Re: Question regarding Matpower's continuation power flow

continuation power flow Check twice before you click! This email originated from outside PNNL. Dear friends I have been running the continuation power flow for several networks. In the case of "case2869pegase", I counted 92 rollbacks. However, "events" is a struct with dimension [1x9

Question regarding Matpower's continuation power flow

Dear friends I have been running the continuation power flow for several networks. In the case of "case2869pegase", I counted 92 rollbacks. However, "events" is a struct with dimension [1x98]. I was expecting that the dimension of "events" was [1x92], t

Re: Question about the continuation power flow

122159463-73493...@list.cornell.edu> on behalf of Young-Hwan Lee <le...@umbc.edu> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Date: Thursday, December 28, 2017 at 10:13 AM To: "MATPOWER-L@cornell.edu" <MATPOWER-L@cornell.edu> Subject: Question ab

Question about the continuation power flow

To whom it may concern, I'm trying to solve an easy problem with case39 using the continuation power flow. I set the base case as origin, which is PG, PD, QD are all zero. I do not change any values for the target case, which means I just use the initial values. In addition, I set the reactive

Continuation Power Flow - Target case data

Hi, Forgive me for asking but I'm quite new to CPF. What I don't get is the concept of target case data. As I far I can understand, the CPF helps us identify the point of voltage collapse in a network, so what is the relevance of a target case data ? Thank You, Sanjay

Re: load reduction in continuation power flow (CPF)

t; Date: Thursday, February 16, 2017 at 8:28 AM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.cornell.edu>> > Subject: Re: load reduction in continuation power flow (CPF) > > The code looks correct to me. I’m not sure why the

Re: load reduction in continuation power flow (CPF)

m <matpowe...@list.cornell.edu> > Subject: Re: load reduction in continuation power flow (CPF) > > The code looks correct to me. I’m not sure why the load margin decreases, > but the changes in load (from positive to equally negative) may be forcing > the OPF solution into generator dis

Re: load reduction in continuation power flow (CPF)

to:matpowe...@list.cornell.edu>> Subject: Re: load reduction in continuation power flow (CPF) The code looks correct to me. I’m not sure why the load margin decreases, but the changes in load (from positive to equally negative) may be forcing the OPF solution into generator dispatch solutions

Re: load reduction in continuation power flow (CPF)

The code looks correct to me. I’m not sure why the load margin decreases, but the changes in load (from positive to equally negative) may be forcing the OPF solution into generator dispatch solutions that somehow reduce the load margin. Ray > On Feb 15, 2017, at 10:45 PM, Majid Mehdizadeh

load reduction in continuation power flow (CPF)

Dear sir and matpower committee It is very strange for me that when the load of some PQ buses in IEEE 39 bus test system are reduced and then cpf is performed then the load margin of the system is becoming lower . It should be noted that i use the following code to estimate the load margin of the

Re: Continuation Power Flow

to:matpowe...@list.cornell.edu>> Subject: Re: Continuation Power Flow Thanku so much sir for your help. But how can i plot real power flow at each iteration of cpf. Sent from Yahoo Mail on Android<https://overview.mail.yahoo.com/mobile/?.src=Android> _

Re: Continuation Power Flow

If by “real power flow” you mean the power transfer, then you can compute it from the lambda and the base and target power injections (loads, generations) according to equations (5.2)–(5.4) in the User’s Manual . The lambdas

Re: Matpower- Continuation Power Flow

a MATPOWER case struct that has the loading/genration and the voltages at its last continuation step. By using the option 'cpf_stop_at_nose', the continuation power flow will stop when it is near the nose point. You can then extract the voltages and power from the MATPOWER case struct

Re: Matpower- Continuation Power Flow

. By using the option 'cpf_stop_at_nose', the continuation power flow will stop when it is near the nose point. You can then extract the voltages and power from the MATPOWER case struct. For example, define_constants; mpopt = mpoption('out.all',0,'verbose',2); mpopt = mpoption('cpf.stop_at

Re: Matpower- Continuation Power Flow

for mpcb and mpct and run the continuation power flow again. See the MATPOWER User's Manual http://www.pserc.cornell.edu//matpower/manual.pdf for a CPF example on a test 9-bus case. Shri From: arun s nair arunsnair...@gmail.com mailto:arunsnair...@gmail.com Reply-To: MATPOWER discussion

Re: Matpower- Continuation Power Flow

to get the values using Matpower using continuation power flow ? I am trying to modify the example code from the manual (I am working on IEEE 39 bus system) define_constants; mpopt = mpoption('out.all',0,'verbose',2); mpopt = mpoption('cpf.stop_at','nose','cpf.step',0.2); mpopt = mpoption

Re: Matpower- Continuation Power Flow

runcpf returns a MATPOWER case struct that has the loading/genration and the voltages at its last continuation step. By using the option 'cpf_stop_at_nose', the continuation power flow will stop when it is near the nose point. You can then extract the voltages and power from the MATPOWER case

Matpower- Continuation Power Flow

Hi All I am trying to use matpower to evaluate IEEE 39 bus system and I tried to run an example code for runcpf (Continuation Power Flow) define_constants; mpopt = mpoption('out.all',0,'verbose',2); mpopt = mpoption('cpf.stop_at','nose','cpf.step',0.2); mpopt = mpoption(mpopt,'cpf.plot.level

Re: Matpower- Continuation Power Flow

Arun, You have the same generation/load for both the base (mpcb) and target (mpct) cases. What are you seeing is that runcpf is solving the base case over and over again since there is zero power transfer. Use different generation/load for mpcb and mpct and run the continuation power flow

AVAILABLE TRANSFER CAPABILITY CALCULATION BY CONTINUATION POWER FLOW METHOD

Hello sir, The matlab code posted below is used for the calculation of ATC using continous power flow equation. The iteration must limit the ATC on voltage collapse and must display the relevant graphs. But the below code uses a modified runpf subroutine which I am unable to figure it