Power monitoring device
By using a controller in the power monitoring device to automatically adjust the direction of current and voltage, the problem of monitoring when the current converter is connected incorrectly is solved, and accurate power monitoring is achieved without manual maintenance, saving manpower and time costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELTA ELECTRONICS INC(CN)
- Filing Date
- 2025-06-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing power monitoring devices require manual inspection of each current comparator when it is connected incorrectly or in reverse, which is time-consuming and difficult to perform, and cannot accurately monitor the power of each phase line in the power system.
The power monitoring device includes electronic components, AC power supply, current comparator, relay, and metering chip. The controller automatically adjusts the current and voltage direction to ensure that the metering chip can still accurately monitor the power even when the current comparator is connected incorrectly.
It enables accurate power monitoring even when the current converter is connected incorrectly, avoiding manual maintenance and saving manpower and time costs.
Smart Images
Figure CN224518855U_ABST
Abstract
Description
Technical Field
[0001] This case relates to a power monitoring device, and more particularly to a power monitoring device that can still perform power monitoring when the current converter is connected incorrectly. Background Technology
[0002] During electricity consumption, in order to monitor the electrical energy consumed at various points in the power system, electricity meters are often added to the power system to monitor electrical energy, thereby achieving the purpose of controlling and statistically analyzing energy consumption. In some multi-phase applications, in order to detect the electrical energy of each phase, multiple current transformers (CTs) and detection circuits are installed, matching the number of phases, to detect the electrical energy of each phase.
[0003] However, during actual installation, problems such as incorrect or reversed connection of the current comparator often occur, making it impossible to accurately monitor the electrical energy of each phase in the power system. When such issues arise, the current practice is to manually inspect each current comparator one by one to identify the incorrectly connected or reversed one. However, this method is extremely time-consuming, and manual inspection is often hampered by the complexity of power system circuits, their large size, and the difficulty of disassembly and assembly.
[0004] Therefore, developing a power monitoring device that can improve upon the shortcomings of the existing technology is an urgent need at present. Utility Model Content
[0005] The purpose of this invention is to provide a power monitoring device that allows the voltage and current received by the metering chip to correspond to the voltage and current on the same line, so that power monitoring can still be performed even when the current comparator is connected incorrectly. Therefore, it is not necessary to manually inspect all current comparators, thus saving manpower and time costs.
[0006] According to one aspect of the concept, this invention provides a power monitoring device, comprising an electronic device, an AC power supply, a first current transformer and a second current transformer, a first relay and a second relay, a metering chip, and a controller. The AC power supply is electrically connected to the electronic device and supplies power to the electronic device via a first wire and a second wire. The first current transformer and the second current transformer are used to monitor the power of the first wire and the second wire. The first relay and the second relay are respectively electrically connected to the first wire and the second wire. The metering chip includes a first receiving end and a second receiving end, wherein the first relay is configured to switch the first wire between being electrically connected to the first receiving end and being electrically connected to the second receiving end, and the second relay is configured to switch the second wire between being electrically connected to the first receiving end and the second receiving end. The first receiving end is electrically connected to the first current transformer to receive a first current, and the second receiving end is electrically connected to the second current transformer to receive a second current. The first receiving end receives a first voltage via the connected first relay or second relay, and the second receiving end receives a second voltage via the connected first relay or second relay. The metering chip generates a first monitored power based on the first voltage and the first current, and generates a second monitored power based on the second voltage and the second current. The controller is electrically connected to the metering chip, the first relay, and the second relay, and is integrated into the control of the metering chip, the first relay, and the second relay. When the first current comparator is reverse-connected, the controller controls the metering chip to reverse the first current at the first receiving end. When the second current comparator is reverse-connected, the controller controls the metering chip to reverse the second current at the second receiving end. When the first current comparator is located on the second line and the second current comparator is located on the first line, the controller controls the first relay to electrically connect the first line to the second receiving end, and controls the second relay to electrically connect the second line to the first receiving end.
[0007] In some embodiments, when the first current converter is reverse-connected, the controller controls the metering chip to reverse-adjust the first current received by the metering chip, and generates the first monitoring power according to the first voltage and the reverse-adjusted first current.
[0008] In some embodiments, when the second current converter is reverse-connected, the controller controls the metering chip to reverse-adjust the second current received by the metering chip, and generates the second monitoring power according to the second voltage and the reverse-adjusted second current.
[0009] In some embodiments, the first relay includes a first normally open interface, a first normally closed interface, and a first common interface. The first common interface is electrically connected to a first line, and the controller controls the first common interface of the first relay to be electrically connected to the first normally closed interface or the first normally open interface, so that the first line switches between being electrically connected to the first receiving end and being electrically connected to the second receiving end. The second relay includes a second normally open interface, a second normally closed interface, and a second common interface. The second common interface is electrically connected to a second line, and the controller controls the second common interface of the second relay to be electrically connected to the second normally open interface or the second normally closed interface, so that the second line switches between being electrically connected to the first receiving end and being electrically connected to the second receiving end.
[0010] In some embodiments, the first receiving end includes a first voltage interface and a first current interface, the first current interface being electrically connected to a first current comparator, and the first voltage interface being electrically connected to a first normally closed interface and a second normally open interface. The second receiving end includes a second voltage interface and a second current interface, the second current interface being electrically connected to a second current comparator, and the second voltage interface being electrically connected to a first normally open interface and a second normally closed interface.
[0011] In some embodiments, when the first current transformer is disposed on the first line and the second current transformer is disposed on the second line, the controller controls the first common interface of the first relay to be electrically connected to the first normally closed interface, so that the first line is electrically connected to the first voltage interface of the first receiving end, and the controller controls the second common interface of the second relay to be electrically connected to the second normally closed interface, so that the second line is electrically connected to the second voltage interface of the second receiving end.
[0012] In some embodiments, when the first current transformer is disposed on the second line and the second current transformer is disposed on the first line, the controller controls the first common interface of the first relay to be electrically connected to the first normally open interface, so that the first line is electrically connected to the second voltage interface of the first receiving end, and the controller controls the second common interface of the second relay to be electrically connected to the second normally open interface, so that the second line is electrically connected to the first voltage interface of the second receiving end.
[0013] In some embodiments, the metering chip communicates with the controller via a serial peripheral interface (interface) or a general asynchronous transceiver.
[0014] In some embodiments, the controller uses general-purpose input / output to control the first common interface of the first relay to be electrically connected to the first normally closed interface or the first normally open interface, and controls the second common interface of the second relay to be electrically connected to the second normally open interface or the second normally closed interface.
[0015] In some embodiments, the controller is also electrically connected to the electronic device, and the controller communicates with the electronic device via an RS485 interface or a controller area network. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the circuit structure of the power monitoring device according to a preferred embodiment of this invention.
[0017] Figure 2 When the first and second flow ratio devices in this case are positively connected, Figure 1 A schematic diagram of the circuit structure of a power monitoring device.
[0018] Figure 3 When the first and second current transformers in this case are misconnected, Figure 1 A schematic diagram of the circuit structure of a power monitoring device.
[0019] The reference numerals in the attached figures are explained as follows:
[0020] 1: Power monitoring device
[0021] 2: Electronic devices
[0022] 20: AC power supply
[0023] 3: First Flow Regulator
[0024] 4: Second Flow Regulator
[0025] 5: First relay
[0026] 50: First normally closed interface
[0027] 51: First normally open interface
[0028] 52: First Public Interface
[0029] 6: Second relay
[0030] 60: Second normally open interface
[0031] 61: Second normally closed interface
[0032] 62: Second Public Interface
[0033] 7: Metering chip
[0034] 70: First receiving end
[0035] 71: Second receiver
[0036] 8: Controller
[0037] C1: First current interface
[0038] C2: Second current interface
[0039] V1: First voltage interface
[0040] V2: Second voltage interface
[0041] L1: First Line
[0042] L2: Second Line Detailed Implementation
[0043] Some typical embodiments that embody the features and advantages of this invention will be described in detail in the following description. It should be understood that this invention can have various variations in different implementations, all of which do not depart from the scope of this invention, and the descriptions and illustrations therein are for illustrative purposes only and are not intended to limit this invention.
[0044] Figure 1 This is a schematic diagram of the system architecture of the power monitoring device 1 according to a preferred embodiment of this invention. Figure 1 As shown, the power monitoring device 1 of this case includes an electronic device 2, an AC power supply 20, a first current comparator 3, a second current comparator 4, a first relay 5, a second relay 6, a metering chip 7, and a controller 8. The AC power supply 20 is electrically connected to the electronic device 2 and supplies power to the electronic device 2 through the first line L1 and the second line L2. The first current comparator 3 and the second current comparator 4 are used to monitor the power of the first line L1 and the second line L2. The first relay 5 and the second relay 6 are electrically connected to the first line L1 and the second line L2, respectively.
[0045] The metering chip 7 includes a first receiving terminal 70 and a second receiving terminal 71. A first relay 5 is configured to switch a first line L1 electrically connected to the first receiving terminal 70 and electrically connected to the second receiving terminal 71, and a second relay 6 is configured to switch a second line L2 electrically connected to the first receiving terminal 70 and the second receiving terminal 71. The first receiving terminal 70 is electrically connected to a first current comparator 3 to receive a first current monitored by the first current comparator 3, and the second receiving terminal 71 is electrically connected to a second current comparator 4 to receive a second current monitored by the second current comparator 4. Furthermore, the first receiving terminal 70 receives a first voltage via the connected first relay 5 or second relay 6, and the second receiving terminal 71 receives a second voltage via the connected second relay 6 or first relay 5. The metering chip 7 generates a first monitoring power based on the first voltage and the first current, and generates a second monitoring power based on the second voltage and the second current.
[0046] The controller 8 is electrically connected to the metering chip 7, the first relay 5 and the second relay 6, and is configured to control the metering chip 7, the first relay 5 and the second relay 6, so as to control the electrical connection between the first receiving end 70 and the second receiving end 71 of the metering chip 7 and the first relay 5 and the second relay 6.
[0047] In some embodiments, when the positive and negative terminals of a current comparator are reversed, the current comparator is defined as reversed. The following uses the first line L1 and the corresponding first current comparator 3 as an example to illustrate the actual situation of the current comparator being correctly connected and reversed. The first line L1 has a first positive interface and a first negative interface corresponding to the positive and negative terminals of the first current comparator 3, respectively. When the positive and negative terminals of the first current comparator 3 are electrically connected to the first positive interface and the first negative interface of the first line L1, it means that the first current comparator 3 is correctly connected. Conversely, when the positive and negative terminals of the first current comparator 3 are electrically connected to the first negative interface and the first positive interface of the first line L1, it means that the first current comparator 3 is reversed. The reversed polarity of the second current comparator 4 is similar to that of the first current comparator 3, and therefore will not be described again. When the first current comparator 3 is reverse-connected, the controller 2 controls the metering chip 7 to reverse the first current received by the first receiving end 70 to generate a first monitoring power, which reflects the power of the first line L1. When the second current comparator 4 is reverse-connected, the controller 2 controls the metering chip 7 to reverse the second current received by the second receiving end 71 to generate a second monitoring power, which reflects the power of the second line L2.
[0048] Specifically, when the first current comparator 3 is reverse-connected, the controller 8 controls the metering chip 7 to reverse-adjust the first current received by the metering chip 7, and generates a first monitoring power based on the first voltage and the reverse-adjusted first current. Therefore, even if the first current comparator 3 is reverse-connected, the correct current on the first line L1 can still be obtained through the reverse-adjusted first current. Furthermore, since the reverse-adjusted first current corresponds to the correct current on the first line L1, the first monitoring power calculated by the metering chip 7 can still accurately reflect the power on the first line L1. When the second current comparator 4 is reverse-connected, the controller 8 controls the metering chip 7 to reverse-adjust the second current received by the metering chip 7, and generates a second monitoring power based on the second voltage and the reverse-adjusted second current. Therefore, even if the second current comparator 4 is reverse-connected, the correct current on the second line L2 can still be obtained through the reverse-adjusted second current. Furthermore, since the reverse-adjusted second current corresponds to the correct current on the second line L2, the second monitoring power calculated by the metering chip 7 can still accurately reflect the power on the second line L2.
[0049] In some embodiments, when the first current transformer 3 is disposed on the first line L1 and the second current transformer 4 is disposed on the second line L2, the first current transformer 3 and the second current transformer 4 are defined as positively connected. The case where the first current transformer 3 and the second current transformer 4 are positively connected is... Figure 2 Let's take an example. For instance... Figure 2As shown, the controller 8 controls the first relay 5 to electrically connect the first line L1 to the first receiving terminal 70, and controls the second relay 6 to electrically connect the second line L2 to the second receiving terminal 71. At this time, the first voltage and the first current received by the first receiving terminal 70 are actually the voltage and current on the first line L1. Therefore, the first monitoring power generated by the metering chip 7 reflects the power of the first line L1, and the second monitoring power reflects the power of the second line L2.
[0050] Conversely, when the first current transformer 3 is located on the second line L2 and the second current transformer 4 is located on the first line L1, the first current transformer 3 and the second current transformer 4 are defined as misconnected. The misconnection of the first current transformer 3 and the second current transformer 4 is defined as follows: Figure 3 Let's take an example. For instance... Figure 3 As shown, controller 8 controls first relay 5 to electrically connect first line L1 to second receiving terminal 71, and controls second relay 6 to electrically connect second line L2 to first receiving terminal 70. At this time, the second voltage and second current received by second receiving terminal 71 are actually the voltage and current on second line L2. Therefore, the second monitoring power generated by metering chip 7 reflects the power of second line L2. Thus, even if first current comparator 3 and second current comparator 4 are incorrectly connected, the voltage and current received by metering chip can still be made to correspond to the same phase through relay control, thereby obtaining the correct power for first line L1 and second line L2.
[0051] In some embodiments, the controller 2 receives an instruction and controls the first relay 5, the second relay 6, and the metering chip 7 according to the instruction. The instruction includes information about whether the current comparator is reverse-connected, correctly connected, or incorrectly connected. When the current comparator is reverse-connected, correctly connected, or incorrectly connected, the controller 2 controls the first relay 5, the second relay 6, and the metering chip 7 as described above, and will not be repeated here.
[0052] Therefore, the power monitoring device 1 of this case can make the voltage and current received by the metering chip correspond to the voltage and current on the same line, so that power monitoring can still be performed when the current comparator is connected incorrectly. Therefore, it is not necessary to manually repair all current comparators, thus saving manpower and time costs.
[0053] The electrical connection relationships of the first relay 5, the second relay 6, the first receiver 70, and the second receiver 71 are illustrated below to illustrate the electrical connection relationships of the first relay 5, the second relay 6, and the metering chip 7 under different conditions.
[0054] Please refer to the following: Figure 1The first relay 5 includes a first normally open interface 51, a first normally closed interface 50, and a first common interface 52. The first common interface 52 is electrically connected to the first line L1, and the controller 8 controls the first common interface 52 of the first relay 5 to be electrically connected to either the first normally closed interface 50 or the first normally open interface 51, so that the first line L1 is switched between being electrically connected to the first receiving end 70 and being electrically connected to the second receiving end 71. The second relay 6 includes a second normally open interface 60, a second normally closed interface 61, and a second common interface 62. The second common interface 62 is electrically connected to the second line L2, and the controller 8 controls the second common interface 62 of the second relay 6 to be electrically connected to either the second normally open interface 60 or the second normally closed interface 61, so that the second line L2 is switched between being electrically connected to the first receiving end 71 and being electrically connected to the second receiving end 72.
[0055] The first receiving end 70 includes a first voltage interface V1 and a first current interface C1. The first current interface C1 is electrically connected to the first current comparator 3, and the first voltage interface V1 is electrically connected to the first normally closed interface 50 and the second normally open interface 60. The second receiving end 71 includes a second voltage interface V2 and a second current interface C2. The second current interface C2 is electrically connected to the second current comparator 4, and the second voltage interface V2 is electrically connected to the first normally open interface 51 and the second normally closed interface 61.
[0056] Please refer to the following: Figure 2 When the first current comparator 3 is set on the first line L1 and the second current comparator 4 is set on the second line L2 (i.e., the first current comparator 3 and the second current comparator 4 are positively connected), the controller 8 controls the first common interface 52 of the first relay 5 to be electrically connected to the first normally closed interface 50, so that the first line L1 is electrically connected to the first voltage interface V1 of the first receiving end 70, and the controller 8 controls the second common interface 62 of the second relay 6 to be electrically connected to the second normally closed interface 61, so that the second line L2 is electrically connected to the second voltage interface V2 of the second receiving end 71.
[0057] Please refer to the following: Figure 3 When the first current comparator 3 is set on the second line L2 and the second current comparator 4 is set on the first line L1 (i.e., the first current comparator 3 and the second current comparator 4 are misconnected), the controller 8 controls the first common interface 52 of the first relay 5 to be electrically connected to the first normally open interface 51, so that the first line L1 is electrically connected to the second voltage interface V2 of the first receiving end 70, and the controller 8 controls the second common interface 62 of the second relay 6 to be electrically connected to the second normally open interface 60, so that the second line L2 is electrically connected to the first voltage interface V1 of the second receiving end 71.
[0058] In some embodiments, the metering chip 7 communicates with the controller 8 via a serial peripheral interface or a general asynchronous transceiver.
[0059] In some embodiments, the controller 8 controls the first common interface 52 of the first relay 5 to be electrically connected to the first normally closed interface 50 or the first normally open interface 51 via a general-purpose input / output control, and controls the second common interface 62 of the second relay 6 to be electrically connected to the second normally open interface 60 or the second normally closed interface 61.
[0060] In some embodiments, the controller 8 is also electrically connected to the electronic device 2, and the controller 8 communicates with the electronic device 2 via an RS485 interface or a controller area network.
[0061] In summary, this invention provides a power monitoring device that allows the voltage and current received by the metering chip to correspond to the voltage and current on the same line. This enables power monitoring to be performed even when the current comparator is connected incorrectly, thus eliminating the need for manual maintenance of all current comparators and saving manpower and time costs.
[0062] It should be noted that the above are merely preferred embodiments for illustrating this case, and this case is not limited to the described embodiments. The scope of this case is determined by the appended claims. Furthermore, this case can be modified in various ways by those skilled in the art, but all such modifications will not depart from the protection sought by the appended claims.
Claims
1. An electric power monitoring device, characterized by, Include: An electronic device; An AC power source is electrically connected to the electronic device and supplies power to the electronic device through a first wire and a second wire; A first current converter and a second current converter are used to monitor the power of the first line and the second line; A first relay and a second relay are electrically connected to the first line and the second line, respectively; A metering chip includes a first receiving end and a second receiving end, wherein the first relay is configured to switch a first line electrically connected to the first receiving end and electrically connected to the second receiving end, and the second relay is configured to switch a second line electrically connected to the first receiving end and the second receiving end. The first receiving end is electrically connected to a first current transformer to receive a first current, and the second receiving end is electrically connected to a second current transformer to receive a second current. The first receiving end receives a first voltage via the connected first relay or second relay, and the second receiving end receives a second voltage via the connected first relay or second relay. The metering chip generates a first monitoring power based on the first voltage and the first current, and generates a second monitoring power based on the second voltage and the second current. A controller is electrically connected to the metering chip, the first relay, and the second relay, and is configured to control the metering chip, the first relay, and the second relay. Specifically, when the first current comparator is reverse-connected, the controller controls the metering chip to adjust the first current at the first receiving end in reverse; when the second current comparator is reverse-connected, the controller controls the metering chip to adjust the second current at the second receiving end in reverse. Specifically, when the first current transformer is installed on the first line and the second current transformer is installed on the second line, the controller controls the first relay to electrically connect the first line to the first receiving end, and controls the second relay to electrically connect the second line to the second receiving end. Specifically, when the first current transformer is installed on the second line and the second current transformer is installed on the first line, the controller controls the first relay to electrically connect the first line to the second receiving end, and controls the second relay to electrically connect the second line to the first receiving end.
2. The power monitoring device of claim 1, wherein, When the first current converter is reversed, the controller controls the metering chip to reverse adjust the first current received by the metering chip, and generates the first monitoring power according to the first voltage and the first current after reverse adjustment.
3. The power monitoring device of claim 1, wherein, When the second current converter is reversed, the controller controls the metering chip to reverse the second current received by the metering chip, and generates the second monitoring power according to the second voltage and the reverse-adjusted second current.
4. The power monitoring device of claim 1, wherein, The first relay includes: The system includes a first normally open interface, a first normally closed interface, and a first common interface. The first common interface is electrically connected to the first line, and the controller controls the first common interface of the first relay to be electrically connected to either the first normally closed interface or the first normally open interface, thereby switching the first line between being electrically connected to the first receiving end and being electrically connected to the second receiving end. The second relay includes: The system includes a second normally open interface, a second normally closed interface, and a second common interface, wherein the second common interface is electrically connected to the second line, and the controller controls the second common interface of the second relay to be electrically connected to the second normally open interface or the second normally closed interface, so that the second line switches between being electrically connected to the first receiving end and being electrically connected to the second receiving end.
5. The power monitoring device of claim 4, wherein, The first receiving end includes: The device includes a first voltage interface and a first current interface, wherein the first current interface is electrically connected to the first current transformer, and the first voltage interface is electrically connected to the first normally closed interface and the second normally open interface. The second receiving end includes: A second voltage interface and a second current interface, wherein the second current interface is electrically connected to the second current converter, and the second voltage interface is electrically connected to the first normally open interface and the second normally closed interface.
6. The power monitoring device of claim 5, wherein, When the first current transformer is installed on the first line and the second current transformer is installed on the second line, the controller controls the first common interface of the first relay to be electrically connected to the first normally closed interface, so that the first line is electrically connected to the first voltage interface of the first receiving end, and the controller controls the second common interface of the second relay to be electrically connected to the second normally closed interface, so that the second line is electrically connected to the second voltage interface of the second receiving end.
7. The power monitoring device of claim 5, wherein, When the first current transformer is located on the second line and the second current transformer is located on the first line, the controller controls the first common interface of the first relay to be electrically connected to the first normally open interface, so that the first line is electrically connected to the second voltage interface of the first receiving end, and the controller controls the second common interface of the second relay to be electrically connected to the second normally open interface, so that the second line is electrically connected to the first voltage interface of the second receiving end.
8. The power monitoring device of claim 1, wherein, The metering chip communicates with the controller via a serial peripheral interface or a general asynchronous transceiver.
9. The power monitoring device of claim 1, wherein, The controller uses general-purpose input / output to control the first common interface of the first relay to be electrically connected to the first normally closed interface or the first normally open interface of the first relay, and controls the second common interface of the second relay to be electrically connected to the second normally open interface or the second normally closed interface of the second relay.
10. The power monitoring device of claim 1, wherein, The controller is also electrically connected to the electronic device, and the controller communicates with the electronic device via an RS485 interface or a controller area network.