Pokhara university, a project work on transmission line design (original) (raw)
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DESIGN OF 200 MW, 160 KM TRANSMISSION LINE Most Economical Voltage Selection
The most economical voltage is given by the following empirical formula: Economical Voltage (V eco) =5.5* Where, Lt = length of transmission line =160 Km P = Power to be transmitted =200 MW cosØ = Power factor =0.96 Nc = number of circuit = 1S Then, using the above values V eco =5.5* = 212.22 KV Nearest Standard Voltage= 220 kV Taking 220 kV, as required voltage as it is more near to the obtained economical voltage, So standard voltage level of transmission line =220 kV. Surge impedance Loading (SIL) = V 2 /400 = 220 2 /400 =121 Multiplying factor (MF) = = 200/121 = 1.65 MF limit for 160 KM from provided standard table = 2.25 MF calculated (1.65) < MF limit (2.25) Hence the technical criterion is satisfied, so we select the voltage level of 220 KV.
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/preliminaries-comparison-based-on-performance-of-400kv-and-750kv-double-circuit-transmission-line https://www.ijert.org/research/preliminaries-comparison-based-on-performance-of-400kv-and-750kv-double-circuit-transmission-line-IJERTV3IS030104.pdf In this paper, A Comparison based on Standard Transmission Line Voltages is evaluated. An Overhead Double circuit Transmission Line of 400KV and 750KV has been compared based on average values of Line Parameters. Both Lines are taken as 400Km Long. The main focus of this paper is on Power handling capacity and line losses. A precise values of different parameters such as, No. of Towers required, average height of Tower, Phase spacing of Conductor, Bundle conductor spacing, and X/R ratio are also calculated. Calculation of Line and ground parameters, depending on properties of Bundle conductor has been implemented in MATLAB. An Important point based on mechanical consideration in Line performance is also highlighted.
International Journal of Advance Engineering and Research Development, 2017
Private participation in generating power is being encouraged in the country in order to meet high power requirement. As a result, many independent power producers (IPP) are establishing pit head thermal power stations. Many a times, the IPPs have to execute a contract with the state electricity board, under whose jurisdiction the location of the generating plant comes up lies, that a certain percentage of the installed capacity of the plant shall be supplied to the state grid and the balance power can be supplied to others. In such cases, there is a requirement for precisely controlled power flow over a transmission line between the IPP's generating station and the state grid substation at which the contracted power is to be delivered and provision for evacuating the balance power to nearby state grid substation. In a case where the installed capacity of the IPP is 500 MW, 300MW of power shall be supplied to the state grid whenever the generation is more than 300MW and full generated power if the generation is less than 300 MW. To achieve this control of power flow is essential. Hence it is required to select best conductor is required in order to reduce transmission losses and selection of percentage of compensation required to achieve control over the power flow in an AC transmission line. In this paper performance analysis is carried out in order to select best transmission line conductor amongst various conductors available and also percentage line compensation required to reduce reactive power flow and to control voltage and current in an AC transmission line.
Design a 161 kV transmission line system from Huwara to Jenin
2017
The idea of the project is to design transmission line system for all of the west bank from north to the south. The appropriate design for towers, conductors, insulators has been done as well as for protection system, considering future loads for the area of the project in the period of (2015-2040), and we designed substation for each city that the transmission line across it, and after collecting the specific information of the network the project synchronization built using E-TAP program.
Cost related optimum design method for overhead high voltage transmission lines
European Transactions on Electrical Power, 2008
The design of transmission lines is often the key issue for the existence or absence of failures caused by lightning. Detailed engineering studies are usually performed by electric power utilities for the design of new transmission lines. However, there are also cases where the design is based simply on tradition or on utilities' standardization policy. The paper presents a cost related method for the optimum design of overhead high voltage transmission lines, which intends to reduce or even eliminate the lightning failures. Lightning failures' cost is related to design parameters' cost in order to calculate the optimum and most economic design parameter values. In order to validate the effectiveness of the proposed method, the method is applied on several operating Hellenic transmission lines of 150 and 400 kV, respectively, carefully selected among others, due to their high failure rates during lightning thunderstorms. Special attention has been paid on open loop lines, where a possible failure in them could bring the system out of service causing significant problems. The proposed parameters that occurred by the design method and which reduce the failure rates caused by lightning, are compared with the operating transmission lines' existing design parameters showing the usefulness of the method, which can be proved a valuable tool for the studies of electric power systems designers.
UPGRADING OF A 330KV TRANSMISSION LINE TO 750KV TO SUPPLY A POWER OF 40000MW
Transmission lines are used to transmitting power from the generating stations to load centers. With the high demand for power, the present 330KV has developed various short-comings incases of surge problems, short- circuits, transients to mention a few. Hence the need to increase the voltage of the transmission lines is emphasized. In this work, a 750KV transmission line is analyzed in other to be able to transmit a power of about 40,000MW. The generating stations are assumed to be operating at the same voltages. Two transformers are employed in series to step up the voltages from the generating stations to the required voltage for transmission. A bundled conductor with eight (8) conductors per phase is used for the power transmission. This shows an improvement in transmission as the effect of corona is countered. There is also an increase in the GMD and GMR of the line which leads to an increase in the line capacitance and a decrease in the line inductance. The former causes an increase in the charging current thereby improving the power factor while the latter helps to reduce the line loss. The tower is a V- shaped metal tower with insulator discs of about 35 attached to it. It is estimated that the transmission line can effectively transmit the required power, as a decrease in the surge impedance causes an increase in the surge impedance loading(SIL) of the line
Power Loss Reduction for a Proposed 330 KV Transmission Line for Improve Performance
Energy supply and stability are important topics in modern society. In order to address both of these needs, we have investigated ways of an improvement on electrical transmission. Transmission lines naturally lose energy that flows through them. We analyzed the quality of being possible, making our current electrical grid methods opposing the customarily alternating current (AC) to lessen power lost in an economical way. By comparing cost and energy loss. This work aim at examining the power losses in Nigerian 330kV network, to provide dependable models and techniques for the optimization of loss minimization in 330kV transmission network to provide dependable technical model for loss reduction strategies implementation. Electrical Transmission system takes electric power from generation system and delivers it to distribution. Moreover, an important parts of the electric power generated is lost on the transmission network. The implementation of the loss reduction strategies was done using ETAP 16.0. The sum of all energy loss is 824.184 MW which represent 21.41% of total energy generation, by implementation of the losses reductions strategies the total losses on the network, the losses reduce to 657.734 MW which represents 17.1% of the total sum of energy generated and represent 20.2% reduction of the total sum of energy loss. This percentage (17.1%) revels that there is a total loss reduction of about 4.31% of losses for strategy one. Losses reduced from 639 MW to 200.990 MW representing 44.8% of the sum of energy losses of 824.142 MW and losses reduced from 200.990 MW to 158.64 MW which represents 19.25 % of energy losses on the previous strategy on the network for the case of strategy 2 and 3 respectively. The total energy recovered from the implementation of the loss strategies to the network is 521.69 MW which represents 63.2% of the energy loss recovered
1200 kV UHV Transmission Line Simulation Study
Journal of emerging technologies and innovative research, 2018
Ultra High Voltage (UHV) transmission, at 1200 kV, is comparatively a new field which has ample scope for technological advancement and research. At Bina, Madhya Pradesh (India), Powergrid Corporation of India has established a National Test Station. This UHV test station operates at world's highest transmission voltage of 1200 kV. Several technical tests are being carried out to make the UHV system commercially viable. In order to carry out various studies related to Thyristor Controlled Series Capacitor (TCSC), Controlled Shunt Reactors (CSR) and other FACTs devices a basic simulation model of Transmission line is designed using PSCAD software, in which required FACTs devices may be incorporated to carry out the performance analysis and other advanced studies. Present paper covers the basic simulation model of the line operating at 1200 kV. It is based on the standard specifications and parameters of Indian UHV transmission system. The simulation model will be also useful in the size optimization of ultra high voltage overhead transmission line structure.