TeslaPower Booster
TeslaPower`s globally patented solution,
the 3 TeslaPower booster
The TeslaPower Booster
Tesla Power`s globally patented solution, the 3 TeslaPower booster
B15
- Increases the nominal power by 15%
- Reduces the power loss by 25%
- Reduces magnetic radiation by 15%
B20
- Increases the nominal power by 20%
- Reduces the power loss by 33%
- Reduces magnetic radiation by 20%
in development
B20C
- Increases the nominal power by 20%
- Reduces the power loss by 33%
- Reduces magnetic radiation by 20%
- Control of the transmitted power and replacing variable transformers
- Improve power quality (THD reduction)
in development
The TeslaPower Booster are using the existing overhead- and earth-cables.
No additional transmission infrastructure is needed!
Technology
All TeslaPower booster share the same technological fundamentals
All TeslaPower booster are connected between the star-point and the earth of the supplying transformer, injecting the third harmonic (U3) of the main voltage.
This setup decreases the amplitude of the resulting (supersinusoidal) phase-to-earth voltage (Ule), making it up to 16% lower than the line-to-star voltage (Uph), as illustrated in the accompanying figure A.
This reduction in amplitude allows for an increase in the main voltage and power of an existing AC system by 16%, without exceeding the maximum line-to-earth (insulation) voltage.
How the B-Grid works
Booster block diagram
The main components of the TeslaPower booster
B15 Booster for insulated grid (MV)
1 – Main transformer, 2 – Tap Changer, 3 – Star Point, 4 – Star to earth resistance Rg (option), 5 – Disconnector & Earthing Switch (for Service), 6 – Line to earth Capacitor Cg, 7 – Circuit Breaker MV, 8 – B15 transformer MV, 9 – DC/AC Converter.
(The blue components are scope of supply from Tesla Power).
The outputs of the main transformer (1) are equipped with +15% taps and with the tap-changers (2). The single phase B15 is connected between the star point (3) of the main transformer and the earth. The capacitors (6) depend on the type and length of the conductors. In some insulated grids a high resistances Rg (option) and a Peterson coil Lg (option) are connected between the star (3) the ground.
During B15 operation
The circuit breaker (7) is closed, the star to ground voltage is equal to the third harmonics U3. The converter 9 produces the U3 voltage and the single phase B15 transformer (8) steps up this voltage to 1/6 of the main voltage. The tap changer (2) connect the 115% transformer output to the grid. During operation, the B15 transfer 15% more power (115%*Pn). The Booster does not change the line-to-line voltage, the line current or the magnetically radiation (smog), but it reduces the specific conductive losses Pv/Pn by 15%. The transmitted power is equal or less than Pn, this loss-reduction is equal or more than 28%.
If the B15 isn’t active,
the circuit breaker (7) disconnects the B15 trafo from the star (3) of the transformer, the 100% taps are connected to the grid. The star to grid voltage is equal to (around) zero. The network transfers the nominal power Pn.
In case of fault (grid fault or booster fault), the circuit breaker (7) disconnects the B15 transformer from the star point (3), the tap changers (2) disconnects the +15% taps and connects the 100% outputs to the line conductors.
In case of Booster fault the network transmits the nominal
power Pn, even though the B15 is disconnected. The deactivation and activation of the B15 can occurs without interruption of the process. Because of the verry low B15-power, the main components (converter) can be built redundant.
B15 Booster for grounded grid (HV)
1 – Main transformer, 2 – Tap Changer 3 – Star Point, 5 – Disconnector & Earthing Switch (for Service only), 6 – Line to earth Capacitor Cg, 7 – Bypass Switch, 8 – B15 transformer, 9 – DC/AC Converter.
(The blue components are scope of supply from Tesla Power).
The outputs of the main transformer (1) are equipped with +15% taps and with the tap-changers (2). The star point (3) of the main transformer (1) output is grounded. The capacitors Cg (6) between star and ground depend on the type of the conductors. The single phase B15 Booster is connected between the star (3) of the transformer output and the earth.
During B15 operation
the circuit breaker (7) is open, the Star to ground voltage is equal to the third harmonics U3. The converter (9) produces the U3 voltage and the single phase B15 transformer (8) steps up this voltage to 1/6 of the main voltage. The tap changer (2) connects the 115% transformer output to the grid. The B15 Booster does not change the line-to-line voltage and the line current in.
If the B15 isn’t active,
the bypass switch (7) is closed and connects the star (3) with the ground (grounded grid). The star to grid voltage is equal to zero. The 100% taps are connected to the line. The network transfers the nominal power Pn.
In case of fault (grid fault or booster fault),
the bypass switch (7) connects the star point (3) with the ground (grounded grid), the tap changers (2) disconnects the +15% taps and connects the 100% outputs to the line conductors.
In case of Booster fault the network transmits the nominal
power Pn, even though the B15 is disconnected. The deactivation and activation of the B15 can occur without interruption of the process. Because of the verry low B15-power, the main components (converter) can be built redundant.
B20 Booster
The B20 Booster is an add-on to the B15 Booster
The necessary measures to extend a B15 Booster to a B20 Booster are:
- Increasing the B15 power
- Connecting an active filter (AF) in serial to the main transformer output
- Extend the main transformer with +20% (and +15%) taps
- Option: connection to a battery plant.
The three phases B20 transformer (1) conducts the main currents and injects the three phase U5 voltage. The B20 or the B15 Booster needs only reactive power – see figure.
B20C Booster
B20C Booster helps to develop a smart grid
The B20C Booster has the topology of the B20 Booster. The B20 is adding a variable capacitive or inductive voltage Uc to the main voltage, The B20C can replace a variable transformer, which also delivers variable capacitive or inductive power.
High power smart grid with Booster:
The B20C can also deliver active power. In this case B20C must be connected to a storage device (battery plant). This is the future of the power transmission with B20C (smart grid).
The B20C converter response time is very fast (less 100 msec) and is faster than the response time of mechanically switched variable transformer.
The LV-cabinet of the Booster is ideally located in the substation close to the main transformer. The B-transformers and the HV switches can be located outdoor.
The B15 Booster B-Network
The B-perimeter corresponds to the maximal distance between the boosters, which is depending on the load current and on the conductors’ inductance.
The figure shows a high voltage B15-network with one supplying 360 kV HV transformer and two interconnected HV/MV transformers.
B-network interface to AC-network by autotransformer
HV autotransformer are adapting the B-line HV voltages (red) to the AC-line HV voltages (black).
The interface between a high voltage B-network and a medium voltage B-network:
Conventional HV/MV transformer with +15% taps are transforming the HV B voltages to MV B-voltages and build a MV distribution B-network. This transformers are automatically decoupling the U3 voltage.
The interface between a MV B-network and low voltage AC-network:
Conventional MV/LV transformers (with 15% taps) are coupling the MV B-network with the LV AC network.
Redundance
The design of the booster was developed to ensure network availability
Booster Design and
Grid Availability
Ensures grid availability with reduced power during a booster failure.
Redundant Converter
Failure
Automatically transfer to the redundant converter
Earth Faults and
Short Circuits
Disconnecting the booster from the star point of the main transformer.
20 kV Test bench in Switzerland
© TeslaPower AG