Mechatronic Circuit Breaker Device And Associated Tripping Method And Use Thereof In Interrupting A High Direct Current
First Claim
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1. A mechatronic circuit-breaker device adapted to break an electrical current flowing through electrical power transmission means, the device comprising:
- a main branch comprising at least one main module comprising at least one sub-branch comprising at least one mechanical switch-disconnector connected in series with at least one breaker cell constituted of at least one power semiconductor element with controlled duty ratio;
an auxiliary branch electrically in parallel with the main branch and comprising;
at least one first sub-branch, called the timing sub-branch, and comprising at least one first breaker cell comprising a plurality of power thyristors in cascade, at least one of the timing sub-branches further comprising at least one first switching-assistance module with at least one first capacitor, electrically in parallel with its discharge resistance and a voltage surge limiter; and
a second sub-branch, called the arming sub-branch, electrically in parallel with the timing sub-branch and comprising at least one second breaker cell constituted of a plurality of power thyristors in cascade and at least one second switching-aid module with at least one second capacitor electrically in parallel with its discharge resistor; and
at least one main voltage surge limiter electrically in parallel with the main branch.
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Abstract
The invention relates to a new mechatronic circuit-breaker and its associated triggering method for breaking either alternating currents or direct currents at high voltages.
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Citations
22 Claims
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1. A mechatronic circuit-breaker device adapted to break an electrical current flowing through electrical power transmission means, the device comprising:
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a main branch comprising at least one main module comprising at least one sub-branch comprising at least one mechanical switch-disconnector connected in series with at least one breaker cell constituted of at least one power semiconductor element with controlled duty ratio; an auxiliary branch electrically in parallel with the main branch and comprising; at least one first sub-branch, called the timing sub-branch, and comprising at least one first breaker cell comprising a plurality of power thyristors in cascade, at least one of the timing sub-branches further comprising at least one first switching-assistance module with at least one first capacitor, electrically in parallel with its discharge resistance and a voltage surge limiter; and a second sub-branch, called the arming sub-branch, electrically in parallel with the timing sub-branch and comprising at least one second breaker cell constituted of a plurality of power thyristors in cascade and at least one second switching-aid module with at least one second capacitor electrically in parallel with its discharge resistor; and at least one main voltage surge limiter electrically in parallel with the main branch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A set of electrical switchgear intended to be installed in high-voltage alternating current or direct current electrical energy transmission means, comprising a mechatronic circuit-breaker according to claim and at least one electrical grounding switch connected in series with each of the two terminals of the mechatronic circuit-breaker.
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20. A method triggering a mechatronic circuit-breaker device wherein only in the presence of a steady current in the main branch, and in the absence of a specific instruction, each switch-disconnector is maintained in the closed position and the set or sets of controlled duty ratio power semiconductors in the ON state and the set of power thyristors of the auxiliary branch in the OFF state, and wherein either in the event of a current surge in the main branch of the device or on reception of a specific instruction, it comprises the following steps:
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a) switching from the ON state to an OFF state of the controlled duty ratio power semiconductor element or elements whilst maintaining each switch-disconnector closed so as to divert all of the current into the at least one timing sub-branch for a time period necessary for each mechanical switch-disconnector to open; b) synchronously with the step a), switching power thyristors of at least one timing sub-branch from the OFF state to an ON state to achieve a voltage level at the terminals of the main branch and of the auxiliary branch enabling current to flow neither in the main branch nor in the arming branch nor in the voltage surge limiter, to enable subsequent switching from the OFF state to an ON state of the power thyristors of the arming branch in the open position of each mechanical switch-disconnector, and allowing subsequent switching from the ON state to the OFF state of the power thyristors of the at least one timing sub-branch in the open position of each mechanical switch-disconnector; c) when step b) has been completed, opening each mechanical switch-disconnector; d) when step c) has been completed and when mechanical switch-disconnector has reached its open position, switching the power thyristors of the arming sub-branch from the OFF state to an ON state to achieve a voltage level at its terminals enabling diversion of all of the current to the voltage surge limiter or limiters; e) extinction of the current by the main voltage surge limiter or limiters. - View Dependent Claims (21)
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22. (canceled)
Specification