CN111123002A - Non-contact information acquisition health judgment system and method for series compensation device - Google Patents
Non-contact information acquisition health judgment system and method for series compensation device Download PDFInfo
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Abstract
The invention relates to the technical field of data acquisition and analysis of a series compensation device, and discloses a non-contact information acquisition health judgment system of the series compensation device, which comprises a noise sensor for monitoring the working sound of the series compensation device, a current sensor for monitoring the current of a secondary loop, a displacement sensor for monitoring the displacement changes of a breaker and an isolating switch operating lever, and a thermal imaging module for monitoring the spectrum of the series compensation device, wherein a direct current signal isolator converts all measured signals into 0-5V voltage to be connected into a single chip microcomputer for analysis so as to judge the health state of the series compensation device and display the health state. The invention can adopt various means to monitor the series compensation device and the secondary loop control element thereof in real time from a plurality of angles, and analyze and judge whether the working state of the series compensation device is normal.
Description
Technical Field
The invention belongs to the technical field of data acquisition and analysis of a series compensation device, and particularly relates to a non-contact type information acquisition health judgment system and method of the series compensation device.
Background
At present, the on-line monitoring of the series compensation device applied in the domestic and foreign electric power system is mainly carried out by adopting a wired connection mode, the collected signals mainly comprise signals of a current transformer and a voltage transformer which are connected with the series compensation device, and opening and closing position signals of a circuit breaker and a disconnecting switch which are transmitted by opening and closing auxiliary contacts of the circuit breaker and the disconnecting switch, the patent application number is 201810436298.9, the patent name is 'series compensation device with a real-time state monitoring integrated platform', the disclosed content can monitor whether the devices such as a capacitor, a voltage limiter and a spark gap on the platform of the series compensation device work normally or not in real time, but also has the following defects:
1. the above-described monitoring devices are essentially unable to control the secondary control loop elements of the series compensation device, such as: the parts such as the switching-on and switching-off coil, the circuit breaker operating lever, the disconnecting switch operating lever and the like are monitored and diagnosed comprehensively, and further health judgment on the series compensation device cannot be carried out through a voiceprint signal and a thermal imaging signal.
2. The monitoring device has the defects that the collected signals are single and less in signal quantity, and the method for judging the health condition of the series compensation device is insufficient and single.
Therefore, how to solve the above problems becomes a focus of research by those skilled in the art.
Disclosure of Invention
The first objective of the present invention is to provide a system and a method for non-contact information collection health judgment of a series compensation device, which have solved the deficiencies of the prior art.
The embodiment of the invention is realized by the following steps:
series compensation arrangement's healthy judgement system of non-contact information acquisition includes:
the circuit breaker operating rod and the disconnecting switch operating rod of the series compensation device are respectively connected with the probe rods of a group of displacement sensors, and the displacement sensors measure the displacement variation of the operating rods and convert the displacement variation into digital quantity current signals;
the circuit breaker opening and closing coil secondary circuit and the isolating switch opening and closing coil secondary circuit of the series compensation device are respectively connected with a group of current sensors, and the current sensors are used for collecting the current of the secondary circuits;
the noise sensors are respectively arranged in the mechanism box of the circuit breaker operating rod and the mechanism box of the isolating switch operating rod and are used for acquiring sound decibel signals in the mechanism boxes and converting the sound decibel signals into analog quantity current signals;
the infrared thermal imaging module is arranged in the box body of the series compensation device and is used for acquiring an infrared spectrum and a hot spot signal of the series compensation device and converting the acquired signal into an analog quantity current signal;
the displacement sensor, the current sensor, the noise sensor and the infrared thermal imaging module are all connected with one group of the direct current signal isolators, and the direct current signal isolators are used for converting signals collected by the sensors into voltage signals of 0-5V;
the direct current signal isolators are connected with the single chip microcomputer, and the single chip microcomputer is used for analyzing and processing voltage signals converted by the direct current signal isolators;
and the display is connected with the singlechip and used for displaying the analysis result of the singlechip.
Further, the displacement sensor adopts a grating displacement sensor.
Further, the current sensor is an open-loop hall current sensor.
A method for judging the health state of a series compensation device by a non-contact information acquisition health judgment system based on the series compensation device comprises the following steps:
1) presetting a characteristic database of each sensor signal in a singlechip;
2) collecting corresponding sensing signals through a displacement sensor, a current sensor, a noise sensor and an infrared thermal imaging module, and transmitting the sensing signals to a direct current signal isolator;
3) the direct current signal isolator converts each sensing signal acquired in the step 2) into a real-time voltage signal of 0-5V and transmits the real-time voltage signal to the singlechip;
4) the single chip microcomputer analyzes and compares the real-time voltage signal with a preset characteristic database, judges the health state of the series compensation device and displays the health state on a display.
Further, the content of the preset feature database includes:
presetting a displacement sensor characteristic database: when the series compensation device is in a normal working state, sensing signals of positions of an operating rod of the circuit breaker and an operating rod of the disconnecting switch are measured by using a displacement sensor, the sensing signals are converted into voltage values A1 and A2 by a direct current signal isolator, and A1 and A2 are stored in a single chip microcomputer as reference values in a healthy state;
presetting a current sensor characteristic database: when the series compensation device is in a normal working state, sensing signals of a secondary circuit of a switching-on and switching-off coil of a circuit breaker and a secondary circuit of a switching-on and switching-off coil of a disconnecting switch are measured by using a current sensor, the sensing signals are converted into voltage values B1 and B2 by a direct current signal isolator, and the voltage values B1 and B2 are stored in a single chip microcomputer as reference values in a healthy state;
presetting a noise sensor characteristic database: when the series compensation device is in a normal working state, a noise sensor is utilized to measure working noise decibel signals of the series compensation device, the sensing signals are converted into a voltage value C1 by a direct-current signal isolator, and C1 is stored in a single chip microcomputer as a reference value in a healthy state;
presetting an infrared thermal imaging module characteristic database: when the series compensation device is in a normal working state, an infrared spectrum and a hot spot signal of the series compensation device are measured by using an infrared thermal imaging module, the sensing signal is converted into a voltage value D1 by a direct-current signal isolator, and the voltage value D1 is stored in a single chip microcomputer as a reference value in a healthy state.
Further, the method for analyzing and comparing the real-time voltage signal with the preset feature database by the singlechip comprises the following steps:
if the real-time voltage signal obtained by converting the sensing signal of the breaker operating lever measured by the displacement sensor is greater than A1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if the real-time voltage signal obtained by converting the sensing signal of the disconnecting switch operating lever measured by the displacement sensor is greater than A2, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of a switching-on and switching-off coil of the circuit breaker measured by the current sensor is greater than B1, the fact that the series compensation device has a short circuit phenomenon is indicated, and on the contrary, the fact that the series compensation device has an aging or poor contact phenomenon is indicated;
if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of the disconnecting switch switching-on and disconnecting coil measured by the current sensor is greater than B2, the fact that the series compensation device has a short circuit phenomenon is indicated, and on the contrary, the fact that the series compensation device has an aging or poor contact phenomenon is indicated;
if the real-time voltage signal obtained by converting the sound decibel signal measured by the noise sensor is greater than C1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if the real-time voltage signal obtained by converting the infrared spectrum and the hot spot signal measured by the infrared thermal imaging module is greater than D1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated.
The invention has the beneficial effects that:
the noise sensor is arranged in a mechanism box of the series compensation device in a built-in mode, the decibel of sound generated when the series compensation device acts is collected, the current sensor is sleeved on a current circuit of a secondary circuit of a switching-on/off coil to be collected and used for collecting the current of the secondary circuit, and the displacement sensor collects displacement signals of components such as a circuit breaker, an isolating switch and the like of the series compensation device; the invention can adopt a plurality of means to monitor the series compensation device and the secondary loop control element of the series compensation device in real time from a plurality of angles, and analyze and judge whether the working state of the series compensation device is normal or not.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a non-contact information acquisition health determination system of a series compensation device according to the present invention;
fig. 2 is a flowchart of a method for determining a health status of a series compensation apparatus according to the present invention.
Icon: the device comprises a displacement sensor 1, a current sensor 2, a noise sensor 3, an infrared thermal imaging module 4, a direct current signal isolator 5, a single chip microcomputer 6 and a display 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", and "right" are used,
The references to "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, or as the article of manufacture is conventionally used, and are intended to be used for convenience in describing and simplifying the invention, rather than to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular orientation, and is therefore not to be considered as limiting the invention.
Referring to fig. 1, the present embodiment provides a non-contact information acquisition health determination system for a series compensation device, which includes a displacement sensor 1, a current sensor 2, a noise sensor 3, an infrared thermal imaging module 4, a dc signal isolator 5, a single chip microcomputer 6, and a display 7.
The current sensor 2 adopts an open-loop Hall current sensor, and the model is as follows: 50-E6, and a range of 0-50A, wherein secondary circuits of a high-voltage circuit breaker and a disconnecting switch of the series compensation device are respectively connected with a switching-on coil and a switching-off coil, when the corresponding coils pass through current, the electromagnetic force of the coils drives the corresponding contacts to be switched on and off so as to control the switching-on and switching-off of the high-voltage circuit breaker and the disconnecting switch, the current of the circuit is monitored and can be used as a criterion for the state change of the series compensation device, and an open-loop Hall current sensor is sleeved on a current circuit of the secondary circuits of the high-voltage circuit breaker and the disconnecting switch and used for collecting the current of the. The Hall current sensor is small in size, good in electrical performance, high in precision and good in linearity dynamic characteristic, input of corresponding loop current is collected by the center-penetrating coil, current signals of equipment can be collected on the premise of not contacting the equipment, and influence on safe operation of the existing equipment is avoided because the Hall current sensor is not in contact with the equipment.
The model of the infrared thermal imaging module 4 is model MLF-M11, which is arranged in the box body of the series compensation device and is used for collecting the infrared spectrum and the hot spot signal of the series compensation device and converting the collected signal into an analog quantity current signal.
The output ends of the displacement sensor 1, the current sensor 2, the noise sensor 3 and the infrared thermal imaging module 4 are all connected with a group of direct current signal isolators 5, the direct current signal isolators 5 are used for converting signals collected by the sensors into voltage signals of 0-5V, and the direct current signal isolators are MIK-401Y in model.
The single chip microcomputer 6 is an Arduino series single chip microcomputer; the output of the direct current signal isolator who is connected with infrared thermal imaging module 4 connects singlechip 6's port D8, singlechip 6's port D2 is connected with the output of the direct current signal isolator that is connected with noise sensor 3, singlechip 6's port A0 is connected with the output of the direct current signal isolator that displacement sensor 1 is connected, singlechip 6's port A2 is connected with the output of the direct current signal isolator that current sensor 2 is connected, display 7 and singlechip 6's signal output interface connection for show the analysis result of singlechip. In addition, the single chip microcomputer 6 is also connected with a power module 8, and the power module 8 adopts a 9V lithium battery or a transformed direct-current power supply.
Referring to fig. 2, the embodiment further provides a method for judging the health status of the series compensation device based on the non-contact information acquisition health judgment system of the series compensation device, which includes the following steps:
1) presetting a characteristic database of each sensor signal in a singlechip; the method specifically comprises the following steps:
presetting a displacement sensor characteristic database: when the series compensation device is in a normal working state, sensing signals of positions of an operating rod of the circuit breaker and an operating rod of the disconnecting switch are measured by using a displacement sensor, the sensing signals are converted into voltage values A1 and A2 by a direct current signal isolator, and A1 and A2 are stored in a single chip microcomputer as reference values in a healthy state;
presetting a current sensor characteristic database: when the series compensation device is in a normal working state, sensing signals of a secondary circuit of a switching-on and switching-off coil of a circuit breaker and a secondary circuit of a switching-on and switching-off coil of a disconnecting switch are measured by using a current sensor, the sensing signals are converted into voltage values B1 and B2 by a direct current signal isolator, and the voltage values B1 and B2 are stored in a single chip microcomputer as reference values in a healthy state;
presetting a noise sensor characteristic database: when the series compensation device is in a normal working state, a noise sensor is utilized to measure working noise decibel signals of the series compensation device, the sensing signals are converted into a voltage value C1 by a direct-current signal isolator, and C1 is stored in a single chip microcomputer as a reference value in a healthy state;
presetting an infrared thermal imaging module characteristic database: when the series compensation device is in a normal working state, an infrared spectrum and a hot spot signal of the series compensation device are measured by using an infrared thermal imaging module, the sensing signal is converted into a voltage value D1 by a direct-current signal isolator, and the voltage value D1 is stored in a single chip microcomputer as a reference value in a healthy state.
2) Collecting corresponding sensing signals through a displacement sensor, a current sensor, a noise sensor and an infrared thermal imaging module, and transmitting the sensing signals to a direct current signal isolator;
3) the direct current signal isolator converts each sensing signal acquired in the step 2) into a real-time voltage signal of 0-5V and transmits the real-time voltage signal to the singlechip;
4) the single chip microcomputer analyzes and compares the real-time voltage signal with a preset characteristic database, judges the health state of the series compensation device and displays the health state on a display, and the specific analysis and comparison process is as follows:
if the real-time voltage signal obtained by converting the sensing signal of the breaker operating lever measured by the displacement sensor is greater than A1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if the real-time voltage signal obtained by converting the sensing signal of the disconnecting switch operating lever measured by the displacement sensor is greater than A2, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of a switching-on and switching-off coil of the circuit breaker measured by the current sensor is greater than B1, the fact that the series compensation device has a short circuit phenomenon is indicated, and on the contrary, the fact that the series compensation device has an aging or poor contact phenomenon is indicated;
if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of the disconnecting switch switching-on and disconnecting coil measured by the current sensor is greater than B2, the fact that the series compensation device has a short circuit phenomenon is indicated, and on the contrary, the fact that the series compensation device has an aging or poor contact phenomenon is indicated;
if the real-time voltage signal obtained by converting the sound decibel signal measured by the noise sensor is greater than C1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated;
if the real-time voltage signal obtained by converting the infrared spectrum and the hot spot signal measured by the infrared thermal imaging module is greater than D1, the short circuit phenomenon of the series compensation device is indicated, and on the contrary, the aging or poor contact phenomenon of the series compensation device is indicated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. Series compensation arrangement's healthy judgement system of non-contact information acquisition, its characterized in that includes:
the displacement sensor (1) is used for measuring the displacement variation of each operating rod and converting the displacement variation into a digital quantity current signal;
the circuit breaker opening and closing coil secondary circuit and the isolating switch opening and closing coil secondary circuit of the series compensation device are respectively connected with a group of current sensors (2), and the current sensors (2) are used for collecting currents of the secondary circuits;
the circuit breaker comprises a noise sensor (3), wherein a group of noise sensors (3) are respectively arranged in a mechanism box of a circuit breaker operating rod and a mechanism box of an isolating switch operating rod, and the noise sensors (3) are used for collecting sound decibel signals in the mechanism boxes and converting the sound decibel signals into analog quantity current signals;
the infrared thermal imaging module (4) is arranged in the box body of the series compensation device and is used for acquiring an infrared spectrum and a hot spot signal of the series compensation device and converting the acquired signal into an analog quantity current signal;
the displacement sensor (1), the current sensor (2), the noise sensor (3) and the infrared thermal imaging module (4) are all connected with one group of the direct current signal isolators (5), and the direct current signal isolators (5) are used for converting signals collected by the sensors into voltage signals of 0-5V;
the direct current signal isolators (5) are connected with the single chip microcomputer (6), and the single chip microcomputer (6) is used for analyzing and processing voltage signals converted by the direct current signal isolators (5);
and the display (7) is connected with the singlechip (6) and is used for displaying the analysis result of the singlechip (6).
2. The system for non-contact information-gathering health assessment of a series compensation device of claim 1, wherein: the displacement sensor (1) adopts a grating displacement sensor (1).
3. The system for non-contact information-gathering health assessment of a series compensation device of claim 1, wherein: the current sensor (2) is an open-loop Hall current sensor (2).
4. A method for judging the health status of a series compensation device based on the non-contact information acquisition health judgment system of any one of claims 1 to 3, comprising the following steps:
1) presetting a characteristic database of each sensor signal in the singlechip (6);
2) corresponding sensing signals are collected through a displacement sensor (1), a current sensor (2), a noise sensor (3) and an infrared thermal imaging module (4) and are transmitted to a direct current signal isolator (5);
3) the direct current signal isolator (5) converts each sensing signal acquired in the step 2) into a real-time voltage signal of 0-5V and transmits the real-time voltage signal to the singlechip (6);
4) the single chip microcomputer (6) analyzes and compares the real-time voltage signal with a preset characteristic database, judges the health state of the series compensation device and displays the health state on a display (7).
5. The method of determining the state of health of a series compensation device of claim 4, wherein: the content of the preset feature database comprises:
5.1) presetting a displacement sensor (1) characteristic database: when the series compensation device is in a normal working state, sensing signals measured by the positions of a breaker operating lever and a disconnecting switch operating lever are measured by using a displacement sensor (1), the sensing signals are converted into voltage values A1 and A2 by a direct current signal isolator (5), and A1 and A2 are stored in a single chip microcomputer (6) as reference values in a healthy state;
5.2) presetting a current sensor (2) characteristic database: when the series compensation device is in a normal working state, sensing signals of a secondary circuit of a circuit breaker opening and closing coil and a secondary circuit of a disconnecting switch opening and closing coil are measured by using a current sensor (2), the sensing signals are converted into voltage values B1 and B2 by a direct current signal isolator (5), and B1 and B2 are stored in a single chip microcomputer (6) as reference values in a healthy state;
5.3) presetting a noise sensor (3) characteristic database: when the series compensation device is in a normal working state, a noise sensor (3) is utilized to measure working noise decibel signals of the series compensation device, the sensing signals are converted into a voltage value C1 by a direct-current signal isolator (5), and C1 is stored in a single chip microcomputer (6) as a reference value in a healthy state;
5.4) presetting a characteristic database of the infrared thermal imaging module (4): when the series compensation device is in a normal working state, an infrared spectrum and a hot spot signal of the series compensation device are measured by using the infrared thermal imaging module (4), the sensing signal is converted into a voltage value D1 by the direct-current signal isolator (5), and the voltage value D1 is stored in the single chip microcomputer (6) as a reference value in a healthy state.
6. The method of determining the state of health of a series compensation device of claim 4, wherein: the method for analyzing and comparing the real-time voltage signal with the preset feature database by the singlechip (6) in the step 4) comprises the following steps:
6.1) if a real-time voltage signal obtained by converting a sensing signal of the breaker operating lever measured by the displacement sensor (1) is greater than A1, indicating that the series compensation device has a short circuit phenomenon, and otherwise, indicating that the series compensation device has an aging or poor contact phenomenon;
6.2) if a real-time voltage signal obtained by converting a sensing signal of the disconnecting switch operating lever measured by the displacement sensor (1) is greater than A2, indicating that the series compensation device has a short circuit phenomenon, and otherwise indicating that the series compensation device has an aging or poor contact phenomenon;
6.3) if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of a switching-on and switching-off coil of the circuit breaker measured by the current sensor (2) is greater than B1, indicating that the series compensation device has a short circuit phenomenon, and otherwise indicating that the series compensation device has an aging or poor contact phenomenon;
6.4) if a real-time voltage signal obtained by converting a sensing signal of a secondary circuit of the disconnecting switch switching-on and disconnecting coil measured by the current sensor (2) is greater than B2, indicating that the series compensation device has a short circuit phenomenon, and otherwise indicating that the series compensation device has an aging or poor contact phenomenon;
6.5) if the real-time voltage signal obtained by converting the sound decibel signal measured by the noise sensor (3) is greater than C1, indicating that the series compensation device has a short circuit phenomenon, and otherwise, indicating that the series compensation device has an aging or poor contact phenomenon;
6.6) if the real-time voltage signal obtained by converting the infrared spectrum and the hot spot signal measured by the infrared thermal imaging module (4) is greater than D1, the short circuit phenomenon exists in the series compensation device, and otherwise, the aging or poor contact phenomenon exists in the series compensation device.
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