CN215576198U - Alternating current system switch measurement and control device and alternating current system - Google Patents
Alternating current system switch measurement and control device and alternating current system Download PDFInfo
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- CN215576198U CN215576198U CN202121539403.5U CN202121539403U CN215576198U CN 215576198 U CN215576198 U CN 215576198U CN 202121539403 U CN202121539403 U CN 202121539403U CN 215576198 U CN215576198 U CN 215576198U
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Abstract
The utility model relates to an alternating current system switch measurement and control device and an alternating current system, comprising: the detection interface circuit receives the access signal, processes the access signal and outputs a detection signal; the control interface circuit receives and processes the control signal and outputs the control signal; the sampling unit is used for receiving an input signal, detecting the input signal and outputting a sampling signal; and the controller is connected with the detection interface circuit, the control interface circuit and the sampling unit, receives the detection signal and the sampling signal, and outputs a control signal to the control interface circuit according to the detection signal and the sampling signal. The utility model can prevent the abnormal power failure of the alternating current system, improve the use safety and reliability and ensure the normal work of the load equipment.
Description
Technical Field
The utility model relates to the field of switch control of an alternating current system, in particular to a switch measurement and control device of the alternating current system and the alternating current system.
Background
In industries such as electric power and communication, an alternating current system and a direct current system need to be configured according to the power supply requirement of secondary equipment, so that the normal operation of the secondary equipment is guaranteed. The low-voltage AC screen has the following functions: the extension of the power supply for the electric equipment is effectively controlled and monitored in a centralized way. Corresponding to a small-capacity power supply system, such as a distributed power supply system, usually an integrated and independent power supply system is formed by alternating current power distribution, direct current power distribution, rectification, monitoring and the like, and is integrally installed in a cabinet. A relatively large-capacity power supply system generally has an ac distribution panel separately installed to meet the power supply needs of various loads.
In an alternating current system, the system is divided into a dual power supply system, a two-incoming-line one-line connected system, a four-incoming-line one-line connected system and the like according to the configuration form of the system; the system is provided with a plurality of power input interfaces, and proper incoming lines are selected to supply power to the alternating current bus by switching of a switch; in the system application, the multi-path incoming line cannot supply power to one section of bus simultaneously, and the condition of bus power failure cannot occur, so that the load equipment loses power, and therefore, a switch control device capable of meeting the requirements needs to be arranged.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide an ac system switch measurement and control device and an ac system, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a switch measurement and control device of an alternating current system is constructed, and the device comprises:
the detection interface circuit receives an access signal, processes the access signal and outputs a detection signal;
the control interface circuit receives and processes the control signal and outputs the control signal;
the sampling unit is used for receiving an input signal, detecting the input signal and outputting a sampling signal;
and the controller is connected with the detection interface circuit, the control interface circuit and the sampling unit, receives the detection signal and the sampling signal, and outputs the control signal to the control interface circuit according to the detection signal and the sampling signal.
Wherein the detection interface circuit comprises: the circuit comprises a first resistor, a first voltage regulator tube, a first capacitor, a second resistor, a photoelectric coupler and a third resistor;
the first end of the first resistor is connected with the detection interface, the second end of the first resistor is connected with the cathode of the first voltage-regulator tube, the first end of the first capacitor and the first end of the second resistor, and the anode of the first voltage-regulator tube and the second end of the first capacitor are grounded; the second end of the second resistor is connected with the first end of the photoelectric coupler, the second end of the photoelectric coupler is grounded, the third end of the photoelectric coupler is connected with the controller, and the fourth end of the photoelectric coupler is grounded; and the first end of the third resistor is connected with a high level, and the second end of the third resistor is connected with the third end of the photoelectric coupler.
Wherein the control interface circuit comprises: the fourth resistor, the fifth resistor, the first triode, the second voltage-regulator tube and the relay;
the first end of the fourth resistor is connected with the controller, the second end of the fourth resistor is connected with the first end of the fifth resistor and the base electrode of the first triode, the second end of the fifth resistor and the source electrode of the first triode are connected with power supply voltage, the collector electrode of the first triode is connected with the first end of the coil of the relay and the cathode of the second voltage regulator tube, the anode of the second voltage regulator tube and the second end of the coil of the relay are grounded, and the input contact of the relay is controlled by the switch.
Wherein the sampling unit includes: a voltage sampling circuit and a current sampling circuit;
the voltage sampling circuit is used for detecting voltage and outputting a voltage sampling signal to the controller;
the current sampling circuit is used for detecting current and outputting a current sampling signal to the controller.
The voltage sampling circuit is an alternating current three-phase voltage sampling circuit.
Wherein the voltage sampling circuit comprises: the first resistor, the second resistor, the third resistor, the fourth resistor, the sixth resistor, the first voltage transformer, the seventh resistor, the eighth resistor, the ninth resistor, the tenth resistor, the second capacitor and the third capacitor;
a first end of the sixth resistor is connected with a live wire, a second end of the sixth resistor is connected with a first end of the first voltage transformer, a second end of the first voltage transformer is connected with a zero line, a third end of the first voltage transformer is connected with a first end of the seventh resistor and a first end of the ninth resistor, a second end of the seventh resistor and a second end of the eighth resistor are grounded, and a first end of the eighth resistor and a first end of the tenth resistor are connected with a fourth end of the first voltage transformer; a second end of the ninth resistor is connected with a first end of the third capacitor and the controller; the second end of the third capacitor and the second end of the second capacitor are grounded, and the second end of the tenth resistor is connected with the first end of the second capacitor and the controller.
Wherein the current sampling circuit comprises: the circuit comprises a first current transformer, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor and a fifth capacitor;
the first end of the first current transformer is connected with the first end of the eleventh resistor and the first end of the thirteenth resistor; a second end of the eleventh resistor and a second end of the twelfth resistor are grounded, and a first end of the twelfth resistor and a first end of the fourteenth resistor are connected with a second end of the first current transformer; a second end of the thirteenth resistor is connected with a first end of the fourth capacitor and the controller, and a second end of the fourth capacitor and a second end of the fifth capacitor are grounded; a second end of the fourteenth resistor is connected to the first end of the fifth capacitor and to the controller.
Wherein, still include: and the communication interface is connected with the controller and is used for the controller to communicate with external equipment.
Wherein, still include: and the configuration interface is connected with the controller and used for the controller to carry out address configuration.
The utility model also provides an alternating current system which comprises at least more than one alternating current system switch measurement and control device.
The alternating current system switch measurement and control device and the alternating current system have the following beneficial effects: the method comprises the following steps: the detection interface circuit receives the access signal, processes the access signal and outputs a detection signal; the control interface circuit receives and processes the control signal and outputs the control signal; the sampling unit is used for receiving an input signal, detecting the input signal and outputting a sampling signal; and the controller is connected with the detection interface circuit, the control interface circuit and the sampling unit, receives the detection signal and the sampling signal, and outputs a control signal to the control interface circuit according to the detection signal and the sampling signal. The utility model can prevent the abnormal power failure of the alternating current system, improve the use safety and reliability and ensure the normal work of the load equipment.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic block diagram of an ac system switch measurement and control device provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a switching measurement and control device of an ac system according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of the detection interface circuit of the present invention;
FIG. 4 is a circuit diagram of the control interface circuit of the present invention;
FIG. 5 is a circuit diagram of the voltage sampling circuit of the present invention;
FIG. 6 is a circuit diagram of the current sampling circuit of the present invention;
fig. 7 is a schematic diagram of an ac system of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic block diagram of an ac system switch measurement and control device provided by the present invention.
As shown in fig. 1, the ac system switch measurement and control device may include: a detection interface circuit 102 that receives and processes the access signal and outputs a detection signal; a control interface circuit 103 for receiving and processing the control signal and outputting the control signal; a sampling unit 106 that receives an input signal, detects the input signal, and outputs a sampling signal; and the controller 101 is connected with the detection interface circuit 102, the control interface circuit 103 and the sampling unit 106, and the controller 101 receives the detection signal and the sampling signal and outputs a control signal to the control interface circuit 103 according to the detection signal and the sampling signal.
In some embodiments, as shown in fig. 2, the ac system switch measurement and control device may be provided with a plurality of detection interfaces, wherein each detection interface is configured with a detection interface circuit 102. Specifically, as shown in fig. 2, in some embodiments, the ac system switch measurement and control device may be provided with 5 detection interfaces, namely a detection interface 1, a detection interface 2, a detection interface 3, a detection interface 4, and a detection interface 5, where the detection interface 1 is used to detect whether the switch is switched on or off; the detection interface 2 is used for detecting whether the switch is tripped or not; the detection interface 3 is used for detecting the remote/local state of the system; when the device is in a remote state, the automatic brake opening operation is allowed; when the detection interface 4 is used as an inlet switch measurement and control device, whether the bus coupler switch is opened or not is detected; when the device is used as a bus coupler switch measurement and control device, a signal output by a control interface of a 1# inlet wire switch measurement and control device is received; when the detection interface 5 is used as an inlet switch measurement and control device, a signal output by a control interface of the bus coupler switch measurement and control device is received.
In some embodiments, as shown in fig. 2, the ac system switch measurement and control device may be provided with a plurality of control interfaces. Wherein each control interface is provided with a control interface circuit 103. As shown in fig. 2, 3 control interfaces may be provided, including a control interface 1, a control interface 2, and a control interface 3. When the control interface 3 is used as an inlet switch measurement and control device, a signal is sent to a bus coupler switch measurement and control device to indicate that the inlet switch is processed, and the bus coupler switch has operating conditions; when the bus coupler switch measurement and control device is used, signals are sent to the 1# and 2# inlet wire switch measurement and control devices to indicate that the bus coupler switch is processed, and the inlet wire switch has operation conditions.
Further, as shown in fig. 2, in some embodiments, the ac system switch measurement and control device further includes: and a communication interface 105 connected to the controller 101 for the controller 101 to communicate with external devices. Optionally, the communication interface 105 may be an RS485 interface, which allows the controller 101 to communicate with a background server or monitor.
Further, as shown in fig. 2, in some embodiments, the ac system switch measurement and control device further includes: and a configuration interface 104 connected with the controller 101 for the controller 101 to perform address configuration. The differentiation of the device addresses can be achieved by the configuration interface 104.
In some embodiments, as shown in FIG. 3, the detection interface circuit 102 includes: the circuit comprises a first resistor R1, a first voltage regulator tube ZD1, a first capacitor C1, a second resistor R2, a photoelectric coupler U7 and a third resistor R3.
The first end of the first resistor R1 is connected with the detection interface, the second end of the first resistor R1 is connected with the cathode of the first voltage regulator tube ZD1, the first end of the first capacitor C1 and the first end of the second resistor R2, and the anode of the first voltage regulator tube ZD1 and the second end of the first capacitor C1 are grounded; a second end of the second resistor R2 is connected with a first end of a photoelectric coupler U7, a second end of the photoelectric coupler U7 is grounded, a third end of the photoelectric coupler U7 is connected with the controller 101, and a fourth end of the photoelectric coupler U7 is grounded; the first end of the third resistor R3 is connected with high level, and the second end of the third resistor R3 is connected with the third end of the photocoupler U7.
The controller 101 can be prevented from being interfered by the outside world by adopting optical coupling isolation, wherein I1 and 24V in FIG. 3 are detection interfaces, and D1 is connected with an input level detection pin of the controller 101. When the voltage is switched on between 24V and I1, D1 outputs low level, and when the voltage is switched off between 24V and I1, D1 outputs high level.
As shown in fig. 4, in some embodiments, the control interface circuit 103 includes: the circuit comprises a fourth resistor R4, a fifth resistor R5, a first triode Q1, a second voltage regulator ZD2 and a relay K1.
The first end of a fourth resistor R4 is connected with the controller 101, the second end of the fourth resistor R4 is connected with the first end of a fifth resistor R5 and the base electrode of a first triode Q1, the second end of the fifth resistor R5 and the source electrode of a first triode Q1 are connected with a power supply voltage, the collector electrode of the first triode Q1 is connected with the first end of the coil of the relay K1 and the cathode of a second voltage regulator ZD2, the anode of the second voltage regulator ZD2 and the second end of the coil of the relay K1 are grounded, and the input contact of a contact terminal of the relay K1 is controlled by a switch.
Electrical isolation can be achieved by using relay K1. As shown in FIG. 4, O1 is connected to the output pin of the controller 101, and the contacts K1+ and K1-of the relay K1 are connected to the input contacts of the controlled switch. When O1 outputs high level, K1+ and K1-are disconnected, and when O1 outputs low level, K1+ and K1-are connected.
In some embodiments, the sampling unit 106 includes: a voltage sampling circuit 1061 and a current sampling circuit 1062. The voltage sampling circuit 1061 is configured to detect a voltage and output a voltage sampling signal to the controller 101; the current sampling circuit 1062 is used for detecting the current and outputting a current sampling signal to the controller 101.
Optionally, the voltage sampling circuit 1061 is an ac three-phase voltage sampling circuit 1061.
As shown in fig. 5, in some embodiments, the voltage sampling circuit 1061 includes: the circuit comprises a sixth resistor R6, a first voltage transformer T1, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a second capacitor C2 and a third capacitor C3.
A first end of a sixth resistor R6 is connected with a live wire, a second end of a sixth resistor R6 is connected with a first end of a first voltage transformer T1, a second end of the first voltage transformer T1 is connected with a zero wire, a third end of the first voltage transformer T1 is connected with a first end of a seventh resistor R7 and a first end of a ninth resistor R9, a second end of the seventh resistor R7 and a second end of an eighth resistor R8 are grounded, and a first end of an eighth resistor R8 and a first end of a tenth resistor R10 are connected with a fourth end of the first voltage transformer T1; a second end of the ninth resistor R9 is connected to a first end of the third capacitor C3 and to the controller 101; the second terminal of the third capacitor C3 and the second terminal of the second capacitor C2 are grounded, and the second terminal of the tenth resistor R10 is connected to the first terminal of the second capacitor C2 and to the controller 101.
As shown in fig. 5, U1 is a live wire of one of three phases of power, N1 is a neutral wire, a secondary coil of a first voltage transformer T1 forms a loop with a seventh resistor R7 and an eighth resistor R8 to convert a current signal into a voltage signal, and U1P and U1N are voltage sampling input pins of the controller 101.
As shown in fig. 6, in some embodiments, the current sampling circuit 1062 includes: the circuit comprises a first current transformer L1, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fourth capacitor C4 and a fifth capacitor C5.
A first end of the first current transformer L1 is connected with a first end of an eleventh resistor R11 and a first end of a thirteenth resistor R13; a second end of the eleventh resistor R11 and a second end of the twelfth resistor R12 are grounded, and a first end of the twelfth resistor R12 and a first end of the fourteenth resistor R14 are connected with a second end of the first current transformer L1; a second terminal of the thirteenth resistor R13 is connected to the first terminal of the fourth capacitor C4 and to the controller 101, and a second terminal of the fourth capacitor C4 and a second terminal of the fifth capacitor C5 are grounded; a second terminal of the fourteenth resistor R14 is connected to the first terminal of the fifth capacitor C5 and to the controller 101.
As shown in fig. 6, the first current transformer L1 forms a loop with the eleventh resistor R11 and the twelfth resistor R12 to convert the current signal into a voltage signal; A1P, A1N are current sampling input pins of controller 101.
Furthermore, the utility model also provides an alternating current system which can comprise at least one alternating current system switch measurement and control device disclosed by the embodiment of the utility model.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an ac system according to an embodiment of the present invention. As shown in fig. 3, the bus coupler switch measurement and control module of the 1# inlet switch measurement and control module and the 2# inlet switch measurement and control module are both the alternating current system switch measurement and control device disclosed by the embodiment of the utility model.
In fig. 7, the open side indicates a detection interface, and the open side indicates a control interface.
The wiring of the ac system of this embodiment is described below:
as shown in fig. 7, when the ac system switch measurement and control device is used as a line inlet switch, the switch-in 1 is connected to the switching-on/switching-off auxiliary contact of the line inlet switch, the switch-in 2 is connected to the tripping-state auxiliary contact of the line inlet switch, the switch-in 3 is connected to the remote/local auxiliary contact of the ac system, the switch-in 4 is connected to the switching-on/switching-off auxiliary contact of the bus gang switch (the switching-on/switching-off auxiliary contact of the bus gang switch divides an auxiliary contact signal into 3 auxiliary contact signals through an intermediate relay), and the switch-in 5 is connected to the switch-out 3 of the bus gang switch; an outlet 1 is connected with a closing contact of the incoming line switch, an outlet 2 is connected with an opening contact of the incoming line switch, and an outlet 3 is connected with an inlet 5 interface of a bus-coupled alternating current system switch measurement and control device;
when the alternating current system switch measurement and control device is used as a bus coupler switch, an opening 1 is connected with a switching-on/off auxiliary contact of the bus coupler switch, an opening 2 is connected with a tripping state auxiliary contact of the bus coupler switch, an opening 3 is connected with a remote/local auxiliary contact of an alternating current system, an opening 4 is connected with an opening 3 of a 1# incoming line alternating current system switch measurement and control device, and an opening 5 is connected with an opening 3 of a 2# incoming line alternating current system switch measurement and control device; and an outlet 1 is connected with a closing auxiliary contact of the bus-coupled switch, an outlet 2 is connected with an opening auxiliary contact of the bus-coupled switch, and an outlet 3 is connected with an inlet 5 of a 1# and a 2# incoming line AC system switch measurement and control device.
As shown in fig. 7, the ac system is a two-line-one-bus ac system. Wherein, this two inlet wire one-line bus-bars allies oneself with AC system can realize following mode:
the local working mode is as follows: the remote/local device outputs local signals, and in the working mode, the monitor and the switch measurement and control module do not participate in the on-off operation of the incoming line and the bus coupler switch; the switch is switched on and off by manual mechanical operation;
remote manual working mode: the remote/local device outputs a remote signal, the monitor is set to work manually, and the set parameters are transmitted to the switch measurement and control module through RS 485;
remote automatic working mode: the output of the remote/local device is a remote signal, the monitor is set to automatically work, and the opening action of each switch measurement and control module is shown as the following table in the working mode:
by adopting the alternating-current system switch measurement and control device, the system can automatically complete the function of self-switching and self-resetting through the states of the incoming line voltage, the incoming line switch and the bus switch, and the mutual locking function between the switches is realized through the auxiliary contact, so that the misoperation is avoided; meanwhile, the system can be set to be in a local working mode, a remote manual mode and a remote automatic mode according to the requirements of users.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention. It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides an exchange system switch measurement and control device which characterized in that includes:
the detection interface circuit receives an access signal, processes the access signal and outputs a detection signal;
the control interface circuit receives and processes the control signal and outputs the control signal;
the sampling unit is used for receiving an input signal, detecting the input signal and outputting a sampling signal;
and the controller is connected with the detection interface circuit, the control interface circuit and the sampling unit, receives the detection signal and the sampling signal, and outputs the control signal to the control interface circuit according to the detection signal and the sampling signal.
2. The ac system switch measurement and control device of claim 1, wherein the detection interface circuit comprises: the circuit comprises a first resistor, a first voltage regulator tube, a first capacitor, a second resistor, a photoelectric coupler and a third resistor;
the first end of the first resistor is connected with the detection interface, the second end of the first resistor is connected with the cathode of the first voltage-regulator tube, the first end of the first capacitor and the first end of the second resistor, and the anode of the first voltage-regulator tube and the second end of the first capacitor are grounded; the second end of the second resistor is connected with the first end of the photoelectric coupler, the second end of the photoelectric coupler is grounded, the third end of the photoelectric coupler is connected with the controller, and the fourth end of the photoelectric coupler is grounded; and the first end of the third resistor is connected with a high level, and the second end of the third resistor is connected with the third end of the photoelectric coupler.
3. The ac system switch measurement and control device of claim 1, wherein the control interface circuit comprises: the fourth resistor, the fifth resistor, the first triode, the second voltage-regulator tube and the relay;
the first end of the fourth resistor is connected with the controller, the second end of the fourth resistor is connected with the first end of the fifth resistor and the base electrode of the first triode, the second end of the fifth resistor and the source electrode of the first triode are connected with power supply voltage, the collector electrode of the first triode is connected with the first end of the coil of the relay and the cathode of the second voltage regulator tube, the anode of the second voltage regulator tube and the second end of the coil of the relay are grounded, and the input contact of the relay is controlled by the switch.
4. The ac system switch measurement and control device of claim 1, wherein the sampling unit comprises: a voltage sampling circuit and a current sampling circuit;
the voltage sampling circuit is used for detecting voltage and outputting a voltage sampling signal to the controller;
the current sampling circuit is used for detecting current and outputting a current sampling signal to the controller.
5. The AC system switch measurement and control device according to claim 4, wherein the voltage sampling circuit is an AC three-phase voltage sampling circuit.
6. The ac system switch measurement and control device of claim 4, wherein the voltage sampling circuit comprises: the first resistor, the second resistor, the third resistor, the fourth resistor, the sixth resistor, the first voltage transformer, the seventh resistor, the eighth resistor, the ninth resistor, the tenth resistor, the second capacitor and the third capacitor;
a first end of the sixth resistor is connected with a live wire, a second end of the sixth resistor is connected with a first end of the first voltage transformer, a second end of the first voltage transformer is connected with a zero line, a third end of the first voltage transformer is connected with a first end of the seventh resistor and a first end of the ninth resistor, a second end of the seventh resistor and a second end of the eighth resistor are grounded, and a first end of the eighth resistor and a first end of the tenth resistor are connected with a fourth end of the first voltage transformer; a second end of the ninth resistor is connected with a first end of the third capacitor and the controller; the second end of the third capacitor and the second end of the second capacitor are grounded, and the second end of the tenth resistor is connected with the first end of the second capacitor and the controller.
7. The ac system switch measurement and control device of claim 4, wherein the current sampling circuit comprises: the circuit comprises a first current transformer, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor and a fifth capacitor;
the first end of the first current transformer is connected with the first end of the eleventh resistor and the first end of the thirteenth resistor; a second end of the eleventh resistor and a second end of the twelfth resistor are grounded, and a first end of the twelfth resistor and a first end of the fourteenth resistor are connected with a second end of the first current transformer; a second end of the thirteenth resistor is connected with a first end of the fourth capacitor and the controller, and a second end of the fourth capacitor and a second end of the fifth capacitor are grounded; a second end of the fourteenth resistor is connected to the first end of the fifth capacitor and to the controller.
8. The ac system switch measurement and control device of claim 1, further comprising: and the communication interface is connected with the controller and is used for the controller to communicate with external equipment.
9. The ac system switch measurement and control device of claim 1, further comprising: and the configuration interface is connected with the controller and used for the controller to carry out address configuration.
10. An ac system comprising at least one ac system switch test control device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121539403.5U CN215576198U (en) | 2021-07-07 | 2021-07-07 | Alternating current system switch measurement and control device and alternating current system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121539403.5U CN215576198U (en) | 2021-07-07 | 2021-07-07 | Alternating current system switch measurement and control device and alternating current system |
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| CN215576198U true CN215576198U (en) | 2022-01-18 |
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