CN116699302A - PT wire breakage defect diagnosis method, device and medium for relay protection device - Google Patents
PT wire breakage defect diagnosis method, device and medium for relay protection device Download PDFInfo
- Publication number
- CN116699302A CN116699302A CN202310156793.5A CN202310156793A CN116699302A CN 116699302 A CN116699302 A CN 116699302A CN 202310156793 A CN202310156793 A CN 202310156793A CN 116699302 A CN116699302 A CN 116699302A
- Authority
- CN
- China
- Prior art keywords
- voltage
- abnormal
- protection device
- judging
- condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007547 defect Effects 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000003745 diagnosis Methods 0.000 title claims abstract description 21
- 230000002159 abnormal effect Effects 0.000 claims abstract description 113
- 230000005856 abnormality Effects 0.000 claims abstract description 46
- 238000005070 sampling Methods 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000002950 deficient Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- 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
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a PT disconnection defect diagnosis method, device and medium for a relay protection device. The method comprises the following steps: judging whether any relay protection device collecting the same secondary voltage reports PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection; under the condition that relay protection devices collecting the same secondary voltage report PT disconnection, judging whether secondary voltage output measured at a PT terminal box is normal or not, and if the secondary voltage output is abnormal, judging that the PT disconnection defect is PT to terminal box secondary circuit abnormality and PT fault; if the secondary voltage output is normal, judging whether the bus heavy voltage of each section is normal, and under the condition that the bus heavy voltage of each section is abnormal, judging that the PT disconnection defect is abnormal from the PT terminal box to the parallel screen secondary circuit and the secondary circuit of the auxiliary contact heavy movement of the disconnecting link; and under the condition that the heavy voltage of each section of bus is normal, judging the PT disconnection defect as a voltage parallel relay fault and a parallel secondary circuit abnormality.
Description
Technical Field
The invention relates to the technical field of relay protection devices, and in particular relates to a method, a device and a medium for diagnosing PT disconnection defects of a relay protection device.
Background
According to typical design specification requirements, secondary output voltage of the voltage transformer reaches the voltage parallel device after passing through a PT terminal box or a junction box through secondary voltage single-phase idle opening and PT disconnecting link positions, and the parallel function is completed in the voltage parallel screen and radiated to each protection screen. The voltage switching devices in the protection screens are switched to the bus voltage in the current operation mode through the bus disconnecting link positions. At present, when the PT is abnormal, the fault point can be primarily judged through the defect influence range, for example, only a single-interval protection device sends a PT disconnection alarm, and the fault point is concentrated on the interval device and the secondary circuit. If it is found that PT disconnection abnormality occurs in all protection devices on the same bus of the total station, the protection devices should be concentrated on the bus PT, the voltage parallel devices or the public loop to find fault points. Therefore, the existing PT wire breakage defect diagnosis depends on personnel experience. Because personnel do not know various possible defect positions when PT is broken, the comprehensive defect diagnosis flow of PT broken lines is insufficient. The invention provides a targeted checking point for completely covering each possible defect position of PT wire breakage defects by combining various defect positions of PT wire breakage obtained by statistics of a relay protection professional management system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method, a device and a medium for diagnosing PT disconnection defects of a relay protection device.
According to one aspect of the present invention, there is provided a method for diagnosing a PT disconnection defect of a relay protection device, including:
judging whether any relay protection device collecting the same secondary voltage reports PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection;
under the condition that relay protection devices collecting the same secondary voltage report PT disconnection, judging whether secondary voltage output measured at a PT terminal box is normal or not, and if the secondary voltage output measured at the PT terminal box is abnormal, judging that the PT disconnection defect is PT to terminal box secondary circuit abnormality and PT fault;
if the secondary voltage output measured at the PT terminal box is normal, judging whether the heavy voltage of each section of bus is normal, and if the heavy voltage of each section of bus is abnormal, judging that the PT disconnection defect is abnormal from the PT terminal box to the secondary circuit of the parallel screen and the secondary circuit of the auxiliary contact heavy movement of the disconnecting link;
and under the condition that the heavy voltage of each section of bus is normal, judging the PT disconnection defect as a voltage parallel relay fault and a parallel secondary circuit abnormality.
Optionally, the method further comprises:
judging whether the acquisition value of the relay protection device is consistent with the voltage before voltage switching under the condition that the relay protection device acquiring the same secondary voltage does not report PT disconnection, and judging that the PT disconnection defect is the loop abnormality from the PT terminal box to the voltage switching device under the condition that the acquisition value of the relay protection device is inconsistent with the voltage before voltage switching;
judging whether the back plate voltage of the protection device is consistent with the sampling voltage of the protection device or not under the condition that the acquisition value of the relay protection device is consistent with the voltage before voltage switching, and judging that the PT wire breakage defect is damage to the sampling plate or the CPU plate of the protection device under the condition that the back plate voltage of the protection device is inconsistent with the sampling voltage of the protection device;
judging whether the actual value of the relay protection device is consistent with the voltage after the voltage switching under the condition that the back plate voltage of the protection device is consistent with the sampling voltage of the protection device, and judging that the PT wire breakage defect is abnormal in a secondary circuit after the voltage switching under the condition that the actual value of the relay protection device is inconsistent with the voltage after the voltage switching;
judging whether the open loop is abnormal or not under the condition that the actual adopted value of the relay protection device is consistent with the voltage after the voltage switching, judging whether the auxiliary contact of the disconnecting link is abnormal or not under the condition that the open loop is abnormal, and judging that the PT wire breakage defect is abnormal or virtual connection of the auxiliary contact of the disconnecting link under the condition that the auxiliary contact of the disconnecting link is abnormal;
judging whether the direct current secondary circuit is abnormal or not under the condition that the auxiliary contact of the disconnecting link is not abnormal, and judging that the PT wire breakage defect is abnormal in the direct current secondary circuit under the condition that the direct current secondary circuit is abnormal;
and when the direct current secondary circuit is not abnormal, judging the PT disconnection defect as the abnormality of the voltage switching device.
Optionally, the method further comprises:
judging whether the voltage switching circuit is abnormal or not under the condition that the open circuit is not abnormal, and judging that the PT disconnection defect is virtual connection or open circuit of the voltage switching circuit under the condition that the voltage switching circuit is abnormal;
when the voltage switching circuit is not abnormal, the PT disconnection defect is judged to be abnormal.
Optionally, the open loop exception comprises: and the condition that the switch relay acts simultaneously and no knife switch position indication exists in normal operation occurs.
Optionally, the direct current secondary loop anomaly includes: the direct current secondary circuit is miswired, the direct current secondary circuit is in virtual connection/open circuit, and the polarity of the direct current power supply is wrong.
Optionally, the voltage switching loop anomaly includes: the voltage switching loop is miswired and the voltage switching loop is virtually connected/opened.
According to another aspect of the present invention, there is provided a PT disconnection defect diagnosis device of a relay protection device, including:
the judging module is used for judging whether the relay protection devices collecting the same secondary voltage report PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection;
the first judging module is used for judging whether the secondary voltage output measured at the PT terminal box is normal or not under the condition that the relay protection device collecting the same secondary voltage reports PT disconnection, and judging that the PT disconnection defect is PT to terminal box secondary circuit abnormality and PT fault if the secondary voltage output measured at the PT terminal box is abnormal;
the second judging module is used for judging whether the heavy voltage of each section of bus is normal or not if the secondary voltage output measured at the PT terminal box is normal, and judging that the PT disconnection defect is abnormal from the PT terminal box to the parallel screen secondary circuit and the auxiliary contact point of the disconnecting link is heavy and the secondary circuit is abnormal under the condition that the heavy voltage of each section of bus is abnormal;
and the third judging module is used for judging that the PT disconnection defect is a voltage parallel relay fault and a parallel secondary circuit abnormality under the condition that the heavy voltage of each section of bus is normal.
According to a further aspect of the present invention there is provided a computer readable storage medium storing a computer program for performing the method according to any one of the above aspects of the present invention.
According to still another aspect of the present invention, there is provided an electronic device including: a processor; a memory for storing the processor-executable instructions; the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method according to any of the above aspects of the present invention.
Therefore, compared with the existing defect diagnosis flow, the PT wire breakage defect diagnosis method for the relay protection device provided by the invention is more comprehensive, comprises common defect positions of the on-site PT wire breakage defect, and can provide more sufficient guidance for diagnosis of the PT wire breakage defect.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
fig. 1 is a schematic flow chart of a method for diagnosing a PT disconnection defect of a relay protection device according to an exemplary embodiment of the present invention;
FIG. 2 is a full view of a PT secondary circuit provided by an exemplary embodiment of the present invention;
FIG. 3 is a detailed diagram of a voltage switching circuit provided by an exemplary embodiment of the present invention;
FIGS. 4a, 4b are voltage parallel circuit diagrams provided by an exemplary embodiment of the present invention;
fig. 5 is another flow chart of a method for diagnosing a PT disconnection defect of a relay protection device according to an exemplary embodiment of the present invention;
FIG. 6 is a flow chart of diagnosing PT wire breakage defects in a case provided by an exemplary embodiment of the present invention;
fig. 7 is a schematic structural diagram of a PT disconnection defect diagnosis device of a relay protection device according to an exemplary embodiment of the present invention;
fig. 8 is a structure of an electronic device provided in an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present invention and not all embodiments of the present invention, and it should be understood that the present invention is not limited by the example embodiments described herein.
It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
It will be appreciated by those of skill in the art that the terms "first," "second," etc. in embodiments of the present invention are used merely to distinguish between different steps, devices or modules, etc., and do not represent any particular technical meaning nor necessarily logical order between them.
It should also be understood that in embodiments of the present invention, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.
It should also be appreciated that any component, data, or structure referred to in an embodiment of the invention may be generally understood as one or more without explicit limitation or the contrary in the context.
In addition, the term "and/or" in the present invention is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present invention, the character "/" generally indicates that the front and rear related objects are an or relationship.
It should also be understood that the description of the embodiments of the present invention emphasizes the differences between the embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Embodiments of the invention are operational with numerous other general purpose or special purpose computing system environments or configurations with electronic devices, such as terminal devices, computer systems, servers, etc. Examples of well known terminal devices, computing systems, environments, and/or configurations that may be suitable for use with the terminal device, computer system, server, or other electronic device include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, mainframe computer systems, and distributed cloud computing technology environments that include any of the foregoing, and the like.
Electronic devices such as terminal devices, computer systems, servers, etc. may be described in the general context of computer system-executable instructions, such as program modules, being executed by a computer system. Generally, program modules may include routines, programs, objects, components, logic, data structures, etc., that perform particular tasks or implement particular abstract data types. The computer system/server may be implemented in a distributed cloud computing environment in which tasks are performed by remote processing devices that are linked through a communications network. In a distributed cloud computing environment, program modules may be located in both local and remote computing system storage media including memory storage devices.
Exemplary method
Fig. 1 is a flowchart of a method for diagnosing a PT disconnection defect of a relay protection device according to an exemplary embodiment of the present invention. The embodiment can be applied to an electronic device, as shown in fig. 1, the method 100 for diagnosing a PT disconnection defect of a relay protection device includes the following steps:
step 101, judging whether any relay protection device collecting the same secondary voltage reports PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection;
102, judging whether the secondary voltage output measured at a PT terminal box is normal or not under the condition that relay protection devices collecting the same secondary voltage report PT disconnection, and judging that the PT disconnection defect is PT-to-terminal box secondary circuit abnormality and PT fault if the secondary voltage output measured at the PT terminal box is abnormal;
step 103, if the secondary voltage output measured at the PT terminal box is normal, judging whether the heavy voltage of each section of bus is normal, and if the heavy voltage of each section of bus is abnormal, judging that the PT disconnection defect is abnormal from the PT terminal box to the parallel screen secondary circuit and the auxiliary contact heavy secondary circuit of the disconnecting link is abnormal;
and 104, judging the PT disconnection defect as a voltage parallel relay fault and a parallel secondary circuit abnormality when the heavy voltage of each section of bus is normal.
Optionally, the method further comprises:
judging whether the acquisition value of the relay protection device is consistent with the voltage before voltage switching under the condition that the relay protection device acquiring the same secondary voltage does not report PT disconnection, and judging that the PT disconnection defect is the loop abnormality from the PT terminal box to the voltage switching device under the condition that the acquisition value of the relay protection device is inconsistent with the voltage before voltage switching;
judging whether the back plate voltage of the protection device is consistent with the sampling voltage of the protection device or not under the condition that the acquisition value of the relay protection device is consistent with the voltage before voltage switching, and judging that the PT wire breakage defect is damage to the sampling plate or the CPU plate of the protection device under the condition that the back plate voltage of the protection device is inconsistent with the sampling voltage of the protection device;
judging whether the actual value of the relay protection device is consistent with the voltage after the voltage switching under the condition that the back plate voltage of the protection device is consistent with the sampling voltage of the protection device, and judging that the PT wire breakage defect is abnormal in a secondary circuit after the voltage switching under the condition that the actual value of the relay protection device is inconsistent with the voltage after the voltage switching;
judging whether the open loop is abnormal or not under the condition that the actual adopted value of the relay protection device is consistent with the voltage after the voltage switching, judging whether the auxiliary contact of the disconnecting link is abnormal or not under the condition that the open loop is abnormal, and judging that the PT wire breakage defect is abnormal or virtual connection of the auxiliary contact of the disconnecting link under the condition that the auxiliary contact of the disconnecting link is abnormal;
judging whether the direct current secondary circuit is abnormal or not under the condition that the auxiliary contact of the disconnecting link is not abnormal, and judging that the PT wire breakage defect is abnormal in the direct current secondary circuit under the condition that the direct current secondary circuit is abnormal;
and when the direct current secondary circuit is not abnormal, judging the PT disconnection defect as the abnormality of the voltage switching device.
Optionally, the method further comprises:
judging whether the voltage switching circuit is abnormal or not under the condition that the open circuit is not abnormal, and judging that the PT disconnection defect is virtual connection or open circuit of the voltage switching circuit under the condition that the voltage switching circuit is abnormal;
when the voltage switching circuit is not abnormal, the PT disconnection defect is judged to be abnormal.
Optionally, the open loop exception comprises: and the condition that the switch relay acts simultaneously and no knife switch position indication exists in normal operation occurs.
Optionally, the direct current secondary loop anomaly includes: the direct current secondary circuit is miswired, the direct current secondary circuit is in virtual connection/open circuit, and the polarity of the direct current power supply is wrong.
Optionally, the voltage switching loop anomaly includes: the voltage switching loop is miswired and the voltage switching loop is virtually connected/opened.
Specifically, the main defect sites of the "PT wire break" defect are shown in table 1, and the different rows in table 1 are one possible defect site of the "PT wire break" defect. As shown in table 1, the defect sites where the "PT disconnection" defect is dominant are 13 items in total. For ease of analysis, each defective portion is marked with an english letter, as indicated by the letter marked by the underline next to each defective portion in table 1.
TABLE 1 respective defect sites of PT-off defects
The specific positions of the defect sites in table 1 are shown in fig. 2, 3 and 4. Fig. 2 is a diagram showing the overall configuration of the PT secondary circuit, and positions of 4 defective portions (a protection device sampling board or a CPU board damaged W, PT terminal box-to-voltage switching device circuit abnormality C, PT to a terminal box secondary circuit abnormality Y, PT failure N) in table 1 are marked in the diagram. Fig. 3 and 4 are exploded detail views of the switch/side-by-side screen of fig. 2. Fig. 3 is a detailed diagram of the voltage switching circuit, in which the positions of 6 defective parts (PT terminal box to voltage switching device circuit abnormality C, secondary circuit abnormality B after voltage switching, voltage switching circuit virtual connection/open circuit E, voltage switching device G, knife switch auxiliary contact abnormality or virtual connection U, direct current secondary circuit abnormality X) in table 1 are marked. Fig. 4 is a detailed view of the voltage parallel circuit, in which specific positions of 4 defective portions (a PT terminal box to parallel screen secondary circuit abnormality M, a secondary circuit abnormality L for a secondary circuit such as a knife switch auxiliary contact, a voltage parallel relay failure H, a breaker auxiliary contact, a parallel handle, and the like, and a parallel secondary circuit abnormality J) in table 1 are marked.
In addition, the voltage is reset: the existence/non-existence of the PT secondary voltage and the operation state (input/exit) of the voltage change once keep a corresponding relation, and personal equipment accidents caused by the fact that the secondary winding reversely transmits electricity to the primary when the PT exits from operation once are prevented.
A flow chart of defect diagnosis is shown in fig. 5. In addition to covering 13 defect sites in table 1 (shown in the oval in fig. 5), fig. 5 also contains 10 inspection points (shown in the diamond in fig. 5), from which 10 inspection points a specific defect site can be determined. As can be seen from fig. 5, the defect part is first divided according to whether the report PT disconnection self-checking alarm is a single relay protection device or a plurality of relay protection devices. When only one relay protection device reports PT disconnection, the defect part is on a switching loop, an own loop and the device of the device (as shown in a solid frame range reasoning flow in FIG. 5); when a plurality of relay protection devices report PT disconnection, the defect part is on the PT, the voltage common loop and the parallel loop (as shown in the range reasoning flow of a broken line frame in fig. 5). The diagnosis process is sequentially carried out according to fig. 5, and the diagnosis of the PT disconnection defect is completed. Within the dashed box of fig. 5, a defect review point presents a plurality of defect diagnosis sites, indicating that further individual inspection of each possible defect site is required to ultimately determine the defect site.
Fig. 5 contains 10 inspection points in total, and 13 defect sites are obtained according to the result returned from the inspection points. Specifically, firstly, a checking point is executed to check whether the protection device for collecting the voltage reports PT disconnection, if yes, the branch shown by the virtual frame in fig. 5 is entered, otherwise, the branch shown by the real frame in fig. 5 is entered.
Entering the branch shown by the dashed box, a check point is first made "do it measure the secondary voltage output at the PT terminal box normal? According to the feedback result, if not, 2 defect parts of ' PT to terminal box secondary circuit abnormality Y ' and ' PT fault N ' are obtained, if yes, a check point ' whether the bus heavy voltage of each section is normal? And according to the feedback result, if so, obtaining 2 defect parts of 'voltage parallel relay fault H', 'parallel secondary circuit abnormality J of a breaker auxiliary contact, a parallel handle and the like', and if not, obtaining 2 defect parts of 'PT terminal box to parallel screen secondary circuit abnormality M', 'heavy-duty secondary circuit abnormality L of a disconnecting link auxiliary contact and the like'.
The bus-bar restarting voltage of each section is the voltage at different positions after the voltage transformer transforms the voltage to the secondary side.
Entering the branch shown by the solid line box, executing the "is the device actual acquisition value consistent with the voltage before voltage switching? "is the back plane voltage consistent with the protection samples? "" is the device actual value consistent with the voltage after voltage switching? If not, respectively obtaining 3 defect parts of PT terminal box to voltage switching device loop abnormality C, protection device sampling plate or CPU plate damage W and secondary loop abnormality B after voltage switching; if yes, executing the next check point.
The execution check point "open loop is abnormal? "if yes is returned," is voltage switching loop abnormal? According to the feedback result, a defective part voltage switching loop virtual connection/open circuit E is obtained (the feedback result is yes), and a voltage switching device G is obtained (the feedback result is no); if not, then the check point "is the auxiliary contact of the knife switch abnormal? "is the dc secondary circuit abnormal? If yes, the defect part of "abnormal auxiliary contact or virtual connection U of disconnecting link" and "abnormal X of direct current secondary circuit" are obtained respectively, if no, the defect part of "voltage switching device G" is obtained.
In fig. 5, "whether the open loop is abnormal" specifically means: if the switch relay acts simultaneously, no switch position indication condition exists during normal operation; "voltage switching loop anomaly" specifically refers to: 1. miswiring of the voltage switching loop; 2. virtual connection/open circuit of the voltage switching circuit; "DC secondary loop anomaly" specifically refers to: 1. miswiring of the direct current secondary circuit; 2. virtual connection/open circuit of direct current secondary circuit; 3. the polarity of the direct current power supply is wrong.
In addition, the PT disconnection abnormality processing process of the 220kV II bus-belonging protection device of a certain 220kV transformer substation is selected as a case, and the effectiveness of the PT disconnection defect diagnosis process is elaborated.
The second maintenance personnel receive the notification of the operating personnel that the protection device of the 220kV II bus is reported to be PT broken line by the X year X month X day. According to the invention, in the fig. 5, the secondary maintainer makes a judgment according to the field condition, and the abnormality of the protection device is eliminated due to the abnormality of the protection device at a plurality of intervals, so that the abnormality of the secondary voltage loop can be basically determined.
And a secondary maintainer firstly measures the normal output of the secondary voltage at the PT terminal box, and the judgment of the normal output of the secondary voltage measured in the PT control cabinet is completed. And then judging that the bus heavy voltage is abnormal, particularly that the A-phase voltage is inconsistent before and after the disconnecting link is switched, wherein a possible defect part is 'PT terminal box to parallel screen secondary circuit abnormality M' or 'heavy secondary circuit abnormality L such as a disconnecting link auxiliary contact', and accordingly, the operator further diagnoses, and determines that the defect part is 'heavy secondary circuit abnormality L such as a disconnecting link auxiliary contact', particularly the PT disconnecting link auxiliary contact abnormality in a 220kVII bus voltage circuit. And after the auxiliary contacts of the disconnecting link are replaced, the total station equipment is recovered to be normal. Referring to fig. 5, a detailed flow chart of the diagnosis of the PT disconnection defect is shown in fig. 6, and the PT disconnection defect is determined as a secondary circuit abnormality L such as a disconnecting link auxiliary contact.
Therefore, compared with the existing defect diagnosis flow, the PT broken line defect diagnosis flow chart provided by the invention is more comprehensive, comprises common defect positions of the on-site PT broken line defect, and can provide more sufficient guidance for diagnosis of the relay protection PT broken line defect. .
Exemplary apparatus
Fig. 7 is a schematic structural diagram of a PT disconnection defect diagnosis device of a relay protection device according to an exemplary embodiment of the present invention. As shown in fig. 7, the apparatus 700 includes:
the judging module 710 is configured to judge whether any relay protection device that collects the same secondary voltage reports PT disconnection when any relay protection device that collects the secondary voltage reports PT disconnection;
the first determining module 720 is configured to determine whether the secondary voltage output measured at the PT terminal box is normal or not when the relay protection device collecting the same secondary voltage reports PT disconnection, and determine that a PT disconnection defect is PT to terminal box secondary circuit abnormality and PT failure if the secondary voltage output measured at the PT terminal box is abnormal;
the second determining module 730 is configured to determine whether the secondary voltage output measured at the PT terminal box is normal, and determine whether the secondary circuit from the PT terminal box to the parallel screen is abnormal and the secondary circuit from the auxiliary contact of the disconnecting link is abnormal if the secondary voltage output measured at the PT terminal box is normal and the secondary voltage of each section of bus is abnormal;
and a third determination module 740, configured to determine that the PT disconnection defect is a voltage parallel relay failure or a parallel secondary circuit abnormality when the heavy voltage of each bus is normal.
Optionally, the apparatus 700 further comprises:
the fourth judging module is used for judging whether the acquisition value of the relay protection device is consistent with the voltage before voltage switching or not under the condition that the relay protection device acquiring the same secondary voltage does not report PT disconnection, and judging that the PT disconnection defect is the loop abnormality from the PT terminal box to the voltage switching device under the condition that the acquisition value of the relay protection device is inconsistent with the voltage before voltage switching;
the fifth judging module is used for judging whether the back plate voltage of the protection device is consistent with the sampling voltage of the protection device or not under the condition that the acquired value of the relay protection device is consistent with the voltage before switching, and judging that the PT wire breakage defect is damage to the sampling plate or the CPU plate of the protection device under the condition that the back plate voltage of the protection device is inconsistent with the sampling voltage of the protection device;
the sixth judging module is used for judging whether the actual value of the relay protection device is consistent with the voltage after the voltage is switched or not under the condition that the back plate voltage of the protection device is consistent with the sampling voltage of the protection device, and judging that the PT wire breakage defect is abnormal in a secondary circuit after the voltage is switched under the condition that the actual value of the relay protection device is inconsistent with the voltage after the voltage is switched;
the seventh judging module is used for judging whether the open loop is abnormal or not under the condition that the actual adopted value of the relay protection device is consistent with the voltage after the voltage switching, judging whether the auxiliary contact of the disconnecting link is abnormal or not under the condition that the open loop is abnormal, and judging that the PT wire breakage defect is abnormal or virtual connection of the auxiliary contact of the disconnecting link under the condition that the auxiliary contact of the disconnecting link is abnormal;
the eighth judging module is used for judging whether the direct current secondary circuit is abnormal or not under the condition that the auxiliary contact point of the disconnecting link is not abnormal, and judging that the PT disconnection defect is abnormal in the direct current secondary circuit under the condition that the direct current secondary circuit is abnormal;
and the ninth judging module is used for judging that the PT disconnection defect is abnormal in the voltage switching device under the condition that the direct current secondary circuit is not abnormal.
Optionally, the apparatus 700 further comprises:
a tenth judging module, configured to judge whether the voltage switching circuit is abnormal if the open circuit is not abnormal, and judge that the PT disconnection defect is a virtual connection or an open circuit of the voltage switching circuit if the voltage switching circuit is abnormal;
and the eleventh judging module is used for judging that the PT disconnection defect is abnormal in the voltage switching device under the condition that the voltage switching circuit is not abnormal.
Optionally, the open loop exception comprises: and the condition that the switch relay acts simultaneously and no knife switch position indication exists in normal operation occurs.
Optionally, the direct current secondary loop anomaly includes: the direct current secondary circuit is miswired, the direct current secondary circuit is in virtual connection/open circuit, and the polarity of the direct current power supply is wrong.
Optionally, the voltage switching loop anomaly includes: the voltage switching loop is miswired and the voltage switching loop is virtually connected/opened.
Exemplary electronic device
Fig. 8 is a structure of an electronic device provided in an exemplary embodiment of the present invention. As shown in fig. 8, the electronic device 80 includes one or more processors 81 and memory 82.
The processor 81 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.
Memory 82 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that can be executed by the processor 81 to implement the methods of the software programs of the various embodiments of the present invention described above and/or other desired functions. In one example, the electronic device may further include: an input device 83 and an output device 84, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
In addition, the input device 83 may also include, for example, a keyboard, a mouse, and the like.
The output device 84 can output various information to the outside. The output means 84 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device relevant to the present invention are shown in fig. 8 for simplicity, components such as buses, input/output interfaces, etc. being omitted. In addition, the electronic device may include any other suitable components depending on the particular application.
Exemplary computer program product and computer readable storage Medium
In addition to the methods and apparatus described above, embodiments of the invention may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform steps in a method according to various embodiments of the invention described in the "exemplary methods" section of this specification.
The computer program product may write program code for performing operations of embodiments of the present invention in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the invention may also be a computer-readable storage medium, having stored thereon computer program instructions, which when executed by a processor, cause the processor to perform steps in a method according to various embodiments of the invention described in the "exemplary method" section of the description above.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present invention have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present invention are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present invention. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the invention is not necessarily limited to practice with the above described specific details.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, so that the same or similar parts between the embodiments are mutually referred to. For system embodiments, the description is relatively simple as it essentially corresponds to method embodiments, and reference should be made to the description of method embodiments for relevant points.
The block diagrams of the devices, systems, apparatuses, systems according to the present invention are merely illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, systems, apparatuses, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present invention are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
It is also noted that in the systems, devices and methods of the present invention, components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the invention to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (10)
1. A PT disconnection defect diagnosis method of a relay protection device is characterized by comprising the following steps:
judging whether any relay protection device collecting the same secondary voltage reports PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection;
under the condition that relay protection devices collecting the same secondary voltage report PT disconnection, judging whether secondary voltage output measured at a PT terminal box is normal or not, and if the secondary voltage output measured at the PT terminal box is abnormal, judging that the PT disconnection defect is PT to terminal box secondary circuit abnormality and PT fault;
if the secondary voltage output measured at the PT terminal box is normal, judging whether the heavy voltage of each section of bus is normal, and if the heavy voltage of each section of bus is abnormal, judging that the PT disconnection defect is abnormal from the PT terminal box to the parallel screen secondary circuit and the auxiliary contact heavy secondary circuit of the disconnecting link is abnormal;
and under the condition that the heavy voltage of each section of bus is normal, judging the PT disconnection defect as a voltage parallel relay fault and a parallel secondary circuit abnormality.
2. The method as recited in claim 1, further comprising:
judging whether the acquisition value of the relay protection device is consistent with the voltage before voltage switching under the condition that the relay protection device acquiring the same secondary voltage does not report PT disconnection, and judging that the PT disconnection defect is the loop abnormality from the PT terminal box to the voltage switching device under the condition that the acquisition value of the relay protection device is inconsistent with the voltage before voltage switching;
judging whether the back plate voltage of the protection device is consistent with the sampling voltage of the protection device or not under the condition that the acquisition value of the relay protection device is consistent with the voltage before voltage switching, and judging that the PT broken line defect is damage to a sampling plate or a CPU plate of the protection device under the condition that the back plate voltage of the protection device is inconsistent with the sampling voltage of the protection device;
judging whether the actual value of the relay protection device is consistent with the voltage after the voltage is switched or not under the condition that the back plate voltage of the protection device is consistent with the sampling voltage of the protection device, and judging that the PT wire breakage defect is abnormal in a secondary circuit after the voltage is switched under the condition that the actual value of the relay protection device is inconsistent with the voltage after the voltage is switched;
judging whether an open loop is abnormal or not under the condition that the actual adopted value of the relay protection device is consistent with the voltage after voltage switching, judging whether a disconnecting link auxiliary contact is abnormal or not under the condition that the open loop is abnormal, and judging that the PT wire breakage defect is abnormal or virtual connection of the disconnecting link auxiliary contact under the condition that the disconnecting link auxiliary contact is abnormal;
judging whether a direct current secondary circuit is abnormal or not under the condition that the auxiliary contact point of the disconnecting link is not abnormal, and judging that the PT wire breakage defect is abnormal in the direct current secondary circuit under the condition that the direct current secondary circuit is abnormal;
and under the condition that the direct current secondary circuit is not abnormal, judging that the PT disconnection defect is abnormal in the voltage switching device.
3. The method as recited in claim 2, further comprising:
judging whether a voltage switching circuit is abnormal or not under the condition that the open circuit is not abnormal, and judging that the PT disconnection defect is virtual connection or open circuit of the voltage switching circuit under the condition that the voltage switching circuit is abnormal;
and when the voltage switching loop is not abnormal, judging that the PT disconnection defect is abnormal in the voltage switching device.
4. A method according to any one of claims 2 or 3, wherein the open loop anomaly comprises: and the condition that the switch relay acts simultaneously and no knife switch position indication exists in normal operation occurs.
5. The method of claim 2, wherein the dc secondary loop anomaly comprises: the direct current secondary circuit is miswired, the direct current secondary circuit is in virtual connection/open circuit, and the polarity of the direct current power supply is wrong.
6. A method according to claim 3, wherein the voltage switching loop anomaly comprises: the voltage switching loop is miswired and the voltage switching loop is virtually connected/opened.
7. The utility model provides a relay protection device PT broken wire defect diagnostic device which characterized in that includes:
the judging module is used for judging whether the relay protection devices collecting the same secondary voltage report PT disconnection or not under the condition that any relay protection device collecting the secondary voltage reports PT disconnection;
the first judging module is used for judging whether the secondary voltage output measured at the PT terminal box is normal or not under the condition that the relay protection device collecting the same secondary voltage reports PT disconnection, and judging that the PT disconnection defect is PT to terminal box secondary circuit abnormality and PT fault if the secondary voltage output measured at the PT terminal box is abnormal;
the second judging module is used for judging whether the heavy voltage of each section of bus is normal or not if the secondary voltage output measured at the PT terminal box is normal, and judging that the PT disconnection defect is abnormal in secondary circuit from the PT terminal box to the parallel screen and abnormal in secondary circuit of the auxiliary contact point of the disconnecting link under the condition that the heavy voltage of each section of bus is abnormal;
and the third judging module is used for judging that the PT wire breakage defect is a voltage parallel relay fault and a parallel secondary circuit abnormality under the condition that the heavy voltage of each section of bus is normal.
8. The apparatus as recited in claim 7, further comprising:
the fourth judging module is used for judging whether the acquisition value of the relay protection device is consistent with the voltage before voltage switching or not under the condition that the relay protection device acquiring the same secondary voltage does not report PT disconnection, and judging that the PT disconnection defect is abnormal from a PT terminal box to a voltage switching device circuit under the condition that the acquisition value of the relay protection device is inconsistent with the voltage before voltage switching;
the fifth judging module is used for judging whether the back plate voltage of the protection device is consistent with the sampling voltage of the protection device or not under the condition that the acquired value of the relay protection device is consistent with the voltage before voltage switching, and judging that the PT broken line defect is damage to the sampling plate or the CPU plate of the protection device under the condition that the back plate voltage of the protection device is inconsistent with the sampling voltage of the protection device;
the sixth judging module is used for judging whether the actual value of the relay protection device is consistent with the voltage after the voltage is switched or not under the condition that the back plate voltage of the protection device is consistent with the sampling voltage of the protection device, and judging that the PT disconnection defect is abnormal in a secondary circuit after the voltage is switched under the condition that the actual value of the relay protection device is inconsistent with the voltage after the voltage is switched;
a seventh judging module, configured to judge whether an open loop is abnormal if the actual value of the relay protection device is consistent with the voltage after the voltage is switched, judge whether a disconnecting link auxiliary contact is abnormal if the open loop is abnormal, and judge that the PT disconnection defect is a disconnecting link auxiliary contact abnormality or a virtual connection if the disconnecting link auxiliary contact is abnormal;
the eighth judging module is used for judging whether the direct current secondary circuit is abnormal or not under the condition that the auxiliary contact point of the disconnecting link is not abnormal, and judging that the PT disconnection defect is abnormal in the direct current secondary circuit under the condition that the direct current secondary circuit is abnormal;
and the ninth judging module is used for judging that the PT disconnection defect is abnormal in the voltage switching device under the condition that the direct current secondary circuit is not abnormal.
9. A computer readable storage medium, characterized in that the storage medium stores a computer program for executing the method of any of the preceding claims 1-6.
10. An electronic device, the electronic device comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any of the preceding claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310156793.5A CN116699302A (en) | 2023-02-23 | 2023-02-23 | PT wire breakage defect diagnosis method, device and medium for relay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310156793.5A CN116699302A (en) | 2023-02-23 | 2023-02-23 | PT wire breakage defect diagnosis method, device and medium for relay protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116699302A true CN116699302A (en) | 2023-09-05 |
Family
ID=87829983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310156793.5A Pending CN116699302A (en) | 2023-02-23 | 2023-02-23 | PT wire breakage defect diagnosis method, device and medium for relay protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116699302A (en) |
-
2023
- 2023-02-23 CN CN202310156793.5A patent/CN116699302A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102930365B (en) | A kind of relay protection statistical analysis and the check method of operational management data | |
| CN110941918B (en) | Intelligent substation fault analysis system | |
| CN109962443B (en) | SCD-based protection, overhaul and safety measure automatic generation system and method | |
| CN109245300B (en) | Automatic checking method for 500kV intelligent substation pressure plate | |
| KR102527888B1 (en) | Smart switchboard management system | |
| KR102402548B1 (en) | An Automatic Monitoring and Analyzing Type of a Diagnosing System for a Protection System a Power Facility | |
| CN116699302A (en) | PT wire breakage defect diagnosis method, device and medium for relay protection device | |
| CN115980438A (en) | Method and system for acquiring double-bus electric energy metering voltage of transformer substation | |
| Udren et al. | Proposed statistical performance measures for microprocessor-based transmission-line protective relays. I. Explanation of the statistics | |
| CN106451760A (en) | Real-time telemetry information monitoring method for 500kV transformer station centralized control system | |
| CN115642701A (en) | State identification method of relay protection device and related device | |
| Zeng et al. | Reliability assessment on switchgear and its controller based on fault tree analysis | |
| CN112255481A (en) | Target equipment anti-error detection method and device, storage medium and electronic device | |
| CN107392449B (en) | Relay protection setting value list generation method and device | |
| CN112001588A (en) | Accident event online pre-judging method and device based on N-1 state | |
| CN116699376A (en) | Relay protection control loop disconnection defect diagnosis method, device, medium and equipment | |
| CN112305287A (en) | Anti-electricity-stealing management system and anti-electricity-stealing management method arranged at end tail of concentrator | |
| CN110851329A (en) | Machine room state diagnosis system and method | |
| KR100368260B1 (en) | A watching, checking and breakdown-analyzing apparatus for power system in a hot rolling process | |
| CN110889775A (en) | Key distribution equipment characteristic parameter system | |
| CN110991025A (en) | Method and device for checking potential safety hazards of power grid | |
| CN110493066A (en) | Substation's background monitoring communications trouble shoot method | |
| EP4050352B1 (en) | Open circuit fault management on overhead lines | |
| CN110768379B (en) | Method for deducing primary wiring diagram of field primary equipment by SCD virtual terminal | |
| Nordzi et al. | Real Time Electrical Transient Analyzer Program (ETAP RT) Improvement for Gas Processing & Utilities (GPU) plant, PETRONAS Gas Berhad |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |