Bridge-type circuit, and direct current breaking device and control method thereof
First Claim
1. A bridge-type circuit, comprising an H-bridge switch module, wherein the bridge-type circuit further comprises a buffering and reclosing module,the H-bridge switch module comprises four power semiconductor switch devices;
- every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor.
1 Assignment
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Accused Products
Abstract
A bridge-type circuit comprises a H-bridge switch module and a buffering and reclosing module. The H-bridge switch module comprises four power semiconductor switch devices. Every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel. Middle points of the two bridge arms respectively serve as an input terminal and an output terminal. The buffering and reclosing module is connected in parallel with the two bridge arms of the full bridge module. Also provided are a direct current breaking device formed by connecting the above bridge-type circuits in cascade and a control method thereof. The direct current breaking device is provided with the buffering and reclosing module, such that line voltage fluctuation generated during a reclosing operation is small.
8 Citations
24 Claims
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1. A bridge-type circuit, comprising an H-bridge switch module, wherein the bridge-type circuit further comprises a buffering and reclosing module,
the H-bridge switch module comprises four power semiconductor switch devices; - every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
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9. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor; andthe bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge aims respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises an RCD circuit and a reclosing circuit;
the RCD circuit comprises a diode, a capacitor, and two resistors, wherein the diode and the capacitor are connected in series, the cathode of the diode is connected to one end of the capacitor, and the two resistors are respectively connected in parallel with the diode and the capacitor;
the reclosing circuit comprises a resistor and a power semiconductor switch device that are connected in series; and
the RCD circuit and the reclosing circuit are connected in parallel.
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18. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises an RCD circuit and a reclosing circuit;
the RCD circuit comprises a diode, a capacitor, and two resistors, wherein the diode and the capacitor are connected in series, the cathode of the diode is connected to one end of the capacitor, and the two resistors are respectively connected in parallel with the diode and the capacitor;
the reclosing circuit comprises a resistor, a power semiconductor switch device, and a diode, wherein the resistor and the power semiconductor switch device are connected in series, the diode is connected in parallel with the resistor, and the power semiconductor switch device and the diode are in series-opposing connection; andthe RCD circuit and the reclosing circuit are connected in parallel.
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19. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises an RCD circuit and a reclosing circuit;
the RCD circuit comprises a diode, a capacitor, and two resistors, wherein the diode and the capacitor are connected in series, the cathode of the diode is connected to one end of the capacitor, and the two resistors are respectively connected in parallel with the diode and the capacitor;
the reclosing circuit comprises a resistor and a power semiconductor switch device that are connected in series; and
the reclosing circuit is connected in parallel with the capacitor of the RCD circuit.
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20. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises an RCD circuit and a reclosing circuit;
the RCD circuit comprises a diode, a capacitor, and two resistors, wherein the diode and the capacitor are connected in series, the cathode of the diode is connected to one end of the capacitor, and the two resistors are respectively connected in parallel with the diode and the capacitor; and
the reclosing circuit comprises a resistor, a power semiconductor switch device, and a diode, wherein the resistor and the power semiconductor switch device are connected in series, the diode is connected in parallel with the resistor, and the power semiconductor switch device and the diode are in series-opposing connection; and
the reclosing circuit is connected in parallel with the capacitor of the RCD circuit.
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21. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge arms of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises a capacitor, a resistor, and a reclosing circuit, wherein the capacitor, the resistor, and the reclosing circuit are connected in parallel with each other; and
the reclosing circuit comprises a resistor and a power semiconductor switch device that are connected in series.
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22. A direct current breaking device, comprising a conduction branch, a breaking branch, and an energy consumption branch that are mutually connected in parallel, wherein the conduction branch is formed by connecting at least one rapid mechanical switch and a current transfer module in series;
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the breaking branch comprises one bridge-type circuit or multiple series-connected bridge-type circuits; and
the energy consumption branch is formed by a non-linear resistor;the bridge-type circuit comprises an H-bridge switch module and a buffering and reclosing module, wherein the H-bridge switch module comprises four power semiconductor switch devices;
every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel;
middle points of the two bridge arms respectively serve as an input terminal and an output terminal;
the buffering and reclosing module is connected in parallel with the two bridge aims of the H-bridge switch module; and
the buffering and reclosing module comprises a reclosing circuit and an RCD circuit, or comprises a reclosing circuit, a capacitor, and a resistor; andthe buffering and reclosing module comprises a capacitor, a resistor, and a reclosing circuit, wherein the capacitor, the resistor, and the reclosing circuit are connected in parallel with each other; and
the reclosing circuit comprises a resistor, a power semiconductor switch device, and a diode, wherein the resistor and the power semiconductor switch device are connected in series, the diode is connected in parallel with the resistor, and the power semiconductor switch device and the diode are in series-opposing connection.
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23. A method for controlling a direct current breaking device, comprising:
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1) when a direct current system normally operates, a rapid mechanical switch of a conduction branch is in a closed state, a current transfer module is in a switch-on state, and a bridge-type circuit of a breaking branch is in a switch-off mode; 2)when the system requires the direct current breaking device to break the current in the case of a short circuit; 201. the bridge-type circuit of the breaking branch is switched on, and then the current transfer module of the conduction branch is switched off; 202. after the current is completely transferred from the conduction branch to the breaking branch, the rapid mechanical switch of the conduction branch is switched off; and 203. after the rapid mechanical switch is switched off without an arc, the bridge-type circuit of the breaking branch is switched off; and
in this case, the fault current is transferred to a non-linear resistor till system energy is consumed and absorbed, and the direct current breaking device completes current breaking at this time; and3) when the system requires reclosing in a short period after the direct current breaking device completes current breaking; 301. a power semiconductor device of a buffering and reclosing module in the bridge-type circuit of the current breaking branch is switched on, and the bridge-type circuit is in a reclosing mode in this case; 302. it is judged whether the fault of transmission line is recovered, wherein (1) if the fault is not recovered, the power semiconductor device of the buffering and reclosing module in the bridge-type circuit of the current breaking branch is switched off, to terminate reclosing;
or(2) if the fault is recovered, the bridge-type circuit of the current breaking branch is switched on, the power semiconductor device of the buffering and reclosing module in the bridge-type circuit of the current breaking branch is switched off, and step 303 is performed; 303. the mechanical switch of the current conduction branch is closed, and a power semiconductor device of the current transfer module is switched on; 304. the bridge-type circuit of the current breaking branch is switched off; and 305. reclosing is ended. - View Dependent Claims (24)
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Specification