Abstract
The mixed power flow analysis method decreases the computational complexity and achieves a high level of simulation accuracy. The mixed approach combines the ac with the dc power flow models, depending on the area of interest. The accurate ac model is used in the study area of interest to obtain high simulation accuracy, while the approximate dc model is used in the remainder of the system to reduce the required computations. In the original mixed approach, the errors originating from the use of the dc model may propagate to the area of interest where accurate simulation outcomes are required; thus, the simulation accuracy might not be satisfactory. This paper presents a new method of enhancing the simulation accuracy of the mixed power flow analysis using available information. In the proposed approach, a modified dc model is used instead of the traditional one and is constructed from an initial base-case ac solution. The new dc model compensates for the errors originating from the neglect of the real power losses and the assumption of a flat voltage magnitude in the conventional dc model. Thus, the proposed method can improve the simulation accuracy in the area of interest. The superior computational benefits can also be preserved by maintaining linear characteristics of the dc model. Case studies with the IEEE 118-bus system are provided to validate the enhanced accuracy of the proposed method.
Highlights
Steady-state power flow analysis is a fundamental tool and the most frequently used routine in power system planning, operations, and control
In practical power system operations, various applications are investigated with prior knowledge about the present power system conditions including initially solved ac power flow solutions
Management System) application program that identifies the current operating state of the system [14,15]. This additional information can be utilized to construct the hot-start dc models, which take the place of the cold-start model in the original mixed approach
Summary
Steady-state power flow analysis is a fundamental tool and the most frequently used routine in power system planning, operations, and control It provides the bus voltages of each bus, and the power flows through a transmission network for a specified load and generator information. The primary and the most accurate approach for power flow analysis models the electric power networks with a set of nonlinear power balance equations; this is typically referred to as the ac model. Management System) application program that identifies the current operating state of the system [14,15] This additional information can be utilized to construct the hot-start dc models, which take the place of the cold-start model in the original mixed approach. This paper presents a new method to enhance the simulation accuracy of the mixed power flow analysis.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
