CN115459449A - A substation monitoring method and system capable of real-time analysis of transformer operation performance - Google Patents

Abstract

The invention discloses a substation monitoring system capable of real-time analysis of transformer operation performance, comprising a monitoring host, an operation monitoring unit and an intelligent station online monitoring IED, and the monitoring host is arranged in a substation monitoring center. The substation monitoring method and system that can analyze the operating performance of the transformer in real time process the transformer parameters monitored by the substation through the CPU, combine the sample retrieval algorithm to compare the fault types in the historical fault database, and use the Flink real-time calculation engine and the internal algorithm of the CPU to analyze Perform real-time analysis of the transformer’s operating performance, and display the parameters of the transformer’s operating process through the visual terminal. When the analysis of the transformer fault is confirmed, the real-time backup of the rsync+inotify data is used to complete the update of the historical fault database of the database server, which is convenient The substation monitoring method and system have the function of analyzing the operation performance of the transformer in real time.

Description

A substation monitoring method and system capable of real-time analysis of transformer operation performance

technical field

The invention relates to the technical field of substation monitoring, in particular to a substation monitoring method and system capable of real-time analysis of transformer operation performance.

Background technique

A substation is a place in a power system that transforms voltage and current, receives electric energy and distributes electric energy. The electrical equipment in the substation is divided into primary equipment and secondary equipment. Primary equipment refers to equipment that directly produces, transmits, distributes and uses electric energy, mainly including transformers, high-voltage circuit breakers, disconnectors, busbars, lightning arresters, capacitors, reactors, etc.

A power transformer is a static electrical device that is used to change an AC voltage (current) of a certain value into another voltage (current) with the same frequency or several different values. It is based on the principle of electromagnetic induction to achieve electrical energy transfer. Transformers can be divided into power transformers, test transformers, instrument transformers and special-purpose transformers according to their uses: power transformers are necessary equipment for power transmission and distribution, and power distribution for power users. As the key equipment in the power system, the power transformer is closely related to the safe and stable operation of the society. Once the transformer fails, it will not only affect normal production and stable life, but also cause huge economic losses. Under normal circumstances, the substation will install cameras around the transformer to monitor the real-time environment of the transformer, and regularly detect the temperature and other parameters of the transformer manually, so as to analyze the operation performance of the transformer through the substation center.

Existing transformers generally use manual inspections to complete the regular monitoring of substations. In the process of detecting transformer operating parameters, wireless data transmission is generally used for data uploading. However, in data analysis, manual diagnosis and identification are generally based on experience. Such an operation mode is difficult to analyze the operation performance of the transformer in time.

Contents of the invention

The purpose of the present invention is to provide a substation monitoring method and system capable of real-time analysis of transformer operating performance, to solve the problem that the data analysis during the operation of the transformer proposed in the above-mentioned background technology is usually manually diagnosed and identified based on experience, making it difficult to timely Analyze the problem of the operation performance of the transformer.

In order to achieve the above purpose, the present invention provides the following technical solutions: a substation monitoring system capable of real-time analysis of transformer operation performance, including a monitoring host, an operation monitoring unit and an intelligent station online monitoring IED,

The monitoring host is set in the monitoring center of the substation, the monitoring host is connected to the visualization terminal through the data cable, the monitoring host is connected to the alarm indicator light through the cable, the network interface module is set inside the monitoring host, and the monitoring host is connected through the network interface. The module is wirelessly connected to the 4G wireless communication network, and the input end of the monitoring host is respectively wirelessly connected to the data collector and the intelligent station to monitor the IED online through the 4G wireless communication network, and the data collector and the intelligent station monitor the IED online at the same time A running monitoring unit is connected, and the running monitoring unit is set on the transformer.

Preferably, the monitoring host includes a CPU, a memory and a database server, and the CPU is arranged on a circuit board inside the monitoring host.

Preferably, the CPU is connected to the memory through a circuit, and a database server is also arranged inside the monitoring host, and the database server is electrically connected to the CPU.

Preferably, the operation monitoring unit includes a temperature monitoring module, an oil level monitoring module, a vibration monitoring unit, an open-loop current sensor and an SF6 gas transmitter, the temperature monitoring module is connected to a transformer, and the temperature monitoring module adopts A winding thermometer, and a temperature monitoring module is connected to the transformer winding through a sense joint.

Preferably, the oil level monitoring module is installed on the insulating oil container of the transformer, the vibration monitoring unit is installed on the transformer shell, and the output ports of the temperature monitoring module, the oil level monitoring module and the vibration monitoring unit are all connected to the data acquisition device connection.

Preferably, the open-loop current sensor is wired to a transformer, the SF gas transmitter is installed with the transformer, and an SF6 gas sensor is arranged inside the SF6 gas transmitter.

Preferably, the output interfaces of the open-loop current sensor and the SF6 gas transmitter are simultaneously connected to an intelligent station for online monitoring of the IED.

A substation monitoring method capable of analyzing transformer operation performance in real time, comprising the following steps:

S1: Transformer real-time operation monitoring, using temperature monitoring module, oil level monitoring module, vibration monitoring unit, open-loop current sensor and SF6 gas transmitter to monitor the temperature, oil level, vibration, operating parameters and safety of multiple transformers in the substation conduct online monitoring;

S2: Upload the transformer operation data in real time, collect the temperature data, oil level data and vibration data of the transformer during operation through the data collector, and collect the operation parameters and safety data of the transformer during operation through the online monitoring IED of the intelligent station, and the data collector and The online monitoring IED of the intelligent station is uploaded to the monitoring host in the substation through the 4G wireless communication network;

S3: Build a transformer history fault database, retrieve examples of substation transformer fault types through a big data search engine, and perform internal classification through the database server, and import the types and causes of transformer faults in this substation into the database server through an external input module;

S4: Calculate and analyze transformer faults in real time, collect and process the transformer parameters monitored by the substation through the CPU in the monitoring host, and use the Flink real-time computing engine to process and analyze the uploaded data, and compare the faults in the database server through the CPU combined with the sample retrieval algorithm Types of;

S5: Data display and alarm prompt. After the CPU analyzes the fault type, the fault information is uploaded to the visual terminal, and the real-time operating parameters of the transformer processed by the CPU are also displayed through the visual terminal. Alarm indicators are set for the transformer fault points monitored by the substation. , in the event of a fault, through the lighted alarm indicator to assist personnel to quickly identify the direction of the transformer fault.

Preferably, the data collector described in step S2 uploads data to the monitoring host through UDP real-time transport protocol and 4G wireless communication network.

Preferably, the intelligent station online monitoring IED described in step S2 uploads data to the monitoring host through Ethernet and 4G wireless communication network.

Compared with prior art, the beneficial effect of the present invention is:

1. The substation monitoring method and system that can analyze the operating performance of transformers in real time process the transformer parameters monitored by the substation through the CPU, combine the sample retrieval algorithm to compare the fault types in the historical fault database, and use the Flink real-time calculation engine and the internal algorithm of the CPU To analyze the operation performance of the transformer in real time, and display the parameters of the transformer operation process through the visual terminal. When the analysis of the transformer fault is confirmed, the real-time backup of rsync+inotify data is used to complete the update of the historical fault database of the database server. Furthermore, it is convenient for the substation monitoring method and system to have the function of real-time analysis of transformer operation performance;

2. The substation monitoring method and system that can analyze the operating performance of transformers in real time is constructed through the real-time temperature monitoring of the temperature monitoring module to obtain an LSTM neural network to establish a transformer operating temperature prediction model, and the transformer is monitored by the oil level monitoring module of the ultrasonic liquid level detector. The liquid level of the insulating oil is monitored, and the vibration acceleration sensor of the voiceprint vibration online monitoring system is used to monitor the voiceprint generated by the transformer vibration, and the open-loop current sensor of the IED is monitored in real time and continuously by the intelligent station The AC and DC currents of the neutral points can track and monitor the state parameters of the transformer. By using the SF6 gas transmitter, the SF6 concentration of the transformer can be monitored, so that the transient faults and sudden faults of the transformer can be quickly responded and identified, which is convenient. Substation maintenance personnel can timely maintain and overhaul transformers in the substation according to the substation monitoring method and system.

Description of drawings

Fig. 1 is a schematic diagram of the system of the present invention;

Fig. 2 is the schematic diagram of CPU principle of the present invention;

Fig. 3 is a schematic flow chart of the present invention.

In the figure: 1. Monitoring host; 101. CPU; 102. Memory; 103. Database server; 2. Visual terminal; 3. Alarm indicator light; 4. 4G wireless communication network; 5. Data collector; 6. Operation monitoring unit ; 601, temperature monitoring module; 602, oil level monitoring module; 603, vibration monitoring unit; 604, open-loop current sensor; 605, SF6 gas transmitter; 7, intelligent station online monitoring IED.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: a substation monitoring system that can analyze transformer operation performance in real time, including a monitoring host 1, an operation monitoring unit 6 and an intelligent station online monitoring IED7, and the monitoring host 1 is set in the substation In the monitoring center, the monitoring host 1 is connected to the visualization terminal 2 through a data cable, and the monitoring host 1 is connected to the alarm indicator 3 through a cable. The monitoring host 1 is equipped with a network interface module, and the monitoring host 1 is connected to the 4G wireless communication network through the network interface module. 4 Wireless connection, the input terminal of monitoring host 1 is wirelessly connected to data collector 5 and intelligent station online monitoring IED7 respectively through 4G wireless communication network 4, and the access terminal of data collector 5 and intelligent station online monitoring IED7 is simultaneously connected to operation monitoring unit 6 , the operation monitoring unit 6 is set on the transformer.

Monitoring host 1 comprises CPU101, memory 102 and database server 103, and CPU101 is arranged on the circuit mainboard of monitoring host 1 interior; For electrical connection, the CPU 101 is respectively connected to the memory 102 and the database server 103 in a two-way circuit, and the database server 103 adopts an AS6604T model server.

During specific implementation, the transformer operating parameters uploaded by the online monitoring IED7 are collected by the CPU101 through the data collector 5 and the intelligent station, and the transformer parameters monitored by the substation are processed through the CPU101, and the uploaded data is processed and analyzed by using the Flink real-time calculation engine, and combined with The sample retrieval algorithm compares the fault types in the historical fault database. At the same time, the real-time analysis of the operating performance of the transformer is carried out through the Flink real-time calculation engine and the internal algorithm of CPU101. The parameters of the transformer operating process can be displayed in various aspects through the visual terminal 2 , when the set alarm indicator 3 lights up in red, it can prompt the fault point in the specific direction of the transformer, so as to assist personnel to quickly identify the transformer fault. The historical fault database of the database server 103 is updated.

The operation monitoring unit 6 includes a temperature monitoring module 601, an oil level monitoring module 602, a vibration monitoring unit 603, an open-loop current sensor 604 and an SF6 gas transmitter 605. The temperature monitoring module 601 is connected to the transformer, and the temperature monitoring module 601 A winding thermometer is used, and the temperature monitoring module 601 is connected to the transformer winding through an induction joint; the oil level monitoring module 602 is installed on the insulating oil container of the transformer, the oil level monitoring module 602 adopts an ultrasonic liquid level detector, and the vibration monitoring unit 603 is installed on the transformer shell Above, the vibration monitoring unit 603 adopts the voiceprint vibration online monitoring system, and the voiceprint vibration online monitoring system is composed of a vibration acceleration sensor, a voiceprint monitoring and edge computing device, and a remote diagnosis service center. The temperature monitoring module 601, the oil level monitoring module 602 and the The output ports of the vibration monitoring unit 603 are all connected with the data collector 5; the open-loop current sensor 604 is connected with the transformer wiring, and the SF6 gas transmitter 605 is installed with the transformer, and the inside of the SF6 gas transmitter 605 is provided with an SF6 gas sensor The output interfaces of the open-loop current sensor 604 and the SF6 gas transmitter 605 are connected to the intelligent station online monitoring IED7 at the same time, and the open-loop current sensor 604 and the SF6 gas transmitter 605 are connected to the transformer DC bias online monitoring system, and The transformer DC bias online monitoring system connects the intelligent station to monitor the IED7 online through the acquisition instrument.

During specific implementation, the real-time temperature monitoring of the temperature monitoring module 601 is used to construct the LSTM neural network to establish a transformer operating temperature prediction model, and the oil level monitoring module 602 of the ultrasonic liquid level detector is used to monitor the transformer insulating oil level. The vibration acceleration sensor of the line vibration online monitoring system monitors the voiceprint generated by the transformer vibration, packs and processes the collected data through the edge computing device, and performs intelligent diagnosis by the remote diagnosis service center, and monitors the open loop of the IED7 online through the intelligent station The type current sensor 604 monitors the AC and DC currents flowing through the neutral point of the transformer in real time and continuously, so as to track and monitor the state parameters of the transformer, and use SF6 gas to insulate switches, circuit breakers and other equipment in power transmission and distribution. The SF6 gas transmitter 605 can monitor the SF6 concentration of the transformer, so as to quickly respond and identify the transient fault and sudden fault of the transformer sensitively, so as to facilitate the timely maintenance and repair of the transformer by the substation maintenance personnel.

A substation monitoring method capable of analyzing transformer operation performance in real time, comprising the following steps:

S1: Transformer real-time operation monitoring, using temperature monitoring module 601, oil level monitoring module 602, vibration monitoring unit 603, open-loop current sensor 604 and SF6 gas transmitter 605 to monitor the temperature, oil level and vibration of multiple transformers in the substation , operating parameters and safety are monitored online, and the temperature parameters monitored by the transformer are uploaded once every 10 minutes through the temperature monitoring module 601, and the temperature parameters of 144 continuous time points are collected within 24 hours, so as to establish the transformer operation through the LSTM neural network Temperature prediction model;

S2: upload transformer operation data in real time, collect temperature data, oil level data and vibration data during transformer operation through data collector 5, and data collector 5 uploads data to monitoring host 1 through UDP real-time transmission protocol and 4G wireless communication network 4, The online monitoring IED7 of the intelligent station collects the operating parameters and safety data of the transformer during operation, the online monitoring IED7 of the intelligent station cooperates with the 4G wireless communication network 4 to upload data to the monitoring host 1 through the Ethernet, and the data collector 5 and the intelligent station monitor the IED7 online All are uploaded to the monitoring host 1 in the substation through the 4G wireless communication network 4;

S3: Build a transformer history fault database, retrieve examples of substation transformer fault types through a big data search engine, and perform internal classification through the database server 103, and import the type and cause of the substation transformer fault into the database server 103 through an external input module, Thereby the data that is classified by database server 103 is constructed to form the history fault database of transformer;

S4: Real-time calculation and analysis of transformer faults. The CPU101 in the monitoring host 1 collects and processes the transformer parameters monitored by the substation, and uses the Flink real-time calculation engine to process and analyze the uploaded data, and compares the database server 103 through the CPU101 combined with the sample retrieval algorithm. Flink real-time calculation engine and CPU101 are used to analyze the operating performance of the transformer in real time, and the analysis data of the transformer operating performance is backed up in real time through rsync+inotify;

S5: Data display and alarm prompt. After analyzing the fault type by CPU101, the fault information is uploaded to the visual terminal 2, and the real-time operation parameters of the transformer processed by CPU101 are also displayed through the visual terminal 2, and alarms are set for the transformer fault points monitored by the substation. The indicator light 3 assists personnel to quickly identify the transformer fault direction through the lighted alarm indicator light 3 when a fault occurs.

To sum up, through the temperature monitoring module 601, the oil level monitoring module 602, the vibration monitoring unit 603, the open-loop current sensor 604 and the SF6 gas transmitter 605, the transformer temperature, oil level, vibration, operating parameters and safety The parameters are monitored in real time, and the transformer parameters monitored by the substation are processed by the CPU101 of the monitoring host 1. The parameters of the transformer operation process can be displayed in various aspects through the visual terminal 2, and the alarm indicator 3 is set to give a fault prompt, so that the substation Real-time analysis and fault warning prompts for transformers can be completed, and the content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a but transformer substation monitoring system of real-time analysis transformer running performance, includes monitoring host computer (1), operation monitoring unit (6) and intelligent station on-line monitoring IED (7), its characterized in that:

monitoring host computer (1) sets up in the transformer substation surveillance center, visual terminal (2) is connected through the data cable in monitoring host computer (1), cable junction warning pilot lamp (3) are passed through in monitoring host computer (1), the inside of monitoring host computer (1) sets up network interface module, and monitors host computer (1) through network interface module and 4G wireless communication network (4) wireless connection, the input of monitoring host computer (1) passes through 4G wireless communication network (4) respectively wireless connection data collection station (5) and intelligent station on-line monitoring IED (7), operation monitoring unit (6) is connected simultaneously to the incoming end of data collection station (5) and intelligent station on-line monitoring IED (7), operation monitoring unit (6) set up on the transformer.

2. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 1, wherein: the monitoring host (1) comprises a CPU (101), a memory (102) and a database server (103), wherein the CPU (101) is arranged on a circuit main board inside the monitoring host (1).

3. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 2, wherein: the monitoring system comprises a monitoring host (1), a CPU (101), a memory (102), a database server (103), a data processing unit (CPU) and a data processing unit (CPU), wherein the CPU (101) is connected with the memory (102) through a circuit, the database server (103) is further arranged inside the monitoring host (1), and the database server (103) is electrically connected with the CPU (101).

4. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 1, wherein: the operation monitoring unit (6) comprises a temperature monitoring module (601), an oil level monitoring module (602), a vibration monitoring unit (603), an open-loop current sensor (604) and an SF6 gas transmitter (605), wherein the temperature monitoring module (601) is connected to the transformer, the temperature monitoring module (601) adopts a winding thermometer, and the temperature monitoring module (601) is connected with a transformer winding through an induction joint.

5. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 4, wherein: the oil level monitoring module (602) is installed on an insulating oil container of the transformer, the vibration monitoring unit (603) is installed on a transformer shell, and output ports of the temperature monitoring module (601), the oil level monitoring module (602) and the vibration monitoring unit (603) are all connected with the data collector (5).

6. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 4, wherein: the open-loop current sensor (604) is connected with a transformer wire, the SF6 gas transmitter (605) is installed with the transformer, and the SF6 gas sensor is arranged inside the SF6 gas transmitter (605).

7. The substation monitoring system capable of analyzing the operation performance of the transformer in real time according to claim 6, wherein: the output interfaces of the open-loop current sensor (604) and the SF6 gas transmitter (605) are simultaneously connected with the intelligent station online monitoring IED (7).

8. A transformer substation monitoring method capable of analyzing operation performance of a transformer in real time is characterized by comprising the following steps:

s1: monitoring the real-time operation of the transformer, and carrying out online monitoring on a plurality of transformers of the transformer substation;

s2: uploading transformer operation data in real time;

s3: constructing a historical fault database of the transformer;

s4: calculating and analyzing the fault of the transformer in real time;

s5: data display and alarm prompt.

9. The transformer substation monitoring method capable of analyzing the operation performance of the transformer in real time according to claim 8, wherein the transformer substation monitoring method comprises the following steps: in the step S2, the transformer operation data is uploaded through a UDP real-time transmission protocol and a 4G wireless communication network (4).

10. The transformer substation monitoring method capable of analyzing the operation performance of the transformer in real time according to claim 8, wherein the transformer substation monitoring method comprises the following steps: in the step S2, the transformer operation data are uploaded through the Ethernet in cooperation with the 4G wireless communication network (4).

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