CN111679653A - Intelligent fault recording device and direct-current field control loop fault positioning method - Google Patents
Intelligent fault recording device and direct-current field control loop fault positioning method Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
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- G—PHYSICS
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The application provides an intelligent fault recording device and a fault positioning method for a direct current field control loop, which comprise the following steps: an analysis processing module; the input module is connected with the analysis processing module; the alarm module is connected with the analysis processing module; the input module comprises an opening/closing signal input module, a linkage signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module; the analysis processing module comprises a control loop associated signal configuration module and an operation module; the fault of the DC field control loop can be more conveniently and quickly positioned.
Description
Technical Field
The application relates to the technical field of high-voltage direct-current power transmission, in particular to an intelligent fault recording device and a direct-current field control loop fault positioning method.
Background
In a direct current field of a converter station of a direct current transmission project, various direct current breakers and disconnecting links exist, and according to the actual operation situation, the operation mode of the direct current field often needs to be adjusted, so that the states of the disconnecting links and the breakers also need to be adjusted. The adjustment of the states of the disconnecting link and the circuit breaker requires remote control signals to be sent remotely (a master control room) or locally (the disconnecting link and a circuit breaker body operating box), and meanwhile, remote signaling signals of the opening and closing states of the disconnecting link and the circuit breaker, the body oil pressure, the air pressure and the like are also partially transmitted to the master control room. The carrier for transmitting remote control and remote signaling signals is called a control loop. The reliability of the control loop directly affects the changes of the states of the disconnecting link and the breaker and the analysis and judgment of field technicians. If the control circuit has problems, field technicians need to look up a large number of signals and completion drawings in a main control room and locate fault points by combining test tools such as a multimeter, a large amount of time is consumed in the process, faults are found on the field under the condition of high-voltage electrification, and potential safety hazards exist. It is desirable to provide a solution to facilitate more convenient and faster locating of dc field control loop faults.
Disclosure of Invention
The application aims to provide an intelligent fault recording device and a direct current field control loop fault positioning method, which are used for achieving the technical effect of conveniently and quickly positioning the direct current field control loop fault.
In a first aspect, an embodiment of the present application provides an intelligent fault recording device, including an analysis processing module; the input module is connected with the analysis processing module; the alarm module is connected with the analysis processing module; the input module comprises an opening/closing signal input module, a linkage signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module; the analysis processing module comprises a control loop associated signal configuration module and an operation module.
Further, the analysis processing module further comprises a knife switch/switch position correlation learning module based on the interlocking signal.
Further, the analysis processing module further comprises a control loop relevance learning module.
Furthermore, the input module also comprises a direct current power supply positive/negative voltage signal input module.
Further, the alarm module comprises an alarm and a display.
Further, the alarm is a buzzer or a voice alarm.
In a second aspect, an embodiment of the present application provides a method for locating a fault of a dc field control loop, including obtaining an opening/closing signal, an interlocking signal, an intermediate relay node position signal, a switch/disconnecting link position signal, and a high-voltage bus voltage/current signal of the dc field control loop; analyzing whether the remote and local on-off switch position of the direct current field control loop is normal or not according to the on/off signal and the switch/disconnecting link position signal, and if not, starting an alarm device to give an early warning prompt; analyzing whether each index of the breaker body is normal or not according to the position signal of the intermediate relay node, and if the index is abnormal, starting an alarm device to give an early warning prompt to the abnormal intermediate relay; and analyzing whether the remote control loop is normal or not according to the interlocking signal and the high-voltage bus voltage/current signal, and if not, starting an alarm device to perform early warning prompt on the abnormal interlocking signal.
Further, the method further comprises: acquiring a direct-current power supply positive/negative voltage signal of a control loop, analyzing whether the control loop has a direct-current power supply ground fault or not according to the direct-current power supply positive/negative voltage signal, and starting an alarm device to give an early warning prompt if the control loop has the direct-current power supply ground fault.
Further, the method further comprises: and analyzing the relevance of the action sequence of each switch, knife switch and breaker in the control loop according to the interlocking signal.
Further, the method further comprises: and analyzing the relevance of each control loop after the switching-off/switching-on signal is issued according to the switching-off/switching-on signal.
The beneficial effect that this application can realize is: the input module can be used for acquiring various signals such as opening/closing signals, linkage signals, intermediate relay node position signals, switch/disconnecting link position signals, high-voltage bus voltage/current signals and the like in a control loop. After the relevance among the signals set in the control loop relevant signal configuration module of the analysis module is achieved, the operation module can be used for positioning the fault in the control loop according to the obtained signals, and the fault of the direct current field control loop can be positioned more conveniently and quickly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of a topological structure of an intelligent fault recording apparatus according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a method for locating a fault in a dc field control loop according to an embodiment of the present disclosure.
Icon: 10-intelligent fault recording device; 100-an analysis processing module; 110-control loop associated signal configuration module; 120-an operation module; 130-linkage signal based knife switch/switch position correlation learning module; 140-control loop association learning module; 200-an input module; 210-an opening/closing signal input module; 220-interlock signal input module; 230-intermediate relay node position signal input module; 240-switch/knife switch position signal input module; 250-high voltage bus voltage/current signal input module; 260-a direct current power supply positive/negative voltage signal input module; 300-an alarm module; 310-an alarm; 320 — display.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic view of a topology structure of an intelligent fault recording device according to an embodiment of the present application.
The research of the applicant finds that in a direct current field of a direct current transmission engineering converter station, if a control loop fails, field technicians need to look up a large number of signals and complete a construction drawing in a main control room and locate a fault point by combining test tools such as a multimeter and the like, the process consumes a large amount of time, the fault is found on the field under the condition of high voltage electrification, and potential safety hazards exist. Therefore, the intelligent fault recorder is provided so as to conveniently and quickly locate the fault of the DC field control loop.
In one embodiment, the intelligent fault recorder 10 provided in the embodiment of the present application includes an analysis processing module 100; an input module 200 connected to the analysis processing module 100; an alarm module 300 connected to the analysis processing module 100; the input module 200 comprises an opening/closing signal input module 210, an interlocking signal input module 220, an intermediate relay node position signal input module 230, a switch/disconnecting link position signal input module 240 and a high-voltage bus voltage/current signal input module 250; the analysis processing module 100 includes a control loop related signal configuration module 110 and an operation module 120.
The input module 200 may obtain various signals such as an opening/closing signal, an interlock signal, an intermediate relay node position signal, a switch/disconnecting link position signal, and a high-voltage bus voltage/current signal in a control loop. After the relevance between the signals set in the control loop relevant signal configuration module 110 of the analysis module is obtained, the operation module 120 can be used for positioning the fault in the control loop according to the obtained signals, and field technicians do not need to refer to a large number of signals and completion drawings in a main control room or combine a universal meter and other test tools to position fault points. The fault positioning is more convenient, faster and safer.
In one embodiment, the alarm module 300 includes an alarm 310 and a display 320, through which the alarm 310 can prompt for an alarm; alarm information may be displayed via display 320. The alarm 310 may be a buzzer or a voice alarm. The display 320 may be an LED display screen, an LCD display screen, or the like.
In one embodiment, the analysis processing module 100 further includes a knife/switch position correlation learning module 130 based on the interlock signal. Through the learning module, the relevance between the disconnecting link/the switch can be learned according to the interlocking signals corresponding to the operation executed after the daily disconnecting link and the breaker remote control command is issued. In order to improve accuracy, the correction can also be performed manually.
Some relay excitations may simultaneously activate the opening and closing of other circuit breakers, so in one embodiment, the analysis processing module 100 further includes a control loop association learning module 140 by which the association between control loops may be learned based on the opening and closing operations of circuit breakers after the relay excitations. When fault location is carried out, the location results of the control circuit related to the relay can be combined for judgment, and the location precision can be further improved.
In one embodiment, in order to identify the dc power ground fault of the dc field control loop, the input module 200 provided in the embodiment of the present application further includes a dc power positive/negative voltage signal input module 260. The positive/negative voltage of the dc power supply can be obtained through the positive/negative voltage signal input module 260 of the dc power supply, and whether the ground fault of the dc power supply occurs can be analyzed by comparing the obtained positive/negative voltage with the set threshold.
Specifically, in one embodiment, after acquiring the positive/negative voltage signal of the dc power supply, whether the positive/negative voltage of the dc power supply is less than a threshold K1 may be analyzed, and if the positive/negative voltage of the dc power supply is less than a threshold K1, it indicates that the dc power supply is grounded positively/negatively; whether the positive/negative voltage of the direct current power supply is larger than a threshold value K2 or not can be analyzed, and if the positive/negative voltage of the direct current power supply is larger than a threshold value K2, the negative/positive grounding of the direct current power supply is indicated. Wherein K1 is 85% x dc power rating ÷ 2; k2 ═ 110% x dc power rating ÷ 2. If the circuit breaker is switched on under the condition that no switching-on remote control signal is issued when the positive grounding occurs, the grounding occurs in a switching-on loop, wherein grounding points exist in the uppermost relay and the secondary loop of all the excitation relays in the loop. If the circuit breaker does not act under the condition of downwards sending a closing remote control signal when negative grounding occurs, the circuit breaker indicates that the closing loop is grounded, wherein grounding points exist in the uppermost relay and the secondary loop of all non-excitation relays in the loop.
Please refer to fig. 2, fig. 2 is a schematic flow chart of a dc field control loop fault location method according to an embodiment of the present disclosure.
The embodiment of the application also provides a method for positioning the fault of the direct current field control loop, which comprises the following steps:
step S101, acquiring an opening/closing signal, an interlocking signal, an intermediate relay node position signal, a switch/knife switch position signal and a high-voltage bus voltage/current signal of a direct current field control loop.
The analysis processing module can obtain the signals through an opening/closing signal input module, an interlocking signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module in the input module. The various signals can be acquired at regular time according to the set scanning period, and also can be acquired when some switching values are displaced, and meanwhile, the scanning period can be manually set according to actual requirements.
And S102, analyzing whether the remote local on-off switch position of the direct current field control circuit is normal or not according to the on/off signal and the switch/knife switch position signal, and starting an alarm device to give an early warning prompt if the remote local on-off switch position of the direct current field control circuit is not normal.
Under normal conditions, a remote local on-off switch of the direct current field control circuit is arranged at a remote position or a grounding position, if the remote local on-off switch is arranged at a zero position, any on-off signal cannot enable a circuit breaker to be on or off, the control circuit is disconnected at the remote local on-off switch, the position of a switch/knife switch related to the control circuit is also located at an initial position when the circuit breaker is not powered on, and the operation module can start the alarm module to give an alarm.
And S103, analyzing whether each index of the breaker body is normal or not according to the position signal of the intermediate relay node, and if not, starting an alarm device to give an early warning prompt to the abnormal intermediate relay.
In the direct current field control circuit, when the remote local on-site on-off switch is arranged at a remote position or a grounding position, whether each index of the circuit breaker body is normal or not can be analyzed continuously according to an intermediate relay node position signal on the circuit breaker closing control circuit, and if the index is abnormal, the alarm device is started to give an alarm to the abnormal intermediate relay.
And step S104, analyzing whether the remote control loop is normal or not according to the interlocking signal and the high-voltage bus voltage/current signal, and if not, starting an alarm device to perform early warning prompt on the abnormal interlocking signal.
If the node position of the intermediate relay is normal when the remote local on-off switch is arranged at the remote position or the grounding position, whether the remote control circuit is normal can be further analyzed according to the interlocking signal and the voltage/current signal of the high-voltage bus. Specifically, whether the actual positions of other disconnecting links, grounding switches and circuit breakers in the direct-current field are normal or not can be analyzed according to the interlocking signals, and whether the direct-current field high-voltage bus voltage UdH is greater than 0.1p.u or whether the direct-current bus current IdH is greater than 0.1p.u or not is judged. If the actual positions of other disconnecting links, grounding switches and circuit breakers in the direct-current field are abnormal, alarming and prompting are carried out on the abnormal disconnecting links, grounding switches or circuit breakers through an alarming device; and if the direct-current field high-voltage bus voltage UdH is greater than 0.1p.u or the direct-current bus current IdH is greater than 0.1p.u, starting an alarm device to give an alarm. In one embodiment, the common matching mode of the circuit breaker with other disconnecting switches, grounding switches and circuit breakers can be learned through the interlocking signals.
In one embodiment, the method further includes acquiring a positive/negative voltage signal of the dc power supply of the control loop, analyzing whether the control loop has a ground fault of the dc power supply according to the positive/negative voltage signal of the dc power supply, and if the control loop has the ground fault of the dc power supply, starting an alarm device to give an early warning.
Besides the relevance of the signals in the control loop can be manually configured through the control loop relevant signal configuration module, the method can also analyze the relevance of the action sequence of each switch, knife switch and breaker in the control loop according to the interlocking signals.
Some relays can be excited to start switching-on and switching-off of other circuit breakers at the same time, so in one implementation mode, the relevance of each control loop after the switching-on/switching-off signal is issued can be analyzed according to the switching-on/switching-off signal.
To sum up, the embodiment of the present application provides an intelligent fault recording device and a fault positioning method for a direct current field control loop, including: an analysis processing module; the input module is connected with the analysis processing module; the alarm module is connected with the analysis processing module; the input module comprises an opening/closing signal input module, a linkage signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module; the analysis processing module comprises a control loop associated signal configuration module and an operation module. The input module can be used for acquiring various signals such as opening/closing signals, linkage signals, intermediate relay node position signals, switch/disconnecting link position signals, high-voltage bus voltage/current signals and the like in a control loop. After the relevance among the signals set in the control loop relevant signal configuration module of the analysis module is achieved, the operation module can be used for positioning the fault in the control loop according to the obtained signals, and the fault of the direct current field control loop can be positioned more conveniently and quickly.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An intelligent fault recording device, comprising: an analysis processing module; the input module is connected with the analysis processing module; the alarm module is connected with the analysis processing module; the input module comprises an opening/closing signal input module, a linkage signal input module, an intermediate relay node position signal input module, a switch/disconnecting link position signal input module and a high-voltage bus voltage/current signal input module; the analysis processing module comprises a control loop associated signal configuration module and an operation module.
2. The intelligent fault recording device according to claim 1, wherein the analysis processing module further comprises a knife switch/switch position correlation learning module based on linkage signals.
3. The intelligent fault recording device of claim 1, wherein the analysis processing module further comprises a control loop association learning module.
4. The intelligent fault recording device of claim 1, wherein the input module further comprises a dc power positive/negative voltage signal input module.
5. The intelligent fault recording device of claim 1, wherein the alarm module comprises an alarm and a display.
6. The intelligent fault recording device of claim 5, wherein the alarm is a buzzer or a voice alarm.
7. A fault positioning method for a direct current field control loop is characterized by comprising the following steps:
acquiring an opening/closing signal, an interlocking signal, an intermediate relay node position signal, a switch/disconnecting link position signal and a high-voltage bus voltage/current signal of a direct-current field control loop;
analyzing whether the remote and local on-off switch position of the direct current field control loop is normal or not according to the on/off signal and the switch/disconnecting link position signal, and if not, starting an alarm device to give an early warning prompt;
analyzing whether each index of the breaker body is normal or not according to the position signal of the intermediate relay node, and if the index is abnormal, starting an alarm device to give an early warning prompt to the abnormal intermediate relay;
and analyzing whether the remote control loop is normal or not according to the interlocking signal and the high-voltage bus voltage/current signal, and if not, starting an alarm device to perform early warning prompt on the abnormal interlocking signal.
8. The method of claim 7, further comprising:
acquiring a direct-current power supply positive/negative voltage signal of a control loop, analyzing whether the control loop has a direct-current power supply ground fault or not according to the direct-current power supply positive/negative voltage signal, and starting an alarm device to give an early warning prompt if the control loop has the direct-current power supply ground fault.
9. The method of claim 7, further comprising:
and analyzing the relevance of the action sequence of each switch, knife switch and breaker in the control loop according to the interlocking signal.
10. The method of claim 7, further comprising:
and analyzing the relevance of each control loop after the switching-off/switching-on signal is issued according to the switching-off/switching-on signal.
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Application publication date: 20200918 |
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