Power conversion system
A control apparatus for a power conversion system is a control apparatus for a power conversion system including a power converter connected to a power supply or a capacitor through a wire, a coil disposed at a position around the wire where a magnetic flux is linked with the coil when a short-circuit failure in which a voltage of the power supply or the capacitor is short-circuited occurs, the magnetic flux being generated by the short-circuit failure, and a voltage detection circuit configured to detect a voltage value of a voltage across the coil. The control apparatus includes: a voltage acquisition unit configured to acquire the voltage value of the voltage across the coil detected by the voltage detection circuit; and a failure detection unit configured to detect a short-circuit failure of the power converter, based on the voltage value acquired by the voltage acquisition unit.
1 . A power conversion system comprising:
a power converter connected to a power supply or a capacitor through a wire;
a coil disposed at a position around the wire where a magnetic flux is linked with the coil when a short-circuit failure in which a voltage of the power supply or the capacitor is short-circuited occurs, the magnetic flux being generated by the short-circuit failure;
a voltage detection circuit configured to detect a voltage value of a voltage across the coil; and
a control apparatus, wherein
the control apparatus includes a voltage acquisition circuit configured to acquire the voltage value of the voltage across the coil detected by the voltage detection circuit, and a failure detection circuit configured to detect a short-circuit failure of the power converter, based on the voltage value acquired by the voltage acquisition circuit, and
when a plurality of the power converters connected in parallel are connected to the power supply or the capacitor through the wire, the coil is disposed at a position around the wire connecting the plurality of the power converters, a magnetic flux generated by the short-circuit failure being linked with the coil at the position.
2 . The power conversion system according to claim 1 , wherein the failure detection circuit detects the short-circuit failure of the power converter when the voltage value exceeds a predetermined threshold.
3 . The power conversion system according to claim 2 , wherein the control apparatus further includes an operation control circuit configured to, when the failure detection circuit detects the short-circuit failure of the power converter, output an operation instruction to protect and stop the power converter.
4 . The power conversion system according to claim 1 , wherein the control apparatus further includes an operation control circuit configured to, when the failure detection circuit detects the short-circuit failure of the power converter, output an operation instruction to protect and stop the power converter.
5 . The power conversion system according to claim 1 , wherein
when the voltage value exceeds a predetermined threshold, the failure detection circuit detects the short-circuit failure of the power converter, and
the control apparatus further includes an operation control circuit configured to, when the failure detection circuit detects the short-circuit failure of the power converter, output an operation instruction to protect and stop the power converter.
6 . The power conversion system according to claim 1 , wherein the wire is any of an electric wire, a busbar, and a printed-circuit board wire.
7 . The power conversion system according to claim 1 , wherein the coil is any of an electric wire, a busbar, and a printed-circuit board wire.
8 . The power conversion system according to claim 7 , wherein the coil is electrically insulated from a main circuit.
9 . The power conversion system according to claim 1 , wherein the coil is electrically insulated from a main circuit.