REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

EFFICIENT POWER FLOW ALGORITHM, MODIFIED ALGORITHM NAHMAN AND PERIĆ

BRANKO STOJANOVIĆ

Technical testing center, Belgrade, e-mail:stojanovic.branko@rocketmail.com, elektronika@toc.vs.rs

MILAN MOSKOVLJEVIĆ

Technical testing center, Belgrade, e-mail:moskva984@gmail.com, elektronika@toc.vs.rs

TOMISLAV RAJIĆ

Electrical University, Belgrade, e-mail: rajic@etf.rs

Abstract: This paper presents one novel power flow algorithm. Simple matrix equation with bus admittance matrix is used for network voltage calculation. Losses are obtained by deduction of total load consumption from injected power into the slack node. Time consuming forward/backward sweep for Jacobian matrix and Y bus admittance matrix construction is avoided. Simplification and unflexibility is characteristic of many power flow algorithms what is the reason why they can not be used for  distribution network reconfiguration  problem solved by simulated annealing technique. Crucial problem encountered by distribution engineer is feeding computer with incoming data of distribution system what varies from configuration to configuration and is the most time consuming part of the procedure. In presented programme the only thing that ought to be done is setting branch to be open admittance to zero. For this reason this power flow algorithm combined with precise power flow algorithm represents powerful weapon of every distribution engineer for solving dynamic distribution network problems such as reconfiguration or planning.

Keywords: efficient power flow algorithm, distribution network, distribution network reconfiguration, simulated annealing, distribution network planning problem.