Power supply system 2xKONIS-T
DC voltage supply
Redundant parallel power supply systems
The most important energy facilities (thermal and hydro power plants, large transmission substations, etc.) should have the highest possible reliability of power supply because the possible damage caused by a power supply failure at a critical moment can surpass by far the price of power supply.
The right choice for such facilities is redundant parallel connection of two completely independent power supplies. Thereby independent double supply of each load or a small group of loads is provided. Redundancy of cables themselves is often applied. High reliability is based on the requirement that the failure of one system does not in any way affect the operation of other system, which continues to supply all loads without interruption.
DC power supply system 2xKONIS-T consists of two completely independent power supply systems KONIS-T, configured in a redundant parallel system. The system KONIS-T is a complete system including distribution boards and batteries, based on rectifier KONIS T-220, which controls the whole system.
Rectifier KONIS T-220 is designed as a simple source of stable DC voltage, and can be applied as a vital component of the system for uninterruptible power supply of specific DC loads whose reliable operation is of particular importance. In addition to loads supply, rectifier provides automatic charging and re-charging of the connected battery by precise DC voltage without ripple.
The base of the rectifier makes a robust and very reliable three-phase thyristor bridge for full-wave rectifying of mains voltage. Galvanic isolation and voltage adjustment is enabled by three phase input transformer. The output filter reduces the output voltage ripple according to the requirements of sensitive loads and batteries.
Cooling of the rectifier is derived by natural air flow, which by avoiding the fan, further increases its reliability and availability.
The operation of the rectifier is controlled by the modern microprocessor control unit KONLOG.
Communication with the station computer, dispatch center and specialized service center is possible.
The signaling status of the various parts of the rectifier and power supply and measurement of all relevant parameters of power supply are displayed on the synoptic panel of the control unit:
- mains voltage (phase voltages UL1, UL2 and UL3)
- output voltage and rectifier output current
- battery voltage and current
- load voltage and current
- battery temperature and capacity
In addition to the perfect adjusted charging and float charging voltages, it offers the possibility of different modes of automatic charging and recharging, charge current limiting, checking the integrity of the battery circuit, indicating the battery status, checking the battery capacity, protecting from high or low charging voltage, protecting from deep discharge, signaling increased temperature etc.
The rectifier further monitors the supply voltage of connected loads and signals a deviation from the declared limits. It especially monitors the insulation of plus and minus pole towards the earth and signals the occurrence of earth faults. It also detects the occurrence of a short circuit and activation of the circuit breaker.