CN210927844U - An intelligent monitoring system for substation equipment based on audio features - Google Patents

Abstract

The utility model discloses a substation equipment intelligent monitoring system based on audio frequency characteristics, which comprises an audio frequency acquisition device, a video frequency acquisition device, a signal processing unit, a time service unit, a sub-node power modem, a main power modem, a substation monitoring host, a DTU transmission unit and a centralized monitoring terminal; the utility model has good reliability, strong practicability and high intelligent degree, realizes the real-time monitoring of the audio condition of the electrical equipment of the transformer substation in the running state, and reduces the workload of the patrol personnel; the real-time monitoring of video information is realized, and meanwhile, a time service unit is arranged, so that the synchronism of video and audio acquisition time is ensured, and the accuracy of fault judgment is further improved; the electric power modem is used for directly realizing the transmission of audio and video information through the power line, and additional wiring is avoided.

Description

An intelligent monitoring system for substation equipment based on audio features

technical field

The utility model relates to the technical field of substation monitoring, in particular to an intelligent monitoring system for substation equipment based on audio features.

Background technique

The equipment in the substation will inevitably produce various sounds during operation, and the operating status and fault category of the equipment can be judged from the type and change of the sound; for example, when the transformer is in normal operation, the vibration of its built-in components will produce clear and regular vibrations In the same way, when the transformer has various faults, it will also produce corresponding sounds: for example, when there is a "grunt" sound similar to the boiling of liquid, it may be that the short-circuit current in the transformer winding causes the local overheating of the insulating oil. The intermittent "hehe" sound of the transformer may be due to the poor grounding of its built-in iron core. If the transformer is not tested at this time, it will easily lead to the expansion of the fault situation.

At present, the detection method of judging the operation state of the transformer by sound is mainly done manually, that is, the professional fault detection personnel listen to the sound generated by the operation through the insulating rod of the transformer; this method has higher requirements for the detection personnel, and There are many unstable factors, and remote real-time monitoring cannot be achieved.

Utility model content

In order to overcome the deficiencies in the background technology, the utility model discloses an intelligent monitoring system for substation equipment based on audio features. By monitoring the audio signals of each equipment in the substation in real time during operation, the online monitoring of the equipment operation status is realized, and the monitoring is carried out in conjunction with video monitoring. With cooperation, the accuracy of fault determination is improved.

To achieve the above object, the utility model adopts the following technical solutions:

An intelligent monitoring system for substation equipment based on audio features, comprising an audio acquisition device, a video acquisition device, a signal processing unit, a timing unit, a sub-node power cat, a main power cat, a substation monitoring host, a DTU transmission unit, and a centralized monitoring terminal; a substation Corresponding audio collection devices and video collection devices are installed for each equipment, the substation monitoring host is installed in the substation control room, and the centralized monitoring terminal is installed in the substation centralized control center; the audio collection devices and video collection devices are connected with the corresponding signal processing units, and the timing unit is in the upper position. The terminal is connected to the external high-precision timing source, and the lower terminal is connected to the signal processing unit; the signal processing unit is connected to the corresponding sub-node power cat, and the sub-node power cat is connected to the main power cat through the power line; the main power cat is connected to the substation monitoring host. The substation monitoring host is connected to the 4G network through the DTU transmission unit, and exchanges information with the centralized monitoring terminal connected to the Internet.

Further, the signal processing unit includes a signal conditioning circuit, a decoding module, a microprocessor, and a communication interface that are connected in sequence; the input ends of the signal conditioning circuit are respectively connected with the audio collection device and the video collection device, and the microprocessor is connected with the timing unit. , the communication interface is connected to the sub-node power cat.

Further, the signal conditioning circuit includes a band-pass filtering module and a signal amplifying module.

Further, the decoding module includes an audio decoding chip, a video decoding chip and peripheral circuits thereof.

Further, an intelligent monitoring system for substation equipment based on audio features is provided with an alarm, and the alarm is connected to a substation monitoring host.

Further, the audio collection device is a pickup.

Further, the video capture device is a camera.

Further, the external high-precision timing source connected to the upper end of the timing unit is a Beidou or GPS high-precision clock source.

Compared with the prior art, the beneficial effects of the present utility model are: an intelligent monitoring system for substation equipment based on audio features disclosed by the utility model has good reliability, strong practicability and high degree of intelligence, and realizes the realization of electrical equipment in substations. Real-time monitoring of audio conditions in running state reduces the workload of inspection staff; real-time monitoring of video information is realized, and a timing unit is set at the same time to ensure the synchronization of video and audio collection time, and further improve the accuracy of fault determination; Power cat, realizes the transmission of audio and video information directly through the power line, avoiding extra wiring.

Description of drawings

FIG. 1 is a schematic structural diagram of the intelligent monitoring system of the present invention.

In the figure: 1. Audio acquisition device; 2. Video acquisition device; 3. Signal processing unit; 4. Timing unit; 5. Sub-node power cat; 6. Main power cat; 7. Substation monitoring host; 8. DTU transmission unit 9, centralized monitoring terminal; 2-1, signal conditioning circuit; 2-2, decoding module; 2-3, microprocessor; 2-4, communication interface.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1, the present utility model provides a technical solution: an intelligent monitoring system for substation equipment based on audio features, comprising an audio acquisition device 1, a video acquisition device 2, a signal processing unit 3, a timing unit 4, and a sub-node power cat 5. Main power cat 6, substation monitoring host 7, DTU transmission unit 8, centralized monitoring terminal 9.

The audio acquisition device 1 and the video acquisition device 2 are connected to the corresponding signal processing unit 3, the upper end of the timing unit 4 is connected to an external high-precision timing source, and the lower end is connected to the signal processing unit 3; the signal processing unit 3 is connected to the corresponding sub-node power The cat 5 is connected, and the sub-node power cat 5 is connected to the main power cat 6 through the power line; the main power cat 6 is connected to the substation monitoring host 7, and the substation monitoring host 7 is connected to the 4G network through the DTU transmission unit.

Each equipment in the substation, such as detection transformers, capacitors, reactors, GIS gas-insulated switches, etc., is provided with corresponding audio acquisition device 1 and video acquisition device 2. Audio acquisition device 1 can be a pickup, and video acquisition device 2 can be a camera.

The signal processing unit 3 performs preprocessing such as filtering, amplifying, and decoding on the collected audio and video signals; the signal processing unit 3 includes a signal conditioning circuit 3-1, a decoding module 3-2, a microprocessor 3-3, Communication interface 3-4; the input ends of the signal conditioning circuit 3-1 are respectively connected with the audio collection device 1 and the video collection device 2, the microprocessor 3-3 is connected with the timing unit 4, and the communication interface 3-4 is connected with the sub-node power cat 5 connected.

The signal conditioning circuit 3-1 includes a band-pass filtering module and a signal amplifying module, which are used for filtering and amplifying the received audio and video analog signals.

The decoding module 3-2 includes an audio decoding chip, a video decoding chip and its peripheral circuits, which are used to decode the audio and video signals and output serial digital signals; the video decoding chip can choose TVP5146, which has powerful decoding function and supports various It is a common signal form for decoding; the audio decoding chip can choose TLV320AIC3101, which is a low-power serial audio codec chip, including multiple AGCs and programmable single-ended or fully differential configurations with multiple inputs and outputs.

Microprocessor 3-3 realizes the processing of audio and video signals, receives timing information, and determines the acquisition time of audio signals and video signals to ensure their synchronization; microprocessor 3-3 can choose TI DSP chip TMS320DM624. It has strong processing performance and high flexibility.

After the signal processing unit 3 completes the preprocessing, the audio, video and other signals corresponding to each equipment in the substation are sent to the corresponding sub-node power cat 5 using the communication interface 3-4; the signal output by the signal processing unit 3 is processed by the sub-node power cat. 5 is loaded on the power line, and is transmitted to the main power cat 6 by the power line. The main power cat 6 separates useful signals such as audio and video from the power line and transmits it to the substation monitoring host 7; The power cat uses the power line as a transmission medium to realize information communication, without the need for Perform extra wiring to save manpower and material resources.

The substation monitoring host 7 is set in the substation control room, and Advantech IPC610-MB-L model can be selected to complete the monitoring and fault judgment of the sound and video signals of various equipment in the substation; after the substation monitoring host 7 receives the audio and video signals, Perform spectrum analysis and feature extraction on the audio signal, and compare it with the fault audio database to determine whether the electrical equipment is faulty and the specific fault type; at the same time, the audio and video numbers are stored for subsequent statistical analysis and processing; The substation monitoring host 7 determines that there is a fault, and sends an alarm sound through the alarm to notify the staff. According to the fault judgment result, the staff can view the video information at the same time, and further confirm the cause and location of the fault, so as to deal with it in time.

The centralized monitoring terminal 9 is set in the substation centralized control center. The substation monitoring host 7 is connected to the 4G network through the DTU transmission unit 8, and performs remote communication with the centralized monitoring terminal 9 connected to the Internet, and sends the monitored audio, video, judgment results and other information. To the centralized monitoring terminal 9, at the same time, it can receive the relevant commands issued by the centralized monitoring terminal 9; the substation monitoring host 7 can perform remote communication with multiple substation monitoring hosts, so as to realize the centralized management and control of the multiple substations by the centralized monitoring terminal 9.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a substation equipment intelligent monitoring system based on audio frequency characteristic which characterized in that: the system comprises an audio acquisition device (1), a video acquisition device (2), a signal processing unit (3), a time service unit (4), a sub-node power modem (5), a main power modem (6), a transformer substation monitoring host (7), a DTU transmission unit (8) and a centralized monitoring terminal (9); each device of the transformer substation is provided with a corresponding audio acquisition device (1) and a corresponding video acquisition device (2), a transformer substation monitoring host (7) is arranged in a transformer substation control room, and a centralized monitoring terminal (9) is arranged in a transformer substation centralized control center; the audio acquisition device (1) and the video acquisition device (2) are connected with the corresponding signal processing unit (3), the upper end of the time service unit (4) is connected with an external high-precision time service source, and the lower end is connected with the signal processing unit (3); the signal processing unit (3) is connected with the corresponding sub-node electric modem (5), and the sub-node electric modem (5) is connected with the main electric modem (6) through a power line; the main power modem (6) is connected with the substation monitoring host (7), the substation monitoring host (7) is accessed into the 4G network through the DTU transmission unit, and information interaction is carried out between the substation monitoring host and the centralized monitoring terminal (9) accessed into the Internet.

2. The intelligent substation equipment monitoring system based on the audio features of claim 1, wherein: the signal processing unit (3) comprises a signal conditioning circuit (3-1), a decoding module (3-2), a microprocessor (3-3) and a communication interface (3-4) which are connected in sequence; the input end of the signal conditioning circuit (3-1) is respectively connected with the audio acquisition device (1) and the video acquisition device (2), the microprocessor (3-3) is connected with the time service unit (4), and the communication interface (3-4) is connected with the sub-node power modem (5).

3. The intelligent substation equipment monitoring system based on the audio features of claim 2 is characterized in that: the signal conditioning circuit (3-1) comprises a band-pass filtering module and a signal amplifying module.

4. The intelligent substation equipment monitoring system based on the audio features of claim 3 is characterized in that: the decoding module (3-2) comprises an audio decoding chip, a video decoding chip and peripheral circuits thereof.

5. The intelligent substation equipment monitoring system based on the audio features of claim 1, wherein: an alarm is arranged on an intelligent substation equipment monitoring system based on audio features and is connected with a substation monitoring host (7).

6. The intelligent substation equipment monitoring system based on the audio features of claim 1, wherein: the audio acquisition device (1) is a sound pickup.

7. The intelligent substation equipment monitoring system based on the audio features of claim 1, wherein: the video acquisition device (2) is a camera.

8. The intelligent substation equipment monitoring system based on the audio features of claim 1, wherein: and the external high-precision time service source connected with the upper end of the time service unit (4) is a Beidou or GPS high-precision clock source.

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