CN217693328U - Measurement switch module circuit based on broadband carrier communication controller - Google Patents

Abstract

The utility model provides a switch module circuit of measurationing based on broadband carrier communication controller belongs to carrier communication technical field. The utility model discloses an exchange carrier wave interface and weak current interface that link to each other with intelligence measurement switch main part still include power module, carrier communication module, the metering module who links to each other with carrier communication module, still include the characteristic current generation module who links to each other with carrier communication module output, wherein, metering module's input links to each other with exchanging carrier wave interface and weak current interface output respectively, characteristic current generation module's output links to each other with exchanging carrier wave interface. The utility model has the advantages of the circuit is succinct, with low costs, the low power dissipation, the reliability is high.

Description

Measurement switch module circuit based on broadband carrier communication controller

Technical Field

The utility model relates to a broadband carrier communication technical field, concretely relates to switch module circuit of measurationing based on broadband carrier communication controller.

Background

The stable power supply system provides powerful support for economic development of China, and domestic power grid companies have built intelligent power grid systems at present, so that an intelligent power information acquisition system based on broadband carrier communication is realized, and stable operation of distribution in a transformer area is guaranteed. The accurate power utilization information basic ledger is an important basis for developing a series of advanced applications such as analysis of line loss rate of a transformer area, analysis and treatment of three-phase imbalance, distribution network fault positioning, issuing of emergency repair work orders and the like. Due to the change and adjustment of the power load, the fact that the electric energy meter file is not consistent with the actual state in the operation process of a power grid company due to various management or technical reasons, the problem that the attribution definition of the station area of the cable power supply user is difficult to determine, and the like, and the problem that the machine account is disordered.

At present, in the operation and the management of measurement automation collection system, the power consumption administrative department is consumption reduction and loss reduction, need to the three-phase power consumption balance in platform district, line loss calculates and the unusual trouble of circuit, need quantitative analysis, real time monitoring and abnormal alarm, consequently, power grid company is advancing to realize power consumption information platform account wisdom management based on broadband carrier communication power information collection system's platform district topology recognition function in recent years, wherein there are a large amount of branch switches on the circuit in platform district from the power supply that can not open, so intelligent measurement switch also takes place.

Because the intelligent measuring switch meets the safety requirement and the internal structure requirement, the external measuring switch module box is adopted to realize intellectualization. The current measuring switch module scheme is formed by splicing a main controller with strong processing capacity, a measuring module, a broadband carrier communication module, a clock module and the like, and the scheme has the disadvantages of high cost, high power consumption, complex circuit and tense internal structure, thus causing serious heating of the measuring switch and reduced reliability.

SUMMERY OF THE UTILITY MODEL

For solving the problem in the prior art, the utility model provides a switch module circuit surveys based on broadband carrier communication controller.

The utility model discloses measuration switch module circuit based on broadband carrier communication controller, include the exchange carrier interface and the light current interface that link to each other with intelligence measurement switch main part, still include power module, carrier communication module, the metering module who links to each other with carrier communication module, still include the characteristic current who links to each other with carrier communication module output and take place the module, wherein, metering module's input links to each other with exchange carrier interface and light current interface output respectively, the output that characteristic current took place the module links to each other with exchange carrier interface.

The utility model discloses make further improvement, carrier communication module includes carrier communication control chip circuit, the carrier communication signal transceiver circuit who links to each other with carrier communication control chip circuit, still including setting up carrier communication signal transceiver circuit and exchange carrier signal coupling circuit between the carrier interface.

The utility model discloses make further improvement, metering module includes measurement chip circuit, alternating voltage sampling circuit and current sampling circuit, wherein, measurement chip circuit respectively with alternating voltage sampling circuit, light current interface and current sampling circuit's output links to each other, in addition, measurement chip circuit and carrier communication control chip circuit signal line are connected.

The utility model discloses make further improvement, the measurement chip circuit includes measurement chip U6, and with the memory UE that measurement chip U6 links to each other, measurement chip U6 adopts RN2026 measurement chip, and inside CPU can independently realize measurement function and correctable high accuracy clock function.

The utility model discloses make further improvement, exchange carrier interface and insert four ways signal UA, UB, UC, UN of power, it is the same that alternating voltage sampling circuit includes three structure, gathers the branch road of UA, UB, UC voltage respectively, and the UA branch road includes the resistance that a plurality of concatenated, and the resistance that concatenates one end connects exchange carrier interface UA circuit, another termination difference signal conversion unit, difference signal conversion unit includes resistance R28, resistance R30 and electric capacity C42, wherein, resistance R30 and electric capacity C42 are parallelly connected, and series resistance end and first difference signal output end are connected respectively to one end, and the other end connects second difference signal output end and resistance R47's one end respectively, resistance R47's other end ground connection, measurement chip U6 is equipped with six voltage detection feet, links to each other with six difference signal output ends of three branch road respectively.

The utility model discloses make further improvement, current sampling circuit includes the current sampling branch road that three routes structure is the same, and the input of every current sampling branch road connects two current transformer difference signals of every looks of weak electrical interface, and output difference signal gives two voltage detection feet of measurement chip U6, wherein, first electric current adopts the current acquisition unit that the branch road includes the mirror image setting, current acquisition unit includes resistance R29, and sets up respectively the ground resistance R32 and the ground capacitance C46 at resistance R29 both ends, resistance R29's both ends connect weak electrical interface and one of them current detection foot of measurement chip U6 respectively.

The utility model discloses do the further improvement, carrier communication control chip circuit adopts broadband carrier communication SOC chip SPE7101.

The utility model discloses do further improvement, power module includes:

the power failure detection unit is used for detecting whether the measurement switch module circuit is powered down or not;

an AC to DC unit: the measuring switch module circuit is used for converting alternating current commercial power into 12V power and providing first power supply voltage for the measuring switch module circuit;

a voltage stabilization unit: the voltage regulator is used for converting the 12V power supply into a 3.3V regulated power supply and providing the second power supply voltage for the measurement switch module circuit.

The utility model discloses do further improvement, characteristic current generation module is including keeping apart opto-coupler U4, current switch U5 and MOS pipe Q2, wherein, keep apart opto-coupler U4's former limit and connect carrier communication module output, keep apart 3 feet on the vice limit of opto-coupler U5 and connect current switch U5's messenger ability foot 1, vice limit 4 connects MOS pipe Q2's source electrode and switching current U5's input foot 3 respectively, current switch U5's output foot 5, 6 meet the back, connect MOS pipe Q2's source electrode through resistance, MOS pipe Q2's drain electrode connects the exchange carrier interface, MOS pipe Q2's grid passes through resistance and connects MOS pipe Q2's drain electrode, when the equivalent is surveyed the switch and is received platform district discernment order through carrier communication module, carrier communication module control characteristic current generation module produces characteristic current signal on exchanging city electric wire way.

Compared with the prior art, the beneficial effects of the utility model are that: because present broadband carrier communication controller chip powerful, the function of measuring the switch module must all realize through broadband carrier communication, and the present case is with broadband carrier communication controller SPE7101 as main controller, and it is big to have avoided additionally setting up the inside module that main control unit caused, and is with high costs, the defect such as serious generates heat, the utility model has the advantages of the circuit is succinct, with low costs, low power dissipation, reliability are high, effectively improve the reliability of power consumption information acquisition system operation and platform district power distribution's stability.

Drawings

In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic circuit diagram of the carrier communication control chip of the present invention;

fig. 3 is a schematic circuit diagram of the middle carrier communication signal transceiver circuit and the carrier signal coupling circuit of the present invention;

fig. 4 is a schematic diagram of the circuit of the characteristic current generating module, the ac carrier interface, and the ac-to-dc unit of the present invention;

FIG. 5 is a schematic circuit diagram of a metering chip circuit according to the present invention;

fig. 6 is a schematic circuit diagram of the ac voltage sampling circuit according to the present invention;

FIG. 7 is a circuit schematic of a current sampling circuit;

fig. 8 is a schematic diagram of a weak current interface and power module circuit.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses an exchange carrier interface and weak current interface that link to each other with intelligence measurement switch main part still include power module, carrier communication module, the metering module who links to each other with carrier communication module, still include the characteristic current who links to each other with carrier communication module output and take place the module, wherein, metering module's input links to each other with exchanging carrier interface and weak current interface output respectively, the output that characteristic current takes place the module links to each other with exchanging carrier interface.

Specifically, the carrier communication module includes a carrier communication control chip circuit, a carrier communication signal transceiver circuit connected to the carrier communication control chip circuit, and a carrier signal coupling circuit disposed between the carrier communication signal transceiver circuit and the ac carrier interface.

The metering module comprises a metering chip circuit, an alternating voltage sampling circuit and a current sampling circuit, wherein the metering chip circuit is respectively connected with the output ends of the alternating voltage sampling circuit, the weak current interface and the current sampling circuit, and in addition, the metering chip circuit is connected with a signal line of a carrier communication control chip circuit.

The function of each module is as follows:

the power module of this example includes an ac to dc unit: the power supply is used for converting alternating current mains supply input by the alternating current carrier interface into a 12V power supply and providing the 12V power supply voltage for the measurement switch module circuit; and a voltage stabilizing unit: the voltage measuring switch module circuit is used for converting a 12V power supply into a 3.3V stabilized voltage supply and providing the 3.3V power supply voltage for an internal chip of the measuring switch module circuit.

In the embodiment, the power supply of the weak current interface 12V power supply of the measurement switch module is weak, so that the power supply from the alternating current mains supply is isolated and reduced to work by each functional circuit of the 12V power supply measurement switch module. In the embodiment, a 12V power supply directly supplies power to a carrier signal sending circuit, and 3.3V power supply voltage supplies power to other chip circuits to work.

The carrier signal coupling circuit couples the carrier signal amplified by the power of the carrier signal receiving and transmitting circuit to the AC city line for transmission, and receives the carrier signal transmitted back from the AC city line and transmits the carrier signal to the carrier signal receiving and transmitting circuit to be processed into a signal which can be recognized by the carrier communication control chip for data analysis.

The characteristic current generating circuit directly generates a characteristic current signal on an alternating current commercial power line for the upper-level identification. The alternating current commercial power converts the voltage signal into a signal which can be sampled and measured by the metering chip through the alternating current voltage sampling circuit.

The carrier communication control chip is responsible for the processing of sending and receiving of the carrier signal and controlling the characteristic current generating circuit to generate the characteristic current signal on the alternating current commercial power and the on-off state identification report of the weak current interface after receiving the station area identification command.

The metering chip circuit is used for sampling a current signal of the weak current interface, converting the current sampling current into a current signal and calculating an alternating current parameter together with the power signal.

Because present broadband carrier communication controller chip powerful, the function of measuring the switch module must all realize through broadband carrier communication, and the present case is with broadband carrier communication controller SPE7101 as main controller, and it is big to have avoided additionally setting up the inside module that main control unit caused, and is with high costs, the defect such as serious generates heat, the utility model discloses only need power module and metering module can realize relevant function to it is succinct to have the circuit, with low costs, the low power dissipation, advantage that the reliability is high, effectively improves the reliability of power consumption information acquisition system operation and platform district electric power distribution's stability.

As shown in FIG. 2, the utility model discloses carrier communication control chip circuit adopts broadband carrier communication SOC chip SPE7101 (U1), and SPE7101 is broadband carrier communication SOC chip, and its operating system is a microcontroller system. Besides modulation and demodulation of carrier communication signals, communication transmission and signal control can be realized through an input/output port, pins 44 and 45 (TX _ VON and TX _ VOP) of the wideband carrier communication SOC chip U1 are carrier modulation signal generation pins, pins 40 and 41 (RX _ VIP and RX _ VIN) are carrier modulation signal receiving pins, pins 17 and 29 (GPIO 5 and GPIO 5) are used for serial port communication with the metering chip RN2026, and a pin 32 (GPIO 7) is used as a characteristic current generation control signal. 36 The (GPIO 10) pin is used as a switch state signal detection.

In addition, the carrier communication control chip circuit further comprises a crystal oscillator X1, a Flash memory and a reset unit, wherein the reset unit comprises a resistor R45 and grounding capacitors C56 and C57, one end of the resistor R45 is connected with a power supply, and the other end of the resistor R45 is respectively connected with the grounding capacitors C56 and C57 and a 37 pin of the broadband carrier communication SOC chip U1, so that a soft reset function is realized.

As shown in fig. 2, 5 and 8, the measurement Switch status is transmitted to the 36 pins of the wideband carrier communication chip (U1) through the 12 pins (Switch) of the weak electrical interface P1, and is reported as a Switch status signal detection through carrier communication.

As shown in fig. 3, the SPE7101 wideband carrier communication chip (U1) of this example sends carrier modulation signals through pins 44 and 45 (TX _ VON and TX _ VOP), then passes through a U3 amplifier circuit, amplifies the power of the carrier signal, and sends the amplified carrier signal to the line of A, B, C, N (J3) through coupling circuits (T2, C72, C75 and C78). Meanwhile, after the carrier communication signal is obtained through the coupling circuit and processed by the receiving circuit, the processed signal is transmitted to pins 40 and 41 (RX _ VIP and RX _ VIN) of the broadband carrier communication chip U1, and the broadband carrier communication chip analyzes the data.

As shown in fig. 4, the characteristic current generation module of this embodiment includes an isolation optocoupler U4, a current switch U5, and an MOS transistor Q2, wherein a primary side of the isolation optocoupler U4 is connected to an output end of the carrier communication module, a secondary side 3 of the isolation optocoupler U5 is connected to an enable pin 1 of the current switch U5, the secondary side 4 is connected to a source of the MOS transistor Q2 and an input pin 3 of the switch current U5, respectively, after the output pins 5 and 6 of the current switch U5 are connected, the output pins are connected to a source of the MOS transistor Q2 through a resistor, a drain of the MOS transistor Q2 is connected to an ac carrier interface, a gate of the MOS transistor Q2 is connected to a drain of the MOS transistor Q2 through a resistor, and when the equivalent load switch receives a platform area identification command through the carrier communication module, the carrier communication module controls the characteristic current generation module to generate a characteristic current signal on an ac commercial power line.

As shown in fig. 3 and 4, J3 is an ac carrier interface, the power chip U2 is configured to convert ac power into 12V dc power, the power chip U2 of the ac-to-dc unit takes power from the ac interface J3, and the isolation and voltage stabilization provides a 12V power supply to provide a working power supply for the carrier signal amplifier chip U3.

As shown in fig. 5, the metering chip circuit of this example includes a metering chip U6, and a memory UE connected to the metering chip U6, the metering chip U6 adopts an RN2026 metering chip, and an internal CPU can independently implement a metering function and a calibratable high-precision clock function.

As shown in fig. 6, the ac carrier interface of this embodiment is connected to four power supply signals UA, UB, UC, and UN, the ac voltage sampling circuit includes three branches having the same structure and respectively collecting voltage of UA, UB, and UC, the UA branch includes a plurality of serially connected resistors, one end of the serially connected resistors is connected to the UA line of the ac carrier interface, the other end is connected to the differential signal conversion unit, the differential signal conversion unit includes a resistor R28, a resistor R30, and a capacitor C42, wherein the resistor R30 is connected in parallel with the capacitor C42, one end of the serially connected resistor is connected to the first differential signal output end, the other end of the serially connected resistors is connected to the second differential signal output end and one end of the resistor R47, the other end of the resistor R47 is grounded, and the metering chip U6 is provided with six voltage detection pins connected to the six differential signal output ends of the three branches.

As shown in fig. 7, the current sampling circuit of this embodiment includes three current sampling branches having the same structure, an input end of each current sampling branch is connected to two current transformer differential signals of each phase of the weak electrical interface, and an output end of each current sampling branch outputs a differential signal to two voltage detection pins of the metering chip U6, wherein a first current sampling branch includes a current collection unit arranged in a mirror image manner, the current collection unit includes a resistor R29, and a ground resistor R32 and a ground capacitor C46 respectively arranged at two ends of the resistor R29, and two ends of the resistor R29 are respectively connected to the weak electrical interface and one of the current detection pins of the metering chip U6.

As shown in fig. 8, the switching power supply chip UD1 of this example stabilizes 12V to 3.3V, and then supplies operating power to the metering chip U6 system circuit and the carrier communication chip U1 system circuit. In addition, the power module of this example is further provided with a power failure detection unit, which is implemented by a switch transistor Q1, the drain of the switch transistor Q1 is connected to the power failure detection pin of the wideband carrier communication SOC chip U1, the source of the switch transistor Q1 is grounded, and the gate is connected to the power supply, when the power supply fails, the gate is at a low level, the switch transistor Q1 is not turned on, so that the drain of the switch transistor Q1 is changed from a low level to a high level, and the wideband carrier communication SOC chip U1 judges whether the power supply fails or not by the received level signal.

As shown in fig. 5-8, the working principle of the metering module of this example is:

the alternating current commercial power interface J3 is connected with power supplies UA, UB, UC and UN, three paths of differential signals V1_ P, V _ N, V2_ P, V _ N and V3_ P, V _ N are respectively output after being processed by the three paths of voltage sampling circuits, and the three paths of differential signals are input into 55-60 pins of the metering chip U6 to measure voltage. After the current transformer signals (VIA _ P, VIA _ N, VIB _ P, VIB _ N, VIC _ P, VIC _ N) of FIG. 8 are input to the module through the module weak current interface P1, three-way differential signals VIA _ P, VIA _ N and VIB _ P, VIB _ N and VIC _ P, VIC _ N are output to be input to 3-8 pins of the metering chip U6 to measure currents after being processed by the three-way current sampling circuit. And calculating an electric parameter and alternating current sampling functions such as characteristic current signal identification, energy and demand storage and the like by the RN 2026. The UE memory is used as a parameter and data memory of the metering chip U6. After being connected with weak current port communication ports through serial ports of pins 13 and 14 (TX 4 and RX 4) and communication buses of pins 29 and 30 (P13 and P14), the metering chip U6 is communicated with a control part of the intelligent metering switch body, and the metering chip U6 is communicated with serial ports of pins 17 and 29 of the broadband carrier communication SOC chip U1 through serial ports of pins 15 and 16 (TX 5 and RX 5) to exchange commands and data.

The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims (9)

1. A measurement switch module circuit based on a broadband carrier communication controller is characterized in that: the intelligent measuring switch comprises an alternating current carrier interface and a weak current interface which are connected with an intelligent measuring switch main body, and further comprises a power supply module, a carrier communication module, a metering module connected with the carrier communication module, and a characteristic current generating module connected with the output end of the carrier communication module, wherein the input end of the metering module is respectively connected with the alternating current carrier interface and the weak current interface, and the output end of the characteristic current generating module is connected with the alternating current carrier interface.

2. The wideband carrier communication controller based measurement switch module circuit as claimed in claim 1, wherein: the carrier communication module comprises a carrier communication control chip circuit, a carrier communication signal transceiving circuit connected with the carrier communication control chip circuit, and a carrier signal coupling circuit arranged between the carrier communication signal transceiving circuit and the alternating current carrier interface.

3. The wideband carrier communication controller based measurement switch module circuit as claimed in claim 2, wherein: the metering module comprises a metering chip circuit, an alternating voltage sampling circuit and a current sampling circuit, wherein the metering chip circuit is respectively connected with the output ends of the alternating voltage sampling circuit, the weak current interface and the current sampling circuit, and in addition, the metering chip circuit is connected with a signal line of a carrier communication control chip circuit.

4. The wideband carrier communication controller based measurement switch module circuit as claimed in claim 3, wherein: the metering chip circuit comprises a metering chip U6 and a memory UE connected with the metering chip U6, the metering chip U6 adopts an RN2026 metering chip, and an internal CPU can independently realize a metering function and a calibratable high-precision clock function.

5. The wideband carrier communication controller based measurement switch module circuit as claimed in claim 3, wherein: the utility model discloses an exchange carrier wave interface access power four-way signal UA, UB, UC, UN, it is the same that alternating voltage sampling circuit includes three structure, gathers UA, UB, UC voltage's branch road respectively, and the UA branch road includes the resistance that a plurality of concatenated, and the resistance one end of concatenating connects alternating carrier wave interface UA circuit, another termination difference signal conversion unit, difference signal conversion unit includes resistance R28, resistance R30 and electric capacity C42, and wherein, resistance R30 and electric capacity C42 are parallelly connected, and series resistance end and first difference signal output end are connect respectively to one end, and the other end connects second difference signal output end and resistance R47's one end respectively, resistance R47's other end ground connection, measurement chip U6 is equipped with six voltage detection feet, links to each other with six difference signal output ends of three branch road respectively.

6. The wideband carrier communication controller based measurement switch module circuit as claimed in claim 3, wherein: the current sampling circuit comprises three current sampling branches with the same structure, the input end of each current sampling branch is connected with two current transformer differential signals of each phase of a weak electrical interface, the output end outputs the differential signals to two voltage detection pins of the metering chip U6, wherein the first current sampling branch comprises a current acquisition unit with mirror image setting, the current acquisition unit comprises a resistor R29 and a grounding resistor R32 and a grounding capacitor C46 which are respectively arranged at the two ends of the resistor R29, and the two ends of the resistor R29 are respectively connected with one current detection pin of the weak electrical interface and the metering chip U6.

7. The wideband carrier communication controller based measurement switch module circuit of claim 2, wherein: the carrier communication control chip circuit adopts a broadband carrier communication SOC chip SPE7101.

8. The wideband carrier communication controller based measurement switch module circuit as claimed in any one of claims 1-7, wherein: the power module includes:

the power failure detection unit is used for detecting whether the measurement switch module circuit is powered down or not;

an AC to DC unit: the measuring switch module circuit is used for converting alternating current commercial power into 12V power and providing first power supply voltage for the measuring switch module circuit;

a voltage stabilization unit: the voltage regulator is used for converting the 12V power supply into a 3.3V regulated power supply and providing the second power supply voltage for the measurement switch module circuit.

9. The wideband carrier communication controller based measurement switch module circuit as claimed in any one of claims 1-7, wherein: the characteristic current generation module comprises an isolation optocoupler U4, a current switch U5 and an MOS (metal oxide semiconductor) tube Q2, wherein the primary side of the isolation optocoupler U4 is connected with the output end of the carrier communication module, the pin 3 of the secondary side of the isolation optocoupler U5 is connected with the enabling pin 1 of the current switch U5, the secondary side 4 is respectively connected with the source electrode of the MOS tube Q2 and the input pin 3 of the switch current U5, the output pins 5 and 6 of the current switch U5 are connected with the source electrode of the MOS tube Q2 through resistors, the drain electrode of the MOS tube Q2 is connected with an alternating current carrier interface, the grid electrode of the MOS tube Q2 is connected with the drain electrode of the MOS tube Q2 through resistors, and when the equivalent weight measuring switch receives a platform area identification command through the carrier communication module, the carrier communication module controls the characteristic current generation module to generate a characteristic current signal on an alternating current city line.

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