CN114089254B - Multi-path automatic field detection system and method for power transformer based on Internet of things - Google Patents
Multi-path automatic field detection system and method for power transformer based on Internet of things Download PDFInfo
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- CN114089254B CN114089254B CN202111376050.6A CN202111376050A CN114089254B CN 114089254 B CN114089254 B CN 114089254B CN 202111376050 A CN202111376050 A CN 202111376050A CN 114089254 B CN114089254 B CN 114089254B
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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
Abstract
The invention relates to a multi-channel automatic on-site detection system and method for a power transformer based on the Internet of things, wherein the system comprises the following steps: connecting a tested transformer to a field detection terminal; identifying basic parameters of the transformer to be tested; temporarily building an electronic fence, and sending a safety signal to a field control center after the wireless electronic entrance guard is closed; the field control center releases the test lock and sends a test confirmation instruction to the electronic key; after the operator selects to agree to confirm the test, sending an agreeing signal to the field control center; the field control center sends a test starting instruction to the field detection terminal; the field detection terminal starts the test work; and after the test is finished, the field control center intelligently judges the test data to obtain a test result. According to the invention, all the devices are subjected to wireless networking, so that an operator can absolutely keep 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 multipath 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, the instruments commonly used in China and abroad comprise: current transformer field tester, electromagnetic voltage transformer field tester, capacitance voltage transformer field tester, transformer winding excitation characteristic analyzer for protection, etc. The instruments are expensive to purchase, and are all single-loop tests for a single transformer to be tested by a single instrument. A worker can only use a certain instrument on site, access a certain winding of a certain transformer at a time, then manually input the parameters of the nameplate of the transformer on the site tester, manually record detection data after detection is finished, and judge the result; the detection is then continued by replacing another winding, and so on repeatedly until the detection of all the windings of all the transformers in the area is completed. After returning to the company from the site, the detection results manually recorded on the same day are also required to be recorded into a computer database system of the company one by one.
Taking a 110 KV-level GIS current transformer as an example, the secondary side of each phase of the transformer is generally provided with 5 windings, including 1 metering winding, 1 measuring winding and 3 protection windings; the three phases have 45 winding taps in total, the detection time of only measuring the 9 taps of the winding needs 45 minutes, the detection data needs to be manually recorded, and the detection data needs to be manually recorded into a computer system of the company and reported after the detection. Only the detection work of the metering winding of the transformer is finished by a 110KV GIS transformer substation, and usually 3-4 working days are needed. While the protection winding test tends to take longer. As can be seen from the above operation flow, the field detection has high labor intensity but low working efficiency.
With the extension of the detection time, the risk of multi-department on-site cross operation is inevitably increased, and the operation is more easily influenced by weather and can not cause invalid round trip. Along with the rapid development of economy and the acceleration of the urban process, the power grid scale is also enlarged, the contradiction of shortage of detection personnel in the traditional detection mode is increasingly prominent, the working requirements of equipment are difficult to be met by the existing manpower and material resources, and the detection work is urgently required to be converted into intelligent detection.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a system and a method for automatically detecting multiple paths of power transformers on site based on the Internet of things.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a multichannel automatic field detection system of electric power transformer based on thing networking, includes the field detection terminal, the field detection terminal is provided with the intelligent terminal box that is used for connecting the mutual-inductor that is surveyed, the field detection terminal is supporting to have the parameter identification equipment that is used for discernment mutual-inductor basic parameter that is surveyed, the field detection terminal is supporting to have the handheld intelligent unblock electronic key that is used for confirming the test, the field detection terminal is supporting to have the electronic fence that is used for interim protection test area, the electronic fence is furnished with wireless electronic entrance guard, field detection terminal, parameter identification equipment, handheld intelligent unblock electronic key and wireless electronic entrance guard are connected to the field control center through wireless thing networking respectively, the intelligent terminal box is connected to field detection terminal or field control center through wireless thing networking.
Preferably, the field detection terminal comprises a first processor and a second processor, the first processor is connected with a multichannel A/D converter for inputting of the multiphase transformer and a D/A converter for multiplexing 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.
Preferably, the electronic fence is provided with a safe intelligent camera for monitoring the test area, and the safe intelligent camera is connected to the field control center through the wireless internet of things.
Preferably, the field control hub is equipped with a super security patrol having emergency termination test authority, the super security patrol being able to view images taken by the security smart camera.
Preferably, the parameter identification device is a nameplate image identification device or an electronic tag reading device.
Preferably, the field detection terminal is equipped with a small laser printer for issuing detection reports, which is connected to the field control hub 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 field detection method of the power transformer based on the Internet of things, which adopts the multi-path automatic field 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; basic parameters of the tested transformer are identified through the parameter identification equipment, and parameter signals are sent to the field control center;
s2, setting up a temporary electronic fence at the periphery of the test area, and after closing a wireless electronic gate inhibition of the electronic fence, sending a safety signal to a field control center by the wireless electronic gate inhibition;
s3, after receiving the safety signal, the field control center releases the test lock and sends a test confirmation instruction to the handheld intelligent unlocking electronic key;
s4, after the operator selects to agree to confirm the test, the hand-held intelligent unlocking electronic key sends an agreeing signal to the field control center;
s5, after receiving the consent signal, the field control center sends a test starting instruction to the field detection terminal;
s6, after the field detection terminal receives the test starting instruction, starting test work;
s7, after the field detection terminal is tested, test data are sent to a field control center;
s8, after receiving the test data, the field control center intelligently judges by combining the basic parameters of the tested transformer to obtain a test result.
Preferably, in step S6, the test area is monitored by a safety smart camera, which sends an image signal to the site control hub.
Preferably, in step S8, the method of intelligent judgment is as follows: and comparing the test data of the tested transformer with the basic parameters, if the error values of the test data and the basic parameters fall within a preset error range, the test result is normal, and if the error values of the test data and the basic parameters exceed the preset error range, the test result is abnormal.
Preferably, in step S8, a test report containing the test results is quickly issued by a small laser printer on site.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, a wireless internet of things technology is adopted 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 a detection process, unsafe factors are minimized, and possible artificial negligence is avoided through multiple safety guarantee measures such as a handheld intelligent unlocking electronic key, an electronic fence (a super safety patrol worker and a safety intelligent camera) and the like. According to the invention, linkage safety control of operators and detection equipment is realized through the wireless internet of things technology, so that a standardized safety operation site is formed. Meanwhile, the field detection terminals applied by the wireless Internet of things and the virtual technology are adopted, so that the distributed networking and synchronous operation of a plurality of field detection terminals can be realized, the field detection efficiency is greatly improved, and the field detection comprehensive efficiency can be improved by 6-8 times. In a word, the invention has great improvement in efficiency, economy, safety, quality and other angles.
The invention can be suitable for metering verification of the field transformer of the national provincial metering center, and can also be applied to the handover test of the measuring level/protection level power transformer of the power installation company and the preventive test of the measuring level/protection level power transformer of the power transformer operation maintenance company. The power grid as an important component of the green energy source 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 multi-path automatic field detection system of a power transformer based on the internet of things in 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 marks in the figure: 1. a field detection terminal; 2. an intelligent junction box; 3. handheld intelligent unlocking electronic key; 4. an electronic fence; 41. a wireless electronic access control; 5. a field control hub; 6. a safe intelligent camera; 7. other internet of things instruments; 8. a transformer to be tested; 9. super security patrolling personnel; 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. and a battery.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the embodiment provides a multi-path automatic field detection system for a power transformer based on the internet of things, which comprises a field detection terminal 1, wherein the field detection terminal 1 is provided with an intelligent junction box 2 (or called an external line 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 hand-held intelligent unlocking electronic key 3 (or called a wireless hand-held electronic key) for confirming a test, the field detection terminal 1 is matched with an electronic fence 4 for temporarily protecting a test area, the electronic fence 4 is provided with a wireless electronic access control 41, the field detection terminal 1, the parameter identification device, the hand-held intelligent unlocking electronic key 3 and the wireless electronic access control 41 are respectively connected to a field control center 5 through the wireless internet of things, and the intelligent junction box 2 is connected to the field detection terminal 1 or the field control center 5 through the wireless internet of things.
The electronic fence 4 is used for being temporarily built on the periphery of each test area so as to safely isolate a test site; only after the wireless electronic access control 41 is closed, a safety signal is sent to the site control center 5, and the site control center 5 has the opportunity to send a test starting instruction to the site detection terminal for operation. The hand-held intelligent unlocking electronic key 3 is a hand-held electronic device distributed to hands of an operator (namely, an operator), and is internally provided with a wireless communication module (such as a Wi-Fi communication module) which can interact with the field control center 5 through the wireless Internet of things; only after all the hand-held intelligent unlocking electronic keys 3 click to agree to confirm the 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 of the hand-held intelligent unlocking electronic keys 3 can execute emergency stop operation. The field control center 5 can intelligently judge the test result according to the test data.
In this embodiment, as shown in fig. 2, the field detection terminal 1 includes a first processor 11 and a second processor 12, the first processor 11 is connected with a multi-channel a/D converter 13 for input of a multi-phase transformer and a D/a converter 14 for multiplexing output, the first processor 11 is communicatively connected with the second processor 12, the second processor 12 is connected with a wireless communication module 15, a display device 16, an input device 17, a temperature and humidity sensor 18, the first processor 11 and the second processor 12 are both connected with 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 be communicatively connected with the second processor 12 through an RS232 interface or a USB interface, the input device 17 is preferably but not limited to include at least one of a roller and a keyboard, the display device 16 is preferably but not limited to be a liquid crystal display, the wireless communication module 15 is preferably but not limited to be a Wi-Fi communication module, the power management module 19 is preferably but not limited to be a QC4.0 fast charge source management chip, and the battery 191 is preferably but not limited to be a lithium battery pack, and can be continuously used for 8 hours after being charged for 10 minutes.
In this embodiment, the field detection terminal 1 is at least one of a current transformer metering/measuring winding multi-path simultaneous measurement field detection terminal 1, a current transformer protection winding multi-path field detection terminal 1 and an electromagnetic voltage transformer metering/measuring/protection winding field detection terminal 1, for example, the number of the field detection terminals 1 can be reasonably planned according to actual needs for achieving expected higher working efficiency if the number of the current transformer metering/measuring winding multi-path simultaneous measurement field detection terminals 1, the number of the current transformer protection winding multi-path field detection terminals 1 and the number of the electromagnetic voltage transformer metering/measuring/protection winding field detection terminals 1 are at least one, and then 4 sets of electronic fences 4 and 4 sets of hand-held intelligent unlocking electronic keys 3 are configured. The above-mentioned on-site detection terminal 1 is changed from traditional instruments (such as a current transformer on-site tester, an electromagnetic voltage transformer on-site tester, a capacitive voltage transformer on-site tester, and a protection transformer winding excitation characteristic analyzer) into virtual instruments, and the on-site control center 5 utilizes a wireless internet of things communication technology to automatically identify and rapidly network each on-site detection terminal 1, and the on-site rapid automatic identification networking working area range reaches a radius of 100m at maximum. The field detection terminals 1 respectively complete wiring of all detection projects through the respective intelligent junction boxes 2 at one time, and the intelligent junction boxes 2 are utilized to solve the problems of limited volume but large number of external wiring of each field detection terminal 1; the intelligent junction box 2 is internally provided with a wireless communication module (such as a Wi-Fi communication module) which is controlled by the field detection terminal 1 or the field control center 5 to automatically switch external wires.
In this embodiment, in order to conveniently 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, and the basic parameters of the measured transformer 8 are identified through the nameplate image identification device (such as identifying a nameplate through AI technology) or the electronic tag reading device (such as identifying an electronic tag through RFID technology), and a parameter signal is sent to the site control center 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, where the security smart camera 6 is connected to the site control center 5 through the wireless internet of things, that is, the test area may be monitored through the site control center 5.
In this embodiment, to ensure safety of the field test, the field control center 5 is equipped with a super security patrol 9 having an emergency termination test authority, and the super security patrol 9 can view an image photographed by the security smart camera 6. The super security patrol 9 is an important security control concept, and is generally acted by a field work responsible person, and has the highest authority of emergency termination test.
In the present embodiment, in order to rapidly issue a detection report, the field detection terminal 1 is equipped with a small-sized laser printer (omitted from the drawing) for issuing a detection report, which is connected to the field control center 5 through the wireless internet of things.
In this embodiment, the wireless internet of things is preferably but not limited to the internet of things based on Wi-Fi communication technology.
In this embodiment, the field control hub 5 is preferably, but not limited to, a computer or a hand-held terminal (e.g., a mobile phone).
The embodiment also provides a multi-path automatic field detection method of the power transformer based on the Internet of things, which adopts the multi-path automatic field detection system of the power transformer 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; basic parameters of the transformer 8 to be tested are identified through parameter identification equipment (such as nameplate image identification equipment or electronic tag reading equipment), and parameter signals are sent to the field control center 5;
s2, building a temporary electronic fence 4 at the periphery of a test area, and after closing a wireless electronic access control 41 of the electronic fence 4, sending a safety signal to a site control center 5 by the wireless electronic access control 41;
s3, after receiving the safety signal, the field control center 5 releases the test lock and sends a test confirmation instruction to the handheld intelligent unlocking electronic key 3;
s4, after the operator selects to agree to confirm the test, the handheld intelligent unlocking electronic key 3 sends an agreeing signal to the field control center 5;
s5, after receiving the consent signal, the field control center 5 sends a test starting instruction to the field detection terminal 1;
s6, after receiving a test starting instruction, the field detection terminal 1 starts test work;
s7, after the field detection terminal 1 finishes testing, sending test data to the field control center 5;
s8, after receiving the test data, the field control center 5 carries out intelligent judgment by combining the basic parameters of the tested transformer 8 to obtain a test result.
In this embodiment, in step S6, the safety smart camera 6 monitors the test area, and the safety smart camera 6 transmits an image signal to the site control center 5. The super security patrol person 9 can check the monitoring image of the security intelligent camera 6, and if an abnormal situation is found, the test is authorized to be terminated emergently.
In this embodiment, in step S8, the method of intelligent judgment is as follows: and comparing the test data of the tested transformer with the basic parameters, if the error values of the test data and the basic parameters fall within a preset error range, the test result is normal, and if the error values of the test data and the basic parameters exceed the preset error range, the test result is abnormal.
In this embodiment, in step S8, a detection report including the test result is quickly provided by a small laser printer on site. The detection report may further include basic parameters, test time and tester information of the tested transformer 8.
According to the embodiment, a wireless Internet of things technology is adopted 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 a detection process, and unsafe factors are reduced to the minimum. The possible artificial negligence can be avoided by the 4-weight security measures of the handheld intelligent unlocking electronic key 3, the electronic fence 4, the super-security inspector 9 and the security intelligent camera 6.
It should be noted that, in this embodiment, the handheld intelligent unlocking electronic key 3, the electronic fence 4, the wireless electronic access control 41, the field control center 5, the secure intelligent camera 6 and the like may all be existing mature products, and the specific model is not limited and is not described here again.
The present invention is not limited to the above embodiments, but can be modified, equivalent, and modified in any way by those skilled in the art without departing from the scope of the present invention.
Claims (9)
1. A multi-path automatic field detection method for a power transformer based on the Internet of things is characterized by comprising the following steps of: the system comprises a field detection terminal, wherein the field detection terminal is provided with an intelligent junction box for connecting a tested transformer, the field detection terminal is matched with parameter identification equipment for identifying parameters of the tested transformer, the field detection terminal is matched with a handheld intelligent unlocking electronic key for confirming testing, the field detection terminal is matched with an electronic fence for temporarily protecting a testing area, the electronic fence is provided with a wireless electronic access control, and the field detection terminal, the parameter identification equipment, the handheld intelligent unlocking electronic key and the wireless electronic access control are respectively connected to a field control center through the wireless Internet of things, and the intelligent junction box is connected to the field detection terminal or the field control center through the wireless Internet of things; 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 parameters of the tested transformer through parameter identification equipment, and sending parameter signals to a field control center;
s2, setting up a temporary electronic fence at the periphery of the test area, and after closing a wireless electronic gate inhibition of the electronic fence, sending a safety signal to a field control center by the wireless electronic gate inhibition;
s3, after receiving the safety signal, the field control center releases the test lock and sends a test confirmation instruction to the handheld intelligent unlocking electronic key;
s4, after the operator selects to agree to confirm the test, the hand-held intelligent unlocking electronic key sends an agreeing signal to the field control center;
s5, after receiving the consent signal, the field control center sends a test starting instruction to the field detection terminal;
s6, after the field detection terminal receives the test starting instruction, starting test work;
s7, after the field detection terminal is tested, test data are sent to a field control center;
s8, after the field control center receives the test data, intelligent judgment is carried out by combining parameters of the tested transformer, and a test result is obtained.
2. The automatic multi-channel field detection method for the power transformer based on the internet of things of claim 1, wherein the method comprises the following steps of: the field detection terminal comprises a first processor and a second processor, wherein the first processor is connected with a multichannel A/D converter for inputting a multiphase transformer and a D/A converter for multiplexing 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 automatic multi-channel field detection method for the power transformer based on the internet of things of claim 1, wherein the method comprises the following steps of: the parameter identification device is nameplate image identification device or electronic tag reading device.
4. The automatic multi-channel field detection method for the power transformer based on the internet of things of claim 1, wherein the method comprises the following steps of: the electronic fence is provided with a safe intelligent camera for monitoring the test area, and the safe intelligent camera is connected to the site control center through the wireless Internet of things.
5. The automatic multi-channel field detection method for the power transformer based on the internet of things of claim 1, wherein the method comprises the following steps of: the field control hub is equipped with a super security patrol with emergency termination test authority.
6. The automatic multi-channel field detection method for the power transformer based on the internet of things of claim 1, wherein the method comprises the following steps of: the field detection terminal is provided with a small laser printer for sending detection reports, and the small laser printer is connected to a field control center through a wireless internet of things.
7. The method for automatically detecting the multiple paths of the power transformer on the basis of the internet of things according to claim 1, wherein in the step S6, the test area is monitored by the safety smart camera, and the safety smart camera sends an image signal to the on-site control center.
8. The method for automatically detecting multiple paths of power transformers on the basis of the internet of things according to claim 1, wherein in step S8, the method for intelligently judging is as follows: and comparing the tested data of the tested transformer with the parameters, if the error values of the tested transformer and the parameters fall within a preset error range, the tested result is normal, and if the error values of the tested transformer and the parameters exceed the preset error range, the tested result is abnormal.
9. The method for automatically detecting multiple paths of power transformers on the basis of the internet of things according to claim 1, wherein in step S8, a detection report containing a test result is quickly sent out by a small-sized laser printer on site.
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