scholarly journals Generation capacity adequacy evaluation based on peak load consideration

2006 ◽  
Vol 24 (1) ◽  
pp. 38 ◽  
Author(s):  
R K Saket ◽  
R C Bansal ◽  
G Singh
Keyword(s):  
Peak Load ◽  
Reliability Evaluation ◽  
Generation System ◽  
Load Duration ◽  
Load Models ◽  
Load Duration Curve ◽  
Straight Line ◽  
Generating Capacity ◽  
Generation Capacity

This paper describes a new methodology based on peak load consideration for reliability evaluation of a generation system. The methodology has been developed using Simpson?s (1/3)rd rule for loss of load probability (LOLP) evaluation. Load models are considered as straight line and stepped load duration curve for reliability evaluation. The LOLP evaluation is based on peak load consideration. The probability of load exceeding the generating capacity has also been considered in LOLP evaluation.

Study the Influence of the Implementation of Demand Side Management on Generation System Reliability

2014 ◽  
Vol 1044-1045 ◽  
pp. 1789-1798
Author(s):  
Le Feng Cheng ◽  
Bai Xi Chen ◽  
Tao Yu
Keyword(s):  
System Reliability ◽  
Sequential Monte Carlo ◽  
Demand Side Management ◽  
Reliability Evaluation ◽  
Test System ◽  
Energy Utilization ◽  
Demand Side ◽  
Generation System ◽  
Improve Energy Efficiency ◽  
Generation Capacity

At present, the influence of implementing demand side management on generation system reliability was studied by more and more academics. Demand side management can improve energy efficiency and reduce the maximum load demand, which is equivalent to an indirect increase in power generation capacity of the system, thus can improve the reliability of generation system. This paper firstly introduced the reliability index system of generation system, then the reliability analysis model which includes generation capacity model and load model was respectively built, and then the non-sequential Monte Carlo simulation method applied in generation system reliability evaluation was analyzed. Secondly, adopted the simulation to quantify and set the IEEE reliability testing system RTS (Reliability Test System) as an example to analyze the effect of demand side management on generation system reliability evaluation, the analysis results show that the implementation of DSM can improve the energy utilization and reliability of generation system, thus the system can be more secure, economic and reliable to supply electric power for electricity users.

Method for Redesign of District Heating Networks within Transition from the 2nd to the 3rd Generation

2014 ◽  
Vol 657 ◽  
pp. 689-693
Author(s):  
Răzvan Corneliu Lefter ◽  
Daniela Popescu ◽  
Alexandrina Untăroiu
Keyword(s):  
District Heating ◽  
Design Stage ◽  
Heating Systems ◽  
Load Duration ◽  
Load Duration Curve ◽  
District Heating Systems ◽  
Consumption Rates ◽  
Heat Loads ◽  
Heating Networks

Important investmentsare made lately in the area of district heating, as a technology capable ofhelping countries to reach sustainability goals. In Romania, European fundswere spent for transition from the 2nd to the 3rdgeneration of district heating systems. The lack of appropriate monitoringsystems in old district heating systems makes optimisation nowadays very difficult,especially because nominal values used in the first design stage areoverestimated. Realistic nominal heat loads are necessary to make goodestimations of hydraulic parameters to be used for redesign. This studyproposes a method that uses the heat load duration curve theory to identify theappropriate nominal heat loads to be used for redesign. Comparison betweenresults obtained by applying the nominal heat loads of each consumer, as theywere established in the first design stage, and the ones identified by theproposed method are analyzed in a case study. The results show that errors arein the +/- 3% band, between the metered heat consumption rates and the proposedrates. The new method can be used for the sizing of pumps and district heatingnetworks after retrofit, in order to get better adjustments of the circulationpumps and increase of the energy efficiency.

scholarly journals Expansion Planning of Electricity Generating System Using the VALORAGUA and WASP-IV Models in Nepal

2016 ◽  
Vol 19 ◽  
pp. 45-51 ◽  
Author(s):  
Jayandra Prasad Shrestha ◽  
Namrata Tusuju Shrestha
Keyword(s):  
Early Stage ◽  
Generation System ◽  
Expansion Planning ◽  
Long Run ◽  
Hydropower Plants ◽  
Expansion Plan ◽  
National Power ◽  
Generation Capacity ◽  
And Storage ◽  
Generating System

This paper presents a framework for a possible expansion plan of Nepal’s electricity generation system using VALORAGUA and Wien Automatic System Planning (WASP-IV) models as examples. Given that Nepal seeks to add several hydropower plants to the Integrated National Power System (INPS) in the next few years, this type of planning is crucial. To explore potential expansion plans, the 48 hydropower plants (20 of which are currently operating) within 18 hydro networks and two diesel plants are included, and different options such as the possibility of export, seasonal variations in hydrology, and projected growth rates in gross domestic product are considered. The results illustrate the long run marginal cost (LRMC) and loss of load probability (LoLP) through 2030 in Nepal. It is found that LRMC is 3.50 Nepali Rupees per kilowatt hour at 4.1% of average LoLP. While scrutinizing the results, it is found that LoLP is higher in early stage of projections due to generation capacity limitations from 2014 to 2016. However, by the end of 2017, the LRMC and LoLP begin to decrease significantly. On this premise, the model suggests to introduce large storage plants for hydropower generation and export of that excess energy. Furthermore, a proper implementation of proposed peaking and storage plants to meet rising demand can offset the need to obtain electricity through more expensive and less environmentally-friendly means such as thermal/diesel plants.HYDRO Nepal JournalJournal of Water, Energy and EnvironmentIssue: 19Page: 45-51

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