 的电缆电力线路称为长线

6、路，对于这种电力线路，需要考虑他们的分布参数 特性。2 什么是有名制？什么是标幺制？电力系统元件的有名值和标幺值有什么关系？有名制：采用有单位的阻抗，导纳，电压，电流，功率等进行计算的标幺制： 采用没有单位的阻抗，导纳，电压，电流，功率等的相对值来进行计算的 标幺值=有名值/相应的基准值。实验二电力系统简单电网潮流计算一、实验目的1. 学习Matlab仿真方法。2. 初步掌握电力系统时域分析工具。3. 电力系统简单电网潮流计算仿真分析。二、实验内容在如图2-1所示的电力系统中，已知条件如下：变压器 T： SFT-40000/110，Ps -200kW,Vs =10.5%,= 42kW,l

7、76; =0.7%, & 二 kN，线路 AC段：l =50km,r1 =0.27门你口必=0.42/km ；线路 BC段：l =50km,* =0.45'J/km,为=0.41'/km ；线路AB段：l =40km,r!丸刀门/出"=0.42, Tkm ；各段线路的导纳均可略去不计；负荷功率：Sldb =(25 j18)MV A Sldd =(30 * j20)MV A ；母线 D 的额定电压为10kV。节点A为平衡节点，其余为PQ节点。计算系统的潮流分布。图2-1简单电力系统三、实验原理及步骤参考教材MATLAB/Simulink电力系统建模与仿真第四章四

8、、实验设备1. PC 一台2. Matlab 软件五、实验过程图2-2负载1参数Block Parameters: I hree-Phase Dynamic Load厂 Three-Fhase Dynamiu Lead sask) (link)esent = h three-phaESj, three-*ire dynead匚 load. Active pc»'er F and rea;t£ve poiF&r 二 at Earbed k：T the 1c vblt：p function Df posit ive-e QiLenc & vol tars

9、 f zordLEf tc fequations：:If VniiL, F uid Q vir：T " follovs:P*-Po*(¥/Vo) np*(l-7pL 5)/ (1+Tp2. >>Q-Q*(V/Vg) 'nQ*(l*Tiil. 5)/ (1+TqN s)if v<vminSa.= Tiu且tion匸 iith np-ai-2 (f：Dait&nt inp?d&n:&Check r External ccntrcl cf FQr tc control pcer fre-a a vectcrized Siaulin

10、k siinal P Q-Ncninal L-L voltare and fr&in&ncz Vn Xrz.s. fr (Hz.|. 115g3 50 :Active reactive newer at initial valt=r= Fo T '.var :Iniiial r>Dsitivs-!eQ'tiencvcltafj Vo "Mar 口ll： Fhmgg (iej.:1 iAO'C n Aijftj D"Q.I _ X _ 丄 LT恵.£L/- v X u ' 1 却Ie £ 丁 pm 貝c

11、on tTOI Time con«tsntE 'Tpl Ip2 7t)l Jq2' /：:I a uifinira vltsse Viin 'mi：-:Apply图2-3负载2参数只 Block Parameters: Three-Phase Parallel RLC Br.?_ Three-Phase Far al 1©1 RLC Branch -'aask> (link/ This block implanents & th-ree-pha=e parallel RLC bTHmcli,-Far&aGtersReii

12、Etaiice R JOhas :Induct slice L :H?:Cfipacitancg C :F.:|le-J£ea5ur=z:&nt51OKCane elHelpApply |图2-4线路参数> Block Parameters: Three-Phase Parallel RLC Br.7hree-Fha=eELC E*ajich ：r)a=k：:二ink；This bLock inpLsnents r thrse-chajt EirallStLC tr&nch.Resistance R ：0hxi5：:图2-5线路1参数图2-6线路2参数号 Blo

13、ck Parameters: Synchronous Machine pu Stands.Synchronous Machine zmk（1 inJt：二二EntE a S-phae ynzhroriDU* achin? nodslld in the Jq rotcr rf=rnc= f5 tat orndinrscanntcted in f tn an internilneutral nt.图2-7同步发电机参数Fh- EdhShiiiaiia Famul IccIk H«lp图2-8仿真系统 !Pov/erguii Steady-State Voltages and Curren

14、ts Tool, model: SY2MEASUREMENTS.rr A Three-Phase W Measurements1 0 00 A0.00a2:1 B: Three-Phase V-l Measurements'=0 00 A0 00fl3:'1 C: Three-Phase V-l Measurements* M0 00 A0.00n4:1 A: Three-Phase V-l Pleasure merit 7'=0 74 A128 15n5:1 日 Thre-Phase SI Measurement?'=0 74 A8 16°6:rl

15、C Three-Phase VMeasurement?11 0 74 Adii.e&aT.1 A: Three-Phase V-l Measurements1 =0 74 A-51.8Sn8：1 0' Three-Phase V-l MeasurementG11 =0 74 A-171.85a9:tC: Three-Phase V-l Measurements1 =0 74 AB8 15fl10:1 A. Three-Phase V-l Measurements* 亠0 74 A-51.85°11:'1 B' Three-Phase VMessurem

16、entS0 74 A-171.85°12:1 C Three-Phase V-l Measurements"=0 74 A68 15*13:"1 A Three-Phase VMeasurement4-0 74 A128.15*14:1 B Three-Phase VMeasurementsT 一G.74 A8.15n151 C' Three-Phase AI Medsur&mert40 74 A111 85"16:1 A Three-Phase V-l Measurements=2.30 A135 02a17:'J B: Thr

17、ee-Phase VMeasurements'2.30 A15.02°18:1 C Three-PhaseMeasurements"=2.30 A-104.98=19:1A: Three-Phase V-l Measurement2* =1.57 A41 76'20:'1 B: Three-Phase VMeasurement?二1.57 A-16176&21'1 C: Three-Phase VMeasurement?"二1.57 A7S.24"221 A Three-Phase V-l Messurementl

18、1 57 A136.24"23:1 0 Three-Phase VMEESurgmEn忖1 57 A1B24B24'1 C: Three-Phase VMeasurementl1.57 A-101.7&c25"1 A Three-Phase Measurement=2 30 A44 58n'r 1 口 Tlfti?-A AA 1. .«. / 1 ft A A. A A i i iHA rtA: A.iiA4t "SA A4CJ tioaSteady state values:Update Steady Stale ValuerU

19、nits:Peak valuesVFrequ&ncy50-Dtsplfl/:匡 i States|"7 MeasuremenisSources"| Ngmlinear element2590571 12Ordering:Mime then valuerFormat:Close图2-9仿真电流结果P'ov/ergu. Initiai States Sett.ng Iool. modek SY2kiitial electrical state < alues for simulation:Set s&tected electrical state&

20、#39;phase_A' Three-Phase Parall&t RLC Branch'A'phase_B: Three-Phase Parailet RLC Branch-0.5317 A' phase_C. Three-Phase Parallel RLC Branch=0.2707 A'phase_A Three-Phase Parallel RLC Bran ch 1=-03994A'phase_6' Three-Phase Parallef RLC Bran ch 1=03077A' phase_C: Thre

21、e-Phase Parallel RLC Branchi-0.09172A'phase_A. Three-Phase Parallel RLC Branch2二C.5251 A' phase_B Three-Phase Parallel RLC Branch2=-03119A'phase_C： Three-Phase Parallel RLC Branch?=-02132Af transfo_T_Lrri. Three-Phase Transformer (Two Windings) =-1.63 AI' transfo_2_Lm. Three-Phase Tr

22、ansformer (Two Windings) =0.8144 AF ticn；sfio_3_Lm ThrePhase Transtcrmer fTwo Wiridings) =0 81&4 A4 8104Force mitia! electrical 规 at 潴To Steady State To ZeroReload stales.From File.Frorrt diagramFormat:1112.3 (best of)Sort values by:Shte AumtiftrSave Inibal States.图2-10仿真电流结果六、思考题1、为什么会有线损？线损的构成

23、主要有哪些成分？答：线路有阻抗、导纳。电阻、电导会消耗有功，电抗、电纳会消耗无功实验三、复杂电力系统的潮流计算一、实验目的1. 学习Matlab仿真方法。2. 掌握电力系统时域分析工具。3. 电力系统复杂电网潮流计算仿真分析、实验内容如图3-1所示的电力系统中，变压器两侧电压等级分别为10kV和110kV,各元件参数标幺值示于图中。(Sb=100MVA VB=Vav)，计算系统的潮流分布。图3-1复杂电力系统网络图三、实验原理及步骤参考教材MATLAB/Simulink电力系统建模与仿真第四章四、实验设备1. PC 一台2. Matlab 软件五、实验报告要求1、Simulink仿真模型如下。

24、2、说明建模步骤和仿真过程-J'4 Block Parameters： L3X_ Three-Phase Series RLC Branch mask (lirk)-Implemerits a three-phje series RLC blanch.Use the Bnanch type' parameter to add or remove elements horn the branch.13.225Inductance L (H):0.1474Mea$urementi NonevOKCancelHelpppiy Block Parameters! L2XThree Ph

25、ase PI Section Line mask (fnk)T his block irnplements a threc phase Pl section line h represent a three pha$e transmi$ion line. T hiu block repreent orJv we Pl section. T implements more that one PI ?ectioix you simply need to connect copies U this block in series.PaiametersFrequency used For R L C

26、specification (Hz):Positive and isro-sequence resistances (Ohms/kim) R1 RO : 5.29 TenPositive- and zero-sequence inductances Li LO : 0110524 4/1264詁Positive- and zero-sequence capadtance (F/km) C1 CO 1.2e-5 7.751 e*9)Line section length (km):KCanedHelp4 Block Parameters: LIXThree-Pha$e PI Section Un

27、e (mask) (inkT his block implements a three'phase PI section line to represent a three'phase tranmision line. This block represents only one PI section. T implEfnents more thart one PI section, you simply need h connect copies of this block in seriej.ParametersFrequency used lor R L C specif

28、ication (Hz):I国丨Positive- and zero-sequence iesislances (Ohms/km) R1 RO 110.586 1.61)Positive- and zera-iequence inductances (H/km) LI LO :a.1263 4 1264e-6Positive - and zero-sequence capacitances (F/km) C1 CO :12b5 7 751e-10)Line section length km:1QKCancel旦创 pMyW Block Parameters: Load3X-T hree-la

29、se Oynamic Load emM fink7a> lhF«-phw5.时“刘忙 djEmiG I cod Act 理 u power P mrri iwcirv?' pdwei Q dxiaibed by lhe had vaij at hj世lie M paWiv*址qx补鼻 耳占I占其 V accxirdhg to fdloing equ Elions|V>Vmn. P and Q vfliy « fdkjws:PFA/0)p1UTp1 SJ41*Tp2sQ=Q 叽nqpkTq1.叩n+Tq2 屈=ilV<Vmh_Sane eoyaikm

30、?前 h np-nq-? (conan I： mp edance kudjCheck E卅etnal Donlral of PQ' Io conlrol(x»ei ham a veclaiized Simulri: sifl甸 |PQJ.PsarametersNdminal L-L dH frequeric r/hims)ln(Hi)T15R 50Active _ieaclive power al irilial vdtage FoW OofyaiU I1.Be *003 Bb*D07|Initial pKesequenw vofcage Vo |Mag(pu) Phase

31、Ideilt110 671226-4.72821 ExlAfrUil CQridQi PQFwameleis np nq t10 01Tmnc convlait； Ipl Tp2 Tql Tq2J (tjt0 屯 DMidmum vdlae Vmri pu£fircdHdp£pi4fW Block Parameters: Load2X Three-Phase Dynamic Loed (mask) (link)7 Implements a three-phase, three-wire dynamic load. Active power P and reactive po

32、wer Q absorbed bv the- load vary as function of positifve-sequenc# voltage V- according to following equations:If VVmin, P and Q vary folosiMW/Vornp-n +Tp1.s41 +Tp2s)QQ 敲V站余I +Tq1 s/(1+Tq2s)V<Vmin_Same equations with rp=nq=2 (constant impedance lewd)Check 'External contiol of PQ' to contr

33、ol power foom a veclcrized SimiJink signal P Q.PaametersNominal L-L voltage and frequency VnlVrms) fn(Hz)：Active.reactive power 皿 initial voltage Po(W Uo(varjJ 3.7e*0081.3&+008Initial positivcsequence voltage Vo Mgpu Phase (deg.); 1.O3B75 -4.22806 External control of PQPafameters I np nq)0 0Time

34、 confrtante (Tp1 Tp2 Tql Tq2陰t0 0 0 0Mirirnum voltage Vmin (pu):117OKCancelHelpAppl<吕 Clark Parameters: LoadlXThea-Phase Dynmrmc Load (mask (hnk)Implements a three-jphsse, thaawia dnamc- bad Aclive power P and reactive paei Q absoibed 曲 ihe hdd vary 辭 funcijon of po$iii¥e-$equence s-ohgeV ac

35、cording to losing eiqualions:II V>Vnnn. P and Q vary 朋 lalows:P=p1Cl-f/0pnp114-Tp1. $讥14-Tp2.*|Q -QoV A/ortnq'T*T ql .s/(1 *T q2.s)NV<VlWSarne equaHionE wth np-nq-2 (constanl rnpedarce bad)Chud; trfeir*al canlrol of PO' Vc conhol power horn vectoiiscd Simulrik signal P Q.PameteisNomhai

36、 L-!L vokagei and frequency |VnVrfTK fn(H2):115e3 5OActive _r&active power at nhal vallage (Pc(W) 0琥丫剖|: 25+0081et008Initial poEiivcsequBncc vdfcageVo Maglpu Phiase deg.|:|1 0785217.2117I I Esdemal cqhItciI al FQiParametcsis | rp nqtP QTime consiaru® Tp1 TpZ Tq1 Ta2 ls) D 0 0Minmum VDtageVm

37、in (puj:in?QK£ancd旦涉W Block Parameters： T1XThreePhase T ran$fo(mer (T wo Wirdirtgs (mask) (link)This block implements a three-phase transformer by using three singlephase tawfornne咚 Set the vjinding connection to Yn' when ou want to access the neutral poin of the WjjcClick the Apply or the

38、OK Ixibon aft田 a change la the Units popup to confirm the conversion cf parameter.Configuration Pfarmeters AdvrcedUnits puvNominal pcver and frequencjj Pn|VA), fn(Hz)I00s6,50Winding 1 parameters V1 Ph-PhVtm$) H HI pul, L1(pu10.5e3,0.0002.0Winding 2 paramder V2 Ph-Ph(VrrTis), R2puJ»L2(pu12163,0.

39、0002.0,0151Magnetization resistarKe Rm (pu)5000Mgnelization reactanc# Lm pu5000Saturation characteristic i1 ” ph«1 ;迄，phi?;. (pu)0.0; 0.0024,1.2; 1.0,1 52Initial Hukss phiOA * phiOB »phiDC (pu):0.8.4).9,07圧 | CancelHelpH Block Parameters: G2Synchronous Machine (mask) (ink)Implement a 3f

40、87;hase $ynchronou$ machine modelled in the dq rotor reference frame. Stator windings are connected in wye to an internal neutral point.Use this bk)ck it you want to specify per unit standard parameters.PacamnetejsPreset modelNoMechaniual input: Mechanical power Pm Show dtsilsd pdcam自tg當Rotor type:

41、Salient-poleNom. power, L丄 volt, and freq. PhVA) Vn(Vrms fn(Hz: 100e& 10.5e3 50Reactances Xd Xtf Xd" Xq Xq- XI (pu):1.305, a296,0 0 474, 0.243, 0.19dl axis time constants: Open-circuitq axis time constant(s): Short-circuitTime constant Tdo" T do" T q"倒: 4,49 0.0681 0.051 fSta

42、tor resistance Rs (pu):0 003Coeff. of inertia, friction factor and poke pairs Hs) F(pu p():3 70 20I nit cond dw() thdeg) ia,ibjc(pu) pha,phb,phc(deg) Vf(pu).OKC ancelHelpAppfjJ-Block Parameters: T2X T hreePhase Transfoimei (Two Windingsl (mask) (link)* This： block implements a ilhre«-ptia$e trn

43、rriwr bv 阈闻 M粧 矯闻lyphaw4一 hansformers. Set the winding connection to Yn' when you want ta access the门'neutral point oi the Wjie.Clide the Apply orlhe OK button after a cfange to the Units poqpup to coniirm the一 conversion of parameters.ConfiguraikiH Paiametei AdvancedUmitg pu工 £Nominal

44、power and frequency Pn|VAj, fn(HzllOOeBSOWinding 1 >araine<er$| VI Pti-Flif/iinsJ“ R1 (pu) ,L1l|pu)l10.5e30M2,0Winding 2 pkaramelers | V2 FtvPliM朗到-R2(pu), L2(pu)1121630.0002 XQ3Magnetization iesistance Rmi(pu)501X1 Magriebizatidn reactance Lm pu$-50M-Satuatian dhaaelerisljc il . pNl . i2. ph2

45、 . HpiJj丘匸10024.2 J QI .5打Initial fluxes | phiQA, phiQElphiOC | (pu)tlj. JO.0.Q7CancelHet3、系统的潮流分析M 'owergui Steady-State Voltages and Currents Tool, model: c4s2Steady slalt values:MEASUREMENTS；LH5:RMS values7c89£B.£9 f967.97 E89er45 71609 弱 71£OB.09 71609.5£ 71609.49 71600.0

46、9 716口57B4S.£BVrms Veins Vrnts Vrms Vrins Vrms Vrms Vrms VrmsVrws-4.S34111S.77°17.21* -m2 .79° 137.SI"17.21° -1Q3.79° 137,21fl-4.73"> MS/Va > MQ/Vb > H8/VC> M7/Va> M7/Vto> H7/Vc> M6/Va> Mfi/Vb> H6/VC> M5/VfiFrequency:-124.73MS/Vto57845

47、QEVrms115.27"57845.eaVrins-4.73*1578449理Vrins-124.73 41578454GVrms115,27fl£896B.9Vrins-4.23e£8967.97Vrms-124,23*689E0.4SVrms115.77*71cD9.49Vrins17.21"71&DB8号Vrins-1D2 79°71fiQ9£EVrms137.21°c8966.69Vrins-4.23a66967自7Vrifls-124.23*689SB.45Vrttis113.77°£

48、34.36Arms3.92"f f /!C 、L1呻ji厂1 n d> MS/Vc> M4/Va> H4 / Vb > M/VeA M3/Va> M3/Vb> M3/Ve> M2/Va> M2/Vti> M2/Vc * Hl/Vfl.> Hl/Vb > Ml/Vc>M9/laDisplay:I I States厨 Measurements SourcesJ Nonlinear elemwlsFormat:Ckrse精品文档分析系统各节点电压大小是否满足系统要求，若不满足如何进行调整?4、保持负荷有功功率不变，改变

49、无功负荷，观察记录各母线电压。保持无功负 荷不变，改变有功负荷，观察记录各发电机母线功角。保持负荷不变，改变变压 器变比，观察记录各母线电压。F Powergui Initial States Setting Tool, modeh c4s21:(11)pnase_ AL3 -a.i&Hye+uun A2(11)phase BL3=8.0447e+OOl k3:(11)phase： CL3=2.2B44e+D口2 A气：(11)phase_ALl=-2.6 口 Tm+ClCC k5!(11)phase BLl-8.97314+002 k6 :111)phase CLl=-E5174e+

50、D02 A7:(Uc)Cp in ALl二 =7.1iOOe+D03 V81(Uc)Cp in BLlcm张+0口理Vg :(Uc)Cp in. CLl=甘.7a33e+D04 V10:(Uc)Cgn且 inLl= 一2日lD7e-DDa V11;(Uc)Cp out A： LI-3-9967-+004 V12:(Uc)Cp out B: Ll-9.S7S9*+004 V13 :(Uc)Cp out C: Ll=EB791e+D04 V14:(Uc)Cgnd out: Ll二6.300i9e-009 V15:(II)phase AL2-2.S503e+002 klc：(II)phase EL2

51、=-8.7744e+D02 A17:(IL)phase CL2=11625e+0D3 A1;(Uc)Cp in AL2-3,9967e+004 V1S:(Uc)Cp out A: L2=-6.7420*+D03 V20:(UcfCp out E: L2= 一起.72 3 3e-FD04 VZX：(Uc)Cp out C:;L2=7 ., 3975e+004 V22 :(Uc)Cgnd out: L2-£.3205*-011 V23 :(II)transfo1 Lm: T2=一1£322e+D0O A24:.Iltransf2 winding 2: T2=7口963e+D口工

52、 AZS；(II)tcansfo2T2-启1551e-001 k2G：(II)transfo3 Winding 2: T2=-2,159S*+D03 k27:(II)transf3 Lid : T2=81fi72e-D01 A33:(II)transfo1 Lm： T1=-l,521Ze+000 A29:(II)ransto2 binding 2: T1-2,9990e+003 A30:(II)transf2 Lm : T1=2 4992e-D01 A31:(II)transf3 Tuinding 2 : T1-2.9 口83 巳+DC13 JL32 :(II)cransfo3_Lm: T112713e+口口D ADEPENDENT STATES(initial valuesare not computedJ33 :(Uc)Uc Cp In B: L2*34:(Uc)Uc Cp in C: L2*35:(Uc)Uc Ugndin: L2*3E:(II)11 transfo_l_ winding 2:T2*37:(11)Il transfo- 1 winding 2 :Tl*Initel electrical state： values