Remote monitoring device, system and method suitable for transformer installation engineering

Abstract

The invention relates to the field of transformer installation, in particular to a remote monitoring device, system and method suitable for transformer installation engineering, and aims to solve the problems that in the transformer installation monitoring process, manual switching of detection items needs to be relied on, so that tightness among multiple installation links is insufficient, and detection efficiency is low. When the transformer is installed, various parameters in the installation process of the transformer are collected in real time, and the various parameters are analyzed according to the real-time collection result, so that corresponding control signals or alarm signals are generated, management personnel can conveniently connect the real-time parameters in the installation process of the transformer, and the management efficiency is improved. According to the remote monitoring system and the remote monitoring method, the field of the installation project is controlled, and meanwhile, the communication capability of the monitoring system and the monitoring device is tested, acquired and analyzed in real time, so that the efficiency and the stability of signal transmission in the real-time monitoring feedback process are ensured, and the operation effect of the remote monitoring system is improved.

Description

Technical Field

[0001] The present invention relates to the field of transformer installation, and specifically to a remote monitoring device, system and method applicable to transformer installation projects. Background Art

[0002] At present, large power plants generally adopt the generator-transformer unit wiring method. Transformers are large and main electrical equipment in thermal power plants. As the main primary equipment, they play a crucial role in the stable and high-quality output of electric energy. Therefore, the installation quality of the main transformer directly affects the operation of the entire power plant system. During the installation process of the transformer, it mainly includes steps such as oil quality detection, nitrogen evacuation, inspection of the core and windings, equipment installation, vacuum pumping, injection of transformer oil, and sealing test and electrical test. Currently, during the installation process of transformers in the prior art, generally after the previous process is completed, the results are manually inspected and qualified before proceeding to the next process. Therefore, there are gaps in the connection between multiple processes, and the time to obtain the results is relatively long, affecting the installation speed of the transformer. At the same time, due to the inability of manual inspection to monitor in real time, the monitoring of the installation process can only be carried out at a fixed node to obtain the results at a certain time point, and it is impossible to analyze the continuous change of parameters during the installation process. In view of the above technical problems, the present application proposes a solution. Summary of the Invention

[0003] During the installation of the transformer, the present invention collects various parameters during the installation process of the transformer in real time, analyzes the various parameters according to the real-time collected results, and thus generates corresponding control signals or alarm signals, facilitating the management personnel to connect to the real-time parameters during the installation process of the transformer, thereby controlling the on-site installation project, and solving the problems in the monitoring process of transformer installation that rely on manual switching of detection items, resulting in insufficient tightness between multiple installation links and low detection efficiency. The present invention provides a remote monitoring device, system and method applicable to transformer installation projects.

[0004] The object of the present invention can be achieved by the following technical solutions: A remote monitoring system applicable to transformer installation projects includes a monitoring communication unit, a monitoring operation unit, an oil injection control unit, a vacuum control unit, and a sealing test unit. The monitoring communication unit is used to judge the communication situation of the remote monitoring device and generate a judgment result; The oil injection control unit is used to collect the oil injection situation during the installation of the transformer, analyze according to the collected results, and generate a detection result and send it to the monitoring operation unit; The vacuum control unit is used to analyze the vacuum condition during the installation process of the transformer, generate corresponding signals according to the analysis results, and control the vacuum pumping equipment at the same time; The sealing test unit is used to collect the sealing performance during the process of testing the sealing performance of the transformer, automatically generate the sealing performance test results according to the collected results, and send them to the monitoring and operation unit; The monitoring and operation unit is used to store and record the obtained signals, and send them to the management device through the network at the same time.

[0005] As a preferred embodiment of the present invention, the communication conditions collected by the monitoring and communication unit include communication connection stability and communication connection timeliness; The method for the monitoring and communication unit to obtain communication connection stability is: After each switch of the communication connection mode by the monitoring and communication unit, each communication mode is verified for a fixed duration, and the communication speed is collected at a fixed frequency within the verification duration. The number recorded for each collection is i, i = 1, 2, 3,..., n. For the stability of different connection modes, the monitoring and communication unit is represented by θ, , where Vi is the communication rate collected for the i-th time, V0 is the average value of all the collected communication rates, and L is the packet loss rate of the data transmitted within the verification duration; The monitoring and communication unit calculates the stability θ of each communication connection mode, and compares the obtained stability θ of each communication connection mode with the corresponding threshold. If the stability θ is greater than the corresponding threshold, a connection stable signal is generated. If the stability θ is not greater than the corresponding threshold, a connection unstable signal is generated; The monitoring and communication unit calculates the number of communication connection modes that generate connection stable signals. If the number exceeds the set value, a connection normal signal is generated. If the number does not exceed the set value, a connection high-risk signal is generated. The monitoring and communication unit sends the connection normal signal, the connection high-risk signal, and the types of communication connection modes that generate connection unstable signals to the administrator device through the network.

[0006] As a preferred embodiment of the present invention, the method for the monitoring and communication unit to obtain communication connection timeliness is: When the monitoring and communication unit switches the communication connection mode, it collects the switching time, compares the switching time with the preset time threshold. If the switching time is not greater than the preset time threshold, a switching normal signal is generated. If the switching time is greater than the preset time threshold, a switching abnormal signal is generated.

[0007] As a preferred embodiment of the present invention, the vacuum control unit obtains the vacuum degree inside the transformer, compares the vacuum degree with the set vacuum degree. If the vacuum degree reaches the set standard, a vacuum degree maintenance signal is generated. If the vacuum degree does not reach the set vacuum degree, a vacuum extraction signal is generated; The vacuum control unit obtains the operating power of the vacuum pumping device, controls the operating power of the vacuum pumping device according to the vacuum degree maintenance signal and the vacuum extraction signal, and simultaneously sends the control result to the monitoring operation unit in real time.

[0008] As a preferred embodiment of the present invention, the oil injection control unit obtains the oil injection volume during oil injection in the transformer, compares the oil injection volume with the set oil injection volume standard, and generates a signal to stop oil injection when the oil injection volume reaches the set oil injection volume standard, and sends the oil injection volume to the monitoring operation unit in real time; During the oil injection process, the oil injection control unit collects the oil injection speed based on the change speed of the oil injection volume, and compares the oil injection speed with the set speed upper limit in real time. If the oil injection speed exceeds the set speed upper limit, the oil injection speed is reduced; The oil injection control unit obtains the set speed control ratio, calculates the product of the oil injection speed ratio and the set speed upper limit to obtain the oil injection speed standard, and compares the oil injection speed with the oil injection speed standard. If the oil injection speed is less than the oil injection speed standard, the oil injection speed is increased.

[0009] As a preferred embodiment of the present invention, when the sealing test unit conducts a sealing test on the transformer, it monitors the air pressure environment inside the transformer to obtain the real-time air pressure inside the transformer. The sealing test unit records the air pressure inside the transformer according to the collection time, and calculates the change speed of the air pressure according to the time interval and the air pressure difference. The specific calculation method is as follows: The sealing test unit evenly divides all the collected air pressure data into two sets in the collection order, namely the front set and the rear set. The sealing test unit calculates the change speed of the data at the same position in the rear set and the front set, and performs arithmetic averaging on all the obtained change speeds to obtain the change speed of the air pressure; By collecting the highest air pressure and the lowest air pressure during the sealing test of the transformer by the sealing test unit, the difference between the highest air pressure and the lowest air pressure is calculated to obtain the air pressure change range; The sealing test unit records the air pressure change range as F, records the air pressure change speed as f, and generates a sealing characterization value X through formula analysis, , the sealing test unit compares the sealing characterization value with the set sealing threshold. If the sealing characterization value is greater than the set sealing threshold, a normal sealing signal is generated. If the sealing characterization value is not greater than the set sealing threshold, an abnormal sealing signal is generated.

[0010] A remote monitoring method applicable to transformer installation projects, the method comprising the following steps: Step 1: Collect the communication situation of the remote monitoring device, judge the communication connection stability and communication connection timeliness respectively according to the collected communication situation, and send the judgment results; Step 2: After the communication verification is normal, monitor the oil injection volume, vacuum degree and sealing effect during the transformer installation process through the monitoring system; Step 3: Send the detection results to the monitoring operation unit, and the monitoring operation unit sends the results through the network, and at the same time generates a log file to store the results.

[0011] A remote monitoring device applicable to transformer installation projects, on which a computer program is stored. When the computer program is executed by a processor, a remote monitoring method applicable to transformer installation projects is realized.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, during the transformer installation, various parameters during the transformer installation process are collected in real time by using sensors and intelligent control systems, and various parameters are analyzed according to the real-time collected results, so as to generate corresponding control signals or alarm signals according to the analysis results, which is convenient for management personnel to connect to the real-time parameters during the transformer installation process, so as to control the site of the installation project.

[0013] In the present invention, since the installation location of the transformer is generally remote, during the operation of the monitoring system, the communication capabilities of the monitoring system and the monitoring device are tested, collected and analyzed in real time, so as to ensure the signal transmission efficiency and stability during the real-time monitoring feedback process, and improve the operation effect of the remote monitoring system. Description of the Drawings

[0014] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the drawings.

[0015] Figure 1 is the system block diagram of the present invention; Figure 2 is the system flow chart of the present invention. Detailed Embodiments

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0017] Embodiment 1: Please refer to Figure 1 - Figure 2 As shown, a remote monitoring device, system and method applicable to transformer installation projects includes a monitoring communication unit, a monitoring operation unit, an oil injection control unit, a vacuum control unit and a sealing test unit. The monitoring communication unit is used to collect the communication situation of the remote monitoring device, and the collected communication situation includes communication connection stability and communication connection timeliness; The method for the monitoring communication unit to obtain communication connection stability is: The monitoring communication unit switches the communication connection mode of the remote monitoring device. The communication connection mode includes 2G / 4G / 5G networks, local area networks and broadcast networks, so as to realize the separate operation of multiple communication connection modes; After each time the monitoring communication unit switches the communication connection mode, it verifies the communication mode once, and then obtains the stability of each communication connection mode. When verifying, the monitoring communication unit verifies each communication mode for a fixed duration, and collects the communication speed at a fixed frequency within the verification duration. Record the number of each collection as i, i = 1, 2, 3,..., n. For the stability of different connection modes, the monitoring communication unit is represented by θ, , where Vi is the communication rate collected for the i-th time, V0 is the average value of all collected communication rates, and L is the packet loss rate of the data transmitted within the verification duration; The monitoring communication unit calculates the stability θ of each communication connection mode, and compares the obtained stability θ of each communication connection mode with the corresponding threshold. If the stability θ is greater than the corresponding threshold, a connection stable signal is generated. If the stability θ is not greater than the corresponding threshold, a connection unstable signal is generated; The monitoring communication unit calculates the number of communication connection modes that generate connection stable signals. If the number exceeds the set value, a connection normal signal is generated. If the number does not exceed the set value, a connection high-risk signal is generated. At the same time, the monitoring communication unit sends the types of communication connection modes of the connection normal signal, the connection high-risk signal and the generated connection unstable signal to the administrator device through the network, and displays the types of communication connection modes of the connection high-risk signal and the generated connection unstable signal through the display device.

[0018] The method for the monitoring communication unit to obtain communication connection timeliness is: When the monitoring communication unit switches the communication connection mode, it collects the switching time, compares the switching time with a preset time threshold. If the switching time is not greater than the preset time threshold, it generates a normal switching signal; if the switching time is greater than the preset time threshold, it generates an abnormal switching signal. The starting point of the switching time collected by the monitoring communication unit is when the switching starts, and the ending point of the switching time is the time when the communication speed of the switched communication connection mode reaches a set proportion of the maximum speed.

[0019] Embodiment 2: Please refer to Figure 1 - Figure 2 As shown, the vacuum control unit collects the vacuum state inside the transformer during the installation process of the transformer, obtains the vacuum degree inside the transformer, and compares the vacuum degree with the set vacuum degree. If the vacuum degree reaches the set standard, it generates a vacuum degree maintenance signal; if the vacuum degree does not reach the set vacuum degree, it generates a vacuum extraction signal. The vacuum control unit obtains the operating power of the vacuum pumping equipment, controls the operating power of the vacuum pumping equipment according to the vacuum degree maintenance signal and the vacuum extraction signal, and simultaneously sends the control result to the monitoring operation unit in real time.

[0020] The oil filling control unit monitors the oil filling process during the installation of the transformer, thereby collecting the oil filling volume when filling the transformer, comparing the oil filling volume with the set oil filling volume standard, and generating a signal to stop oil filling when the oil filling volume reaches the set oil filling volume standard, and sending the oil filling volume to the monitoring operation unit in real time; During the oil filling process, the oil filling control unit collects the oil filling speed through the change speed of the oil filling volume, and compares the oil filling speed with the set speed upper limit in real time. If the oil filling speed exceeds the set speed upper limit, it reduces the oil filling speed; At the same time, the oil filling control unit obtains the set speed control ratio, calculates the product of the oil filling speed ratio and the set speed upper limit to obtain the oil filling speed standard, and compares the oil filling speed with the oil filling speed standard. If the oil filling speed is less than the oil filling speed standard, it increases the oil filling speed; When the sealing test unit conducts a sealing test on the transformer, it monitors the air pressure environment inside the transformer to obtain the real-time air pressure inside the transformer. The sealing test unit records the air pressure inside the transformer according to the collection time, and calculates the change speed of the air pressure according to the time interval and the air pressure difference. The specific calculation method is: The sealing test unit evenly divides all the collected air pressure data into two sets in the order of collection, namely the front set and the back set. The front set is the first half of the collected data among all the air pressure data, and the back set is the second half of the collected data in the summary of all the air pressure data. The sealing test unit calculates the air pressure difference between the first set of data in the back set and the first set of data in the front set, and divides it by the elapsed time to obtain the first change speed. By calculating the air pressure difference between the second set of data in the back set and the second set of data in the front set, and dividing it by the elapsed time, the second change speed is obtained, and so on. After calculating all the data in the back set and the front set, the arithmetic mean of all the obtained change speeds is calculated to obtain the change speed of the air pressure; The sealing test unit of the transformer collects the highest air pressure and the lowest air pressure during the sealing test process, and calculates the difference between the highest air pressure and the lowest air pressure to obtain the change range of the air pressure; The sealing test unit records the change range of the air pressure as F, records the change speed of the air pressure as f, and generates a sealing characterization value X through formula analysis, The sealing test unit compares the sealing characterization value with the set sealing threshold. If the sealing characterization value is greater than the set sealing threshold, a sealing normal signal is generated. If the sealing characterization value is not greater than the set sealing threshold, a sealing abnormal signal is generated; The sealing test unit sends the sealing abnormal signal and the sealing normal signal to the monitoring and operation unit; The monitoring and operation unit aggregates and sends all the obtained signals through the network for easy viewing by management personnel, and at the same time stores the signals in the form of generating a log file.

[0021] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the present invention to the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A remote monitoring system suitable for transformer installation engineering, characterized in that: It includes a monitoring communication unit, a monitoring operation unit, an oil injection control unit, a vacuum control unit and a sealing test unit, wherein the monitoring communication unit is used to judge the communication status of the remote monitoring device and generate a judgment result; The oil injection control unit is used to collect the oil injection situation during the transformer installation, analyze the collected results, generate the detection results and send them to the monitoring operation unit; The vacuum control unit is used to analyze the vacuum condition during the transformer installation process, generate corresponding signals according to the analysis results and control the vacuum equipment at the same time; The sealing test unit is used to collect the sealing performance during the sealing performance test of the transformer, automatically generate the sealing performance test result according to the collected result and send it to the monitoring operation unit; The monitoring operation unit is used to store and record the acquired signals and send them to the management device through the network.

2. A remote monitoring system suitable for transformer installation engineering according to claim 1, characterized in that: The communication conditions collected by the communication monitoring unit include communication connection stability and communication connection timeliness; The method for monitoring the communication unit to obtain the stability of the communication connection is: The monitoring communication unit verifies each communication mode for a fixed time after switching the communication connection mode each time, and collects the communication speed at a fixed frequency during the verification time, and records the number of each collection as i, i=1, 2, 3, ..., n. For the stability of different connection modes, the monitoring communication unit represents it with θ. , where Vi is the communication rate collected for the i-th time, V0 is the average of all communication rates collected, and L is the packet loss rate of the data transmitted during the verification time; The monitoring communication unit calculates the stability θ of each communication connection mode, and compares the obtained stability θ of each communication connection mode with the corresponding threshold value, and generates a connection stable signal if the stability θ is greater than the corresponding threshold value, and generates an unstable connection signal if the stability θ is not greater than the corresponding threshold value; The monitoring communication unit calculates the number of communication connection modes that generate stable connection signals. If the number exceeds the set value, a normal connection signal is generated. If the number does not exceed the set value, a high-risk connection signal is generated. The monitoring communication unit sends the normal connection signal, the high-risk connection signal and the type of communication connection mode that generates the unstable connection signal to the administrator device through the network.

3. A remote monitoring system suitable for transformer installation engineering according to claim 2, characterized in that: The method for the monitoring communication unit to obtain the timeliness of the communication connection is: When the communication connection mode is switched, the monitoring communication unit collects the switching time and compares the switching time with a preset time threshold. If the switching time is not greater than the preset time threshold, a normal switching signal is generated; if the switching time is greater than the preset time threshold, a abnormal switching signal is generated.

4. A remote monitoring system suitable for transformer installation engineering according to claim 1, characterized in that: The vacuum control unit obtains the vacuum degree in the transformer, compares the vacuum degree with the set vacuum degree, and generates a vacuum maintenance signal if the vacuum degree reaches the set standard, and generates a vacuum extraction signal if the vacuum degree does not reach the set vacuum degree; The vacuum control unit obtains the operating power of the vacuum pumping device, controls the operating power of the vacuum pumping device according to the vacuum degree maintenance signal and the vacuum extraction signal, and sends the control result to the monitoring operation unit in real time.

5. A remote monitoring system suitable for transformer installation engineering according to claim 4, characterized in that: The oil injection control unit obtains the oil injection amount during oil injection in the transformer, compares the oil injection amount with the set oil injection amount standard, and generates a signal to stop oil injection when the oil injection amount reaches the set oil injection amount standard, and sends the oil injection amount to the monitoring operation unit in real time; During the oil injection process, the oil injection control unit collects the oil injection speed through the change speed of the oil injection amount, and compares the oil injection speed with the set speed upper limit in real time. If the oil injection speed exceeds the set speed upper limit, the oil injection speed is reduced; The oil injection control unit obtains the set speed control ratio, multiplies the oil injection speed ratio by the set speed upper limit, obtains the oil injection speed standard, and compares the oil injection speed with the oil injection speed standard. If the oil injection speed is less than the oil injection speed standard, the oil injection speed is increased.

6. A remote monitoring system suitable for transformer installation engineering according to claim 1, characterized in that: When the sealing test unit performs a sealing test on the transformer, the air pressure environment inside the transformer is monitored to obtain the real-time air pressure inside the transformer. The sealing test unit records the air pressure inside the transformer according to the acquisition time, and calculates the change speed of the air pressure according to the time interval and the air pressure difference. The specific calculation method is: The sealing test unit divides all the collected air pressure data into two sets according to the collection order, namely, a front set and a rear set. The sealing test unit calculates the change speed of the data at the same position in the rear set and the front set, and performs arithmetic averaging on all the obtained change speeds, thereby obtaining the change speed of the air pressure; The highest and lowest air pressures during the transformer sealing test are collected through the sealing test unit, and the difference between the highest and lowest air pressures is calculated to obtain the pressure variation range; The sealing test unit records the air pressure change amplitude as F and the air pressure change speed as f, and generates the sealing characterization value X through formula analysis. The sealing test unit compares the sealing characterization value with the set sealing threshold. If the sealing characterization value is greater than the set sealing threshold, a normal sealing signal is generated. If the sealing characterization value is not greater than the set sealing threshold, a normal sealing signal is generated.

7. A remote monitoring method suitable for transformer installation engineering, characterized in that: The method comprises the following steps: Step 1: Collect the communication status of the remote monitoring device, judge the stability of the communication connection and the timeliness of the communication connection according to the collected communication status, and send the judgment result; Step 2: After the communication is verified to be normal, the oil filling amount, vacuum degree and sealing effect during the installation of the transformer are monitored through the monitoring system; Step 3: Send the test results to the monitoring operation unit, which sends the results through the network and stores the generated log files.

8. A remote monitoring device suitable for transformer installation engineering, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, a remote monitoring method applicable to a transformer installation project as claimed in claim 7 is implemented.

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