It is a planning case 2020 WECC system On Tue, Apr 3, 2018 at 12:25 PM, Jovan Ilic <[email protected]> wrote:
> > Vikram, > > For what year is this WECC system? > > Jovan > > > On Tue, Apr 3, 2018 at 11:54 AM, vikram reddy <[email protected]> > wrote: > >> I have a 20000 bus WECC system in PSSE raw format. I am trying to run the >> DC power flow, but the total of the power injections that I got from >> MATPOWER does not equal to zero. Are the voltage angles obtained in this >> case wrong? >> >> Thanks, >> Vikram >> >> On Tue, Apr 3, 2018 at 6:46 AM, Ray Zimmerman <[email protected]> wrote: >> >>> There is no need to check. The slack bus active power will be adjusted >>> to make the injections sum to zero. And the DC power flow in MATPOWER is a >>> lossless approximation. That is, it assumes the losses are zero. >>> >>> Ray >>> >>> >>> On Mar 28, 2018, at 2:28 PM, vikram reddy <[email protected]> >>> wrote: >>> >>> Hi, >>> >>> I am working on a 20000 bus system and running a DC load flow. Now, the >>> power injection vector computed as >>> >>> Pbus = real(makeSbus(baseMVA, bus, gen)) - Pbusinj - bus(:, GS) / >>> baseMVA; >>> >>> In general, the total of the power injection vector should be zero >>> implying generation=load+losses. MATPOWER does not do the checking if the >>> total of injection vector is zero. >>> >>> 1. Why does MATPOWER not check if the total of injection vector goes to >>> zero? Is it not important? >>> 2. What happens if the injection vector is not zero and running the DC >>> load flow? I assume the voltage angles thus obtained will have an error. >>> 3. Assuming losses is the total sum of Pbus vector, how should the >>> losses be distributed? >>> >>> Thanks, >>> Vikram >>> >>> >>> >>> >> >
