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Power generation and distribution

The future belongs to the generation of energy from renewable sources. Resources available in unlimited quantities, such as solar or wind power, can ensure our power supply even over the long term. The technical challenges are diverse, but TELE provides network stability and safety.

Power generation and distribution

Power from sustainable sources presents energy companies with many challenges. For example, photovoltaic and wind turbines feed power into the public power grid irregularly, depending on whether the sun is shining or the wind is blowing hard enough. Power is needed even when none is being generated, and vice versa. The system must store energy in order to balance this out, avoid supply fluctuations, or endanger network stability. TELE solutions can help.

Whitepaper grid stability (PDF 44kB)
NA Schutz Tele RE NA003

Supplier-side separation - grid and system protection

Grid and system protection is switched between a decentralized energy producer, such as a photovoltaic system, for example, and the grid of the public energy supply company (EVU) and continuously checks the grid quality. If the voltage or frequency in the public grid rises or falls beyond permissible limits, the small power station is immediately decoupled. Now the grid operator can ensure that the grid is stable again. Only then can small power stations be reconnected.

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Consumer-side separation - NSO

TELE’s NSO disconnects consumers in a controlled manner as soon as the grid becomes unstable. Two scenarios are possible: Either the grid operator sends a signal in the event of grid problems, or the NSO can also itself directly measure if the grid is unstable, when, for instance, the frequency drops impermissibly. Only once the grid is stable again will the NSO automatically connect the consumer back into the grid. Additionally, the corresponding data can be read and made further use of via a communication module on various devices, such as industrial PCs and cellphones.

Avoid feeding - load monitor G2BM

If it is desirable to generally avoid feeding into a grid, the G2BM load monitor from TELE is used. It works via effective power capturing, optionally in single and 3-phase grids, with an adjustable threshold value and separately adjustable start-up bridging and trigger delay. If you use underload monitoring, the device switches off if the consumption falls below a certain threshold value. If negative energy is consumed, i.e. fed in, it is also switched off.

Data sheet

Peak load management - Eco8 switching unit

Energy usage that is as even as possible during the course of the day has high savings potential for the energy supplier and prevents grid failures. With the Eco8, TELE offers a switching device that minimizes load peaks via a consumption trend calculation. To do this, it switches different consumers across 8 isolated relay outputs (expansion up to 64 consumers possible) off and back on as soon as the adjustable target value for control mode is exceeded. The duration is variably adjustable according to the specifications of the EVU and can also be limited by the momentary value.

Data sheet
Netzwischdetektor von Tele für Netzstabiltiaet

Detecting short-term interruptions - V2UF brown-out detector

Short interruptions in the grid can lead to undefined conditions in control cabinets. To prevent this from happening, the V2UF brown-out detector from TELE ensures continuous voltage monitoring, detects grid brown-outs/short interruptions of at least 10 ms, and guarantees a safe switch off/on of downstream consumers. In this way, the device prevents components in the control cabinet reacting to short interruptions with undefined states and produces a reset pulse for a controlled restart after a power failure.

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Stephanie Windhager
Stephanie Windhager Innovation

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