TWI521335B - Intelligent power saving system and its method - Google Patents

Description

Intelligent power saving system and method thereof

The invention relates to an intelligent power saving system and a method thereof, in particular to an intelligent power saving system and a method thereof obtained by using an energy storage device under a parallel structure.

At present, the power supply system of all countries in the world, the most troublesome thing for power companies is that there is too much electricity during peak hours, which leads to the need for power companies to add more power plants and transmission and distribution facilities. However, when the peak period is too low, the power consumption will cause No waste of electricity.

Furthermore, according to the current power technology rules of Taiwan Power Company, when the user's electricity consumption exceeds the contract capacity by 10%, the electricity fee is calculated twice, and when the contract capacity exceeds 10%, the electricity fee is calculated at three times. In view of this, how to effectively control the power consumption of the pipe is maintained within the contract capacity, which becomes an important issue for cost saving.

On the other hand, under the premise that carbon rights trading is about to become a trend in the future, the carbon footprint of each factory is currently inspected. Electricity accounts for 60% to 80% of the carbon footprint of a company. If the power company can accurately grasp the user's electricity consumption, It will greatly improve efficiency and reduce the proportion of power carbon footprint, and enhance the competitiveness of enterprises in the international arena.

In view of the above, the present invention proposes an intelligent power saving system and method thereof to effectively overcome the above problems in view of the above-mentioned shortcomings of the prior art.

The main object of the present invention is to provide an intelligent power saving system and method thereof, which can effectively prevent power users from exceeding the contract to save electricity costs.

Another object of the present invention is to provide an intelligent power saving system and method thereof, in which a power user can review the most appropriate contract capacity after installing an energy storage device, and apply to the power company to reduce the contract capacity to save electricity costs and reduce the carbon footprint ratio. .

Still another object of the present invention is to provide an intelligent power saving system and method thereof that enable a power company to eliminate the need for additional power plants or even load down operations.

To achieve the above objective, the present invention provides an intelligent power saving system, which is disposed between a mains power supply end and at least one load end. The intelligent power saving system includes at least one energy storage device; at least one is connected to the mains power supply end. a power supply circuit of the load end; at least one parallel circuit of the energy storage device electrically connecting the energy storage device to the power supply circuit; and a power monitor electrically connected to the commercial power supply end, the energy storage device and the parallel circuit of the energy storage device, It selects whether the energy storage device is powered to the load terminal through the parallel circuit of the energy storage device.

The invention further provides a smart power saving method, which is disposed between a mains power supply end and at least one load end. The intelligent power saving method comprises the following steps: first, setting a power monitoring between the mains power supply end and the load end And at least one energy storage device, the power monitor is connected to the mains power supply end and the energy storage device. Then, the power monitor selects whether the energy storage device supplies power to the load terminal according to the power consumption.

The purpose, technical content, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

Please refer to FIG. 1 , which is a block diagram of the intelligent power saving system of the present invention. As shown in the figure, the intelligent power saving system of the present invention is disposed between a mains power supply terminal 10 and at least one load terminal 12. The intelligent power saving system includes at least one energy storage device 14; at least one power supply circuit 20 connecting the mains power terminal 10 and the load terminal 12; at least one energy storage device parallel circuit 18 electrically connecting the energy storage device 14 to the power supply circuit 20; and a power monitor 16 electrically connected to the mains power terminal 10, the energy storage device 14 and the power supply circuit 20, wherein the energy storage device 14 is selected to pass through the energy storage device parallel circuit 18, and is supplied to the load terminal 12 to adjust Mains power supply ratio.

When the power supervisor controller 16 detects that the power output from the utility power terminal 10 to the power supply circuit 20 is close to a certain preset value, such as a contracted capacity signed with the power company, the power monitor 16 will adjust the voltage of the energy storage device 14. The intensity is greater than the voltage of the power supply circuit 20, so that the power of the energy storage device 14 is put into the power supply circuit 20 through the parallel circuit 18 of the energy storage device, and is supplied to the load terminal 12 to adjust the power supply ratio. For example, the agreed power consumption signed with the power company is 300 kWh, and the power monitor 16 monitors that the total power output from the commercial power supply terminal 10 to the load terminal is equal to 300 kWh, and the power monitor 16 will store the energy storage device 14. The power is put into the power supply circuit 20, which will prevent the cost of the power from exceeding the contract.

The energy storage device 14 described above is a lithium iron phosphorus battery, and the power monitor 16 simultaneously monitors whether the energy storage device 14 is operating normally. Furthermore, the peak period of the mains power supply terminal 10 can be utilized, that is, when the electricity cost is the cheapest, the energy storage device 14 is charged to be used for peak removal during the peak period, thereby effectively achieving the purpose of not exceeding the control.

Furthermore, please refer to FIG. 2, which is a block diagram of another embodiment of the intelligent power saving system of the present invention. The difference between FIG. 2 and FIG. 1 is that the embodiment in FIG. 2 has a plurality of load terminals 12, and at this time, the number of power supply circuits 20 provided by the commercial power supply terminal to the load terminal 12 is in accordance with the load terminal 12. The number of the energy storage device 14 and the energy storage device parallel circuit 18 also varies with the number of load terminals 12 such that each load terminal 12 has an energy storage device 14 in parallel. However, as shown in the figure, the energy storage device parallel circuit 18 is fully coupled to the power supervisor controller 16 described above for overall control.

Please refer to FIG. 1 and FIG. 3 together. FIG. 3 is a flow chart of the intelligent power saving method of the present invention. As shown in the figure, first, as described in step S1, a power monitor 16 and at least one energy storage device 14 are disposed between the commercial power supply terminal 10 and the load terminal 12, and the power monitor 16 and the commercial power supply terminal 10 and the energy storage device are provided. 14 electrical connection. Then, as described in step S2, the power monitor 16 determines the power consumption. If the power consumption is equal to a specific preset value, the energy storage device 14 is combined with the commercial power supply terminal 10 to supply the load terminal 12 as described in step S3. If the power consumption is less than a certain preset value, power is supplied from the commercial power supply terminal 10 to the load terminal 12 as described in step S4. When the energy storage device 14 is combined with the commercial power supply terminal 10 to supply the load terminal 12 as described in step S3, in step S5, the power monitor 16 will determine whether the energy storage device 14 is abnormally operating, such as in an uncharged state. Or in a fault state, if it is abnormal operation, then return to step S4, if not, then, as described in step S6, when the energy storage device 14 participates in power supply to the load terminal 12, the power monitor 16 simultaneously determines the power consumption, If the power usage is equal to a specific preset value, return to the power storage device 14 to continue to supply power to the load terminal 12 as described in step S3. If the power consumption is less than a specific preset value, as described in step S4, The mains power supply terminal 10 is supplied with power to the load terminal 12.

The power monitor 16 described above controls whether the energy storage device 14 participates in power supply to the load terminal, that is, the power source is configured to be stored by the energy storage device 14 as previously described.

Furthermore, please refer to FIG. 4 again, which is a flow chart of charging the energy storage device 14 when the above-mentioned step S5 detects that the energy storage device 14 is in an unsaturated state. As described in step S11, when the power monitor 16 detects an unsaturation state at the energy storage device 14, the power monitor 16 will set a charging period of the energy storage device 14, such as a peak period. Subsequently, as described in step S12, the power monitor 16 will detect if the energy storage device 14 is faulty. If not, the mains power supply terminal 10 charges the energy storage device 14 through the power supply circuit 20 and the energy storage device parallel circuit 18 as described in step S13 until the battery is fully charged. If the energy storage device 14 is faulty, the mains power terminal 10 will no longer charge the energy storage device 14 as described in step S14.

In summary, the present invention provides an intelligent power saving system and method thereof, which utilizes the uniqueness of an energy storage device, such as a lithium iron phosphorus battery uninterruptible power system, to effectively prevent power users from exceeding the contract. Furthermore, the power user can review the most appropriate agreed power consumption after reviewing the device energy storage device from the power consumption curve, and apply to the power company to reduce the agreed power consumption to save electricity costs, reduce the carbon footprint ratio, and enhance the company's international competitiveness. . In addition, the power company can also no longer add power plants from the user's stable power control, and even reduce the load.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

10. . . Mains power supply

12. . . Load side

14. . . Energy storage device

16. . . Power monitor

18. . . Energy storage device parallel circuit

20. . . Power supply loop

Figure 1 is a block diagram of the intelligent power saving system of the present invention.

Figure 2 is a block diagram showing another embodiment of the intelligent power saving system of the present invention.

Figure 3 is a flow chart of the intelligent power saving method of the present invention.

Figure 4 is a flow chart of the present invention for charging an energy storage device when it detects that the energy storage device is in an unsaturated state.

10. . . Mains power supply

12. . . Load side

14. . . Energy storage device

16. . . Power monitor

18. . . Energy storage device parallel circuit

20. . . Power supply loop

Claims (9)

An intelligent power-saving system is disposed between a mains power supply end and at least one load end, the intelligent power-saving system includes: at least one energy storage device; at least one power supply circuit connecting the mains power end and the load end; At least one energy storage device parallel circuit electrically connecting the energy storage device to the power supply circuit; and a power monitor electrically connected to the mains power supply end, the energy storage device and the energy storage device parallel circuit When the mains power supply end is off the peak period, the energy storage device end is charged, and if the power monitoring controller detects that the output power of the mains power supply end is equal to a certain preset value, the power monitor adjusts The voltage intensity of the energy storage device is selected to supply power to the load terminal through the parallel circuit of the energy storage device to adjust the power supply ratio to avoid overloading, wherein the specific preset value is a contract capacity signed with the power company. And the power monitor monitors whether the energy storage device is operating normally. The intelligent power saving system of claim 1, wherein the energy storage device is a lithium iron phosphorus battery. The intelligent power saving system of claim 3, wherein the mains power supply end charges the energy storage device end through the power supply circuit and the energy storage device parallel circuit. The intelligent power saving system of claim 1, wherein when the load end is plural, the number of parallel circuits of the energy storage device and the energy storage device varies according to the number of the load ends, so that each The load side is connected in parallel with the energy storage device. An intelligent power saving method is disposed between a mains power supply end and at least one load end, the smart The power saving method includes the following steps: a power monitor and at least one energy storage device are disposed between the mains power terminal and the load end, the power monitor is connected to the mains power terminal and the energy storage device; and when When the mains power supply end is off the peak period, the mains power supply end charges the energy storage device end through the power supply circuit and the energy storage device parallel circuit, and the power monitor controls the energy storage device according to a power consumption. When the power consumption is equal to a certain preset value, the power supervisor controller controls the power supply of the storage device to the load end to reduce the power demand of the utility power source, wherein the specific preset value is a contract signed with the power company. Capacity and cause the power monitor to monitor whether the energy storage device is functioning properly. The intelligent power saving method as described in claim 7 further includes: setting a power supply loop connecting the mains power supply end and the load end, and setting at least one energy storage device parallel circuit, the electrical property thereof Connected to the power monitor and electrically connected to the power supply circuit, the power monitor controls whether the energy storage device supplies power to the load terminal through the energy storage device parallel circuit. The intelligent power saving method of claim 7, wherein the energy storage device is a lithium iron phosphorus battery. The intelligent power saving method of claim 10, wherein the power monitor determines whether the energy storage device is faulty before charging the energy storage device end, and if the fault occurs, the power storage device does not perform Charging, if not faulty, the energy storage device is charged by the utility power terminal. The intelligent power saving method of claim 7, wherein when the energy storage device is plural, each of the energy storage devices is connected to the load terminal.