CN112630584B - Generator terminal abnormality monitoring system and method and electronic equipment - Google Patents
Generator terminal abnormality monitoring system and method and electronic equipment Download PDFInfo
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- CN112630584B CN112630584B CN202011203300.1A CN202011203300A CN112630584B CN 112630584 B CN112630584 B CN 112630584B CN 202011203300 A CN202011203300 A CN 202011203300A CN 112630584 B CN112630584 B CN 112630584B
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
The application discloses a generator machine end abnormality monitoring system and method, electronic equipment and a computer readable storage medium, wherein the system comprises: each group of voltage transformers comprises three voltage transformers, and the three voltage transformers are used for respectively converting primary voltages output by a generator terminal to obtain three-phase secondary voltages, wherein the three-phase secondary voltages are synthesized to obtain opening triangular voltages corresponding to the group of voltage transformers; and the monitoring device is connected with the open triangular voltage corresponding to the at least one group of voltage transformers so as to monitor the abnormality of the generator end according to the correspondingly connected open triangular voltage. The application can improve the effectiveness of monitoring the abnormality of the generator end.
Description
Technical Field
The application relates to the technical field of generator safety, in particular to a generator end abnormality monitoring system and method, electronic equipment and a computer readable storage medium.
Background
At present, aiming at a generator protection system, a generator excitation system, an electrical measurement system and the like, whether the generator end is abnormal or not is generally determined by monitoring secondary disconnection of a voltage transformer (potential transformer, PT) for providing secondary voltage for the system. However, an effective monitoring means cannot be realized against the special phenomenon of slow melting of the high-voltage side fuse of the generator terminal PT. However, once the "slow melting" of the high-voltage side fuse of the generator terminal PT occurs, abnormal actions such as mismagnetization, electrical protection abnormality and electrical measurement misalignment of the automatic voltage regulator (automatic voltage regulator, AVR) will be caused, and when serious, the generator may trip.
How to provide a more effective generator end abnormality monitoring method to improve the reliability and safety of the generator set operation is a technical problem to be solved at present.
Disclosure of Invention
The embodiment of the application aims to provide a generator end abnormality monitoring system and method, electronic equipment and a computer readable storage medium, which are used for solving the problem of low effectiveness of generator end abnormality monitoring at present.
In order to solve the technical problems, the present specification is implemented as follows:
in a first aspect, a generator terminal anomaly monitoring system is provided, including:
each group of voltage transformers comprises three voltage transformers, and the three voltage transformers are used for respectively converting primary voltages output by a generator terminal to obtain three-phase secondary voltages, wherein the three-phase secondary voltages are synthesized to obtain opening triangular voltages corresponding to the group of voltage transformers;
and the monitoring device is connected with the open triangular voltage corresponding to the at least one group of voltage transformers so as to monitor the abnormality of the generator end according to the correspondingly connected open triangular voltage.
Optionally, the system comprises three groups of voltage transformers, each group of voltage transformers corresponds to one open delta voltage.
In a second aspect, a method for performing anomaly monitoring by using the generator-side anomaly monitoring system described in the first aspect is provided, including:
acquiring opening triangular voltages corresponding to the at least one group of voltage transformers;
comparing the opening triangular voltage with a first threshold value;
and when the opening triangular voltage exceeds the first threshold value, monitoring that the generator terminal is abnormal in voltage.
Optionally, the method further comprises:
comparing the opening triangular voltage with a second threshold value;
when the opening triangle voltage exceeds the second threshold value, monitoring that the voltage transformer is abnormal in high-voltage fuse blowing or secondary circuit wire breakage, wherein,
the second threshold is greater than the first threshold.
Optionally, the at least one set of voltage transformers includes three sets of voltage transformers, and the method further includes:
and monitoring that the voltage transformer is abnormal due to slow melting of the high-voltage fuse under the condition that three opening triangular voltages corresponding to the three groups of voltage transformers do not all exceed the first threshold value and any opening triangular voltage exceeds the first threshold value.
Optionally, the method further comprises:
and monitoring that the generator end is normal when the three opening triangular voltages corresponding to the three groups of voltage transformers do not exceed the first threshold value.
Optionally, the method further comprises:
and sending the abnormal monitoring result to a generator protection system, a generator excitation system and/or an electrical measurement system, which are provided with secondary voltage by the voltage transformer, so that the generator protection system, the generator excitation system and/or the electrical measurement system perform action adjustment according to the abnormal monitoring result.
Optionally, the first threshold is 2-4V and/or the second threshold is 14-16V.
In a third aspect, there is provided an electronic device comprising a processor and a processor electrically connected to the memory, the memory storing a computer program executable by the processor to perform the steps of the method according to the second aspect.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to the second aspect.
In the embodiment of the application, the corresponding opening triangular voltage is obtained through at least one group of voltage transformers, and the opening triangular voltage is connected with the monitoring device, so that the abnormality of the generator end can be monitored according to the corresponding connected opening triangular voltage. According to the logic relation of the opening triangle voltage and different preset threshold values, various abnormal conditions of the generator end can be comprehensively and effectively monitored, and the running reliability and safety of the generator set are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic structural diagram of a generator end abnormality monitoring system according to an embodiment of the present application.
Fig. 2 is a flow chart of a method for monitoring abnormality of a generator terminal according to a first embodiment of the present application.
Fig. 3 is a flowchart of a generator end anomaly monitoring method according to a second embodiment of the present application.
Fig. 4 is a schematic diagram of a logic action of a generator end anomaly monitoring method according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. The reference numerals in the present application are only used for distinguishing the steps in the scheme, and are not used for limiting the execution sequence of the steps, and the specific execution sequence controls the description in the specification.
In order to solve the problems in the prior art, an embodiment of the present application provides a generator end anomaly monitoring system, including:
each group of voltage transformers comprises three voltage transformers, and the three voltage transformers are used for respectively converting primary voltages output by a generator terminal to obtain three-phase secondary voltages, wherein the three-phase secondary voltages are synthesized to obtain triangular opening voltages corresponding to the group of voltage transformers;
and the monitoring device is connected with the triangular opening voltage corresponding to the at least one group of voltage transformers so as to monitor the abnormality of the generator end according to the correspondingly connected triangular opening voltage.
The voltage transformer is used for converting strong current of the primary voltage into weak current and providing secondary voltage, and the provided secondary voltage can be selected and used by an engine protection system, a generator excitation system, an electrical measurement system and the like.
Each group of voltage transformers PT is provided with three voltage transformers, each voltage transformer provides one phase of voltage, so that one group PT provides three phases of secondary voltages, and at least one phase of secondary voltage in the three phases of secondary voltages is provided for the system to use. The three-phase secondary voltage of each group PT is vector synthesized to obtain an open triangular voltage 3U, and the value of the vector synthesized open triangular voltage 3U is close to 0 under the condition that no abnormality exists at the generator end.
In one embodiment, the generator-side abnormality monitoring system includes three sets of PTs, each set of PTs corresponding to one open delta voltage, and the three sets of PTs provide three open delta voltages.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a generator end abnormality monitoring system according to an embodiment of the present application. In this embodiment, the generator-side abnormality monitoring system 1 includes three sets of voltage transformers 12,14,16, each set corresponding to an open delta voltage.
As shown in fig. 1, the generator terminal device 20 outputs a primary voltage, and three groups of voltage transformers 12,14,16 respectively convert the primary voltage to obtain a three-phase composite secondary voltage, and the three secondary voltages are provided to the monitoring device 18, and the monitoring device 18 monitors the three secondary voltages in real time and determines to perform abnormality monitoring of the generator terminal.
The abnormality of the generator terminal with respect to the monitoring device monitoring the generator terminal according to the opening triangle voltage of the corresponding connection will be described later.
According to the system for monitoring the abnormality of the generator terminal with the structure, the embodiment of the application also provides a method for monitoring the abnormality of the generator terminal by the system, as shown in fig. 2, fig. 2 is a schematic flow chart of the method for monitoring the abnormality of the generator terminal according to the first embodiment of the application.
As shown in fig. 2, the method for monitoring the abnormality of the generator terminal according to the first embodiment of the present application includes the following steps:
102, acquiring opening triangular voltages corresponding to at least one group of voltage transformers;
step 104, comparing the opening triangular voltage with a first threshold value;
and step 106, monitoring that the generator terminal is abnormal in voltage when the opening triangular voltage exceeds the first threshold value.
The method can be executed by the monitoring device of the generator end abnormality monitoring system.
The first threshold is a predetermined voltage value, for example, the first threshold is 2-4V. As described above, the open delta voltage of each group of voltage transformers is normally a value close to 0, and in step 106, if the voltage transformers with the open delta voltage exceeding the first threshold are compared, the voltage abnormality at the generator terminal is monitored. If the generator terminal abnormality monitoring system comprises two or more groups of voltage transformers, the generator terminal is monitored to have voltage abnormality as long as the opening triangular voltage corresponding to any group of voltage transformers exceeds a first threshold, and at the moment, generator terminal voltage abnormality alarm can be further sent out to remind related personnel to check and maintain generator terminal equipment.
Based on the solution provided in the foregoing embodiment, optionally, as shown in fig. 3, the foregoing anomaly monitoring method further includes the following steps:
step 204, comparing the opening triangle voltage with a second threshold value;
and step 206, monitoring that the voltage transformer is abnormal in high-voltage fuse blowing or secondary loop wire breakage when the opening triangular voltage exceeds the second threshold, wherein the second threshold is larger than the first threshold.
The second threshold is also a predetermined voltage value, for example, the second threshold is 14-16V. In step 206, if the voltage transformer with the open delta voltage exceeding the second threshold is compared, it is monitored that the voltage transformer has a high voltage fuse blowing abnormality or a secondary loop disconnection abnormality. Similarly, if the generator terminal abnormality monitoring system comprises two or more groups of voltage transformers, if the opening triangle voltage corresponding to any group of voltage transformers exceeds a second threshold value, the monitoring voltage transformer has high-voltage fuse blowing abnormality or secondary circuit disconnection abnormality, and at the moment, the high-voltage fuse blowing abnormality alarm or secondary circuit disconnection abnormality alarm of the voltage transformer can be further sent.
Based on the solution provided in the foregoing embodiment, optionally, the at least one set of voltage transformers includes three sets of voltage transformers, and the method further includes:
and monitoring that the voltage transformer is abnormal due to slow melting of the high-voltage fuse under the condition that three opening triangular voltages corresponding to the three groups of voltage transformers do not all exceed the first threshold value and any opening triangular voltage exceeds the first threshold value.
According to the monitoring and judging results of the abnormal voltages of several different secondary voltages, different alarm signals can be sent to relevant personnel to clearly remind or instruct the relevant personnel to use, and timely abnormal fault checking or eliminating actions are carried out, so that the running reliability and safety of the generator set are improved.
Furthermore, optionally, the method further comprises:
and monitoring that the generator end is normal when the three opening triangular voltages corresponding to the three groups of voltage transformers do not exceed the first threshold value.
Referring to fig. 4, fig. 4 is a schematic diagram of a logic operation of a generator end anomaly monitoring method according to an embodiment of the present application.
In this embodiment, the first threshold is set to 3V and the second threshold is set to 15V. The voltage transformer for providing the secondary voltage comprises three groups of TV01, TV02 and TV03, and the opening triangular voltages corresponding to the three groups of voltage transformers which are accessed by the monitoring device are respectively 3U 01 、3U 02 、3U 03 。
In FIG. 4, ". Gtoreq.1" indicates the presence of any one of the opening triangle voltages 3U greater than a predetermined threshold. If there is 3U as shown in FIG. 4 01 >3V，3U 02 >3V, and/or 3U 03 >3V, monitoring the voltage abnormality of the machine terminal. If there is 3U 01 >15V，3U 02 >15V, and/or 3U 03 >15V, the PT high-pressure melting at the machine end is monitoredAbnormal wire fusing or abnormal secondary circuit breakage.
In FIG. 4, "&"means and", ". "means" NOT ", so if triangular voltage 3U is found at three openings 01 、3U 02 、3U 03 And if the voltage does not exceed the first threshold value 3V and any opening triangular voltage 3U exceeds the first threshold value 3V, monitoring the abnormal slow melting of the PT high-voltage fuse at the machine end.
In one embodiment, optionally, the method further comprises:
and sending the abnormal monitoring result to a generator protection system, a generator excitation system and/or an electrical measurement system, which are provided with secondary voltage by the voltage transformer, so that the generator protection system, the generator excitation system and/or the electrical measurement system perform action adjustment according to the abnormal monitoring result.
According to the technical scheme provided by the embodiment of the application, through introducing the open triangular voltage of the voltage transformer and carrying out secondary voltage abnormality real-time monitoring on the open triangular voltage, the abnormality of the generator end is monitored, and the open triangular voltage monitoring device has the advantages of simple structure and convenience in manufacture and installation, and can reliably and effectively discover the abnormal faults of the generator end.
The embodiment of the application can monitor the abnormal phenomena of slow melting of the PT high-voltage side fuse of the generator, the fusing of the PT high-voltage side fuse or the disconnection of the PT secondary circuit, abnormal voltage at the generator end and the like, and achieves the purpose of comprehensively judging the abnormal secondary voltage at the generator end, in particular to reflecting the slow melting of the PT high-voltage side fuse at the generator end.
The abnormal monitoring signals are provided for the generator protection system, the generator excitation system and/or the electrical measurement system for use, so that the system can perform action adjustment, and error protection actions, error magnetization actions and/or error measurement results caused by the abnormality are timely avoided, and the stability of safe operation of the unit is improved.
In addition, according to the monitoring and determining results of different anomalies, different alarm signals can be sent to related personnel to be used for determining the types of the anomalies, and corresponding inspection or maintenance is carried out, so that the reliability and safety of the operation of the unit can be further improved.
Optionally, the embodiment of the present application further provides an electronic device, and fig. 5 is a schematic structural diagram of the electronic device according to the embodiment of the present application.
As shown in fig. 5, the electronic device 2000 includes a memory 2200 and a processor 2400 electrically connected to the memory 2200, where the memory 2200 stores a computer program that can be executed by the processor 2400, and the computer program implements each process of any one of the foregoing method embodiments for monitoring a generator terminal abnormality when executed by the processor 2400, and can achieve the same technical effect, so that repetition is avoided and redundant description is omitted herein.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of any one of the foregoing method embodiments for monitoring the abnormality of the generator terminal, and can achieve the same technical effect, so that repetition is avoided and redundant description is omitted. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (7)
1. The method is applied to a generator terminal abnormality monitoring system, and comprises three groups of voltage transformers, wherein each group of voltage transformers comprises three voltage transformers which are used for respectively converting primary voltages output by a generator terminal to obtain three-phase secondary voltages, and each group of three-phase secondary voltages are synthesized to obtain opening triangular voltages corresponding to the group of voltage transformers; the monitoring device is connected with the opening triangle voltage corresponding to the three groups of voltage transformers, so as to monitor the abnormity of the generator terminal according to the opening triangle voltage corresponding to the connection, and is characterized by comprising:
acquiring opening triangular voltages corresponding to the three groups of voltage transformers;
comparing the opening triangular voltage with a first threshold value;
when any one of the opening triangular voltages exceeds the first threshold value, monitoring that the generator terminal is abnormal in voltage;
comparing the opening triangular voltage with a second threshold value;
when the opening triangle voltage exceeds the second threshold value, monitoring that the voltage transformer is abnormal in high-voltage fuse blowing or secondary circuit wire breakage, wherein,
the second threshold is greater than the first threshold.
2. The method of claim 1, wherein the method further comprises:
and monitoring that the voltage transformer is abnormal due to slow melting of the high-voltage fuse under the condition that three opening triangular voltages corresponding to the three groups of voltage transformers do not all exceed the first threshold value and any opening triangular voltage exceeds the first threshold value.
3. The method of claim 2, wherein the method further comprises:
and monitoring that the generator end is normal when the three opening triangular voltages corresponding to the three groups of voltage transformers do not exceed the first threshold value.
4. A method as claimed in any one of claims 1 to 3, further comprising:
and sending the abnormal monitoring result to a generator protection system, a generator excitation system and/or an electrical measurement system, which are provided with secondary voltage by the voltage transformer, so that the generator protection system, the generator excitation system and/or the electrical measurement system perform action adjustment according to the abnormal monitoring result.
5. The method of claim 1, wherein the first threshold is 2-4V and/or the second threshold is 14-16V.
6. An electronic device, comprising: a memory and a processor electrically connected to the memory, the memory storing a computer program executable by the processor, the computer program implementing the steps of the method of any one of claims 1 to 5 when executed by the processor.
7. A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 5.
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