CN117686783B - High-voltage cable grounding current on-line monitoring device based on load dynamic management - Google Patents
High-voltage cable grounding current on-line monitoring device based on load dynamic management Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention provides a high-voltage cable grounding current on-line monitoring device based on load dynamic management, which comprises: the data acquisition module acquires working parameters of the high-voltage cable and the grounding wire; the current effective value module is used for determining the effective values of the high-voltage cable current and the grounding wire current; the ground wire monitoring and scoring module is used for determining the ground wire monitoring and scoring; the power device module is used for determining the temperature and vibration change of the high-voltage cable power device; the power device monitoring and scoring module is used for determining the monitoring and scoring of the high-voltage cable power device; the partial discharge wave recording signal module is used for obtaining a partial discharge wave recording signal; the partial discharge wave recording monitoring scoring module is used for determining partial discharge wave recording monitoring scoring; a determination module that determines whether to generate an alert; and an alarm module for providing at least one of a cable current abnormality alarm, an equipment state alarm and a ground line alarm when the generation of the alarm is determined. By adopting the device, the workload and the expenditure of daily maintenance of the cable can be reduced.
Description
Technical Field
The invention relates to the technical field of cable safety, in particular to a high-voltage cable grounding current on-line monitoring device based on load dynamic management.
Background
In the related art, with the high-speed development of power grid construction, the power cable is more and more widely used, and the requirements for performance monitoring and historical data collection of a newly built cable are more and more increased. Meanwhile, the cable laid in early stage is continued to be in normal service life, and the insulation problem of the cable is increased increasingly, so that a complete cable performance monitoring system is required for the power system, and the high-voltage cable grounding current on-line monitoring device is one of the systems.
The information disclosed in the background section of the application is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a high-voltage cable grounding current on-line monitoring device based on load dynamic management, which can accurately and timely know the insulation state of a power cable, greatly reduces the workload and the expenditure of daily maintenance, and simultaneously accumulates precious historical data for long-term operation of the on-line monitoring device to provide data resources for power system staff to carry out system evaluation on a power grid transmission line.
According to a first aspect of an embodiment of the present invention, there is provided a high-voltage cable ground current online monitoring device for load dynamic management, including:
The data acquisition module is used for acquiring working parameters of the high-voltage cable and working parameters of the grounding wire through data acquisition equipment;
the current effective value module is used for determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
the ground wire monitoring and scoring module is used for determining a ground wire monitoring and scoring according to the ground wire current effective value and the high-voltage cable current effective value;
The power device module is used for determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
The power device monitoring and scoring module is used for determining the monitoring and scoring of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
The partial-discharge wave recording signal module is used for obtaining a high-frequency partial-discharge wave recording signal of the high-voltage cable according to the working parameters of the high-voltage cable;
The partial discharge wave recording monitoring scoring module is used for determining partial discharge wave recording monitoring scoring according to the high-frequency partial discharge wave recording signals of the high-voltage cable;
The determining module is used for determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
and an alarm module for providing at least one of a cable current abnormality alarm, an equipment state alarm and a ground line alarm when the generation of the alarm is determined.
According to one embodiment of the invention, the data acquisition device acquires the working parameters of the high-voltage cable and the working parameters of the grounding wire, and the data acquisition device comprises:
Through data acquisition equipment, gather the operating parameter of high tension cable and the operating parameter of earth connection, the operating parameter of high tension cable includes: the high-voltage cable current signal, the high-voltage cable high-frequency partial discharge signal, the cable joint and the skin temperature vibration signal, and the working parameters of the grounding wire comprise: and grounding the line current signal.
According to one embodiment of the present invention, determining a ground wire monitoring score according to the ground wire current effective value and the high voltage cable current effective value includes:
According to the formula
D0＝σ(I2-aI1)
Determining a ground wire monitoring score D 0, wherein I 1 is a high-voltage cable current effective value, I 2 is a ground wire current effective value, σ is a preset ground wire monitoring weight, σ >0, a is a constant, and a=0.85.
According to one embodiment of the present invention, determining a high voltage cable power device monitoring score from a temperature and a vibration frequency of the high voltage cable power device includes:
According to the formula
D1＝β1T+β2H
Obtaining a high-voltage cable power device monitoring score D 1, wherein T is a temperature monitoring result, H is a vibration frequency, beta 1、β2 is a preset power device monitoring weight, beta 1、β2 is larger than 0, and
According to one embodiment of the present invention, determining a partial discharge recording monitoring score according to the high-frequency partial discharge recording signal of the high-voltage cable includes:
According to the formula
D2＝|θ1(M-m)|+|θ2(U-u)|
Determining a partial discharge recording monitoring score D 2, wherein M is the amplitude of a partial discharge recording signal, M is a standard amplitude, U is the phase of a vibration partial discharge recording signal, U is a standard phase, theta 1、θ2 is a preset partial discharge recording monitoring weight, and theta 1、θ2 is larger than 0.
According to one embodiment of the present invention, determining whether to generate an alarm according to the partial discharge record monitoring score, the high-voltage cable power device monitoring score, and the ground wire monitoring score includes:
and when scores larger than 0 exist in the ground wire monitoring score D 0, the high-voltage cable power device monitoring score D 1 and the partial discharge wave recording monitoring score D 2, an alarm is generated.
According to one embodiment of the present invention, in the event that it is determined to generate an alarm, providing at least one of a cable current abnormality alarm, a device status alarm, and a ground line alarm includes:
Providing a ground wire alert when the ground wire monitor score D 0 is greater than 0;
providing an equipment status alert when the high voltage cable power plant monitoring score D 1 is greater than 0;
When the partial discharge record monitoring score D 2 is larger than 0, a cable current abnormality alarm is provided.
According to a second aspect of the embodiment of the present invention, there is provided a high voltage cable ground current monitoring method based on load dynamic management, including:
Collecting working parameters of the high-voltage cable and working parameters of the grounding wire through data collecting equipment;
Determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
determining a ground wire monitoring score according to the ground wire current effective value and the high-voltage cable current effective value;
Determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
determining a monitoring score of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
according to the working parameters of the high-voltage cable, obtaining a high-frequency partial discharge wave recording signal of the high-voltage cable;
Determining a partial discharge wave recording monitoring score according to the high-frequency partial discharge wave recording signal of the high-voltage cable;
determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
in the event that an alert is determined to be generated, at least one of a cable current anomaly alert, a device status alert, and a ground line alert is provided.
According to a third aspect of embodiments of the present invention, there is provided a high voltage cable ground current monitoring apparatus based on load dynamic management, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored by the memory to perform the high voltage cable ground current monitoring method based on load dynamic management.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the load dynamic management based high voltage cable ground current monitoring method.
According to the high-voltage cable grounding current monitoring device based on the dynamic load management, when the high-voltage cable grounding current is monitored, the high-voltage cable grounding current monitoring device can be divided into four steps, namely, the grounding wire monitoring score is determined according to the grounding wire current effective value and the high-voltage cable current effective value; determining a monitoring score of the high-voltage cable power device according to the temperature and the vibration frequency of the high-voltage cable power device; determining a partial discharge wave recording monitoring score according to the high-frequency partial discharge wave recording signal of the high-voltage cable; determining whether to generate an alarm according to the partial discharge wave recording monitoring score, the high-voltage cable power device monitoring score and the ground wire monitoring score, determining the type of the generated alarm according to the specific scores of the partial discharge wave recording monitoring score, the high-voltage cable power device monitoring score and the ground wire monitoring score after determining to generate the alarm, and generating the alarm of the corresponding type when a certain item score is larger than zero. The invention can accurately and timely know the insulation state of the power cable, greatly reduces the workload and the expenditure of daily maintenance, and simultaneously accumulates precious historical data for long-term operation of the on-line monitoring device to provide data resources for power system staff to carry out system evaluation on the power transmission line of the power grid.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the solutions of the prior art, the drawings which are necessary for the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments may be obtained from these drawings without inventive effort to a person skilled in the art,
FIG. 1 schematically illustrates a block diagram of a high voltage cable ground current monitoring device based on dynamic load management in accordance with an embodiment of the present invention;
FIG. 2 schematically illustrates a flow chart of a high voltage cable ground current monitoring method based on dynamic load management according to an embodiment of the invention;
fig. 3 schematically illustrates a structural diagram of a high-voltage cable grounding current monitoring system based on dynamic load management according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 schematically illustrates a block diagram of a high voltage cable ground current monitoring device based on dynamic load management according to an embodiment of the present invention, the device comprising:
The data acquisition module is used for acquiring working parameters of the high-voltage cable and working parameters of the grounding wire through data acquisition equipment;
the current effective value module is used for determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
the ground wire monitoring and scoring module is used for determining a ground wire monitoring and scoring according to the ground wire current effective value and the high-voltage cable current effective value;
The power device module is used for determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
The power device monitoring and scoring module is used for determining the monitoring and scoring of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
The partial-discharge wave recording signal module is used for obtaining a high-frequency partial-discharge wave recording signal of the high-voltage cable according to the working parameters of the high-voltage cable;
The partial discharge wave recording monitoring scoring module is used for determining partial discharge wave recording monitoring scoring according to the high-frequency partial discharge wave recording signals of the high-voltage cable;
The determining module is used for determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
and an alarm module for providing at least one of a cable current abnormality alarm, an equipment state alarm and a ground line alarm when the generation of the alarm is determined.
According to one embodiment of the invention, in the data acquisition module, the operating parameters of the high-voltage cable and the operating parameters of the ground wire are acquired by the data acquisition device.
According to one embodiment of the invention, the data acquisition device acquires the working parameters of the high-voltage cable and the working parameters of the grounding wire, and the data acquisition device comprises:
Through data acquisition equipment, gather the operating parameter of high tension cable and the operating parameter of earth connection, the operating parameter of high tension cable includes: the high-voltage cable current signal, the high-voltage cable high-frequency partial discharge signal, the cable joint and the skin temperature vibration signal, and the working parameters of the grounding wire comprise: and grounding the line current signal.
For example, a high-voltage cable current signal is collected through a high-voltage cable current measurement transformer, a ground wire current signal is collected through a ground wire current measurement transformer, a cable high-frequency partial discharge signal is collected through an HFCT sensor, and a cable joint and a skin temperature vibration signal are collected through a temperature vibration sensor.
According to one embodiment of the invention, in the current effective value module, a high-voltage cable current effective value and a ground wire current effective value are determined according to the working parameters of the high-voltage cable and the working parameters of the ground wire.
According to one embodiment of the invention, in the ground wire monitoring and scoring module, a ground wire monitoring and scoring is determined according to the ground wire current effective value and the high-voltage cable current effective value.
For example, when the power cable above 66KV is mostly a single-core cable, if two ends of the metal sheath are directly grounded after being three-phase interconnected, when the cable core passes through the current, the induced voltage generated on the metal sheath causes the induced circulation on the metal sheath due to the electromagnetic induction of the conductor current, the circulation on the metal sheath of the single-core cable is extremely small under normal conditions (namely, one point is grounded), the main circulation is capacitive current, once the metal sheath forms a loop with the earth, the circulation is obviously increased, and can reach more than 90% of the main current when serious, the equipment collects and measures the effective values of the grounding wire current and the high-voltage cable current, and determines whether the multi-point grounding of the metal sheath of the single-core cable has faults according to the effective values of the grounding wire current and the high-voltage cable current.
According to one embodiment of the present invention, determining a ground wire monitoring score according to the ground wire current effective value and the high voltage cable current effective value includes:
the ground wire monitoring score D 0 is determined according to equation (1),
D0=σ(I2-aI1) (1)
Wherein I 1 is a high-voltage cable current effective value, I 2 is a ground wire current effective value, σ is a preset ground wire monitoring weight, σ >0, a is a constant, and a=0.85.
For example, I 1 is a high-voltage cable current effective value, I 2 is a ground line current effective value, (I 2-aI1) represents a deviation of ninety percent of the ground line current effective value from the high-voltage cable current effective value, when the deviation is greater than 0, it represents that the circulation in the ground line exceeds a normal value, that is, a fault occurs, the ground line monitoring score D 0 is also greater than 0, and when the deviation is less than 0, it represents that the circulation in the ground line is within a normal value range, and the ground line monitoring score D 0 is also less than 0.
By the method, whether the circulation in the grounding wire is abnormal or not can be judged through the relation between the grounding wire current and the effective value of the high-voltage cable current, and whether the multipoint grounding of the metal sheath of the single-core cable is faulty or not can be further determined.
According to one embodiment of the invention, in the power device module, the temperature and vibration variation of the high voltage cable power device is determined based on the operating parameters of the high voltage cable.
According to one embodiment of the invention, in the power device monitoring scoring module, a high voltage cable power device monitoring score is determined based on the temperature and vibration changes of the high voltage cable power device.
For example, an increase in temperature may cause the insulating material to burn or melt at the discharge point. The temperature rise also causes thermal cracking or promotes oxidative cracking, while the temperature rise also increases the conductance and loss of the medium, thereby producing a deterioration cycle, resulting in the insulation state of the cable being destroyed.
According to one embodiment of the present invention, determining a high voltage cable power device monitoring score from a temperature and a vibration frequency of the high voltage cable power device includes:
obtaining a high-voltage cable power device monitoring score D 1 according to formula (2),
D1＝β1T+β2H(2)
Wherein T is the temperature monitoring result, H is the vibration frequency, beta 1、β2 is the monitoring weight of the preset power device, beta 1、β2 is larger than 0, and
For example, T is a temperature monitoring result, H is a vibration frequency, when the temperature monitoring result and the vibration frequency are both within the normal range, T, H is 0, D 1＝β1T+β2 H, that is, the high-voltage cable power device monitoring score D 1 is 0, which represents that the high-voltage cable power device is in a normal state, when the temperature monitoring result and the vibration frequency exceed the preset threshold value, only T, H is 1, at this time, the high-voltage cable power device monitoring score D 1 is greater than 0, which represents that the high-voltage cable power device is in an abnormal state.
Through the mode, the working state of the high-voltage cable power device is visually displayed in a scoring mode, when the score is equal to 0, the power device is in a normal state, and when the score is greater than 0, workers are reminded that the power device is in an abnormal state and needs to be processed.
According to one embodiment of the invention, in the partial discharge recording signal module, a partial discharge recording monitoring score is determined according to the high-frequency partial discharge recording signal of the high-voltage cable.
For example, partial discharge is a main cause of dielectric breakdown of a power cable, firstly, in the process of partial discharge, ionized electrons and positive and negative ions have large energy under the action of electric field force, and when the electrons and the positive and negative ions collide with an insulating wall of an air washer in insulation, chemical bonds of high polymers of the insulating material are broken sufficiently to generate a cracking high-voltage cable; secondly, during partial discharge, many active products are generated, which corrode the insulator, so that the dielectric properties are deteriorated; meanwhile, partial discharge is possible to generate X rays and Y rays, and the two rays have high energy and can promote polymer cracking; when partial discharge occurs, a partial discharge signal is generated, and the monitoring of the partial discharge state is realized through the monitoring of the partial discharge signal.
According to one embodiment of the present invention, determining a partial discharge recording monitoring score according to the high-frequency partial discharge recording signal of the high-voltage cable includes:
Determining a partial discharge record monitoring score D 2 according to the formula (3),
D2＝|θ1(m-M)|+|θ2(u-U)| (3)
Wherein M is the amplitude of the partial discharge recording signal, M is the standard amplitude, U is the phase of the vibration partial discharge recording signal, U is the standard phase, θ 1、θ2 is the preset partial discharge recording monitoring weight, and θ 1、θ2 is larger than 0.
For example, M is the amplitude of the partial discharge recorded signal, M is the standard amplitude, |θ 1 (M-M) | indicates that the obtained value is greater than 0 when the monitored amplitude is not coincident with the standard amplitude, |θ 2 (U-U) | indicates that the obtained value is greater than 0 when the monitored phase is not coincident with the standard phase, the partial discharge recorded monitoring score D 2＝|θ1(m-M)|+|θ2 (U-U) | is determined, D 2 is 0 when the monitored phase and amplitude are coincident with the standard phase and amplitude, and D 2 is greater than 0 when the monitored phase and amplitude are not coincident with the standard phase and amplitude, i.e., partial discharge is abnormal.
Through the mode, the partial discharge state can be intuitively judged through the scoring mode, and when the partial discharge record monitoring score D 2 is larger than 0, the abnormality occurs and the staff is required to be reminded to process.
According to one embodiment of the invention, in the determining module, whether an alarm is generated is determined according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage electric power device monitoring score.
According to one embodiment of the present invention, determining whether to generate an alarm according to the partial discharge record monitoring score, the high-voltage cable power device monitoring score, and the ground wire monitoring score includes:
and when scores larger than 0 exist in the ground wire monitoring score D 0, the high-voltage cable power device monitoring score D 1 and the partial discharge wave recording monitoring score D 2, an alarm is generated.
According to one embodiment of the invention, in the alarm module, in case it is determined to generate an alarm, at least one of a cable current abnormality alarm, an equipment status alarm, and a ground line alarm is provided.
According to one embodiment of the present invention, in the event that it is determined to generate an alarm, providing at least one of a cable current abnormality alarm, a device status alarm, and a ground line alarm includes:
Providing a ground wire alert when the ground wire monitor score D 0 is greater than 0;
providing an equipment status alert when the high voltage cable power plant monitoring score D 1 is greater than 0;
When the partial discharge record monitoring score D 2 is larger than 0, a cable current abnormality alarm is provided.
For example, when the ground wire monitor score D 0 is greater than 0, an abnormality occurs in the amount of current in the ground wire, which requires the ground wire alarm to be provided; when the monitoring score D 1 of the high-voltage cable power device is larger than 0, representing that the working state of the power device is abnormal, and providing an equipment state alarm; when the partial discharge record monitoring score D 2 is greater than 0, it represents a partial abnormal discharge, and a cable current abnormal alarm needs to be provided.
According to the high-voltage cable grounding current monitoring device based on the dynamic load management, when the high-voltage cable grounding current is monitored, the high-voltage cable grounding current monitoring device can be divided into four steps, namely, the grounding wire monitoring score is determined according to the grounding wire current effective value and the high-voltage cable current effective value; determining a monitoring score of the high-voltage cable power device according to the temperature and the vibration frequency of the high-voltage cable power device; determining a partial discharge wave recording monitoring score according to the high-frequency partial discharge wave recording signal of the high-voltage cable; determining whether to generate an alarm according to the partial discharge wave recording monitoring score, the high-voltage cable power device monitoring score and the ground wire monitoring score, determining the type of the generated alarm according to the specific scores of the partial discharge wave recording monitoring score, the high-voltage cable power device monitoring score and the ground wire monitoring score after determining to generate the alarm, and generating the alarm of the corresponding type when a certain item score is larger than zero. The invention can accurately and timely know the insulation state of the power cable, greatly reduces the workload and the expenditure of daily maintenance, and simultaneously accumulates precious historical data for long-term operation of the on-line monitoring device to provide data resources for power system staff to carry out system evaluation on the power transmission line of the power grid.
Fig. 2 schematically illustrates a method for monitoring a high voltage cable ground current based on dynamic load management according to an embodiment of the invention, the method comprising:
S101, collecting working parameters of a high-voltage cable and working parameters of a grounding wire through data collecting equipment;
S102, determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
S103, determining a ground wire monitoring score according to the ground wire current effective value and the high-voltage cable current effective value;
S104, determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
S105, determining a monitoring score of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
S106, obtaining a high-frequency partial discharge wave recording signal of the high-voltage cable according to the working parameters of the high-voltage cable;
S107, determining a partial discharge wave recording monitoring score according to the high-frequency partial discharge wave recording signal of the high-voltage cable;
S108, determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
S109, when it is determined to generate an alarm, providing at least one of a cable current abnormality alarm, an equipment state alarm, and a ground line alarm.
Fig. 3 schematically illustrates a structural diagram of a high voltage cable ground current monitoring system based on dynamic load management according to an embodiment of the present invention, the system comprising:
The system mainly comprises an induction power-taking current transformer, a high-voltage cable current measurement transformer, a grounding wire current measurement transformer, an HFCT sensor, a temperature vibration sensor, a collection unit, a 3G (or optical fiber) communication network, a background server and client software parts.
The induction power-taking current transformer can be used for collecting energy on the high-voltage cable under the condition that a convenient power supply cannot be provided on site, and provides current required by operation for the collecting unit;
The high-voltage cable current measurement transformer is responsible for collecting high-voltage cable current signals;
the grounding wire current measurement transformer is responsible for collecting grounding wire current signals;
the HFCT sensor is used for collecting cable high-frequency partial discharge signals;
The temperature vibration sensor is used for collecting temperature vibration signals of the cable joint and the skin;
the acquisition unit adopts a true effective value calculation method to measure the signals of the current transformer, calculates the on-site grounding current and the high-voltage cable current data, and simultaneously acquires the cable partial discharge signals and the temperature vibration signals. And transmitting the data to the network through a wireless or optical fiber interface;
The 3G communication network is mainly used for establishing a communication channel between the background and the field acquisition unit through the network of an operator by using a payment network provided by a wireless operator (mobile, communication and telecommunication).
The background server and the hardware platform of background service software;
The client software collects the data, establishes a history data file, and draws the data into various curves, and cable operation maintenance personnel can know the long-term operation state of the whole cable according to the information provided by the curves. At the same time, the background service program provides an alarm signal.
According to an embodiment of the present invention, there is provided a control apparatus for constructing an optimized energy apparatus based on a big data model, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored by the memory to perform the high voltage cable ground current monitoring method based on load dynamic management.
According to one embodiment of the present invention, a computer-readable storage medium is provided, on which computer program instructions are stored, which when executed by a processor implement the high-voltage cable ground current monitoring method based on load dynamic management.
The present invention may be a method, apparatus, system, and/or computer program product. The computer program product may include a computer readable storage medium having computer readable program instructions embodied thereon for performing various aspects of the present invention.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (9)
1. High-voltage cable grounding current on-line monitoring device based on load dynamic management, characterized by comprising:
The data acquisition module is used for acquiring working parameters of the high-voltage cable and working parameters of the grounding wire through data acquisition equipment;
the current effective value module is used for determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
the ground wire monitoring and scoring module is used for determining a ground wire monitoring and scoring according to the ground wire current effective value and the high-voltage cable current effective value;
The power device module is used for determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
The power device monitoring and scoring module is used for determining the monitoring and scoring of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
The partial-discharge wave recording signal module is used for obtaining a high-frequency partial-discharge wave recording signal of the high-voltage cable according to the working parameters of the high-voltage cable;
The partial discharge wave recording monitoring scoring module is used for determining partial discharge wave recording monitoring scoring according to the high-frequency partial discharge wave recording signals of the high-voltage cable;
The determining module is used for determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
An alarm module that provides at least one of a cable current anomaly alarm, an equipment status alarm, and a ground line alarm if it is determined that an alarm is generated;
determining a ground wire monitoring score according to the ground wire current effective value and the high-voltage cable current effective value, including:
According to the formula
D0＝σ(I2-aI1)
Determining a ground wire monitoring score D 0, wherein I 1 is a high-voltage cable current effective value, I 2 is a ground wire current effective value, σ is a preset ground wire monitoring weight, σ >0, a is a constant, and a=0.85.
2. The high-voltage cable grounding current on-line monitoring device based on load dynamic management according to claim 1, wherein the data acquisition device is used for acquiring the working parameters of the high-voltage cable and the working parameters of the grounding wire, and the device comprises:
Through data acquisition equipment, gather the operating parameter of high tension cable and the operating parameter of earth connection, the operating parameter of high tension cable includes: the high-voltage cable current signal, the high-voltage cable high-frequency partial discharge signal, the cable joint and the skin temperature vibration signal, and the working parameters of the grounding wire comprise: and grounding the line current signal.
3. The high voltage cable grounding current on-line monitoring device based on load dynamic management of claim 1, wherein determining the high voltage cable power device monitoring score according to the temperature and vibration frequency of the high voltage cable power device comprises:
According to the formula
D1＝β1T+β2H
Obtaining a high-voltage cable power device monitoring score D 1, wherein T is a temperature monitoring result, H is a vibration frequency, beta 1、β2 is a preset power device monitoring weight, beta 1、β2 is larger than 0, and
4. The high-voltage cable grounding current on-line monitoring device based on load dynamic management according to claim 1, wherein determining a partial discharge wave recording monitoring score according to the high-voltage cable high-frequency partial discharge wave recording signal comprises:
According to the formula
D2＝|θ1(M-m)|+|θ2(U-u)|
Determining a partial discharge recording monitoring score D 2, wherein M is the amplitude of a partial discharge recording signal, M is a standard amplitude, U is the phase of a vibration partial discharge recording signal, U is a standard phase, theta 1、θ2 is a preset partial discharge recording monitoring weight, and theta 1、θ2 is larger than 0.
5. The high voltage cable grounding current on-line monitoring device based on load dynamic management of claim 1, wherein determining whether to generate an alarm according to the partial discharge record monitoring score, the high voltage cable power device monitoring score, and the ground wire monitoring score comprises:
and when scores larger than 0 exist in the ground wire monitoring score D 0, the high-voltage cable power device monitoring score D 1 and the partial discharge wave recording monitoring score D 2, an alarm is generated.
6. The high voltage cable ground current on-line monitoring device based on load dynamic management of claim 1, wherein providing at least one of a cable current anomaly alarm, a device status alarm, and a ground line alarm in the event that an alarm is determined to be generated comprises:
Providing a ground wire alert when the ground wire monitor score D 0 is greater than 0;
providing an equipment status alert when the high voltage cable power plant monitoring score D 1 is greater than 0;
When the partial discharge record monitoring score D 2 is larger than 0, a cable current abnormality alarm is provided.
7. The high-voltage cable grounding current on-line monitoring method based on load dynamic management is characterized by comprising the following steps of;
Collecting working parameters of the high-voltage cable and working parameters of the grounding wire through data collecting equipment;
Determining a high-voltage cable current effective value and a ground wire current effective value according to the working parameters of the high-voltage cable and the working parameters of the ground wire;
determining a ground wire monitoring score according to the ground wire current effective value and the high-voltage cable current effective value;
Determining the temperature and vibration change of the high-voltage cable power device according to the working parameters of the high-voltage cable;
determining a monitoring score of the high-voltage cable power device according to the temperature and vibration change of the high-voltage cable power device;
according to the working parameters of the high-voltage cable, obtaining a high-frequency partial discharge wave recording signal of the high-voltage cable;
Determining a partial discharge wave recording monitoring score according to the high-frequency partial discharge wave recording signal of the high-voltage cable;
determining whether to generate an alarm according to the ground wire monitoring score, the partial discharge wave recording monitoring score and the high-voltage cable power device monitoring score;
Providing at least one of a cable current anomaly alarm, a device status alarm, and a ground line alarm if it is determined that an alarm is generated;
determining a ground wire monitoring score according to the ground wire current effective value and the high-voltage cable current effective value, including:
According to the formula
D0＝σ(I2-aI1)
Determining a ground wire monitoring score D 0, wherein I 1 is a high-voltage cable current effective value, I 2 is a ground wire current effective value, σ is a preset ground wire monitoring weight, σ >0, a is a constant, and a=0.85.
8. The utility model provides a high tension cable earth current on-line monitoring equipment of load dynamic management which characterized in that includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform a high voltage cable ground current on-line monitoring method based on load dynamic management as recited in claim 7.
9. A computer readable storage medium having stored thereon computer program instructions which when executed by a processor implement a load dynamic management based high voltage cable ground current on-line monitoring method as recited in claim 7.
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| CN111965497A (en) * | 2020-06-22 | 2020-11-20 | 内蒙古大唐国际托克托发电有限责任公司 | High-voltage cable early defect joint diagnosis method |
| CN219715703U (en) * | 2023-04-04 | 2023-09-19 | 武汉朗德电气有限公司 | High-voltage cable grounding current on-line monitoring device based on load dynamic management |
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| CN105115626B (en) * | 2015-09-17 | 2018-02-23 | 李成 | Single-core high-voltage cable joint intelligent monitor system and intelligent monitoring method |
| CN105910649A (en) * | 2016-06-08 | 2016-08-31 | 石家庄开发区中实检测设备有限公司 | High voltage cable state monitoring system based on direct grounding box and realization method thereof |
| CN115343583A (en) * | 2022-08-03 | 2022-11-15 | 国网浙江省电力有限公司诸暨市供电公司 | Cable joint on-line monitoring analytical equipment based on multisensor fuses |
| CN115575777A (en) * | 2022-09-30 | 2023-01-06 | 山东电工电气集团有限公司 | Medium-voltage cable state online monitoring method and system |
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| CN219715703U (en) * | 2023-04-04 | 2023-09-19 | 武汉朗德电气有限公司 | High-voltage cable grounding current on-line monitoring device based on load dynamic management |
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