CN114217155B - State detection circuit and terminal of secondary cell clamp plate in distribution network looped netowrk case - Google Patents
State detection circuit and terminal of secondary cell clamp plate in distribution network looped netowrk case Download PDFInfo
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- CN114217155B CN114217155B CN202111529020.4A CN202111529020A CN114217155B CN 114217155 B CN114217155 B CN 114217155B CN 202111529020 A CN202111529020 A CN 202111529020A CN 114217155 B CN114217155 B CN 114217155B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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Abstract
The application discloses a state detection circuit and a terminal of a secondary cell pressing plate in a distribution network ring main unit, wherein the circuit comprises: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit; the input port is used for connecting the pressing plate and collecting pressing plate data; the power supply circuit is used for providing power for the state detection circuit; the protection circuit is used for rectifying and dividing pressure plate data to obtain output data; the comparison circuit is used for comparing the output data with the reference voltage to obtain a comparison signal; the input end of the output circuit is connected with the comparison signal; the output port is connected with the output end of the output circuit and used for collecting circuit data in the output circuit, and the circuit data is used for judging the pressing plate state of the pressing plate. The technical problems that when the state of the pressing plate is collected, the existing pressing plate on site needs to be refitted into the cross-shaped pressing plate, the transformation cost is high, and then the cost is high during state collection are solved.
Description
Technical Field
The application belongs to the technical field of distribution networks, and particularly relates to a state detection circuit and a terminal of a secondary cell pressing plate in a distribution network ring main unit.
Background
In order to improve the automation management level and the practical effect of the distribution network, the requirement for detecting the state of the secondary small indoor pressing plate in the ring main unit of the distribution network is increasingly urgent.
In the prior art, in order to collect the state of the pressing plate, a cross-shaped pressing plate is designed. The platen has two loops, the two loop states being synchronized. One loop can be used for status acquisition. However, when the scheme is implemented, the existing pressing plate on the site needs to be modified into the cross-shaped pressing plate, so that the modification cost is high, and the cost is high during state acquisition.
Disclosure of Invention
In view of the above, the application provides a state detection circuit and a terminal for a secondary cell pressing plate in a distribution network ring main unit, which solve the technical problems that when the state of the pressing plate is acquired, the existing pressing plate on site needs to be modified into a cross pressing plate, the modification cost is high, and the cost is high during state acquisition.
The first aspect of the present application provides a state detection circuit for a secondary cell pressing plate in a distribution network ring main unit, comprising: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit;
the input port is used for connecting two access ends of the pressing plate and is used for collecting pressing plate data;
the power supply circuit is used for providing power for the state detection circuit;
the protection circuit is used for rectifying and dividing the pressure plate data to obtain output data;
the comparison circuit is used for comparing the output data with a reference voltage to obtain a comparison signal;
the input end of the output circuit is connected with the comparison signal;
the output port is connected with the output end of the output circuit and is used for collecting circuit data in the output circuit, and the circuit data are used for judging the pressing plate state of the pressing plate.
Alternatively, the process may be carried out in a single-stage,
the protection circuit includes: diode D5, diode D6, diode D8, resistor R14, resistor R15, zener diode DZ2, resistor R18, and rectifier B2;
the anode of the diode D5 is connected with a power circuit, and the cathode of the diode D6 is connected with the anode of the diode D8;
the cathode of the diode D6 is connected with the first end of the resistor R14;
the positive electrode of the diode D8 is connected with the first end of the rectifier B2 and the input end of the comparison circuit;
the second end of the resistor R14 is connected with the input port and the first end of the resistor R15;
a second end of the resistor R15 is connected with a second end of the rectifier B2;
the positive electrode of the voltage stabilizing diode DZ2 is connected with the third end of the rectifier B2, and the negative electrode of the voltage stabilizing diode DZ2 is connected with the positive electrode of the diode D8;
the fourth end of the rectifier B2 is connected with the input port and the first end of the resistor R18;
the second terminal of the resistor R18 is grounded.
Alternatively, the process may be carried out in a single-stage,
the protection circuit further includes: a capacitor C16, a capacitor C21, and a capacitor C14;
the first end of the capacitor C16 is connected with the cathode of the diode D8, and the second end of the capacitor C is connected with the anode of the zener diode DZ 2;
the first end of the capacitor C21 is connected with the cathode of the diode D8, and the second end of the capacitor C is connected with the anode of the zener diode DZ 2;
the first end of the capacitor C14 is connected to the first end of the rectifier B2, and the second end is connected to the second end of the resistor R14.
Alternatively, the process may be carried out in a single-stage,
the output circuit of the reference voltage includes: a reference voltage output port, a resistor R24, a resistor R27 and a capacitor C24;
the reference voltage output port is used for outputting reference voltage;
the first end of the resistor R24 is connected with the cathode of the diode D8, and the second end of the resistor R24 is connected with the reference voltage output port, the first end of the resistor R27 and the first end of the capacitor C24;
a second terminal of the resistor R27 is connected to a second terminal of the capacitor C24.
Alternatively, the process may be carried out in a single-stage,
the comparison circuit includes: voltage comparator OPA2, capacitor C22, resistor R25, resistor R21, resistor R20, resistor R22, capacitor C15, resistor R23, capacitor C23, resistor R26, and transistor Q2;
the first end of the resistor R21 is connected with the reference voltage output port, and the second end of the resistor R20 is connected with the first end of the resistor R20 and the positive input end of the voltage comparator OPA 2;
the second end of the resistor R20 is connected with the output end of the voltage comparator OPA 2;
the first end of the capacitor C22 is connected with the positive electrode of the diode D8 and the negative input end of the voltage comparator OPA2, and the second end of the capacitor C is grounded;
the first end of the resistor R25 is connected with the negative input end of the voltage comparator OPA2, and the second end is grounded;
the first end of the capacitor C15 is grounded, and the second end of the capacitor C is connected with the first end of the resistor R22;
the second end of the resistor R22 is connected with the output end of the voltage comparator OPA2 and the first end of the resistor R23;
the second end of the resistor R23 is connected with the first end of the capacitor C23, the first end of the resistor R26 and the grid electrode of the triode;
a second end of the capacitor C23 is connected with a second end of the resistor R26 and grounded;
the source electrode of the triode Q2 is grounded, and the drain electrode is connected with the output circuit.
Alternatively, the process may be carried out in a single-stage,
the output circuit includes: optocoupler output U2, relay RY2, diode D7, resistor R16, and resistor R19;
the first end of the resistor R16 is connected with the power supply circuit and the first end of the resistor R19, and the second end of the resistor R16 is connected with the first input end of the optocoupler output piece U2;
the second end of the resistor R19 is connected with the second input end of the optocoupler output piece U2 and the drain electrode of the triode Q2;
the output end of the optical coupler output piece U2 is connected with the output port;
and the input end of the relay RY2 is connected with the drain electrode of the triode Q2, and the output end is connected with the output port.
The second aspect of the present application provides a state detection terminal for a secondary cell pressing plate in a distribution network ring main unit, comprising: an input terminal, an output terminal, a device body, and any one of the state detection circuits as described above;
the input terminal, the output terminal and the state detection circuit are all arranged on the device main body;
the input terminal is connected with the input port of the state detection circuit;
the output terminal is connected with the output port of the state detection circuit.
Alternatively, the process may be carried out in a single-stage,
further comprises: an indicator light;
the indicator lamp is arranged on the outer side wall of the device main body and used for indicating the working state of the state detection terminal.
Alternatively, the process may be carried out in a single-stage,
the installation side of the device main body is provided with a groove for installing the state detection terminal.
Alternatively, the process may be carried out in a single-stage,
the grooves are rectangular grooves.
From the above technical scheme, the application has the following advantages:
the application provides a state detection circuit of a secondary cell pressing plate in a distribution network ring main unit, which comprises the following components: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit; the input port is used for connecting the pressing plate and collecting pressing plate data; the power supply circuit is used for providing power for the state detection circuit; the protection circuit is used for rectifying and dividing pressure plate data to obtain output data; the comparison circuit is used for comparing the output data with the reference voltage to obtain a comparison signal; the input end of the output circuit is connected with the comparison signal; the output port is connected with the output end of the output circuit and used for collecting circuit data in the output circuit, and the circuit data is used for judging the pressing plate state of the pressing plate.
According to the application, after the pressure plate data are acquired through the input port, the pressure plate data are compared and analyzed through the cooperation of the protection circuit and the comparison circuit, and then the circuit data for judging the pressure plate state can be acquired through the output port after the pressure plate data are output through the output circuit, so that the pressure plate state can be detected through the circuit data, and the existing pressure plate is not required to be modified in the use process, thereby solving the technical problems that the existing pressure plate on site is required to be modified into a cross-shaped pressure plate when the pressure plate state is acquired, the modification cost is high, and the cost is high when the state is acquired.
Drawings
FIG. 1 is a schematic block diagram of a state detection circuit for a secondary cell platen in a distribution network ring main unit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a state detection circuit of a secondary cell pressing plate in a distribution network ring main unit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram II of a state detection circuit of a secondary cell pressing plate in a distribution network ring main unit according to an embodiment of the present application;
fig. 4 is a schematic diagram of a power circuit according to an embodiment of the application.
Detailed Description
The embodiment of the application provides a state detection circuit and a terminal of a secondary cell pressing plate in a distribution network ring main unit, which solve the technical problems that when the state of the pressing plate is acquired, the existing pressing plate on site needs to be modified into a cross-shaped pressing plate, the modification cost is high, and the cost is high during state acquisition.
The following description of the embodiments of the present application will be made in detail, but not necessarily all embodiments, with reference to the accompanying drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the embodiments of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in embodiments of the present application will be understood in detail by those of ordinary skill in the art.
First, partial nouns or terms appearing in the course of describing the embodiments of the application are explained as follows:
and (3) pressing plates: the connection piece with two access ends may be charged when it is connected to the circuit.
An embodiment of a state detection circuit for a secondary cell pressing plate in a distribution network ring main unit is provided in the present application, and refer to fig. 1 specifically.
The state detection circuit of the secondary cell clamp plate in the distribution network ring main unit in this embodiment includes: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit; the input port is used for connecting the pressing plate and collecting pressing plate data; the power supply circuit is used for providing power for the state detection circuit; the protection circuit is used for rectifying and dividing pressure plate data to obtain output data; the comparison circuit is used for comparing the output data with the reference voltage to obtain a comparison signal; the input end of the output circuit is connected with the comparison signal; the output port is connected with the output end of the output circuit and used for collecting circuit data in the output circuit, and the circuit data is used for judging the pressing plate state of the pressing plate.
It will be appreciated that the comparison circuit may be implemented by a variety of existing comparison structures, such as comparators, etc., provided that the comparison of voltages is enabled. The protection circuit may also have various structures such as a current rectifying circuit, a voltage stabilizing circuit, and a voltage dividing circuit, which are not particularly limited in this embodiment.
In view of the above-mentioned problems in the background art, when the detection circuit in this embodiment is used, after the platen data is collected through the input port, the platen data is compared and analyzed through the cooperation of the protection circuit and the comparison circuit, after the platen data is output through the output circuit, the circuit data for judging the platen state can be obtained through the output port, the detection of the platen state can be realized through the circuit data, and the existing platen is not required to be modified in the use process, so that the technical problems that when the platen state is collected in the prior art, the existing platen on site needs to be modified into a cross-shaped platen, the modification cost is high, and the cost is high when the state is collected are solved.
The first embodiment of the state detection circuit for a secondary cell pressing plate in a distribution network ring main unit provided by the embodiment of the present application is the second embodiment of the state detection circuit for a secondary cell pressing plate in a distribution network ring main unit provided by the embodiment of the present application, and refer to fig. 1 to 3 specifically.
The state detection circuit of the secondary cell clamp plate in the distribution network ring main unit in this embodiment includes: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit; the input port is used for connecting the pressing plate and collecting pressing plate data; the power supply circuit is used for providing power for the state detection circuit; the protection circuit is used for rectifying and dividing pressure plate data to obtain output data; the comparison circuit is used for comparing the output data with the reference voltage to obtain a comparison signal; the input end of the output circuit is connected with the comparison signal; the output port is connected with the output end of the output circuit and used for collecting circuit data in the output circuit, and the circuit data is used for judging the pressing plate state of the pressing plate.
Specifically, the protection circuit in the present embodiment includes: diode D5, diode D6, diode D8, resistor R14, resistor R15, zener diode DZ2, resistor R18, and rectifier B2; the anode of the diode D5 is connected with a power circuit, and the cathode of the diode D6 is connected with the anode of the diode D8; the cathode of the diode D6 is connected with the first end of the resistor R14; the anode of the diode D8 is connected with the first end of the rectifier B2 and the input end of the comparison circuit; the second end of the resistor R14 is connected with the input port and the first end of the resistor R15; the second end of the resistor R15 is connected with the second end of the rectifier B2; the positive electrode of the voltage stabilizing diode DZ2 is connected with the third end of the rectifier B2, and the negative electrode of the voltage stabilizing diode DZ2 is connected with the positive electrode of the diode D8; the fourth end of the rectifier B2 is connected with the input port and the first end of the resistor R18; the second end of the resistor R18 is grounded, and the anode of the zener diode DZ2 is grounded.
It will be appreciated that the resistor R14, resistor R15, resistor R25 and capacitor C22 in the protection circuit determine the speed of rise and fall of the V2 voltage. The voltage across the capacitor C22 cannot be suddenly changed, so when V2 increases, the capacitor C22 is charged through the resistor R25, the voltage V2, i.e. the voltage across the capacitor C22 increases, the charging time is 3×r25×c22, and thus the resistance of the resistor R25 and the capacitance of the capacitor C22 determine the charging speed. When V2 decreases, the capacitor C22 discharges for 3×r25×c22, so the resistance of the resistor R25 and the capacitance of the capacitor C22 determine the discharging speed. The rising and falling speed of the V2 voltage can be adjusted by setting specific resistance values and capacitance values.
Specifically, the protection circuit in the present embodiment further includes: a capacitor C16, a capacitor C21, and a capacitor C14; the first end of the capacitor C16 is connected with the cathode of the diode D8, and the second end is connected with the anode of the zener diode DZ 2; the first end of the capacitor C21 is connected with the cathode of the diode D8, and the second end of the capacitor C is connected with the anode of the zener diode DZ 2; the first end of the capacitor C14 is connected to the first end of the rectifier B2, and the second end is connected to the second end of the resistor R14. The second ends of the capacitors C16 and C21 are grounded.
Specifically, the output circuit of the reference voltage includes: a reference voltage output port, a resistor R24, a resistor R27 and a capacitor C24; the reference voltage output port is used for outputting a reference voltage; the first end of the resistor R24 is connected with the cathode of the diode D8, and the second end of the resistor R24 is connected with the reference voltage output port, the first end of the resistor R27 and the first end of the capacitor C24; a second terminal of the resistor R27 is connected to the second terminal of the capacitor C24 and then grounded.
It will be appreciated that the resistor R24, the resistor R27 and the capacitor C24 in the output circuit of the reference voltage determine the voltage ramp rate of the reference voltage VREF 2. The voltage across the capacitor C24 cannot be suddenly changed, so when VCC2 increases, the capacitor C24 is charged through the resistor R24, the reference voltage VREF2, i.e. the voltage across the capacitor C24 increases, and the charging time is 3×r24×c24, so the resistance of the resistor R24 and the capacitance of the capacitor C24 determine the charging speed. When VCC2 decreases, capacitor C24 discharges for 3×r24×c24, so the resistance of resistor R24 and the capacitance of capacitor C24 determine the discharging speed.
Specifically, the comparison circuit in the present embodiment includes: voltage comparator OPA2, capacitor C22, resistor R25, resistor R21, resistor R20, resistor R22, capacitor C15, resistor R23, capacitor C23, resistor R26, and transistor Q2; the first end of the resistor R21 is connected with a reference voltage output port, and the second end of the resistor R20 is connected with the first end of the resistor R20 and the positive input end of the voltage comparator OPA 2; the second end of the resistor R20 is connected with the output end of the voltage comparator OPA 2; the first end of the capacitor C22 is connected with the anode of the diode D8 and the negative input end of the voltage comparator OPA2, and the second end is grounded; the first end of the resistor R25 is connected with the negative input end of the voltage comparator OPA2, and the second end is grounded; the first end of the capacitor C15 is grounded, and the second end of the capacitor C is connected with the first end of the resistor R22; the second end of the resistor R22 is connected with the output end of the voltage comparator OPA2 and the first end of the resistor R23; the second end of the resistor R23 is connected with the first end of the capacitor C23, the first end of the resistor R26 and the grid electrode of the triode; a second end of the capacitor C23 is connected with a second end of the resistor R26; the source electrode of the triode Q2 is grounded, and the drain electrode is connected with the output circuit. A second input terminal of the voltage comparator OPA2 is grounded. It will be appreciated that the voltage comparator OPA2 may be LMV331TP-TR, in which configuration pin 1 is a positive input, pin 2 is a ground, pin 3 is a negative input, pin 4 is an output, pin 5 is a power supply, and power VCC2 is externally connected.
In the above structure, the junction of the resistor R25 and the capacitor C22 is grounded.
When the pressing plate is put into or withdrawn, the screw needs to be screwed by hand, the pressing plate connecting sheet is turned on and off in the screwing process, if hardware shake elimination is not performed, the relay RY2 can be frequently separated and combined, the sound of the action of the relay RY2 can be heard, and the shake elimination purpose is to remove unnecessary frequent actions of the relay RY2 during the screw tightening or loosening.
Therefore, in this embodiment, through specific setting of the resistance value and the capacitance value, the level relationship between the positive and negative input pins of the voltage comparator OPA2 is specified under the condition that the pressing plate is not put into the product when the product is started, so as to implement the first-stage jitter elimination on the hardware level.
It can be understood that the resistor R22, the resistor R23, the resistor R26 and the capacitor C23 form a second-stage jitter elimination circuit on the hardware level, the voltage at two ends of the capacitor C23 can control the on-off of the triode Q2, and the on-off state of the pressing plate can be filtered by controlling the lifting speed of the capacitor C23. The debounce time can be set by adjusting the relevant resistance-capacitance value according to actual needs.
Specifically, the output circuit in the present embodiment includes: optocoupler output U2, relay RY2, diode D7, resistor R16, and resistor R19; the first end of the resistor R16 is connected with the power supply circuit and the first end of the resistor R19, and the second end of the resistor R16 is connected with the first input end of the optocoupler output piece U2; the second end of the resistor R19 is connected with the second input end of the optocoupler output piece U2 and the drain electrode of the triode Q2; the output end of the optical coupler output piece U2 is connected with an output port; the input end of the relay RY2 is connected with the drain electrode of the triode Q2, and the output end is connected with the output port. Wherein the output of the optocoupler output U2 is also connected to ground. The optocoupler U2 may be an optocoupler LTV-217.
It will be appreciated that for a specific input port and application of the input port in the detection circuit, referring to fig. 2 and 3, the inputs of the clamp2_i and the clamp2_i are the inputs at two ends of the detection circuit, when the platen is time-sharing, the output level of V2 is relatively low, the output of the voltage comparator OPA2 is also low, and no output signal is provided at the output port. When the pressing plate is in the state of being equal to the preset value, the output level of V2 is higher, the voltage comparator OPA2 outputs a high level, the driving relay RY2RY2 is closed, and a signal exists at an output port. Wherein, the Clamp2_O and Clamp2_O are empty contact outputs, namely output ports of the detection circuit.
The state detection circuit in the embodiment supports two output modes, and the empty contact is in communication with RS485, so that multiple acquisition modes are met. When the remote measurement and control protection device has enough remote signaling acquisition capacity, the empty contact of the state detection circuit can be directly connected into a remote signaling loop of the measurement and control protection device, and the scheme only needs to change the point table of the measurement and control protection device, so that the workload is minimum. When the measurement and control protection device does not have enough remote signaling acquisition capability, if redundant communication ports exist, acquisition can be performed through a protocol, the measurement and control protection device may need to update a program, modify a point table and have more workload. When the measurement and control protection device cannot complete the acquisition task, the comprehensive communication unit can acquire the data through RS485 communication, an RS485 communication line is required, and the comprehensive communication unit may need to update a program, modify a point table and the like.
The detection method adopted by the state detection circuit can meet the access detection of the empty contact and the active contacts with various voltage classes. The active contact meets the access of voltage classes below direct current 300V and below alternating current 250V, meets the detection of voltage classes of a spring operating mechanism DC24V, DC48V, DC, a permanent magnet mechanism DC220V, an electromagnetic mechanism AC220V and the like, and covers all distribution network pressing plate detection scenes.
As shown in fig. 4, the power supply circuit of the state detection circuit in this embodiment adopts DC power supply, supports wide voltage input, and has an effective range (DC 18V-75V), and satisfies the situations of 24V power supply and 48V power supply. In this embodiment, the power supply of the state detection circuit is performed using a VCC2_5v voltage and a vcc_5v power supply. In fig. 4, a capacitor C11 is provided between the power source VCC2_5v and the ground GND2, and a capacitor C12 is provided between vcc_5v and the ground GND.
The state detection circuit in the embodiment adopts high-voltage DC/DC isolation power supply to ensure that interference among measurement loops cannot be generated due to the use of the same power supply. When the input impedance is 200kΩ and the platen is in the non-throw-in state, the current generated in the circuit is less than milliamp, and the circuit malfunction is not caused.
It will be appreciated that V2 is the output of the protection circuit, i.e. the input of the comparison circuit. In this embodiment, the comparison circuit and the protection circuit are connected, and the connection relationship between the comparison circuit and the protection circuit is represented by the same voltage value V2 due to the limitation of the figure.
Compared with the prior art, the state detection circuit in the embodiment has the following advantages:
1. the technical scheme is that the press plate state detection of the put-into-operation ring main unit is improved, the function upgrading can be realized without replacing the original press plate, the cost is low, the construction and installation are convenient, and the reliability is high.
2. The device of the embodiment can also be used for a new ring main unit, when the measurement and control protection device does not have enough remote signaling acquisition capability, the state acquisition can be performed through communication, the replacement of the measurement and control protection device is not needed, and the usability of the original measurement and control protection device is prolonged.
3. The detection method can meet the access detection of the empty contact and the active contact with various voltage levels, and covers all detection scenes of the distribution network pressing plate.
4. The jitter elimination function of the hardware level is supported, and the situations of false alarm and relay misoperation caused by jitter when the pressing plate is manually thrown and retreated are reduced.
When the detection circuit in the embodiment is used, after the pressure plate data are acquired through the input port, the pressure plate data are compared and analyzed through the cooperation of the protection circuit and the comparison circuit, after the pressure plate data are output through the output circuit, the circuit data for judging the pressure plate state can be acquired through the output port, the pressure plate state can be detected through the circuit data, the existing pressure plate is not required to be modified in the use process, and therefore the technical problem that the existing pressure plate on site is required to be modified into a cross pressure plate when the pressure plate state is acquired is solved, the modification cost is high, and the cost is high when the state is acquired is solved.
The second embodiment of the state detection circuit for the secondary cell pressing plate in the distribution network ring main unit provided by the embodiment of the application is the following embodiment of the state detection terminal for the secondary cell pressing plate in the distribution network ring main unit provided by the embodiment of the application.
The state detection terminal of secondary cell clamp plate in distribution network looped netowrk case in this embodiment includes: an input terminal, an output terminal, a device body, and a state detection circuit according to any one of claims 1 to 6; the input terminal, the output terminal and the state detection circuit are all arranged on the device main body; the input terminal is connected with the input port of the state detection circuit; the output terminal is connected with the output port of the state detection circuit.
Specifically, the detection terminal in this embodiment further includes: an indicator light; the pilot lamp sets up on the lateral wall of device main part for instruct the operating condition of state detection terminal.
Further, the mounting side of the device body in this embodiment is provided with a groove for mounting the state detection terminal. The groove can be clamped at the installation position, so that the construction is convenient.
It is understood that the shape of the groove may be a regular shape such as a circle, a rectangle, a trapezoid, a triangle, etc., or may be an irregular shape.
Compared with the prior art, the state detection terminal in the embodiment has the following advantages:
1. the installation mode of the guide rail matched with the groove is adopted, the size is small, and the construction is convenient.
2. The terminal is installed on the guide rail of the secondary cell only by connecting the two ends of the original pressing plate to the input terminals of the terminal, if no guide rail reserved space exists, the terminal can be stuck to the inner side of the cabinet door in a 3M glue mode.
3. The terminal adopts a wide voltage direct current power supply effective range (DC 18V-75V), meets all application scenes of the distribution network, and is convenient for secondary indoor power taking.
4. A terminal can monitor at most 4 paths of pressing plates, and the requirement of a secondary cell of a distribution network ring main unit is met.
5. The access detection of the empty contact and the active contacts with various voltage classes can be satisfied.
6. Consider the mode when the measurement and control protection device gathers the clamp plate state. One via remote signaling and one via communication. In a remote signaling mode, the state of the pressing plate collected by the terminal is output through the relay RY2, when the pressing plate is pressed, the relay RY2 is closed, and when the pressing plate is in a time sharing mode, the relay RY2 is separated. Relay RY2 contact is an empty contact. In the communication mode, the terminal is provided with a CPU, and the state of the pressing plate can be acquired in a remote signaling mode and output through a protocol.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A state detection circuit of a secondary cell pressing plate in a distribution network ring main unit is characterized by comprising: the device comprises an input port, an output port, a power supply circuit, a protection circuit, a comparison circuit and an output circuit;
the input port is used for connecting two access ends of the pressing plate and is used for collecting pressing plate data;
the power supply circuit is used for providing power for the state detection circuit;
the protection circuit is used for rectifying and dividing the pressure plate data to obtain output data; wherein, the protection circuit includes: diode D5, diode D6, diode D8, resistor R14, resistor R15, zener diode DZ2, resistor R18, and rectifier B2;
the anode of the diode D5 is connected with a power circuit, and the cathode of the diode D6 is connected with the anode of the diode D8;
the cathode of the diode D6 is connected with the first end of the resistor R14;
the positive electrode of the diode D8 is connected with the first end of the rectifier B2 and the input end of the comparison circuit;
the second end of the resistor R14 is connected with the input port and the first end of the resistor R15;
a second end of the resistor R15 is connected with a second end of the rectifier B2;
the positive electrode of the voltage stabilizing diode DZ2 is connected with the third end of the rectifier B2, and the negative electrode of the voltage stabilizing diode DZ2 is connected with the positive electrode of the diode D8;
the fourth end of the rectifier B2 is connected with the input port and the first end of the resistor R18;
the second end of the resistor R18 is grounded;
the comparison circuit is used for comparing the output data with a reference voltage to obtain a comparison signal;
the input end of the output circuit is connected with the comparison signal;
the output port is connected with the output end of the output circuit and is used for collecting circuit data in the output circuit, and the circuit data is used for judging the pressing plate state of the pressing plate; wherein the output circuit of the reference voltage comprises: a reference voltage output port, a resistor R24, a resistor R27 and a capacitor C24;
the reference voltage output port is used for outputting reference voltage;
the first end of the resistor R24 is connected with the cathode of the diode D8, and the second end of the resistor R24 is connected with the reference voltage output port, the first end of the resistor R27 and the first end of the capacitor C24;
a second terminal of the resistor R27 is connected to a second terminal of the capacitor C24.
2. The state detection circuit of claim 1, wherein the protection circuit further comprises: a capacitor C16, a capacitor C21, and a capacitor C14;
the first end of the capacitor C16 is connected with the cathode of the diode D8, and the second end of the capacitor C is connected with the anode of the zener diode DZ 2;
the first end of the capacitor C21 is connected with the cathode of the diode D8, and the second end of the capacitor C is connected with the anode of the zener diode DZ 2;
the first end of the capacitor C14 is connected to the first end of the rectifier B2, and the second end is connected to the second end of the resistor R14.
3. The state detection circuit of claim 2, wherein the comparison circuit comprises: voltage comparator OPA2, capacitor C22, resistor R25, resistor R21, resistor R20, resistor R22, capacitor C15, resistor R23, capacitor C23, resistor R26, and transistor Q2;
the first end of the resistor R21 is connected with the reference voltage output port, and the second end of the resistor R20 is connected with the first end of the resistor R20 and the positive input end of the voltage comparator OPA 2;
the second end of the resistor R20 is connected with the output end of the voltage comparator OPA 2;
the first end of the capacitor C22 is connected with the positive electrode of the diode D8 and the negative input end of the voltage comparator OPA2, and the second end of the capacitor C is grounded;
the first end of the resistor R25 is connected with the negative input end of the voltage comparator OPA2, and the second end is grounded;
the first end of the capacitor C15 is grounded, and the second end of the capacitor C is connected with the first end of the resistor R22;
the second end of the resistor R22 is connected with the output end of the voltage comparator OPA2 and the first end of the resistor R23;
the second end of the resistor R23 is connected with the first end of the capacitor C23, the first end of the resistor R26 and the grid electrode of the triode;
a second end of the capacitor C23 is connected with a second end of the resistor R26 and grounded;
the source electrode of the triode Q2 is grounded, and the drain electrode is connected with the output circuit.
4. A state detection circuit according to claim 3, wherein the output circuit comprises: optocoupler output U2, relay RY2, diode D7, resistor R16, and resistor R19;
the first end of the resistor R16 is connected with the power supply circuit and the first end of the resistor R19, and the second end of the resistor R16 is connected with the first input end of the optocoupler output piece U2;
the second end of the resistor R19 is connected with the second input end of the optocoupler output piece U2 and the drain electrode of the triode Q2;
the output end of the optical coupler output piece U2 is connected with the output port;
and the input end of the relay RY2 is connected with the drain electrode of the triode Q2, and the output end is connected with the output port.
5. State detection terminal of secondary cell clamp plate in distribution network looped netowrk case, its characterized in that includes: an input terminal, an output terminal, a device body, and a state detection circuit according to any one of claims 1 to 4;
the input terminal, the output terminal and the state detection circuit are all arranged on the device main body;
the input terminal is connected with the input port of the state detection circuit;
the output terminal is connected with the output port of the state detection circuit.
6. The state detection terminal according to claim 5, further comprising: an indicator light;
the indicator lamp is arranged on the outer side wall of the device main body and used for indicating the working state of the state detection terminal.
7. The state detection terminal according to claim 6, wherein a mounting side of the device body is provided with a groove for mounting the state detection terminal.
8. The state detection terminal of claim 7, wherein the groove is a rectangular groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111529020.4A CN114217155B (en) | 2021-12-14 | 2021-12-14 | State detection circuit and terminal of secondary cell clamp plate in distribution network looped netowrk case |
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| CN202111529020.4A CN114217155B (en) | 2021-12-14 | 2021-12-14 | State detection circuit and terminal of secondary cell clamp plate in distribution network looped netowrk case |
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| CN114217155A (en) | 2022-03-22 |
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