The Experts below are selected from a list of 186 Experts worldwide ranked by ideXlab platform

Ricardo Ruther - One of the best experts on this subject based on the ideXlab platform.

  • the impacts of solar water heating in low income households on the Distribution Utility s active reactive and apparent power demands
    Solar Energy, 2011
    Co-Authors: Helena Flavia Naspolini, Ricardo Ruther
    Abstract:

    Abstract In Brazilian low-income households, water-heating requirements are typically met by electrical showerheads. On average, 73.1% of all residential units in the country are equipped with these resistance-heating devices, with nominal powers ranging from 3 to 8 kW. This situation imposes a considerable burden on the electricity Utility companies, since electrical showerheads typically represent the highest load but the lowest utilization (load factor) in a residential consumer unit. Furthermore, typical utilization times coincide with, and contribute to, the electrical power demand peaks in Brazil, rendering these low-cost, high-power electrical devices a high-cost consumer for the electrical system to cater for. For low-income residential consumers, electricity tariffs are subsidized, and utilities must therefore make a considerable investment in infrastructure for a limited return. In this paper we analyze the impacts of solar water heating in low-income households on the Distribution Utility active, reactive and apparent power demands. We have monitored a statistically representative group of low-income residences equipped with a compact domestic solar water heater in Florianopolis – Brazil for 1 year. We show that in comparison with identical residential units using electrical showerheads, with the adoption of solar water heating the reductions in the active, reactive and apparent power demands on the Distribution Utility were 49%, 29% and 49% respectively.

  • The impacts of solar water heating in low-income households on the Distribution Utility’s active, reactive and apparent power demands
    Solar Energy, 2011
    Co-Authors: Helena Flavia Naspolini, Ricardo Ruther
    Abstract:

    Abstract In Brazilian low-income households, water-heating requirements are typically met by electrical showerheads. On average, 73.1% of all residential units in the country are equipped with these resistance-heating devices, with nominal powers ranging from 3 to 8 kW. This situation imposes a considerable burden on the electricity Utility companies, since electrical showerheads typically represent the highest load but the lowest utilization (load factor) in a residential consumer unit. Furthermore, typical utilization times coincide with, and contribute to, the electrical power demand peaks in Brazil, rendering these low-cost, high-power electrical devices a high-cost consumer for the electrical system to cater for. For low-income residential consumers, electricity tariffs are subsidized, and utilities must therefore make a considerable investment in infrastructure for a limited return. In this paper we analyze the impacts of solar water heating in low-income households on the Distribution Utility active, reactive and apparent power demands. We have monitored a statistically representative group of low-income residences equipped with a compact domestic solar water heater in Florianopolis – Brazil for 1 year. We show that in comparison with identical residential units using electrical showerheads, with the adoption of solar water heating the reductions in the active, reactive and apparent power demands on the Distribution Utility were 49%, 29% and 49% respectively.

Helena Flavia Naspolini - One of the best experts on this subject based on the ideXlab platform.

  • the impacts of solar water heating in low income households on the Distribution Utility s active reactive and apparent power demands
    Solar Energy, 2011
    Co-Authors: Helena Flavia Naspolini, Ricardo Ruther
    Abstract:

    Abstract In Brazilian low-income households, water-heating requirements are typically met by electrical showerheads. On average, 73.1% of all residential units in the country are equipped with these resistance-heating devices, with nominal powers ranging from 3 to 8 kW. This situation imposes a considerable burden on the electricity Utility companies, since electrical showerheads typically represent the highest load but the lowest utilization (load factor) in a residential consumer unit. Furthermore, typical utilization times coincide with, and contribute to, the electrical power demand peaks in Brazil, rendering these low-cost, high-power electrical devices a high-cost consumer for the electrical system to cater for. For low-income residential consumers, electricity tariffs are subsidized, and utilities must therefore make a considerable investment in infrastructure for a limited return. In this paper we analyze the impacts of solar water heating in low-income households on the Distribution Utility active, reactive and apparent power demands. We have monitored a statistically representative group of low-income residences equipped with a compact domestic solar water heater in Florianopolis – Brazil for 1 year. We show that in comparison with identical residential units using electrical showerheads, with the adoption of solar water heating the reductions in the active, reactive and apparent power demands on the Distribution Utility were 49%, 29% and 49% respectively.

  • The impacts of solar water heating in low-income households on the Distribution Utility’s active, reactive and apparent power demands
    Solar Energy, 2011
    Co-Authors: Helena Flavia Naspolini, Ricardo Ruther
    Abstract:

    Abstract In Brazilian low-income households, water-heating requirements are typically met by electrical showerheads. On average, 73.1% of all residential units in the country are equipped with these resistance-heating devices, with nominal powers ranging from 3 to 8 kW. This situation imposes a considerable burden on the electricity Utility companies, since electrical showerheads typically represent the highest load but the lowest utilization (load factor) in a residential consumer unit. Furthermore, typical utilization times coincide with, and contribute to, the electrical power demand peaks in Brazil, rendering these low-cost, high-power electrical devices a high-cost consumer for the electrical system to cater for. For low-income residential consumers, electricity tariffs are subsidized, and utilities must therefore make a considerable investment in infrastructure for a limited return. In this paper we analyze the impacts of solar water heating in low-income households on the Distribution Utility active, reactive and apparent power demands. We have monitored a statistically representative group of low-income residences equipped with a compact domestic solar water heater in Florianopolis – Brazil for 1 year. We show that in comparison with identical residential units using electrical showerheads, with the adoption of solar water heating the reductions in the active, reactive and apparent power demands on the Distribution Utility were 49%, 29% and 49% respectively.

Vinay Sharma - One of the best experts on this subject based on the ideXlab platform.

  • determination of maximum pv solar system connectivity in a Utility Distribution feeder
    IEEE PES Transmission and Distribution Conference and Exposition, 2012
    Co-Authors: Rajiv K Varma, Iurie Axente, Vinay Sharma, Jon Berge, Ken Walsh
    Abstract:

    This paper presents a study for determining the maximum amount of PV solar generation that can be connected in a 27.6 kV feeder of a Distribution Utility - London Hydro. Various factors such as steady state voltage rise, Temporary Over Voltage (TOV), short circuit current and harmonic contributions, that could potentially constrain DG connectivity are investigated. Load flow studies with PSS/E and electromagnetic transient simulation studies with EMTDC/PSCAD software are utilized for performing the above investigations. It is shown that harmonic amplification due to network resonance could potentially be the limiting factor for PV solar connectivity in this Distribution feeder. This paper also makes a case that the conventional Connection Impact Assessment (CIA) studies for DG connections need to be made broader to include such harmonic aspects.

  • novel application of a pv solar plant as statcom pv statcom during night and day in a Distribution Utility network part 2
    IEEE PES Transmission and Distribution Conference and Exposition, 2012
    Co-Authors: Rajiv K Varma, Ehsan M Siavashi, Byomakesh Das, Vinay Sharma
    Abstract:

    This paper presents a comprehensive testing, validation and installation plan for a new technology which utilizes PV solar farm as a STATCOM both during nighttime and daytime. This technology is termed PV-STATCOM. It will be utilized in the night for power factor correction and voltage control at the terminals of an induction motor operating at poor power factor. During daytime, the same objectives will be accomplished together with production of real power from solar insolation, by utilizing the inverter capacity remaining after real power generation. The local Distribution company London Hydro is implementing this new technology, for the first time in Canada, on a 10 kW solar system to be installed on the rooftop of their headquarters building in Spring 2012. The proposed new control on PV solar system will help increase the utilization of the PV solar system, improve overall electrical system performance and provide a potential of additional revenue earning for solar system for providing the above services, both during night and day.

  • novel application of a pv solar plant as statcom during night and day in a Distribution Utility network
    IEEE PES Power Systems Conference and Exposition, 2011
    Co-Authors: Rajiv K Varma, Shriram S Rangarajan, Iurie Axente, Vinay Sharma
    Abstract:

    PV solar farms produce power during the day and are completely idle in the nights. This paper presents a novel utilization of a PV solar plant as STATCOM in the night for load reactive power compensation and voltage control. This STATCOM functionality will also be available to a substantial degree during the daytime with the inverter capacity remaining after real power production. The local Distribution company London Hydro is implementing this new technology, for the first time in Canada, on a 10 kW solar system to be installed on the rooftop of their headquarters building. The PV solar plant inverter controller will be designed, developed and tested in the university Lab and will then be installed in field by Spring 2011. This paper presents the EMTDC/PSCAD simulation studies of the performance of the 10 kW PV solar plant as a STATCOM. The benefits of employing such a new control of the PV solar system as a Flexible AC Transmission System (FACTS) device are presented.

V.p. Jagathyraj - One of the best experts on this subject based on the ideXlab platform.

  • A practical approach to assessment of the base power contracts and peak power contracts for a Distribution Utility
    International Journal of Electrical Power & Energy Systems, 2016
    Co-Authors: S.r. Anand, C.a. Babu, V.p. Jagathyraj
    Abstract:

    Abstract Mix of long term and short term contracts are essential in the portfolio optimisation of the Distribution Utility for meeting the unrestricted demand of the consumers at the minimum cost. Opening up of power market and the increasing open access transactions in India has made it essential to the Distribution utilities to have optimum operation strategy for keeping the competitiveness in the industry. Further, the Distribution utilities in India are also mandated with universal supply obligation, due to which the meticulous planning in long term has become more significant for their survival itself. Another aspect to be considered is the social impact on the cost optimisation of electricity procurement as the electricity consumption has direct links to the industrialisation and living comfort of the people. The gestation period of conventional generators is more than five years. Transmission line construction also requires a time span of 3 to 4 years from concept to completion. The influx of renewable energy characterised by the short gestation period, poor predictability and high degree of forecast error are also to be considered. Hence the portfolio optimisation problem becomes more of a management decision than a technical solution of constraint based mathematical modelling. The basic requirement for application in the electricity industry is that the method shall be simple and robust. After considering the several options available the authors have identified modified load profile forecast as the most suitable means for long range forecast of demand. The model relies on the suppression of local peaks when the demand is unitised and then deriving the cardinal points on a linearised load curve from the energy forecast. The method was applied with the actual demand of Kerala and the results are found to be good.

Rajiv K Varma - One of the best experts on this subject based on the ideXlab platform.

  • determination of maximum pv solar system connectivity in a Utility Distribution feeder
    IEEE PES Transmission and Distribution Conference and Exposition, 2012
    Co-Authors: Rajiv K Varma, Iurie Axente, Vinay Sharma, Jon Berge, Ken Walsh
    Abstract:

    This paper presents a study for determining the maximum amount of PV solar generation that can be connected in a 27.6 kV feeder of a Distribution Utility - London Hydro. Various factors such as steady state voltage rise, Temporary Over Voltage (TOV), short circuit current and harmonic contributions, that could potentially constrain DG connectivity are investigated. Load flow studies with PSS/E and electromagnetic transient simulation studies with EMTDC/PSCAD software are utilized for performing the above investigations. It is shown that harmonic amplification due to network resonance could potentially be the limiting factor for PV solar connectivity in this Distribution feeder. This paper also makes a case that the conventional Connection Impact Assessment (CIA) studies for DG connections need to be made broader to include such harmonic aspects.

  • novel application of a pv solar plant as statcom pv statcom during night and day in a Distribution Utility network part 2
    IEEE PES Transmission and Distribution Conference and Exposition, 2012
    Co-Authors: Rajiv K Varma, Ehsan M Siavashi, Byomakesh Das, Vinay Sharma
    Abstract:

    This paper presents a comprehensive testing, validation and installation plan for a new technology which utilizes PV solar farm as a STATCOM both during nighttime and daytime. This technology is termed PV-STATCOM. It will be utilized in the night for power factor correction and voltage control at the terminals of an induction motor operating at poor power factor. During daytime, the same objectives will be accomplished together with production of real power from solar insolation, by utilizing the inverter capacity remaining after real power generation. The local Distribution company London Hydro is implementing this new technology, for the first time in Canada, on a 10 kW solar system to be installed on the rooftop of their headquarters building in Spring 2012. The proposed new control on PV solar system will help increase the utilization of the PV solar system, improve overall electrical system performance and provide a potential of additional revenue earning for solar system for providing the above services, both during night and day.

  • novel application of a pv solar plant as statcom during night and day in a Distribution Utility network
    IEEE PES Power Systems Conference and Exposition, 2011
    Co-Authors: Rajiv K Varma, Shriram S Rangarajan, Iurie Axente, Vinay Sharma
    Abstract:

    PV solar farms produce power during the day and are completely idle in the nights. This paper presents a novel utilization of a PV solar plant as STATCOM in the night for load reactive power compensation and voltage control. This STATCOM functionality will also be available to a substantial degree during the daytime with the inverter capacity remaining after real power production. The local Distribution company London Hydro is implementing this new technology, for the first time in Canada, on a 10 kW solar system to be installed on the rooftop of their headquarters building. The PV solar plant inverter controller will be designed, developed and tested in the university Lab and will then be installed in field by Spring 2011. This paper presents the EMTDC/PSCAD simulation studies of the performance of the 10 kW PV solar plant as a STATCOM. The benefits of employing such a new control of the PV solar system as a Flexible AC Transmission System (FACTS) device are presented.