Development of Unit Commitment Model Considering Confidence Intervals of Photovoltaics Forecast and Analysis of a Large Scale Power System

2016 ◽  
Vol 136 (5) ◽  
pp. 484-496 ◽  
Author(s):  
Yusuke Udagawa ◽  
Kazuhiko Ogimoto ◽  
Takashi Oozeki ◽  
Hideaki Ohtake ◽  
Takashi Ikegami ◽  
...  
Keyword(s):  
Power System ◽  
Confidence Intervals ◽  
Large Scale ◽  
Unit Commitment

Unit Commitment in a Large-Scale Power System including Fuel Constrained Thermal and Pumped-Storage Hydro

1987 ◽  
Vol 2 (4) ◽  
pp. 1077-1084 ◽  
Author(s):  
K. Aoki ◽  
T. Satoh ◽  
M. Itoh ◽  
T. Ichimori ◽  
K. Masegi
Keyword(s):  
Power System ◽  
Large Scale ◽  
Unit Commitment ◽  
Pumped Storage

scholarly journals A New Tool to Assess Maximum Permissible Solar PV Penetration in a Power System

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8529
Author(s):  
Dhanuja Lekshmi J ◽  
Zakir Hussain Rather ◽  
Bikash C Pal
Keyword(s):  
Power Systems ◽  
Power System ◽  
Large Scale ◽  
Unit Commitment ◽  
Renewable Energy Sources ◽  
Research Work ◽  
Clean Energy ◽  
Solar Pv ◽  
System Operator ◽  
Pv Penetration

With diminishing fossil fuel resources and increasing environmental concerns, large-scale deployment of Renewable Energy Sources (RES) has accelerated the transition towards clean energy systems, leading to significant RES generation share in power systems worldwide. Among different RES, solar PV is receiving major focus as it is most abundant in nature compared to others, complimented by falling prices of PV technology. However, variable, intermittent and non-synchronous nature of PV power generation technology introduces several technical challenges, ranging from short-term issues, such as low inertia, frequency stability, voltage stability and small signal stability, to long-term issues, such as unit commitment and scheduling issues. Therefore, such technical issues often limit the amount of non-synchronous instantaneous power that can be securely accommodated by a grid. In this backdrop, this research work proposes a tool to estimate maximum PV penetration level that a given power system can securely accommodate for a given unit commitment interval. The proposed tool will consider voltage and frequency while estimating maximum PV power penetration of a system. The tool will be useful to a system operator in assessing grid stability and security under a given generation mix, network topology and PV penetration level. Besides estimating maximum PV penetration, the proposed tool provides useful inputs to the system operator which will allow the operator to take necessary actions to handle high PV penetration in a secure and stable manner.

scholarly journals Flexibility Based Day-Ahead Generation–Reserve Bilevel Decision Model

2019 ◽  
Vol 9 (9) ◽  
pp. 1755
Author(s):  
Yan Li ◽  
Ming Zhou
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Decision Model ◽  
Large Scale ◽  
Unit Commitment ◽  
Reserve Capacity ◽  
Proposed Model ◽  
Random Failure ◽  
Upper Level ◽  
Fluctuating Wind

With the increasing penetration rate of renewable energy like fluctuating wind and solar energy, the power system has to equip itself with a more reasonable reserve capacity. Therefore, how to quantify the reserve capacity needed for dealing with the uncertainty and fluctuation has turned out to be a new problem faced by the power system integrated with large-scale renewable energy. This paper proposes a flexibility based day-ahead generation–reserve bilevel decision model. In the upper level, the day-ahead unit commitment model is constrained by flexibility reserve, which is calculated in the lower level. In the lower level, taking into account various factors of uncertainty and fluctuation, e.g., wind power ramping, load ramping and random failure of conventional units, the ramping probability distribution of an equivalent system is obtained by the universal generating function method, then the quantified relationship between operating reserve and flexibility is established ultimately. If the unit commitment scheme gained from the upper level could not provide sufficient reserve, a feedback for the correction of the upper level is needed. The rationality and validity of the proposed model are verified through the simulation of a modified IEEE-118 bus system.

Research on unit commitment with large-scale wind power connected power system

2017 ◽  
Author(s):  
Ran Jiao ◽  
Baoqun Zhang ◽  
Zhongjun Chi ◽  
Cheng Gong ◽  
Longfei Ma ◽  
...  
Keyword(s):  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
Unit Commitment

Power System Adequacy Exploration Based on UC Simulation Model

2015 ◽  
Vol 734 ◽  
pp. 744-747
Author(s):  
Zhen Bin Li ◽  
Xiao Lei Zhai
Keyword(s):  
Power Systems ◽  
Power System ◽  
Simulation Model ◽  
Wind Power ◽  
Large Scale ◽  
Unit Commitment ◽  
System Operation ◽  
Short Run ◽  
Adequacy Assessment ◽  
Random Fluctuations

This paper takes Unit Commitment with Wind Power Electric Systems for instance and studies the application of relevant indicators in the short run adequacy decisions. It first conducted running adequacy assessment of the RBTS system, and then given unit combination solutions in the ample index constraints. The results show that the relevant indicators can be more accurately to depict the influence of random factors on system operation adequacy, and Unit Commitment decisions based adequacy index is able to give a unit commitment program at different adequacy levels. The research results provide a set of assessment indicators and assessment methods for short running adequacy problems of random fluctuations power accessing to large-scale power systems..

scholarly journals Scenario-based Unit Commitment Optimization for Power System with Large-scale Wind Power Participating in Primary Frequency Regulation

2020 ◽  
Vol 8 (6) ◽  
pp. 1259-1267
Author(s):  
Lili Hao ◽  
Jing Ji ◽  
Dongliang Xie ◽  
Haohao Wang ◽  
Wei Li ◽  
...  
Keyword(s):  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
Unit Commitment ◽  
Frequency Regulation ◽  
Primary Frequency

Unit Commitment in a Large-Scale Power System Including Fuel Constrained Thermal and Pumped-Storage Hydro

1987 ◽  
Vol PER-7 (11) ◽  
pp. 51-52
Author(s):  
K. Aoki ◽  
T. Satoh ◽  
M. Itoh ◽  
T. Ichimori ◽  
K. Masegi
Keyword(s):  
Power System ◽  
Large Scale ◽  
Unit Commitment ◽  
Pumped Storage

Ordinal optimization theory to solve large-scale power system unit commitment

2017 ◽  
Vol 13 (2) ◽  
pp. 187-194 ◽  
Author(s):  
Min Xie ◽  
Yanhan Zhu ◽  
Shaojia Ke ◽  
Yuxin Du ◽  
Mingbo Liu
Keyword(s):  
Power System ◽  
Large Scale ◽  
Unit Commitment ◽  
Optimization Theory ◽  
Ordinal Optimization
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