Re: Help with matpower

I found the data in "small test system for power system economic studies". The problem is for getting this data do I need to run load flow? If yes how I can run it for 5 case buses. On Mon, Oct 16, 2017 at 8:59 PM, naime ahmadi wrote: > Sorry, you mean in the program. I

Branch data ratio and taps

Hi, all For a given case branch data r, x, b, assuming the branch is a transformer, between bus1 and bus2, with voltages V1 and V2 KV respectively. How do I obtain the Tap ration (column 9) and shift (column 10) of the branch matrix? I have simply used V1/V2 as the Tap ration while the shift is

Re: Branch data ratio and taps

The tap ratio is the off-nominal tap ratio, relating per-unit voltages, not kV voltages. So if both voltages are at their nominal values (i.e. both at 1 p.u.) then the TAP should be 1 and SHIFT should be 0. Ray > On Oct 17, 2017, at 6:23 AM, Ahmad Sadiq Abubakar >

Re: Querry to add renewable generators in the caseformat

How do you plan to model your renewable generators? As a simple MW injection (e.g. equivalent to a negative value in the PD column of the bus matrix)? As a zero-cost generator with a PMAX value that depends on the current wind conditions (why not simply add them to the gen matrix with a zero

Re: Help with matpower

Your original question was not clear enough for me to understand where you are having trouble. In the paper you mention, Table 1 gives the generator capacities (PMAX) and Table 7 gives the generator dispatch (PG), both of which match the case5 included in MATPOWER. To run the power flow, simply

Re: Branch data ratio and taps

Dear Ray, Thanks for your response. In my case, V1 is a generator bus with 1.025 p.u. and V2 is a known PQ bus with 1 p.u. This implied Tap is 1.02? On Oct 17, 2017 4:27 PM, "Ray Zimmerman" wrote: > The tap ratio is the off-nominal tap ratio, relating per-unit voltages, > not

Re: Querry to add renewable generators in the caseformat

Dear Ray, I am planning to add them as a simple MW injection with a negative value and then i want to control them. For example on the bus that a renewable generator is connected i am saving the results for the power flow and then i am setting some rules to control the renewable generator i.e

Re: Branch data ratio and taps

Well, that would only be true if it were a completely ideal transformer with no impedance. Even at the nominal tap ratio of 1.0 the voltages magnitudes will not be identical (as with a transmission line). Ray > On Oct 17, 2017, at 12:19 PM, Ahmad Sadiq Abubakar >

Re: Help with matpower

Dear Ray, Thank you for your response. It means that Table 1, 2,3 and 7 is given by manufacturer and table 6, 8 and 9 is calculated by power flow. On 10/17/17, Ray Zimmerman wrote: > Your original question was not clear enough for me to understand where you > are having