Station-building power-supply device and method of calculating regeneration determining voltage value

Patent metadata

Field	Value
Publication number	US-10351018-B2
Application number	US-201515523464-A
Country	US
Kind code	B2
Filing date	Feb 19, 2015
Priority date	Feb 19, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A station-building power-supply device includes: a detector that detects a ripple in an overhead line voltage and outputs information on the detected ripple and an overhead line voltage value; a determiner that compares the information with a threshold for determining whether a ripple is in the overhead line voltage, and outputs the overhead line voltage value obtained when a ripple is determined to be not in the overhead line voltage based on the comparison result; an estimator that estimates, based on the overhead line voltage value, a no-load voltage value of an overhead line in a no-load state; a controller that sets an additional value; and a calculator that adds the additional value to the no-load voltage value to calculate a regeneration determining voltage value for determining whether an electric vehicle performs regeneration, and outputs the regeneration determining voltage value to a circuit that utilizes energy generated by the regeneration.

First claim

The invention claimed is:

1. A station-building power-supply device comprising:
a ripple detector to detect a ripple included in an overhead line voltage and output information on the detected ripple;
a ripple determiner to compare the information on the ripple with a ripple threshold value for determining whether a ripple is included in the overhead line voltage, and output a ripple peak voltage obtained when a ripple is determined to be not included in the overhead line voltage, on a basis of a result of the comparison;
a no-load voltage estimator to obtain an effective value of the ripple to thereby estimate a no-load voltage value that is a voltage value of an overhead line obtained when the overhead line is in a no-load state, the effective value of the ripple having a peak that is the ripple peak voltage; and
a calculator to calculate a regeneration determining voltage value for determining whether an electric vehicle connected to the overhead line performs regenerative operation, and output the regeneration determining voltage value to a main circuit that utilizes regenerative energy generated by the regenerative operation, wherein
in calculating the regeneration determining voltage value, the calculator calculates the regeneration determining voltage value to be higher than the no-load voltage value by a predetermined value.

2. The station-building power-supply device according to claim 1 , comprising:
a voltage range setter to set a voltage range of the no-load voltage value; and
a voltage determiner to determine whether the no-load voltage value estimated by the no-load voltage estimator is within the voltage range set by the voltage range setter, and output the no-load voltage value to the calculator when the no-load voltage value is within the voltage range.

3. The station-building power-supply device according to claim 1 , wherein
the calculator records a plurality of the regeneration determining voltage values calculated during a predetermined period, and uses an average value of the recorded regeneration determining voltage values as the regeneration determining voltage value that is output to the main circuit.

4. The station-building power-supply device according to claim 1 , comprising:
a display to display information on the regeneration determining voltage value: and
a controller to control the display, wherein
the calculator records, for a plurality of days, a plurality of the calculated regeneration determining voltage values together with information on points of time at which the regeneration determining voltage values are calculated, uses the regeneration determining voltage values for the plurality of days to calculate regeneration determining voltage values at respective points of time for output to the main circuit, and automatically generates a schedule for regeneration determining voltage values in an operational time period of the electric vehicle, and
the controller performs control to display the schedule on the display.

5. The station-building power-supply device according to claim 4 , wherein
the calculator receives, via the controller, input of the regeneration determining voltage values at respective points of time in the operational time period of the electric vehicle, and generates a schedule for the regeneration determining voltage values in the operational time period of the electric vehicle on a basis of manual setting, and
the controller performs control to display, on the display, the schedule automatically generated by the calculator or the schedule generated on a basis of the manual setting.

6. A method of computing a regeneration determining voltage value, the method comprising:
detecting, a ripple included in an overhead line voltage and outputting information on the detected ripple;
comparing the information on the ripple with a ripple threshold value for determining whether a ripple is included in the overhead line voltage, and outputting a ripple peak voltage obtained when a ripple is determined to be not included in the overhead line voltage, on a basis of a result of the comparison;
obtaining an effective value of the ripple to thereby estimate, a no-load voltage value that is a voltage value of an overhead line obtained when the overhead line is in a no-load state, the effective value of the ripple having a peak that is the ripple peak voltage; and
calculating a regeneration determining voltage value for determining whether an electric vehicle connected to the overhead line performs regenerative operation, and outputting the regeneration determining voltage value to a main circuit that utilizes regenerative energy generated by the regenerative operation, wherein calculating the regeneration determining voltage value includes calculating the regeneration determining voltage value to be higher than the no-load voltage value by a predetermined value.

7. The method of calculating a regeneration determining voltage value according to claim 6 , the method comprising:
setting a voltage range of the no-load voltage value; and
determining whether the estimated no-load voltage value is within the set voltage range, and outputting the no-load voltage value for use in calculating the regeneration determining voltage value when the no-load voltage value is within the voltage range.

8. The method of computing a regeneration determining voltage value according to claim 6 , wherein
calculating the regeneration determining voltage value includes recording a plurality of the regeneration determining voltage values calculated during a predetermined period, and using an average value of the recorded regeneration determining voltage values as the regeneration determining voltage value that is output to the main circuit.

9. The method of calculating a regeneration determining voltage value according to claim 6 , wherein
calculating the regeneration determining voltage value includes recording, for a plurality of days, a plurality of the calculated regeneration determining voltage values together with information on points of time at which the regeneration determining voltage values are calculated, and using the regeneration determining voltage values for the plurality of days to calculate regeneration determining voltage values at respective points of time for output to the main circuit, and
the method further comprises:
automatically generating a schedule for regeneration determining voltage values in an operational time period of the electric vehicle; and
performing control to display the schedule on a display.

10. The method of calculating a regeneration determining voltage value according to claim 9 , wherein
generating the schedule includes receiving input of the regeneration determining voltage values at respective points of time in the operational time period of the electric vehicle, and generating a schedule for the regeneration determining voltage values in the operational time period of the electric vehicle on a basis of manual setting, and
performing the control to display the schedule on the display includes performing control to display, on the display, the automatically generated schedule or the schedule generated on a basis of the manual setting.

Assignees

• Mitsubishi Electric Corp

Inventors

• Katsumata Hisashi
• Matsumura Yasushi

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02M7/797

  using semiconductor devices only · CPC title

• B60L2200/26

  Rail vehicles · CPC title

• Y02T10/7055

  Cross-Sectional Technologies · mapped topic

• B60M3/06 Primary

  Arrangements for consuming regenerative power · CPC title