CN212622858U

CN212622858U - Intelligent telemotive of transformer substation IRIG-B sign indicating number output integrated circuit board

Info

Publication number: CN212622858U
Application number: CN202021122828.1U
Authority: CN
Inventors: 张海永; 刘升鹏; 钱威; 高承贵
Original assignee: Nanjing Taisi De Intelligent Electric Co ltd
Current assignee: Nanjing Taisi De Intelligent Electric Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-02-26
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses an intelligent telecontrol equipment IRIG-B sign indicating number output integrated circuit board of transformer substation, including FPGA module, PCIe interface circuit, optic fibre output circuit and RS-485 interface circuit all are connected to the FPGA module. The utility model discloses PCIe integrated circuit board based on FPGA chip, simple structure does not influence tester outward appearance and overall structure, and convenient to use can improve output synchronizing signal's precision to 1ms rank, provides accurate time reference for the automatic test of distant motivation.

Description

Intelligent telemotive of transformer substation IRIG-B sign indicating number output integrated circuit board

Technical Field

The utility model relates to a transformer substation's intelligence telemechanical IRIG-B sign indicating number output integrated circuit board belongs to intelligence telemechanical test system technical field.

Background

With the rapid development of the power industry, the power dispatching automation system is also constructed on a large scale and gradually occupies a more important position. The remote motor is an important link for connecting the main station with the substation system, and all data collected by the substation equipment are uploaded to the main station through the remote motor for analysis and use by the main station. And the operation command of the main station to the substation equipment also reaches the substation automation equipment through the telecontrol machine.

Under the background of secondary integration construction of a southern power grid, a panoramic data center needs to be built in a master station, all professional data need to be integrated, and a transformer substation needs to realize unified data acquisition, processing, storage, transmission and the like, so that the intelligent remote motivation is greatly popularized and applied, the transformer substation with more than 35kV needs to be redundantly configured, and the south network requires all 500kV transformer substations to be additionally provided with the intelligent remote motivation.

Aiming at the problems that the intelligent remote control machine lacks means for testing functions and performance during commissioning and maintenance and can only be tested by depending on a field device, a platformization, interface and script testing method is researched, development of a testing system is completed by depending on a testing platform and applying a modern computer technology, and the functions and the performance of the intelligent remote control machine are automatically tested.

The intelligent telecontrol tester automatically tests and needs to ensure the time synchronization of the telecontrol machine and the tester. The tester simulates a telecontrol main station to send a remote control command to the telecontrol machine, the telecontrol machine needs to record the remote control command and record time, and the time precision requirement is 1ms level.

The current tester based on the Windows industrial personal computer only supports the SNTP technology to carry out time synchronization on the telemechanical, the SNTP time synchronization technology only can provide 1-50ms time synchronization precision, and the time precision requirement of the automatic test of the intelligent telemechanical cannot be met in some scenes.

The tester can also realize the time synchronization of the tester and the intelligent remote machine in a mode of being matched with an external clock synchronization device, but the scheme makes the test system more complex, has more operation flows and is not easy to carry, and simultaneously improves the hardware cost of the whole test system.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the utility model provides a transformer substation's intelligence telemotive IRIG-B sign indicating number output integrated circuit board to solve the problem that exists among the prior art.

The utility model discloses the technical scheme who takes does: an IRIG-B code output board card of an intelligent telemotive machine of a transformer substation comprises an FPGA module, a PCIe interface circuit, an optical fiber output circuit and an RS-485 interface circuit, wherein the PCIe interface circuit, the optical fiber output circuit and the RS-485 interface circuit are all connected to the FPGA module.

Preferably, the FPGA module includes an FPGA chip, a power circuit and a crystal oscillator circuit, and the power circuit and the crystal oscillator circuit are connected to the FPGA chip.

Preferably, the PCIe interface circuit is an X4 interface circuit supporting PCIe 4.0 specification, and is a hardware interface between the board and the tester motherboard.

Preferably, the optical fiber output interface circuit includes a driving circuit and an optical fiber transmitting module, the driving circuit connects the IRIG-B code signal to the optical fiber transmitting module, and the optical fiber transmitting module is configured to output an optical signal with a wavelength of 820 nm.

Preferably, the RS-485 output interface circuit comprises an isolation circuit and an RS-485 interface circuit, and the isolation circuit isolates the IRIG-B code signal by 2KV insulated voltage and outputs the IRIG-B code signal to the RS-485 interface circuit.

The utility model has the advantages that: compared with the prior art, the utility model discloses an effect as follows:

1. the utility model discloses extended the PCIe integrated circuit board in the tester based on Windows industrial computer, output IRIG-B sign indicating number to the time signal, adopt the FPGA module to increase the time delay compensation to the board and tester PCIe communication simultaneously, very big improvement the tester with surveyed the time to the precision of telemechanical, can reach 1ms rank;

2. the utility model uses the PCIe expansion board card, which can be directly inserted into the PCIe slot tested by the industrial personal computer, thus not affecting the appearance of the tester, all time setting configuration can be automatically completed by tester software, the operation is simple, no extra wiring is needed, and the cost of the test system is greatly saved;

3. the utility model discloses exportable multichannel optic fibre synchronizing signal and RS-485 synchronizing signal can provide synchronizing signal for many intelligence telemotive simultaneously.

Drawings

Fig. 1 is a functional block diagram of an IRIG-B code output board card for an intelligent telemechanical automation tester of a transformer substation.

Fig. 2 is a schematic diagram illustrating PCIe communication delay calculation of the FPGA time processing module.

FIG. 3 is a state machine of the IRIG-B encoding module.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1-3, an IRIG-B code output board card for an intelligent remote machine of a transformer substation comprises an FPGA module, a PCIe interface circuit, an optical fiber output circuit, and an RS-485 interface circuit, wherein the PCIe interface circuit, the optical fiber output circuit, and the RS-485 interface circuit are all connected to the FPGA module.

Preferably, the FPGA module comprises an FPGA chip with model number EP4CGX75CF23C8, a power circuit and a crystal oscillator circuit, and the power circuit and the crystal oscillator circuit are connected to the FPGA chip.

Preferably, the FPGA module is provided with a time processing module and a B code encoding module, the time processing module is connected with the B code encoding module, the time processing module is connected to a PCIe interface circuit, and the B code encoding module is connected to the optical fiber output circuit and the RS-485 interface circuit.

The time processing module comprises 3 functions of PCIe message processing, PCIe communication delay calculation and a time information cache region, performs data interaction with automatic test software through a PCIe interface to acquire tester time, calculates PCIe interaction delay through a ping-pong principle, performs delay compensation, and writes the compensated time into the time information cache region.

As shown in fig. 2, the time processing module initiates a read time information request to the tester host through PCIe memory read operation at time T1; the tester host records the current time T2 after receiving the request information; the tester host writes the T2 time into a response message; the tester host sends a response message at T3 time; the time processing module receives the response message at time T4.

The time processing module calculates PCIe communication delay Td = ((T4-T1) - (T3-T2))/2.

The time processing module averages the communication delay data obtained by multiple times of calculation so as to reduce the random error of the system.

The time processing module uses T4+ Td as the current time of the board and writes the current time into the time information buffer.

The RIG-B coding module comprises a whole second time calculation function and an IRIG-B coding sending function; and the IRIG-B coding module reads the time information stored in the time information buffer area, updates the current millisecond value, and starts the IRIG-B code coding state machine shown in the figure 3 when the millisecond counter reaches 990, namely the time of a whole second.

Example 2: as shown in fig. 1 to 3, a method for using an IRIG-B code output board card of a substation intelligent telemotive machine includes: when the telecontrol machine is subjected to closed-loop automatic test, the board card works in a PCIe slot of a mainboard of the industrial personal computer, the time processing module acquires the time of the tester through a PCIe interface and performs delay compensation, and the IRIG-B code is output to synchronize the telecontrol machine to be tested.

Preferably, the time processing module performs data interaction with the tester through a PCIe interface to obtain tester time, calculates PCIe interaction delay through a ping-pong principle, performs delay compensation, and writes the compensated time into the time information cache region.

Preferably, the time processing module initiates a read time information request to the tester host through PCIe memory read operation at time T1, the tester host records current time T2 after receiving the request information, the tester host writes time T2 into a response packet, the tester host sends the response packet at time T3, the time processing module receives the response packet at time T4, the time processing module calculates PCIe communication delay time Td = ((T4-T1) - (T3-T2))/2, the time processing module averages communication delay data obtained through multiple calculations, uses T4+ Td as board current time, and writes the board current time into the time information buffer.

Preferably, the IRIG-B encoding module calculates the time of the whole second according to the read time information of the time information buffer area, encodes the time in an IRIG-B format, and outputs the time through the optical fiber output interface circuit and the RS-485 interface circuit.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides a transformer substation's intelligence telemotive IRIG-B sign indicating number output integrated circuit board which characterized in that: the PCIe interface circuit, the optical fiber output circuit and the RS-485 interface circuit are all connected to the FPGA module.

2. The IRIG-B code output board card of the intelligent remote movement machine of the transformer substation according to claim 1, characterized in that: the FPGA module comprises an FPGA chip, a power circuit and a crystal oscillator circuit, and the power circuit and the crystal oscillator circuit are connected to the FPGA chip.

3. The IRIG-B code output board card of the intelligent remote movement machine of the transformer substation according to claim 1, characterized in that: the PCIe interface circuit is an X4 interface circuit supporting PCIe 4.0 specification, and is a hardware interface between a board card and a tester motherboard.

4. The IRIG-B code output board card of the intelligent remote movement machine of the transformer substation according to claim 1, characterized in that: the optical fiber output interface circuit comprises a driving circuit and an optical fiber sending module, wherein the driving circuit connects the IRIG-B code signal to the optical fiber sending module, and the optical fiber sending module is used for outputting an optical signal with 820nm wavelength.

5. The IRIG-B code output board card of the intelligent remote movement machine of the transformer substation according to claim 1, characterized in that: the RS-485 output interface circuit comprises an isolation circuit and an RS-485 interface circuit, and the isolation circuit isolates the IRIG-B code signal by 2KV insulated voltage and outputs the IRIG-B code signal to the RS-485 interface circuit.