scholarly journals A Computationally Intelligent Power Transmission Expansion Strategy in a Deregulated Energy System

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
Christopher O. Ahiakwo ◽  
Sunny Orike ◽  
Ahuruezemma O. Obioma
Keyword(s):  
Hybrid Model ◽  
Transmission Lines ◽  
Power Transmission ◽  
System Optimization ◽  
Energy System ◽  
Load Forecast ◽  
Transmission Expansion ◽  
Expansion System ◽  
Expansion Model ◽  
Bus System

This paper aims to simulate a computationally intelligent electrical power transmission expansion system and study the factors affecting power transmission expansion in a deregulated energy system to improve on the current economic conditions. The main problem facing most power system transmission is the failure to actually forecast the load expansion accurately this leads to failure in the transmission expansion design. a hybrid algorithm for the ac/dc transmission expansion planning (HTEP) and  multi algebraic formulation of the stochastic TEP model in a multi-stage planning framework will be used to analyze the  transmission expansion system, optimization problem will considers a weighted  sum of multiple objectives including cost of operation and maintenance, emission, load shedding and line investments, simulation method would consider random outages of generating units and ac/dc transmission lines as well as load forecast .The independent system operator would utilize the proposed method to select the optimal set of ac/dc transmission lines for satisfying TEP criteria. The proposed set of dc transmission system may use either current source converters or voltage source converters. The proposed algorithms are simulated on IEEE 24-bus reliability test system (RTS) and Gerner’s 6 bus system   to compare optimal plans between the original and equivalent system. Further assumptions and adjustments are searched and tested to get more accurate optimal plans. results obtained showed that the hybrid model was capable of handling future generation and load patterns in deregulated, unbundled, and competitive electricity system. the results of the study showed the hybrid model was tested in the Gerner’s 6 bus system and the expansion model after a load forecast. On the IEEE 24-bus system showed that the hybrid expansion model was able to take care of the load forecast for future expansion.

scholarly journals To Prevent or Promote Grid Expansion? Analyzing the Future Role of Power Transmission in the European Energy System

2021 ◽  
Vol 8 ◽  
Author(s):  
Karl-Kiên Cao ◽  
Thomas Pregger ◽  
Jannik Haas ◽  
Hendrik Lens
Keyword(s):  
Power Flow ◽  
Flow Model ◽  
Power Transmission ◽  
System Optimization ◽  
Energy System ◽  
Investment Strategy ◽  
Total System ◽  
Power Sources ◽  
Model Based ◽  
Flexibility Options

Future energy supply systems must become more flexible than they are today to accommodate the significant contributions expected from intermittent renewable power sources. Although numerous studies on planning flexibility options have emerged over the last few years, the uncertainties related to model-based studies have left the literature lacking a proper understanding of the investment strategy needed to ensure robust power grid expansion. To address this issue, we focus herein on two important aspects of these uncertainties: the first is the relevance of various social preferences for the use of certain technologies, and the second is how the available approaches affect the flexibility options for power transmission in energy system models. To address these uncertainties, we analyze a host of scenarios. We use an energy system optimization model to plan the transition of Europe’s energy system. In addition to interacting with the heating and transport sectors, the model integrates power flows in three different ways: as a transport model, as a direct current power flow model, and as a linearized alternating current power flow model based on profiles of power transfer distribution factors. The results show that deploying transmission systems contribute significantly to system adequacy. If investments in new power transmission infrastructure are restricted—for example, because of social opposition—additional power generation and storage technologies are an alternative option to reach the necessary level of adequacy at 2% greater system costs. The share of power transmission in total system costs remains widely stable around 1.5%, even if cost assumptions or the approaches for modeling power flows are varied. Thus, the results indicate the importance of promoting investments in infrastructure projects that support pan-European power transmission. However, a wide range of possibilities exists to put this strategy into practice.

Mapping of isolated energy system structure: case study of Kamchatka Territory, Magadan and Sakhalin Regions

2017 ◽  
Vol 923 (5) ◽  
pp. 56-63
Author(s):  
B.A. Novakovskiy ◽  
A.I. Prasolova ◽  
A.M. Karpachevskiy ◽  
O.G. Filippova
Keyword(s):  
Transmission Lines ◽  
Power Plants ◽  
Power Transmission ◽  
Russian Far East ◽  
Far East ◽  
Remote Sensing Data ◽  
Weighted Graph ◽  
Energy System ◽  
System Structure ◽  
Structural Vulnerability

The article describes a way to represent the structure of the energy system using an undirected weighted graph. It also considers the concept of structural vulnerability of the electrical grid as a key property affecting the reliability of power supply. We consider isolated energy systems of the Russian Far East, taking into account the differentiation in structural vulnerability within the networks of different types. For these purposes we propose the technique of designing and using geodatabase for the structural vulnerability assessment in the territories of the Kamchatka Territory, Magadan and Sakhalin regions. The designed technique is based on the use of open source data about power transmission lines (PTL), substations and power plants. Remote sensing data was also used. It is introduced a principle of zoning study area based on geoprocessing model. These maps were compared with some maps of crucial climatic parameters such as maximum wind speed and sleet deposits wall thickness.

scholarly journals Analysis of the electric power potential as illustrated by the UES of Russia

2021 ◽  
pp. 21-26
Author(s):  
V.V. Trufanov ◽  
P.S. Drachev ◽  
V.V. Khanaev
Keyword(s):  
Power Systems ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Grid ◽  
Electricity Consumption ◽  
Energy System ◽  
Power Transmission Lines ◽  
Available Transfer Capability ◽  
Almost Everywhere ◽  
Generating Capacity

he paper presents an analysis of the current state of the Unified Energy System (UES) of Russia, which aims to identify "weak points," regional shortage and excess energy systems, locations of the electricity consumption growth, and seeks to determine the technical potential of the power grid for electricity transmission. This analysis relies on the models developed for optimization in terms of the maximum excess capacity for the entire Unified Energy System of Russia and for individual regions of the country in the context of the existing mix of generating capacity and cross-regional structure of the power grid. Calculations were made for the conditions corresponding to the reported performance of the Unified Energy System of Russia in 2020. The cross-regional power grid of the Unified Energy System of Russia is capable of covering the capacity needs of all the country's power systems, and almost everywhere has a significant available transfer capability of power transmission lines.

scholarly journals Considering FACTS in Optimal Transmission Expansion Planning

2017 ◽  
Vol 7 (5) ◽  
pp. 1987-1995 ◽  
Author(s):  
K. Soleimani ◽  
J. Mazloum
Keyword(s):  
Power Systems ◽  
Transmission Lines ◽  
Power Transmission ◽  
Transmission System ◽  
Optimal Number ◽  
Transmission Systems ◽  
Expansion Planning ◽  
Facts Devices ◽  
Transmission Expansion ◽  
Expansion Plan

The expansion of power transmission systems is an important part of the expansion of power systems that requires enormous investment costs. Since the construction of new transmission lines is very expensive, it is necessary to choose the most efficient expansion plan that ensures system security with a minimal number of new lines. In this paper, the role of Flexible AC Transmission System (FACTS) devices in the effective operation and expansion planning of transmission systems is examined. Effort was taken to implement a method based on sensitivity analysis to select the optimal number and location of FACTS devices, lines and other elements of the transmission system. Using this method, the transmission expansion plan for a 9 and a 39 bus power system was performed with and without the presence of FACTS with the use of DPL environment in Digsilent software 15.1. Results show that the use of these devices reduces the need for new transmission lines and minimizes the investment cost.

METHOD OF SYNTHESIS OF CLOSED-LOOP SYSTEMS OF ACTIVE SHIELDING MAGNETIC FIELD OF POWER TRANSMISSION LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 8-10 ◽  
Author(s):  
B.I. Kuznetsov ◽  
◽  
A.N. Turenko ◽  
T.B. Nikitina ◽  
A.V. Voloshko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transmission Lines ◽  
Closed Loop ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Closed Loop Systems ◽  
Active Shielding

New aspects of power grid facilities personnel workplaces electromagnetic environment

2020 ◽  
Vol 60 (9) ◽  
pp. 569-574
Author(s):  
Nina B. Rubtsova ◽  
Sergey Yu. Perov ◽  
Olga V. Belaya ◽  
Tatiana A. Konshina
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Grid ◽  
Spectral Characteristics ◽  
Ground Level ◽  
Frequency Characteristics ◽  
Frequency Range ◽  
Electromagnetic Environment ◽  
Limit Values ◽  
Special Assessment

Introduction. Electromagnetic safety of power grid facilities staff requires the exclusion of electromagnetic fields (EMF) harmful effects. EMF is evaluated by 50 Hz electric and magnetic fields (EF and MF) values in the framework of working conditions special assessment, and very rarely the analysis of the electromagnetic environment (EME) is carried out in depth. The aim of the study - EME hygienic assessment of power grid EHV facilities personnel workplace with adequate 50 Hz EF and MF levels evaluation as well as the analysis of EF and MF in the frequency range from 5 Hz to 500 Hz amplitude-frequency characteristics. Materials and methods. 50 Hz EF and MF values assessment was carried out on open switchgears (S) of substations and within sanitary breaks of 500 and 750 kV overhead power transmission lines (OTL). Measurements along to OTL trasses was performed using matrix-based method. Measurements and analysis of EF and MF values in 5-500 Hz frequency range amplitude-frequency characteristics were performed in the territory of 500 and 750 kV S. Results. Power frequency 50 Hz measurements results at 500 and 750 kV S ground-level personnel workplaces showed the presence of an excess of permissible limit values by EF intensity and the absence of an excess by MF. The measured EF values within 500 and 750 kV OTL sanitary gaps require limiting the working time of linemen due to the excess of the hygienic norms for full work shift, while the MP levels were almost completely within the standard values for persons not occupationally connected with electrical installations maintenance. MF and EE frequency range from 50 Hz to 500 Hz spectral characteristics analysis showed that 3rd harmonic percentage does not exceed 2.5% for EF and 6% for MF of the main level, the level of the 5th harmonic does not exceed 1% for EF and 3.5% for MF, the level of the 7th harmonic does not exceed 0.2% for EF and 0.8% for MF. These data show despite its low levels the contribution of MF different harmonics in a possible adverse impact on humane than EF corresponding harmonics. Conclusions. There was the confirmation of the previously justified use of the "matrix" scheme for of EF and MF values measurement along OTL routes. The relevance of to EF and MF all frequency components expos ure assessing possible health risk in extremely high voltage S territories and under OTL, based on international recommendations due to the lack of sanitary regulations in the Russian Federation for >50 Hz-30 kHz EF and MF, is shown.

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