Home energy control system and controlling method thereof

Patent metadata

Field	Value
Publication number	US-9543761-B2
Application number	US-201113581095-A
Country	US
Kind code	B2
Filing date	Mar 30, 2011
Priority date	Mar 31, 2010
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A method of controlling a home energy control system includes controlling the system to run in at least one of a new energy generating mode, a grid-connected inverter mode and an off-grid inverter mode after mode conflict check. In the new energy generating mode, a new energy generating unit is controlled to generate power to charge an energy storage unit. In the grid-connected inverter mode, the energy storage unit supplies power to a power grid or is charged by the power grid according to the status of the energy storage unit and power consumption of the power grid. In the off-grid inverter mode, household devices are supplied with power from the energy storage unit according to the status of the energy storage unit under the control of an off-grid inverter. A home energy control system is also provided.

First claim

What is claimed is:

1. A method of controlling a home energy control system, comprising the steps of controlling the system to run in at least one of the following modes: a new energy generating mode, a grid-connected inverter mode and an off-grid inverter mode after mode conflict check, wherein
A) in the new energy generating mode, a new energy generating unit is controlled to generate power to charge an energy storage unit;
B) in the grid-connected inverter mode, the energy storage unit supplies power to a power grid or is charged by the power grid via a grid-connected inverter according to the status of the energy storage unit and power consumption of the power grid; and
C) in the off-grid inverter mode, household devices are supplied with power from the energy storage unit according to the status of the energy storage unit under the control of an off-grid inverter,
wherein the method further comprises a step of:
controlling the system to run in a manual operating mode, wherein
D) in the manual operating mode, if manual modulation is desired, the energy storage unit, the grid-connected inverter, the off-grid inverter and the new energy generating unit are modulated manually; and if no manual modulation is desired, at least one of the grid-connected inverter mode, the off-grid inverter mode and the new energy generating mode is executed after the mode conflict check;
wherein when running in the manual operating mode,
if the manual modulation conflicts with the new energy generating mode, the manual modulation is executed and the new energy generating mode is stopped, otherwise, the manual modulation and the new energy generating mode are executed simultaneously;
if the manual modulation conflicts with the grid-connected inverter mode, the manual modulation is executed and the grid-connected inverter mode is stopped, otherwise the manual modulation and the grid-connected inverter mode are executed simultaneously; and
if the manual modulation conflicts with the off-grid inverter mode, the manual modulation is executed and the off-grid inverter mode is stopped, otherwise the manual modulation and the off-grid inverter mode are executed simultaneously,
in which the conflict between the manual modulation and the new energy generating mode, the grid-connected inverter mode or the off-grid inverter mode means that the manual modulation is identical with the new energy generating mode, the grid-connected inverter mode or the off-grid inverter mode, or influences the new energy generating mode, the grid-connected inverter mode or the off-grid inverter mode.

2. The method according to claim 1 further comprising a step of controlling the system to run in a fault determining mode in which it is determined whether the temperature, the humidity, the voltage, SOC of the energy storage unit is normal before the grid-connected mode, the off-grid inverter mode and/or the new energy generating mode are executed;
wherein in the fault determining mode, if it is determined that there is a fault in the energy storage unit, the control system is stopped, otherwise at least one of the grid-connected mode, the off-grid inverter mode and the new energy generating mode is executed.

3. The method according to claim 1 , wherein when the system is controlled to run in the grid-connected mode, if it is determined that the power grid is in a high peak, the energy storage unit supplies power to the power grid intermittently or continuously under the control of the grid-connected inverter based on the current SOC of the energy storage unit, otherwise if the power grid is in a low peak, the energy storage unit is charged by the power grid intermittently or continuously under the control of the grid-connected inverter based on the current SOC of the energy storage unit; or
when in the off-grid inverter mode, if it is determined that there is no fault in the temperature, the humidity, the voltage and SOC of the energy storage unit, the household devices are powered by the energy storage unit under the control of the off-grid inverter, otherwise the household devices are powered by the power grid under the control of the off-grid inverter.

4. The method according to claim 3 , wherein when the power grid is in a high peak and the current SOC of the energy storage unit is greater than the a first preset value SOC min , the energy storage unit charges the power grid under the control of the grid-connected inverter, otherwise the energy storage unit is charged by the power grid intermittently under the control of the grid-connected inverter until the current SOC of the energy storage unit is greater than the first preset value SOC min .

5. The method according to claim 3 , wherein when the power grid is in a low peak and the current SOC of the energy storage unit is smaller than a second preset value SOC max which is larger than the first preset value SOC min , the energy storage unit is charged by the power grid under the control of the grid-connected inverter; and
when the power grid is in a low peak and the current SOC of the energy storage unit is not smaller than the second preset value SOC max , the energy storage unit supplies power intermittently to the power grid under the control of the grid-connected inverter.

6. The method according to claim 1 , wherein the household devices are switched to be powered from the energy storage unit to the power grid under the control of the off-grid inverter when the current SOC of the energy storage unit is lower than a third preset value SOC low which is smaller than the first preset value SOC min .

7. A home energy control system, comprising:
an energy storage unit configured to store energy;
a grid-connected inverter connected with the energy storage unit which is configured to transmit power from the energy storage unit to a power grid and/or transmit power from the power grid to the energy storage unit;
an off-grid inverter configured to transmit power from the energy storage unit to household devices;
a new energy generating unit configured to generate power domestically to charge the energy storage unit; and
a controller connected with the energy storage unit, the grid-connected inverter, the new energy generating unit, and the off-grid inverter respectively, the controller being configured to control the energy storage unit, the grid-connected inverter, the off-grid inverter and the new energy generating unit to run in a grid-connected mode, an off-grid inverter mode and/or a new energy generating mode respectively, wherein the controller is further configured to run the system in a manual operating mode;
if the manual modulation conflicts with the new energy generating mode, the manual modulation is executed and the new energy generating mode is stopped by the controller, otherwise, the manual modulation and the new energy generating mode are executed simultaneously;
if the manual modulation conflicts with the grid-connected inverter mode, the manual modulation is executed and the grid-connected inverter mode is stopped by the controller, otherwise the manual modulation and the grid-connected inverter mode are executed simultaneously; and
if the manual modulation conflicts with the off-grid inverter mode, the manual modulation is executed and the off-grid inverter mode is stopped by the controller, otherwise the manual modulation and the off-grid inverter mode are executed simultaneously,
wherein the conflict between the manual modulation and the new energy generating mode, the grid-connected inverter mode or the off-grid inverter mode means that the manual modulation is identical with the new energy generating mode, the grid-connected inverter mode or the off-grid inverter mode, or influences the new energy generating mode, the grid-connected inve

Assignees

• Li Bo
• Shen Xiaofeng
• Zhang Jianhua
• Shenzhen Byd Auto R&D Co Ltd
• Byd Co Ltd

Inventors

• Li Bo
• Shen Xiaofeng
• Zhang Jianhua

Classifications

• H02J2207/40

  adapted for charging from various sources, e.g. AC, DC or multivoltage · CPC title

• H02J7/35

  with light sensitive cells · CPC title

• H02J3/32 Primary

  using batteries or super capacitors with converting means · CPC title

• H02J7/0055

  Electricity · mapped topic