Hitzinger
Dynamic UPS, Diesel UPS, Dynamic Diesel UPS
The security of supply is also the consideration of
effects from others users or indeed, the effects from faults and dirty
loads within the mains distribution, the purpose of the Hitzinger DRUPS
is to guarantee the supply within tolerance and to protect against the
poor input supply and generate a high quality output.
The Hitzinger Dynamic Diesel UPS system comprises four major
elements: Diesel engine, generator, kinetic energy storage module
and coupling choke.
The kinetic energy module, generator and coupling
choke work together to provide power conditioning and ride through
energy for the UPS system, whilst the diesel engine provides the
long-term back up for a mains failure. The Kinetic
Energy module is completely brushless and site maintainable being
designed for maximum availability. The kinetic
energy storage module KIN consists of two rotating parts the inner –
and the outer rotor.
The outer rotor that is equipped with a squirrel cage rotates with
2600 rpm and runs freely on the shaft of the inner rotor.
The inner rotor equipped with a specially designed winding rotating
at synchronous speed (1500 rpm) coupled via a flexible coupling to
the synchronous alternator. In the event of mains failure the
magnetic field of the inner rotor brakes the outer rotor and keeps
the speed of the synchronous alternator constant via a control unit.
The input stabilising filter system includes the coupling choke;
this connects the input grid supply with the UPS high quality output
supply. It allows large voltage differences between both AC systems
by means of reactive currents for any direction, independent of the
active power flow. The special design of the choke provides a high
degree of de-coupling in both directions between the input and the
output. The output voltage and input current are
completely independent of each other. It is possible with the
coupling choke to prevent all the harmonics and transient events
between input and output. Harmonics in the output current are not
transmitted to the input side.
The input current consists only of the sinusoidal fundamental
waveform required for power transfer. Likewise, harmonics and
transients in the input voltage have no effect on the quality of the
output voltage. This independence is achieved through the calculated
combination of the coupling choke high impedance characteristics to
harmonic currents and the special design synchronous machine
windings and selective damper cage representing a short circuit to
these harmonics preventing reflection to the mains supply.
Hence the Coupling choke provides:
-
Static & transient voltage decoupling of the
input mains & the UPS bus
-
Harmonic filtering
-
Input load leveling irrespective of 100%
unbalanced output load
-
Input Power factor correction > 0.98 from
0–100% load at nominal voltage
In the event of input short circuit the current
flow towards the grid network is limited by the choke to <200% I
nominal until the input is disconnected. During this transient
situation the coupling choke maintains the UPS bus voltage and
ensuring all the kinetic stored energy can be fully utilised for
supporting the critical load.
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Technical information associated with:
Dynamic Diesel UPS
Dynamic Diesel UPS Technical Data
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