engineering

Interconnector

Interconnector is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Interconnector rather than just read about it. In short: An interconnector (also known as a DC tie in the USA) is a structure which enables high-voltage DC electricity to flow between electrical grids, connecting separate AC networks, or linking synchronous grids. It may be formed of submarine power cables, underground power cables or overhead power lines.

Key takeaways

Interconnector belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Interconnector to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Interconnector from memory before moving on to harder problems.

Reference excerpt

An interconnector (also known as a DC tie in the USA) is a structure which enables high-voltage DC electricity to flow between electrical grids, connecting separate AC networks, or linking synchronous grids. It may be formed of submarine power cables, underground power cables or overhead power lines. The longest interconnection as of July 2022 was the 2,210 km (1,370 mi) Hami - Zhengzhou delivering 8 GW of high voltage direct current power. The longest proposed connector is the 3,800 km (2,400 mi), 3.6 GW Xlinks Morocco-UK Power Project.

Economy Interconnectors allow the trading of electricity between territories. For example, the East–West Interconnector allows the trading of electricity between Great Britain and Ireland. A territory which generates more energy than it requires for its own activities can therefore sell surplus energy to a neighbouring territory. Interconnectors also provide increased resilience. Within the European Union there is a movement towards a single market for energy, which makes interconnectors viable. They are essential to achieve security of supply. As such, the Nordic and Baltic energy exchange Nord Pool Spot rely on multiple interconnectors. The fullest possible implementation of this is the proposed European super grid which would include numerous interconnectors between national networks. Interconnectors are used to increase the security of the energy supply and to manage peak demand. They enable cross-border access to the producers and consumers of electricity, thus increasing the competition in energy markets. They also help integrate more electricity generated from renewable sources, thus reducing the use of fossil fuel power plants and CO2 emissions. Interconnectors aid adaptation to changing demand patterns such as the uptake of electric vehicles. In many parts of the world, there is a lack of interconnectors and building more of them could enable more efficient regionally integrated electricity systems with a greater share of renewable energy. One example of a region that could benefit from this is ASEAN.

Infrastructure

Interconnectors may run across a land border or connect two land areas separated by water. As of July 2022 there are at least 35 international connectors and many more intra-national connectors, see high-voltage direct-current (HVDC) projects.

See also List of high-voltage direct-current (HVDC) projects Variable-frequency transformer Solid-state transformer

References

Worked examples

Example 1 — a first encounter with Interconnector

Start with the simplest possible case. Write down what Interconnector claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Interconnector before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Interconnector ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Interconnector

In research: Interconnector appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Interconnector in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Interconnector is common in secondary-school and first-year university syllabi. It links to neighbouring topics Electric power infrastructure, so understanding it makes those chapters shorter.
In everyday life: Look for Interconnector outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Interconnector in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Interconnector means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Interconnector out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Interconnector in simple terms?

Why does Interconnector matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Interconnector?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Interconnector.