TW201401717A - Power management method of a multi-power supply system - Google Patents

Abstract

A power management method of multi-power system is discoursed. The multi-power system is electrically coupled to a natural resource power generator, a grid power generator, an internet and a server, so as to provide electrical power to loads. The multi-power supply system includes a control module, a battery module and a user interface module. The power management method includes: receive an electricity price of the grid power; set a safe capacity of the battery module; and determine a power supply mode according to a power production of the natural resource power generator, the power supply, the price of the grid power, a present capacity of the battery module and the safe capacity of the battery module.

Description

Power management method for multiple power supply systems

The present invention relates to a power management method, and more particularly to a power management method for a multiple power supply system.

With the development and advancement of science and technology, people's demand for energy is increasing. At present, the sources of electric grid in various countries in the world include thermal power generation, hydropower generation, natural gas power generation and nuclear power generation. Among them, the efficiency of nuclear power generation is good, but nuclear power generation The operational safety is a matter of careful attention, and its subsequent waste disposal is also complicated, so countries are currently researching towards green energy technology. Green energy technology is a kind of sustainable energy that can be inexhaustible and does not cause environmental pollution. For example, solar power is a kind of green energy technology, which mainly uses the characteristics of optoelectronic semiconductor materials to make sunlight. Converted to electricity to provide the user's power needs. However, the current efficiency of solar power generation is still limited by materials and natural environmental parameters, and the photoelectric conversion efficiency is not good. In other words, solar power generation cannot be effectively utilized. Other natural energy sources such as wind energy, hydropower, and geothermal energy also suffer from the same problems.

The invention provides a power management method for a multi-power supply system, which can determine the power supply mode of the multi-power supply system according to the power generation amount of the self-generation power source, the power supply amount required by the load, the city electricity price information, the current battery power and the safety stock, In turn, the cost of electricity is reduced.

Therefore, the power management method of the multiple power supply system of the embodiment of the present invention, The multi-power supply system is coupled to the self-generating power source, the mains power source, the internet network and the server to provide the power required for the load, and the multi-power supply system includes the control module, the battery module and the user interface. The power management method of the module includes: receiving the city electricity price information; setting the safety stock of the battery module; and generating power according to the self-generation power source, the power supply required by the load, the city electricity price information, the current battery power and the safety stock, Determine the power mode.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to FIG. 1. FIG. 1 is a block diagram of a system according to an embodiment of the present invention. As shown in FIG. 1 , the multi-power supply system 10 of the embodiment of the present invention is coupled to a self-generating power source 50 , other self-generating power sources 60 , a mains power source 70 , an internet network 90 , and a server 100 . The multi-power supply system 10 is configured to provide the power required for the load 80. The multi-power supply system 10 includes a control module 20, a battery module 30 and a user interface module 40. The load 80 can be, for example, electricity for the people's livelihood, household electricity, and industrial power, etc., but not limited thereto.

The control module 20 is configured to execute a power management program, a power supply mode, and/or a protection mechanism. Furthermore, the control module 20 is based on the amount of power generated by the self-generating power source 50 and other self-generating power sources 60, the amount of power required by the load 80, the price information of the utility power source 70, the current battery module 30, and the safety stock. Determine the power mode. The control module 20 has functions such as timing, calculation, measurement, and/or signal conversion (for example, analog signal to digital signal, or digital signal to analog signal). In addition, the control module 20 also calculates the safety stock of the battery module 30, and the definition and calculation process of the safety stock will be described together with FIG. The control module 20 can use, for example, a special purpose integrated circuit. (Application-specific integrated circuit, ASIC), field programmable logic gate array (FPGA), microcontroller (MCU) and other integrated circuit or logic circuit implementation.

As shown in FIG. 1 , the battery module 30 is coupled to the control module 20 . The battery module 30 is composed of a secondary battery. The battery module 30 is used to store power from the self-generating power source 50, other spontaneous power sources 60, or the utility power source 70. The electric power may be an alternating current power source or a direct current power source, and the electric power is converted into a required power source type through an AC/DC conversion circuit to be output to the load 80. The battery module 30 can include, but is not limited to, a lead acid battery, a nickel cadmium battery, a nickel hydrogen battery, a lithium cobalt battery, a lithium manganese battery, and/or a lithium iron phosphate battery. In addition, when the temperature of the battery module 30 is too high, the multi-power supply system 10 stops charging or discharging the battery module 30 to protect the battery module 30.

The user interface module 40 is coupled to the control module 20 . The user interface module 40 is configured to provide a user with data input (for example, a value of a safety stock), data deletion, setting change (for example, switching a power supply mode), or data update, thereby allowing a user to apply a multi-power supply system. 10 for control. The user interface module 40 can include a data input interface (eg, a keyboard, a mouse), a data display interface (eg, a screen), and/or a data transfer interface (eg, USB port, network port, etc.). In the embodiment of the present invention, the user interface module 40 can be, for example, a touch screen, but is not limited thereto. In addition, when the user needs to carry the multi-power supply system 10 to go out, the user interface module 40 can be used to switch or set the power supply mode. At this time, the multi-power supply system 10 charges the battery module 30 to the full power storage. For use on the go. Similarly, when the multi-power supply system 10 receives the warning information of the early warning, the battery module 30 is also charged to the full power reserve before the utility power is cut off.

The self-generating power source 50 is coupled to the multi-power supply system 10. The self-generating power source 50 is used to convert energy into electricity. In the embodiment of the present invention, the self-generating power source 50 It can be provided, for example, by a solar power module. The other spontaneous power source 60 is coupled to the multi-power supply system 10. Other spontaneous power sources 60 are also used to convert energy into electricity. In the embodiment of the present invention, the other spontaneous power source 60 can be provided by, for example, wind power, hydraulic power, geothermal energy, and/or biomass power generation module, but not limited thereto. The mains power supply 70 is coupled to the multi-power supply system 10. The mains power supply 70 is used to provide AC power. The mains supply 70 can provide AC power of 110 volts, 220 volts or other voltage specifications.

As shown in FIG. 1, the Internet 90 is coupled to the multi-power supply system 10. The Internet 90 is used to provide the multi-power supply system 10 to transmit or receive information, data, and/or signals to the server 100. Internet 90 can be comprised, for example, of a wireless network and/or a wired network.

The server 100 is coupled to the Internet 90. The server 100 is configured to provide information and materials required by the control module 20 to perform power management procedures and protection mechanisms. In the implementation of the present invention, the server 100 can provide weather information (for example, sun illuminance value, a cloud amount value, a temperature value, a wind speed value, a wind direction value and a humidity value, etc.) and/or power supply information. (For example, the mains power outage information), or the server 100 can store the user's power usage record (for example, the user's usage history).

As described above, the multi-power supply system 10 in the embodiment of the present invention can utilize the weather information, the power usage information, and the power supply information, and establish a prediction model through a Machine Learning method. The prediction model can obtain the predicted power generation amount on the next day according to the daily weather forecast data and date information obtained every day, and then dynamically adjust the value of the safety stock, thereby improving the power consumption efficiency.

Next, please refer to FIG. 2. FIG. 2 is a schematic diagram showing the relationship between power consumption, power supply, and electricity cost according to an embodiment of the present invention. As shown in Figure 2, the horizontal axis represents time, the left vertical axis represents the power consumed by the load 80, and the right vertical axis table. Shown is the electricity bill for the mains power supply 70.

First, the curve 201 is a one-day electricity price curve, which belongs to the peak electricity price after the time is 7 o'clock and the time before the 23 o'clock, and the curve 201 belongs to the peak electric power price after the time is 23 o'clock and the time is 7 o'clock. . The curve 203 is the one-day power generation amount of the self-generation power source 50, and the curve 205 is the one-day power consumption of the load.

During the off-peak power price of the multi-power supply system 10 in the embodiment of the present invention, since the self-generation power source 50 (for example, solar power generation) fails to have a suitable natural environment parameter, the power generation amount is smaller than the load 80. The electrical demand, therefore, the utility power supply 70 provides power to the load 80 and maintains the battery module 30's charge at a safe inventory. Thereby, relatively inexpensive power is stored in the battery module 30.

Then, when the multi-power supply system 10 is during the peak power price, and the power generation amount of the self-generation power source 50 is less than the power demand of the load 80 (ie, the period when the curve 203 is lower than the curve 205), the battery module 30 supplies power to the load 80. . Thereby, the relatively inexpensive power stored in the battery module 30 is provided to the load 80 for use to reduce the cost of electricity. In addition, when the power in the battery module 30 is insufficient or cannot be supplied to the load 80, it is powered by the other spontaneous power source 60 or the commercial power source 70.

Next, when the multi-power supply system 10 is during the peak power price, and the power generation amount of the self-generation power source 50 is greater than the power demand of the load 80 (ie, the period during which the curve 203 is higher than the curve 205), the self-generation power source 50 supplies power to the load. 80 is used to reduce the cost of electricity and to charge the battery module 30.

Next, please refer to FIG. 1 and FIG. 3 together. FIG. 3 is a flow chart of steps of a power management method for a multi-power supply system according to an embodiment of the present invention. As shown in FIG. 3, first, in step S301, the multi-power supply system 10 can access the Internet. 90 or the user interface module 40 receives the utility price information. The city electricity price information includes the off-peak electricity price and the peak electricity price.

Then, in step S303, the user can input or change the safety stock of the battery module 30 through the user interface module 40, or the safety information information is automatically obtained by the multi-power supply system 10 via the Internet 90 to the server 100. The safety stock of the battery module 30 is set. The safety stock is a battery storage capacity lower than the full power inventory. For example, when the utility power supply 70 is not powered off by an early warning, the safe inventory of the battery module 30 needs to be able to be powered for use by the load 80 and maintain power for hours (eg, four hours). In addition, in another embodiment of the present invention, the order of step S301 and step S303 may also be exchanged.

As described above, in another embodiment of the present invention, the security stock may be determined based on calculations by the user's power usage data, and the user power usage data includes at least one cycle of single-day power usage data and a periodic average. Electricity data. In addition, the multi-power supply system 10 can filter the user's power usage data by setting filter conditions. Furthermore, at least one cycle of single-day electricity consumption data that meets the filtering condition is defined as abnormal data, and the user power consumption data is formed after the abnormal data is deleted. For example, the anomaly data can be filtered using a calculation formula of average and standard variation, for example, if the difference between one cycle of single-day electricity consumption data and periodic average power consumption data is more than two standard deviations, Filter the single-day electricity consumption data of the pen period to avoid the value of the safety stock being affected by the abnormal data.

As described above, in another embodiment of the present invention, the safety stock may be determined based on the user's power usage data and the self-generated power generation amount prediction information, and the user power usage data includes at least one prior day power usage data. The power usage data can also incorporate the concept of weight. For example, calculate the average power usage on the current day of the cycle as a reference for the next cycle, and The weight value of the near date is set to be higher. The self-generated power generation amount prediction information is determined according to weather data including a solar illuminance value, a light incident angle, a cloud amount value, a temperature value, a wind speed value, a wind direction value, and a humidity value. Similarly, at least one of the previous power consumption data that meets the filter condition is defined as abnormal data, and the user power consumption data is formed after the abnormal data is deleted.

Next, in step S305, the multi-power supply system 10 determines whether the amount of power generated by the self-generating power source 50 or other spontaneous power source 60 is greater than the amount of power required by the load 80. For example, the multi-power supply system 10 can determine the power wattage of the power generation amount and the power wattage of the power supply amount.

In step S317, when the power generation amount of the self-generation power source 50 or other spontaneous power source 60 is greater than the power supply amount required by the load 80, the power supply amount required for the load 80 is supplied from the self-generation power source 50 or other spontaneous power source 60, and the battery is charged. Module 30 is charged.

Next, in step S307, when the power generation amount of the self-generation power source 50 is smaller than the power supply amount required by the load 80, it is further determined that the current utility price is the off-peak price or the peak price. As shown in Figure 2, the peak electricity price is lower than the peak electricity price.

In step S315, when the current utility price is the peak electricity price, the battery module 30 is provided with the power supply amount required for the load 80, thereby reducing the power consumption cost. In step S309, when the current utility price is the off-peak price, it is further determined whether the current battery level of the battery module 30 is greater than the safety stock. Next, when the current battery power is greater than the safety stock, the process proceeds to step S315. In step S313, when the current battery power is less than the safety stock, the power supply required for the load 80 is supplied by the commercial power source 70, and the battery module 30 is charged to a safe inventory.

In summary, the power management method of the multi-power supply system of the present invention utilizes the battery module to maintain sufficient power during standby period. Fully stock state, and retain enough energy storage space to store the electricity generated by self-generation in the case of natural environmental parameters required by natural electricity. Next, during the peak commercial power supply with natural environmental parameters required for natural electricity, household electricity is supplied from the electric power generated by the self-generation, and the remaining self-generated electric power is used to charge the battery. Then, during the peak power-down period in which the natural environment parameters required for self-generation are not available, the battery module storing the self-generated power is used to provide household electricity, thereby minimizing the cost of electricity.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope is subject to the definition of the scope of the patent application attached.

10‧‧‧Multiple power supply system

20‧‧‧Control Module

30‧‧‧ battery module

40‧‧‧User Interface Module

50‧‧‧Self-powered power supply

60‧‧‧Other spontaneous power supplies

70‧‧‧mains power supply

80‧‧‧load

90‧‧‧Internet

100‧‧‧Server

201~205‧‧‧ Curve

S301~S317‧‧‧Method Step Description

FIG. 1 is a block diagram of a system according to an embodiment of the present invention.

2 is a schematic diagram showing the relationship between power consumption, power supply, and electricity cost according to an embodiment of the present invention.

3 is a flow chart showing the steps of a power management method for a multi-power supply system according to an embodiment of the present invention.

S301~S317‧‧‧Steps

Claims (11)

A power management method for a multi-power supply system, wherein the multi-power supply system is coupled to at least one self-generation power source, a utility power source, an internet network, and a server to provide a power supply required for a load, which is more The power supply system includes a control module, a battery module and a user interface module. The power management method includes: receiving a utility price information; setting a safety stock of the battery module; and A power supply mode is determined by at least two of the amount of power generated, the amount of power required for the load, the city electricity price information, the current battery level of one of the battery modules, and the safety inventory. The power management method of the multiple power supply system of claim 1, wherein the step of determining the power supply mode comprises: providing the load by the self-generated power source when the power generation amount of the self-generated power source is greater than the power supply amount The required power supply and charging of the battery module. The power management method of the multiple power supply system according to claim 1, wherein the step of determining the power supply mode includes: when the power generation amount of the self-generated power source is less than the power supply amount, according to the utility price information and the safety stock The relationship determines the power mode. The power management method of the multi-power supply system according to claim 3, wherein the power supply mode includes the power supply required by the battery module to provide the load when the utility price information is a peak electricity price. The power management method for a multi-power supply system according to claim 3, wherein the power supply mode includes when the utility price information is an off-peak price, and the current battery power is greater than the safety stock, The group provides the amount of power required for this load. The power management method of the multiple power supply system as described in claim 3, wherein the power supply mode includes: when the utility price information is a peak power price, and the current battery power is less than the safety stock, the utility power source The power supply required for the load is provided, and the battery module is charged to the safety stock. For example, the power management method of the multi-power supply system described in claim 1 further includes obtaining a power-off information for charging the battery module to a full-power inventory before the utility power is cut off to provide The amount of power required for this load. The power management method of the multi-power supply system according to claim 1, wherein the safety stock is determined according to a user input through the user interface module, and the safety stock is not greater than a full charge. The power management method for a multi-power supply system according to claim 1, wherein the safety stock is determined according to a user power consumption data, wherein the user power data includes at least one cycle of single-day electricity data and One cycle average electricity consumption data. The power management method of the multiple power supply system according to claim 1, wherein the safety stock is determined according to a self-generated power generation quantity prediction information, wherein the self-generated power generation quantity prediction information is provided according to the Internet The climate parameters are determined. The power management method for a multi-power supply system according to claim 10, wherein the climatic parameters include an illuminance value, a light incident angle, a cloud amount value, a temperature value, a wind speed value, and a wind direction value. With a humidity value.