Method and apparatus for transmitting electrical power

Patent metadata

Field	Value
Publication number	US-9876353-B2
Application number	US-201314436507-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Oct 17, 2012
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

The present invention relates to a method ( 40 ) for transmitting electrical power between an energy supply grid ( 16 ) and an energy consumer ( 12 ) or energy producer ( 12 ) which is coupled to the energy supply grid ( 16 ), wherein at least one electrical variable of the energy supply grid ( 16 ) is detected, wherein a discrepancy between the electrical variable and a rated variable of the energy supply grid ( 16 ) which is associated with the electrical variable is determined, wherein the power transmission is controlled on the basis of the discrepancy, and wherein the electrical variable is a mains frequency and/or a mains voltage of the energy supply grid ( 16 ) and the rated variable is a rated frequency and/or rated voltage of the energy supply grid ( 16 ).

First claim

The invention claimed is:

1. A method for transmitting electrical power between an energy supply grid and an energy consumer or energy generation unit coupled to the energy supply grid, the method comprising:
detecting a line frequency of the energy supply grid,
measuring a mains voltage of the energy supply grid,
determining a discrepancy between the line frequency and a rated frequency of the energy supply grid which is assigned to the line frequency,
defining a control range between a first and a second threshold value for the line frequency, the rated frequency being outside the control range,
controlling the power transmission within the control range on the basis of the discrepancy, and
when the discrepancy exceeds the control range, interrupting the power transmission on the basis of the measured mains voltage.

2. The method as claimed in claim 1 , wherein the transmitted power in the control range is decreased continuously as the discrepancy increases.

3. The method as claimed in claim 1 , wherein the transmitted power in the control range is increased continuously as the discrepancy decreases.

4. The method as claimed in claim 1 , wherein a second control range between a third and a fourth threshold value for the line frequency is defined in which the power transmission is changed on the basis of the line frequency, wherein the rated frequency is between the second control range and the first control range.

5. The method as claimed in claim 4 , wherein the transmitted power in the second control range is increased continuously as the discrepancy increases.

6. The method as claimed in claim 4 , wherein the transmitted power in the second control range is decreased continuously as the discrepancy decreases.

7. The method as claimed in claim 1 , wherein the threshold values for the line frequency are fixed on the basis of the rated frequency.

8. The method as claimed in claim 1 , wherein the rated frequency is determined on the basis of the detected line frequency.

9. The method as claimed in claim 1 , wherein the power is transmitted from the energy supply grid to the energy consumer, and wherein the first control range is defined below the rated frequency.

10. The method as claimed in claim 1 , wherein the power is transmitted from the energy generation unit to the energy supply grid, and wherein the first control range is defined above the rated frequency.

11. The method as claimed in claim 1 , wherein the control of the power transmission is switched off on the basis of an operating condition of the power transmission.

12. An apparatus for transmitting electrical power between an energy supply grid and an energy consumer or energy generation unit coupled to the energy supply grid, the apparatus comprising:
a detection unit for detecting a line frequency of the energy supply grid and a mains voltage of the energy supply grid,
an evaluation unit for determining a discrepancy between the line frequency and a rated frequency of the energy supply grid assigned to the line frequency, and
a control unit configured to
define a control range between a first and a second threshold value for the line frequency, the rated frequency being outside the control range,
control the power transmission within the control range on the basis of the discrepancy, and
when the discrepancy exceeds the control range, interrupting the power transmission on the basis of the measured mains voltage.

13. The apparatus as claimed in claim 12 , wherein a control range between a first and a second threshold value of the line frequency is defined, wherein the rated frequency is outside the control range, and wherein the control unit is designed to decrease the transmitted power in the control range continuously as the discrepancy increases.

Assignees

• Bosch Gmbh Robert

Inventors

• Eckert Bernd
• Krauter Gisbert
• Faye Ian

Classifications

• B60L53/65

  involving identification of vehicles or their battery types · CPC title

• Y02T90/14

  Plug-in electric vehicles · CPC title

• B60L53/52

  Wind-driven generators · CPC title

• Y04S30/14

  Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing · CPC title

• Y04S20/222

  Demand response systems, e.g. load shedding, peak shaving · CPC title