scholarly journals Transmission Pricing Using Accounting Rate of Return and MW-km Methods

2019 ◽  
Vol 8 (9) ◽  
pp. 1462-1465
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
System Simulation ◽  
Technical Information ◽  
Rate Of Return ◽  
Transmission Pricing ◽  
Transmission Cost ◽  
Simulation Results ◽  
The Cost ◽  
Accounting Rate

This paper presents a realistic and transparent approach to determine transmission cost for the transmission lines of a power system network by allocating the costs to all the participating generating units and load demands. There is a requirement for developing an appropriate transmission pricing mechanism which can give economic and technical information to the participants of the market, i.e., customers, generation and transmission companies. This paper proposes a methodology to allocate the cost of transmission in power system network. In this paper, accounting rate of return (ARR) and MW-km approaches have been used to evaluate the cost of transmission in the system. Simulation results are presented on standard IEEE 14 bus system.

scholarly journals Risk-Based Active Power Redispatch Optimization

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 716
Author(s):  
Karol Wawrzyniak ◽  
Endika Urresti Padrón ◽  
Wojciech Jaworski ◽  
Roman Korab
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Unit Commitment ◽  
Load Shedding ◽  
Security Assessment ◽  
Reference Case ◽  
Dynamic Security Assessment ◽  
System Operator ◽  
Remedial Actions ◽  
The Cost

Risk-based redispatch optimization is proposed as a methodology to support the Transmission System Operator (TSO) with preventive remedial actions obtained by extending the security-constrained unit commitment/economic dispatch with constraints resulting from the risk assessed for the power system. Although being heuristic, the methodology is based on comprehensive dynamic security assessment as time-domain simulations are used, allowing to express the degree of all types of instabilities, e.g., caused by contingencies, in monetary terms. Therefore, the risk is assessed as the expected value of the cost incurred by the TSO. Such an approach forms a new pathway to including risk in planning procedures already used by TSOs. Results obtained for the IEEE39 dynamic power system, with costs assigned to load shedding and generator tripping due to single transmission lines short-circuits, are shown as a reference case.

Study on the Identification of Lightning Over-Voltage Based on ATP-EMTP

2014 ◽  
Vol 672-674 ◽  
pp. 799-802
Author(s):  
Xiao Gang Li ◽  
Li Xue Li ◽  
Yi Hui Zheng ◽  
Xin Wang ◽  
Jian You Yu ◽  
...  
Keyword(s):  
Power System ◽  
Transmission Line ◽  
Transient Process ◽  
Transmission Lines ◽  
Weak Link ◽  
Simulation Models ◽  
Transmission Line Model ◽  
Lightning Stroke ◽  
Line Model ◽  
Simulation Results

Lightning overvoltage often leads to transmission lines trip, which is the weak link of power system. In this paper, 110-kV transmission line model is studied on the basis of the EMTP software. Several simulation models are established for back flashover lightning, induced lightning, shield failure. The transient process of lightning stroke is studied. According to the contrast of simulation results of three kinds of lightning, a set of discriminant basis to distinguish lightning on transmission line is put forward.

scholarly journals Risk-based Active Power Redispatch Optimization

2019 ◽  
Author(s):  
Karol Wawrzyniak ◽  
Endika Urresti Padrón ◽  
Wojciech Jaworski ◽  
Roman Korab
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Unit Commitment ◽  
Load Shedding ◽  
Security Assessment ◽  
Reference Case ◽  
Dynamic Security Assessment ◽  
System Operator ◽  
Remedial Actions ◽  
The Cost

Risk-based redispatch optimization is proposed as a methodology to support the Transmission System Operator (TSO) with preventive remedial actions obtained by extending the security constrained unit commitment/economic dispatch with constraints resulting from the risk assessed for the power system. Although being heuristic, the methodology is based on comprehensive dynamic security assessment as time-domain simulations are used, allowing to express the degree of all types of instabilities, e.g., caused by contingencies, in monetary terms. Therefore, the risk is assessed as the expected value of the cost incurred by the TSO. Such approach forms a new pathway to including risk in planning procedures already used by TSOs. Results obtained for the IEEE39 dynamic power system, with costs assigned to load shedding and generator tripping due to single transmission lines short-circuits, are shown as a reference case.

Transmission Pricing Practices: A Case Study

2017 ◽  
Vol 13 (1) ◽  
pp. 1-9
Author(s):  
N. Garg ◽  
D. Palwalia ◽  
Harish Sharma
Keyword(s):  
Power System ◽  
Power Market ◽  
Test System ◽  
Postage Stamp ◽  
Transmission Pricing ◽  
The North ◽  
Transmission Cost ◽  
Power System Market

This paper presents a case study on transmission pricing practices. Now a days, restructuring of the power system market through deregulation is gaining attention as technical and economical benefits at generator and user. In India, after the Electricity Act 2003, restructuring has been introduced in the Indian power system market. Researchers are continuously working towards improvement of deregulation based on restructuring to improve transmission pricing practices and calculations in a better way. Therefore, this paper presents an overview of MWMile and postage stamp methods to estimate the transmission cost. Further, the North Indian practical power system of 37 bus test system has been analyzed by reverse, absolute and dominant Mw-Mile methods. The results obtained to be expected for deregulated power market.

Magnesium Hydride Slurry — A Better Answer to Hydrogen Storage

2014 ◽  
Author(s):  
Andrew W. McClaine ◽  
Kenneth Brown ◽  
David D. G. Bowen
Keyword(s):  
Power System ◽  
Hydrogen Storage ◽  
Wind Power ◽  
Magnesium Hydride ◽  
Rate Of Return ◽  
Internal Rate Of Return ◽  
Storage Medium ◽  
Wind Power System ◽  
And Performance ◽  
The Cost

Hydrogen has many properties that make it an attractive energy storage medium for a sustainable future. But hydrogen is also difficult to store safely and cheaply. By storing hydrogen in an oil-based slurry with powdered magnesium hydride, cheap and safe hydrogen storage can be realized. This paper describes the characteristics and benefits of cycling hydrogen in and out of magnesium hydride slurry. Based on our experience with magnesium hydride slurry, we have performed a study to evaluate the cost effectiveness of applying bulk hydrogen storage, using magnesium hydride slurry, in a baseload wind power system that we will also discuss. This study concludes that a 150 MW baseload wind power system would produce an Internal Rate of Return (IRR) of 10% with an electric price of $0.088/kWh. The costs and performance characteristics of this power plant are described.

Stochastic Assessment of Voltage Sag Considering the Time Characteristic of Protection System

2013 ◽  
Vol 380-384 ◽  
pp. 3160-3165
Author(s):  
Li Pin Chen ◽  
Xian Yong Xiao ◽  
Yu Tao Qiu ◽  
Qian Xiong
Keyword(s):  
Power System ◽  
System Simulation ◽  
Test System ◽  
Time Characteristic ◽  
Assessment Model ◽  
Protection System ◽  
Voltage Sag ◽  
Traditional Assessment ◽  
Clearing Time ◽  
Simulation Results

When fault occurs in power system, the duration of voltage sag is determined by the fault clearing time of the protection system. In order to describe the duration of voltage sag more accurately, the time characteristic of protection system is considered for stochastic assessment of voltage sag. Based on the traditional assessment model, the mapping relationship between the time characteristic of protection system and voltage sag frequency is established using fault positions method. The proposed method is applied to the IEEE-30 bus test system, simulation results show that the time characteristic of protection system has an obvious influence on the duration of voltage sag, and very serious errors will be produced if the time characteristic of protection system is ignored. The proposed method is simple, adaptive and practical, and it is of academic value and practical foreground.

Comparison of classic and optimization approach to active power filters sizing and placement

2014 ◽  
Vol 33 (6) ◽  
pp. 1877-1890 ◽  
Author(s):  
Michal Lewandowski ◽  
Janusz Walczak
Keyword(s):  
Power System ◽  
Optimization Method ◽  
Active Power ◽  
Harmonic Compensation ◽  
Content Type ◽  
Active Power Filters ◽  
Power Filters ◽  
Classic Approach ◽  
Simulation Results ◽  
The Cost

Purpose – In most applications the active power filters (APFs) are used to reduce harmonic distortion of a nonlinear load which is located near the APF installation point. This classic approach allows to reduce the distortion introduced to the power system but do not guarantee that the cost of the APFs installation is optimal. The purpose of this paper is to compare the classic approach to harmonic compensation with an optimization method of sizing and placement of the APFs in an existing distributed power network. Design/methodology/approach – An exemplary real-life power system with distributed nonlinear loads was modeled using PCFLO power analysis software. Next, Matlab was used to implement the classic method and the optimization algorithm. Between Matlab and PCFLO a specially written Java middleware was used to provide a seamless workflow integration. Findings – It was shown that the presented optimization method may lead to superior results in comparison with the classic approach. Simulation results clearly showed that the APFs installation cost can be significantly reduced when the optimization algorithm is used. Moreover, the proposed optimization method can overcome some problems connected with the nonlinearity and discontinuity of the APF's price/current function. Research limitations/implications – There are two main limitations of the presented method. First, the method needs much more computing power then the classic approach. Second, according to the authors’ knowledge, currently there are no commercially available APFs, which allow to directly apply the optimization method in industrial applications. Practical implications – The presented results showed that the approach, which is the most popular in the industry, is far from being optimal from the cost perspective. As it has been shown in the investigated example, it might be possible to significantly reduce the total cost of APFs installed in the power system. Originality/value – The optimization method presented in the paper as well as all simulation results are the original authors work. It was shown that the existing harmonic compensation strategies can be significantly upgraded and the proposed optimization method may be a basis and a reference point for future commercial solutions.

Study of Electric Power System Neutral Point Grounding Using PSCAD/EMTDC

2011 ◽  
Vol 354-355 ◽  
pp. 866-871
Author(s):  
Ping Ping Han
Keyword(s):  
Theoretical Analysis ◽  
Power System ◽  
Electric Power ◽  
Transmission Lines ◽  
Single Phase ◽  
Electric Power System ◽  
Neutral Point ◽  
Voltage Level ◽  
Direct View ◽  
Simulation Results

Neutral point grounding which is related to voltage level, network structure, insulation, communication and relay protection is very important problem to power system. Nowadays, the choice of neutral point grounding mode mainly relies on operation experiences or theoretical analysis which could not give a direct view of the dynamics of electric power system during disturbances. Therefore, this paper has established the simulation model of electric power system neutral point grounding with PSCAD/EMTDC to show the dynamics of neutral point grounding when disturbed by single-phase grounding in transmission lines, and the application of each neutral point grounding mode has been analyzed according to simulation results. The dynamic model of neutral point grounding in this paper is meaningful to the analysis of high-order, non-linear transients of power system as well.

Pengaruh Investasi Asset Jangka Pendek Dan Aktiva Terhadap Laba Usaha Pada Pt. Taspen (Persero)

2018 ◽  
Vol 1 (1) ◽  
pp. 21
Author(s):  
Ilyas Lamuda
Keyword(s):  
Return On Investment ◽  
Quantitative Methods ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Rate Of Return ◽  
Short Term ◽  
Descriptive Data ◽  
Short Term Investment ◽  
Accounting Rate ◽  
Positive Effect

This study was to determine the effect of Short-Term Investments and Assets Assets in generating profits in the company PT. Taspen. The method of analysis used qualitative methods That is explained and analyzed by descriptive data. Quantitative methods to study whether the Short-term investment is profitable or not, can be determined either by the method Accounting Rate Of Return (ARR) That method that measures the level of profit from investments used to gain tersebut.dan the return on investment assets at PT. Taspen. To test the hypothesis then performed calculations using multiple linear regression analysis. Furthermore pengelohan data and hypothesis testing will be assisted by a computer program Softwere SPSS (Statistical Service and Solution product).Research shows that variable Short Term Asset Investments concluded that simultaneous effect relationship is negative and insignificant. But in partial, it provides a significant and positive effect on earnings. Assets Investments variable and not significant positive effect on earnings, but in partial, it provides a significant and positive effect on earnings.

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