JPS6143937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device such as a nuclear fusion device, and particularly relates to an energy storage and transfer method of the power supply device.

FIG. 1 shows an example of a conventional power supply device for a nuclear fusion device. In FIG. 1, 1 is a line connecting an AC power source and a rectifier 2 (not shown), 3 is an inductive energy storage coil, 4 is an AC/DC converter, and 5
7 is a load coil of the fusion device, 8 is a capacitor connected to the line 5, and 9 and 10 are DC lines forming a DC circuit.

As for the operation of the power supply device shown in FIG. 1, first, energy flowing from an AC power source (not shown) through a line 1 and a rectifier 2 passes through a converter 4 and a line 9, and is stored in a coil 3 as inductive energy. In this case, the converter 4 is in a short-circuited state when viewed from a DC circuit such as a bypass pair.

Next, when the required energy is to flow into the coil 7, a part of the energy stored in the coil 3 is transferred to the line 5 by reverse conversion operation of the converter 4, and then a part of the energy stored in the coil 3 is transferred to the line 5. By performing forward conversion operation, the energy is transferred to the coil 7 via the DC line 10.

On the other hand, when the operation of the nuclear fusion device is finished and the energy remaining in the coil 7 is to be processed, the conversion devices 6, 4
The energy is transferred to the coil 3 via the lines 10, 5, and 9 by performing inverse conversion and forward conversion operation, respectively, contrary to the above-mentioned case.

A capacitor 8 is connected to the line 5 and is intended to ensure the forward and inverse conversion operation of the conversion devices 4 and 6 by temporarily storing and discharging energy.

Although this energy storage and transfer method for power supplies is commonly used and effective,
From the viewpoint of downsizing and economic efficiency of the components as a power supply device, this is not sufficient and needs to be improved.

It is an object of the present invention to effectively realize an energy storage/transfer method for a power supply device, and at the same time to make the components of the power supply device more compact and more economical.

FIG. 2 is a circuit diagram showing an embodiment of the power supply device of the present invention.

In FIG. 2, 1 is a line connecting an AC power supply (not shown) to this power supply device, 11 is a switch such as a disconnector, and 5 and 12 are connections between the disconnector 11 and AC/DC converters 4 and 6 as shown. 3 is a coil for inductive energy storage, 7 is a load coil of the nuclear fusion device, and 8 is a DC line connected to the line 5. Capacitors 9 and 10 are connected to the line 5, and are DC lines forming a DC circuit.
This capacitor 8 provides the voltage necessary when operating the first or second converter as a forced commutation type inverse converter, and is initially charged by closing the switch 11.

Furthermore, if the capacitor 8 needs to be replenished, it can be done by closing the switch 11 while the first and second converters are in bypass pair operation.

The operation of the power supply device shown in FIG. 2 is as follows: First, the disconnector 11 is closed, and an AC power source (not shown) is connected to the line 1, the disconnector 11, the lines 12 and 5, the converter 4 in forward conversion operation, and the line 9. , inductive energy is stored in the coil 3. In this case, as is well known, a high speed switch (not shown) is connected in parallel with the energy storage coil 3 and the first converter 4 is not operated as a bypass pair, but the high speed switch is closed and all the current flowing through the converter 4 is switched to the high speed switch. It is also possible to move to Moreover, when extracting energy from the coil 3, the first converter 4 may be operated as an inverse converter and transferred from the high speed switch to the first converter.

Next, when the required energy is to flow into the coil 7, the disconnector 11 is opened and the converter 4, 6
By performing inverse and forward transformations, respectively,
A part of the energy stored in the coil 3 is transferred to the coil 7 via the line 9, the converter 4, the line 5, the capacitor 8, the converter 6, and the line 10, and is used for operation as a nuclear fusion device. .

On the other hand, when the energy remaining in the coil 7 is to be processed after the operation as a nuclear fusion device is finished, the disconnector 11 is left open and the converters 6 and 4 are operated to perform reverse conversion, respectively. , by performing forward conversion operation, energy is transferred to the coil 3 via the above-mentioned path in reverse.

After that, if energy is to be supplied to the coil 3 again from an AC power supply (not shown), the disconnector 11 may be closed and the above-described energy supply method may be performed.

In addition, when supplying energy directly to the coil 7 from the AC power supply, the disconnector 11 is closed, the converter 4 is stopped, and the converter 6 is operated in the same way as the coil 3. , becomes possible.

That is, closing the disconnector 11, converting devices 4 and 6
Forward conversion, reverse conversion operation and bypass pair operation,
Furthermore, depending on various control conditions such as zero power factor operation,
It becomes possible to store energy from the AC power supply to each coil and to transfer energy between each coil. Of course, if a serious accident such as a quench occurs in the coil 7 or the coil 3, the energy stored in each coil will be used to operate the first or second converter as a reverse converter to close the switch 11. Therefore, it can also be quickly recovered to an AC power source.

The power supply device of the present invention described above can effectively store and transfer energy, and at the same time realize a compact and economical power supply device that does not require a rectifier for energy supply.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an example of a conventional power supply device for a nuclear fusion device, and FIG. 2 is a circuit diagram showing an embodiment of the power supply device of the present invention. 3... Inductive energy storage coil, 4, 6...
AC/DC converter, 7...Load coil, 8...Capacitor, 11...Switch.

Claims (1)

[Claims] 1. A first conversion device capable of forward conversion operation and reverse conversion operation, an energy storage device connected to this first conversion device and storing energy, and a first conversion device capable of forward conversion operation and reverse conversion operation. a second converter, a load coil connected to the second converter, a line connecting between the AC terminals of the first and second converters, and a line connected to the line that opens and closes the AC power supply. In a power supply device comprising a switch and a capacitor connected to the line, the switch is closed and the first converter is operated as a forward converter by power from the AC power source to excite the energy storage device. After initially charging the capacitor and completing the excitation and initial charging, the switch is opened and the first converter is operated as an inverse converter, the second converter is operated as a forward converter, and the energy is stored in the energy storage device. A power supply device characterized in that the energy transferred to the load coil is transferred to the load coil. 2. When transferring the electromagnetic energy of the load coil to the energy storage device, operate the second converter as an inverse converter and operate the first converter as a forward converter with the switch open. A power supply device according to claim 1, characterized in that: