Initial results in an approximate optimal capacitor placement for radial distribution systems
06 Jun 2004-pp 336-341
TL;DR: Based on the analytical results, a simple approximate optimal capacitor placement algorithm is proposed that guarantees to approximately reach the global optimal solution, with a small number of calculations.
Abstract: Analytical results of the capacitor placement for radial distribution power systems are presented in this paper. Based on the analytical results, a simple approximate optimal capacitor placement algorithm is proposed. Unlike existing optimal capacitor placement algorithms, the proposed algorithm formulates the optimal capacitor placement problem in a simple form instead of an integer nonlinear programming problem. The proposed algorithm guarantees to approximately reach the global optimal solution, with a small number of calculations. Simulation results of the proposed algorithm on 10 bus system and 30 bus system are presented in this paper.
Citations
More filters
20 Jul 2011
TL;DR: In this article, the authors presented a study on the modeling of a D-STATCOM (Distribution Static Compensator) used for mitigating voltage sag on a distribution network.
Abstract: This paper presents a study on the modeling of a D-STATCOM (Distribution Static Compensator) used for mitigating voltage sag on a distribution network. The power circuits of the D-STATCOM and the distribution network are modeled by specific blocks from the Power System Block set while the control system is modeled by Simulink blocks. A main feeder feeding a 10 MW load is abruptly disturbed by the inclusion of a sudden load of 10 MW thereby creating voltage sag. This voltage sag is corrected by the static compensator.
10 citations
Journal Article•
TL;DR: The optimal placement of capacitor (OCP) as to nullify the effects of inductive loading in radial distribution system is presented and compensation of reactive power is shown which results in voltage support, minimize power losses and increases annual benefits.
Abstract: Reactive power is thelatent soul of power system. Capacitor is a well-known reactive power resource and used for reactive power compensation in mainly transmission and distribution system. This paper presents the optimal placement of capacitor (OCP) as to nullify the effects of inductive loading in radial distribution system. For optimization technique Genetic Algorithm (GA) is used which is implemented in ETAP 7.0.0 Power Station software. Results such as voltage support, power lossesand annual benefits are analyzed. Computational results show compensation of reactive power which in turn results in voltage support, minimize power losses and increases annual benefits. The method is easier and time saving. General Terms: Voltage profile improvement in radial distribution system, capacitor placement, reactive power compensation.
6 citations
22 Jul 2012
TL;DR: In this paper, the authors present research work in distribution system voltage and var optimization in terms of specific objectives such as loss minimization and demand reduction, and show that load types play an essential role in determining the optimization solution.
Abstract: This paper presents research work in distribution system voltage and var optimization. For increased efficiency and voltage regulation, an increasing number of voltage and var control devices have been adopted by utilities. These devices usually work autonomously according to local conditions, and consequently the controller settings may not be optimized in terms of specific objectives such as loss minimization and demand reduction. To reach an optimal solution, these controllers need to work collectively within a coordinated framework considering system conditions. This paper reports on-going research in voltage and var optimization. Results considering different load type combinations are presented. It is shown that load types play an essential role in determining the optimization solution.
5 citations
References
More filters
TL;DR: In this article, the problem of capacitors placement on a radial distribution system is formulated and a solution algorithm is proposed, where the location, type, and size of the capacitors, voltage constraints, and load variations are considered.
Abstract: The problem of capacitor placement on a radial distribution system is formulated and a solution algorithm is proposed. The location, type, and size of capacitors, voltage constraints, and load variations are considered. The objective of capacitor placement is peak power and energy loss reduction, taking into account the cost of the capacitors. The problem is formulated as a mixed integer programming problem. The power flows in the system are explicitly represented, and the voltage constraints are incorporated. A solution method has been implemented that decomposes the problem into a master problem and a slave problem. The master problem is used to determine the location of the capacitors. The slave problem is used by the master problem to determine the type and size of the capacitors placed on the system. In solving the slave problem, and efficient phase I-phase II algorithm is used. >
1,832 citations
"Initial results in an approximate o..." refers methods in this paper
...Another sort of methods formulated this problem as a general mathematical optimal problem[3,4,5,6]....
[...]
TL;DR: In this paper, the Equal Area Criterion (EACC) was used to optimize the net savings associated with reduction of power and energy losses through shunt capacitor placement on primary distribution feeders.
Abstract: New generalized procedures are developed for optimizing the net savings associated with reduction of power and energy losses through shunt capacitor placement on primary distribution feeders. These procedures are applied to realistic problems to facilitate their immediate use by the electric utility distribution system designer. It is shown that a basic principle, called here "The Equal Area Criterion", offers significant computational and physical insight into numerous problems outside the bounds of studies previously reported and widely accepted in industry
377 citations
"Initial results in an approximate o..." refers methods in this paper
...Another sort of methods formulated this problem as a general mathematical optimal problem[3,4,5,6]....
[...]
TL;DR: In this article, a voltage-dependent methodology for shunt-capacitor compensation of primary distribution feeders is presented, where a generalized computer-based procedure is described for optimally sizing and placing any specified number of fixed shunt capacitors while accounting for voltage variation along the feeder.
Abstract: A new voltage-dependent methodology for shunt-capacitor compensation of primary distribution feeders is presented. A generalized computer- based procedure is described for optimally sizing and placing any specified number of fixed shunt capacitors while accounting for voltage variation along the feeder. The procedure is applied to a physically-existing feeder with known P, Q loads to yield results for capacity release exactly comparable to those from an optimal power flow. The superiority of the new methodology over existing methods is demonstrated.
182 citations
TL;DR: In this article, the authors developed an analytical method to determine the best capacitor locations, reactive compensation level, and yearly loss reductions under a wide range of annual reactive load conditions for use in distribution system design.
Abstract: This paper reports the development of an analytical method to determine the best capacitor locations, reactive compensation level, and yearly loss reductions under a wide range of annual reactive load conditions for use in distribution system design. The results show that, not only is more than 80 percent yearly loss reduction possible with non-switched capacitor banks, but also optimum reacttve-compensation level and maximum yearly loss reduction can be expressed in a simple mathematical equation.
115 citations
"Initial results in an approximate o..." refers methods in this paper
...Some of them used analytical search with numerous assumptions[1,2]....
[...]
01 Apr 1961-Transactions of The American Institute of Electrical Engineers. Part Iii: Power Apparatus and Systems
82 citations
"Initial results in an approximate o..." refers methods in this paper
...Some of them used analytical search with numerous assumptions[1,2]....
[...]