An energy management system that includes a power generation apparatus that outputs generated electric power to a HVDC bus, a bidirectional DC-DC converter to which a DC voltage is input from the HVDC bus or outputting a DC voltage to the HVDC bus, and an inverter that converts a DC voltage inputted
An energy management system that includes a power generation apparatus that outputs generated electric power to a HVDC bus, a bidirectional DC-DC converter to which a DC voltage is input from the HVDC bus or outputting a DC voltage to the HVDC bus, and an inverter that converts a DC voltage inputted from the HVDC bus to an AC voltage. A calibration value is set to the highest voltage among voltages of the HVDC bus each detected by the power generation apparatus, the bidirectional DC-DC converter, and the inverter, other detection voltages are calibrated with the calibration value. Then, each of the power generation apparatus, the bidirectional DC-DC converter, and the inverter carry out switching control such that the detection voltage after the calibration match with a target value.
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1. An energy management system comprising: a DC voltage bus;a power generator connected to the DC voltage bus and configured to output a generated electric power to the DC voltage bus;a bidirectional DC-DC converter connected to the DC voltage bus and configured to receive a DC voltage from the DC v
1. An energy management system comprising: a DC voltage bus;a power generator connected to the DC voltage bus and configured to output a generated electric power to the DC voltage bus;a bidirectional DC-DC converter connected to the DC voltage bus and configured to receive a DC voltage from the DC voltage bus or output a DC voltage to the DC voltage bus; andan inverter connected to the DC voltage bus and configured to convert the DC voltage received from the DC voltage bus to an AC voltage,wherein each of the power generator, the bidirectional DC-DC converter, and the inverter includes a voltage detector configured to detect a voltage of the DC voltage bus and a switching controller configured to perform switching control such that the voltage detected by the respective voltage detector matches a target value,wherein the energy management system further comprises:a calibration value selector configured to compare the voltages detected by the respective voltage detectors and to set a calibration value to a highest voltage of the detection voltages; anda calibrator configured to calibrate the detection voltages of the voltage detectors with the set calibration value. 2. The energy management system according to claim 1, wherein the calibrator excludes calibration of the voltage detector that detected the highest voltage. 3. The energy management system according to claim 1, further comprising a controller area network, with each of the power generator, the bidirectional DC-DC converter, and the inverter being connected to the controller area network for communication thereon. 4. The energy management system according to claim 1, further comprising a controller configured to set a timing when voltage fluctuations of the DC voltage bus are minimized in a predetermined period. 5. The energy management system according to claim 4, wherein the calibrator calibrates at the timing set by the controller. 6. The energy management system according to claim 5, wherein the voltage fluctuations of the DC voltage bus are minimized when the voltage fluctuations are within ±10 volts over the predetermined period. 7. The energy management system according to claim 1, further comprising: a temperature sensor configured to detect an ambient temperature; anda temperature corrector configured to correct the detection voltage by the respective voltage detectors based on the temperature detected by the temperature sensor. 8. The energy management system according to claim 7, wherein each of the power generator, the bidirectional DC-DC converter, and the inverter includes a temperature compensator that includes the temperature sensor configured to detect the ambient temperature of the power generator, the bidirectional DC-DC converter, and the inverter, respectively. 9. The energy management system according to claim 8, wherein each respective temperature compensator is configured to adjust the detection voltage detected by the voltage detector based on the detected ambient temperature, respectively. 10. The energy management system according to claim 1, wherein the power generator includes an optical power generation panel and a photovoltaic converter configured to output the generated electric power to the DC voltage bus. 11. An energy management system comprising: a power generator configured to generate and output electric power to a DC voltage bus;a bidirectional DC-DC converter configured to receive a DC voltage from the DC voltage bus or output a DC voltage to the DC voltage bus;an inverter configured to receive the DC voltage from the DC voltage bus and convert the DC voltage to an AC voltage;a calibration value selector configured to compare voltages detected by respective voltage detectors of each of the power generator, the bidirectional DC-DC converter, and the inverter, and to select a highest detected voltage as a calibration value; anda calibration unit configured to calibrate the detected voltages of the respective voltage detectors based on the set calibration value. 12. The energy management system according to claim 11, wherein each of the power generator, the bidirectional DC-DC converter, and the inverter further includes a switching controller configured to perform switching control of the power generator, the bidirectional DC-DC converter, and the inverter, respectively, such that the voltage detected by the respective voltage detectors matches a target value. 13. The energy management system according to claim 12, wherein the calibration unit excludes calibration of the respective voltage detector that detected the highest voltage. 14. The energy management system according to claim 11, wherein each of the power generator, the bidirectional DC-DC converter, and the inverter includes a temperature compensator that includes a temperature sensor configured to detect a respective ambient temperature of the power generator, the bidirectional DC-DC converter, and the inverter. 15. The energy management system according to claim 14, wherein each respective temperature compensator is configured to adjust the detected voltage detected by the respective voltage detector based on the detected ambient temperature, respectively. 16. An energy management method comprising: generating and outputting, by a power generator, electric power to a DC voltage bus;converting, by a bidirectional DC-DC converter, a DC voltage received from the DC voltage bus by stepping up or stepping down the received DC voltage;converting, by an inverter, the DC voltage received from the DC voltage bus to an AC voltage;comparing voltages detected by respective voltage detectors of each of the power generator, the bidirectional DC-DC converter, and the inverter;selecting a highest detected voltage as a calibration value based on the compared detected voltages; andcalibrating the detected voltages of the respective voltage detectors based on the set calibration value. 17. The energy management method according to claim 16, further comprising performing switching control of the power generator, the bidirectional DC-DC converter, and the inverter, respectively, such that the voltage detected by the respective voltage detectors matches a target value. 18. The energy management system according to claim 17, further comprising excluding calibration of the respective voltage detector that detected the highest voltage. 19. The energy management system according to claim 16, further comprising detecting, by a temperature compensator of each of the power generator, the bidirectional DC-DC converter, and the inverter, a respective ambient temperature of the power generator, the bidirectional DC-DC converter, and the inverter. 20. The energy management system according to claim 19, further comprising adjusting, by each respective temperature compensator, the detected voltage detected by the respective voltage detector based on the detected ambient temperature, respectively.
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