TWI423551B - Smart operation mode switcher of power system - Google Patents

Description

Smart Power System Operating Mode Switcher

The invention relates to a smart switch, in particular to a power system operation mode switching, in particular to a smart power system operation mode switch.

With the development of science and technology, the use and occupancy rate of various types of new energy power generation facilities is increasing. However, the design of related power generation facilities is now connected with the mains power line. Once the mains power is interrupted, all new energy power generation facilities need to be shut down, forming a The waste of resources also makes new energy power generation facilities not be used as backup power. Only through proper switching and control technology, new energy systems can provide energy safely and steadily without restrictions, and through intelligent The mode switcher is the best way to achieve this.

Under the traditional framework, such as the multi-function cross-control switch device of the Republic of China Patent No. M403164, in conjunction with the figure 2, it is only used with the traditional relay switch with external control devices to achieve interconnection control. It is convenient for personnel to control and save power. However, it can't detect the mains, nor can it control the parallel/independent operation mode switching between the power generation unit and the regenerative energy. Therefore, it cannot be applied to the power network, and it is not helpful for system stability.

Taking the power switching device of the Republic of China Patent No. M395964 as an example, in conjunction with the second diagram of the drawing, the invention can be operated by the user in the case of normal power supply, and the power supply abnormality occurs in the mains system. In this case, it is also possible to select one of the plurality of backup power sources to achieve the purpose of effectively extending the power supply time of the standby power source; however, it still cannot consider the instability caused by the system switching, and cannot perform the load characteristics. Different power supply system operation decisions, so can not make effective use of energy, can not improve system stability.

In addition, the "Interface switch for distributed energy resources" of U.S. Patent No. 7,521,825, in conjunction with Fig. 3 of the drawings, switches switching operations for conditions such as voltage and phase angle of commercial power and distributed power generation facilities, and switching conditions. Including protection events, IEEE1547 events and power quality events, but its invention can not communicate and control the power generation facilities, energy storage systems and loads, so it can not be properly scheduled to achieve the goal of maintaining power system stability.

It can be seen from the above that the conventional technology only considers the simple switching of the small electric appliance or the distributed power source, and cannot be used in the electric power system, thereby achieving the purpose of stabilizing the electric power system and improving the energy utilization rate, so that the general practitioner cannot meet the actual use of the user. .

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide a

For the purpose of the above, the present invention is an intelligent power system operation mode switcher, which is combined with a power generation device, a renewable energy source, a load and an energy storage system to form a small power system, the power generation device, the renewable energy source, The load and the energy storage system are electrically connected to a mains by a power line operating mode switch. The intelligent power system operation mode switcher of the present invention comprises at least a mains sensing unit, a communication unit, a load detecting unit, an arithmetic unit and a control mode switching unit. The utility model is connected to the utility power through a detection line for detecting the power supply state of the utility power; the communication unit is connected to the power generation device, the renewable energy source, the load and the energy storage device through a communication line a system connection for notifying the power generation device, the regenerative energy, the load, and the energy storage system in an operation mode after the calculation and the judgment; the load detection unit is connected to the load through a load control line for sensing Detecting the operating state of the load; the computing unit is connected to the mains sensing unit, the communication unit, and the load detecting unit for processing signals transmitted by the utility sensing unit and the load detecting unit to determine the mains Whether an abnormality occurs and whether the load can be temporarily powered off, and after all the data are integrated, the data data is authenticated and transmitted; and the control mode switching unit is connected to the computing unit, according to the data, A control line provides relevant control parameters and signals to the power generating device and the energy storage system to switch the operating mode to a load One of the modes of the power-off mode and the load non-transient power-off mode; thereby, the intelligent power system operation mode switcher of the present invention can be controlled to be connected or disconnected from the mains, and the mains failure detection , power generation unit parallel/independent operation mode switching sequence control, regenerative energy parallel/independent operation mode switching sequence control, and energy storage system parallel/independent operation mode switching sequence control and charge and discharge control.

In a preferred embodiment, the load may be in a short power-off mode, and the intelligent power system operating mode is switched by the load detecting unit sensing that the load is in a state of acceptable short-term power failure without affecting operation. The utility device disconnects the commercial power at the initial stage of the fault, and controls the power generating device to establish the voltage required for the operation of the system through the control line, and then the power generating device continues to supply power to the load in an independent operation manner, and the energy storage system has a large change in the power generation amount. The renewable energy adjusts the output to maintain the stability of the power system.

In a preferred embodiment, the load is not in a short-term power-off mode, and the control mode of the smart power system operating mode switch is detected by the load detecting unit being in an unacceptable short-term power-off state. The switching unit notifies the energy storage system to establish the voltage required for the operation of the system after the fault occurs, and then disconnects the commercial power, and the energy storage system supplies the load in an independent operation manner, and the power generating device continues to operate in the parallel mode. The energy storage system adjusts the output of the renewable energy with a large change in power generation at any time to maintain the stability of the power system; if the utility power has not recovered after the energy storage system has been operated for a certain period of time, the control of the intelligent power system operation mode switcher The mode switching unit notifies the power generating device to switch to the independent operation mode through the control line, and establishes the voltage required for the system operation, and then notifies the energy storage system to switch to the parallel mode. At this time, the power generating device is required to establish the voltage required for the system operation. The energy storage system adjusts the output of the renewable energy with a large change in power generation to maintain the power system. Stable.

Please refer to FIG. 1 and FIG. 2, which are respectively schematic diagrams of the intelligent power system operation mode switcher and small power system architecture of the present invention, and the operational flow diagram of the present invention. As shown in the figure, the present invention is a smart power system operation mode switcher 10, which is combined with a power generation device 20, a regenerative energy source 30, a load 40 and an energy storage system 50 to form a small power system 100. 20. The renewable energy source 30, the load 40, and the energy storage system 50 are connected to a utility battery 60 via a power line 101 through the smart power system operating mode switcher 10. The intelligent power system operation mode switcher 10 of the present invention comprises at least a mains sensing unit 11, a communication unit 12, a load detecting unit 13, an arithmetic unit 14, and a control mode switching unit 15.

The mains sensing unit 11 is connected to the mains 60 via a detection line 102 for detecting the power supply status of the mains 60.

The communication unit 12 is connected to the power generation device 20, the regenerative energy source 30, the load 40, and the energy storage system 50 via a communication line 103, and is configured to notify the power generation device 20 of the operation mode after the calculation and the determination. Renewable energy source 30, the load 40, and the energy storage system 50.

The load detecting unit 13 is connected to the load 40 through a load control line 104 for sensing the operating state of the load 40.

The computing unit 14 is connected to the mains sensing unit 11, the communication unit 12 and the load detecting unit 13 for processing signals transmitted by the utility sensing unit 11 and the load detecting unit 13 to determine the utility power 60. Whether an abnormality occurs and whether the load 40 can be temporarily powered off, and after all the data are integrated, the data data is authenticated and transmitted.

The control mode switching unit 15 is connected to the computing unit 14 to provide relevant control parameters and signals to the power generating device 20 and the energy storage system 50 via a control line 105 to switch the operating mode to the load according to the data. In either of the short-term power-off mode and the load-unstable power-off mode, the switching operation can be controlled to connect or disconnect the mains, to detect the mains failure, to control the parallel/independent operation mode of the generator, and to connect the regenerative energy in parallel. / Independent operation mode switching sequence control, and energy storage system parallel/independent operation mode switching sequence control and charge and discharge control.

The present invention can detect the utility power supply situation through the intelligent power system operation mode switcher 10, thereby determining the operation modes of the small power system 100, the power generation device 20, and the energy storage system 50, and can be based on the importance and characteristics of the load 40. The type of device that determines the energy supply.

When in operation, as shown in FIG. 2, in step 201, the state of the commercial power is detected by the power sensing unit of the smart power system operating mode switch; then, in step 202, it is determined whether an abnormality occurs, if In normal operation, the process returns to step 201 to connect the small power system with the mains, and the load is supplied by the mains. Otherwise, when the detection of the mains starts to occur, the process proceeds to step 203 to determine the switching of the operation mode. The sensing load is in a state in which the short-term power-off is acceptable without affecting the operation, and the process proceeds to step 204, where the intelligent power system operation mode switcher notifies the power generating device of the power system to supply energy through the communication line at the initial stage of the failure, and the setting is completed. Immediately after the operation mode, the connection with the commercial power is cut off; then, in steps 205 and 206, after the power generation device is controlled by the control line to establish the voltage required for the system operation, the load is started by the power generation device without affecting the load operation. The required energy, the power generation device will continue to supply power to the load in an independent operation mode, and the energy storage system cooperates with the power generation amount to change. The larger renewable energy system adjusts the output to maintain the stability of the power system.

On the other hand, if the above step 203 determines that the load is unacceptable for a brief power-off state via the load detecting unit, then proceeds to step 207, and the control mode switching unit of the intelligent power system operating mode switcher transmits through the initial stage of the fault. After the control line informs the energy storage system to establish the voltage required for the system operation, the utility power is disconnected in step 208, and in step 209, the energy storage system supplies power to the load in an independent operation mode, and the power generation device continues to operate in parallel mode. The system can adjust the output with the renewable energy system with large change in power generation at any time to maintain the stability of the power system; then, in step 210, determine whether the utility power is re-powered in unit time, and if it has been restored, return to step 209; After the utility system has not recovered after the energy storage system has been operated for a certain period of time, the process proceeds to steps 211 and 212, and the control mode switching unit of the intelligent power system operation mode switcher notifies the power generation device to switch to the independent operation mode through the control line, and establishes the system. After the required voltage is operated, the energy storage system switching mode is notified to the parallel mode, and the power generation device is changed. It is establishing the desired operation of the system voltage, the power generation energy storage system with a large amount of change of a renewable energy system to adjust the output power to maintain system stability.

Thereby, the smart power system operation mode switcher of the present invention is used to detect the mains supply situation, and the power dispatching can be performed to determine the parallel/independent operation mode of the power system, and the energy can be determined according to the importance and characteristics of the load. The type of device, in parallel or independent operation mode, can maintain the balance and stability of the power system, so that the power system can maintain stable operation. When the mains power system fails, the user can continue to carry out load operation and use.

In summary, the present invention is an intelligent power system operation mode switcher, which can effectively improve various shortcomings of the conventional use, and can detect a power supply situation through a smart power system operation mode switcher, thereby determining a small power system, The operation mode of the power generation device and the energy storage system, and depending on the importance and characteristics of the load, the type of the device that provides the energy is determined, so that the generation of the invention can be made more progressive, more practical, and more in line with the needs of the user. The requirements for the invention patent application, and the patent application is filed according to law.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

10. . . Smart Power System Operating Mode Switcher

11. . . Mains sensing unit

12. . . Communication unit

13. . . Load detection unit

14. . . Arithmetic unit

15. . . Control mode switching unit

20. . . Power generation unit

30. . . renewable energy

40. . . load

50. . . Energy storage system

60. . . Mains

100. . . Power Systems

101. . . power line

102. . . Detection line

103. . . Communication line

104. . . Load control line

105. . . Control line

201~212. . . step

Fig. 1 is a schematic diagram showing the architecture of a smart power system operation mode switch and a small power system according to the present invention.

Figure 2 is a schematic diagram of the operational flow of the present invention.

10. . . Smart Power System Operating Mode Switcher

11. . . Mains sensing unit

12. . . Communication unit

13. . . Load detection unit

14. . . Arithmetic unit

15. . . Control mode switching unit

20. . . Power generation unit

30. . . renewable energy

40. . . load

50. . . Energy storage system

60. . . Mains

100. . . Power Systems

101. . . power line

102. . . Detection line

103. . . Communication line

104. . . Load control line

105. . . Control line

Claims (6)

An intelligent power system operation mode switch is provided for a power generation device, a regenerative energy source, a load and an energy storage system to be connected to a mains, and includes: a mains sensing unit connected to the mains through a detection line. The communication unit is configured to detect the power supply state of the utility power; the communication unit is connected to the power generation device, the renewable energy source, the load, and the energy storage system through a communication line, and is configured to notify the operation mode after the calculation and the judgment. The power generating device, the regenerative energy, the load, and the energy storage system; a load detecting unit connected to the load through a load control line for sensing an operating state of the load; an arithmetic unit The utility model is connected to the power sensing unit, the communication unit and the load detecting unit, and is configured to process the signal transmitted through the utility sensing unit and the load detecting unit, determine whether the utility power is abnormal, and whether the load can be temporarily powered off. After all the data are integrated, the data data is authenticated and transmitted; and a control mode switching unit is connected to the computing unit. According to the data, the control parameters and signals are provided to the power generating device and the energy storage system through a control line to switch the operation mode to any one of a load short-time power-off mode and a load non-severe power-off mode. The switching operation can be controlled as the connection or disconnection of the mains, the mains failure detection, the parallel/independent operation mode switching sequence control of the power generation device, the regenerative energy parallel/independent operation mode switching sequence control, and the parallel/independent operation mode of the energy storage system. Switching sequence control and charge and discharge control. The intelligent power system operation mode switcher according to claim 1 is combined with the power generation device, the regenerative energy source, the load, and the energy storage system to form a power system. The smart power system operating mode switch according to claim 2, wherein the power system is connected to the mains by a power line through the smart power system operating mode switch. The smart power system operation mode switch according to claim 1, wherein the load short-time power-off mode senses the load through the load detection unit to be a short-term power failure without affecting operation. In the state, the mains power is disconnected at the initial stage of the fault, and after the power generating device is controlled to establish the voltage required for the system operation through the control line, the power generating device continues to supply power to the load in an independent operation mode, and the energy storage system cooperates with the power generation amount to change. Larger renewable energy adjusts output to maintain power system stability. The smart power system operation mode switch according to claim 1, wherein the load non-transient power-off mode is sensed by the load detection unit to be unacceptable for a short power-off state. The control mode switching unit notifies the energy storage system to establish a voltage required for system operation after the failure occurs, and then disconnects the commercial power, and the energy storage system supplies power to the load in an independent operation mode, and the power generation device adopts a parallel mode. Continuous operation, the energy storage system can adjust the output with the renewable energy with large change in power generation at any time to maintain the stability of the power system. The intelligent power system operation mode switch according to claim 5, wherein, after the energy storage system is operated for a certain time, if the utility power has not recovered, the control mode switching unit notifies the control line through the control line The power generation device is switched to the independent operation mode, and the energy storage system is notified to switch to the parallel mode after establishing the voltage required for the system operation. At this time, the power generation device is required to establish the voltage required for the system operation, and the energy storage system has a large change with the power generation amount. The renewable energy adjusts the output to maintain the stability of the power system.