CN114089254A - Power transformer multi-path automatic on-site detection system and method based on Internet of things - Google Patents
Power transformer multi-path automatic on-site detection system and method based on Internet of things Download PDFInfo
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- CN114089254A CN114089254A CN202111376050.6A CN202111376050A CN114089254A CN 114089254 A CN114089254 A CN 114089254A CN 202111376050 A CN202111376050 A CN 202111376050A CN 114089254 A CN114089254 A CN 114089254A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
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Abstract
The invention relates to a power transformer multi-path automatic on-site detection system and method based on the Internet of things, which comprises the following steps: connecting the tested mutual inductor to a field detection terminal; identifying basic parameters of a tested transformer; temporarily building an electronic fence, and sending a safety signal to a field control center after a wireless electronic access control is closed; the field control center releases the test locking and sends a test confirmation instruction to the electronic key; after the operator selects the agreement confirmation test, an agreement signal is sent to the field control center; the field control center sends a test starting instruction to a field detection terminal; the field detection terminal starts testing work; and after the test is finished, the field control center intelligently judges the test data to obtain a test result. The invention carries out wireless networking on all equipment, so that an operator absolutely keeps a safe distance from a test site in the detection process; meanwhile, distributed networking and synchronous operation of a plurality of field detection terminals can be realized, and the field detection efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of power detection, and particularly relates to a power transformer multi-path automatic on-site detection system and method based on the Internet of things.
Background
At present, for the detection of the metering/measuring/protecting winding of the power transformer, instruments commonly used in China and abroad comprise: the field test instrument comprises a current transformer field test instrument, an electromagnetic voltage transformer field test instrument, a capacitor voltage transformer field test instrument, a protection transformer winding excitation characteristic analyzer and the like. The instruments are expensive to purchase, and a single instrument carries out single-loop test on a single tested mutual inductor. A worker can only use a certain instrument on site, one winding of a certain mutual inductor is accessed at one time, then the parameter of a nameplate of the mutual inductor is manually input on a site tester, and after the detection is finished, the detection data is manually recorded and the result is judged; and then, replacing another winding to continue the detection, and repeating the steps until the detection of all the windings of all the transformers in the area is completed. After the detection result is returned to the company from the field, the detection result manually recorded on the current day is required to be recorded into a company computer database system one by one.
Taking a GIS current transformer with 110KV level interval as an example, the secondary side of each mutual inductor generally has 5 windings, including 1 metering winding, 1 measuring winding and 3 protection windings; the total number of the three phases is 45 winding taps, the detection time of only measuring 9 taps of the winding needs 45 minutes, the detection data needs to be recorded manually, and the data needs to be manually recorded into a company computer system and reported when the data is returned to the company after receiving work. A GIS substation of 110KV only finishes the detection work of a metering winding of a mutual inductor and usually needs 3-4 working days. While protection winding testing tends to take longer. According to the operation flows, the labor intensity of field detection work is high, but the work efficiency is low.
With the extension of the detection time, the risk of field cross work of multiple departments is inevitably increased, and the operation is more easily affected by weather so as to cause ineffective round trip. Along with the rapid development of economy and the acceleration of urbanization process, the scale of a power grid is enlarged, the contradiction that detection personnel are in short supply under the traditional detection mode is increasingly prominent, the existing manpower and material resources are difficult to meet the working requirements of equipment, and the detection work is urgently required to be transformed to intelligent detection.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a power transformer multi-path automatic on-site detection system and method based on the internet of things.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an automatic on-site test system of power transformer multichannel based on thing networking, includes the field test terminal, the field test terminal is provided with the intelligent terminal box that is used for connecting the mutual-inductor under test, the field test terminal is supporting to have the parameter identification equipment who is used for discerning the mutual-inductor basic parameter under test, the field test terminal is supporting to have the handheld intelligent unblock electronic key that is used for confirming the test, the field test terminal is supporting to have the fence that is used for protecting the test region temporarily, the fence disposes wireless electron entrance guard, on-site test terminal, parameter identification equipment, handheld intelligent unblock electronic key and wireless electron entrance guard are connected to the field control maincenter through wireless thing networking respectively, the intelligent terminal box is connected to field test terminal or field control maincenter through wireless thing networking.
Preferably, the on-site detection terminal includes first treater and second treater, first treater is connected with the multichannel AD converter that is used for the input of multiphase transformer and is used for the D/A converter of multiplexed output, first treater and second treater communication connection, the second treater is connected with wireless communication module, display device, input device, temperature and humidity sensor, first treater and second treater all are connected with power management module, power management module is supporting to have the battery.
Preferably, the electronic fence is provided with a safety intelligent camera for monitoring a test area, and the safety intelligent camera is connected to the field control center through a wireless internet of things.
Preferably, the field control center is provided with a super-safety inspector with an emergency termination test authority, and the super-safety inspector can view images shot by the safety intelligent camera.
Preferably, the parameter identification device is a nameplate image identification device or an electronic tag reading device.
Preferably, the field detection terminal is provided with a small laser printer for issuing a detection report, and the small laser printer is connected to the field control center through a wireless Internet of things.
Preferably, the wireless internet of things is based on Wi-Fi communication technology.
The invention also provides a multi-path automatic on-site detection method of the power transformer based on the Internet of things, which adopts the multi-path automatic on-site detection system of the power transformer based on the Internet of things, and the method comprises the following steps:
s1, connecting a tested transformer to a field detection terminal through an intelligent junction box to form a test area; identifying basic parameters of the tested mutual inductor through parameter identification equipment, and sending parameter signals to a field control center;
s2, building a temporary electronic fence at the periphery of the test area, and after closing a wireless electronic access control of the electronic fence, sending a safety signal to a field control center by the wireless electronic access control;
s3, after the field control center receives the safety signal, the test locking is released, and a test confirmation instruction is sent to the handheld intelligent unlocking electronic key;
s4, after the operator selects the agreement confirmation test, the handheld intelligent unlocking electronic key sends an agreement signal to the field control center;
s5, after receiving the agreement signal, the field control center sends a test starting instruction to the field detection terminal;
s6, after the field detection terminal receives a test starting instruction, starting test work;
s7, after the field detection terminal completes the test, sending test data to a field control center;
and S8, after the field control center receives the test data, carrying out intelligent judgment by combining the basic parameters of the tested mutual inductor to obtain a test result.
Preferably, in step S6, the test area is monitored by the security smart camera, and the security smart camera sends an image signal to the field control hub.
Preferably, in step S8, the method of intelligent judgment is as follows: and comparing the test data of the tested mutual inductor with the basic parameters, wherein if the error value of the two is within a preset error range, the test result is normal, and if the error value of the two is beyond the preset error range, the test result is abnormal.
Preferably, in step S8, a test report containing the test result is quickly issued by a small laser printer on site.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts the wireless Internet of things technology to carry out wireless networking on all equipment to be used for detection, so that an operator can absolutely keep a safe distance from a test site in the detection process, thus minimizing unsafe factors, and avoiding possible human negligence by multiple safety guarantee measures such as a handheld intelligent unlocking electronic key, an electronic fence (and a super safety inspector and a safety intelligent camera) and the like. The invention realizes the linkage safety control of the operating personnel and the detection equipment through the wireless Internet of things technology, and forms a standardized safety operation site. Meanwhile, the field detection terminals applied by the wireless Internet of things and the virtual technology are adopted, distributed networking and synchronous operation of a plurality of field detection terminals can be realized, the field detection efficiency is greatly improved, and the comprehensive field detection efficiency can be improved by 6-8 times. In a word, the invention has great improvement in the aspects of efficiency, economy, safety, quality and the like.
The invention can be suitable for the metering verification of the national provincial and municipal metering center field mutual inductor, and can also be applied to the handover test of the metering level/protection level power mutual inductor of the power installation company and the preventive test of the power mutual inductor metering level/protection level mutual inductor of the power transformation operation and maintenance company. The capacity of the power grid which is an important component of green energy is continuously expanded, and the number of the power transformers is also continuously increased, so that the invention has good application prospect and practical value.
Drawings
Fig. 1 is a scene diagram of a power transformer multi-path automatic on-site detection system based on the internet of things according to an embodiment of the invention.
Fig. 2 is a schematic block diagram of a field test terminal in an embodiment of the present invention.
The labels in the figure are: 1. detecting a terminal on site; 2. an intelligent junction box; 3. a handheld intelligent unlocking electronic key; 4. an electronic fence; 41. wireless electronic access control; 5. a field control hub; 6. a secure intelligent camera; 7. other internet of things instruments; 8. a tested transformer; 9. a super security inspector; 11. a first processor; 12. a second processor; 13. a multi-channel A/D converter; 14. a D/A converter; 15. a wireless communication module; 16. a display device; 17. an input device; 18. a temperature and humidity sensor; 19. a power management module; 191. a battery.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the embodiment provides an internet-of-things-based multi-path automatic field detection system for a power transformer, which includes a field detection terminal 1, the field detection terminal 1 is provided with an intelligent junction box 2 (or called as an external connection branching control box) for connecting a tested transformer 8, the field detection terminal 1 is matched with a parameter identification device (omitted in the figure) for identifying basic parameters of the tested transformer 8, the field detection terminal 1 is matched with a handheld intelligent unlocking electronic key 3 (or called as a wireless handheld electronic key) for confirmation test, the field detection terminal 1 is matched with an electronic fence 4 for temporarily protecting a test area, the electronic fence 4 is configured with a wireless electronic door lock 41, the field detection terminal 1, the parameter identification device, the handheld intelligent unlocking electronic key 3 and the wireless electronic door lock 41 are respectively connected to a field control center 5 through the internet of things, the intelligent junction box 2 is connected to the field detection terminal 1 or the field control center 5 through a wireless Internet of things.
The electronic fence 4 is temporarily built at the periphery of each test area so as to safely isolate a test site; only when the wireless electronic access control 41 is closed, a safety signal is sent to the field control center 5, and the field control center 5 has an opportunity to send a test starting instruction to the field detection terminal for operation. The handheld intelligent unlocking electronic key 3 is a handheld electronic device distributed to the hands of operators (namely operators), is internally provided with a wireless communication module (such as a Wi-Fi communication module), and can interact with the field control center 5 through the wireless Internet of things; only after all the handheld intelligent unlocking electronic keys 3 click and agree to the confirmation test, the field control center 5 can send a test starting instruction to the field detection terminal so as to ensure the safety of the field detection terminal 1 and the personal safety of field operators, and any one handheld intelligent unlocking electronic key 3 can execute emergency stop operation. The site control center 5 can intelligently judge a test result according to test data.
In this embodiment, as shown in fig. 2, the field test terminal 1 includes a first processor 11 and a second processor 12, the first processor 11 is connected to a multi-channel a/D converter 13 for multi-phase transformer input and a D/a converter 14 for multi-output, the first processor 11 is in communication connection with the second processor 12, the second processor 12 is connected to a wireless communication module 15, a display device 16, an input device 17, and a temperature and humidity sensor 18, the first processor 11 and the second processor 12 are both connected to a power management module 19, and the power management module 19 is configured with a battery 191. The first processor 11 is preferably, but not limited to, a 32-bit ARM processor with DSP function, the second processor 12 is preferably, but not limited to, a 32-bit or 64-bit ARM processor, the first processor 11 is preferably, but not limited to, communicatively connected to the second processor 12 through an RS232 interface or a USB interface, the input device 17 is preferably, but not limited to, at least one of a wheel and a keyboard, the display device 16 is preferably, but not limited to, a liquid crystal display, the wireless communication module 15 is preferably, but not limited to, a Wi-Fi communication module, the power management module 19 is preferably, but not limited to, a QC4.0 fast charging power management chip, which is charged for 10 minutes, i.e., can be continuously used for 8 hours, and the battery 191 is preferably, but not limited to, a lithium battery pack.
In this embodiment, the on-site detecting terminal 1 is at least one of a current transformer metering/measuring winding multi-way simultaneous-measuring on-site detecting terminal 1, a current transformer protection winding multi-way on-site detecting terminal 1 and an electromagnetic voltage transformer metering/measuring/protecting winding on-site detecting terminal 1, for example, 2 current transformer metering/measuring winding multi-path simultaneous measurement field detection terminals 1, 1 current transformer protection winding multi-path field detection terminal 1, 1 electromagnetic voltage transformer metering/measuring/protection winding field detection terminal 1, 4 sets of electronic fences 4 and 4 sets of handheld intelligent unlocking electronic keys 3 are configured, the number of the field detection terminals 1 is a prototype required by research work, and the number of the field detection terminals 1 can be reasonably planned according to actual needs to achieve expected higher work efficiency. The field detection terminal 1 is a virtual instrument which is changed from a traditional instrument (such as a current transformer field tester, an electromagnetic voltage transformer field tester, a capacitance voltage transformer field tester and a protection transformer winding excitation characteristic analyzer), the field control center 5 utilizes the wireless internet of things communication technology to automatically identify and quickly network each field detection terminal 1, and the working area range of the field quick automatic identification network reaches the radius of 100m at most. The field detection terminals 1 respectively complete the wiring of all detection items at one time through the respective intelligent junction boxes 2, and the intelligent junction boxes 2 are utilized to solve the problem that each field detection terminal 1 is limited in size but faces a large amount of external wiring; the intelligent junction box 2 is internally provided with a wireless communication module (such as a Wi-Fi communication module) and is controlled by the field detection terminal 1 or the field control center 5 to automatically switch external lines.
In the present embodiment, in order to identify the basic parameters of the measured transformer 8, the parameter identification device is preferably, but not limited to, a nameplate image identification device or an electronic tag reading device, identifies the basic parameters of the measured transformer 8 through the nameplate image identification device (e.g., identifying a nameplate through AI technology) or the electronic tag reading device (e.g., identifying an electronic tag through RFID technology), and sends a parameter signal to the field control hub 5.
In this embodiment, in order to monitor the test area, the electronic fence 4 may be configured with a security smart camera 6 for monitoring the test area, and the security smart camera 6 is connected to the field control center 5 through the wireless internet of things, that is, the test area may be monitored through the field control center 5.
In the embodiment, in order to ensure the safety of the field test, the field control center 5 is provided with a super safety inspector 9 with an emergency termination test authority, and the super safety inspector 9 can view the image shot by the safety intelligent camera 6. The super safety inspector 9 is an important safety control concept, and is generally assumed by a field work person in charge and has the highest authority of emergency termination test.
In the present embodiment, in order to rapidly issue the detection report, the on-site detection terminal 1 is equipped with a small laser printer (omitted in the figure) for issuing the detection report, and the small laser printer is connected to the on-site control center 5 through the wireless internet of things.
In this embodiment, the wireless internet of things is preferably, but not limited to, an internet of things based on Wi-Fi communication technology.
In the present embodiment, the site control hub 5 is preferably, but not limited to, a computer or a handheld terminal (e.g., a mobile phone).
The embodiment also provides a power transformer multi-path automatic on-site detection method based on the internet of things, which adopts the power transformer multi-path automatic on-site detection system based on the internet of things, and the method comprises the following steps:
s1, connecting a tested transformer 8 to a field detection terminal 1 through an intelligent junction box 2 to form a test area; identifying basic parameters of the tested mutual inductor 8 through parameter identification equipment (such as nameplate image identification equipment or electronic tag reading equipment) and sending parameter signals to the field control center 5;
s2, building a temporary electronic fence 4 at the periphery of the test area, and after closing a wireless electronic access 41 of the electronic fence 4, sending a safety signal to a field control center 5 by the wireless electronic access 41;
s3, the field control center 5 releases the test locking after receiving the safety signal and sends a test confirmation instruction to the handheld intelligent unlocking electronic key 3;
s4, after the operator selects the agreement confirmation test, the handheld intelligent unlocking electronic key 3 sends an agreement signal to the field control center 5;
s5, after receiving the agreement signal, the field control center 5 sends a test starting instruction to the field detection terminal 1;
s6, after the field detection terminal 1 receives a test starting instruction, starting test work;
s7, after the field detection terminal 1 finishes testing, sending test data to the field control center 5;
and S8, after receiving the test data, the field control center 5 intelligently judges by combining the basic parameters of the tested mutual inductor 8 to obtain a test result.
In the present embodiment, in step S6, the security smart camera 6 monitors the test area, and the security smart camera 6 transmits an image signal to the field control center 5. Wherein, super safety inspector 9 can look over the monitoring image of safe intelligent camera 6, if the abnormal condition is found, then have the right to terminate the test promptly.
In this embodiment, in step S8, the method of intelligent judgment is as follows: and comparing the test data of the tested mutual inductor with the basic parameters, wherein if the error value of the two is within a preset error range, the test result is normal, and if the error value of the two is beyond the preset error range, the test result is abnormal.
In the present embodiment, in step S8, a test report containing the test result is quickly issued by a small laser printer on site. The detection report may further include basic parameters of the tested transformer 8, test time, and information of the test personnel.
This embodiment adopts wireless internet of things, carries out wireless network deployment to all equipment that the detection will be used, makes operating personnel absolute keep with the safe distance of test site in the testing process to make unsafe factor fall to minimumly. The potential human negligence can be avoided through the 4-fold safety guarantee measures of the handheld intelligent unlocking electronic key 3, the electronic fence 4, the super safety inspector 9 and the safety intelligent camera 6.
It should be particularly noted that, the handheld intelligent unlocking electronic key 3, the electronic fence 4, the wireless electronic access control 41, the field control center 5, the safety intelligent camera 6 and the like in this embodiment may all adopt existing mature products, and specific models are not limited, and are not described herein again.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a power transformer multichannel automatic on-site detection system based on thing networking which characterized in that: including the witnessed inspections terminal, the witnessed inspections terminal is provided with the intelligent terminal box that is used for connecting the mutual-inductor that is surveyed, the witnessed inspections terminal is supporting to have the parameter identification equipment who is used for discerning the mutual-inductor basic parameter that is surveyed, the witnessed inspections terminal is supporting to have the handheld intelligent unblock electronic key that is used for confirming the test, the witnessed inspections terminal is supporting to have the fence that is used for interim protection test area, the fence disposes wireless electronic entrance guard, witnessed inspections terminal, parameter identification equipment, handheld intelligent unblock electronic key and wireless electronic entrance guard are connected to the field control maincenter through the wireless thing networking respectively, the intelligent terminal box is connected to witnessed inspections terminal or field control maincenter through the wireless thing networking.
2. The internet-of-things-based multi-path automatic on-site detection system for power transformers according to claim 1, characterized in that: the on-site detection terminal comprises a first processor and a second processor, the first processor is connected with a multi-channel A/D converter used for multi-phase mutual inductor input and a D/A converter used for multi-path output, the first processor is in communication connection with the second processor, the second processor is connected with a wireless communication module, a display device, an input device and a temperature and humidity sensor, the first processor and the second processor are both connected with a power management module, and the power management module is matched with a battery.
3. The multi-path automatic on-site detection system for the power transformer based on the Internet of things of claim 1, wherein: the parameter identification equipment is nameplate image identification equipment or electronic tag reading equipment.
4. The multi-path automatic on-site detection system for the power transformer based on the Internet of things of claim 1, wherein: the electronic fence is provided with a safe intelligent camera for monitoring a test area, and the safe intelligent camera is connected to the field control center through the wireless Internet of things.
5. The multi-path automatic on-site detection system for the power transformer based on the Internet of things of claim 1, wherein: the field control hub is equipped with a super-safety inspector having emergency termination test authority.
6. The multi-path automatic on-site detection system for the power transformer based on the Internet of things of claim 1, wherein: the field detection terminal is provided with a small laser printer used for issuing a detection report, and the small laser printer is connected to the field control center through the wireless Internet of things.
7. A multi-path automatic field detection method for a power transformer based on the Internet of things is characterized by comprising the following steps: the multi-path automatic on-site detection system for the power transformer based on the Internet of things as claimed in any one of claims 1 to 6, wherein the method comprises the following steps:
s1, connecting a tested transformer to a field detection terminal through an intelligent junction box to form a test area; identifying basic parameters of the tested mutual inductor through parameter identification equipment, and sending parameter signals to a field control center;
s2, building a temporary electronic fence at the periphery of the test area, and after closing a wireless electronic access control of the electronic fence, sending a safety signal to a field control center by the wireless electronic access control;
s3, after the field control center receives the safety signal, the test locking is released, and a test confirmation instruction is sent to the handheld intelligent unlocking electronic key;
s4, after the operator selects the agreement confirmation test, the handheld intelligent unlocking electronic key sends an agreement signal to the field control center;
s5, after receiving the agreement signal, the field control center sends a test starting instruction to the field detection terminal;
s6, after the field detection terminal receives a test starting instruction, starting test work;
s7, after the field detection terminal completes the test, sending test data to a field control center;
and S8, after the field control center receives the test data, carrying out intelligent judgment by combining the basic parameters of the tested mutual inductor to obtain a test result.
8. The multi-path automatic field detection method for the power transformer based on the internet of things of claim 7, wherein in step S6, the test area is monitored by a safety intelligent camera, and the safety intelligent camera sends an image signal to the field control center.
9. The multi-path automatic field detection method for the power transformer based on the internet of things of claim 7, wherein in the step S8, the intelligent judgment method comprises the following steps: and comparing the test data of the tested mutual inductor with the basic parameters, wherein if the error value of the two is within a preset error range, the test result is normal, and if the error value of the two is beyond the preset error range, the test result is abnormal.
10. The multi-path automatic field detection method for the power transformer based on the internet of things of claim 7, wherein in step S8, a detection report containing the test result is rapidly issued through a small laser printer on the field.
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