ELECTRIC POWER SELLING SYSTEM

• US 20110095616A1
• Filed: 10/20/2010
• Published: 04/28/2011
• Est. Priority Date: 10/26/2009
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: MATSUDA, Takehiro
• Granted Patent: US 8,823,213 B2
• Time in Patent Office: Days
• US Class Current: 307/84
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/123 the energy generation units being or involving renewable energy sources
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

It is an object of the present invention to suppress such a situation that electric power selling becomes impossible while the deterioration of supply power is prevented. The electric power selling system of the present invention comprises a solar battery 3 as a power generator, and a control unit 7 which is connected with the solar battery 3 and a distribution line and configured to convert output voltage of the solar battery 3 into variable voltage for electric power selling. The electric power selling system further comprises a transmitter 60 connected with the distribution line, said transmitter 60 being configured to measure voltage of the distribution line and to supply the control unit 7 with an instruction value obtained based on the measured voltage value. The control unit 7 is configured to convert the output voltage of the solar battery 3 into the voltage for electric power selling based on the instruction value.

Claims

1. An electric power selling system comprising:

a power generator; and

a voltage conversion device which is connected with the power generator and a distribution line and configured to convert output voltage of the power generator into variable voltage for electric power selling,

wherein the electric power selling system further comprises a transmitter connected with the distribution line, said transmitter being configured to measure voltage of the distribution line and to supply the voltage conversion device with an instruction value obtained based on the measured voltage value,

wherein the voltage conversion device is configured to convert the output voltage of the power generator into the voltage for electric power selling based on the instruction value.

2. The electric power selling system as set forth in claim 1,

wherein the power generator comprises a plurality of power generators, each of which is configured to generate electric power capable of electric power selling,

wherein the voltage conversion device comprises a plurality of voltage conversion devices, which are connected with the power generators, respectively, and the distribution line, each of said voltage conversion devices being configured to convert output voltage as generated power voltage of the generator into voltage for electric power selling, capable of electric power selling,

wherein the distribution line is a low-tension distribution line connected with the plurality of voltage conversion devices,

wherein the transmitter is configured to supply the voltage conversion devices with the measured voltage value as the instruction value,

wherein each of the voltage conversion devices is configured to decide the voltage for electric power selling based on the measured voltage value.

3. The electric power selling system as set forth in claim 2, further comprising a plurality of electric energy measurement devices for measuring electric energy to be sold,

wherein the transmitter supplies the voltage conversion devices with the measured voltage value via the plurality of electric energy measurement devices, respectively.

4. The electric power selling system as set forth in claim 3,

wherein the transmitter and the electric energy measurement devices are connected by power lines for electric power selling, respectively,

wherein the transmitter supplies the electric energy measurement devices with the measured voltage value through the power lines, respectively.

5. The electric power selling system as set forth in claim 3,

wherein the electric energy measurement devices and the voltage conversion devices are connected by power lines for electric power selling, respectively,

wherein the electric energy measurement devices transmit the measured voltage value to the voltage conversion devices through the power lines, respectively.

6. The electric power selling system as set forth in claim 1, comprising a plurality of electric power supplying systems,

wherein the power generator comprises a plurality of power generators included in the plurality of electric power supplying systems, respectively,

wherein the voltage conversion device comprises a plurality of voltage conversion devices included in the plurality of electric power supplying systems, respectively, each of the plurality of voltage conversion devices being connected with its own power generator and the distribution line,

wherein each of the voltage conversion devices of the electric power supplying systems converts output voltage of its own power generator into identical voltage for electric power selling based on the instruction value supplied from the transmitter.

7. The electric power selling system as set forth in claim 1,

wherein the transmitter periodically supplies the voltage conversion device with the measured voltage value as the instruction value,

wherein the voltage conversion device has different target voltage values, said voltage conversion device being configured, when receiving the measured voltage value, to select a target voltage value which is higher than and closest to the measured voltage value and to convert the output voltage of the power generator into the voltage for electric power selling based on the selected target voltage value.

8. The electric power selling system as set forth in claim 1,

wherein the transmitter has different target voltage values, said transmitter being configured to select a target voltage value which is higher than and closest to the measured voltage value and to supply the voltage conversion device with the selected target voltage value as the instruction value,

wherein the voltage conversion device is configured to convert the output voltage of the power generator into the voltage for electric power selling based on the received target voltage value.

9. The electric power selling system as set forth in claim 8,

wherein the transmitter is configured, when measured voltage value is less than a predetermined maximum target voltage value, and if the measured voltage value reaches the present target voltage value, to select another target voltage value which is higher than and closest to the measured voltage value and to supply the voltage conversion device with said another target voltage value,

wherein the voltage conversion device is configured to convert the output voltage of the power generator into another voltage for electric power selling based on said another target voltage value.

10. The electric power selling system as set forth in claim 8,

wherein the transmitter is configured, if measured voltage value becomes more than a predetermined value smaller than the present target voltage value, to select another target voltage value which is higher than and closest to the measured voltage value and to supply the voltage conversion device with said another target voltage value,

wherein the voltage conversion device is configured to convert the output voltage of the power generator into another voltage for electric power selling based on said another target voltage value.

11. The electric power selling system as set forth in claim 8,

wherein the transmitter is configured, if measured voltage value becomes more than a predetermined value larger than the present target voltage value, to select another target voltage value which is higher than and closest to the measured voltage value and to supply the voltage conversion device with said another target voltage value,

wherein the voltage conversion device is configured to convert the output voltage of the power generator into another voltage for electric power selling based on said another target voltage value.

12. The transmitter used for the electric power selling system according to claim 1.

13. The electric power selling system as set forth in claim 4,

wherein the electric energy measurement devices and the voltage conversion devices are connected by power lines for electric power selling, respectively,

wherein the electric energy measurement devices transmit the measured voltage value to the voltage conversion devices through the power lines, respectively.