CN116718948A - Control loop broken line detection device and detection method of power distribution equipment - Google Patents
Control loop broken line detection device and detection method of power distribution equipment Download PDFInfo
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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Abstract
The application discloses a control loop disconnection detection device of power distribution equipment and a detection method thereof. The circuit broken line of the upstream secondary equipment is detected in real time through the upstream opening and closing broken line detection unit, and the circuit broken line of the downstream primary equipment is detected in real time through the downstream opening and closing broken line detection unit, so that the broken line fault point can be positioned accurately rapidly, and the method can be widely applied to the technical field of electric data detection.
Description
Technical Field
The application relates to the technical field of electrical data detection, in particular to a control loop disconnection detection device and a detection method of power distribution equipment.
Background
At present, the running environment of a distribution line is complex and is easily influenced by the outside, and the disconnection fault of a control loop occurs, so that the detection of the disconnection fault of the distribution line is particularly important, and the running level of the whole power grid is directly influenced.
The existing control loop disconnection detection technology mainly monitors the complete condition of a loop through a jump relay and a close relay, judges whether a position return signal is normal or not through judging a position return signal when the control is started, but only detects the disconnection condition of a primary equipment loop of the power distribution equipment, cannot detect the disconnection condition of a secondary protection equipment loop of the power distribution equipment, cannot distinguish upstream and downstream faults and accurately positions disconnection fault points when the loop is monitored through the jump relay and the close relay; by judging the position return signal when the control is started, the start logic judges whether the control loop disconnection condition is normally detected, and only when the control is started, the judgment is started, the real-time detection requirement of the loop disconnection cannot be met, and the disconnection detection based on the whole control loop cannot distinguish upstream and downstream faults and accurately position disconnection fault points.
Disclosure of Invention
Accordingly, an object of the embodiments of the present application is to provide a control loop disconnection detecting device and a detecting method for a power distribution device, which can detect a disconnection condition of a secondary protection device loop of the power distribution device at an upstream side and a disconnection condition of a primary device loop of the power distribution device at a downstream side, and can detect a voltage signal at a node of each section of line in real time, thereby rapidly and accurately positioning a disconnection fault point.
In a first aspect, an embodiment of the present application provides a control loop disconnection detection apparatus for a power distribution device, including a secondary device control loop module, an upstream control loop disconnection detection module, a primary device control loop module, a downstream control loop disconnection detection module, and an alarm module; the secondary equipment control loop module is used for secondary equipment output control, the upstream control loop disconnection detection module is connected with the secondary equipment control loop module and used for detecting first disconnection information of the secondary equipment control loop module and sending the first disconnection information to the alarm module, and the alarm module is used for receiving the first disconnection information and giving an alarm and sending the first disconnection information to an upper computer;
the primary equipment control loop module is used for controlling primary equipment, the downstream control loop disconnection detection module is connected with the primary equipment control loop module, the downstream control loop disconnection detection module is used for detecting second disconnection information of the primary equipment control loop module and sending the second disconnection information to the alarm module, and the alarm module is used for receiving the second disconnection information and alarming and sending the second disconnection information to the upper computer.
Optionally, the upstream control loop disconnection detection module and the downstream control loop disconnection detection module have the same disconnection detection circuit, the disconnection detection circuit comprises a high-voltage optocoupler, a voltage comparator and a low-pass filter, the high-voltage optocoupler is used for electrically isolating an input high voltage and then outputting a voltage signal to the low-pass filter for filtering, and the voltage signal is input to the voltage comparator for voltage comparison operation after filtering is completed.
Optionally, the disconnection detecting circuit further includes a reference voltage generator and an adjusting resistor, the adjusting resistor is used for adjusting a resistance value, so that the disconnection detecting circuit detects disconnection of the control loop modules with different voltage levels, the reference voltage generator is used for generating a reference voltage and inputting the reference voltage to the voltage comparator, and the voltage comparator compares the voltage signal with the reference voltage.
Optionally, the control loop disconnection detection device further comprises an alarm signal acquisition unit, an alarm signal transmission unit and an on-site alarm state indication unit, wherein the signal power supply is respectively connected with the alarm signal transmission unit and the on-site alarm state indication unit, and the alarm signal transmission unit is used for transmitting alarm signals to the on-site alarm state indication unit and the alarm signal acquisition unit.
Optionally, the secondary equipment control loop module includes secondary equipment switch-on control unit and secondary equipment brake-off control unit, the broken line detection module of upstream control loop includes broken line detection unit of upstream switch-on and upstream brake-off broken line detection unit, the secondary equipment switch-on control unit is used for controlling the secondary equipment is switched on, the broken line detection unit of upstream switch-on is used for detecting the broken line information of the first switch-on of secondary equipment switch-on control unit, and will first switch-on broken line information is sent to alarm module carries out the warning, the secondary equipment brake-off control unit is used for controlling the secondary equipment is broken brake, the broken line detection unit of upstream brake-off is used for detecting the broken line information of the first brake-off of secondary equipment brake-off control unit, and will first brake-off broken line information is sent to alarm module carries out the warning.
Optionally, the primary device control loop module includes a primary device closing control unit and a primary device opening control unit, the downstream control loop disconnection detection module includes a downstream closing disconnection detection unit and a downstream opening disconnection detection unit, the primary device closing control unit is used for controlling the primary device to close, the downstream closing disconnection detection unit is used for detecting second closing disconnection information of the primary device closing control unit, and sending the second closing disconnection information to the alarm module for alarm, the primary device opening control unit is used for controlling the primary device to open, and the downstream opening disconnection detection unit is used for detecting second opening disconnection information of the primary device opening control unit, and sending the second opening disconnection information to the alarm module for alarm.
Optionally, the detection device further includes a power module, the power module includes a working power supply and a signal power supply, the working power supply is used for providing detection working voltage, the signal power supply is used for providing alarm working voltage, the broken wire detection circuit further includes a working power supply protection circuit, the working power supply is connected with the working power supply protection circuit, and the working power supply protection circuit is used for lightning stroke surge protection and electric fast transient pulse group anti-interference for the working power supply.
Optionally, the working power supply protection circuit includes a first stage protection circuit and a second stage protection circuit, where the first stage protection circuit is configured to perform primary filtering on the lightning stroke surge and the electric fast transient pulse group of the working power supply, and the second stage protection circuit is configured to perform secondary filtering on the lightning stroke surge and the electric fast transient pulse group of the working power supply.
In a second aspect, an embodiment of the present application provides a control loop disconnection detection method of a power distribution device, which is executed by a control loop disconnection detection device as described above, where the detection method includes:
detecting the broken wire of the secondary equipment control loop module in real time through the upstream control loop broken wire detection module;
when the upstream control loop disconnection detection module detects that the secondary equipment control loop module is disconnected, generating first disconnection information and sending the first disconnection information to the alarm module;
detecting the broken wire of the primary equipment control loop module in real time through the downstream control loop broken wire detection module;
when the downstream control loop disconnection detection module detects that the primary equipment control loop module is disconnected, generating second disconnection information, and sending the second disconnection information to the alarm module;
the alarm module generates first on-site alarm information and second on-site alarm information according to the received first disconnection information and second disconnection information, and sends the first disconnection information and the second disconnection information to the upper computer.
Optionally, the detecting, by the upstream control loop disconnection detecting module, the disconnection of the secondary device control loop module in real time specifically includes:
acquiring a voltage signal of the secondary equipment control loop module through a voltage comparator;
acquiring a reference voltage generated by a reference voltage generator through the voltage comparator;
comparing the voltage signal with the reference voltage;
and detecting the broken wire of the secondary equipment control loop module in real time according to the comparison operation result.
The control loop disconnection detection device for implementing the embodiment of the application has the following beneficial effects: the system comprises a secondary equipment control loop module, an upstream control loop disconnection detection module, a primary equipment control loop module, a downstream control loop disconnection detection module and an alarm module; the secondary equipment control loop module is used for secondary equipment output control, the upstream control loop disconnection detection module is connected with the secondary equipment control loop module, the upstream control loop disconnection detection module is used for detecting first disconnection information of the secondary equipment control loop module and sending the first disconnection information to the alarm module, and the alarm module is used for receiving the first disconnection information and alarming and sending the first disconnection information to the upper computer; the primary equipment control loop module is used for controlling primary equipment, the downstream control loop disconnection detection module is connected with the primary equipment control loop module, the downstream control loop disconnection detection module is used for detecting second disconnection information of the primary equipment control loop module and sending the second disconnection information to the alarm module, and the alarm module is used for receiving the second disconnection information and giving an alarm and sending the second disconnection information to the upper computer. The broken wire of the secondary equipment control loop module is detected in real time through the upstream control loop broken wire detection module, the broken wire of the primary equipment control loop module is detected in real time through the downstream control loop broken wire detection module, voltage signals at each section of line node can be detected in real time, and the broken wire fault point can be positioned accurately.
The control loop disconnection detection method of the embodiment of the application has the following beneficial effects: detecting the broken wire of the secondary equipment control loop module in real time through the upstream control loop broken wire detection module; when the upstream control loop disconnection detection module detects that the secondary equipment control loop module is disconnected, generating first disconnection information and sending the first disconnection information to the alarm module; detecting the broken wire of the primary equipment control loop module in real time through the downstream control loop broken wire detection module; when the downstream control loop disconnection detection module detects that the primary equipment control loop module is disconnected, generating second disconnection information, and sending the second disconnection information to the alarm module; the alarm module generates first on-site alarm information and second on-site alarm information according to the received first disconnection information and second disconnection information, and sends the first disconnection information and the second disconnection information to the upper computer; optionally, a voltage signal of the secondary equipment control loop module is obtained through a voltage comparator; acquiring a reference voltage generated by a reference voltage generator through the voltage comparator; comparing the voltage signal with the reference voltage; and detecting the broken line of the secondary equipment control loop module in real time according to the comparison operation result, and detecting the voltage signal at each section of line node in real time to quickly and accurately locate the broken line fault point.
Drawings
Fig. 1 is a schematic structural diagram of a control loop disconnection detecting device of a power distribution device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a specific structure of a control loop disconnection detecting device of a power distribution device according to an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a disconnection detecting circuit according to an embodiment of the present application;
fig. 4 is a flowchart of a method for detecting a disconnection of a control loop of a power distribution device according to an embodiment of the present application.
Detailed Description
The application will now be described in further detail with reference to the drawings and to specific examples. The step numbers in the following embodiments are set for convenience of illustration only, and the order between the steps is not limited in any way, and the execution order of the steps in the embodiments may be adaptively adjusted according to the understanding of those skilled in the art.
As shown in fig. 1, an embodiment of the present application provides a control loop disconnection detecting device of a power distribution device, including a secondary device control loop module, an upstream control loop disconnection detecting module, a primary device control loop module, a downstream control loop disconnection detecting module and an alarm module; the secondary equipment control loop module is used for secondary equipment output control, the upstream control loop disconnection detection module is connected with the secondary equipment control loop module and used for detecting first disconnection information of the secondary equipment control loop module and sending the first disconnection information to the alarm module, and the alarm module is used for receiving the first disconnection information and giving an alarm and sending the first disconnection information to an upper computer;
the primary equipment control loop module is used for controlling primary equipment, the downstream control loop disconnection detection module is connected with the primary equipment control loop module, the downstream control loop disconnection detection module is used for detecting second disconnection information of the primary equipment control loop module and sending the second disconnection information to the alarm module, and the alarm module is used for receiving the second disconnection information and alarming and sending the second disconnection information to the upper computer.
Referring to fig. 2, optionally, the secondary device control loop module includes a secondary device closing control unit and a secondary device opening control unit, the upstream control loop disconnection detection module includes an upstream closing disconnection detection unit and an upstream opening disconnection detection unit, the secondary device closing control unit is used for closing by secondary device output control, the upstream closing disconnection detection unit is used for detecting first closing disconnection information of the secondary device closing control unit and sending the first closing disconnection information to the alarm module for alarm, the secondary device opening control unit is used for opening by secondary device output control, and the upstream opening disconnection detection unit is used for detecting first opening disconnection information of the secondary device opening control unit and sending the first opening disconnection information to the alarm module for alarm.
Referring to fig. 2, optionally, the primary device control loop module includes a primary device closing control unit and a primary device opening control unit, the downstream control loop disconnection detection module includes a downstream closing disconnection detection unit and a downstream opening disconnection detection unit, the primary device closing control unit is used for controlling the primary device to close, the downstream closing disconnection detection unit is used for detecting second closing disconnection information of the primary device closing control unit, and sending the second closing disconnection information to the alarm module for alarm, the primary device opening control unit is used for controlling the primary device to open, and the downstream opening disconnection detection unit is used for detecting the second opening disconnection information of the primary device opening control unit and sending the second opening disconnection information to the alarm module for alarm.
Referring to fig. 2, in a specific embodiment, the power distribution device of the embodiment of the present application includes a signal power source, a secondary device opening control unit, a secondary device closing control unit, a working power source, an alarm signal acquisition unit, a primary device opening control unit, and a primary device closing control unit, where the signal power source is connected to the local alarm state indication unit and the alarm signal transmission unit respectively, and connected to the alarm signal acquisition unit through the alarm signal transmission unit, the secondary device opening control unit is connected to the upstream opening wire detection unit and the downstream opening wire detection unit respectively, and connected to the primary device opening control unit through the downstream opening wire detection unit, the secondary device closing control unit is connected to the upstream opening wire detection unit and the downstream opening wire detection unit respectively, and connected to the primary device closing control unit through the downstream opening wire detection unit, and the working power source is connected to the working power source protection circuit. The device has two groups of power supplies, namely a working power supply and a signal power supply, wherein the working power supply is used for providing working power supplies of an upstream opening wire breakage detection unit, a downstream opening wire breakage detection unit, an upstream closing wire breakage detection unit and a downstream closing wire breakage detection unit, and the signal power supply is used for providing working power supplies of an on-site alarm state indication unit and an alarm signal transmission unit; detecting the disconnection state of the secondary equipment closing control unit in real time through an upstream closing disconnection detection unit, and detecting the disconnection state of the primary equipment closing control unit in real time through a downstream closing disconnection detection unit; detecting the disconnection state of the secondary equipment disconnection control unit in real time through an upstream disconnection detection unit, and detecting the disconnection state of the primary equipment disconnection control unit in real time through a downstream disconnection detection unit; the alarm signal transmission unit is used for transmitting the first opening/closing wire breaking information and the second opening/closing wire breaking information to the on-site alarm signal indication unit for real-time indication, and the alarm signal acquisition unit is used for transmitting the first opening/closing wire breaking information and the second opening/closing wire breaking information to the alarm signal acquisition unit for acquisition, and then the alarm signal acquisition unit is used for transmitting the first opening/closing wire breaking information and the second opening/closing wire breaking information to the upper computer, so that the upper computer can obtain the wire breaking position according to the received information.
Referring to fig. 3, optionally, the upstream control loop disconnection detection module and the downstream control loop disconnection detection module have the same disconnection detection circuit, where the disconnection detection circuit includes a high-voltage optocoupler, a voltage comparator, and a low-pass filter, where the high-voltage optocoupler is used to electrically isolate an input high voltage and output a voltage signal to the low-pass filter for filtering, and after filtering is completed, the voltage signal is input to the voltage comparator for voltage comparison operation.
Optionally, the upstream closing disconnection detection unit further includes a reference voltage generator and an adjusting resistor, the adjusting resistor is used for adjusting a resistance value, so that the disconnection detection circuit detects disconnection of the control loop modules with different voltage levels, the reference voltage generator is used for generating a reference voltage and inputting the reference voltage to the voltage comparator, and the voltage comparator compares the voltage signal with the reference voltage.
Referring to fig. 3, in a specific embodiment, the upstream control loop disconnection detection module and the downstream control loop disconnection detection module have the same disconnection detection circuit, that is, the upstream opening/closing disconnection detection unit and the downstream opening/closing disconnection detection unit have the same disconnection detection circuit, the disconnection detection circuit includes a high-voltage optocoupler U1, a low-pass filter composed of voltage comparators U2, R5 and C2, a reference voltage generator composed of R6 and R7, filter capacitors C3 and C4, and a control loop composed of MOS transistors Q3, R5 and C2, except for filtering line ripple interference, is further provided with a reference voltage supply to the voltage comparator U2 for preventing the voltage comparator from being damaged, and the reference voltage generator composed of R6 and R7 supplies reference voltages to the voltage comparator U2 for the control loops of different voltage classes by adjusting the value of a resistor R1, so that the voltage comparators can compare the control loops of different voltage classes; the high-voltage isolation optocoupler isolates the peak blocking voltage 600V, meets the use requirement of 0-DC 330V of a working power supply, isolates the voltage to 5300Vms, completely realizes the electrical isolation between the high voltage of an input end and the high voltage of an output end, has strong anti-interference capability, and the voltage comparator U2 adopts a domestic core SGM8752, has the advantages of small volume, wide power supply voltage range of 2.7-5.5V, wide temperature range of-40-125 ℃, transmission delay as low as 6.5ns and the like, and particularly, an upstream opening brake broken line detection unit, a downstream closing brake broken line detection unit and a downstream opening brake broken line detection unit have the same circuits as the upstream closing brake broken line detection unit, and the specific working principle is the same.
Referring to fig. 2, optionally, the control loop disconnection detecting device further includes an alarm signal acquisition unit, an alarm signal transmission unit and an in-situ alarm state indicating unit, the signal power supply is respectively connected with the alarm signal transmission unit and the in-situ alarm state indicating unit, and the alarm signal transmission unit is used for transmitting an alarm signal to the in-situ alarm state indicating unit and the alarm signal acquisition unit.
Specifically, the alarm signal transmission unit is connected with the voltage comparator through the MOS tube, and the alarm signal transmission unit transmits the alarm signal sent by the voltage comparator to the alarm signal acquisition unit.
Optionally, the detection device further includes a power module, the power module includes a working power supply and a signal power supply, the working power supply is used for providing detection working voltage, the signal power supply is used for providing alarm working voltage, the working power supply is connected with a working power supply protection circuit, and the working power supply protection circuit is used for carrying out lightning surge and electric fast transient pulse group filtration on the working power supply.
Optionally, the working power supply protection circuit includes a first stage protection circuit and a second stage protection circuit, the first stage protection circuit is used for performing primary filtering on the lightning stroke surge and the electric fast transient pulse group of the working power supply, and the second stage protection circuit is used for performing secondary filtering on the lightning stroke surge and the electric fast transient pulse group of the working power supply.
In a specific embodiment, the working power supply protection circuit comprises a first-stage protection circuit formed by a piezoresistor YM1 and an anti-surge resistor R3, absorbs more than 95% of lightning surge and disturbance of an electric fast transient pulse group, and a second-stage protection circuit formed by a power resistor R2 and a TVS tube TVS1 and is used for absorbing the rest of lightning surge and disturbance of the electric fast transient pulse group, so that double protection effects are achieved, and safety and stability of a back-end circuit are protected.
The control loop disconnection detection device for implementing the embodiment of the application has the following beneficial effects: comprising the following steps: the secondary equipment switching-on control unit is connected with an upstream switching-on broken line detection unit, and is used for detecting the switching-on loop broken line of the upstream secondary equipment in real time through the upstream switching-on broken line detection unit after the secondary equipment is switched on; the secondary equipment opening control unit is connected with an upstream opening wire breakage detection unit, the opening circuit breakage of the upstream secondary equipment is detected in real time through the upstream opening wire breakage detection unit after the secondary equipment opening, the primary equipment opening control unit is connected with the downstream opening wire breakage detection unit, the downstream primary equipment opening control unit is used for opening the downstream, and the downstream opening wire breakage detection unit is used for detecting the opening circuit breakage of the primary equipment in real time. The circuit breaking of the secondary equipment is detected in real time through the upstream secondary equipment opening/closing control unit and the upstream opening/closing broken line detection unit, and the circuit breaking of the upstream secondary equipment is detected in real time through the downstream secondary equipment opening/closing control unit and the upstream opening/closing broken line detection unit, so that voltage signals at the nodes of each section of circuit can be detected in real time, and the broken line fault point can be positioned accurately.
The application can detect the upstream disconnection of the control loop of the power distribution equipment in real time and the downstream disconnection of the control loop of the equipment in real time, and has the advantages of wide detection range, accurate fault positioning and high instantaneity; the application can realize the disconnection detection of control loops with different voltage levels by adjusting the resistor, and has wide detection range; the service life of the high-voltage optocoupler isolator adopted by the application can reach more than 15 years, the requirement of 15 years of service life of power distribution equipment is met, the high-voltage optocoupler isolator has the advantage of long service life, no mechanical contact wear is caused on electronic elements, and the reliability is higher; the application integrally adopts the patch element, has small volume, only 1/4 of the volume of 1 relay, can be integrated in equipment, can be embedded into the equipment for use, and has flexible installation mode; the application has the advantages of overall cost less than 1/5 of 1 relay, low cost and obvious economic advantage; the application does not depend on software logic judgment, and even if the CPU does not run, the disconnection fault point can be intuitively distinguished through the status indicator lamp, thereby rapidly removing the fault. The application can be applied to other embedded devices, can be used for multiplexing expansion according to the needs, and has high practicability, expansibility and universality.
As shown in fig. 3, an embodiment of the present application provides a control loop disconnection detection method of a power distribution device, which is executed by a control loop disconnection detection device as described above, and the detection method includes:
s100, detecting the broken wire of the secondary equipment control loop module in real time through the upstream control loop broken wire detection module.
And S200, when the upstream control loop disconnection detection module detects that the secondary equipment control loop module is disconnected, generating the first disconnection information, and sending the first disconnection information to the alarm module.
S300, detecting the disconnection of the primary equipment control loop module in real time through the downstream control loop disconnection detection module.
And S400, when the downstream control loop disconnection detection module detects that the primary equipment control loop module is disconnected, generating second disconnection information, and sending the second disconnection information to the alarm module.
S400, the alarm module generates first on-site alarm information and second on-site alarm information according to the received first disconnection information and second disconnection information, and sends the first disconnection information and the second disconnection information to the upper computer.
Optionally, the detecting, by the upstream closing broken line detecting unit, the broken line of the secondary device control loop module in real time specifically includes:
s110, acquiring a voltage signal of the secondary equipment control loop module through a voltage comparator.
S120, acquiring the reference voltage generated by the reference voltage generator through the voltage comparator.
S130, comparing the voltage signal with the reference voltage;
and S140, detecting the broken line of the secondary equipment control loop module in real time according to the comparison operation result.
Specifically, when the secondary equipment switching-on loop breaks, vin+ of the voltage comparator U2 is low, compared with the reference voltage VIN-, so that the output of the voltage comparator U2OUT is low, the MOS transistor Q3 is not conducted, the upstream switching-on broken line alarm signal DO1 outputs high level, on one hand, the alarm signal is transmitted to the alarm signal acquisition unit through the alarm signal transmission unit, the upstream switching-on broken line real-time detection function is realized, and on the other hand, the current alarm state is displayed through the alarm indicator corresponding to the point of the on-site alarm state indication unit. In addition, the principles of the downstream switch-on and switch-off detection unit 3, the upstream switch-off and switch-off detection unit 4 and the downstream switch-off and switch-off detection unit 5 are the same as those of the upstream switch-on and switch-off detection unit 2, and because the input voltage vin+ and the adjustment reference voltage VIN-under the condition of switch-off of different loops are different, the switch-on or switch-off of the switch-off alarm signals of different loops can be realized by comparing the signal levels of vin+ and VIN-, so that the switch-off detection of different loops can be realized.
The control loop disconnection detection method of the embodiment of the application has the following beneficial effects: detecting the disconnection of a closing loop of upstream secondary equipment in real time through the upstream closing disconnection detection unit; detecting the disconnection of a closing loop of the downstream primary equipment in real time through the downstream closing disconnection detection unit; detecting the disconnection of the disconnecting loop of the upstream secondary equipment in real time through the upstream disconnection line detection unit; detecting the disconnection of the disconnection circuit of the downstream primary equipment in real time through the downstream disconnection line detection unit; optionally, acquiring a closing loop voltage signal of the upstream secondary device through the voltage comparator; acquiring the reference voltage generated by the reference voltage generator through the voltage comparator; comparing the voltage signal with the reference voltage; and generating an alarm signal according to the comparison operation result, inputting the alarm signal into an on-site alarm state indicating unit for alarm indication, and inputting the alarm signal into an alarm signal acquisition unit for real-time detection of disconnection of a closing loop of upstream secondary equipment, so that voltage signals at each section of line node can be detected in real time, and the disconnection fault point can be rapidly and accurately positioned.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (10)
1. The control loop disconnection detection device of the power distribution equipment is characterized by comprising a secondary equipment control loop module, an upstream control loop disconnection detection module, a primary equipment control loop module, a downstream control loop disconnection detection module and an alarm module; the secondary equipment control loop module is used for secondary equipment output control, the upstream control loop disconnection detection module is connected with the secondary equipment control loop module and used for detecting first disconnection information of the secondary equipment control loop module and sending the first disconnection information to the alarm module, and the alarm module is used for receiving the first disconnection information and giving an alarm and sending the first disconnection information to an upper computer;
the primary equipment control loop module is used for controlling primary equipment, the downstream control loop disconnection detection module is connected with the primary equipment control loop module, the downstream control loop disconnection detection module is used for detecting second disconnection information of the primary equipment control loop module and sending the second disconnection information to the alarm module, and the alarm module is used for receiving the second disconnection information and alarming and sending the second disconnection information to the upper computer.
2. The control loop disconnection detection device according to claim 1, wherein the secondary equipment control loop module comprises a secondary equipment closing control unit and a secondary equipment opening control unit, the upstream control loop disconnection detection module comprises an upstream closing disconnection detection unit and an upstream opening disconnection detection unit, the secondary equipment closing control unit is used for controlling the secondary equipment to close, the upstream closing disconnection detection unit is used for detecting first closing disconnection information of the secondary equipment closing control unit and sending the first closing disconnection information to the alarm module for alarm, the secondary equipment opening control unit is used for controlling the secondary equipment to open, and the upstream opening disconnection detection unit is used for detecting the first opening disconnection information of the secondary equipment opening control unit and sending the first opening disconnection information to the alarm module for alarm.
3. The control loop disconnection detection device according to claim 1, wherein the primary device control loop module comprises a primary device closing control unit and a primary device disconnection control unit, the downstream control loop disconnection detection module comprises a downstream closing disconnection detection unit and a downstream disconnection detection unit, the primary device closing control unit is used for controlling the primary device to close, the downstream closing disconnection detection unit is used for detecting second closing disconnection information of the primary device closing control unit and sending the second closing disconnection information to the alarm module to alarm, the primary device disconnection control unit is used for controlling the primary device to disconnect, and the downstream disconnection detection unit is used for detecting second disconnection information of the primary device disconnection control unit and sending the second disconnection information to the alarm module to alarm.
4. The control loop disconnection detection device according to claim 1, wherein the upstream control loop disconnection detection module and the downstream control loop disconnection detection module have the same disconnection detection circuit, the disconnection detection circuit comprises a high-voltage optocoupler, a voltage comparator and a low-pass filter, the high-voltage optocoupler is used for electrically isolating an input high voltage and outputting a voltage signal to the low-pass filter for filtering, and the voltage signal is input to the voltage comparator for voltage comparison operation after the filtering is completed.
5. The control loop disconnection detecting device according to claim 4, wherein the disconnection detecting circuit further includes a reference voltage generator for generating a reference voltage and inputting the reference voltage to the voltage comparator, and an adjusting resistor for adjusting a resistance value to cause the disconnection detecting circuit to perform disconnection detection on the control loop modules of different voltage levels, the voltage comparator performing a comparison operation of the voltage signal and the reference voltage.
6. The control loop disconnection detection device of claim 4, further comprising a power module including a working power source for providing a detection working voltage and a signal power source for providing an alarm working voltage, and further comprising a working power source protection circuit connected to the working power source protection circuit for lightning surge protection and electrical fast transient pulse group immunity to the working power source.
7. The control loop disconnection detection device of claim 6, wherein the operating power supply protection circuit comprises a first stage protection circuit for initially filtering the lightning stroke surge and the electrical fast transient pulse group of the operating power supply and a second stage protection circuit for re-filtering the lightning stroke surge and the electrical fast transient pulse group of the operating power supply.
8. The control loop disconnection detecting device according to claim 1, wherein the alarm module further comprises an alarm signal acquisition unit, an alarm signal transmission unit and an on-site alarm state indication unit, the alarm signal transmission unit is used for transmitting the first disconnection information and the second disconnection information to the on-site alarm state indication unit to perform on-site alarm, and the alarm signal acquisition unit is used for receiving the first disconnection information and the second disconnection information transmitted by the alarm signal transmission unit and sending the first disconnection information and the second disconnection information to the upper computer.
9. A control loop disconnection detection method of a power distribution apparatus, performed by the control loop disconnection detection device according to any one of claims 1 to 8, the detection method comprising:
detecting the broken wire of the secondary equipment control loop module in real time through the upstream control loop broken wire detection module;
when the upstream control loop disconnection detection module detects that the secondary equipment control loop module is disconnected, generating first disconnection information and sending the first disconnection information to the alarm module;
detecting the broken wire of the primary equipment control loop module in real time through the downstream control loop broken wire detection module;
when the downstream control loop disconnection detection module detects that the primary equipment control loop module is disconnected, generating second disconnection information, and sending the second disconnection information to the alarm module;
the alarm module generates first on-site alarm information and second on-site alarm information according to the received first disconnection information and second disconnection information, and sends the first disconnection information and the second disconnection information to the upper computer.
10. The detection method according to claim 9, wherein the detecting, by the upstream control loop disconnection detection module, the disconnection of the secondary device control loop module in real time specifically includes:
acquiring a voltage signal of the secondary equipment control loop module through a voltage comparator;
acquiring a reference voltage generated by a reference voltage generator through the voltage comparator;
comparing the voltage signal with the reference voltage;
and detecting the broken wire of the secondary equipment control loop module in real time according to the comparison operation result.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310559831.1A CN116718948A (en) | 2023-05-17 | 2023-05-17 | Control loop broken line detection device and detection method of power distribution equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310559831.1A CN116718948A (en) | 2023-05-17 | 2023-05-17 | Control loop broken line detection device and detection method of power distribution equipment |
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| CN116718948A true CN116718948A (en) | 2023-09-08 |
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| CN202310559831.1A Pending CN116718948A (en) | 2023-05-17 | 2023-05-17 | Control loop broken line detection device and detection method of power distribution equipment |
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| CN (1) | CN116718948A (en) |
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