Overhead lines and reactors / 18.07.2024

Cable line with shunt reactor

Usually, AC cable lines are up to 10 km long. However, in some cases the length can reach 50 km or even 100 km. In such cases, the cable line has a significant capacitance, which must be charged and discharged following the sine wave of the alternating voltage of the AC network. This alternating current

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Various energy topics / 01.07.2024

Software VS Formula

In the energy sector, there is more and more complex computer software for calculating equipment, various network operating modes and transients. On the one hand, this is good, but on the other hand, it personally causes me some fear. I will try to clarify my thoughts. Many of the software methods give the impression of

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Cable lines - screen bonding / 23.06.2024

Link boxes for cable screen cross-bonding

Screen cross-bonding is an important element of many 6-500 kV cable lines built with single-core XLPE-insulated cables. Therefore, special attention should be paid to the design of the cross-bonding nodes, the specifics of their installation and operation. The screens of the main 6-500 kV high-voltage cable are removed from the cable joint using special 3-6

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Cable lines - various topics / 18.06.2024

High Voltage Cable Lines

The distribution of the book “High Voltage Cable Lines” (dated 2024) has begun: This electronic book, dated 2024, explores the design, construction and operation of alternating current cable lines rated from 6 to 500 kV, consisting of single-core or three-core cables with XLPE insulation. It is intended for employees of design organizations and power grid companies,

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Cable lines - various topics / 24.05.2024

Ribs along the cable outer sheath

There are dozens of cable manufacturers in the World. They are constantly experimenting, trying to offer the market improved cable designs. Some of these innovations are not entirely successful. Unfortunately, these experiments are paid by grid companies, which get troubles during the proccess of laying cables, their operation and repair work. In my opinion, one

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Cable lines - screen bonding / 25.04.2024

Sheath Voltage Limiters (SVL) and their damages

Single-core cables with XLPE insulation are massively used in 110-500 kV networks. Solid (two-sided) grounding of the screens of such cables leads to negative consequences, and therefore, as a rule, for screens should be used:✅Single-point grounding (see diagram)✅Cross-bonding. In both schemes, voltages may occur on screens relative to the ground caused by interference from the

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