CN113447810B - Device and method for realizing switching-on and switching-off operation detection and misoperation prevention of ring main unit - Google Patents
Device and method for realizing switching-on and switching-off operation detection and misoperation prevention of ring main unit Download PDFInfo
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- CN113447810B CN113447810B CN202110724232.1A CN202110724232A CN113447810B CN 113447810 B CN113447810 B CN 113447810B CN 202110724232 A CN202110724232 A CN 202110724232A CN 113447810 B CN113447810 B CN 113447810B
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- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention provides a device and a method for realizing the opening and closing operation detection and preventing misoperation of a ring main unit, which respectively detect an automatic control loop, an electric button loop and a mechanical handle loop through an automatic control opening and closing operation detection loop, an electric button opening and closing operation detection loop and a mechanical handle opening and closing operation detection loop to form a complete item record of the opening and closing operation mode of the ring main unit and provide corresponding signals for an automatic device to collect, so that the automatic device carries out different logic processing according to different operation modes, and in manual maintenance, protection logic is timely withdrawn, misoperation of the automatic device is prevented, the safety of operators is ensured, meanwhile, a complete historical item record of switch operation is formed, and accident tracing is convenient.
Description
Technical Field
The invention relates to the technical field of distribution automation, in particular to a device and a method for realizing switching-on and switching-off operation detection and misoperation prevention of a ring main unit.
Background
The domestic urban power distribution network is mainly a cable line, a three-section one-contact architecture form is adopted, and main equipment for realizing line section is a ring main unit. Therefore, the ring main unit becomes an important component of a domestic 10kV urban cable line, the operating mechanism of the ring main unit is mainly a spring-operated mechanism, and in order to ensure that the mechanism can be reliably switched on and off under various conditions, the switching-on and switching-off circuit of the general ring main unit is provided with three types, namely an automatic control circuit of a protection device, an electric button operating circuit and a mechanical handle operating circuit. At present, domestic equipment realizes operation detection on an automatic control loop, and part of the domestic equipment realizes detection on an electric button operation loop, but the domestic equipment does not realize detection on a mechanical handle operation loop. Therefore, after the ring main unit is put into operation, the states of the mechanical handle operation switch and the switch stealing trip cannot be detected and distinguished, and when the switch is operated by operation and maintenance personnel, the abnormal operation of the automation device logic is easily caused under the condition that the protection logic is not quitted, so that safety accidents are caused. Meanwhile, after the circuit trips, the events such as the action reason of the switching mechanism, manual operation, or the stealing trip of the switching mechanism cannot be recorded and distinguished, and the problem is not easy to analyze and search.
Disclosure of Invention
The invention aims to provide a device and a method for realizing switching-on and switching-off operation detection and preventing misoperation of a ring main unit, aims to solve the problems that in the prior art, switching-on and switching-off operations cannot be recorded and distinguished, and abnormal actions are easily caused, realizes prevention of misoperation of an automatic device, guarantees safety of operators, forms complete historical item records of switching operations, and facilitates accident tracing.
In order to achieve the technical purpose, the invention provides a device for realizing the switching-on and switching-off operation detection and misoperation prevention of a ring main unit, which comprises:
the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit, the mechanical handle switching-on and switching-off operation detection circuit and the control module are arranged in the control module;
the automatic control switching-on and switching-off operation detection circuit is connected to an action signal outlet contact of the automatic device and is used for collecting an action signal of the automatic device;
the electric button switching-on and switching-off operation detection loop is connected with an output contact of the multi-contact output button switch and is used for collecting an electric button action signal;
the mechanical handle opening and closing operation detection circuit is connected to a stroke displacement sensor mechanically associated with the mechanical opening and closing operation hole baffle and used for collecting mechanical opening and closing action signals;
the control module is connected with the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit and the mechanical handle switching-on and switching-off operation detection circuit, and is used for forming item records of switching-on and switching-off operation modes of the ring main unit by collected signals, and providing switching value signals according to different operation modes to be output to the automatic device for collection.
Preferably, the control module comprises a power supply unit, a signal acquisition unit, a signal output unit, a communication unit and a core control unit;
the power supply unit is used for carrying out voltage reduction, anti-interference and filtering processing on the working power supply and supplying power to each unit of the control module; the signal acquisition unit is used for acquiring the operation state signals of the operation detection circuits, conditioning filtering and debounce signals and transmitting the conditioned signals to the core control unit for operation processing; the signal output unit is used for the core control unit to perform logic operation processing according to various collected signals and output a null node signal for the automatic device to collect; the communication unit is used for realizing serial port communication and transmitting the historical data items stored by the control module out in a communication mode.
Preferably, the displacement sensor is installed on the back of the panel of the ring main unit mechanism chamber, when the baffle of the mechanical opening and closing operation hole of the switch mechanism is moved away for opening and closing operation, the contact of the stroke displacement sensor is closed, and a closing signal is output, and when the mechanical opening and closing operation of the switch mechanism is not performed, the contact of the stroke displacement sensor is opened, and a breaking signal is output.
Preferably, the control module is connected to each operation detection loop in the following specific manner:
the positive electrode + KM of the power supply is connected in series with an automatic operation signal contact ZK of the automatic control opening and closing operation detection circuit, and then is connected in series with a signal acquisition port DI1 of the access control module, and one end of the DI1 is connected with the negative electrode-KM of the power supply; the positive electrode + KM of the power supply is connected in series with an electric operation signal contact DK of an electric button switching-on and switching-off operation detection loop, and then is connected in series with a signal acquisition port DI2 of the access control module, and one end of the DI2 is connected with the negative electrode-KM of the power supply; the positive electrode + KM is connected in series with a travel sensor signal contact WK of a mechanical handle switching-closing operation detection loop, and then is connected in series with a signal acquisition port DI3 of the control module, and one end of the DI3 is connected with a power supply negative electrode-KM.
The invention also provides a method for realizing the switching-on and switching-off operation detection and misoperation prevention of the ring main unit by using the device, which comprises the following operations:
the control module collects an action signal of the automation device to detect the automatic control switching-on and switching-off operation;
the control module collects electric button action signals output by the multiple contacts to detect the opening and closing operations of the electric buttons;
the control module acquires an action signal of the stroke displacement sensor to detect the opening and closing operation of the mechanical handle;
the control module forms item records of the ring main unit switching-on and switching-off operation modes of the collected signals, provides switching value signals according to different operation modes and outputs the switching value signals to the automation device, and the automation device performs corresponding logic processing according to the switching value signals.
Preferably, the automation device locks the protection logic according to a switching value signal provided by the control module.
The effects provided in the summary of the invention are only the effects of the embodiments, not all of the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the automatic control circuit, the electric button switching operation detection circuit and the mechanical handle switching operation detection circuit are used for respectively detecting the automatic control circuit, the electric button switching operation detection circuit and the mechanical handle switching operation detection circuit, so that a complete item record of the switching operation mode of the ring main unit is formed, corresponding signals are provided for the automatic device to collect, the automatic device is enabled to perform different logic processing according to different operation modes, the protection logic is timely withdrawn during manual maintenance, the automatic device is prevented from being mistakenly operated, the safety of operators is guaranteed, meanwhile, a complete switch operation historical item record is formed, and accident tracing is facilitated.
Drawings
Fig. 1 is a schematic structural view of a device for detecting opening and closing operations and preventing misoperation of a ring main unit according to an embodiment of the present invention;
FIG. 2 is a wiring diagram of an operation detection loop provided in an embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting switching-on and switching-off operations of a ring main unit and preventing malfunction according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes in detail a device and a method for detecting opening and closing operations of a ring main unit and preventing malfunction according to embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention discloses a device for detecting opening and closing operations of a ring main unit and preventing malfunction, where the device includes:
the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit, the mechanical handle switching-on and switching-off operation detection circuit and the control module are arranged in the machine room;
the automatic control switching-on and switching-off operation detection circuit is connected to an action signal outlet contact of the automatic device and is used for collecting an action signal of the automatic device;
the electric button switching-on and switching-off operation detection loop is connected with an output contact of the multi-contact output button switch and is used for collecting an electric button action signal;
the mechanical handle opening and closing operation detection circuit is connected to a stroke displacement sensor mechanically associated with the mechanical opening and closing operation hole baffle and used for collecting mechanical opening and closing action signals;
the control module is connected with the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit and the mechanical handle switching-on and switching-off operation detection circuit, and is used for forming item records of switching-on and switching-off operation modes of the ring main unit by collected signals, and providing switching value signals according to different operation modes to be output to the automatic device for collection.
The embodiment of the invention is applied to the detection of the action state of the operation loop of the switch mechanism of the ring main unit, sends the switch operation condition signal to indicate to the automation device for collection, participates in the operation of the action logic of the automation device, ensures the operation safety of field operation and maintenance personnel, forms a complete item record of the switching-on and switching-off operation mode of the ring main unit, and transmits the item record to the automation device for operation item analysis in a communication mode.
The automatic control opening and closing operation detection loop consists of a power supply and an action signal outlet contact ZK of an automation device.
The electric button switching-on and switching-off operation detection loop consists of a power supply and a group of electric button action signals DK contacts in a button switch DD output by multiple contacts.
And the mechanical handle switching-on and switching-off operation detection loop consists of a power supply and a stroke displacement sensor action signal contact WK. The stroke displacement sensor WY is designed and installed on the back face of the ring main unit mechanism chamber panel, the sensor is mechanically associated with a baffle of a mechanical opening and closing operation hole of the switch mechanism, when the baffle of the mechanical opening and closing operation hole of the switch mechanism is moved away to perform opening and closing operation, a contact of the stroke displacement sensor WY is closed, a closed signal WK is output to be collected by the control unit, when the mechanical opening and closing operation of the switch mechanism is not performed, the contact of the stroke displacement sensor is disconnected, and a disconnected signal WK is output to be collected by the control module.
The control module comprises a power supply unit, a signal acquisition unit, a signal output unit, a communication unit and a core control unit.
The power supply unit is used for carrying out voltage reduction, anti-interference, filtering and other processing on the working power supply and supplying power to each unit of the control module; the signal acquisition unit is used for acquiring operation state signals of each operation detection loop, conditioning signals such as filtering and debouncing and transmitting the conditioned signals to the core control unit for operation processing; the signal output unit is used for carrying out logical operation processing on the core control unit according to various collected signals and outputting a null node signal for the automatic device to collect; the communication unit is used for realizing the serial port communication function and transmitting the historical data items stored by the control module out in a communication mode.
The connection mode of each operation detection loop and the control module in the ring main unit is shown in fig. 2, the positive electrode + KM of the power supply is connected in series with the automatic operation signal contact ZK of the automatic control opening and closing operation detection loop, and then is connected in series with the signal acquisition port DI1 of the control module, and one end of the DI1 is connected with the negative electrode-KM of the power supply; the positive electrode + KM of the power supply is connected in series with an electric operation signal contact DK of an electric button switching-on and switching-off operation detection circuit, and then is connected in series with a signal acquisition port DI2 of the access control module, and one end of the DI2 is connected with the negative electrode-KM of the power supply; the positive electrode + KM is connected in series with a stroke sensor signal contact WK of a mechanical handle switching-on and switching-off operation detection circuit, and then is connected in series with a signal acquisition port DI3 of the control module, and one end of the DI3 is connected with a power supply negative electrode-KM.
According to the embodiment of the invention, the automatic control loop, the electric button switching-on and switching-off operation detection loop and the mechanical handle switching-on and switching-off operation detection loop are respectively detected through the automatic control switching-on and switching-off operation detection loop, the electric button switching-on and switching-off operation detection loop and the mechanical handle switching-on and switching-off operation detection loop, and corresponding signals are provided for the automatic device to collect, so that the automatic device can carry out different logic processing according to different operation modes, and during manual maintenance, the protection logic is timely withdrawn, the automatic device is prevented from misoperation, the safety of operators is ensured, meanwhile, the historical event records of switching operation with complete stroke are recorded, and the accident tracing is facilitated.
As shown in fig. 3, the embodiment of the present invention further discloses a method for detecting the switching-on/off operation of the ring main unit and preventing malfunction by using the apparatus, where the method includes the following operations:
the control module collects an action signal of the automation device to detect the automatic control switching-on and switching-off operation;
the control module collects electric button action signals output by the multiple contacts to detect the opening and closing operations of the electric buttons;
the control module collects action signals of the stroke displacement sensor so as to detect the opening and closing operations of the mechanical handle;
the control module forms item records of the ring main unit switching-on and switching-off operation modes of the collected signals, provides switching value signals according to different operation modes and outputs the switching value signals to the automation device, and the automation device performs corresponding logic processing according to the switching value signals.
The embodiment of the invention can effectively detect and distinguish three operation modes of the automatic control loop, the electric button operation loop and the mechanical handle operation loop, and provides corresponding signals for the automatic device to collect, so that the automatic device can carry out different logic processing according to different operation modes.
Automatically controlling the switching-on and switching-off operation detection, collecting the information of an action signal outlet contact of the automatic device, and transmitting the action information of the contact to a control module for processing;
the method comprises the following steps of (1) electric button switching-on and switching-off operation detection, namely replacing a traditional common button switch with a multi-contact output button switch, wherein one group of output contacts of the button switch is used for switching on and switching off an operation switch mechanism, and the other group of output contacts of the button switch is used for providing electric button action signals for a control module to collect;
the mechanical handle opening and closing operation detection is characterized in that a stroke displacement sensor is designed and installed on a ring main unit mechanism chamber panel, the sensor is mechanically associated with a baffle of a mechanical opening and closing operation hole of a switch mechanism, when the baffle of the mechanical opening and closing operation hole of the switch mechanism is moved away to perform opening and closing operation, a contact of the stroke displacement sensor is closed, a closing signal is output to a control module for collection, and when the mechanical opening and closing operation of the switch mechanism is not performed, the contact of the stroke displacement sensor is disconnected, and a disconnection signal is output to the control module for collection.
The control module is used as a core to realize detection and collection of state signals of different operation detection loops, the collected signals are subjected to filtering, shaking removal and other processing to form item records of switching-on and switching-off operation modes of the ring main unit, switching value signals are provided according to different operation modes and output to the automatic device for collection so that the automatic device can perform corresponding logic processing, the item records of the switching-on and switching-off operation modes of the ring main unit are transmitted to the automatic device for operation item analysis in a communication mode, and particularly when the control module detects the switching-on and switching-off operation of an electric button or a mechanical handle, the automatic device determines that equipment is in a manual debugging and maintenance state according to the signals provided by the control module, locks protection logic and avoids misoperation and safety accidents.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a realize that looped netowrk cabinet divide-shut brake operation detects and prevent device of maloperation which characterized in that, the device includes:
the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit, the mechanical handle switching-on and switching-off operation detection circuit and the control module are arranged in the control module;
the automatic control switching-on and switching-off operation detection circuit is connected to an action signal outlet contact of the automatic device and is used for collecting an action signal of the automatic device;
the electric button switching-on and switching-off operation detection loop is connected with an output contact of the multi-contact output button switch and is used for collecting an electric button action signal;
the mechanical handle opening and closing operation detection circuit is connected to a stroke displacement sensor mechanically associated with the mechanical opening and closing operation hole baffle and used for collecting mechanical opening and closing actions; the displacement sensor is arranged on the back of a panel of the ring main unit mechanism chamber, when a baffle of a mechanical opening and closing operation hole of the switch mechanism moves away to perform opening and closing operation, a contact of the stroke displacement sensor is closed and outputs a closing signal, and when the mechanical opening and closing operation of the switch mechanism is not performed, the contact of the stroke displacement sensor is opened and outputs an opening signal;
the control module is connected with the automatic control switching-on and switching-off operation detection circuit, the electric button switching-on and switching-off operation detection circuit and the mechanical handle switching-on and switching-off operation detection circuit, and is used for forming item records of switching-on and switching-off operation modes of the ring main unit by collected signals, and providing switching value signals according to different operation modes to be output to the automatic device for collection.
2. The device for realizing switching-on and switching-off operation detection and misoperation prevention of the ring main unit according to claim 1, wherein the control module comprises a power supply unit, a signal acquisition unit, a signal output unit, a communication unit and a core control unit;
the power supply unit is used for carrying out voltage reduction, anti-interference and filtering processing on the working power supply and supplying power to each unit of the control module; the signal acquisition unit is used for acquiring operation state signals of each operation detection loop, conditioning filtering and debounce signals and transmitting the conditioned signals to the core control unit for operation processing; the signal output unit is used for the core control unit to perform logical operation processing according to the collected various signals and output a null node signal for the automatic device to collect; the communication unit is used for realizing serial port communication and transmitting the historical data items stored by the control module out in a communication mode.
3. The device for realizing switching-on and switching-off operation detection and misoperation prevention of the ring main unit according to claim 1, wherein the specific connection mode of the control module and each operation detection loop is as follows:
the positive electrode + KM of the power supply is connected in series with an automatic operation signal contact ZK of the automatic control opening and closing operation detection circuit, and then is connected in series with a signal acquisition port DI1 of the access control module, and one end of the DI1 is connected with the negative electrode-KM of the power supply; the positive electrode + KM of the power supply is connected in series with an electric operation signal contact DK of an electric button switching-on and switching-off operation detection loop, and then is connected in series with a signal acquisition port DI2 of the access control module, and one end of the DI2 is connected with the negative electrode-KM of the power supply; the positive electrode + KM is connected in series with a stroke sensor signal contact WK of a mechanical handle switching-on and switching-off operation detection circuit, and then is connected in series with a signal acquisition port DI3 of the control module, and one end of the DI3 is connected with a power supply negative electrode-KM.
4. A method for detecting the switching-on and switching-off operations of a ring main unit and preventing misoperation by using the device of any one of claims 1 to 3, wherein the method comprises the following operations:
the control module acquires an action signal of the automation device to detect the operation of automatically controlling the opening and closing;
the control module collects electric button action signals output by the multiple contacts to detect the opening and closing operations of the electric buttons;
the control module acquires an action signal of the stroke displacement sensor to detect the opening and closing operation of the mechanical handle;
the control module forms item records of the ring main unit switching-on and switching-off operation modes of the collected signals, provides switching value signals according to different operation modes and outputs the switching value signals to the automation device, and the automation device performs corresponding logic processing according to the switching value signals.
5. The method for detecting the opening and closing operations of the ring main unit and preventing the malfunction according to claim 4, wherein the automation device locks the protection logic according to the switching value signal provided by the control module.
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