Voltage Regulation and Insulation for Large Power Long Distance Transmission Systems

1921 ◽  
Vol XL ◽  
pp. 1017-1077 ◽  
Author(s):  
Frank G. Baum
Keyword(s):  
Voltage Regulation ◽  
Long Distance ◽  
Transmission Systems ◽  
Large Power ◽  
Long Distance Transmission

scholarly journals Optimization Strategy of SVC for Eliminating Electromagnetic Oscillation in Weak Networking Power Systems

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3489
Author(s):  
Huabo Shi ◽  
Xinwei Sun ◽  
Gang Chen ◽  
Hua Zhang ◽  
Yonghong Tang ◽  
...  
Keyword(s):  
Parameter Optimization ◽  
Short Circuit ◽  
Power Grid ◽  
Oscillation Mode ◽  
Voltage Regulation ◽  
Optimization Strategy ◽  
Long Distance ◽  
Large Power ◽  
Electromagnetic Oscillation ◽  
Long Distance Transmission

The central Tibet AC interconnection project (CTAIP), which connects the Tibet power grid and the Sichuan power grid through a long distance transmission line of more than 1400 km, has a significant problem of voltage regulation. In order to improve the voltage regulation performance, six sets of ±60 Mvar static VAR compensators (SVC) were installed in the CTAIP. However, the SVCs may lead to electromagnetic oscillation below 50 Hz while improving voltage regulation capability. In this paper, the electromagnetic oscillation modes and the sensitivity of control parameters of SVC are analyzed. Then, the characteristics and influencing factors of the oscillation are discussed. It was found that there is an inherent electromagnetic oscillation mode below 50 Hz in the ultra-long distance transmission system. The employ of SVCs weaken the damping of this mode. Large proportional gain and integral gain (PI) parameters of SVCs can improve the voltage regulation performance, but weaken the electromagnetic oscillation mode damping. Therefore, a suppression method based on SVC PI parameters optimization is proposed to damp the oscillation. The essential of this method is to use the rising time of voltage response and setting time of SVCs as performance indicators of voltage regulation, and take the damping level of the electromagnetic oscillation mode as the performance index of SVC electromagnetic oscillation suppression ability. Combining the two indicators to form a comprehensive optimization index function, an intelligent optimization algorithm is applied. The process of SVC parameter optimization and the steps of multi-SVC parameter optimization in large power grids is proposed. Finally, PSCAD and real-time digital simulation (RTDS) simulation results verified the correctness of the proposed method. The optimization strategy was applied to CTAIP. The artificial grounding short circuit experimental results proved the effectiveness of the proposed strategy.

Analysis of steady-state stability of long-distance transmission systems

1978 ◽  
Vol 98 (4) ◽  
pp. 63-72
Author(s):  
Toshihiko Saito ◽  
Kozo Aratame ◽  
Hiromichi Sato ◽  
Jiro Nagasaka
Keyword(s):  
Steady State ◽  
Long Distance ◽  
Transmission Systems ◽  
Long Distance Transmission ◽  
Steady State Stability

A Discussion on recent advances in heavy electrical plant - D.C. transmission systems

1973 ◽  
Vol 275 (1248) ◽  
pp. 225-232 ◽  
Keyword(s):  
Operating Experience ◽  
Long Distance ◽  
Transmission Systems ◽  
System Parameters ◽  
Long Distance Transmission ◽  
Recent Advances ◽  
Operational Characteristics

‘D.c. transmission systems’ covers the operational characteristics and equipment from the sending end a.c. system to the receiving end a.c. system, and includes the characteristics of those two a.c. systems as well as all the equipment in between. Since d.c. transmission is the ‘challenger’ and a.c. transmission is the ‘sitting tenant’ it behoves d.c. to prove its worth using the well-developed a.c. technique as a yardstick with regard to technical excellence, performance, reliability and the all important cost. Existing schemes are reviewed in terms of the system parameters which influenced the choice of d.c. and bulk long-distance transmission is used as an example. Control of a d.c. scheme is touched upon, followed by a discussion of some recent studies and operating experience.

Improving the Performance of Long Distance Tuned AC Transmission Systems

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1133-1135
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Voltage Profile ◽  
Long Distance ◽  
Transmission Systems ◽  
Long Distance Transmission ◽  
Reactive Power Flow ◽  
Shunt Compensation ◽  
Ac Transmission ◽  
Economic Constraints

The line series reactance and shunt susceptance can be tuned by adopting series and shunt compensation. Practical, size and economic constraints will lead to limitations in location of the compensating elements at optimal points along the line. While planning long-distance transmission, it is necessary to determine not only the average degrees of compensation required, but also ensure the stable and uniform voltage profile with minimal reactive power flow.

scholarly journals Electric Power Network Interconnection: A Review on Current Status, Future Prospects and Research Direction

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2179
Author(s):  
Imdadullah ◽  
Basem Alamri ◽  
Md. Alamgir Hossain ◽  
M. S. Jamil Asghar
Keyword(s):  
Renewable Energy ◽  
Smart Grid ◽  
Electric Power ◽  
Power Grid ◽  
Clean Energy ◽  
Current Status ◽  
Long Distance ◽  
Transmission Systems ◽  
Large Power ◽  
Grid Interconnection

An interconnection of electric power networks enables decarbonization of the electricity system by harnessing and sharing large amounts of renewable energy. The highest potential renewable energy areas are often far from load centers, integrated through long-distance transmission interconnections. The transmission interconnection mitigates the variability of renewable energy sources by importing and exporting electricity between neighbouring regions. This paper presents an overview of regional and global energy consumption trends by use of fuel. A large power grid interconnection, including renewable energy and its integration into the utility grid, and globally existing large power grid interconnections are also presented. The technologies used for power grid interconnections include HVAC, HVDC (including LCC, VSC comprising of MMC-VSC, HVDC light), VFT, and newly proposed FASAL are discussed with their potential projects. Future trends of grid interconnection, including clean energy initiatives and developments, UHV AC and DC transmission systems, and smart grid developments, are presented in detail. A review of regional and global initiatives in the context of a sustainable future by implementing electric energy interconnections is presented. It presents the associated challenges and benefits of globally interconnected power grids and intercontinental interconnectors. Finally, in this paper, research directions in clean and sustainable energy, smart grid, UHV transmission systems that facilitate the global future grid interconnection goal are addressed.

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