CN112730974A - Multi-loop electric energy monitoring system and collection box provided with same - Google Patents
Multi-loop electric energy monitoring system and collection box provided with same Download PDFInfo
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- CN112730974A CN112730974A CN202011575661.9A CN202011575661A CN112730974A CN 112730974 A CN112730974 A CN 112730974A CN 202011575661 A CN202011575661 A CN 202011575661A CN 112730974 A CN112730974 A CN 112730974A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims abstract description 67
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 45
- 239000003990 capacitor Substances 0.000 claims description 49
- 230000005611 electricity Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 230000035515 penetration Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 11
- 239000003381 stabilizer Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
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- 230000000149 penetrating effect Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
Abstract
The invention discloses a multi-loop electric energy monitoring system and a collecting box for installing the system, which have simple structure and can improve the precision of collected data, the monitoring system comprises a metering sampling module connected with each power supply loop and a microcontroller electrically connected with the metering sampling module, the metering sampling module comprises a plurality of sampling units and metering units correspondingly connected with the sampling units in series, each sampling unit comprises a voltage transformer and a current transformer, the metering units comprise electric meters, the primary sides of the voltage transformer and the current transformer of each metering sampling module are respectively connected with the power supply loop through connectors, the secondary sides of the voltage transformer and the current transformer are respectively electrically connected with the corresponding electric meters through a voltage stabilizing circuit and a filter circuit, the collecting box is used for installing the electric energy monitoring system and comprises a quadrangular box body and a cover body rotatably installed at the top end of the box body, the cover body covers the top end of the quadrangular box body to form a cavity, and a sampling unit and a metering unit are installed in the cavity.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a multi-loop electric energy monitoring system and a collection box for installing the same.
Background
The power supply and distribution system generally comprises mill's step-down electric substation (or called mill's total step-down electric substation), high voltage distribution lines, workshop electric substation, low pressure distribution lines and consumer, and electric quantity collection mainly relies on electric quantity collection system to realize among the power supply and distribution system, but the power supply and distribution network is complicated by mistake, and there are a large amount of return circuits in the power supply end, need install the electric energy meter in each return circuit just can realize electric quantity collection.
The electric quantity acquisition device for acquiring the electric quantity of each loop in the prior art is complex in structure, an analog-to-digital converter or a data selector is required to be arranged in each acquisition channel, the analog-to-digital converter or the data selector is used for not only making the acquisition channel complex in structure but also influencing the accuracy of acquired data, and the acquired data of the acquisition end needs to be compensated by the analog-to-digital converter or the data selector, so that finally obtained circuit data are software compensation data, the accuracy of original acquired data is lost, the data accuracy is reduced, and meanwhile, the loss is increased.
Disclosure of Invention
The invention provides a multi-loop electric energy monitoring system, which is simple and reasonable in structural design, can improve the precision of acquired data and can reduce loss at the same time, aiming at the problems that the existing multi-loop electric energy acquisition device in the prior art is complex in structure, and the finally acquired electric energy data is low in precision and large in loss.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a multiloop electric energy monitoring system, its including install in each power supply circuit measure sampling module, with the microcontroller that measurement sampling module electricity is connected, its characterized in that, measure sampling module include a plurality of sampling unit, with each the sampling unit corresponds the metering unit of establishing ties, the sampling unit includes two at least voltage transformer, two at least current transformer, the metering unit includes two at least ammeters, each voltage transformer, current transformer's primary side is connected with power supply circuit through the connector respectively, voltage transformer, current transformer's secondary side are connected with corresponding ammeter electricity through voltage stabilizing circuit and filter circuit respectively, the ammeter with the microcontroller electricity is connected, microcontroller passes through serial communication and external terminal communication connection.
It is further characterized in that the method further comprises the steps of,
the electric meter comprises an electric meter chip U18 and an electric meter chip U24;
the voltage transformers comprise a voltage transformer TV1, a voltage transformer TV2, the voltage transformer TV1 comprises three phases: transformer T1, transformer T2, transformer T3, respectively, the voltage transformer TV2 comprising three phases: a transformer T4, a transformer T5 and a transformer T6; the primary sides of the mutual inductor T1, the mutual inductor T2 and the mutual inductor T3 are connected with one power supply loop through a connector J3, the secondary sides of the mutual inductor T1, the mutual inductor T2 and the mutual inductor T3 are connected with pins 12 to 17 of the electric meter chip U18, the primary sides of the mutual inductor T4, the mutual inductor T5 and the mutual inductor T6 are connected with the other power supply loop through a connector J51, and the secondary sides of the mutual inductor T4, the mutual inductor T5 and the mutual inductor T6 are connected with pins 12 to 17 of the electric meter chip U24;
the current transformer comprises a current transformer TL1 and a current transformer TL2, wherein the current transformer TL1 comprises three phases: a transformer L1, a transformer L2, a transformer L3, respectively, the current transformer LV2 comprising three phases: a mutual inductor L9, a mutual inductor L10 and a mutual inductor L8 respectively; the primary sides of the mutual inductor L1, the mutual inductor L2 and the mutual inductor L3 are connected with one power supply loop through a connector J52, the secondary sides of the mutual inductor L1, the mutual inductor L2 and the mutual inductor L3 are connected with 4 pins to 17 pins of the electric meter chip U18 through the voltage stabilizing circuit and the filter circuit, the primary sides of the mutual inductor L9, the mutual inductor L10 and the mutual inductor L8 are connected with the other power supply loop through a connector J58, and the secondary sides of the mutual inductor L9, the mutual inductor L10 and the mutual inductor L8 are connected with 4 pins to 17 pins of the electric meter chip U24 through the voltage stabilizing circuit and the filter circuit;
the voltage stabilizing circuit comprises a voltage stabilizing diode, and the filter circuit is a pi-shaped filter circuit and comprises a resistor and a capacitor;
the electric meter chip U18 and the electric meter chip U24 are both RN8302, and the microcontroller is LPC1766FBD 100;
the serial port communication adopts an RS485 communication interface and a Modbus communication protocol
The collecting box comprises a quadrilateral box body and a cover body rotatably arranged at the top end of the box body, the cover body covers the top end of the quadrilateral box body to form a cavity, at least two groups of sampling units and metering units are arranged in the cavity, each sampling unit comprises a first sampling unit and a second sampling unit, each metering unit comprises a first metering unit and a second metering unit, and the collecting box is characterized in that the first sampling unit and the first metering unit are fixed in the box body, the second sampling unit and the second metering unit are fixed in the cover body,
it is further characterized in that the method further comprises the steps of,
the first metering unit comprises an ammeter chip U18 and peripheral circuits thereof, the first sampling unit comprises a voltage transformer TV1, a current transformer TL1, a filter circuit and a voltage stabilizing circuit which are electrically connected with the ammeter chip U18, the second metering unit comprises the ammeter chip U24 and the peripheral circuits thereof, and the second sampling unit comprises a current transformer TL2, a current transformer TL2, a filter circuit and a voltage stabilizing circuit which are electrically connected with the ammeter chip U24.
A first mounting plate is fixed in the box body, a second mounting plate is fixed on the cover body, the first metering unit and the first sampling unit are mounted on the second mounting plate, and the second metering unit and the second sampling unit are mounted on the first mounting plate;
be provided with respectively on first mounting panel, the second mounting panel and prevent joining conversely the plug-in components mouth, prevent returning the plug-in components mouth including first prevent returning the plug-in components mouth, second prevent returning the plug-in components mouth, first prevent returning the plug-in components mouth and be used for the cable that first metering unit and first sampling unit are connected runs through and fixes, the second prevents returning the plug-in components mouth and is used for the cable that second metering unit and second sampling unit are connected runs through and fixes.
By adopting the structure of the invention, the following beneficial effects can be achieved: 1. the voltage transformer, the primary side of current transformer is connected with each power supply circuit branch road through the connector respectively, be used for gathering the voltage of each power supply circuit branch road respectively, the electric current, voltage transformer, current transformer's secondary side is connected with corresponding ammeter electricity through voltage stabilizing circuit and filter circuit respectively, be used for the voltage to each branch road, the electric current is measured, acquire the power that each power supply circuit consumed, voltage transformer in this application, current transformer's secondary side is direct to be connected with the ammeter, need not to set up analog-to-digital converter or data selector and carry out conversion or compensation to the voltage of gathering, current information, the circuit structure has been simplified, the accuracy of data collection has been improved, the loss has been reduced simultaneously.
2. According to the invention, the electric quantity data of each branch can be respectively collected through the ammeter, namely each loop can be independently collected without being attached to a main loop and other loops, each loop adopts an independent sampling unit and a metering unit, and has independent serial communication, so that the collected data is the original real-time effective data of each branch loop; meanwhile, the multiple electric meters can be used in combination, so that the electric quantity acquisition requirements of different power supply loops can be met, and the use flexibility is high.
3. Compare and install respectively in two collection boxes in current two sets of sampling unit, measurement unit, install at least two sets ofly in this application collection box sampling unit, measurement unit have improved the degree of integrating, have practiced thrift the box material.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a schematic circuit diagram of the voltage transformer of the present invention;
FIG. 3 is a schematic circuit diagram of the current transformer of the present invention;
FIG. 4 is a schematic circuit diagram of a voltage regulator circuit according to the present invention;
FIG. 5 is a circuit schematic of the filter circuit of the present invention;
FIG. 6 is a schematic diagram of an interface circuit for a microcontroller according to the present invention;
FIG. 7 is a schematic diagram of an LED lamp interface circuit of the present invention;
FIG. 8 is a circuit schematic of the voltage regulator circuit of the present invention;
FIG. 9 is a schematic circuit diagram of the control button of the present invention;
FIG. 10 is a schematic circuit diagram of the battery powered power supply of the present invention;
FIG. 11 is a schematic diagram of an interface circuit of the connector J48 of the present invention;
FIG. 12 is a schematic diagram of an interface circuit of the electric meter chip U18 according to the present invention;
FIG. 13 is a schematic diagram of an interface circuit of the electric meter chip U24 according to the present invention;
FIG. 14 is a front view of the container body and its internal structure of the present invention.
Detailed Description
See fig. 1, a multiloop electric energy monitoring system, it is including installing in the measurement sampling module of each power supply loop, the microcontroller of being connected with measurement sampling module electricity, measurement sampling module includes a plurality of sampling unit, correspond the metering unit of establishing ties with each sampling unit, sampling unit includes two at least voltage transformer, two at least current transformer, metering unit includes two at least ammeters, each voltage transformer, current transformer's once side is connected with power supply loop through the connector respectively, voltage transformer, current transformer's secondary side is connected with corresponding ammeter electricity through voltage stabilizing circuit and filter circuit respectively, the ammeter is connected with microcontroller electricity, microcontroller passes through serial communication and external terminal communication connection.
The electric meter in the embodiment comprises an electric meter chip U18 and an electric meter chip U24, wherein the electric meter chip U18 and the electric meter chip U24 are both RN8302 in model number;
referring to fig. 2, the voltage transformers include a voltage transformer TV1, a voltage transformer TV2, and a voltage transformer TV1 includes three phases: transformer T1, transformer T2, transformer T3, respectively, voltage transformer TV2 comprises three phases: a transformer T4, a transformer T5 and a transformer T6; the primary sides of a transformer T1, a transformer T2 and a transformer T3 are connected with one power supply loop through a connector J3, the secondary sides of the transformer T1, the transformer T2 and the transformer T3 are connected with 12 pins to 17 pins of an electric meter chip U18, the primary sides of the transformer T4, the transformer T5 and the transformer T6 are connected with the other power supply loop through a connector J51, and the secondary sides of the transformer T4, the transformer T5 and the transformer T6 are connected with 12 pins to 17 pins of the electric meter chip U24; specific connection relations between a voltage transformer TV1 and between an electricity meter chip U1 and a connector J1 are shown in FIG. 2, a 3 port of the transformer T1 is connected with one ends of resistors R1 and R1 respectively, the other end of the resistor R1 is connected with one end of a capacitor C1 and a 12 pin of the electricity meter chip U1 respectively, a 5 port of the transformer T1 is connected with the other end of the resistor R1 and one end of the resistor R1 respectively, the other end of the resistor R1 is connected with one end of a capacitor C1 and a 13 pin of the electricity meter chip U1 respectively, the other ends of the capacitors C1 and C1 are grounded, a 1 port of the transformer T1 is connected with one end of the resistor R1, the other end of the resistor R1 and the 1 pin of the connector J1 respectively, a 3 port of the transformer T1 is connected with one ends of the resistors R1 and R1 respectively, the other end of the capacitor C1 and a 14 pin of the electricity meter chip U1, a 5 port of the transformer T1, The other ends of capacitors C22 and C23 are grounded, a port 1 of a transformer T2 is connected with one end of a resistor R57, the other end of a resistor R57 is connected with a pin 2 of a connector J3, a port 3 of a transformer T3 is respectively connected with one ends of resistors R60 and R62, the other end of a resistor R60 is respectively connected with one end of a capacitor C26 and a pin 16 of the electric meter chip U18, a port 5 of the transformer T18 is respectively connected with the other end of a resistor R18 and one end of a resistor R18, the other end of the resistor R18 is respectively connected with one end of the capacitor C18 and a pin 17 of the electric meter chip U18, the other ends of the capacitors C18 and C18 are grounded, a port 1 of the transformer T18 is connected with one end of the resistor R18, the other end of the resistor R18 is connected with a pin 3 of the connector J18, and pins 2 of the transformers T18 are;
the 3 port of a mutual inductor T4 is respectively connected with one end of a resistor R4 and one end of a resistor R4, the other end of the resistor R4 is respectively connected with one end of a capacitor C4 and a 12 pin of an electric meter chip U4, the 5 port of the mutual inductor T4 is respectively connected with the other end of the resistor R4 and one end of the resistor R4, the other end of the resistor R4 is respectively connected with one end of the capacitor C4 and a 13 pin of the electric meter chip U4, the other ends of the capacitors C4 and C4 are grounded, the 1 port of the mutual inductor T4 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with one end of a connector 51, the 3 port of the mutual inductor T4 is respectively connected with one end of the resistors R4 and R4, the other end of the resistor R4 is respectively connected with one end of the capacitor C4 and the pin of the electric meter chip U4, the other end of the capacitor C4 and the other end of the resistor R4 is grounded, and one end of the resistor R4, the other end of the resistor R89 is connected with a 2-pin of a connector J58, a 3-port of the transformer T6 is connected with one ends of resistors R92 and R94 respectively, the other end of the resistor R92 is connected with one end of a capacitor C75 and a 16-pin of an electric meter chip U24 respectively, a 5-port of the transformer T3 is connected with the other end of a resistor R94 and one end of a resistor R95 respectively, the other end of the resistor R95 is connected with one end of a capacitor C76 and a 17-pin of an electric meter chip U24 respectively, the other ends of the capacitors C76 and C75 are grounded, a 1-port of the transformer T6 is connected with one end of a resistor R93, the other end of the resistor R93 is connected with a 3-pin of a connector J51, and 2-pins of.
Referring to fig. 3, the current transformer includes a current transformer TL1, a current transformer TL2, and a current transformer TL1 includes three phases: transformer L1, transformer L2, transformer L3, respectively, current transformer LV2 comprises three phases: a mutual inductor L9, a mutual inductor L10 and a mutual inductor L8 respectively; the primary sides of a transformer L1, a transformer L2 and a transformer L3 are connected with one power supply loop through a connector J52, the secondary sides of the transformer L1, the transformer L2 and the transformer L3 are connected with 4 pins-17 pins of an electric meter chip U18 through a voltage stabilizing circuit (see figure 4) and a filter circuit (see figure 5), the primary sides of the transformer L9, the transformer L10 and the transformer L8 are connected with the other power supply loop through a connector J58, and the secondary sides of the transformer L9, the transformer L10 and the transformer L8 are connected with 4 pins-17 pins of the electric meter chip U24 through a voltage stabilizing circuit and a filter circuit; the voltage stabilizing circuit (see fig. 4) comprises a voltage stabilizing diode, and the filter circuit (see fig. 5) is a pi-shaped filter circuit and comprises a resistor and a capacitor.
The secondary side of the current transformer is connected with the electric meter chips U18 and U24 through a filter circuit and a voltage stabilizing circuit in a specific connection manner that: the 3 and 1 ports of the mutual inductor L1 are respectively connected with the cathode of a voltage-stabilizing diode D10, and the anode of the voltage-stabilizing diode D10 is grounded; the 3 port and the 1 port of the mutual inductor L2 are respectively connected with the cathode of a voltage stabilizing diode D12, the 3 port is connected with one ends of resistors R38 and R39, the 1 port is connected with one ends of resistors R40 and R41, the anode of the voltage stabilizing diode D12 is grounded, the other end of a resistor R38 is respectively connected with one end of a capacitor C5 and the 4 pin of an ammeter chip U18, the other end of a resistor R41 is connected with one end of a capacitor C7 and the 5 pin of the ammeter chip U18, and the other ends of the capacitors C5 and C7 and the other ends of resistors R39 and R40; the 3 port and the 1 port of the mutual inductor L2 are respectively connected with the cathode of a voltage stabilizing diode D12, the 3 port is connected with one ends of resistors R42 and R43, the 1 port is connected with one ends of resistors R45 and R46, the other end of the resistor R42 is respectively connected with one end of a capacitor C8 and the 8 pin of an ammeter chip U18, the other end of a resistor R46 is respectively connected with one end of a capacitor C12 and the 8 pin of the ammeter chip U18, the other ends of the capacitors C8 and C12, the resistors R43 and R45 are grounded, and the anode of the voltage stabilizing diode D13 is grounded; the 3 port and the 1 port of the mutual inductor L3 are respectively connected with the cathode of a voltage stabilizing diode D13, the 3 port is connected with one ends of resistors R48 and R49, the 1 port is connected with one ends of resistors R50 and R51, the other end of the resistor R48 is respectively connected with one end of a capacitor C16 and the 10 pin of an ammeter chip U18, the other end of a resistor R51 is respectively connected with one end of a capacitor C21 and the 11 pin of the ammeter chip U18, the other ends of the capacitors C16, C21, the resistors R49 and R50 are grounded, and the anode of the voltage stabilizing diode D13 is grounded.
The 3 port and the 1 port of the mutual inductor L9 are respectively connected with the cathode of a voltage stabilizing diode D19, wherein the 3 port is also connected with one ends of resistors R70 and R71, the 1 port is also connected with one ends of resistors R72 and R73, the other end of the resistor R70 is respectively connected with one end of a capacitor C52 and the 4 pin of an ammeter chip U24, the other end of a resistor R73 is respectively connected with one end of the capacitor C53 and the 5 pin of the ammeter chip U24, the other ends of the capacitors C52 and C53, the resistors R71 and R72 are grounded, and the anode of the voltage stabilizing diode D19 is; the 3 port and the 1 port of the mutual inductor L10 are respectively connected with the cathode of a voltage stabilizing diode D21, wherein the 3 port is also connected with one ends of resistors R74 and R76, the 1 port is also connected with one ends of resistors R78 and R79, the other end of the resistor R74 is respectively connected with one end of a capacitor C54 and the 7 pin of an ammeter chip U24, the other end of the resistor R79 is respectively connected with one end of a capacitor C58 and the 8 pin of the ammeter chip U24, the other ends of the capacitors C54 and C58, the other ends of the resistors R76 and R78 are grounded, and the anode of the voltage stabilizing diode D; the 3 port and the 1 port of the mutual inductor L8 are respectively connected with the cathode of a voltage stabilizing diode D23, wherein the 3 port is also connected with one ends of resistors R80 and R81, the 1 port is also connected with one ends of resistors R82 and R83, the other end of the resistor R80 is respectively connected with the 10 pin of an electric meter chip U24 and one end of a capacitor C64, the other end of the resistor R83 is respectively connected with one end of a capacitor C67 and the 11 pin of an electric meter chip U24, the other ends of the resistors R81 and R82, the other ends of the capacitors C64 and C67 are grounded, and the anode of the voltage stabilizing; the cathode of the voltage stabilizing diode D9 is respectively connected with pins 12 and 13 of the ammeter U18, the anode of the voltage stabilizing diode D9 is grounded, the cathode of the voltage stabilizing diode D11 is respectively connected with pins 14 and 15 of the ammeter U18, the anode of the voltage stabilizing diode D11 is grounded, the cathode of the voltage stabilizing diode D14 is respectively connected with pins 16 and 17 of the ammeter U18, and the anode of the voltage stabilizing diode D14 is grounded; the cathode of the voltage stabilizing diode D18 is respectively connected with pins 12 and 13 of the ammeter U51, the anode of the voltage stabilizing diode D18 is grounded, the cathode of the voltage stabilizing diode D20 is respectively connected with pins 14 and 15 of the ammeter U51, the anode of the voltage stabilizing diode D20 is grounded, the cathode of the voltage stabilizing diode D22 is respectively connected with pins 16 and 17 of the ammeter U51, and the anode of the voltage stabilizing diode D22 is grounded.
See fig. 6, the model of the microcontroller is LPC1766FBD100, the meter chip U18, the meter chip U24 is connected with pins 76 to 81 of the microcontroller U29, the microcontroller is connected with an external terminal through an RS485 communication interface or a Modbus communication protocol, the microcontroller is connected with a peripheral circuit, the peripheral circuit includes an LED lamp interface circuit, see fig. 7, the LED lamp interface circuit includes LED1, LED2, and LED3 interface circuit, pin 1 of LED1 is connected with one end of resistor R129, pin 2 of LED1 is connected with pin 46 of microcontroller U29, pin 3 of LED1 is connected with one end of resistor R128, the other ends of resistors R129 and R128 are respectively connected with a voltage source VDD, pin 1 of LED2 is connected with one end of resistor R127, pin 3 of LED2 is connected with one end of resistor R192, pin 2 of LED2 is connected with pin 2 of microcontroller U29, pin 4 of LED2 is connected with pin 47 of microcontroller U29, pin 1 of LED3 is connected with one end of resistor R125, and pin 3 of LED3 is connected with one end of resistor R, a pin 2 of the LED3 is connected with a pin 49 of the microcontroller U29, and a pin 4 of the LED3 is connected with a pin 98 of the microcontroller U29; the voltage regulating circuit comprises a low-voltage-drop voltage stabilizer U4, see fig. 8, and is used for regulating power supply voltage to obtain 3.3V stable direct current voltage and supplying power to the LED lamp, wherein a 1 pin of the low-voltage-drop voltage stabilizer U4 is grounded, 2 pins of the low-voltage stabilizer U4 are respectively connected with one ends of a voltage source VDD, capacitors C83, C84, C85 and C86, anodes of active capacitors C41 and C81, 4 pins of the low-voltage-drop voltage stabilizer U4, the other ends of the capacitors C83 to C86, cathodes of the active capacitors C41 and C81 are grounded, 3 pins of the voltage stabilizer U4 are respectively connected with one end of a capacitor C80, an anode of the active capacitor C79 and a voltage source VCC, and the other ends of the active capacitor C79 and the capacitor; the peripheral circuit comprises a control key circuit, as shown in fig. 9, the control key circuit comprises keys SW1 and SW2 for realizing the starting control of a microcontroller U29, a pin 1 of the key SW1 is respectively connected with one end of a resistor R99 and a pin 44 of a microcontroller chip U29, and a pin 2 of the key SW1 is respectively connected with one end of a resistor R100 and a pin 43 of a microcontroller U29; the key SW2 is connected with pins 40, 39, 33 and 32 of the microcontroller U29; the peripheral circuit further comprises a battery power supply, see fig. 10, for providing a stable direct current power supply for the microcontroller U29, the battery power supply comprises a battery BT1, the anode of the battery BT1 is connected to the anode of the diode D30 and one end of the capacitor C100, the cathode of the diode D30 is connected to the cathode of the diode D29, one end of the capacitor C102 and the power supply VBAT, the other end of the capacitor C100 and the cathode of the battery BT1 are grounded, and the other end of the capacitor C102 is grounded; the peripheral circuit comprises a connector J48, see FIG. 11, for connecting the microcontroller U29 with an external device, pins 1 and 2 of a connector J48 are connected with a voltage source VDD, pin 3 of a connector J48 is connected with one end of a resistor R117 and pin 4 of a microcontroller U29, pin 5 of a connector J48 is connected with one end of a resistor R118 and pin 3 of a microcontroller U29, pin 7 of a connector J48 is connected with one end of a resistor R119 and pin 4 of a microcontroller U29, pin 9 of a connector J48 is connected with one end of a resistor R131 and pin 5 of a microcontroller U29, pin 11 of a connector J48 is connected with one end of a resistor R120 and pin 100 of the microcontroller U29, pin 13 of a connector J48 is connected with one end of a resistor R121 and pin 2 of a microcontroller U29, pin 15 of a connector J48 is connected with pin 4 of a microcontroller U29, the other ends of resistors R117-R121 are connected with the voltage source VDD, and the resistors R130, R131 and R131 are connected with the voltage source VDD 131, The other end of R132 is grounded, and pins 4, 6, 8, 10, 12, 14, 16, 18, 20 of the connector J48 are grounded.
Referring to fig. 14, the collection box using the multi-loop electric energy monitoring system comprises a quadrilateral box body 1 and a cover body 2 rotatably mounted at the top end of the box body 1, the cover body 2 covers the top end of the quadrilateral box body 1 to form a cavity, a sampling unit and a metering unit are mounted in the cavity, the sampling unit comprises a first sampling unit and a second sampling unit, the metering unit comprises a first metering unit and a second metering unit, the first sampling unit and the first metering unit 10 are fixed in the box body 1, the second sampling unit and the second metering unit 20 are fixed in the cover body 2, the first metering unit comprises an electric meter chip U18 and a peripheral circuit thereof, the first sampling unit comprises a voltage transformer TV1, a current transformer TL1, a filter circuit and a voltage stabilizing circuit which are electrically connected with the electric meter chip U18, the second metering unit comprises an electric meter chip U24 and a peripheral circuit thereof, and the second sampling unit comprises a current transformer TL2, a current transformer TV, a, The current transformer TL2, a filter circuit and a voltage stabilizing circuit.
A first mounting plate 11 is fixed in the box body 1, a second mounting plate 21 is fixed on the cover body 2, a first metering unit and a first sampling unit are mounted on the second mounting plate 21, and a second metering unit and a second sampling unit are mounted on the first mounting plate 11;
the first mounting plate 11 and the second mounting plate 21 are respectively provided with an anti-reverse-connection plug port, the anti-reverse-connection plug port comprises a first anti-reverse-connection plug port 12 and a second anti-reverse-connection plug port 22, the first anti-reverse-connection plug port 12 is used for penetrating, arranging and fixing a cable connected with the first metering unit and the first sampling unit, the second anti-reverse-connection plug port 22 is used for penetrating and fixing a cable connected with the second metering unit and the second sampling unit, and the anti-reverse-connection plug port can arrange and fix the cable by adopting the prior art; the microcontroller U29 and its peripheral circuits are mounted within the case 1 in this example. Before the collection box leaves a factory, the sampling unit and the metering unit are pre-installed in the box body 1, and the box body is directly installed on site, so that wiring time is saved, and installation efficiency is improved; one of the two groups of sampling units and the metering unit can be used, and the two groups of sampling units and the metering unit can also be combined for common use, so that the application range is improved; during the use, can close the lid, make two sets of sampling units, measurement unit be located same cavity, compare in the mode of installing respectively in two vasculars, practiced thrift installation space.
The invention is applied to the electric quantity data acquisition of a power supply loop in a power supply and distribution system, the load is accurately measured in terms of items, and the data is uploaded to a cloud platform, 1 main loop, 2 branch loops or 6 single devices are provided, each main loop, branch loop or each single device can adopt the circuit connection structure same as that in the figures 2-13, the acquired electric quantity data comprises electric parameter voltage, current, power, electric energy and the like, the voltage stabilizing circuit can ensure the voltage stability acquired by a current transformer, the filter circuit adopts a pi-shaped filter circuit, when the current transformer is adopted to acquire the current, the current in each branch can be filtered, the signal interference of other circuits is filtered, and the measurement accuracy is further improved.
The above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and concept of the present invention are to be considered as included within the scope of the present invention.
Claims (9)
1. The utility model provides a multiloop electric energy monitoring system, its including install in each power supply circuit measure sampling module, with the microcontroller that measurement sampling module electricity is connected, its characterized in that, measure sampling module include a plurality of sampling unit, with each the sampling unit corresponds the metering unit of establishing ties, the sampling unit includes two at least voltage transformer, two at least current transformer, the metering unit includes two at least ammeters, each voltage transformer, current transformer's primary side is connected with power supply circuit through the connector respectively, voltage transformer, current transformer's secondary side are connected with corresponding ammeter electricity through voltage stabilizing circuit and filter circuit respectively, the ammeter with the microcontroller electricity is connected, microcontroller passes through serial communication and external terminal communication connection.
2. The multi-loop power monitoring system as claimed in claim 1, wherein the electric meter comprises an electric meter chip U18 and an electric meter chip U24, and the electric meter chip U18 and the electric meter chip U24 are both RN 8302.
3. The multi-loop power monitoring system as claimed in claim 2, wherein the voltage transformers comprise a voltage transformer TV1, a voltage transformer TV2, and the voltage transformer TV1 comprises three phases: transformer T1, transformer T2, transformer T3, respectively, the voltage transformer TV2 comprising three phases: a transformer T4, a transformer T5 and a transformer T6; the primary sides of the transformer T1, the transformer T2 and the transformer T3 are connected with one power supply loop through a connector J3, the secondary sides of the transformer T1, the transformer T2 and the transformer T3 are connected with pins 12 to 17 of the electric meter chip U18, the primary sides of the transformer T4, the transformer T5 and the transformer T6 are connected with the other power supply loop through a connector J51, and the secondary sides of the transformer T4, the transformer T5 and the transformer T6 are connected with pins 12 to 17 of the electric meter chip U24.
4. The multi-loop power monitoring system as claimed in claim 3, wherein the current transformers comprise a current transformer TL1, a current transformer TL2, and the current transformer TL1 comprises three phases: a transformer L1, a transformer L2, a transformer L3, respectively, the current transformer LV2 comprising three phases: a mutual inductor L9, a mutual inductor L10 and a mutual inductor L8 respectively; the primary sides of the mutual inductor L1, the mutual inductor L2 and the mutual inductor L3 are connected with one power supply loop through a connector J52, the secondary sides of the mutual inductor L1, the mutual inductor L2 and the mutual inductor L3 are connected with 4 pins to 17 pins of the electric meter chip U18 through the voltage stabilizing circuit and the filter circuit, the primary sides of the mutual inductor L9, the mutual inductor L10 and the mutual inductor L8 are connected with the other power supply loop through a connector J58, and the secondary sides of the mutual inductor L9, the mutual inductor L10 and the mutual inductor L8 are connected with 4 pins to 17 pins of the electric meter chip U24 through the voltage stabilizing circuit and the filter circuit.
5. The multi-loop power monitoring system as claimed in claim 4, wherein the voltage regulator circuit comprises a zener diode, and the filter circuit is a pi-shaped filter circuit comprising a resistor and a capacitor.
6. The collection box for installing the electric energy monitoring system according to claim 1 or 5, wherein the collection box comprises a quadrangular box body and a cover body rotatably installed at the top end of the box body, the cover body covers the top end of the quadrangular box body to form a cavity, the sampling unit and the metering unit are installed in the cavity, the sampling unit comprises a first sampling unit and a second sampling unit, and the metering unit comprises a first metering unit and a second metering unit.
7. The collection box of claim 6, wherein said first metering unit comprises said meter chip U18 and its peripheral circuitry, said first sampling unit comprises said voltage transformer TV1, current transformer TL1, filter circuitry, and regulation circuitry electrically connected to said meter chip U18, said second metering unit comprises said meter chip U24 and its peripheral circuitry, and said second sampling unit comprises said current transformer TL2, current transformer TL2, filter circuitry, and regulation circuitry electrically connected to said meter chip U24.
8. The collection box of claim 7, wherein a first mounting plate is secured to the box body, a second mounting plate is secured to the cover body, and wherein the first metering unit and the first sampling unit are mounted to the second mounting plate and the second metering unit and the second sampling unit are mounted to the first mounting plate.
9. The collection box of claim 8, wherein the first mounting plate and the second mounting plate are each provided with an anti-back connector port, the anti-back connector ports comprise a first anti-back connector port and a second anti-back connector port, the first anti-back connector port is used for the penetration and fixation of a cable connecting the first metering unit and the first sampling unit, and the second anti-back connector port is used for the penetration and fixation of a cable connecting the second metering unit and the second sampling unit.
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| CN202011575661.9A CN112730974A (en) | 2020-12-28 | 2020-12-28 | Multi-loop electric energy monitoring system and collection box provided with same |
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| CN202011575661.9A CN112730974A (en) | 2020-12-28 | 2020-12-28 | Multi-loop electric energy monitoring system and collection box provided with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210430 |