scholarly journals Dynamic Capacity Withholding Assessment by Considering the Static Limits of the Transmission Network and the Maintenance Problem of the Transmission System

2020 ◽  
Vol 12 (2) ◽  
pp. 254-265
Author(s):  
Seyed Mostafa Tabatabaei ◽  
Hossein Tahamifard ◽  
Hamidreza Abbasi fordoei
Keyword(s):  
Transmission System ◽  
Transmission Network ◽  
Dynamic Capacity ◽  
Maintenance Problem ◽  
Capacity Withholding

scholarly journals Mapping and Analysis of the Reactive Power Balance in the Danish Transmission Network

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 419
Author(s):  
Mads Nannestad ◽  
Zhe Zhang ◽  
Jundi Jia ◽  
Emil Jensen ◽  
Peter Randewijk
Keyword(s):  
Distribution System ◽  
Reactive Power ◽  
Transmission System ◽  
Scale Model ◽  
Power Balance ◽  
Transmission Network ◽  
Power Devices ◽  
Comprehensive Overview ◽  
Overhead Lines ◽  
System Operator

This paper investigates the reactive power balance of the Zealand side of the Danish transmission system (DK2) by using QV-curves. The study is performed in cooperation with Energinet, who is the Danish transmission system operator (TSO). Firstly, this paper aims to map the reactive power balance with the current challenges in the system, which appears due to a decision of changing overhead lines in the scenic area to cables. Secondly, a method is derived for obtaining a comprehensive overview of the impacts that future projects might have on the system. By dividing the transmission system into smaller areas, it is possible to analyze how the reactive power will affect the voltage; moreover, it is favorable to analyze and handle the challenges in the reactive power balance locally. This helps the TSO to quickly determine the lack of reactive power devices and issues that might occur in future expansions of the system. For this paper, a full-scale model of DK2 and SCADA-data has been utilized. It covers the period from 01-01-2016 to 20-08-2017 between the TSO and the Distribution System Operator (DSO). The studies have shown how the location of the wind production will create issues in the reactive power balance.

The Development of Grid Code Requirements for New and Renewable Forms of Generation in Great Britain

2005 ◽  
Vol 29 (3) ◽  
pp. 201-215 ◽  
Author(s):  
Antony Johnson ◽  
Nasser Tleis
Keyword(s):  
Great Britain ◽  
Transmission System ◽  
Wind Generation ◽  
Transmission Network ◽  
Code Change ◽  
Fault Ride Through ◽  
Key Stakeholders ◽  
Before And After ◽  
Power Frequency ◽  
Technical Issues

This paper presents the development of Grid Code requirements for new and renewable forms of generation in Great Britain (GB). After briefly describing the background to the GB Transmission System and the volume of renewable generation which is anticipated to connect in the future, the paper discusses the Grid Code and Grid Code change process. In particular, the paper discusses the interfaces with key stakeholders, the technical issues considered in connecting other generation technologies to the Transmission network and the rationale for the final Grid Code requirements. The technical issues discussed include fault ride through, frequency range, frequency response, power/frequency characteristic, reactive range, voltage control and power quality. The paper concludes with the experiences gained in the connection of wind generation projects to the GB Transmission System both before and after the approval of new proposals to the GB Grid Code.

scholarly journals The Possibility of Enhanced Power Transfer in a Multi-Terminal Power System through Simultaneous AC–DC Power Transmission

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 108
Author(s):  
Shaista Parveen ◽  
Salman Hameed ◽  
Hafizur Rahman ◽  
Khaliqur Rahman ◽  
Mohd Tariq ◽  
...  
Keyword(s):  
Power System ◽  
Power Transmission ◽  
Transmission System ◽  
Simulation Software ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Transmission Network ◽  
Power Transfer ◽  
Dc Power ◽  
Dc Power Transmission

The feasibility of power transfer enhancement, through simultaneous AC–DC power transmission in a two-terminal transmission network, has been proposed earlier by the authors, and the concept is well established. To meet the increase in demand for electricity, a new technique is proposed in this article to increase the use of existing transmission lines in addition to independent control of AC and DC power flow. This paper extends the concept to a three-terminal transmission network by considering a power tapping from the middle of the line. DC is also superimposed in the already existing three-terminal AC transmission system. In the proposed topology, a multi-terminal simultaneous AC–DC system is used, which is integrated with a zig-zag transformer and more than two voltage source converter (VSC) stations. Each terminal may represent an area of the power system. Anyone/two-terminal(s) may act as sending end, whereas the remaining two/one terminal(s) may act as receiving end. Power can flow in either direction through each segment of the transmission system. At sending end, VSC converts a part of AC to DC and injects it into the neutral of the zig-zag transformer. On receiving terminal, DC power is tapped from neutral of zig-zag transformer and fed to VSC for conversion back to AC. The concept is verified in the digital simulation software PSCAD/EMTDC.

scholarly journals Evaluation of hybrid models for static and multistage transmission system planning

2007 ◽  
Vol 18 (1) ◽  
pp. 106-114 ◽  
Author(s):  
R. Romero ◽  
M. Mantovani ◽  
C. Rocha ◽  
J. R. S. Mantovani
Keyword(s):  
Quality Evaluation ◽  
Heuristic Algorithms ◽  
Transmission System ◽  
Solution Technique ◽  
Planning Problem ◽  
Transmission Network ◽  
System Planning ◽  
Expansion Planning ◽  
Multi Stage ◽  
Constructive Heuristic

This work analyses the application of heuristic algorithms in the transmission network expansion planning problem using the Hybrid Linear Model (HLM). The HLM is a relaxed model which still has not been fully explored. The work presents a detailed study of a constructive heuristic algorithm for the HLM and proposes an extension of the model and a solution technique for multi-stage planning. Quality evaluation of solutions found by HLM and the possibilities of application of the model for transmission system planning are also discussed. Finally, tests with the most known systems of the specialized literature are presented.

scholarly journals Transmission System and Rural Electrification Scheme in Nigeria: Issues, Challenges, Constraints and Way forward

2019 ◽  
Vol 2 (2) ◽  
pp. 9-28
Author(s):  
France Onoabedje Akpojedje ◽  
E. C. Mormah
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Power Transmission ◽  
Transmission System ◽  
Rural Electrification ◽  
Transmission Network ◽  
Power Sector ◽  
Current State ◽  
Power Transmission System ◽  
The Way

This paper x-rayed the transmission system and rural electrification scheme in Nigeria. The electric power transmission network and rural electrification scheme were critically reviewed in terms of issues, challenges, constraints, roles and current state of the power systems to identify their areas of strength and shortcomings in the Nigeria power sector. The paper further proposes the way forward to enhance the performance of the Nigeria’s electric power transmission system and rural electrification scheme.

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