Comprehensive measurement and control unit of intelligent switch cabinet

Abstract

The utility model discloses an intelligent switch cabinet comprehensive measurement and control unit, which belongs to the technical field of switch cabinet measurement and control and comprises a measurement and control main board, a processor, an analog quantity sampling board, a relay output board, a power supply and communication board, a switching value input board and a touch screen connected with the power supply and communication board, and the processor, the analog quantity sampling board, the relay output board, the power supply and communication board and the switching value input board are respectively and electrically connected with the measurement and control main board. The number of the analog quantity sampling boards, the number of the relay output boards and the number of the switching value input boards are at least two. On the basis of the conventional common switch cabinet which takes an electrical instrument and a relay as monitoring and control equipment, the intelligent switch cabinet is matched with novel intelligent instruments (a network electric power instrument, an intelligent power distribution monitoring / protecting module and the like, and a network I / O), and is networked with a computer system of a central control room through a network communication interface of the intelligent switch cabinet; the system is matched with various perfect remote monitoring software to realize'five remote ', and has the characteristics of multiple functions, digitization, networking, intelligentization, remote control, compact structure, easiness in maintenance and the like.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to switchgear measurement and control technical field, specifically is a kind of intelligent switchgear comprehensive measurement and control unit. BACKGROUND

[0002] Traditional switchgear control mode, mainly through circuit breaker, contactor, thermal relay, fuse, control relay, various order relay, mutual inductor and various electrical instrument (ammeter, voltmeter, wattmeter, electric energy meter etc.) combination switch control cabinet to realize on-off, measurement, control, protection etc. Function. This traditional switchgear needs to be equipped with a variety of analog pointer instrument and relay;It brings great inconvenience to production, storage, maintenance, and is mainly operated by artificial, cannot realize computer intelligent management, and it is difficult to realize for more complex control logic. INVENTION CONTENTS

[0003] The utility model technical scheme is to the technical problem that prior art solution is too single, provides the solution significantly different from prior art, mainly provides a kind of intelligent switchgear comprehensive measurement and control unit, to solve the technical problem that traditional switchgear control mode cannot realize multifunction, digitization, intelligentization, network, remote, unattended in the background technique proposed above.

[0004] The utility model solves the technical scheme for the above technical problem:

[0005] A kind of intelligent switchgear comprehensive measurement and control unit, including measurement and control mainboard and with the processor, analog quantity sampling board, relay output board, power and communication board and switch quantity input board that measurement and control mainboard are electrically connected respectively, and with the touch screen that power and communication board are connected;The analog quantity sampling board, relay output board and switch quantity input board are all equipped with at least two.

[0006] Further, the analog quantity sampling board includes analog quantity sampling board I and analog quantity sampling board II, the analog quantity sampling board I is connected with switch cabinet voltage transformer and switch cabinet current transformer;

[0007] And / or, the analog quantity sampling board II is connected with switch cabinet voltage transformer, switch cabinet current transformer and switch cabinet high-voltage live sensor.

[0008] Further, the relay output board includes relay output board I and relay output board II, the relay output board I is connected with switch cabinet heater, switch cabinet fan, switch cabinet indicator light;

[0009] And / or, the relay output board II is connected with switch cabinet indicator light, switch cabinet circuit breaker, switch cabinet electric handcart, switch cabinet electric grounding knife.

[0010] Further, the switch quantity input board includes a switch quantity input board I and a switch quantity input board II, the switch quantity input board I is externally connected with state contact points of circuit breakers, hand carts, grounding knife switches, mechanical interlocks, control switches, operation knobs and the like of the switch cabinet;

[0011] And / or, the switch quantity input board II is externally connected with state contact points of switch cabinet control switches and operation knobs of the switch cabinet.

[0012] Further, the power supply and communication board is externally connected with a central control room computer, a switch cabinet network camera and a wireless temperature measurement antenna, and the wireless temperature measurement antenna is wirelessly connected with a switch cabinet wireless temperature measurement sensor.

[0013] Further, the analog quantity sampling board I is provided with a three-phase multifunctional metering chip for storing electrical parameters of the switch cabinet, and an interface circuit of the three-phase multifunctional metering chip is connected with a plug-in port of the measurement and control mainboard.

[0014] And / or, the analog quantity sampling board II is provided with a current sampling circuit, a Hall effect current sensor chip, a filter circuit, a high-voltage live sampling circuit and a voltage sampling circuit, wherein the Hall effect current sensor chip is used for linearly converting a current signal into a voltage signal.

[0015] Further, the relay output board I is provided with a relay output circuit, a Hall effect current sensor chip and a relay output port connected with a switch cabinet fault indicator light.

[0016] And / or, the relay output board II is provided with a relay output circuit, an electric hand cart control output circuit, an electric grounding knife control output circuit, a Hall effect current sensor chip and a relay output port, a closing relay output port and an opening relay output port.

[0017] Further, the power supply and communication board includes a power supply part and a communication part, the power supply part is provided with an AC220V to DC48V circuit, a DC48V to DC12V circuit and a DC12V to DC5V circuit; the communication part is provided with a remote network port communication circuit, a wireless temperature measurement communication circuit, a network camera communication circuit, a touch screen RS232 serial port communication circuit and a remote RS485 serial port communication circuit.

[0018] Further, the switch quantity input board I is provided with an input quantity input circuit externally connected with state contact points of circuit breakers, hand carts, grounding knife switches, mechanical interlocks, control switches and operation knobs of the switch cabinet.

[0019] And / or, the switch quantity input board II is provided with an input quantity input circuit, a temperature and humidity sensor I circuit and a temperature and humidity sensor II circuit.

[0020] Further, the touch screen is provided with an Ethernet port, a loudspeaker port, an RS232 serial port, and a power supply port.

[0021] Compared with the prior art, the utility model has the advantages of:

[0022] The utility model discloses a processor, measurement and control mainboard, analog quantity sampling board, relay output board, power and communication board, on -off quantity input board and the setting of touch -sensitive screen can realize the real -time monitoring of voltage, current, active power, reactive power, power factor, frequency, electric quantity, harmonic content etc. electric parameter of each power supply and distribution circuit, the real -time monitoring of circuit breaker, handcart (mobile switch cabinet), isolation knife switch (fixed switch cabinet), the on -off state of earthing knife switch, switch cabinet fault alarm information, the control of the on -off of circuit breaker, the shake of handcart (mobile switch cabinet), the on -off of isolation knife switch (fixed switch cabinet), the on -off of earthing knife switch, the operation state of switch equipment is monitored in real time through network camera, and " five remote " is realized with the cooperation of various perfect remote monitoring software, the concept of traditional switch cabinet is changed, has multifunction, digitization, network, intelligent, remote, compact structure, easy maintenance etc. Characteristic, compared with traditional switch cabinet control mode is more advanced and reliable, the utility model has the advantages of preventing / avoiding accident, strengthening enterprise internal energy examination, reducing equipment maintenance and overhaul time, unattended (or few people on duty), realizing data resource sharing, provides solid, reliable foundation for the modernization management of enterprise and institution, greatly improves the reliability and efficiency of power grid operation, improves the quality of electric energy supply.

[0023] The utility model will be explained in detail in combination with the specific embodiment and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structural schematic diagram of intelligent switch cabinet comprehensive measurement and control unit provided by the utility model embodiment is shown in the figure.

[0025] Figure 2 The circuit principle drawing of processor in the utility model is shown in the figure.

[0026] Figure 3 The circuit principle drawing of measurement and control mainboard in the utility model is shown in the figure.

[0027] Figure 4 The circuit principle drawing of analog quantity sampling board I in the utility model is shown in the figure.

[0028] Figure 5 The circuit principle drawing of analog quantity sampling board II in the utility model is shown in the figure.

[0029] Figure 6 The circuit principle drawing of relay output board I in the utility model is shown in the figure.

[0030] Figure 7 The circuit principle diagram of the relay output board II in the utility model;

[0031] Figure 8 is the circuit principle diagram of the power supply and communication board in the utility model;

[0032] Figure 9 The circuit principle diagram of the switch input board I in the utility model;

[0033] Figure 10 The circuit principle diagram of the switch input board II in the utility model;

[0034] Figure 11 The circuit principle diagram of the touch screen in the utility model.

[0035] Reference signs: 1, processor; 2, measurement and control main board; 3, analog quantity sampling board I; 4, analog quantity sampling board II; 5, relay output board I; 6, relay output board II; 7, power supply and communication board; 8, switch input board I; 9, switch input board II; 10, touch screen. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings, and the drawings show several embodiments of the utility model, but the utility model can be realized in different forms and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided in order to make the disclosed content of the utility model more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, and the terms used in the specification of the utility model herein are for the purpose of describing specific embodiments and are not intended to limit the utility model, and the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Embodiment one: please refer to the attached Figure 1 An intelligent switch cabinet comprehensive measurement and control unit, comprising a processor 1 (model number HC32F4A0SITB), an analog quantity sampling board I 3, an analog quantity sampling board II 4, a relay output board I 5, a relay output board II 6, a power supply and communication board 7, a switch input board I 8 and a switch input board II 9 which are electrically connected with a measurement and control main board 2 respectively, and the power supply and communication board 7 is connected with a 1280*800 industrial grade touch screen 10.

[0039] Please refer to the attached Figure 1The analog quantity sampling board I 3 is connected with the switch cabinet voltage transformer and the switch cabinet current transformer at the same time; the analog quantity sampling board II 4 is connected with the switch cabinet voltage transformer, the switch cabinet current transformer and the switch cabinet high-voltage live sensor at the same time.

[0040] Please refer to the attached drawings Figure 1 The relay output board I 5 is connected with the switch cabinet heater, the switch cabinet fan and the switch cabinet indicator at the same time; the relay output board II 6 is connected with the switch cabinet indicator, the switch cabinet circuit breaker, the switch cabinet electric handcart (or electric knife switch) and the switch cabinet electric grounding knife at the same time.

[0041] Please refer to the attached drawings Figure 1 The power supply and communication board 7 is connected with the central control room computer, the switch cabinet network camera and the wireless temperature measuring antenna at the same time, and the wireless temperature measuring antenna is wirelessly connected with the switch cabinet wireless temperature measuring sensor.

[0042] Please refer to the attached drawings Figure 1 The switch quantity input board I 8 is connected with the state contact points of the switch cabinet circuit breaker, the handcart (or knife switch), the grounding knife switch, the mechanical interlocking, the control switch and the operation knob at the same time; the switch quantity input board II 9 is connected with the state contact points of the switch cabinet temperature and humidity sensor and the switch cabinet control switch and the operation knob at the same time.

[0043] The power supply and communication board 7 and the switch cabinet network camera adopt Ethernet communication.

[0044] The power supply and communication board 7 and the central control room computer adopt Ethernet communication.

[0045] The power supply and communication board 7 and the 1280*800 industrial touch screen 10 adopt Ethernet communication for video signal transmission.

[0046] Specifically,

[0047] As shown in Figure 2 The connection circuit of the processor 1 comprises:

[0048] The I2C bus port of the storage chip of the processor 1 is connected with the storage chip driving circuit of the measurement and control mainboard 2, so as to realize data reading and storage of the storage chip by the processor 1.

[0049] The three-phase multifunctional metering chip communication port of the processor 1 is connected with the plug-in port A of the measurement and control mainboard 2, the plug-in port A of the measurement and control mainboard 2 is connected with the three-phase multifunctional metering chip driving circuit of the analog quantity sampling board I 3, so as to realize real-time reading of various electric parameters such as voltage, current, active power, reactive power, power factor, frequency, electric quantity and harmonic content of the three-phase multifunctional metering chip.

[0050] The analog input port of the processor 1 is connected with the connector port B of the measurement and control mainboard 2, the connector port B of the measurement and control mainboard 2 is connected with the analog quantity sampling and operational amplifier circuit of the analog quantity sampling board II 4, and the signal collection of the voltage of the energy storage motor, the current of the energy storage motor, the voltage of the opening coil, the current of the opening coil, the voltage of the closing coil, the current of the closing coil, the A-phase, B-phase and C-phase of the high-voltage live sensor is realized;

[0051] The switch input port of the processor 1 is connected with the connector port F and the connector port G of the measurement and control mainboard 2, the connector port F of the measurement and control mainboard 2 is connected with the switch input board I 8, and the connector port G of the measurement and control mainboard 2 is connected with the switch input board II 9, so that the state collection of the circuit breaker, the handcart (or the knife switch), the grounding knife switch, the mechanical interlocking, the control switch and the operation knob of the switch cabinet by the processor 1 is realized.

[0052] The relay output port of the processor 1 is connected with the connector port C and the connector port D of the measurement and control mainboard 2, the connector port C of the measurement and control mainboard 2 is connected with the relay output board I 5, the heater and the fan start-stop of the switch cabinet are controlled to improve the environment in the cabinet, the connector port D of the measurement and control mainboard 2 is connected with the relay output board II 6, various operations such as the opening and closing of the circuit breaker of the switch cabinet, the electric handcart shaking in and out (the electric knife switch opening and closing), the electric grounding knife opening and closing, the single-step operation, the one-key power-on and the one-key power-off are realized, and the indication output of the current alarm, fault and state of the switch cabinet is realized.

[0053] The wireless temperature measurement communication port of the processor 1 is connected with the connector port E of the measurement and control mainboard 2, the connector port E of the measurement and control mainboard 2 is connected with the wireless temperature measurement receiving circuit, and the temperature collection of each electrical node and cable joint in the switch cabinet is realized through the external wireless temperature measurement antenna.

[0054] The temperature and humidity sensor signal input port of the processor 1 is connected with the connector port G of the measurement and control mainboard 2, and the temperature and humidity signal collection of the environment in the switch cabinet is realized.

[0055] The RS232A communication port of the processor 1 is connected with the connector port E of the measurement and control mainboard 2, the connector port E of the measurement and control mainboard 2 is connected with the RS232 communication driving circuit of the power supply and communication board 7, the driving circuit is connected with the 1280*800 industrial touch screen 10, the data communication between the processor 1 and the touch screen 10 is realized.

[0056] The remote RS485 communication port I, the remote RS485 communication port II and the remote Ethernet communication port of the processor 1 are connected with the connector port E of the measurement and control mainboard 2, the connector port E of the measurement and control mainboard 2 is connected with the power supply and communication board 7, the RS485 driving circuit and the Ethernet driving circuit are connected with the central control room computer, the "five remote" function is realized by cooperating with the remote monitoring software, and the networking, remote and unmanned are realized.

[0057] As Figure 3 shown in the figure, the connection circuit of the measurement and control mainboard 2 includes:

[0058] The DC 1.65V power supply circuit of the measurement and control mainboard 2 provides DC 1.65V power supply for the whole circuit, and provides zero voltage for the analog quantity sampling circuit, so as to realize full-wave sampling of the analog quantity sampling; the DC 3.3V power supply circuit of the measurement and control mainboard 2 provides DC 3.3V power supply for the processor 1 and the whole circuit;

[0059] The programming port circuit of the measurement and control mainboard 2 is connected with the J-LINK online debugger and programmer, so as to realize software programming of the processor 1 (HC32F4A0SITB);

[0060] The storage chip circuit of the measurement and control mainboard 2 is connected with the I2C bus port of the storage chip of the processor 1, so as to realize reading and storage of the system parameters, protection parameters, adjustment and calibration parameters, alarm events and fault events stored by the processor 1;

[0061] The plug-in port A of the measurement and control mainboard 2 is used to connect the analog quantity sampling board I 3; the plug-in port B of the measurement and control mainboard 2 is used to connect the analog quantity sampling board II 4; the plug-in port C of the measurement and control mainboard 2 is used to connect the relay output board I 5; the plug-in port D of the measurement and control mainboard 2 is used to connect the relay output board II 6; the plug-in port E of the measurement and control mainboard 2 is used to connect the power supply and communication board 7; the plug-in port F of the measurement and control mainboard 2 is used to connect the on-off quantity input board I 8; and the plug-in port G of the measurement and control mainboard 2 is used to connect the on-off quantity input board II 9. The processor 1 is connected with various boards through the measurement and control mainboard 2.

[0062] As Figure 4 shown in the figure, the connection circuit of the analog quantity sampling board I 3 includes:

[0063] The current transformer input end of the analog quantity sampling board I 3 is externally connected with the output end of the switch cabinet current transformer; the voltage transformer of the analog quantity sampling board I 3 is externally connected with the output end of the switch cabinet voltage transformer; after sampling and filtering, the voltage and current are sent to the three-phase multifunctional metering chip; the processor 1 is connected with the three-phase multifunctional metering chip interface circuit through the plug-in port of the measurement and control mainboard 2, so as to realize real-time reading of various electric parameters such as voltage, current, active power, reactive power, power factor, frequency, electric quantity, harmonic content of the three-phase multifunctional metering chip;

[0064] After the zero sequence voltage and standby voltage are processed by the sampling, filtering and operational amplifier circuit, they are directly sent to the analog quantity sampling port of the processor 1; after A / D conversion, sampling and calculation of the processor 1, the real-time values of the zero sequence voltage and standby voltage are obtained;

[0065] The DC 3.3V power supply circuit and the DC 1.65V power supply circuit of the analog quantity sampling board I 3 are used to supply power for the circuit of the analog quantity sampling board I 3.

[0066] As Figure 5 shown, the connection circuit of the analog quantity sampling board II 4 includes:

[0067] The input end of the energy storage motor current sampling circuit of the analog quantity sampling board II 4 is connected with the energy storage motor current loop of the switch cabinet, and after conversion by the Hall effect current sensor chip, the 0-5A current signal is linearly converted into a 0-3.3V voltage signal, which is filtered and then connected to the measurement and control mainboard 2 through the connector port B, and then connected to the analog quantity acquisition port of the processor 1 through the measurement and control mainboard 2. After A / D conversion, sampling and calculation by the processor 1, the real-time value of the energy storage motor current is obtained; the circuit principles of the closing coil current and the opening coil current are the same as those of the energy storage motor current.

[0068] The input end of the high-voltage live sampling circuit of the analog quantity sampling board II 4 is connected with the output end of the high-voltage live sensor of the switch cabinet, and after voltage transformation, filtering and operational amplification, it is connected to the measurement and control mainboard 2 through the connector port B, and then connected to the analog quantity acquisition port of the processor 1 through the measurement and control mainboard 2. After A / D conversion, sampling and calculation by the processor 1, the real-time value of the output voltage of the high-voltage live sensor is obtained.

[0069] The input end of the energy storage motor voltage sampling circuit of the analog quantity sampling board II 4 is connected with the output end of the energy storage motor voltage of the switch cabinet, and after sampling, filtering and operational amplification, it is connected to the measurement and control mainboard 2 through the connector port B, and then connected to the analog quantity acquisition port of the processor 1 through the measurement and control mainboard 2. After A / D conversion, sampling and calculation by the processor 1, the real-time value of the energy storage motor voltage of the switch cabinet is obtained; the circuit principles of the opening coil voltage, the closing coil voltage and the motor voltage are the same as those of the energy storage motor voltage.

[0070] As Figure 6 shown, the connection circuit of the relay output board I 5 includes:

[0071] The output end of the relay output circuit of the relay output board I 5 is connected with the heater A, the heater B and the fan A of the switch cabinet, and the input end of the relay output circuit is connected with the connector port C of the measurement and control mainboard 2, and then connected with the relay output port of the processor 1 through the measurement and control mainboard 2, so that the processor 1 can control the start and stop of the heater A, the heater B and the fan A of the switch cabinet. The processor 1 controls the temperature and humidity of the cabinet according to the collected data of the temperature and humidity of the switch cabinet and the set values of the temperature and humidity;

[0072] The relay output port of the relay output board I 5 is also connected with the switch cabinet fault indicating lamp. When the processor 1 judges that there is high voltage live wire, ground knife fault, handcart fault, circuit breaker fault, heater A fault, heater B fault, fan A fault, the output end of the relay output circuit of the relay output board I 5 is driven to close action, the corresponding indicating lamp of the switch cabinet is driven to light, the corresponding fault is indicated, the fault diagnosis and indication of the switch cabinet element are realized; the Hall effect current sensor chip connected with the relay output circuit of the heater A, the heater B and the fan A converts the large current signal into a weak voltage signal, and can also collect the working current of the heater A, the heater B and the fan A in real time, and then connects with the connector port C of the measurement and control mainboard 2, and then connects with the analog quantity collection port of the processor 1 through the measurement and control mainboard 2, so that the processor 1 can acquire the working current of the heater A, the heater B and the fan A in real time.

[0073] As shown in Figure 7 , the connection circuit of the relay output board II 6 comprises:

[0074] The output end of the relay output circuit of the relay output board II 6 is connected with the fan B and the fan C of the switch cabinet, the input end of the relay output circuit is connected with the connector port D of the measurement and control mainboard 2 through the connector port D, and then is connected with the relay output port of the processor 1 through the measurement and control mainboard 2, so that the processor 1 can realize the start-stop control of the fan B and the fan C of the switch cabinet, and the processor 1 can control the temperature and humidity of the cabinet environment of the switch cabinet according to the collected data of the temperature and humidity of the switch cabinet and the set values of the temperature and humidity;

[0075] The relay output port of the relay output board II 6 is also connected with the total alarm, the total fault and the fan B fault indicating lamp of the switch cabinet. When the processor 1 judges that there is total alarm, total fault and fan B fault, the output end of the relay output circuit of the relay output board II 6 is driven to close action, the corresponding indicating lamp of the switch cabinet is driven to light, the corresponding fault is indicated, and the alarm diagnosis, fault diagnosis and indication of the switch cabinet element are realized;

[0076] The closing and opening relay output ports of the relay output board II 6 are connected with the closing and opening control circuit of the circuit breaker of the switch cabinet, so that the closing and opening control of the circuit breaker of the switch cabinet can be realized;

[0077] The electric handcart (electric knife switch) and the electric ground knife control output circuit of the relay output board II 6 are connected with the direct current motor of the electric handcart (or the electric knife switch) and the electric ground knife of the switch cabinet, so that the control of the rocking in (closing) and the rocking out (opening) of the electric handcart (electric knife switch) and the electric ground knife of the switch cabinet can be realized;

[0078] The relay output circuit control input end of the relay output board II 6 is connected with the connection port D of the measurement and control main board 2 through the connection port D, and then connected with the relay output port of the processor 1 through the measurement and control main board 2, so that the processor can control the circuit breaker, the electric handcart (electric knife switch) and the electric grounding knife according to various complex logical operation instructions such as remote control instructions, on-site operation instructions, single-step operation instructions, one-key power-on instructions and one-key power-off instructions to realize various operations of the circuit breaker, the electric handcart (electric knife switch) and the electric grounding knife. The Hall effect current sensor chip connected with the fan B, the handcart motor (knife switch motor) and the grounding knife motor relay output circuit converts the large current signal into a weak voltage signal, and can also collect the working current of the fan B, the handcart motor (knife switch motor) and the grounding knife motor in real time, and then connected with the analog quantity collection port of the processor 1 through the connection port D of the measurement and control main board 2 and the connection port D of the measurement and control main board 2, so that the processor 1 can obtain the working current of the fan B, the handcart motor (knife switch motor) and the grounding knife motor in real time.

[0079] As shown in FIGS. 8(a) and 8(b), the connection circuit of the power supply and communication board 7 includes:

[0080] The AC220V to DC48V circuit of the power supply and communication board 7 converts the external AC220V power supply into a DC48V power supply; the DC48V to DC12V circuit converts the DC48V power supply into a DC12V power supply; the DC12V to DC5V circuit converts the DC12V power supply into a DC5V power supply, and finally connected with the connection port E of the measurement and control main board 2 through the connection port E, connected with the processor 1 through the measurement and control main board 2, and connected with other boards through the connection port of the measurement and control main board 2, so as to realize the power supply of all circuits with DC48V, DC12V and DC5V; and the DC12V output terminal is connected with the power input terminal of the 1280*800 industrial-grade touch screen 10, so as to realize the power supply of the 1280*800 industrial-grade touch screen 10.

[0081] The remote network port communication circuit output end of the power supply and communication board 7 is connected with the central control room computer through the RJ45 network port and the super five categories of Ethernet cable, and the remote network port communication circuit input end is connected with the connection port E of the measurement and control main board 2 through the connection port E, and then connected with the processor 1 through the measurement and control main board, so as to realize the communication connection between the processor 1 and the central control room computer, realize the "five remote" function by cooperating with the remote monitoring software, and realize the intelligentization, networking, remotization and unmanned of the switch cabinet.

[0082] The wireless temperature measurement communication circuit of the power supply and communication board 7 can realize communication with the wireless temperature measurement sensor through the external wireless temperature measurement antenna, and can obtain the temperature signal sent by the wireless temperature measurement sensor in real time, so as to obtain the temperature values of each electrical node and cable joint in the switch cabinet in real time; the input end of the wireless temperature measurement communication circuit is connected with the connector port E of the measurement and control mainboard 2 through the connector port E, and then is connected with the processor 1 through the measurement and control mainboard 2, so that the processor 1 can obtain the temperature values of each electrical node and cable joint in the switch cabinet in real time; when the processor 1 judges that the temperature exceeds the alarm setting value or the fault setting value, the alarm or fault information is sent, and the event is recorded;

[0083] The network camera communication circuit of the power supply and communication board 7 is connected with the network camera installed in the switch cabinet through the POE power supply Ethernet port of the five-port industrial switch and the super five-port Ethernet cable, so as to realize power supply and data communication of the network camera, and is connected with the computer in the central control room through the POE power supply Ethernet port of the five-port industrial switch and the super five-port Ethernet cable, so as to send the video signal of the network camera in the switch cabinet to the computer in the central control room, and realize real-time monitoring of the running state of the switch equipment in the switch cabinet by cooperating with the remote monitoring software;

[0084] The output end of the touch screen RS232 serial port communication circuit of the power supply and communication board 7 is connected with the RS232 communication port of the 1280*800 industrial touch screen 10 through the RS232 serial port communication cable, the input end of the touch screen RS232 serial port communication circuit is connected with the connector port E of the measurement and control mainboard 2 through the connector port E, and is connected with the touch screen communication port of the processor 1 through the measurement and control mainboard 2, so as to realize data communication between the processor 1 and the 1280*800 industrial touch screen 10, and realize full Chinese friendly man-machine interface through the 1280*800 industrial touch screen 10, display and indication of each electrical parameter, temperature, humidity, state quantity and event of the switch cabinet, and completion of various operations such as switching on and off of the circuit breaker of the switch cabinet, electric handcart shaking in and out (electric knife switch opening and closing), electric grounding knife opening and closing, single-step operation, one-key power-on and one-key power-off, etc.

[0085] The remote RS485 serial port I communication circuit and the remote RS485 serial port II communication circuit of the power supply and communication board 7 are used as a backup mode for communication with the computer in the central control room, so as to realize diversification of the communication mode with the computer in the central control room and adapt to various application occasions.

[0086] As shown in Figure 9 The connection circuit of the switch quantity input board I 8 includes:

[0087] The input end of the input circuit of the switch quantity input board I 8 is externally connected with the state contact points of the circuit breaker, trolley (or knife switch), grounding knife switch, mechanical interlock, control switch, operating knob, etc. After filtering and photoelectric isolation, the output end of the input circuit is connected with the connector port F of the measurement and control main board 2 through the connector port F of the measurement and control main board 2, and is connected with the switch quantity input port of the processor 1 through the measurement and control main board 2, so that the processor 1 can collect the states of the circuit breaker, trolley (or knife switch), grounding knife switch, mechanical interlock, control switch, operating knob, etc.

[0088] As shown in Figure 10 , the connection circuit of the switch quantity input board II 9 comprises:

[0089] The input end of the input circuit of the switch quantity input board II 9 is externally connected with the state contact points of the circuit breaker, trolley (or knife switch), grounding knife switch, mechanical interlock, control switch, operating knob, etc. After filtering and photoelectric isolation, the output end of the input circuit is connected with the connector port G of the measurement and control main board 2 through the connector port G of the measurement and control main board 2, and is connected with the switch quantity input port of the processor 1 through the measurement and control main board 2, so that the processor 1 can collect the states of the circuit breaker, trolley (or knife switch), grounding knife switch, mechanical interlock, control switch, operating knob, etc.

[0090] The temperature and humidity sensor I circuit and the temperature and humidity sensor II circuit of the switch quantity input board II 9 are connected with the externally connected temperature and humidity sensor I and temperature and humidity sensor II through terminals. The output ends of the temperature and humidity sensor I circuit and the temperature and humidity sensor II circuit are connected with the connector port G through current limiting resistors and pull-up resistors. The connector port G is connected with the connector port G of the measurement and control main board 2, and is connected with the temperature and humidity sensor signal input port of the processor 1 through the measurement and control main board 2, so that the processor 1 can collect the temperature and humidity values measured by the temperature and humidity sensor I and the temperature and humidity sensor II.

[0091] As shown in Figure 11 , the connection circuit of the 1280*800 industrial grade touch screen 10 comprises:

[0092] The Ethernet port of the 1280*800 industrial grade touch screen 10 is connected with the Ethernet port of the five-port industrial grade switch module of the power supply and communication board 7 through a super five category network cable, and then is connected with the circuit breaker network camera through the POE power supply Ethernet port of the five-port industrial grade switch module through a super five category network cable, so that the video images of the circuit breaker, trolley (or knife switch), grounding knife, etc. can be displayed on the touch screen in real time.

[0093] The RS232 serial port of the 1280*800 industrial grade touch screen 10 is connected with the touch screen RS232 serial port communication circuit output port of the power supply and communication board 7, the input end of the touch screen RS232 serial port communication circuit is connected with the connector port E of the measurement and control mainboard 2 through the connector port E, and is connected with the touch screen communication port of the processor 1 through the measurement and control mainboard 2, so that the data communication between the processor 1 and the 1280*800 industrial grade touch screen 10 is realized, the full Chinese friendly man-machine interface is realized through the 1280*800 industrial grade touch screen 10, the display and indication of various electrical parameters, temperature, humidity, state quantity and event record of the switch cabinet are realized, and various operations such as the switching of the circuit breaker of the switch cabinet, the rocking in and out of the electric trolley (the switching of the electric knife switch), the switching of the electric grounding knife, the single-step operation, the one-key power-on and the one-key power-off are completed.

[0094] The power supply port of the 1280*800 industrial grade touch screen 10 is connected with the DC12V output port of the power supply and communication board 7, so that the power supply and communication board 7 realizes the power supply for the 1280*800 industrial grade touch screen 10.

[0095] In the embodiment, the difference from the first embodiment is that:

[0096] The 1280*800 industrial grade touch screen 10 also has a voice output function, as shown in the figure, the loudspeaker port of the 1280*800 industrial grade touch screen 10 can be externally connected with two 18W 4Ω loudspeakers, so as to realize the voice broadcast function. Figure 11

[0097] The other parts are the same as those in the first embodiment.

[0098] In summary, the switch cabinet can acquire the voltage signal of the voltage transformer, the current signal of the current transformer and the voltage signal of the high-voltage charged sensor through the analog quantity sampling board I 3 and the analog quantity sampling board II 4, can control the start and stop of the heater, the start and stop of the fan and the bright and dark of the indicator light of the switch cabinet through the relay output board I 5, can control the switching of the circuit breaker, the rocking in and out of the electric trolley (or the switching of the electric knife switch), the switching of the electric grounding knife, the bright and dark of the indicator light of the switch cabinet through the relay output board II 6, can acquire the state of the circuit breaker, the trolley (or the knife switch), the grounding knife, the mechanical interlocking, the control switch and the operation knob of the switch cabinet through the on-off quantity input board I 8, can acquire the state of the control switch and the operation knob of the switch cabinet and the temperature and humidity signals of the temperature and humidity sensor of the switch cabinet through the on-input quantity input board II 9, can acquire the temperature signal of the wireless temperature sensor through the connection of the power supply and communication board 7 and the wireless temperature antenna, can acquire the video signal of the switch and the knife switch in the switch cabinet through the connection with the network camera of the switch cabinet, and can realize the "five remote" function, the networking, the remote and the unmanned through the connection with the computer in the central control room and the cooperation with the remote monitoring software.

[0099] ​1) Telemetry: Real-time computer voltage, current, active power, reactive power, power factor, frequency, etc. continuously collected, analyzed, processed, recorded, displayed curves, bar charts, automatically generated reports.

[0100] 2) Remote signaling: Real-time switch operating state, protection action, etc. switch quantity monitoring, real-time computer display and automatic alarm, and real-time recording and printing of switch state, accident tripping, overcurrent, quick break, temperature, etc. in each cabinet.

[0101] 3) Remote control: Select the corresponding station number, switch number, handcart number, knife switch number, closing / opening, etc. information through the computer screen, and the state of the switch, handcart, and knife switch to be selected is fed back to the screen for confirmation before execution. Real-time recording of operation time, type, and switch number, etc.

[0102] 4) Remote adjustment: Used to set the operating parameters of various intelligent modules. The computer sets the alarm and fault protection values of the intelligent modules remotely according to the screen operation instructions or the analysis and judgment results of the system.

[0103] 5) Remote vision: Mainly used for image transmission of cabinet breakers, handcarts (isolating knife switches), and grounding knife switches. Real-time monitoring of switchgear operation state through network cameras.

[0104] Then, the processor 1 processes and calculates the collected switch cabinet voltage and current signals to calculate the required voltage, current, active power, reactive power, power factor, frequency, electric quantity, harmonic content, and other electrical parameters, achieving analog quantity multifunction and digitization. The collected switch cabinet temperature and humidity signals are processed and calculated to control the start and stop of the switch cabinet heater and fan to improve the cabinet environment. The collected wireless temperature measurement signals are processed and calculated to calculate the temperature of each electrical node and cable joint in the switch cabinet. According to the set system parameters and protection settings, control, alarm, fault judgment, and indication are performed, and remote transmission is performed. Through judgment, analysis, and processing of the switch cabinet breaker state, handcart (or knife switch) state, grounding knife switch state, mechanical interlocking state, control switch, and operation knob state, more complex control logic operations are realized, achieving intelligentization.

[0105] Finally, a 1280*800 industrial-grade touch screen 10 is used to realize a full-Chinese friendly human-machine interface, displaying and indicating switch cabinet electrical parameters, temperature, humidity, state quantities, events, etc. Switch cabinet breaker closing and opening, electric handcart in and out (electric knife switch closing and opening), electric grounding knife switch closing and opening, single-step operation, one-key power-on, one-key power-off, and other operations can be completed, realizing the upgrade and replacement of traditional switch cabinets to intelligent switch cabinets.

[0106] The utility model has carried out the exemplary description to the utility model in the above-mentioned combination drawing, obviously the utility model concrete realization is not limited by above-mentioned mode, only if the method conception and technical scheme of the utility model have been used to carry out this kind of non-essential improvement, or the conception and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. An intelligent switch cabinet integrated measurement and control unit, characterized in that: It comprises a measurement and control mainboard (2) and a processor (1), an analog quantity sampling board, a relay output board, a power supply and communication board (7) and a switching quantity input board which are electrically connected with the measurement and control mainboard (2) respectively, and a touch screen (10) connected with the power supply and communication board (7); the analog quantity sampling board, the relay output board and the switching quantity input board are each provided with at least two. 2.The intelligent switch cabinet integrated measurement and control unit according to claim 1, characterized in that: The analog quantity sampling board comprises an analog quantity sampling board I (3) and an analog quantity sampling board II (4), the analog quantity sampling board I (3) is externally connected with a switch cabinet voltage transformer and a switch cabinet current transformer; And / or, the analog quantity sampling board II (4) is externally connected with a switch cabinet voltage transformer, a switch cabinet current transformer and a switch cabinet high-voltage live sensor. 3.The intelligent switch cabinet integrated measurement and control unit according to claim 1, characterized in that: The relay output board comprises a relay output board I (5) and a relay output board II (6), the relay output board I (5) is externally connected with a switch cabinet heater, a switch cabinet fan and a switch cabinet indicator light; And / or, the relay output board II (6) is externally connected with a switch cabinet indicator light, a switch cabinet circuit breaker, a switch cabinet electric handcart and a switch cabinet electric grounding knife.

4. The intelligent switch cabinet integrated measurement and control unit of claim 1, wherein: The switching quantity input board comprises a switching quantity input board I (8) and a switching quantity input board II (9), the switching quantity input board I (8) is externally connected with a switch cabinet circuit breaker, a handcart, a grounding knife, a mechanical interlock, a control switch and a state contact of an operating knob; And / or, the switching quantity input board II (9) is externally connected with a switch cabinet temperature and humidity sensor and a state contact of a switch cabinet control switch and an operating knob.

5. The intelligent switchgear integrated measurement and control unit according to claim 1, characterized in that: The power supply and communication board (7) is externally connected with a central control room computer, a switch cabinet network camera and a wireless temperature measurement antenna, and the wireless temperature measurement antenna is wirelessly connected with a switch cabinet wireless temperature measurement sensor.

6. The intelligent switchgear integrated measurement and control unit according to claim 2, characterized in that: The analog quantity sampling board I (3) is provided with a three-phase multifunctional metering chip for storing switch cabinet electric parameters, and an interface circuit of the three-phase multifunctional metering chip is connected with a plug-in port of the measurement and control mainboard (2); And / or, the analog quantity sampling board II (4) is provided with a current sampling circuit, a Hall effect current sensor chip, a filter circuit, a high-voltage live sampling circuit and a voltage sampling circuit, wherein the Hall effect current sensor chip is used for linearly converting a current signal into a voltage signal.

7. The intelligent switchgear integrated measurement and control unit of claim 3, wherein: The relay output board I (5) is provided with a relay output circuit, a Hall effect current sensor chip and a relay output port connected with a switch cabinet fault indicator light; And / or, the relay output board II (6) is provided with a relay output circuit, an electric handcart control output circuit, an electric grounding knife control output circuit, a Hall effect current sensor chip, a relay output port, a closing relay output port and an opening relay output port. 8.The intelligent switch cabinet integrated measurement and control unit of claim 1, wherein: The power supply and communication board (7) comprises a power supply part and a communication part, the power supply part is provided with an AC220V to DC48V circuit, a DC48V to DC12V circuit and a DC12V to DC5V circuit; the communication part is provided with a remote transmission network port communication circuit, a wireless temperature measurement communication circuit, a network camera communication circuit, a touch screen RS232 serial port communication circuit and a remote RS485 serial port communication circuit.

9. The integrated measuring and control unit of the intelligent switchgear cabinet according to claim 4, characterized in that: The switch quantity input board I (8) is provided with an input circuit of the state contact of the external switch cabinet circuit breaker, handcart, grounding knife switch, mechanical interlock, control switch and operation knob. And / or, the switch quantity input board II (9) is provided with an input circuit, a temperature and humidity sensor I circuit and a temperature and humidity sensor II circuit.

10. The integrated measuring and control unit of the intelligent switchgear cabinet according to claim 1, characterized in that: The touch screen (10) is provided with an Ethernet port, a loudspeaker port, an RS232 serial port and a power supply port.

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