Integrated built-in sensor combined acquisition system for GIS equipment

Abstract

The invention relates to an integrated built-in sensor combined acquisition system for GIS equipment. The integrated built-in sensor combined acquisition system comprises a core control unit, an analog-to-digital conversion unit, an internal interface unit, an external interface unit, a system power supply unit and an upper computer, the external interface unit is connected with the internal interface unit, the internal interface unit is connected with the analog-to-digital conversion unit, the analog-to-digital conversion unit is connected with the core control unit, the core control unit is connected with the upper computer, and the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the upper computer are all connected with the system power supply unit; the core control unit is used for processing and operating high-speed data streams; the analog-to-digital conversion unit is used for converting continuous analog signals into discrete digital signals; the internal interface unit is used for data synchronous transmission; by arranging the core control unit, synchronous acquisition and rapid analysis processing of different time scale parameters are realized based on multi-channel synchronous sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment status monitoring, and in particular to an integrated built-in sensor joint acquisition system for GIS equipment. Background Art

[0002] At present, gas insulated switchgear (GIS) is often subjected to the superposition of transient overvoltage (operation, lightning, VFTO) and power frequency operating voltage during operation. On the one hand, the superimposed high-amplitude transient voltage will stimulate the latent defects inside the GIS equipment to produce partial discharge, which will continue to develop under the continuous power frequency operating voltage, causing sudden insulation breakdown accidents of GIS equipment; on the other hand, it will promote the rapid development of existing weak partial discharges, causing the insulation performance of the equipment to decline rapidly. At the same time, the superimposed voltage will also be affected by the gas pressure, trace water and other gas states inside the equipment. Therefore, the accurate detection and analysis of the insulation state of GIS equipment requires simultaneous attention to multiple parameters such as transient voltage, partial discharge and gas state. Its correlation analysis reflects the complexity of influencing factors, the richness of indicator sources, and the nonlinearity of structural levels.

[0003] However, the time scales of parameters obtained by the integrated "transient voltage-partial discharge-gas state" sensor used in GIS equipment vary greatly, including slow parameters of the gas state and ultra-high frequency signals with frequencies as high as 3 GHz. It is difficult for the joint perception system to achieve synchronous collection of multi-channel parameters. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an integrated built-in sensor joint acquisition system for GIS equipment, which has the advantage of being able to achieve synchronous acquisition and rapid analysis and processing of parameters of different time scales based on multi-channel synchronous sampling.

[0005] The above-mentioned invention object of the present invention is achieved through the following technical scheme: an integrated built-in sensor joint acquisition system for GIS equipment, including a core control unit, an analog-to-digital conversion unit, an internal interface unit, an external interface unit, a system power supply unit and a host computer; the external interface unit is connected to the internal interface unit, the internal interface unit is connected to the analog-to-digital conversion unit, the analog-to-digital conversion unit is connected to the core control unit, the core control unit is connected to the host computer, and the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer are all connected to the system power supply unit; the core control unit is used for processing and calculating high-speed data streams; the analog-to-digital conversion unit is used to convert continuous analog signals into discrete digital signals; the internal interface unit is used for synchronous data transmission; the external interface unit is used to establish a connection between an external sensor and the core control unit, and transmit data simultaneously; the system power supply unit is used to power the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer; the host computer is used to display the current detection results through a human-computer interaction interface.

[0006] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the core control unit includes a data acquisition processing module and a DSP module, the DSP module is connected to the data acquisition processing module through an interactive machine; the DSP module is communicatively connected to the host computer.

[0007] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the data acquisition processing module includes a multi-channel high-speed ADC and an FPGA acquisition control module, and the multi-channel high-speed ADC is communicatively connected to the FPGA acquisition control module.

[0008] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the analog-to-digital conversion unit adopts a multi-chip multi-channel A / D converter.

[0009] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the sampling rate of the analog-to-digital conversion unit is greater than or equal to 100MS / s.

[0010] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the internal interface unit adopts a source synchronous interface to synchronize data and clock transmission.

[0011] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the source synchronous interface adopts LVDS level transmission.

[0012] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the external interface unit adopts TCP protocol transmission.

[0013] Preferably, the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention has vacant slots in the box, and when parameter indicators are changed or new functions are added, the vacant slots are used to install new data acquisition and processing modules.

[0014] Preferably, in the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the system power supply unit adopts a +12V power supply.

[0015] Preferably, the integrated built-in sensor joint acquisition system for GIS equipment provided by the present invention, the host computer is used to call the developed intelligent diagnosis algorithm to realize intelligent diagnosis of the equipment status, and at the same time, according to the current status of the equipment, timely early warning is issued through the communication system to realize efficient management of the detection data.

[0016] In summary, the beneficial technical effects of the present invention are as follows: the integrated built-in sensor joint acquisition system for GIS equipment provided by the present application includes a core control unit, an analog-to-digital conversion unit, an internal interface unit, an external interface unit, a system power supply unit and a host computer; the external interface unit is connected to the internal interface unit, the internal interface unit is connected to the analog-to-digital conversion unit, the analog-to-digital conversion unit is connected to the core control unit, the core control unit is connected to the host computer, and the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer are all connected to the system power supply unit; the core control unit is used for processing and calculating high-speed data streams; the analog-to-digital conversion unit is used to convert continuous analog signals into discrete digital signals; the internal interface unit is used for synchronous data transmission; the external interface unit is used to establish a connection between an external sensor and the core control unit, and to establish data transmission; the system power supply unit is used to power the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer; the host computer is used to display the current detection results through a human-computer interaction interface; by setting the core control unit, based on the synchronous sampling of multi-channel data, the synchronous acquisition and rapid analysis and processing of parameters of different time scales are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall structural block diagram of an integrated built-in sensor joint acquisition system for GIS equipment provided by an embodiment of the present invention.

[0018] Figure 2 It is a structural block diagram of the connection between a core control unit and a host computer in an integrated built-in sensor joint acquisition system for GIS equipment provided by an embodiment of the present invention.

[0019] In the figure, 1. integrated built-in sensor joint acquisition system; 10. core control unit; 101. data acquisition processing module; 1011. multi-channel high-speed ADC; 1012. FPGA acquisition control module; 102. DSP module; 20. analog-to-digital conversion unit; 30. backplane bus; 40. system power supply unit; 50. host computer; 60. internal interface unit; 70. external interface unit; 80. box; 81. accommodating cavity. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 , is an integrated built-in sensor joint acquisition system 1 for GIS equipment disclosed in the present invention, comprising a core control unit 10, an analog-to-digital conversion unit 20, an internal interface unit 60, an external interface unit 70, a system power supply unit 40 and a host computer 50; the external interface unit 70 is connected to the internal interface unit 60, the internal interface unit 60 is connected to the analog-to-digital conversion unit 20, the analog-to-digital conversion unit 20 is connected to the core control unit 10, the core control unit 10 is connected to the host computer 50, the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the external interface unit 70 and the host computer 50 are all connected to the system power supply unit 40; the core control unit 10 is used to Processing and calculation of high-speed data streams; the analog-to-digital conversion unit 20 is used to convert continuous analog signals into discrete digital signals; the internal interface unit 60 is used for synchronous data transmission; the external interface unit 70 is used to establish a connection between an external sensor and the core control unit 10, and to establish data transmission; the system power supply unit 40 is used to supply power to the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the external interface unit 70 and the host computer 50; the host computer 50 is used to display the current detection results through the human-computer interaction interface; by setting the core control unit 10, based on the synchronous sampling of multi-channel data, the synchronous collection and rapid analysis and processing of parameters of different time scales are realized.

[0022] Among them, the integrated built-in sensor joint acquisition system 1 for GIS equipment provided in this embodiment also includes a box 80, the box 80 is surrounded by a housing cavity 81, the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the system power supply unit 40, the host computer 50 and the backplane bus 30 are all arranged in the housing cavity 81, the external interface unit 70 is arranged on the outer wall of the box 80, and the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the system power supply unit 40 and the host computer 50 are all connected to the backplane bus 30; by setting the box 80, integration is achieved.

[0023] Specifically, the backplane bus 30 is used for communication between the units and supports star and dual star topologies.

[0024] In this embodiment, the host computer 50 reads the sampling data analysis results through the network port. The host computer 50 is used to call the developed intelligent diagnosis algorithm to realize intelligent diagnosis of the equipment status. At the same time, according to the current status of the equipment, timely early warning is issued through the communication system, thereby realizing efficient management of the detection data.

[0025] Continue to refer to Figure 1 and Figure 2 In this embodiment, the core control unit 10 includes a data acquisition processing module 101 and a DSP module 102 . The DSP module 102 is connected to the data acquisition processing module 101 through an interactive machine; and the DSP module 102 is connected to the host computer 50 for communication.

[0026] Among them, the external sensor data is transmitted to the integrated built-in sensor joint acquisition system 1 through the external interface unit 70, and the synchronous transmission of data and clock is realized through the internal interface unit 60. The original high-speed data stream is connected in the form of a continuous analog signal, and the analog-to-digital conversion unit 20 converts the continuous analog signal into a discrete digital signal to form a high-speed data stream, which is transmitted to the core control unit for processing and calculation.

[0027] Furthermore, in this embodiment, the data acquisition processing module 101 includes a multi-channel high-speed ADC 1011 and an FPGA acquisition control module 1012 , and the multi-channel high-speed ADC 1011 and the FPGA acquisition control module 1012 are communicatively connected.

[0028] Specifically, the data acquisition and processing module 101 is designed in strict accordance with the AMC.0 standard and is divided into a channel conditioning part and an acquisition and processing part. In the acquisition process, the analog signal is sampled by carrying a multi-channel high-speed ADC 1011, and the high-speed data stream is pre-processed in the FPGA acquisition control module 1012, such as data reception and deserialization.

[0029] Among them, the FPGA acquisition control module 1012 is a field programmable gate array, which has the characteristics of programmability, repeated erasure and a large number of pins, and is used to issue control instructions; the DSP module 102 has a high-performance computing core inside for data processing and network control.

[0030] The FPGA acquisition control module 1012 can configure the hardware connection inside the chip according to the functional requirements to meet the requirements at the fastest speed or with the least resources. The FPGA acquisition control module 1012 controls analog-to-digital conversion and cache data, and transmits the cached acquisition data to the DSP module 102. Finally, the DSP module 102 communicates with the host computer 50 through the network port.

[0031] Specifically, the DSP module 102 is connected to the data acquisition processing module 101 through a switch as the control and processing center of the acquisition system. The DSP module 102 reads the pre-processed sampled data and stores it in the module memory. The DSP module 102 is equipped with a dual-core high-performance DSP chip, which can support real-time embedded high-speed digital signal processing.

[0032] The DSP module 102 has a high degree of programmability and high real-time performance in data processing and calculation.

[0033] Furthermore, in this embodiment, the analog-to-digital conversion unit 20 uses a multi-chip multi-channel A / D converter; such a configuration automatically realizes the monitoring of partial discharge signals, transient voltages, power frequency signals, and gas states.

[0034] The sampling rate of the analog-to-digital conversion unit 20 is greater than or equal to 100 MS / s.

[0035] Exemplarily, the analog-to-digital conversion unit 20 uses a 4-channel 14-bit A / D converter for synchronous acquisition, and automatically realizes the monitoring of partial discharge signals, transient voltages, power frequency signals, and gas status.

[0036] Furthermore, in this embodiment, the internal interface unit 60 adopts a source synchronous interface to enable synchronous transmission of data and clock.

[0037] Specifically, the internal interface unit 60 adopts a source synchronous interface. While transmitting data, a clock synchronized with the data is transmitted to the downstream of the interface, and the downstream uses the clock to sample the input data. During the entire transmission process, the data and the clock maintain a fixed phase relationship, thereby ensuring synchronous transmission of the data streams under the multi-card slots.

[0038] Furthermore, in this embodiment, the source synchronous interface adopts LVDS level transmission.

[0039] Specifically, the source synchronous interface uses LVDS level transmission, and the transmission rate can reach hundreds of Mbps or even 1.25Gbps. The transmitter of the source synchronous interface converts multi-bit parallel data into serial data, transmits the serial data stream using the LVDS differential interface, and restores the serial data stream to the original parallel data using a specific clock at the receiver.

[0040] Furthermore, in this embodiment, the external interface unit 70 adopts TCP protocol transmission, and the TCP protocol transmission is used to connect the integrated built-in sensor joint acquisition system 1 with the external sensor, that is, the TCP protocol transmission is used to establish a connection between the external sensor and the core control unit 10.

[0041] During use, a connection is first established, and then data is transmitted through the TCP protocol.

[0042] Furthermore, in this embodiment, a vacant slot is provided in the box body 80 , and when a parameter index is changed or a new function is added, the vacant slot is used to install a new data acquisition and processing module 101 .

[0043] Specifically, when parameter indicators are changed or new functions are added, the modules can be redesigned accordingly, the functions can be expanded according to actual needs, and a new data acquisition processing module 101 can be added to improve acquisition efficiency and perform high-speed real-time digital signal processing.

[0044] Furthermore, in this embodiment, the system power supply unit 40 adopts a +12V power supply.

[0045] Specifically, due to the large number of chips used, multiple voltages are required, including: 3.3V digital voltage of FPGA acquisition control module 1012; ±2.5V digital voltage and ±5V analog voltage of analog-to-digital conversion unit 20; 3.3V voltage of network port physical layer chip, etc.

[0046] Among them, the integrated built-in sensor joint acquisition system 1 for GIS equipment provided in this embodiment is based on the MicroTCA architecture specification in the telecommunications field, adopts a standard modular architecture, and effectively realizes the synchronous acquisition and real-time transmission functions of transient voltage signals, industrial frequency voltage signals, optical signals and gas states.

[0047] The working principle of the integrated built-in sensor joint acquisition system 1 for GIS equipment provided in this embodiment is as follows: establish a connection between the external sensor and the data acquisition processing module 101 through the external interface unit 70, and transmit data through the TCP protocol; synchronize data and clock transmission through the internal interface unit 60; the original high-speed data stream is connected in the form of a continuous analog signal, and the analog-to-digital conversion unit 20 converts the continuous analog signal into a discrete digital signal to form a high-speed data stream, which is transmitted to the data acquisition processing module 101. After the data acquisition processing module 101 completes the data acquisition, it is necessary to complete the data separation: separate the transient voltage and the power frequency voltage from the collected voltage signal, and extract the partial discharge signal. The analog-to-digital conversion unit 20 uses a 4-channel 14-bit A / D converter for synchronous acquisition, and automatically realizes the monitoring of partial discharge signals, transient voltages, power frequency signals, and gas states. For transient overvoltage and partial discharge ultra-high frequency pulse signals, they change rapidly and the generation of signals is highly random. During the actual operation of the equipment, the acquisition of signals requires an extremely high sampling rate, but at the same time, the signals cannot be acquired continuously for a long time, because the continuous signal obtained contains only very little pulse information, and most of the remaining information is redundant and useless information. Therefore, when storing these signals, it is necessary to identify the pulse signal and transmit and store the key information through the DSP module 102; the system has real-time preprocessing of different data and transient voltage and partial discharge random pulse identification methods, which can separate transient overvoltage from power frequency voltage and partial discharge pulse signals from background noise, and realize the functions of efficient data management and real-time diagnosis of GIS equipment status.

[0048] The integrated built-in sensor joint acquisition system 1 for GIS equipment provided in the present application includes a core control unit 10, an analog-to-digital conversion unit 20, an internal interface unit 60, an external interface unit 70, a system power supply unit 40 and a host computer 50; the external interface unit 70 is connected to the internal interface unit 60, the internal interface unit 60 is connected to the analog-to-digital conversion unit 20, the analog-to-digital conversion unit 20 is connected to the core control unit 10, the core control unit 10 is connected to the host computer 50, the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the external interface unit 70 and the host computer 50 are all connected to the system power supply unit 40; the core control unit 10 is used for high-speed data flow Processing and calculation; the analog-to-digital conversion unit 20 is used to convert continuous analog signals into discrete digital signals; the internal interface unit 60 is used for synchronous data transmission; the external interface unit 70 is used to establish a connection between the external sensor and the core control unit 10, and establish data transmission through the TCP protocol; the system power supply unit 40 is used to supply power to the core control unit 10, the analog-to-digital conversion unit 20, the internal interface unit 60, the external interface unit 70 and the host computer 50; the host computer 50 is used to display the current detection results through the human-computer interaction interface; by setting the core control unit 10, based on the synchronous sampling of multi-channel data, the synchronous collection and rapid analysis and processing of parameters of different time scales are realized.

[0049] The integrated built-in sensor joint acquisition system 1 for GIS equipment provided by the present invention has the following advantages: the system has the characteristics of high precision, high speed, multi-channel and large bandwidth.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0051] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An integrated built-in sensor joint acquisition system for GIS equipment, characterized in that: It includes a core control unit, an analog-to-digital conversion unit, an internal interface unit, an external interface unit, a system power supply unit and a host computer; The external interface unit is connected to the internal interface unit, the internal interface unit is connected to the analog-to-digital conversion unit, the analog-to-digital conversion unit is connected to the core control unit, the core control unit is connected to the host computer, and the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer are all connected to the system power supply unit; The core control unit is used for processing and computing high-speed data streams; The analog-to-digital conversion unit is used to convert a continuous analog signal into a discrete digital signal; The internal interface unit is used for synchronous data transmission; The external interface unit is used to establish a connection between the external sensor and the core control unit, and to establish data transmission; The system power supply unit is used to supply power to the core control unit, the analog-to-digital conversion unit, the internal interface unit, the external interface unit and the host computer; The host computer is used to display the current test results through a human-computer interaction interface.

2. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The core control unit includes a data acquisition processing module and a DSP module, and the DSP module is connected to the data acquisition processing module through an interactive machine; The DSP module is communicatively connected with the host computer.

3. The integrated built-in sensor joint data collection system for GIS equipment according to claim 2, characterized in that: The data acquisition processing module includes a multi-channel high-speed ADC and an FPGA acquisition control module, and the multi-channel high-speed ADC is communicatively connected with the FPGA acquisition control module.

4. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The analog-to-digital conversion unit adopts a multi-chip multi-channel A / D converter.

5. The integrated built-in sensor joint data collection system for GIS equipment according to claim 4, characterized in that: The sampling rate of the analog-to-digital conversion unit is greater than or equal to 100 MS / s.

6. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The internal interface unit adopts a source synchronous interface to enable data and clock to be transmitted synchronously.

7. The integrated built-in sensor joint data collection system for GIS equipment according to claim 6, characterized in that: The source synchronous interface adopts LVDS level transmission.

8. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The external interface unit adopts TCP protocol transmission.

9. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The box body is provided with a vacant slot, and when a parameter index is changed or a new function is added, the vacant slot is used to install a new data acquisition and processing module.

10. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The system power supply unit adopts a +12V power supply.

11. The integrated built-in sensor joint data collection system for GIS equipment according to claim 1, characterized in that: The host computer is used to call the developed intelligent diagnosis algorithm to realize intelligent diagnosis of the equipment status. At the same time, according to the current status of the equipment, early warning is issued in time through the communication system to realize efficient management of the detection data.

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