CN202393811U - On-line monitoring apparatus for lightning arrester for protecting series compensation capacitor - Google Patents

Abstract

The utility model provides an online monitoring device for a lightning arrester for series compensation capacitor protection, comprising an FPGA module, a main processor CPU module, a data acquisition module, an HMI display module, a FLASH memory, and a power supply module. The FPGA module passes through a high-speed parallel bus Connect the main processor CPU module, the main processor CPU module is connected with the HMI display module through the CAN bus, and at the same time connect the FLASH memory module, the power supply module and the data acquisition unit. The monitoring device of the utility model can realize the on-line monitoring of the leakage current and conduction current of the lightning arrester used for series compensation capacitor protection and the recording of the action of the lightning arrester.

Description

An online monitoring device for lightning arresters for series compensation capacitor protection

technical field

The utility model belongs to the field of lightning arrester detection and protection, and relates to an online monitoring device for a lightning arrester for series compensation capacitor protection.

Background technique

Multiple surge arresters for series compensation capacitor protection are connected in parallel. When connecting in parallel, the characteristics of the valve plates of the arresters are required to be consistent. Capacitor protection is monitored with arrester status. Develop a monitoring device for arresters used in series compensation capacitor protection to realize on-line monitoring of the leakage current and conduction current of the arrester on the series compensation platform and record the operation of the arrester. By monitoring the surge arrester leakage current waveform, the operation status and operation trend of the arrester can be analyzed, and some defects of the arrester can be found in time to reduce the occurrence of faults; by recording the conduction time and waveform of the arrester, it can be used for transformers, switchgear, busbars, etc. in substations. The cause of damage to electrical equipment provides the necessary basis for judgment.

Utility model content

The utility model provides an on-line monitoring device for a lightning arrester for series compensation capacitor protection, which realizes on-line monitoring of the leakage current and conduction current of the lightning arrester for series compensation capacitor protection and record of the action of the lightning arrester.

The technical scheme adopted in the utility model is:

An online monitoring device for a lightning arrester for series compensation capacitor protection, comprising an FPGA module, a main processor CPU module, a data acquisition module, an HMI display module, a FLASH memory, and a power supply module, and the FPGA module is connected to the main processor CPU through a high-speed parallel bus module, the main processor CPU module is connected with the HMI display module through the CAN bus, and at the same time connected with the FLASH memory module, the power supply module and the data acquisition unit.

The FPGA module outputs data to the communication receiving device through the Ethernet and optical fiber interface;

The specification of the communication receiving device is 9-1 or 9-2 protocol of IEC61850;

The FPGA module is further connected with a watchdog and a reset circuit.

The utility model has at least the following advantages: the monitoring device of the utility model can realize the state monitoring of the arrester used for series compensation capacitor protection, can detect defects of the arrester in time, avoid explosion of the arrester, and protect equipment and operation The safety of personnel, effectively preventing the occurrence of accidents, has great economic and social benefits, and can be widely used in the monitoring of arresters when arresters are connected in parallel. The monitoring device receives and processes the digital signal from the acquisition unit, processes the current analog input provided by the electromagnetic transformer, and can take into account the mixed application of the electronic transformer and the traditional transformer. It has 2 Ethernet electrical/optical 100base-Fx/10Base-FL data interfaces. After processing the data received from the acquisition unit, it sends it to the background monitoring system of the substation with the IEC61850 standard protocol to realize remote monitoring of the arrester status for series compensation capacitor protection. Terminal monitoring and unattended, in line with the development requirements of smart grid.

Description of drawings

Fig. 1 is a structural block diagram of the on-line monitoring device for the lightning arrester for series compensation capacitor protection of the present invention.

Detailed ways

The following is a detailed description of the arrester online monitoring device for series compensation capacitor protection of the present invention in conjunction with the accompanying drawings:

Please refer to Figure 1, an online monitoring device for arrester for series compensation capacitor protection, including FPGA module, main processor CPU module, data acquisition module, HMI display module, FLASH memory, watchdog and reset circuit, and power supply module . The FPGA module is connected to the main processor CPU module through a high-speed parallel bus, and outputs data through an Ethernet and an optical fiber interface. The main processor CPU module is connected with the HMI display module through the CAN bus, and is connected with the FLASH memory module, the watchdog/reset circuit and the power module at the same time.

The data collected by the data acquisition unit is transmitted to the FPGA module of the monitoring device through an optical fiber. The FPGA module is connected to the main processor CPU module through a high-speed parallel bus. The main processor CPU module processes the data and then transmits the data to the monitoring device through a high-speed parallel bus. FPGA module, the FPGA module transmits data to the communication receiving device through the Ethernet port or optical fiber interface, and the protocol of the communication receiving module can choose 9-1 and 9-2 protocols of IEC61850.

As shown in Figure 1, the main processor CPU module performs calculations on the received data, and at the same time transmits the data to the HMI module for display through the CAN bus. read for analysis. The capacity of the FLASH memory is large enough to store enough data for users to read and analyze.

As shown in Figure 1, the watchdog and reset circuit automatically resets the CPU module of the main processor when the program of the CPU module of the main processor runs wrong, so as to ensure its normal operation.

As shown in Figure 1, the HMI display module performs data interaction with the main processor CPU module through the CAN bus. When the user changes the parameters on the man-machine interface, the HMI display module transmits the changed parameters to the main processor CPU module, and the main processor The processor CPU module performs processing and storage, and then returns to the HMI display module. The LED indicators on the HMI display module can accurately and intuitively indicate the operating status of the monitoring and analysis unit, and can also record corresponding SOE events so that users can query the operating records. The HMI display module can also allow the main processor CPU module to read the data of the FLASH memory through the CAN bus, display real-time monitoring of the leakage current of the arrester, record waveform data, record the number of times the arrester operates, and the action waveform when the arrester operates. The communication between the monitoring device and the host computer adopts the IEC61850 format (optional 9-1 and 9-2).

The above is only one embodiment of the utility model, not all or the only implementation. Any equivalent transformation adopted by those of ordinary skill in the art to the technical solution of the utility model by reading the specification of the utility model shall be considered as the present invention. covered by the claims of the utility model.

Claims (4)

1. the lightning arrester on-Line Monitor Device is used in a series capacitor compensation protection; It is characterized in that: comprise FPGA module, primary processor CPU module, data acquisition module, HMI display module, FLASH storer; And power module; Said FPGA module connects primary processor CPU module through high speed parallel bus, and primary processor CPU module is connected with the HMI display module through the CAN bus, connects FLASH memory module and power module and data acquisition unit simultaneously.

2. the lightning arrester on-Line Monitor Device is used in a kind of series capacitor compensation protection as claimed in claim 1, and it is characterized in that: said FPGA module is given the communication receiving trap through Ethernet and optical fiber interface output data.

3. the lightning arrester on-Line Monitor Device is used in a kind of series capacitor compensation protection as claimed in claim 2, and it is characterized in that: the specification of said communication receiving trap is 9-1 or the 9-2 agreement of IEC61850.

4. the lightning arrester on-Line Monitor Device is used in a kind of series capacitor compensation protection as claimed in claim 1, and it is characterized in that: said FPGA module further is connected with house dog and reset circuit.

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