Ok, the picture helps. As long as branches 15, 21 and 26 are open, then you essentially have 3 separate disconnected radial systems. I’m not sure the radial power flow algorithms recently added to MATPOWER are capable of handling them as a single case. The standard Newton-Raphson power flow, on the other hand should be able to handle them just fine as long as each substation bus is specified as type REF.
If, on the other hand, those branches are closed, creating a meshed system, you will need to convert the extra REF buses to PV, so that you only have a single REF bus per island. You can always use extract_islands() to pull out the radial sub-networks and then solve them using the radial power flow algorithms, but there isn’t an automated way to combine the solve cases back together. Ray > On May 31, 2017, at 9:27 AM, Andrey Vieira <[email protected]> wrote: > > Mr. Ray, that's exactly it. I will try to exemplify the question again using > the 16 buses radial system. In this system, there are 3 bars (3 substations) > that provide the power for the entire electrical network. This system > consists of three feeders. With this, there is one substation for each feeder. > > <pastedImage.png> > My question is can I consider all the substation bars (1,2 and 3) as > generation bars (PV)? For this consideration, the radial system will be > considered as a meshed system. See example below. > With this, the radial distribution system of 16 buses will be considered as a > meshed system. With this, the results will be affected? > > TCL MERGE ERROR ( 05/31/2017 14:13:23 ): "extra characters after close-quote" OutmailID: 121571508, List: 'matpower-l', MemberID: 75174736 SCRIPT: "bus data > % bus type Pd Qd Gs Bs area Vm Va baseKV zone Vmax Vmin > mpc.bus = [ > 1 3 0.0 0.0 0 0 1 1.00 0 11 1 1.05 0.950; > 2 3 0.0 0.0 0 0 1 1.00 0 11 1 1.05 0.950; > 3 3 0.0 0.0 0 0 1 1.00 0 11 1 1.05 0.950; > 4 1 2.0 1.6 0 0 1 1.00 0 11 1 1.05 0.950; > 5 1 3.0 1.5 0 1.1 1 1.00 0 11 1 1.05 0.950; > 6 1 2.0 0.8 0 1.2 1 1.00 0 11 1 1.05 0.950; > 7 1 1.5 0.2 0 0 1 1.00 0 11 1 1.05 0.950; > 8 1 4.0 2.7 0 0 1 1.00 0 11 1 1.05 0.950; > 9 1 5.0 3.0 0 1.2 1 1.00 0 11 1 1.05 0.950; > 10 1 1.0 0.9 0 0 1 1.00 0 11 1 1.05 0.950; > 11 1 0.6 0.1 0 0.6 1 1.00 0 11 1 1.05 0.950; > 12 1 4.5 2.0 0 3.7 1 1.00 0 11 1 1.05 0.950; > 13 1 1.0 0.9 0 0 1 1.00 0 11 1 1.05 0.950; > 14 1 1.0 0.7 0 1.8 1 1.00 0 11 1 1.05 0.950; > 15 1 1.0 0.9 0 0 1 1.00 0 11 1 1.05 0.950; > 16 1 2.1 1.0 0 1.8 1 1.00 0 11 1 1.05 0.950; > ]; > > > Or should I always consider a reference bar (for example, bar 1) and the other two as generation bar (bars 2 and 3)? > > De: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]>> em nome de Ray Zimmerman <[email protected] <mailto:[email protected]>> > Enviado: terça-feira, 30 de maio de 2017 20:17 > Para: MATPOWER discussion forum > Assunto: Re: How to indicate in MATPOWER the use of several substations in the cases of radial distribution systems? > > I’m not sure I understand what you mean by a radial system with more than one substation. You definitely don’t want to set multiple buses of type REF, though you could use type PV for all but one of the substations, but that is equivalent to turning a radial system into a meshed system. > > Ray > > >> On May 26, 2017, at 10:27 AM, Andrey Vieira <[email protected] <mailto:[email protected]>> wrote: >> >> Hi All! I have a question about the use of several substation bars in the case of radial distribution systems with more than one substation. >> Examples: >> A) Case 16 buses : it has 3 substations; >> B) Case 135 buses: it has 2 substations; >> C) Case 84 buses : it has 11 substations. >> >> In the case of 84 buses, for example, can I identify all substation buses with different numberings and indicate that all 11 buses are of >> type 3 in the mpc.bus matrix? Instead of numbering all 11 with the same number (1 for exemplo)? >> >> Can anybody advice on representation these sources in MATPOWER? >> >> Andrey R Vieira --Apple-Mail=_F1BE48AE-45AF-4CD2-B376-C65A823254A5 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" <html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Ok, the picture helps. As long as branches 15, 21 and 26 are open, then you essentially have 3 separate disconnected radial systems. I’m not sure the radial power flow algorithms recently added to MATPOWER are capable of handling them as a single case. The standard Newton-Raphson power flow, on the other hand should be able to handle them just fine as long as each substation bus is specified as type <font face="Courier" class="">REF</font>.<div class=""><br class=""></div><div class="">If, on the other hand, those branches are closed, creating a meshed system, you will need to convert the extra <span style="font-family: Courier;" class="">REF</span> buses to <font face="Courier" class="">PV</font>, so that you only have a single <span style="font-family: Courier;" class="">REF</span> bus per island.</div><div class=""><br class=""></div><div class="">You can always use <font face="Courier" class="">extract_islands()</font> to pull out the radial sub-networks and then solve them using the radial power flow algorithms, but there isn’t an automated way to combine the solve cases back together.</div><div class=""><br class=""></div><div class=""> Ray</div><div class=""><br class=""><div class=""><br class=""><div class=""><br class=""><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On May 31, 2017, at 9:27 AM, Andrey Vieira <<a href="mailto:[email protected]"; class="">[email protected]</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 14pt; font-family: Calibri, Arial, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span id="result_box" class="" lang="en"><span class="">Mr. Ray, that's exactly it.</span><span class="Apple-converted-space"> </span><span class="">I will try to exemplify the question again using the 16 buses radial system.</span><span class="Apple-converted-space"> </span><span class="">In this system, there are 3 bars (3 substations) that provide the power for the entire electrical network.</span><span class="Apple-converted-space"> </span><span class="">This system consists of three feeders.</span><span class="Apple-converted-space"> </span><span class="">With this, there is one substation for each feeder.</span></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span id="result_box" class="" lang="en"><span class=""><br class=""></span></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span id="result_box" class="" lang="en"><span class=""><span id="cid:75f08e88-f6da-460a-8a51-83b014a765ec"><pastedImage.png></span><br class=""></span></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span id="result_box" class="" lang="en"><span class=""></span></span><span id="result_box" class="" lang="en"><span class="">My question is can I consider all the substation bars (1,2 and 3) as generation bars (PV)?</span><span class="Apple-converted-space"> </span><span class="">For this consideration, the radial system will be considered as a meshed system. See example below.</span></span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span id="result_box" class="" lang="en"><span class="">With this, the radial distribution system of 16 buses will be considered as a meshed system.</span><span class="Apple-converted-space"> </span><span class="">With this, the results will be affected?</span></span><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div id="Signature" class=""><div class=""><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New'; color: forestgreen;" class="">" bus data</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New'; color: forestgreen;" class="">% bus type<span class=""> <span class="Apple-converted-space"> </span></span>Pd<span class=""> <span class="Apple-converted-space"> </span></span>Qd<span class=""> <span class="Apple-converted-space"> </span></span>Gs<span class=""> <span class="Apple-converted-space"> </span></span>Bs area<span class="Apple-converted-space"> </span><span class=""> </span>Vm<span class=""> <span class="Apple-converted-space"> </span></span>Va baseKV<span class=""> <span class="Apple-converted-space"> </span></span>zone<span class="Apple-converted-space"> </span><span class=""> </span>Vmax<span class=""> <span class="Apple-converted-space"> </span></span>Vmin</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class="">mpc.bus = [</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>1<span class="Apple-converted-space"> </span><span class=""> </span><span class=""> </span>3<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>0.0<span class="Apple-converted-space"> </span><span class=""> </span>0.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>2<span class="Apple-converted-space"> </span><span class=""> </span>3<span class=""> <span class="Apple-converted-space"> </span></span>0.0<span class=""> <span class="Apple-converted-space"> </span></span>0.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.05<span class="Apple-converted-space"> </span><span class=""> </span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> </span><span class=""> <span class="Apple-converted-space"> </span></span>3<span class="Apple-converted-space"> </span><span class=""> </span>3<span class=""> <span class="Apple-converted-space"> </span></span>0.0<span class=""> <span class="Apple-converted-space"> </span></span>0.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>4<span class="Apple-converted-space"> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>2.0<span class="Apple-converted-space"> </span><span class=""> </span>1.6<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class="Apple-converted-space"> </span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>5<span class="Apple-converted-space"> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>3.0<span class=""> <span class="Apple-converted-space"> </span></span>1.5<span class="Apple-converted-space"> </span><span class=""> </span>0<span class=""> <span class="Apple-converted-space"> </span></span>1.1 1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.05<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>6<span class="Apple-converted-space"> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>2.0<span class=""> <span class="Apple-converted-space"> </span></span>0.8<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1.2 1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class="Apple-converted-space"> </span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>7<span class="Apple-converted-space"> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>1.5<span class="Apple-converted-space"> </span><span class=""> </span>0.2<span class="Apple-converted-space"> </span><span class=""> </span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>8<span class="Apple-converted-space"> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>4.0<span class=""> <span class="Apple-converted-space"> </span></span>2.7<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>9<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>5.0<span class="Apple-converted-space"> </span><span class=""> </span>3.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1.2 1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class="Apple-converted-space"> </span><span class=""> </span>1.05<span class="Apple-converted-space"> </span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>10<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.0<span class="Apple-converted-space"> </span><span class=""> </span>0.9<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>0.6<span class=""> <span class="Apple-converted-space"> </span></span>0.1<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0.6 1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>12<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>4.5<span class="Apple-converted-space"> </span><span class=""> </span>2.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>3.7 1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span>1</span><span class=""><span class="Apple-converted-space"> </span> <span class="Apple-converted-space"> </span></span><span class=""></span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>13<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>1.0<span class=""> <span class="Apple-converted-space"> </span></span>0.9<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class="Apple-converted-space"> </span><span class=""> </span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>14<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class="Apple-converted-space"> </span><span class=""> </span>1.0<span class=""> <span class="Apple-converted-space"> </span></span>0.7<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1.8<span class=""> <span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>15<span class=""> <span class="Apple-converted-space"> </span></span>1<span class="Apple-converted-space"> </span><span class=""> </span>1.0<span class=""> <span class="Apple-converted-space"> </span></span>0.9<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>16<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>2.1<span class=""> <span class="Apple-converted-space"> </span></span>1.0<span class=""> <span class="Apple-converted-space"> </span></span>0<span class=""> <span class="Apple-converted-space"> </span></span>1.8<span class=""> <span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.00 0<span class=""> <span class="Apple-converted-space"> </span></span>11<span class=""><span class="Apple-converted-space"> </span></span>1<span class=""> <span class="Apple-converted-space"> </span></span><span class=""> </span>1.05<span class=""> <span class="Apple-converted-space"> </span></span>0.950;</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div><div style="margin-top: 0px; margin-bottom: 0.0001pt; line-height: normal;" class=""><span style="font-size: 10pt; font-family: 'Courier New';" class=""><span class=""> <span class="Apple-converted-space"> </span></span>];</span><span style="font-size: 12pt; font-family: 'Courier New';" class=""></span></div></div><br class=""><div id="divtagdefaultwrapper" style="font-size: 14pt; background-color: rgb(255, 255, 255); font-family: Calibri, Arial, Helvetica, sans-serif, EmojiFont, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols;" class=""><div class=""><span style="color: rgb(34, 34, 34); font-family: arial; font-size: 10pt;" class=""><br class=""></span></div><span style="color: rgb(34, 34, 34); font-family: arial; font-size: 10pt;" class=""></span></div></div><span id="result_box" class="" lang="en"><span class="">Or should I always consider a reference bar (for example, bar 1) and the other two as generation bar (bars 2 and 3)?</span></span><br class=""><br class=""><div style="" class=""><hr tabindex="-1" style="display: inline-block; width: 1043.6875px;" class=""><div id="divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">De:</b><span class="Apple-converted-space"> </span><a href="mailto:[email protected]"; class="">[email protected]</a><span class="Apple-converted-space"> </span><<a href="mailto:[email protected]"; class="">[email protected]</a>> em nome de Ray Zimmerman <<a href="mailto:[email protected]"; class="">[email protected]</a>><br class=""><b class="">Enviado:</b><span class="Apple-converted-space"> </span>terça-feira, 30 de maio de 2017 20:17<br class=""><b class="">Para:</b><span class="Apple-converted-space"> </span>MATPOWER discussion forum<br class=""><b class="">Assunto:</b><span class="Apple-converted-space"> </span>Re: How to indicate in MATPOWER the use of several substations in the cases of radial distribution systems?</font><div class=""> </div></div><div class="">I’m not sure I understand what you mean by a radial system with more than one substation. You definitely don’t want to set multiple buses of type REF, though you could use type PV for all but one of the substations, but that is equivalent to turning a radial system into a meshed system.<div class=""><br class=""></div><div class=""> Ray</div><div class=""><br class=""><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On May 26, 2017, at 10:27 AM, Andrey Vieira <<a href="mailto:[email protected]"; class="">[email protected]</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" dir="ltr" class="" style="font-style: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; font-size: 14pt; font-family: Calibri, Arial, Helvetica, sans-serif;"><p class="" style="margin-top: 0px; margin-bottom: 0px;"></p><div class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">Hi All! I have a question about the use of several substation bars in the case of radial distribution systems with more than one substation.</span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">Examples:</span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> A) Case 16 buses : it has 3 substations;</span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> B) Case 135 buses: it has 2 substations;</span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> C) Case 84 buses : it has 11 substations.</span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> <span class="Apple-converted-space"> </span></span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">In the case of 84 buses, for example, can I identify all substation buses with different numberings and indicate that all 11 buses are of<span class="Apple-converted-space"> </span></span><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">type 3 in the mpc.bus matrix? Instead of numbering all 11 with the same number (1 for exemplo)?</span><br class=""><br class=""><span class="" style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">Can anybody advice on representation these sources in MATPOWER?</span></div><p class="" style="margin-top: 0px; margin-bottom: 0px;"></p><div class="" style="margin-top: 0px; margin-bottom: 0px;"><br class=""></div><div class="" style="margin-top: 0px; margin-bottom: 0px;">Andrey R Vieira</div></div></div></blockquote></div></div></div></div></div></div></div></blockquote></div><br class=""></div></div></div></div></body></html>
