Introducing Custom Power
ABSTRACT Changes in customers' needs require improvements in the reliability and quality of the electricity supply. This paper describes how the concept of custom power is now becoming familiar. The term describes the value-added power that electric utilities and other service providers will offer their customers in the future. The improved level of reliability of this power, in terms of reduced interruptions and less variation, will stem from an integrated solution to present problems, of which a prominent feature will be the application of power electronic controllers to utility distribution systems and/or at the supply end of many industrial and commercial customers and industrial parks.< >
- SourceAvailable from: Guilherme Goncalves Sotelo
- "The current energy scenario in Brazil is calling for a global effort towards a more efficient use of electrical energy, as well as for a global improvement in the quality of its delivery. However, as budgets are limited, an acceptable alternative is the offering of different levels of supply quality, according to the concept of Custom Power, proposed by Hingorani in . For the practical implementation of this concept, several types of equipment can be used, as described in . "
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- "Most times the consequence of using these machines and some of the residential loads results in distorting the power quality, high losses and generates harmonics, voltage swells and flickering. Such devices that causes these distortions include arching devices, induction motor starting, Information and Communications Technology (ICT) equipment/facilities, electromagnetic radiations and cables, embedded generation    .Typical Nigeria distribution network has the following characteristics as at the time of carrying out this research and they include: 1) Consistent overloading of the distribution networks (distribution lines and transformers) 2) Prolonged abandonment of the distribution network 3) Lack of upgrade "
ABSTRACT: Abstract – Nigeria power distribution network is faced with enormous challenges such as consistent overloading of distribution lines and transformers, power outages due to various kinds of faults such as planned, unplanned and forced, high distribution line losses, poor power quality among others. The attempt by Federal Government of Nigeria (FGN) to solve power system challenges has resulted into the creation of eleven (11) distribution companies (Discos). These include Ibadan, Kaduna, Port Harcourt, Jos,Benin, Eko, Ikeja, Kano, Yola, Abuja and Enugu. However the FGN did not consider the use of custom power devices in solving some of these problems inherent in the distribution networks. These devices are power electronic based with fast switching mechanism and has found vast application in distribution networks in developed countries. This paper considered the prospect of Custom Power (CP) devices such as Solid State Transfer Switch (SSTS), Dynamic Static Compensator (D-STATCOM), Dynamic Voltage Restorer (DVR) and Unified Power Quality Controller (UPQC) in improving the efficiency of Nigeria distribution network.
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- "These nonlinear loads of power electronic devices create major power problem in the distribution system which tends to power quality problem. The various power electronic based devices called custom power devices used to mitigate the power quality problems have been proposed in the literature survey  . Among these, DSTATCOM is the most effective device  . "
ABSTRACT: In this paper, a three-phase three-wire Distribution STATic COMpensator (DSTATCOM) which is fed by Photovoltaic (PV) array or battery operated DC-DC boost converter is proposed for reactive power compensation, source current harmonic reduction and load compensation in the distribution system. The proposed DSTATCOM consists of a three-leg Voltage Source Converter (VSC) with a dc bus capacitor. The PV array or battery operated boost converter is proposed to maintain the dc link voltage of the dc bus capacitor for continuous compensation for the load. This paper presents to evaluate the performance comparison of two control strategies for extracting the reference currents to control the proposed DSTATCOM. The two control methods are Synchronous Reference Frame (SRF) theory and IcosF algorithm. The switching of VSC will occur by comparing the source current with the reference current using Hysteresis based Pulse Width Modulation (PWM) current controller. The performance of the DSTATCOM is validated using MATLAB software with its simulink and Power System Blockset (PSB) toolboxes. The simulation results for the two control methods are compared to validate the superior performance of the IcosF algorithm. By comparing, the source current THD is reduced to acceptable level 5% of IEEE-519-1992 in IcosF method.Tamkang Journal of Science and Engineering 06/2013; 16(1).