Congestion control in electric power system under load and uncertainty
A method for operating a power generating facility connected to a power distribution grid having an uncertain power generation condition includes predicting a probabilistic power flow forecast in a transmission line of the power distribution grid for a period of time, wherein the transmission line is electrically coupled to the power generating facility, predicting, using the probabilistic power flow forecast, a probability of congestion over the transmission line of the power distribution grid during the period of time, generating a mitigation plan, including a load adjustment on the transmission line, using the probability of congestion predicted over the transmission line and a thermal limit constraint of the transmission line, wherein the mitigation plan balances the load adjustment and an overlimit line capacity on the transmission line, and controlling the power generating facility, using the mitigation plan, to achieve the load modification and mitigate the probability of congestion predicted in the transmission line.
1. A method for operating a power generating facility connected to a power distribution grid having an uncertain power generation condition, the method comprising:
predicting a probabilistic power flow forecast in a transmission line of the power distribution grid for a period of time, wherein the transmission line is electrically coupled to the power generating facility;
predicting, using the probabilistic power flow forecast, a probability of congestion over the transmission line of the power distribution grid during the period of time;
generating a mitigation plan, the mitigation plan including a planned load adjustment on the transmission line, using the probability of congestion predicted over the transmission line and a thermal limit constraint of the transmission line, wherein the mitigation plan balances the planned load adjustment and an overlimit line capacity on the transmission line;
controlling the power generating facility, using the mitigation plan, to achieve the load modification and mitigate the probability of congestion predicted in the transmission line; and
controlling load shedding within the power distribution grid using the mitigation plan, wherein controlling the load shedding includes adjusting a magnitude of load shedding on the transmission line based at least on the planned load adjustment on the transmission line, the adjusting the magnitude of load shedding being used to reduce the magnitude of load shedding on the transmission line which experienced load shedding at a previous period of time.
2. The method of claim 1 , further comprising generating the mitigation plan using a voltage limit constraint of a bus in the power distribution grid, and wherein the mitigation plan balances a voltage violation, together with the planned load adjustment and the overlimit line capacity.
3. The method of claim 1 , further comprising controlling a configuration of the power distribution grid using the mitigation plan.
4. The method of claim 3 , further comprising releasing an additional transmission line into the power distribution grid to achieve a change in network topology and reduce a load on the transmission line.
5. The method of claim 1 , further comprising controlling a demand response unit disposed along an edge of the power distribution grid to reduce a load on the transmission line using the mitigation plan.
6. The method of claim 1 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for renewable energy generation in the power distribution grid.
7. The method of claim 1 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for energy demand from consumers in the power distribution grid.
8. The method of claim 1 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for a state of the power distribution grid using a current condition of the power distribution grid.
9. A method for operating a power generating facility connected to a power distribution grid having an uncertain power generation condition, the method comprising:
predicting a probabilistic power flow forecast in a transmission line of the power distribution grid for a plurality of periods of time in a forecast horizon, wherein the transmission line is electrically coupled to the power generating facility;
predicting, using the probabilistic power flow forecast, a probability of congestion over the transmission line of the power distribution grid during the plurality of periods of time in the forecast horizon;
generating a mitigation plan, the mitigation plan including a planned load adjustment on the transmission line, using the probability of congestion predicted over the transmission line and a thermal limit constraint of the transmission line, wherein the mitigation plan balances the planned load adjustment and an overlimit line capacity on the transmission line, wherein the plurality of periods of time are coupled by a constraint on the planned load adjustment at any period;
controlling the power generating facility, using the mitigation plan, to achieve the load modification and mitigate the probability of congestion predicted in the transmission line;
controlling load shedding within the power distribution grid using the mitigation plan, wherein controlling the load shedding includes adjusting a magnitude of load shedding on the transmission line based at least on the planned load adjustment on the transmission line, the adjusting the magnitude of load shedding being used to reduce the magnitude of load shedding on the transmission line which experienced load shedding at a previous period of time.
10. The method of claim 9 , further comprising generating the mitigation plan using a voltage limit constraint of a bus in the power distribution grid, and wherein the mitigation plan balances a voltage violation, together with the planned load adjustment and the overlimit line capacity.
11. The method of claim 9 , further comprising controlling a configuration of the power distribution grid using the mitigation plan.
12. The method of claim 11 , further comprising releasing an additional transmission line into the power distribution grid to achieve a change in network topology and reduce a load on the transmission line.
13. The method of claim 9 , further comprising controlling a demand response unit disposed along an edge of the power distribution grid to reduce a load on the transmission line using the mitigation plan.
14. The method of claim 9 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for renewable energy generation in the power distribution grid.
15. The method of claim 9 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for energy demand from consumers in the power distribution grid.
16. The method of claim 9 , wherein the probabilistic power flow forecast in the transmission line is predicted using a forecast for a state of the power distribution grid using a current condition of the power distribution grid.