CN112186509A - Ring main unit - Google Patents
Ring main unit Download PDFInfo
- Publication number
- CN112186509A CN112186509A CN202011150192.6A CN202011150192A CN112186509A CN 112186509 A CN112186509 A CN 112186509A CN 202011150192 A CN202011150192 A CN 202011150192A CN 112186509 A CN112186509 A CN 112186509A
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- China
- Prior art keywords
- reclosing
- circuit breaker
- control
- reclosing circuit
- breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a ring main unit, comprising: the master control reclosing circuit breaker and each slave control reclosing circuit breaker are connected to different power lines, the master control reclosing circuit breaker is connected with an external control terminal through a dry contact circuit, and is connected with each slave control reclosing circuit breaker; when the master control reclosing circuit breaker or at least one slave control reclosing circuit breaker has a fault, the master control reclosing circuit breaker is conducted through a control dry contact circuit, an alarm signal is sent to an external control terminal, and the external control terminal sends the alarm signal so as to inform maintenance personnel to maintain, so that the on-line monitoring of the running state of the ring main unit is realized, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a ring main unit.
Background
The looped netowrk cabinet is that a set of high tension switchgear adorns at steel sheet metal cabinet internal or make the electrical equipment of assembling compartment formula looped netowrk power supply unit, its core part adopts load switch and fuse, have simple structure, small, the low price, can improve advantages such as power supply parameter and performance and power supply safety, and must set up power failure protection device in the looped netowrk cabinet, with effectively preventing the person to electrocute and fire incident, the circuit breaker is as the electronic components that circuit failure protection device is essential, wide application in each field of electronic circuit. Since the circuit fault protection device itself may have a fault, for example, when the service life of the internal components is over or the circuit breaker is open, the circuit fault protection function is lost, in this case, if the device is continuously used, a person may get an electric shock or a fire accident. Therefore, whether the circuit breaker in the ring main unit has a fault needs to be detected in real time, but the existing detection circuit needs to provide a detection signal manually and cannot be diagnosed automatically, so that the current operation state of the circuit breaker cannot be reflected in time.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the self-checking circuit of the circuit breaker in the ring main unit in the prior art cannot reflect the current operation state of the circuit breaker in time, so that the ring main unit is provided.
In order to achieve the purpose, the invention provides the following technical scheme:
an embodiment of the present invention provides a ring main unit, including: the main control reclosing circuit breaker and each slave control reclosing circuit breaker are connected to different power lines, and the main control reclosing circuit breaker is connected with an external control terminal through the main contact circuit and is connected with each slave control reclosing circuit breaker; when the master control reclosing circuit breaker fails or is powered off or at least one slave control reclosing circuit breaker fails or is powered off, the master control reclosing circuit breaker is conducted through a control dry contact circuit, an alarm signal is sent to an external control terminal, and the external control terminal sends the alarm signal.
In one embodiment, a dry contact circuit includes: the control circuit is respectively connected with the main control reclosing circuit breaker and the relay circuit and is used for controlling the relay circuit to be conducted according to the received control signal; and the relay circuit is connected with the external control terminal and used for sending out an alarm signal when the relay circuit is conducted.
In one embodiment, the control circuit includes: the circuit comprises a first diode, a second diode, a first resistor, a second resistor, a third resistor, a first switch tube and a second switch tube, wherein the cathodes of the first diode and the second diode are connected with the control end of the first switch tube through the first resistor, and the first resistor is connected with the grounding end through the second resistor; anodes of the first diode and the second diode are connected with the master control reclosing circuit breaker; the first end of the first switch tube is connected with the control end of the second switch tube and is connected with an external power supply through a third resistor, and the second end of the first switch tube is connected with the grounding end; the first end of the second switch tube is connected with the relay circuit, and the second end of the second switch tube is connected with the grounding end.
In one embodiment, a relay circuit includes: and the first end of the relay is connected with an external power supply through the fourth resistor, the second end of the relay is connected with the first end of the second switching tube, and the third end and the fourth end of the relay are connected with external control terminals.
In an embodiment, each reclosure breaker is connected with one communication module, each communication module is used for realizing data transmission between the master control reclosure breaker and each slave control reclosure breaker, and the communication modules adopt bluetooth communication.
In one embodiment, a master reclosing circuit breaker includes: the polling module is used for acquiring the on-off state of the polling module, acquiring the on-off state of all slave control reclosing circuit breakers by adopting a polling mode with first preset time as a time interval, judging whether the polling module is in an opening state or not or whether at least one slave control reclosing circuit breaker is in an opening state or not, and transmitting an alarm signal to an external control terminal by controlling the conduction of a main contact circuit when the polling module is in the opening state or at least one slave control reclosing circuit breaker is in the opening state, and the external control terminal transmits the alarm signal.
In an embodiment, the polling module is further configured to acquire the on-off states of all slave control reclosure breakers by using a polling method with a first preset time as a time interval, and determine whether the on-off states of all slave control reclosure breakers are successfully acquired, when the on-off state of at least one slave control reclosure breaker is not successfully acquired, determine that a communication module of the slave control reclosure breaker has a fault, and transmit an alarm signal to an external control terminal by controlling the connection of a dry contact circuit, and the external control terminal transmits the alarm signal.
In an embodiment, each reclosure breaker shell is provided with its own Mac address and its corresponding two-dimensional code, and an operation and maintenance person establishes communication connection between the master control reclosure breaker and the slave control reclosure breaker in a mode that the operation and maintenance person scans the two-dimensional codes through the control terminal.
In one embodiment, each reclosing circuit breaker is provided with a toggle switch, and an operation and maintenance person locks or unlocks the automatic reclosing function of the reclosing circuit breaker by controlling the state of the toggle switch.
In one embodiment, a reclosing circuit breaker includes: the control module is used for switching off the reclosing circuit breaker when a power line has a fault, switching on the reclosing circuit breaker after second preset time, switching off the reclosing circuit breaker again after judging that the reclosing circuit breaker is in a switching-on state, self-locking and no switching on; recording the switching-on times of the reclosing circuit breaker in the third preset time, judging whether the recorded reclosing times exceed the preset reclosing times or not in the third preset time, when the recorded reclosing times exceed the preset reclosing times, self-locking and no switching-on, and when the recorded reclosing times do not exceed the preset reclosing times, resetting the recorded reclosing times by the control module.
The technical scheme of the invention has the following advantages:
1. according to the ring main unit provided by the invention, the master control reclosing circuit breaker is connected with the control terminal through the dry contact circuit, the master control reclosing circuit breaker adopts a polling mode, the state of each slave control reclosing circuit breaker is inquired by taking first preset time as a time interval, when the master control reclosing circuit breaker fails or at least one slave control reclosing circuit breaker fails, the master control reclosing circuit breaker sends an alarm signal to the external control terminal through the dry contact circuit, and the external control terminal sends the alarm signal so as to inform maintenance personnel to maintain, so that the online monitoring of the running state of the ring main unit is realized, and the maintenance cost is reduced.
2. According to the ring main unit provided by the invention, the reclosing function of the reclosing circuit breaker is locked and unlocked by setting the toggle switch, the problem that the circuit breaker in the ring main unit needs to be manually closed after tripping due to accidental faults is solved, and manpower and material resources can be saved; the built-in control module of every reclosing circuit breaker carries out fault diagnosis to reclosing circuit breaker, when it broke down, starts the auto-lock mechanism to prevent to cause the phenomenon of power line damage because of the circuit breaker trouble.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a composition diagram of a specific example of a ring main unit according to an embodiment of the present invention;
fig. 2 is a composition diagram of another specific example of the ring main unit according to the embodiment of the present invention;
fig. 3 is a specific circuit structure of a dry contact circuit according to an embodiment of the present invention;
fig. 4 is a composition diagram of another specific example of the ring main unit according to the embodiment of the present invention;
fig. 5 is a composition diagram of another specific example of the ring main unit according to the embodiment of the present invention;
fig. 6 is a composition diagram of another specific example of the ring main unit according to the embodiment of the present invention;
fig. 7 is a composition diagram of another specific example of the ring main unit according to the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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 the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
The embodiment of the invention provides a ring main unit, which is applied to the occasions needing to monitor a reclosing circuit breaker in the ring main unit in real time, and fig. 1 is a reclosing circuit breaker scheme based on the application scene of the ring main unit, namely, the embodiment of the invention only carries out fault detection on the ring main unit provided with the reclosing circuit breaker, so that the ring main unit of the embodiment of the invention not only comprises the following components: the main control reclosing circuit comprises a dry contact circuit 1, a main control reclosing circuit breaker 2 and a plurality of auxiliary control reclosing circuit breakers 3, and further comprises other devices, and the description is omitted.
The master control reclosing circuit breaker 2 and each slave control reclosing circuit breaker 3 in the embodiment of the invention are connected to different power lines, as shown in fig. 1, the master control reclosing circuit breaker 2 is connected with an external control terminal through a dry contact circuit 1, and is connected with each slave control reclosing circuit breaker 3.
In the power system, a ring network is an annular power distribution network, namely a power supply main line forms a closed ring, a power supply supplies power to the annular main line, and the power is distributed outwards from the main line all the way through a high-voltage switch, and in order to monitor whether a power line has a fault or not and meet the requirement of convenience in maintenance, in the embodiment of the invention, a plurality of reclosing circuit breakers are arranged in a ring network cabinet, one master control reclosing circuit breaker 2 is selected from a plurality of reclosing circuit breakers, the unselected reclosing circuit breaker is a slave control reclosing circuit breaker 3, each slave control reclosing circuit breaker 3 is connected with the master control reclosing circuit breaker 2, and the master control reclosing circuit breaker 2 is connected with an external control terminal through a dry contact circuit 1.
In the embodiment of the invention, the master control reclosing circuit breaker 2 sequentially and circularly queries the running state (the opening state or the closing state) of each slave control reclosing circuit breaker 3 in a polling mode by taking first preset time as a time interval, when the master control reclosing circuit breaker 2 or at least one slave control reclosing circuit breaker 3 has a fault (the master control reclosing circuit breaker 2 is in the opening state or at least one slave control reclosing circuit breaker 3 is in the opening state), the master control reclosing circuit breaker 2 is conducted through the control main contact circuit 1, an alarm signal is sent to an external control terminal, and the external control terminal sends the alarm signal.
In addition, in the embodiment of the invention, when the master control reclosing circuit breaker or at least one slave control reclosing circuit is powered off, the dry contact circuit 1 is conducted, and the external control terminal also sends out an alarm signal.
The control terminal of the embodiment of the invention can be composed of an intelligent terminal with a built-in alarm module, when the intelligent terminal is connected with the main control reclosing circuit breaker, the alarm module alarms, the intelligent terminal can be connected with the communication terminal, and the communication terminal can enable operation and maintenance personnel to carry out operation and maintenance management on the ring main unit in a mobile phone APP mode and the like.
According to the ring main unit provided by the embodiment of the invention, the master control reclosing circuit breaker is connected with the control terminal through the dry contact circuit, the master control reclosing circuit breaker adopts a polling mode, the state of each slave control reclosing circuit breaker is inquired by taking first preset time as a time interval, when the master control reclosing circuit breaker fails or at least one slave control reclosing circuit breaker fails, the master control reclosing circuit breaker sends an alarm signal to the external control terminal through the dry contact circuit, and the external control terminal sends the alarm signal so as to inform maintenance personnel of maintenance, so that the online monitoring of the running state of the ring main unit is realized, and the maintenance cost is reduced.
In one embodiment, as shown in fig. 2, the dry contact circuit 1 includes: a control circuit 11 and a relay circuit 12.
As shown in fig. 2, the control circuit 11 according to the embodiment of the present invention is respectively connected to the master reclosing circuit breaker and relay circuit 12, and is configured to control the relay circuit 12 to be turned on according to the received control signal; and the relay circuit 12 is connected with the external control terminal and used for sending out an alarm signal when the relay circuit is conducted.
When the master reclosing circuit breaker 2 and the slave reclosing circuit breaker 3 are not in the open state (or the master reclosing circuit breaker 2 and the slave reclosing circuit breaker 3 are not powered off), the control circuit 11 drives the relay circuit 12 to enable the main reclosing circuit 1 to be in the off state (namely the relay circuit is in the off state), when the master reclosing circuit breaker 2 or at least one slave reclosing circuit breaker 3 is in the open state, the master reclosing circuit breaker 2 outputs a control signal to the control circuit 11 to control the relay circuit 12 to be switched on, then the master reclosing circuit 2 is connected with an external control terminal, and the external control terminal sends an alarm signal.
In one embodiment, the control circuit 11 shown in fig. 3 includes: the circuit comprises a first diode D5, a second diode D6, a first resistor R12, a second resistor R13, a third resistor R11, a first switch tube Q2 and a second switch tube Q1.
As shown in fig. 3, the cathodes of the first diode D5 and the second diode D6 are both connected to the control terminal of the first switch Q2 through a first resistor R12, and the first resistor R12 is connected to the ground terminal through a second resistor R13; anodes of the first diode D5 and the second diode D6 are connected with the master reclosing circuit breaker 2; a first end of the first switch tube Q2 is connected with a control end of the second switch tube Q1, and is connected with an external power supply through a third resistor R11, and a second end of the first switch tube Q2 is connected with a ground end; the second switching tube Q1 has a first end connected to the relay circuit 12 and a second end connected to the ground.
When the master control reclosing circuit breaker 2 is in an opening state, the master control reclosing circuit breaker 2 sends a control signal to the control circuit 11 through the MCU-6 end shown in the figure 3, at the moment, the first switch tube Q2 is conducted, the second switch tube Q1 is turned off, the relay circuit is powered off, and the dry contact circuit is conducted; when at least one slave control reclosing circuit breaker 3 is in an opening or power-off state, the master control reclosing circuit breaker 2 sends a control signal to the control circuit 11 through a BLE-6 end in fig. 3, at the moment, the first switch tube Q2 is switched on, the second switch tube Q1 is switched off, the relay circuit is powered off, and the dry contact circuit is switched on.
When the main control reclosing circuit breaker 2 is in a breaking state, namely the branch where the circuit breaker is located loses power, the switching tubes Q2 and Q1 are both turned off, the relay circuit loses power, and the dry contact circuit is turned on.
In one embodiment, the relay circuit 12 shown in fig. 3 includes: fourth resistor R1 and relay U2.
As shown in fig. 3, a first end of the relay U2 is connected to an external power source through a fourth resistor R1, a second end of the relay U2 is connected to a first end of a second switch Q1, and a third end and a fourth end of the relay U2 are both connected to an external control terminal.
The terminal P4 of the relay circuit 12 of the embodiment of the invention is connected with an external control terminal, when a second switch tube Q1 in the control circuit 11 is turned off, the relay U2 loses power, a dry contact circuit is conducted, the master control reclosing circuit breaker 2 is connected with the external control terminal, and the external control terminal sends out an alarm signal.
In an embodiment, as shown in fig. 4, in the embodiment of the present invention, the master reclosing circuit breaker 2 and all slave reclosing circuit breakers 3 are connected to corresponding communication modules 4, and the communication modules 4 may adopt bluetooth communication. The master control reclosing circuit breaker 2 communicates with other slave control reclosing circuit breakers 3 through a communication module 4 connected with the master control reclosing circuit breaker 2 and a communication module 4 connected with other slave control reclosing circuit breakers 3, a polling mode is adopted, whether each slave control reclosing circuit breaker 3 is in a switching-off state or not is sequentially inquired by taking first preset time as a time interval, and when the master control reclosing circuit breaker 2 or at least one slave control reclosing circuit breaker 3 is in the switching-off state, a control signal is sent to the dry contact circuit 1.
In an embodiment, as shown in fig. 5, the master reclosing breaker 2 includes: the polling module 21 is configured to acquire on-off states of the slave control reclosing circuit breakers 3, and acquire the on-off states of all the slave control reclosing circuit breakers 3 in a polling manner by taking a first preset time as a time interval, and determine whether or not the slave control reclosing circuit breakers 3 are in an opening state or at least one of the slave control reclosing circuit breakers 3 is in an opening state, when the slave control reclosing circuit breakers 3 are in the opening state or at least one of the slave control reclosing circuit breakers 3 is in the opening state, the alarm signal is sent to an external control terminal by controlling the connection point circuit 1 to be conducted, and the external control terminal sends the alarm signal.
The polling module 21 of the master control reclosing circuit breaker 2 in the embodiment of the invention sequentially and circularly inquires whether other slave control reclosing circuit breakers 3 are in an opening state or not by taking first preset time as a time interval, when the slave control reclosing circuit breakers are in the opening state, an alarm signal is sent to an external control terminal by controlling the conduction of the main contact point circuit 1, and the external control terminal sends the alarm signal. In addition, when the master control reclosing circuit breaker 2 is in the opening state, the external control terminal also sends out an alarm signal.
The polling module 21 of the embodiment of the invention is further configured to acquire the on-off states of all the slave control reclosure breakers 3 in a polling manner by taking the first preset time as a time interval, judge whether the on-off states of all the slave control reclosure breakers 3 are successfully acquired, judge that the communication module 4 of at least one slave control reclosure breaker 3 has a fault when the on-off state of the slave control reclosure breaker 3 is not successfully acquired, conduct through the control dry contact circuit 1, send an alarm signal to an external control terminal, and send the alarm signal to the external control terminal.
In the embodiment of the invention, when the master reclosing circuit breaker 2 communicates with other slave reclosing circuit breakers 3 through the communication module 4, when the polling module 21 inquires the on-off state of the slave reclosing circuit breaker 3, if the polling module 21 does not successfully acquire the on-off state of the slave reclosing circuit breaker 3, the on-off state is conducted through the control main contact circuit 1, an alarm signal is sent to an external control terminal, and the external control terminal sends the alarm signal.
In an embodiment, as shown in fig. 6, the reclosing circuit breaker includes: the control module 22 is used for switching off the reclosing circuit breaker when a fault occurs in the power line, switching on the reclosing circuit breaker after second preset time, and switching off the reclosing circuit breaker again after judging that the reclosing circuit breaker is in a switching-on state, self-locking is carried out, and switching on is not carried out; recording the switching-on times of the reclosing circuit breaker within a third preset time, and judging whether the recorded reclosing times exceed the preset reclosing times within the third preset time, if so, self-locking and no switching-on is carried out, and if not, the control module 22 resets the recorded reclosing times.
Each reclosing circuit breaker (including the master reclosing circuit breaker 2 and the slave reclosing circuit breaker 3) in the embodiment of the invention is provided with the control module 22, and the circuit breakers in the embodiment of the invention are all the reclosing circuit breakers, so that when a power line connected with the circuit breaker fails, the reclosing circuit breaker is switched off and is switched on after second preset time, and if the reclosing circuit breaker is switched off again after reclosing, the control module 22 of the reclosing circuit breaker is self-locked and is not switched on any more.
In addition, the control module 22 is further configured to record the number of times of reclosing the circuit breaker in a third preset time, and when the number of times of reclosing recorded by the control module 22 exceeds the preset number of times of reclosing in the third preset time, the circuit breaker is self-locked and is not closed again, and when the number of times of reclosing is not exceeded, the control module 22 resets the recorded number of times of reclosing.
It should be noted that the control method, the query method, the determination method, and the like related to the control module 22 and the polling module 21 are mature control methods, query methods, and determination methods in the prior art, and are not described herein again.
In a specific embodiment, each Mac address and the corresponding two-dimensional code are printed on the shell of each reclosing circuit breaker, and when the master control reclosing circuit breaker 2 is not in communication connection with other slave control reclosing circuit breakers 3, an operation and maintenance person scans the two-dimensional codes through a control terminal to establish communication connection between the master control reclosing circuit breaker 2 and the slave control reclosing circuit breakers 3.
In an embodiment, as shown in fig. 7, each reclosure breaker is provided with a toggle switch 5, and an operation and maintenance person locks or unlocks an automatic reclosure function of the reclosure breaker by controlling a state of the toggle switch 5.
In the embodiment of the invention, each reclosing circuit breaker is provided with a toggle switch 5, the toggle switch controls whether the reclosing circuit breaker has a reclosing function, and when the toggle switch 5 is switched to a reclosing state, the reclosing circuit breaker has the reclosing function; if the toggle switch 5 is toggled to a non-reclosing state, the reclosing circuit breaker closes the reclosing function, if the reclosing circuit breaker is automatically locked by the control module 22 in the reclosing circuit breaker, the toggle switch 5 can be toggled to the reclosing state from the non-reclosing state, the reclosing circuit breaker is unlocked, and the reclosing circuit breaker has the reclosing function.
According to the ring main unit, the master control reclosing circuit breaker is connected with the control terminal through the dry contact circuit, the master control reclosing circuit breaker adopts a polling mode, the state of each slave control reclosing circuit breaker is inquired by taking first preset time as a time interval, when the master control reclosing circuit breaker fails or at least one slave control reclosing circuit breaker fails, the master control reclosing circuit breaker sends an alarm signal to the external control terminal through the dry contact circuit, and the external control terminal sends the alarm signal so as to inform maintenance personnel of maintenance, so that the online monitoring of the running state of the ring main unit is realized, and the maintenance cost is reduced; the reclosing function of the reclosing circuit breaker is locked and unlocked by arranging the toggle switch, the problem that manual closing is needed after the circuit breaker in the ring main unit trips due to accidental faults is solved, and manpower and material resources can be saved; the built-in control module of every reclosing circuit breaker carries out fault diagnosis to reclosing circuit breaker, when it broke down, starts the auto-lock mechanism to prevent to cause the phenomenon of power line damage because of the circuit breaker trouble.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A ring main unit, comprising: a dry contact circuit, a master reclosing circuit breaker and a plurality of slave reclosing circuit breakers, wherein,
the master control reclosing circuit breaker and each slave control reclosing circuit breaker are connected to different power lines, the master control reclosing circuit breaker is connected with an external control terminal through a dry contact circuit, and is connected with each slave control reclosing circuit breaker;
when the master control reclosing circuit breaker fails or is powered off or at least one slave control reclosing circuit breaker fails or is powered off, the master control reclosing circuit breaker is conducted through a control dry contact circuit, an alarm signal is sent to an external control terminal, and the external control terminal sends the alarm signal.
2. The ring main unit as claimed in claim 1, wherein the dry contact circuit comprises: a control circuit and a relay circuit, wherein,
the control circuit is respectively connected with the master control reclosing circuit breaker and the relay circuit and is used for controlling the relay circuit to be conducted according to the received control signal;
and the relay circuit is connected with the external control terminal and used for sending out an alarm signal when the relay circuit is conducted.
3. The ring main unit as claimed in claim 2, wherein the control circuit comprises: a first diode, a second diode, a first resistor, a second resistor, a third resistor, a first switch tube and a second switch tube,
cathodes of the first diode and the second diode are connected with a control end of the first switch tube through a first resistor, and the first resistor is connected with a grounding end through a second resistor; anodes of the first diode and the second diode are connected with the master control reclosing circuit breaker;
the first end of the first switch tube is connected with the control end of the second switch tube and is connected with an external power supply through a third resistor, and the second end of the first switch tube is connected with the grounding end;
the first end of the second switch tube is connected with the relay circuit, and the second end of the second switch tube is connected with the grounding end.
4. The ring main unit as claimed in claim 3, wherein the relay circuit comprises: a fourth resistor and a relay, wherein,
the first end of the relay is connected with an external power supply through a fourth resistor, the second end of the relay is connected with the first end of the second switch tube, and the third end and the fourth end of the relay are connected with an external control terminal.
5. The ring main unit as claimed in claim 4, wherein each reclosure breaker is connected to a communication module, each communication module is used for data transmission between the master reclosure breaker and each slave reclosure breaker, and the communication modules communicate with each other via Bluetooth.
6. The ring main unit as claimed in claim 1, wherein the master reclosing circuit breaker comprises:
the polling module is used for acquiring the on-off state of the polling module, acquiring the on-off state of all slave control reclosing circuit breakers by adopting a polling mode with first preset time as a time interval, judging whether the polling module is in an opening state or not or whether at least one slave control reclosing circuit breaker is in an opening state or not, and transmitting an alarm signal to an external control terminal by controlling the conduction of a main contact circuit when the polling module is in the opening state or at least one slave control reclosing circuit breaker is in the opening state, and the external control terminal transmits the alarm signal.
7. The ring main unit according to claim 6,
the polling module is further used for acquiring the on-off states of all the slave control reclosing circuit breakers in a polling mode by taking first preset time as a time interval, judging whether the on-off states of all the slave control reclosing circuit breakers are acquired successfully or not, judging that a communication module of each slave control reclosing circuit breaker has a fault when the on-off state of at least one slave control reclosing circuit breaker is not acquired successfully, switching on the circuit through a control dry contact, sending an alarm signal to an external control terminal, and sending the alarm signal by the external control terminal.
8. The ring main unit as claimed in claim 5, wherein each reclosure breaker shell is provided with its own Mac address and its corresponding two-dimensional code, and the operation and maintenance personnel establishes communication connection between the master control reclosure breaker and the slave control reclosure breaker by scanning the two-dimensional code through the control terminal.
9. The ring main unit as claimed in claim 4, wherein each reclosure breaker is provided with a toggle switch, and an operation and maintenance person locks or unlocks an automatic reclosure function of the reclosure breaker by controlling a state of the toggle switch.
10. The ring main unit as claimed in claim 4, wherein the reclosing circuit breaker comprises:
the control module is used for switching off the reclosing circuit breaker when a power line has a fault, switching on the reclosing circuit breaker after second preset time, switching off the reclosing circuit breaker again after judging that the reclosing circuit breaker is in a switching-on state, self-locking and no switching on; recording the switching-on times of the reclosing circuit breaker in the third preset time, judging whether the recorded reclosing times exceed the preset reclosing times or not in the third preset time, when the recorded reclosing times exceed the preset reclosing times, self-locking and no switching-on, and when the recorded reclosing times do not exceed the preset reclosing times, resetting the recorded reclosing times by the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150192.6A CN112186509A (en) | 2020-10-23 | 2020-10-23 | Ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150192.6A CN112186509A (en) | 2020-10-23 | 2020-10-23 | Ring main unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112186509A true CN112186509A (en) | 2021-01-05 |
Family
ID=73923643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011150192.6A Pending CN112186509A (en) | 2020-10-23 | 2020-10-23 | Ring main unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112186509A (en) |
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2020
- 2020-10-23 CN CN202011150192.6A patent/CN112186509A/en active Pending
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