scholarly journals ANALISIS SETTING RELE OGS SEBAGAI SISTEM PENGAMAN TRANSFORMATOR 3 UNTUK MENJAGA KONTINYUITAS ALIRAN DAYA DI GARDU INDUK PESANGGARAN

2018 ◽  
Vol 4 (2) ◽  
pp. 145
Author(s):  
I Wayan Alit Wigunawan ◽  
I Gede Dyana Arjana ◽  
Cok Gede Indra Partha
Keyword(s):  
Power Generation ◽  
Power Supply ◽  
Power Plants ◽  
Setting Time ◽  
Transmission System ◽  
Safety System ◽  
Working Time ◽  
Phase 2 ◽  
Work Time ◽  
Current Setting

Transformer 3 of Pesanggaran Substation obtains additional power plants with a maximum power of 60 MW. Power generation is used to supply the load of feeders in Substation of Pesanggaran and also channeled to 150 kV transmission system at Substation of Pesanggaran through Transformator 3 to Substation of Nusa Dua to assist power supply at Nusa Dua Substation. If there is a feeders interruption in the Substation of Pesanggaran which causes the load of feeders to be disconnected, then the power from the generator that is flowed to the 150 kV system increases. Thus the Transformer 3 works heavier, resulting in the current and temperature of the transformer also increased. Increased temperatures in the transformer for long periods can result in damage and reduced lifetime of the transformer. From the problems then calculation of current and working time OGS and OCR as the Transformer 3 safety system. The result of calculation of OGS setting of phase1 is 1600 A with setting work time of 2 seconds, phase 2 is 1700 A with setting working time of 1,5 seconds and stage 3 of 1800 A with setting work time of 1 second. The OGS relay characteristic is definite. For OCR at 150 kV side, the current setting is 277 A and setting time is 1.36 seconds, while OCR setting at 20 kV side is obtained by setting current of 2078.4 A and setting time of 1.18 seconds with OCR Relay characteristic used is inverse.

The Integrated Evaluation Index of Energy-Saving and Emission Reduction Generation Dispatching

2011 ◽  
Vol 382 ◽  
pp. 56-59
Author(s):  
Yong Hua Li ◽  
Jun Wang ◽  
Wei Ping Yan
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Power Supply ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Evaluation System ◽  
Power Plants ◽  
Consumption Rate ◽  
Coal Consumption ◽  
Reduction Effect

In China, coal combustion to generate electric power is the primary method, the energy-saving and emission reduction is the urgent task. At present, the energy-saving dispatching trial method in some area evaluates energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t reflect the energy-saving and emission reduction effect of coal combustion power plant overall. For example, the same coal combustion unit, the coal consumption rate is difference when desulfuration system is operating or not; the coal consumption rate of the unit with SCR will be increased; the coal consumption rate of the air-cooled unit is higher than water-cooled unit; etc.. This paper considers synthetically coal consumption rate, pollution emission, water resource wastage, etc., establishes a integrated evaluation system, adopts factor analysis method, gets the integrated evaluation system and index of energy-saving and emission reduction of coal combustion power generation, evaluates energy-saving and emission reduction effect of 5 power plants reasonable. The results show that the index can reflect the energy-saving and emission reduction level of coal combustion power generation.

Captive Power Generation : What are the Economics ?

1987 ◽  
Vol 12 (2) ◽  
pp. 47-56 ◽  
Author(s):  
V Ranganathan ◽  
Damodar Mall
Keyword(s):  
Power Generation ◽  
Power Supply ◽  
Power Plants ◽  
Power Cost ◽  
Reliable Power Supply ◽  
Power Costs

Galloping demand for power and mounting constraints in its generation have forced electricity boards all over the country to impose power cuts. User industries have been forced to go for captive power plants to tide over the situation. In this article, V Ranganathan and Damodar Mall compare captive power and grid power costs in Karnataka. At the observed low utilization of between 6 and 20 per cent, captive power cost is Rs 1.95 while grid power cost is only 31 paise per KWH. The authors argue that the user industries should pursue the options of cooperative generation of power or become a financing partner with the electricity boards for assured and reliable power supply.

scholarly journals FORMATION OF THE INFORMATIONAL SUPPORTING FOR MANAGEMENT OF POWER GENERATION AND DELIVERY ON THE COGENERATION POWER PLANT IN THE LIBERALIZED ELECTRICITY MARKET

2021 ◽  
Vol 2021 (2) ◽  
pp. 67-76
Author(s):  
O. Kotsar ◽  
◽  
I. Rasko ◽  
◽  
◽  
...  
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Energy Management ◽  
Power Supply ◽  
Electricity Market ◽  
Power Plants ◽  
Automated System ◽  
Demand Side ◽  
Informational Support ◽  
Successful Solution

The liberalization of the electricity market aims at the most complete repletion of consumer needs for electricity and quality power supply, which requires the adaptive management of an energy using both by demand side and by the electricity producers – power plants. The successful solution of this task provides, in particular, for using the effective methods and reliable means for the formation of the informational support for the tasks of managing the power generation and delivery on the power plants in order to ensure conforming in real time the market power bids to current demand side asks. The article proposes a methodology, describes the implemented tools and analyzes the experience of managing the power generation and delivery on the cogeneration power plant based on the information which formed by the automated system for control, metering and energy management in the conditions of functioning of the liberalized electricity market of Ukraine. References 10, figures 5.

Analysis of the influence of renewable energy sources on thermal energy generation for isolated power systems

2019 ◽  
pp. 0309524X1987403 ◽  
Author(s):  
Aleksey A Zhidkov ◽  
Andrey A Achitaev ◽  
Mikhail V Kashurnikov
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Power Systems ◽  
Power Supply ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Renewable Power ◽  
Renewable Power Generation ◽  
Autonomous Power Systems

The urgency of developing renewable power generation in Russia is associated with the presence of a large number of regions with a low degree of electrification. More than two-thirds of the territory of Russia is located in the area of decentralized power supply, where the main source of energy is imported diesel fuel or associated gas from local fields. At present, one of the directions for the development of renewable power generation in Russia is the implementation of a hybrid power supply system for autonomous power systems of remote regions. However, along with the possibility of using renewable energy sources, it is important for such regions to generate heat from co-generation of diesel power plants, since there is an urgent problem of heat supply for remote regions, especially located in the Far North of Russia. This article presents an analysis of the influence of using renewable energy sources in autonomous power systems on co-generation of diesel power plants.

scholarly journals The Potential Role of Power-to-Gas Technology Connected to Photovoltaic Power Plants in the Visegrad Countries—A Case Study

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6408
Author(s):  
Gábor Pintér
Keyword(s):  
Power Generation ◽  
Power Plants ◽  
Poor Quality ◽  
Transmission System ◽  
Methane Content ◽  
The European Union ◽  
Power Capacity ◽  
Photovoltaic Power ◽  
Power To Gas ◽  
Visegrád Countries

With the spread of the use of renewable sources of energy, weather-dependent solar energy is also coming more and more to the fore. The quantity of generated electric power changes proportionally to the intensity of solar radiation. Thus, a cloudy day, for example, greatly reduces the amount of electricity produced from this energy source. In the countries of the European Union solar power plants are obligated to prepare power generation forecasts broken down to 15- or 60-min intervals. The interest of the regionally responsible transmission system operators is to be provided with forecasts with the least possible deviation from the actual figures. This paper examines the Visegrad countries’ intraday photovoltaic forecasts and their deviations from real power generation based on the photovoltaic power capacity monitored by the transmission system operators in each country. The novelty of this study lies in the fact that, in the context of monitored PV capacities in the Visegrad countries, it examines the regulation capacities needed for keeping the forecasts. After comparing the needs for positive and negative regulation, the author made deductions regarding storage possibilities complementing electrochemical regulation, based on the balance. The paper sought answers concerning the technologies required for the balancing of PV power plants in the examined countries. It was established that, as a result of photovoltaic power capacity regulation, among the four Visegrad countries, only the Hungarian transmission system operator has negative required power regulation, which could be utilized in power-to-gas plants. This power could be used to produce approximately 2.1 million Nm3 biomethane with a 98% methane content, which could be used to improve approximately 4 million Nm3 biogas of poor quality by enriching it (minimum 60% methane content), so that it can be utilized. The above process could enhance the viability of 4–6 low-methane agricultural biogas plants in Hungary.

scholarly journals Optimization of the Regional Spatial Distribution of Wind Power Plants to Minimize the Variability of Wind Energy Input into Power Supply Systems

2008 ◽  
Vol 47 (12) ◽  
pp. 3099-3116 ◽  
Author(s):  
Federico Cassola ◽  
Massimiliano Burlando ◽  
Marta Antonelli ◽  
Corrado F. Ratto
Keyword(s):  
Power Generation ◽  
Spatial Distribution ◽  
Power System ◽  
Wind Energy ◽  
Wind Power ◽  
Power Supply ◽  
Energy Input ◽  
Power Plants ◽  
Wind Power Plants ◽  
Wind Energy Input

Abstract In contrast to conventional power generation, wind energy is not a controllable resource because of its stochastic nature, and the cumulative energy input of several wind power plants into the electric grid may cause undesired fluctuations in the power system. To mitigate this effect, the authors propose a procedure to calculate the optimal allocation of wind power plants over an extended territory to obtain a low temporal variability without penalizing too much the overall wind energy input into the power system. The procedure has been tested over Corsica (France), the fourth largest island in the Mediterranean Basin. The regional power supply system of Corsica could be sensitive to large fluctuations in power generation like wind power swings caused by the wind intermittency. The proposed methodology is based on the analysis of wind measurements from 10 anemometric stations located along the shoreline of the island, where most of the population resides, in a reasonably even distribution. First the territory of Corsica has been preliminarily subdivided into three anemological regions through a cluster analysis of the wind data, and the optimal spatial distribution of wind power plants among these regions has been calculated. Subsequently, the 10 areas around each station have been considered independent anemological regions, and the procedure to calculate the optimal distribution of wind power plants has been further refined to evaluate the improvements related to this more resolved spatial scale of analysis.

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