Retrieve difference between power generation and total load

asked 2020-08-18 01:43:50 -0500

ShaHe23
7 ●3 ●4 ●4

Hello everyone, I've tried to implement dynamic load shedding scheme in PSSE other than using load relay models (LVSHBL, DLSHBL etc.). For this I want to detect a sudden power imbalance between load and generation during a simulation. I am trying to trigger a power mismatch by tripping a larger generator of my system at 50 s, during 100 s simulation. It is a real time measurement. Can someone send me an example code for this it'll be a big help for me.

answered 2020-08-18 07:06:35 -0500

perolofl

3312 ●1 ●8 ●18

updated 2020-08-19 00:58:27 -0500

Use channels for "Subsystem Power Totals" and select "All buses". Five channels are added:

1: TOTAL PMECH

2: TOTAL PELEC

3: TOTAL accelerating power

4: TOTAL PLOAD

5: TOTAL PELEC - PLOAD

The total accelerating power is a good indicator of the deficit of turbine power in the system.

In a script, use psspy.chnval to retrieve the accelerating power during the simulation.

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psspy.chsb(1, STATUS(4)=7) using this I can get Total power for all buses. But how can I get the total PLOAD value? psspy.chsb(sid=0, all=1,status=[-1,-1,-1,1,25,0]) this gives PLOAD values for each load.