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 >> >> >> >> >
