Power system and method for earth detection and calibration of power meter

Abstract

A power system and method for grounding detection calibration of an electricity meter. The power system includes a power supply module, an inverter module, a sensing module, a control module, and an input module. When the grounding detection indicator of the electricity meter is lit, the control module enters a grounding detection calibration setting mode and stores a calibration setting value input by the input module under the current operating conditions. The control module then adjusts the inverter module accordingly based on the stored calibration setting value to extinguish the grounding detection indicator of the electricity meter.

Claims

1. A power system for grounding detection calibration of an electricity meter, applicable to an electricity meter connected to mains power and having a grounding detection indicator, comprising: a power supply module for supplying power; an inverter module for inverting power, the inverter module being electrically coupled to the power supply module and electrically coupled to the mains power and a load; a sensing module for sensing, the sensing module being electrically coupled to the power supply module, the inverter module, the mains power, and the load; a control module for control, the control module being electrically coupled to the sensing module and the inverter module; and an input module for input, the input module being electrically coupled to the control module; wherein... When the ground detection indicator light on the power meter illuminates, the control module enters a ground detection calibration setting mode based on an input signal from the input module. In this mode, the control module determines which of several operating conditions the power system is currently operating under based on a sensing result generated by the sensing module. The control module stores a calibration setting value input by the input module corresponding to the operating condition under which the power system is currently operating. The control module then performs calibration based on the stored calibration setting value to adjust the AC power output from the inverter module accordingly. While the ground detection indicator light on the power meter remains illuminated, the control module stores and performs calibration based on the next calibration setting value input by the input module until the ground detection indicator light on the power meter goes out.

2. The power system for grounding detection and calibration of power meters as described in claim 1 further includes a switching module, wherein the control module is electrically coupled to the switching module, and the inverter module is electrically coupled to the mains power and the load through the switching module; wherein, The switching module includes a first switch and a second switch connected to each other, the first switch and the second switch being selectively turned on according to the instruction of the control module, so as to selectively transmit at least one of the AC power output from the mains power and the AC power inverted by the inverter module to the load.

3. The power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The sensing module includes a first sensing circuit, and the sensing result of the sensing module includes the sensing result generated by the first sensing circuit sensing the mains power.

4. The power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The sensing module includes a second sensing circuit, and the sensing result of the sensing module includes the sensing result generated by the second sensing circuit sensing the power supply module.

5. A power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The sensing module includes a third sensing circuit, and the sensing result of the sensing module includes the result generated by the third sensing circuit sensing the inverter module.

6. A power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The sensing module includes a fourth sensing circuit, and the sensing result of the sensing module includes the result generated by the fourth sensing circuit sensing the load.

7. A power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The power supply module includes at least one of a solar power supply module and a battery power supply module.

8. A power system for grounding detection calibration of electricity meters as described in claim 7, wherein, A boost module is connected between the solar power module and the inverter module. The boost module is used to boost the DC power output by the solar power module before outputting it.

9. A power system for grounding detection calibration of electricity meters as described in claim 7, wherein, A charge-discharge conversion module is connected between the battery power supply module and the inverter module. The control module is electrically coupled to the charge-discharge conversion module, and the control module controls the charging and discharging operation of the battery power supply module through the charge-discharge conversion module.

10. A power system for grounding detection calibration of electricity meters as described in claim 1, wherein, The control module is electrically coupled to a display module. In the grounding detection calibration setting mode, the control module controls the display module to display a code corresponding to one of the operating conditions of the power system and the calibration setting value.

11. The power system for grounding detection calibration of electricity meters as described in claim 10, wherein, In the grounding detection calibration setting mode, the control module controls the display module to display a grounding calibration setting item page, so that the display module displays the code and the calibration setting value through the grounding calibration setting item page.

12. A power system for grounding detection calibration of electricity meters as described in claim 1, wherein, In the grounding detection calibration setting mode, the control module determines whether the power system is operating in mains power supply mode, battery presence mode, or solar presence mode based on the sensing results generated by the sensing module, and further determines the battery supply energy, solar supply energy, load power consumption, AC charging current value, or predetermined system model of the power system, thereby determining which of the various operating conditions the power system is currently operating under.

13. A calibration method for a power system for ground detection calibration of an electricity meter, applicable to an electricity meter connected to mains power and having a ground detection indicator, comprising the following steps: When the ground detection indicator of the electricity meter is lit, a control module enters a ground detection calibration setting mode according to an input signal input by an input module; In the ground detection calibration setting mode, the control module determines which of a variety of operating conditions the power system is currently operating under based on a sensing result generated by a sensing module; The control module stores a calibration setting value input by the input module corresponding to the power system currently operating under one of the operating conditions; The control module performs a calibration step according to the stored calibration setting value to correspondingly adjust the AC power output by an inverter module; and while the ground detection indicator of the electricity meter is still lit, the control module stores the next calibration setting value input by the input module and performs the aforementioned calibration step until the ground detection indicator of the electricity meter is extinguished.

14. The calibration method for a power system for grounding detection calibration of electricity meters as described in claim 13, wherein, In the grounding detection calibration setting mode, the control module controls a display module to display the code corresponding to one of the operating conditions of the power system and the calibration setting value.

15. A calibration method for a power system for grounding detection calibration of electricity meters as described in claim 14, wherein, In the grounding detection calibration setting mode, the control module controls the display module to display a grounding calibration setting item page, so that the display module displays the code and the calibration setting value through the grounding calibration setting item page.

16. A calibration method for a power system for grounding detection calibration of electricity meters as described in claim 13, wherein, In the grounding detection calibration setting mode, the control module determines whether the power system is operating in mains power supply mode, battery presence mode, or solar presence mode based on the sensing results generated by the sensing module, and further determines the battery supply energy, solar supply energy, load power consumption, AC charging current value, or predetermined system model of the power system, thereby determining which of the various operating conditions the power system is currently operating under.

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