Grid and System Protection for CHPUs and Batteries
At a glance
TELE wants to make the world a better place. We do this through smart, sustainable technology and a focus on renewable energy from resources that regenerate themselves, can be recycled, or are abundant, such as solar, wind, water, and biomass. With the increasing number of decentralized power generators, the challenge of keeping the grid stable increases. TELE’s technology helps to prevent the overburdening of our networks and to ensure reliable electricity generation and distribution. The TELE NA003 grid and system protection has already proven itself in the fields of solar, hydro and wind power for several years. And now it is conquering the areas of biomass and energy storage.
As well as solar power and wind plants, combined heat and power (CHP) units and battery storage also provide us with electrical energy. For the connection of such an energy supplier to the public electricity network, an external grid and system protection must be installed to achieve a country-specific standardized plant output. The TELE NA003 continuously checks the network quality and, in case of failure, decouples the system immediately. In this way, unintentional islanded operation is prevented, thereby preventing a dangerous situation for maintenance personnel. The system can also be specifically adapted to individual requirements via OpenSetup.n.
The unique case of CHPUs
Random thresholds and switching times for non-regulated energy producers, such as occur in combined heat and power units (CHPU), for example, are no problem for the TELE grid and system protection. After each grid error, the device calculates new random thresholds/values within random limits and shows them on the display. The big advantage of this method is that no feeder in the system is discriminated against. In this way, a destabilization of the network by simultaneously supplying or disconnecting several large producers is avoided.
The unique case of energy storage
Sometimes we do not consume all the renewable energy that we have produced, and wish to save it for later. It may also happen that we needed electrical energy when none can be produced, for example, at night, when the sun is not shining, or when there is no wind. In such cases, the energy can be stored in an energy storage device, such as an intermediate storage battery. Specifically, it may be that an already existing system (for example, a photovoltaic system) is to be retrofitted with an energy storage device. Due to this measure, it may happen that the new, larger, facility requires external grid and system protection. The TELE grid and system protection can also, in this case, provide the right country-independent and flexible solution.ösung.
- Greater nominal voltage and nominal frequency range (0…560 VAC or 0…325 VAC, 40-65 Hz)
- Monitoring of single- and three-phase systems (with and without network) via a device
- A device for low and medium voltage
- Multinational device with pre-installed country-specific standards
- Open setup function
- Password protection and lockable
- Non-volatile fault memory with up to 50 entries
- Functional safety
- Islanding operation detection by monitoring the phase voltage, RoCoF (rate of change of frequency) and/or vector jump
- Randomized thresholds and response times for non-controllable power generators (CHPUs, for example)