TWI834994B - Power consumption detection and distribution device and power consumption detection and distribution method - Google Patents

Abstract

The power consumption detection and distribution device of the present invention includes a switch module, a current detection unit and a control module. The switch module is connected between a power supply device and an additional power load. The current detection unit detects The power supply device outputs the output current to the general electrical load and generates the output current value accordingly. The power detection and distribution method executed by the control module includes receiving the output current value and determining whether the output current value is less than a safe load upper limit value. If so, , then the switch module is controlled to switch to the conductive state, so that the power supply device supplies power to the additional electrical load through the switch module; in the present invention, when the output of the power supply device has not reached the safe load upper limit, the power supply device supplies power to the additional electrical load. , to achieve the purpose of simultaneously ensuring the power consumption of general electrical loads and powering additional electrical loads in a timely manner.

Description

Power consumption detection and distribution device and power consumption detection and distribution method

A power consumption detection and distribution device and method, particularly a power consumption detection and distribution device and method for supplying power to additional power loads.

Generally, household electricity is provided by electric power companies. The electric power company will set up an electric meter outside the home to record the household electricity consumption. The electric power company will also set a power consumption limit to ensure that the current flowing through the meter meets safety regulations. . There will be another distribution box installed in the home to distribute and control the electricity in the home. The distribution box is equipped with a main power switch and a plurality of circuit protection components, such as circuit breakers, etc., to control the power distribution to the building units. Total current and current of various electrical appliances or sockets. When the current through the main power switch or one of the circuit protection components is greater than its preset current limit value, the main current switch or circuit protection component will trip to form an open circuit state to avoid the danger of overcurrent. At this time, if the main power supply If the switch is tripped, all electrical appliances will trip. If one of the circuit protection components is tripped, only the electrical appliances corresponding to the circuit protection component will trip. Therefore, the upper limit of the total current passing through the main power switch of the distribution box must be less than or equal to the upper limit of the total current that can be used by ordinary households, such as the power consumption limit set by the power company. For example, the power consumption limit of ordinary homes is usually 30 amps (A).

In recent years, in addition to traditional household appliances that require electricity, electric vehicle charging devices have become an increasingly common additional electrical device in ordinary homes. The power consumption of electric vehicle charging devices when charging electric vehicles is greater than that of ordinary household small appliances, and these additional power demands make the total power consumption likely to exceed the originally set total current upper limit, resulting in Power outage, etc.

Therefore, in order to avoid possible power outages, a common approach is to replace the main power switch with a power switch with a larger current limit value and apply to Taipower to increase the power consumption limit of the home. For example, change the main power switch to a new main power switch with a current limit of 100A, and apply to Taipower to increase the power consumption limit of the home to 100A. However, applying to increase the electricity consumption limit will not only change the calculation method of the home's electricity bill, causing the electricity bill to increase for the same amount of electricity, but also the distribution box and wires must be adjusted or replaced, resulting in additional costs. However, for example, the power consumption of electric vehicle charging devices is usually only required during a specific period of time, and the chance of affecting daily power consumption is very low. It is not cost-effective for ordinary households to replace the main power switch with a new one and apply for an increase in the power consumption limit. .

To sum up, when additional electrical devices are installed in a home, how to effectively control the total power consumption and avoid overcurrent without changing the rated instantaneous power consumption limit is bound to be an urgent need for ordinary household electricity.

In view of the need to effectively control users' electricity consumption to achieve the most effective distribution of electricity consumption, the present invention provides a power consumption detection and distribution device that is electrically connected to a power supply device. The current detection unit detects the power output by the power supply device. An output current, based on which an output current value is generated; the power consumption detection and distribution device includes: A switch module has a power input port and a power output port, the power input port is electrically connected to a power supply device, and the power output port is electrically connected to an additional electrical load; a current detection unit that detects an output current output from the power supply device to a general electrical load and generates an output current value accordingly; A control module has a current detection input terminal and a control output terminal; the current detection input terminal is connected to the current detection unit to receive the output current value; the control output terminal is electrically connected to the switch module to control The switch module outputs a control signal; Wherein, the control module determines whether the output current value is less than a safe load upper limit value; if so, the control module controls the switch module to switch to a conductive state, so that the power supply device passes through the power input port and the power output port. , supplying power to the additional electrical load.

In addition, the present invention also provides a power consumption detection and distribution method, which is executed by the control module of the power consumption detection and distribution device, including the following steps: Receive an output current value; the output current value is obtained by detecting an output current output from a power supply device to a general electrical load; Determine whether the output current value is less than a safe load upper limit value; If so, a switch module is controlled to switch to a conductive state, so that a power supply device supplies power to an additional electrical load through the switch module.

The power supply device connected to the power input port of the power consumption detection and distribution device of the present invention is, for example, an electric meter device installed by an electric power company, and the power supply device is electrically connected to the general power load, such as electrical equipment in a general home. , such as an indoor power distribution board, which is used to supply power to general electrical loads in the home, such as lights, televisions, fans, refrigerators, air conditioners, etc., and the power output port is electrically connected to the additional electrical loads, such as It is an electric vehicle charging equipment.

The current detection unit is used to detect the output current output by the power supply device to the general electrical load, so that the control module can determine whether the output current of the power supply device is lower than the safe load upper limit. If so, then It means that the current of the general electrical load in the user is still far below the rated upper limit of the current, and there is excess current available for additional electrical loads. Therefore, the control module controls the switch module to switch to conduction. status, so that the power supply device can supply power to the additional electrical load through the power output port of the switch module.

For example, the power consumption detection and distribution system is installed between the electric meter device and the indoor power distribution board, and is connected to the electric meter device through the power input port to receive power supply from the power company, and is connected to an additional power circuit through the power output port. It is used to supply power to additional electrical loads when there is excess current in general electricity consumption.

The power consumption detection and distribution device of the present invention can proactively ensure that the user's electricity can be provided to general daily electricity, such as lighting, refrigerators, etc., and when there is excess current, it will be further provided to additional electricity loads. , such as electric vehicle charging devices, to avoid power outages caused by excessive instantaneous power supply current. In this way, the charging device can be operated only when the daily power consumption is low, such as at night when the user is going to bed, without changing the upper limit of the rated current of the user. Efficient distribution of electricity.

Referring to Figures 1 and 2, the power consumption detection and distribution device 10 of the present invention is connected to a power supply device 20 and an additional power load 40, and mainly includes a switch module 11, a current detection unit 12 and a control Mod 13. The switch module 11 has a power input port I/P and a power output port O/P. The power input port I/P is electrically connected to the power supply device 20 , and the power output port O/P is electrically connected to the additional electrical load. 40. When the switch module 11 is in the conducting state, the power input port I/P and the power output port O/P are connected, so that the power supply device 20 can supply power to the additional electrical load 40 through the switch module 11 ; When the switch module 11 is in a non-conducting state, the power input port I/P and the power output port O/P are connected, so that the power supply device 20 cannot use the switch module 11 for additional power. Load 40 is powered. The switch module 11 is controlled by the control module 13 to switch between a conductive state and a non-conductive state. The current detection unit 12 detects an output current output by the power supply device 20 to the general electrical load 30 to generate an output current value, and provides the output current value to the current detection input of the control module 13 end. The current detection unit 12 is, for example, a current comparator 21 connected to the output circuit of the power supply device 20 to the general electrical load 30 to detect the current output from the power supply device 20 to the general electrical load 30 . output current. For another example, the current detection unit 12 is an ammeter, connected in series from the power supply device 20 to the output circuit of the general electrical load 30, and the control module 13 receives the output current value (S101), and determines the output Whether the current value is less than a safe load upper limit value (S102), if so, control the switch module 11 to switch to the conductive state (S103), so that the power supply device 20 passes through the power input port I/P and the power output port O/ P supplies power to the additional electrical load 40; if not, the switch module 11 is controlled to maintain a non-conducting state (S104).

Preferably, the upper limit of the safe load is less than an upper limit of the rated current. For example, assuming that the user's rated current upper limit is 80A, the safe load upper limit can be set to 60A. The upper limit of the rated current is the upper limit of the instantaneous power consumption set by the user at the Taipower end, and is also the upper limit of the power supply current of the power supply device 20 . When the output current value is less than the safe load upper limit, it means that there is still a gap between the output current value and the rated current upper limit. The excess power consumption is 20A, which is indeed enough to provide the additional power load 40A, so the control mode The group 13 controls the switch module 11 to be turned on, so that the power supply device 20 can supply power to additional electrical loads.

Please refer to FIG. 3 . In one embodiment of the present invention, when the control module 13 controls the switch module 11 to switch to the conductive state, the control module 13 continuously monitors the output of the power supply device 20 to the general purpose. The output current value of the electrical load 30. When the output current value is greater than a critical load upper limit value, the control module 13 starts timing and determines whether the output current value continues to be greater than the critical load upper limit value for more than a delay time (S105), and when the The control module 13 determines that the time when the output current value continues to be greater than the critical load upper limit value exceeds the delay time, and the control module 13 controls the switch module 11 to switch to a non-conducting state (S104); if the delay time does not exceed , then the switch module 11 is maintained in the conductive state.

Preferably, the critical load upper limit is greater than the safe load upper limit and less than the rated current upper limit. For example, the rated current upper limit is 80A, the safe load upper limit can be set to 60A, and the critical load upper limit is 70A. When the switch module 11 is switched on and the power supply device 20 supplies power to the general electrical load 30 and the additional electrical load 40 at the same time, if the output current output by the power supply device 20 to the general electrical load 30 continues to be greater than the critical When the load upper limit value exceeds the delay time, it means that the output current output by the power supply device 20 to the general electrical load 30 is too close to the rated current upper limit value for a long time and exceeds the rated current upper limit value at any time. This may lead to a power trip, so the control module 13 controls the switch module 11 to switch to non-conduction to stop power supply to the additional electrical load 40 to ensure power supply to the general electrical load 30 . Preferably, the safe load upper limit, the critical load upper limit and the delay time can be input and set by the user.

Please refer to FIG. 4 and FIG. 5 together. FIG. 5 is a schematic diagram of the appearance of the power consumption detection and distribution device 10 of the present invention. The power consumption detection and distribution device 10 includes a casing 100. The control module 13 and the current detection unit 12 are disposed in the casing 100, for example, integrated on a circuit board. A terminal block 101 is provided on the housing to provide connection terminals such as the input terminal of the current detection unit 12 and the working power input terminal of the control module 13 . In addition, in an embodiment of the present invention, the power distribution device further includes an input unit 14 and a display unit 15, which are disposed on the housing 100 and electrically connected to the control module 13 respectively. The input unit 14 is for the user to operate, for example, it includes a plurality of setting buttons 141 for receiving a safe load upper limit setting value, a critical load upper limit setting value and a delay time setting value input by the user. The control module 13 receives The safe load upper limit setting value, the critical load upper limit setting value and the delay time setting value are used to set the safe load upper limit value, the critical load upper limit value and the delay time accordingly. The display unit 15 is used to display and set the safe load upper limit setting value, the critical load upper limit setting value and the delay time setting value.

Please continue to refer to FIG. 4 and FIG. 5 . In one embodiment of the present invention, the switch module 11 includes a switching mechanism 111 and a driving motor 112 . The driving motor 112 is disposed inside the housing 100, and the switching mechanism has the conductive state and the non-conductive state, and the drive motor is electrically connected to the control module 13 to receive a control signal from the control module 13, and passes A rotating shaft is connected to the switching mechanism 111 and drives the switching mechanism 111 to switch between a conductive state and a non-conductive state. Preferably, the switch module 11 further includes a manual switching lever 113, connected to the switching mechanism 111, and disposed in an opening of the housing 100 for the user to manually switch the switching mechanism 111. In addition, the switch module 11 may be a controllable switch used to control a high-power power supply, such as a contactor switch, which is not limited by the present invention.

The above is only an embodiment of the present invention and does not constitute any form of limitation on the present invention. Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

10: Power consumption detection and distribution device 101:Terminal block 11:Switch module 111:Switch mechanism 112: Drive motor 113 manual switching lever I/P: power input port O/P: power output port 12:Current detection unit 13:Control module 14:Input unit 15:Display unit 20:Power supply device 21:Flow comparator 30: General electrical load 40: Additional electrical load

Figure 1 is a block diagram of the power consumption detection and distribution device of the present invention. Figure 2 is a schematic flow chart of the power consumption detection and distribution device method of the present invention. Figure 3 is a schematic flowchart of an embodiment of the power consumption detection and distribution device method of the present invention. Figure 4 is a block diagram of another embodiment of the power consumption detection and distribution device of the present invention. Figure 5 is a schematic diagram of the appearance of the power consumption detection and distribution device of the present invention.

10: Power consumption detection and distribution device 11:Switch module I/P: power input port O/P: power output port 12:Current detection unit 13:Control module 20:Power supply device 21:Flow comparator 30: General electrical load 40: Additional electrical load

Claims (7)

A power consumption detection and distribution device includes: a switch module having a power input port and a power output port, the power input port is electrically connected to a power supply device, and the power output port is electrically connected to an additional power load; a current A detection unit detects an output current output from the power supply device to a general electrical load, and generates an output current value accordingly; a control module has a current detection input terminal and a control output terminal; the The current detection input terminal is connected to the current detection unit to receive the output current value; the control output terminal is electrically connected to the switch module to output a control signal to the switch module; wherein, the control module determines the output current Whether the value is less than a safe load upper limit value; if so, the control module controls the switch module to switch to a conductive state, so that the power supply device supplies power to the additional electrical load through the power input port and the power output port; when the After the control module controls the switch module to switch to the conductive state, the control module continuously monitors the output current value. When the output current value is greater than a critical load upper limit, the control module starts timing, and when the control module The module determines that the time when the output current value is greater than the critical load upper limit exceeds a delay time, and the control module controls the switch module to switch to a non-conducting state. The power consumption detection and distribution device as described in claim 1 further includes: an input unit electrically connected to the control module and receiving a safe load upper limit setting value, a critical load upper limit setting value and a delay time setting value, And the control module sets the safe load upper limit value, the critical load upper limit value and the delay time according to the safe load upper limit setting value, the critical load upper limit setting value and the delay time setting value. The power consumption detection and distribution device as described in claim 2 further includes: a display unit electrically connected to the control module for displaying the safe load upper limit setting value and the delay time setting value. The power consumption detection and distribution device of claim 1, wherein the switch module includes: a switching mechanism having the conductive state and the non-conductive state; a drive motor connected to the switching mechanism and electrically connected to the control The module receives a control signal from the control module and drives the switching mechanism to switch between the conductive state and the non-conductive state accordingly. The power consumption detection and distribution device as described in claim 4, wherein the switch module includes: a manual switching lever connected to the switching mechanism for manual switching of the switching mechanism. The power consumption detection and distribution device according to claim 1, wherein the switch module is a contactor switch. A power consumption detection and distribution method is executed by a control module of a power consumption detection and distribution device, and includes the following steps: receiving an output current value; the output current value is output from a power supply device to a general power load. Output current; determine whether the output current value is less than a safe load upper limit value; if so, control a switch module to switch to a conductive state, so that the power supply device supplies power to an additional electrical load through the switch module; when controlling the switch After the module is switched to the conductive state, the following steps are further performed: continuously monitor the output current value; when it is detected that the output current value is greater than a critical load upper limit value, it is determined that the output current value is greater than the critical load upper limit value. Whether the time exceeds a delay time; if so, control the switch module to switch to a non-conducting state.

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