The testing methodologies of service aged medium voltage power cables as applied to an operating wind farm

Thermal Analysis of the Medium Voltage Cable

Energies ◽

10.3390/en14144164 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4164

Author(s):

Tomasz Szczegielniak ◽

Dariusz Kusiak ◽

Paweł Jabłoński

Keyword(s):

Temperature Distribution ◽

Analytical Method ◽

Good Accuracy ◽

Proximity Effects ◽

Electrical Performance ◽

Power Cables ◽

Power Losses ◽

Transmission Networks ◽

Medium Voltage ◽

Cable Lines

The use of high voltage power cables in distribution and transmission networks is still increasing. As a result, the research on the electrical performance of cable lines is still up to date. In the paper, an analytical method of determining the power losses and the temperature distribution in the medium voltage cable was proposed. The main feature of the method is direct including the skin and proximity effects. Then the Joule law is used to express the power losses in the conductor and screen, and the Fourier-Kirchhoff equation is applied to find out the temperature distribution in the cable. The research was focused on a cable with isolated screen and return current in the screen taken into account. The proposed method was tested by using the commercial COMSOL software(5.6/COMSOL AB, Stockholm, Sweden) as well as by carrying out laboratory measurements. Furthermore, the results obtained via the proposed method were compared with those given in literature. The differences between the temperature values calculated by the analytical method, numerical computations and obtained experimentally do not exceed 10%. The proposed analytical method is suitable in prediction the temperature of the power cables with good accuracy.

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Research of Large-Scale Offshore Wind Farm Collection System Short Circuit Equivalent Network

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.1732 ◽

2013 ◽

Vol 448-453 ◽

pp. 1732-1737

Author(s):

Liu Bin ◽

Hong Wei Cui ◽

Li Xu ◽

Kun Wang ◽

Zhu Zhan ◽

...

Keyword(s):

Large Scale ◽

Wind Farm ◽

Short Circuit ◽

Short Circuit Current ◽

System Optimization ◽

Offshore Wind ◽

Offshore Wind Farm ◽

Collection System ◽

Medium Voltage ◽

The Impact

This paper analyses the characteristics of large-scale offshore wind farm collection network and the impact of the medium voltage collection system optimization,while from the electrical technology point,it proposes the short circuit current of the collection network computational model and algorithms,based on the principle of equivalent circuit.Taking a wind power coolection system planned for a certain offshore wind farm planning for example, the validity of the model and algorithm is verified.

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