PATENT CLAIM ANALYSIS

Application Number: 16066653
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-01
Patent Classification: ["361", "042000"]

Abstract:
A direct current switch-off device comprises an on-state current branch circuit and a current commutating and breaking unit which are connected in parallel. The on-state current branch circuit has a mechanical switch (S) and a current transfer module which are connected in series. The current commutating and breaking unit comprises a bridge-type branch circuit and a current-breaking branch circuit. The current-breaking branch circuit and two bridge arms of the bridge-type branch circuit are connected in parallel. The current-breaking branch circuit comprises a nonlinear resistor (RI) and a valve group consisting of fully-controlled devices connected in series. The nonlinear resistor (RI) and the valve group are connected in parallel. Two ends of each fully-controlled device in the valve group are connected in parallel with a buffering and reclosing circuit.

Claim (Index 8):
A control method of a direct current switch-off device, characterized in that, comprising the following steps:\n 1) when a direct current system is operating normally, turning on a mechanical switch, such that fully-controlled devices in a current transfer module are in an on-state; and a steady-state current passes through the mechanical switch and the current transfer module which are connected in series in an on-state current branch circuit; 2) when a short-circuit failure occurs in the direct current system:\n 201. turning on a valve group consisting of fully-controlled devices connected in series in a current-breaking branch circuit, and blocking the fully-controlled devices in the current transfer module in the on-state current branch circuit; \n 202. after the current in the on-state current branch circuit is completely transferred to a bridge-type branch circuit and the current-breaking branch circuit, turning off the mechanical switch in the on-state current branch circuit; \n 203. after arc-free breaking of the mechanical switch, blocking the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit, such that fault current is transferred into a nonlinear resistor till the system energy is dissipated by the nonlinear resistor, and direct current breaker completes breaking; \n 3 ) when reclosing is performed after failure breaking:\n 301. turning on reclosing modules for the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit; 302. determining whether the faulty line is recovered;\n (1) if the line failure is not recovered, turning off the reclosing modules for the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit, and ending the reclosing; \n (2) if the line failure is recovered, turning on the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit, turning off the reclosing modules for the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit, and performing Step 303; \n 303. turning on the mechanical switch in the on-state current branch circuit and turning on the fully-controlled devices in the current transfer module in the on-state current branch circuit; 304. turning off the valve group consisting of fully-controlled devices connected in series in the current-breaking branch circuit, and ending the reclosing.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 94.0
- Lexical Diversity: 2.71154
- Patent Class: 361.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16086011', '15494166', '15119730', '15493635', '14368281']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8408097094192141
- 35 USC 102 Novelty (BERT): 0.5340441750576
- Combined Prediction Score: 0.8101331559830527
- Mean Citation Score: 265.748204
- Max Citation Score: 385.8646
- Similarity Product: 316.87026664974684

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test