Why Can only Submarine DC Cables be Used for Long-Distance Submarine Power Transmission?

ZMS high-voltage XLPE DC submarine cable development and technological innovation

The fundamental reason: the capacitive current of AC cables limits their transmission distance. This is for long-distance submarine projects, the transmission of large power is very difficult. Submarine DC cables have no capacitive current, transmission capacity is not limited by distance. So only a DC cable can be used to transmit power.

From the beginning of last year until now, the Russian-Ukrainian conflict, the Palestinian-Israeli conflict and so on broke out one after another. In these wars and conflicts, aerial cables, concentric cables, submarine cables and so on all play different degrees of important role.

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Understanding Common Problems with High Voltage Cables: Causes and Solutions

Common high voltage cables transmission projects

High voltage cables are a kind of power cable, that refers to the power cable used to transmit between 1kv-1000kv, mostly used in power transmission and distribution. And high-voltage cables are very common in daily life, from big factory workshops to small home appliances and so on. For high-voltage cables, people will also have many questions, … Read more

Why Can’t High-Voltage Cables Be Buried in the Ground?

Ultra-high voltage transmission refers to the use of 500 kV-1000 kV voltage levels to transmit electrical energy. If the 220kV transmission indicator is taken as 100%, the relative investment per kilometer of UHV transmission, the relative cost of 100 kilometers per kilowatt-hour of electricity transmission, and the consumption of metal materials will be greatly reduced. In this way, the utilization rate of the line corridor has been significantly improved.

In our daily life, we can often see overhead ultra-high voltage transmission projects. However, have you ever thought about this question: Why can’t all high-voltage cable be buried underground like urban underground cables? 

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