| 摘要 |
<p>A digital protection control device 9 that acquires a bus voltage by using data from a protection control terminal 8 that converts a voltage detected by a voltage transformer 7 arranged on a plurality of lines 3, a state of a circuit breaker 4 arranged on each of the lines 3, and a state of a disconnector 5, 6 arranged on each of the lines 3 into digital data, includes a simulated-bus-voltage selecting unit that, on a basis of voltage data related to the voltage, data related to the state of the circuit breaker 4, and data related to the state of the disconnector 5, 6, selects the voltage data as a simulated bus voltage that is a simulated value of the bus voltage; and a synchronism indicator that detects whether the voltage data and the simulated bus voltage are in a synchronized state and outputs information C1 to Cn indicating a synchronized state to the protection control terminal 8.</p> |
