CN113686389A - Underwater equipment operation monitoring system and method - Google Patents
Underwater equipment operation monitoring system and method Download PDFInfo
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- CN113686389A CN113686389A CN202111014417.XA CN202111014417A CN113686389A CN 113686389 A CN113686389 A CN 113686389A CN 202111014417 A CN202111014417 A CN 202111014417A CN 113686389 A CN113686389 A CN 113686389A
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
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Abstract
The invention relates to a system and a method for monitoring the operation of underwater equipment, wherein the system comprises an operation box arranged on the site, the underwater equipment is connected with a switch device arranged in the operation box through a power cable, and the system also comprises a monitoring device, a residual current sensor, a vibration sensor and a temperature sensor; the residual current sensor, the vibration sensor and the temperature sensor are in communication connection with the monitoring device, and the monitoring device is in communication connection with the switch device; the electric leakage warning device has the advantages that various electric leakage information of the underwater equipment can be collected, electric leakage judgment is carried out to obtain electric leakage warning information, a disconnection instruction or a switching instruction, automatic control is achieved, relevant personnel can be reminded in time, the underwater equipment can be managed and controlled, manual detection is replaced, and the electric leakage condition can be found in time.
Description
Technical Field
The invention mainly relates to the technical field of current monitoring, in particular to an underwater equipment operation monitoring system and method.
Background
The residual current refers to the current with the vector sum of the current of each phase (including neutral line) in the low-voltage distribution line being not zero. When an accident occurs at the electricity utilization side, the current flows to the ground from the charged body through the human body, so that the I phase and I phase of the current in the inlet and outlet wires of the main circuit are unequal in magnitude, and the instantaneous vector synthesis effective value of the current is called residual current and is commonly called electric leakage.
At present, the fault of the underwater equipment is mainly found through manual pre-inspection and after-fault maintenance. On one hand, the factory personnel roughly inspect the parts and contents of the equipment by using the senses (sight, hearing, touch, smell and taste) of the human body to find the defects of the equipment and the hidden dangers of the safety; on the other hand, the method is to perform point inspection periodically, inspect or monitor the equipment according to standards (fixed point, calibration, periodic, fixed law, fixed person and five fixed persons) by means of tools, detection equipment, instruments and the like, and find out the fault and the young of the equipment. However, the problems that the detection frequency is fixed, the monitoring period is large, the artificial level influence is large, the fault of the underwater equipment is not easy to find and detect and the like exist, and the consequence is large after the equipment is in fault.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a system and a method for monitoring the operation of underwater equipment.
The technical scheme for solving the technical problems is as follows: an underwater equipment operation monitoring system comprises an operation box arranged on site, wherein the underwater equipment is connected with a switch device arranged in the operation box through a power cable, and the underwater equipment operation monitoring system also comprises a monitoring device, a residual current sensor, a vibration sensor and a temperature sensor;
the residual current sensor and the temperature sensor are arranged on the power cable, the vibration sensor is arranged on the underwater equipment, the residual current sensor, the vibration sensor and the temperature sensor are respectively in communication connection with the monitoring device, and the monitoring device is in communication connection with the switch device;
the residual current sensor is used for detecting the residual current of a three-phase circuit in the power cable in real time to obtain a residual current signal and sending the residual current signal to the monitoring device;
the vibration sensor is used for detecting the vibration state of the underwater equipment in real time to obtain a vibration value and sending the vibration value to the monitoring device;
the temperature sensor is used for detecting the temperature of the power cable in real time to obtain a temperature value and sending the temperature value to the monitoring device;
the monitoring device is used for judging electric leakage according to the residual current signal to obtain electric leakage early warning information, and judging the working state of the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information of the underwater equipment;
the switching device is also used for obtaining standby underwater equipment information from the operation box according to the electric leakage early warning information and/or the work abnormity early warning information, determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormity early warning information and the standby underwater equipment information, sending the disconnection instruction or the switching instruction to the switching device, and sending the electric leakage early warning information and/or the work abnormity early warning information to a specified terminal.
The invention has the beneficial effects that: with residual current sensor, temperature sensor and vibration sensor install on the underwater equipment, through residual current sensor, temperature sensor and vibration sensor gather the multiple operating condition information of underwater equipment, monitoring device carries out electric leakage judgement and work anomaly judgement to multiple operating condition information, still through reserve underwater equipment information, obtain disconnection instruction or switching instruction, realize automatic outage and equipment switching, and can in time remind relevant personnel, and can carry out the management and control to the underwater equipment, manual detection has been replaced, in time discover the electric leakage condition, concern the relevance of residual current and underwater equipment trouble, reduce the consequence that equipment trouble brought.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, in the monitoring device, the process of obtaining spare underwater equipment information from the operation box according to the leakage early warning information and/or the work abnormality early warning information, and determining to generate a disconnection instruction or a switching instruction according to the leakage early warning information and/or the work abnormality early warning information and the spare underwater equipment information includes:
if the information of the standby underwater equipment indicates that the standby underwater equipment does not exist, a disconnection instruction is generated for the switching device to disconnect the underwater equipment, and if the information of the standby underwater equipment indicates that the standby underwater equipment exists, a switching instruction is generated and sent to the switching device for the switching device to disconnect the underwater equipment and switch to the standby underwater equipment.
The beneficial effect of adopting the further scheme is that: the switching between the main underwater equipment and the standby underwater equipment can be automatically carried out, and the running safety of the equipment is improved.
Further, in the monitoring device, the residual current signal is subjected to electric leakage judgment, and the process of obtaining electric leakage early warning information includes:
converting three-phase current in the residual current signal into an induced voltage signal, and amplifying the induced voltage signal;
taking a voltage signal of a power grid power supply as a synchronous detection signal, and converting the synchronous detection signal and the amplified induction voltage signal into square wave signals;
carrying out phase comparison on a square wave signal of the induction voltage signal and a square wave signal of the synchronous detection signal, obtaining a positive half-wave signal and a negative half-wave signal of residual current according to a difference value of the phase comparison, and obtaining a numerical value of the residual current signal according to the positive half-wave signal and the negative half-wave signal of the residual current;
and obtaining leakage early warning information according to the residual current signal value and a preset value.
The beneficial effect of adopting the further scheme is that: the residual current signal value can be obtained by processing and analyzing the residual current signal, and the disconnection instruction or the closing instruction is judged and generated through the residual current signal value, so that the automatic control of the underwater equipment can be realized.
Further, in the monitoring device, the process of obtaining the leakage early warning information according to the residual current signal value and the preset value includes:
acquiring signal data from the positive half-wave signal and the negative half-wave signal, wherein the signal data comprise zero value data and non-zero value data, calculating the proportion of the number of the zero value data in all the signal data, if the proportion of the zero value data is within a preset proportion range, judging that the residual current signal is valid, determining the type and the angle of the residual current signal according to the proportion of the zero value data, and obtaining the action value of the residual current signal according to the type and the angle of the residual current signal;
and if the action value is larger than the preset action value, obtaining leakage early warning information.
The beneficial effect of adopting the further scheme is that: the action value is obtained through the residual current signal value, and the judgment accuracy is improved through judging whether the electric leakage problem exists or not.
Further, in the monitoring device, the working state of the underwater equipment is judged according to the vibration value, and the process of obtaining the working abnormity early warning information comprises the following steps:
and if the vibration value is larger than a preset vibration value, obtaining abnormal work early warning information, wherein the abnormal work early warning information is abnormal vibration of the underwater equipment.
The beneficial effect of adopting the further scheme is that: by detecting the vibration of the underwater equipment, the underwater equipment vibration detection device can help background management personnel to judge whether the underwater equipment has abnormal working conditions.
Further, in the monitoring device, the working state of the underwater equipment is judged according to the temperature value, and the process of obtaining the working abnormity early warning information comprises the following steps:
and if the temperature value is greater than the preset temperature value, obtaining work abnormity early warning information, wherein the work abnormity early warning information is the temperature abnormity of the power cable.
The beneficial effect of adopting the further scheme is that: through the detection to power cable temperature, can help the backstage managers to judge whether the underwater equipment is unusual.
Another technical solution of the present invention for solving the above technical problems is as follows: a residual current monitoring method of underwater equipment is characterized in that the underwater equipment is connected with a switch device arranged in an operation box on site through a power cable, and the method comprises the following steps:
detecting residual current of a three-phase line in the power cable in real time to obtain a residual current signal;
detecting the vibration state of the underwater equipment in real time to obtain a vibration value;
detecting the temperature of the power cable in real time to obtain a temperature value;
performing electric leakage judgment according to the residual current signal to obtain electric leakage early warning information, and performing working state judgment on the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information of the underwater equipment;
according to the electric leakage early warning information and/or the work abnormity early warning information, obtaining standby underwater equipment information from the operation box, determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormity early warning information and the standby underwater equipment information, sending the disconnection instruction or the switching instruction to the switch device, and sending the electric leakage early warning information and/or the work abnormity early warning information to a specified terminal.
Drawings
Fig. 1 is a schematic connection diagram of an underwater equipment operation monitoring system provided by an embodiment of the invention;
FIG. 2 is a functional block diagram of an underwater equipment operation monitoring system provided by an embodiment of the invention;
fig. 3 is a schematic flow chart of a method for monitoring operation of underwater equipment according to an embodiment of the present invention.
In the drawings, the names of the components represented by the respective symbols are as follows:
1. a monitoring device; 2. a residual current sensor; 3. a vibration sensor; 4. a temperature sensor.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1-2, a residual current monitoring system for underwater equipment comprises an operation box arranged on site, the underwater equipment is connected with a switch device arranged in the operation box through a power cable, and the residual current monitoring system further comprises a monitoring device 1, a residual current sensor 2, a vibration sensor 3 and a temperature sensor 4;
the residual current sensor 2 and the temperature sensor 4 are arranged on the power cable, the vibration sensor 3 is arranged on the underwater equipment, the residual current sensor 2, the vibration sensor 3 and the temperature sensor 4 are respectively in communication connection with the monitoring device 1, and the monitoring device 1 is in communication connection with the switch device;
the residual current sensor 2 is used for detecting the residual current of a three-phase circuit in the power cable in real time to obtain a residual current signal and sending the residual current signal to the monitoring device 1;
the vibration sensor 3 is used for detecting the vibration state of the underwater equipment in real time to obtain a vibration value and sending the vibration value to the monitoring device 1;
the temperature sensor 4 is used for detecting the temperature of the power cable in real time to obtain a temperature value and sending the temperature value to the monitoring device 1;
the monitoring device 1 is used for performing electric leakage judgment according to the residual current signal to obtain electric leakage early warning information, and performing working state judgment on the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information of the underwater equipment;
the switching device is also used for obtaining standby underwater equipment information from the operation box according to the electric leakage early warning information and/or the work abnormity early warning information, determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormity early warning information and the standby underwater equipment information, sending the disconnection instruction or the switching instruction to the switching device, and sending the electric leakage early warning information and/or the work abnormity early warning information to a specified terminal.
Specifically, the monitoring device 1, the residual current sensor 2 and the temperature sensor 4 may be all disposed in the operation box, or the monitoring device 1, the residual current sensor 2 and the temperature sensor 4 may also be disposed outside the operation box as needed.
Specifically, the residual current sensor 2, the vibration sensor 3 and the temperature sensor 4 may be in communication connection with the monitoring device 1 in a wireless or wired manner.
For example, through a wired connection:
a twisted pair cable can be used as a bus cable, the monitoring device 1, the residual current sensor 2, the vibration sensor 3 and the temperature sensor 4 are used as nodes to be connected in series, the ends A and B of each interface are connected, 120 omega terminal resistors are connected in parallel at the beginning and the tail end of the bus cable, and data transmission is carried out through an MODBUS 485 standard communication protocol, so that accurate data transmission is achieved, and external signal interference is reduced.
The monitoring device 1 and the switch device can be connected in a wireless or wired communication mode.
In the above embodiments, the residual current of the device changes, which indicates that the insulation of the live conductor to the ground is damaged, and the device has the possibility of failure, so that a new system and a new method for detecting whether the device fails in time are provided.
According to the invention, the residual current sensor, the temperature sensor and the vibration sensor are arranged on the underwater equipment, various working state information of the underwater equipment is acquired through the residual current sensor, the temperature sensor and the vibration sensor, the monitoring device carries out electric leakage judgment and abnormal working judgment on the various working state information, and a disconnection instruction or a switching instruction is obtained through standby underwater equipment information, so that automatic power failure and equipment switching are realized, related personnel can be reminded in time, the underwater equipment can be managed and controlled, manual detection is replaced, the electric leakage condition is found in time, the correlation between the residual current and the underwater equipment fault is concerned, and the consequences caused by the equipment fault are reduced.
Specifically, in the monitoring device 1, obtaining spare underwater equipment information from the operation box according to the leakage warning information and/or the work abnormality warning information, and determining a process of generating a disconnection instruction or a switching instruction according to the leakage warning information and/or the work abnormality warning information and the spare underwater equipment information includes:
if the information of the standby underwater equipment indicates that the standby underwater equipment does not exist, a disconnection instruction is generated for the switching device to disconnect the underwater equipment, and if the information of the standby underwater equipment indicates that the standby underwater equipment exists, a switching instruction is generated and sent to the switching device for the switching device to disconnect the underwater equipment and switch to the standby underwater equipment.
The operation box is also internally provided with a switch device for controlling the standby underwater equipment, the monitoring device 1 closes the working underwater equipment and sends a switching signal to the switch device of the standby underwater equipment to control the starting of the standby underwater equipment.
In the embodiment, the switching between the main underwater equipment and the standby underwater equipment can be automatically carried out, the running safety of the equipment is improved, the equipment is automatically switched to the standby underwater equipment, and the loss caused by production stop can be prevented.
Specifically, in the monitoring device 1, the process of determining the leakage of the residual current signal includes:
converting three-phase current in the residual current signal into an induced voltage signal, and amplifying the induced voltage signal;
taking a voltage signal of a power grid power supply as a synchronous detection signal, and converting the synchronous detection signal and the amplified induction voltage signal into square wave signals;
carrying out phase comparison on a square wave signal of the induction voltage signal and a square wave signal of the synchronous detection signal, obtaining a positive half-wave signal and a negative half-wave signal of residual current according to a difference value of the phase comparison, and obtaining a numerical value of the residual current signal according to the positive half-wave signal and the negative half-wave signal of the residual current;
and obtaining leakage early warning information according to the residual current signal value and a preset value.
Specifically, in the present embodiment, the phase comparison between the induced voltage signal and the synchronous detection signal is performed by a digital/analog conversion device:
and inputting the amplified induced voltage signal and the amplified synchronous detection signal into a digital/analog conversion device, and respectively outputting a square wave signal of the residual current signal and a square wave signal of the synchronous detection signal, wherein the square wave signal of the induced voltage signal lags behind the square wave signal of the synchronous detection signal, the two signals are subjected to phase comparison, and the phase of the residual current is obtained through the phase difference. The phase difference is obtained by a formula phi of 2 pi Tl/Tl, Tl is a power frequency period, and Tl is the time when the induced voltage signal lags behind the synchronous detection signal.
In the embodiment, the residual current signal can be processed and analyzed to obtain the value of the residual current signal, and the disconnection instruction or the closing instruction is judged and generated according to the value of the residual current signal, so that the automatic control of the underwater equipment can be realized.
Specifically, in the monitoring device 1, the process of obtaining the leakage warning information according to the residual current signal value and the preset value includes:
acquiring signal data from the positive half-wave signal and the negative half-wave signal, wherein the signal data comprise zero value data and non-zero value data, calculating the proportion of the number of the zero value data in all the signal data to obtain the proportion of the zero value data, judging that the residual current signal is valid if the proportion of the zero value data is within a preset proportion range, determining the type and the angle of the residual current signal according to the proportion of the zero value data, and obtaining the action value of the residual current signal according to the type and the angle of the residual current signal;
and if the action value is larger than the preset action value, obtaining leakage early warning information.
And determining the type and angle of the residual current signal according to the preset threshold range interval in which the ratio of the zero-value data is located.
Specifically, according to theoretical analysis, for example, the zero value percentage of the AC-type residual current is about 50%, when 64 discrete points are collected, the number of zero values is theoretically 32, and the actual test data is 29 to 34, 29/64 to 34/64 are taken as a first preset threshold range interval; the A-type electric leakage is direct current pulsating residual current, waveform distortion exists after the A-type electric leakage passes through a zero sequence current transformer, the 0-degree zero value proportion of the A-type electric leakage is theoretically consistent with that of an AC type and is about 50%, when 64 discrete points are collected, the number of the zero values is 32, but due to waveform deformation, actual test data is 37-42, 37/64-42/64 is used as a second preset threshold range interval; the proportion of the zero value of the A-type 90 degrees is about 75% theoretically, when 64 discrete points are collected, the number of the zero values is 48, the actual test data is 48-53, and 48/64-53/64 is used as a third preset threshold range interval; the percentage of the zero value of the type a at 135 ° is theoretically about 87.5%, and when 64 discrete points are collected, the number of the zero values is 56, and the actual test data is 57, 57/64 is taken as a fourth preset threshold value.
When the ratio of the zero-value data is within the range of the first preset threshold value, judging that the residual current signal is an AC type; when the proportion of the zero-value data is within the range of the second preset threshold value, judging that the residual current signal is A-type 0 degrees; when the proportion of the zero-value data is within the range of the third preset threshold, judging that the residual current signal is in an A-type 90 degree; and when the ratio of the zero-value data is the fourth preset threshold value, judging that the residual current signal is type A135 degrees. Thereby determining the validity of the residual current signal.
The action value of the residual current signal can be preset by a user or a manufacturer according to the field condition, and the action value ranges of the AC type, A type 0 degree, A type 90 degree and A type 135 degree residual current signals are respectively 0.5I delta n-I delta n, 0.35I delta n-1.4I delta n (or 2I delta n), 0.25I delta n-1.4I delta n (or 2I delta n) and 0.11I delta n-1.4I delta n (or 2I delta n), wherein I delta n is a rated residual current action value. According to the type and the angle of the obtained residual current signal, the action value of the residual current signal can be determined.
The preset action value is set to be larger than 2I Δ n, and if the preset action value is larger than 2I Δ n, a disconnection instruction is generated.
In the embodiment, the action value is obtained through the residual current signal value, and the opening instruction and the closing instruction are obtained through the judgment of the action value, so that the judgment accuracy is improved.
Specifically, in the monitoring device 1, the working state of the underwater equipment is determined according to the vibration value, and the process of obtaining the working abnormality early warning information of the underwater equipment includes:
and if the vibration value is larger than a preset vibration value, obtaining abnormal work early warning information, wherein the abnormal work early warning information is abnormal vibration of the underwater equipment.
Specifically, the preset vibration value may be determined by a normal vibration value of the underwater equipment, for example, the normal vibration value is 600-1000Hz, then the preset vibration value may be set to 1200Hz, and if the preset vibration value is greater than 1200Hz, it is determined that the current is leaked, and the disconnection instruction is generated.
In the above embodiment, through the detection of the vibration of the underwater equipment, whether the underwater equipment has an electric leakage condition or not can be judged.
When current passes through the circuit, the circuit can generate heat, when residual current is too large in the circuit, the temperature of the circuit can be continuously increased, even the circuit is burnt out, an electrical fire accident is caused, life and property safety is seriously threatened, and people do not pay much attention to the relationship between the residual current of equipment and equipment faults at present.
Specifically, in the monitoring device 1, the working state of the underwater equipment is determined according to the temperature value, and the process of obtaining the working abnormality early warning information includes:
and if the temperature value is greater than the preset temperature value, obtaining work abnormity early warning information, wherein the work abnormity early warning information is the temperature abnormity of the power cable.
Specifically, the preset temperature value may be determined by a normal temperature value of the power cable, for example, the normal temperature value is 50 degrees, then the preset temperature value may be set to 60 degrees, and if the preset temperature value is greater than 60 degrees, it is determined that the current is leaked, and the disconnection command is generated.
In the above embodiment, through the detection to the power cable temperature, can judge whether the underwater equipment has the electric leakage condition.
Example 2:
as shown in fig. 3, a method for monitoring residual current of underwater equipment, the underwater equipment is connected with a switch device arranged in an operation box on the spot through a power cable, comprising the following steps:
detecting residual current of a three-phase line in the power cable in real time to obtain a residual current signal;
detecting the vibration state of the underwater equipment in real time to obtain a vibration value;
detecting the temperature of the power cable in real time to obtain a temperature value;
performing electric leakage judgment according to the residual current signal to obtain electric leakage early warning information and a disconnection instruction, sending the electric leakage early warning information to a specified terminal, and sending the disconnection instruction to a switch device for the switch device to close and control the underwater equipment;
and judging the working state of the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information, and sending the working abnormity early warning information to a specified terminal.
Specifically, the process of determining the leakage of the residual current signal includes:
converting three-phase current in the residual current signal into an induced voltage signal, and amplifying the induced voltage signal;
taking a voltage signal of a power grid power supply as a synchronous detection signal, and converting the synchronous detection signal and the amplified induction voltage signal into square wave signals;
carrying out phase comparison on a square wave signal of the induction voltage signal and a square wave signal of the synchronous detection signal to obtain a positive half-wave signal and a negative half-wave signal of residual current according to a difference value of the phase comparison, and obtaining a numerical value of the residual current signal according to the positive half-wave signal and the negative half-wave signal of the residual current;
and determining to generate the disconnection instruction according to the residual current signal value and a preset value, and sending the disconnection instruction to the switch device.
Specifically, the process of judging the working state of the underwater equipment according to the vibration value and obtaining the working abnormity early warning information comprises the following steps:
and if the vibration value is larger than a preset vibration value, obtaining abnormal work early warning information, wherein the abnormal work early warning information is abnormal vibration of the underwater equipment.
Specifically, the working state of the underwater equipment is judged according to the temperature value, and the process of obtaining the working abnormity early warning information comprises the following steps:
and if the temperature value is greater than the preset temperature value, obtaining work abnormity early warning information, wherein the work abnormity early warning information is the temperature abnormity of the power cable.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An underwater equipment operation monitoring system comprises an operation box arranged on the site, and underwater equipment is connected with a switch device arranged in the operation box through a power cable, and is characterized by further comprising a monitoring device (1), a residual current sensor (2), a vibration sensor (3) and a temperature sensor (4); the residual current sensor (2) and the temperature sensor (4) are arranged on the power cable, and the vibration sensor (3) is arranged on the underwater equipment;
the residual current sensor (2) is used for detecting the residual current of a three-phase circuit in the power cable in real time to obtain a residual current signal and sending the residual current signal to the monitoring device (1);
the vibration sensor (3) is used for detecting the vibration state of the underwater equipment in real time to obtain a vibration value and sending the vibration value to the monitoring device (1);
the temperature sensor (4) is used for detecting the temperature of the power cable in real time to obtain a temperature value and sending the temperature value to the monitoring device (1);
the monitoring device (1) is used for judging electric leakage according to the residual current signal to obtain electric leakage early warning information, and judging the working state of the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information of the underwater equipment;
the switching device is also used for obtaining standby underwater equipment information from the operation box according to the electric leakage early warning information and/or the work abnormity early warning information, determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormity early warning information and the standby underwater equipment information, sending the disconnection instruction or the switching instruction to the switching device, and sending the electric leakage early warning information and/or the work abnormity early warning information to a specified terminal.
2. The underwater equipment operation monitoring system according to claim 1, wherein in the monitoring device (1), the process of obtaining standby underwater equipment information from the operation box according to the electric leakage early warning information and/or the work abnormality early warning information, and determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormality early warning information and the standby underwater equipment information includes:
if the information of the standby underwater equipment indicates that the standby underwater equipment does not exist, a disconnection instruction is generated for the switching device to disconnect the underwater equipment, and if the information of the standby underwater equipment indicates that the standby underwater equipment exists, a switching instruction is generated and sent to the switching device for the switching device to disconnect the underwater equipment and switch to the standby underwater equipment.
3. The system for monitoring the operation of underwater equipment according to claim 1, wherein in the monitoring device (1), the residual current signal is subjected to electric leakage judgment, and the process of obtaining electric leakage early warning information includes:
converting three-phase current in the residual current signal into an induced voltage signal, and amplifying the induced voltage signal;
taking a voltage signal of a power grid power supply as a synchronous detection signal, and converting the synchronous detection signal and the amplified induction voltage signal into square wave signals;
carrying out phase comparison on a square wave signal of the induction voltage signal and a square wave signal of the synchronous detection signal, obtaining a positive half-wave signal and a negative half-wave signal of residual current according to a difference value of the phase comparison, and obtaining a numerical value of the residual current signal according to the positive half-wave signal and the negative half-wave signal of the residual current;
and obtaining leakage early warning information according to the residual current signal value and a preset value.
4. The underwater equipment operation monitoring system according to claim 3, wherein the process of obtaining the leakage warning information according to the residual current signal value and the preset value in the monitoring device (1) comprises:
acquiring signal data from the positive half-wave signal and the negative half-wave signal, wherein the signal data comprise zero value data and non-zero value data, calculating the proportion of the number of the zero value data in all the signal data to obtain the proportion of the zero value data, judging that the residual current signal is valid if the proportion of the zero value data is within a preset proportion range, determining the type and the angle of the residual current signal according to the proportion of the zero value data, and obtaining the action value of the residual current signal according to the type and the angle of the residual current signal;
and if the action value is larger than the preset action value, obtaining leakage early warning information.
5. The underwater equipment operation monitoring system according to claim 1, wherein in the monitoring device (1), the working state of the underwater equipment is judged according to the vibration value, and the process of obtaining the working abnormality early warning information of the underwater equipment comprises:
and if the vibration value is larger than a preset vibration value, obtaining abnormal work early warning information, wherein the abnormal work early warning information is abnormal vibration of the underwater equipment.
6. The system for monitoring the operation of the underwater equipment according to claim 1, wherein in the monitoring device (1), the judgment of the working state of the underwater equipment is carried out according to the temperature value, and the process of obtaining the early warning information of the working abnormality comprises the following steps:
and if the temperature value is greater than the preset temperature value, obtaining work abnormity early warning information, wherein the work abnormity early warning information is the temperature abnormity of the power cable.
7. An underwater equipment operation monitoring method of underwater equipment is characterized in that the underwater equipment is connected with a switch device arranged in an operation box on site through a power cable, and the method comprises the following steps:
detecting residual current of a three-phase line in the power cable in real time to obtain a residual current signal;
detecting the vibration state of the underwater equipment in real time to obtain a vibration value;
detecting the temperature of the power cable in real time to obtain a temperature value;
performing electric leakage judgment according to the residual current signal to obtain electric leakage early warning information, and performing working state judgment on the underwater equipment according to the vibration value and the temperature value respectively to obtain working abnormity early warning information of the underwater equipment;
according to the electric leakage early warning information and/or the work abnormity early warning information, obtaining standby underwater equipment information from the operation box, determining to generate a disconnection instruction or a switching instruction according to the electric leakage early warning information and/or the work abnormity early warning information and the standby underwater equipment information, sending the disconnection instruction or the switching instruction to the switch device, and sending the electric leakage early warning information and/or the work abnormity early warning information to a specified terminal.
8. The subsea equipment operation monitoring method of claim 7, wherein the step of making a leakage determination on the residual current signal comprises:
converting three-phase current in the residual current signal into an induced voltage signal, and amplifying the induced voltage signal;
taking a voltage signal of a power grid power supply as a synchronous detection signal, and converting the synchronous detection signal and the amplified induction voltage signal into square wave signals;
carrying out phase comparison on a square wave signal of the induction voltage signal and a square wave signal of the synchronous detection signal, obtaining a positive half-wave signal and a negative half-wave signal of residual current according to a difference value of the phase comparison, and obtaining a numerical value of the residual current signal according to the positive half-wave signal and the negative half-wave signal of the residual current;
and determining to generate the disconnection instruction according to the residual current signal value and a preset value, and sending the disconnection instruction to the switch device.
9. The underwater equipment operation monitoring method according to claim 7, wherein the process of judging the working state of the underwater equipment according to the vibration value and obtaining the working abnormality early warning information comprises the following steps:
and if the vibration value is larger than a preset vibration value, obtaining abnormal work early warning information, wherein the abnormal work early warning information is abnormal vibration of the underwater equipment.
10. The method for monitoring the operation of the underwater equipment according to claim 7, wherein the process of judging the working state of the underwater equipment according to the temperature value and obtaining the early warning information of the working abnormality comprises the following steps:
and if the temperature value is greater than the preset temperature value, obtaining work abnormity early warning information, wherein the work abnormity early warning information is the temperature abnormity of the power cable.
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