Power flow analysis in power systems and planning is used to calculate voltage magnitude and angles across power grids. It gives information regarding how power generation and demand is balanced in a system and if there is any excess in demand or shortage in generation that needs to be taken care of. Other applications include but not limited to electricity nodal pricing, unit commitment, expansion planning, contingency analysis, and congestion management. Current power flow analysis is categorized to AC and DC power flow methods. AC power flow has better accuracy compared to DC, however, it is highly nonlinear and less efficient. DC power flow on the other hand has better efficiency since the equations are linear, however, the simplicity due to a single linear approximation results to low accuracy.
The disclosed technology proposes a power flow analysis model and formulation, which basically is founded on introducing new state variables for power system analysis. Here, the non-linear power system problem is solved with complete linearization without sacrificing the accuracy of the model. The proposed method is faster than the Newton-Raphson based AC power flow and offers better accuracy than the current practiced DC power flow.
Reference Number: D-1236
- Electric Power Transmission
- Smart Grid
- Power Engineering
Features, Benefits & Advantages:
- Faster than the NR-based AC power flow
- Improved convergence performance
- The accuracy is remarkably higher than the DC power flow
- Optimal Power flow
A U.S. Provisional Patent, serial number 62/233,600 was filed on 9/28/15 and a PCT application was filed 9/27/16.
The disclosed technology has been developed, proven, and tested. However, work is currently being done to finalize the implementation as a software function.
Sajjad Abedi, PhD Student, Department of Electrical & Computer Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX 79409.
Seyed Masoud Fatemi, Research Assistant, Amirkabir University of Technology, Iran.
Keywords: Power flow analysis in power systems, Power and load flow, Power system operation, Power system planning