Network simplex method applied to AC load-flow calculation

Journal Article · Sun Feb 01 04:00:00 EST 1987 · IEEE Trans. Power Syst.; (United States)

DOI:https://doi.org/10.1109/TPWRS.1987.4335100· OSTI ID:6984013

Barras, J; Alec, S; Pasche, C; Chamorel, P A; De Werra, D; Germond, A J

Operational research methods, and particularly flow and transportation methods have many applications in the power system field: optimization of hydroelectric power system operation, seasonal or short-time planning of a hydro-thermal system and finally power system security. The purpose of this paper is to specify the network simplex method of the load-flow calculation in a power system. This study is not limited to the DC-flow calculation but particularly presents a model for the full AC load-flow calculation. The proposed model is an imaginary and real current one. It is based on a simplifying assumption which will allow decoupling of the problem and which is the basis of the algorithm called FLF (FLow Load-Flow algorithm). Power system elements such as lines, transformers, generators and voltage control busses are represented with adapted models. Systematic tests have been performed on some existing power systems, such as the IEEE 24-bus Reliability system. The performance of this method is compared with the results of a decoupled Newton-Raphson load-flow. The accuracy of the FLF algorithm is competitive with the Newton-Raphson method, but its speed still has to be improved. However the load-flow calculation is only a part of the power system security problem, where properties and characteristics of flow and transportation algorithms will offer greater perspective.

• Research Organization: Swiss Federal Institute of Technology, 1007 Lausanne
• OSTI ID: 6984013
• Journal Information: IEEE Trans. Power Syst.; (United States), Journal Name: IEEE Trans. Power Syst.; (United States) Vol. PWRS-2:1; ISSN ITPSE
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
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AC SYSTEMS
ACCURACY
ALGORITHMS
ALTERNATING CURRENT
CALCULATION METHODS
CURRENTS
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRIC GENERATORS
ELECTRIC UTILITIES
ELECTRICAL EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
HYDROELECTRIC POWER PLANTS
LOAD ANALYSIS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
OPERATION
OPERATIONS RESEARCH
OPTIMIZATION
PERFORMANCE
PLANNING
POWER PLANTS
POWER SYSTEMS
POWER TRANSMISSION LINES
PUBLIC UTILITIES
RELIABILITY
TRANSFORMERS
VOLTAGE REGULATORS