Re: Non-Convergence of Load Flow in Reconfiguration / Restoration Situations (via Optimization)

I would suggest that you try to use the option for setting exp.sys_wide_zip_loads.pw. If you model all loads as constant admittances by using pw = [0 0 1] you will certainly get a solution with YSUM since in this case the network is linear and the solution will be obtained in single iteration. If

Re: Non-Convergence of Load Flow in Reconfiguration / Restoration Situations (via Optimization)

Mr. Ray, thanks for the answer! But in addition to the runpf () function, in what other functions should I make the change in the number of iterations? De: bounce-121637368-77188...@list.cornell.edu em nome de Ray

Re: Power Flow for Radial Test Systems with several Feeders

Dear Mr. Todorovski, thanks for the answer! De: bounce-121631454-77188...@list.cornell.edu em nome de Mirko Todorovski Enviado: quinta-feira, 29 de junho de 2017 21:10 Para: MATPOWER

Re: Non-Convergence of Load Flow in Reconfiguration / Restoration Situations (via Optimization)

If you haven’t tried it, certainly try increasing the number of iterations for the radial methods. Ray > On Jul 3, 2017, at 3:15 PM, Andrey Vieira wrote: > > for Reconfiguration/Restoration process, ie: > > Occurrence of significant concentration of buses/Loads in a

Non-Convergence of Load Flow in Reconfiguration / Restoration Situations (via Optimization)

for Reconfiguration/Restoration process, ie: Occurrence of significant concentration of buses/Loads in a given healthy region (region that will receive some or all of the disconnected Loads) Of the feeder (as shown below) via the relocation of disconnected loads (optimization process) due to the

Re: Need assistance

1. I would simply copy an existing case file and then modify the data to match your system. 2. For a generator representing a renewable source, you will need to update PG (for a power flow) or PMAX (for an OPF) to indicate the renewable power available at the time being simulated by your power

Re: DCOPF not converging for large system

If you have a solved AC power flow, that’s a good start. Normally, the first step I try when faced with an OPF that won’t converge is to eliminate the branch flow limits by setting the RATE_A column of the branch matrix to zero (or by increasing the values by some factor). In your case, you can

Re: Creating the chgtab Matrix in MATPOWER in Case30

The apply_changes() function can be used to disable branches and buses by setting the BR_STATUS to column to 0 for a branch or the BUS_TYPE column to NONE for a bus, but it cannot be used to actually delete rows from the branch and bus matrices. For example, to disconnect branch 3 and bus 4,

Re: Optimization terminated but constraints are not satisfied.

MATPOWER does not use GA for any of its optimizations, so it seems like this is related to your own code and not to MATPOWER. I suggest checking the documentation for the GA solver you are using. Ray > On Jun 21, 2017, at 4:14 AM, Roshani Thapa wrote: > > I

Re: DCOPF not converge

Hi Prem, If you are solving each island individually, the DC OPF should converge as long as (1) you have a reference bus in the island, (2) there is adequate generation to cover the load in the island, and (3) the line constraints do not prevent the generated power from reaching the loads.

Re: Current missmatch Load Flow

The general power flow formulation does not include a current mismatch version, though the latest dev version on GitHub does include a current summation method for radial systems. Ray > On Jun 9, 2017, at 6:14 AM, Bone, Gorazd wrote: > > Hi all , > > I was

Re: Matpower extras in github

Hi Eran, Sorry for the delay in responding. I just got back from some time off. You are right about the matpower-extras. Hopefully, the directions in the README at https://github.com/MATPOWER/matpower-extras will work for you … namely … To install, simply place the contents of this repository

Re: MOST, unit commitment

There is not necessarily anything unusual about this. If the generators are relatively expensive and their PMIN value is zero, it may be economical to dispatch them at 0 MW output. Ray > On Jun 9, 2017, at 8:15 PM, Xinwen Ni wrote: > > Hi, all > > I built a test