Добірка наукової літератури з теми "Power transimission line"

The Nigerian Power system is complex and dynamic, as a result of this it is characterized by frequent faults and outages resulting to none steady supply of power to the teaming consumers. This has great effect on the activities and mode of living of Nigerians. The research work was carried out on contingency analysis on the existing integrated 330KV Nigeria grid system and to carry out a shunt compensation on the violated buses, the shutdown of Eket-Ibom line being the case study so as to determine the following; uncertainties and effects of changes in the power system, to recognize limitations that can affect the power reliability and minimize the sudden increase or decrease in the voltage profile of the buses through shunt compensation of buses. Determine tolerable voltages and thermal violation of +5% and -5% of base voltage 330 KV (0.95-1.05) PU and to determine the critical nature and importance of some buses. This is aimed at bridging the gap of proposing further expansion of the grid system which is not only limited by huge sum of finance and difficulties in finding right – of- way for new lines but also which faces the challenges of fixed land and longtime of construction. The data of the network was gotten and modeled. The power flow and contingency analysis of the integrated Nigeria power system of 51 buses (consisting of 16 generators and 35 loads) and 73 transmission lines were carried out using Newton-Raphson Load Flow (NRLF) method in Matlab environment, simulated with PSAT software. Shunt compensation of the weak buses were done using Static Var Compensator (SVC) with Thyristor Controlled Reactor- Fixed capacitor (TCR-FC) technique. Results obtained showed that the average voltage for base simulation was 326.25KV, contingency 323.67KV and compensation was 322.37 KV. Voltage violations for lower limit were observed at Itu as 309KV and Eket as 306.81 KV while violations for upper limit were recorded at Damaturu as 352.85KV, Yola as 353.62 KV, Gombe as 355.98KV, and Jos as 342.97 KV. However after shunt compensation there were improvements for the violations at lower limits and that of higher limit were drastically brought down as recorded below: Damaturu 329.93 KV, Jos 330 KV, Eket 327.2 KV, Gombe 333.55KV, Itu 330KV, and Yola 330.52KV

Financial transmission right (FTR) is a kind of financial instrument to avoid congestion cost risk caused by transimission congestion. Based on the development experience of foreign transmission right market, the paper designs the financial transmission right market in line with the operation characteristics of China’s power system, including the design of transmission right product, transaction rules and settlement. Finally, the rationality and operability of the transmission right market design scheme are verified by an example calculation. The paper aims to provide theoretical reference for the construction of transmission right market in China.

Магістерська дисертація складається з пояснювальної записки та графічного матеріалу. Пояснювальна записка містить у своєму складі 150 сторінок машинописного тексту формату А4, 65 рисунків та 57 таблиць, 15 джерел використаної літератури. Графічна частина складається з 8 аркушів технічних креслень у форматі А1. В дисертації розглянуто розрахунок районної електричної мережі 110 кВ та проаналізовано методи розрахунку втрат електроенергії.
The master's dissertation consists of an explanatory note and a graphic part. The explanatory note contains 150 pages of typewritten A4 text, 65 figures and 57 tables, 15 sources of used literature. Graphic part consists of 8 sheets of technical drawings in the format A1. The dissertation considers the calculation of the district electric network 110 kV and analyzed the methods of calculation of electricity losses.