CN205374621U - Automatic change digit relay protection of transformer substation tester - Google Patents

Abstract

The utility model discloses a digital relay protection tester for an automatic substation, which comprises a central processing unit and a time synchronization unit, a light output/input unit and a small signal output unit respectively connected thereto; the central processing unit is used for communication with an industrial computer Heguang digital part input and output, synchronization and communication with CPU, time synchronization and small signal output; the utility model can automatically read the fixed value of the protection device, measurement and control device, and intelligent terminal; can communicate consistently with the protection device, measurement and control device, and intelligent terminal sex is checked.

Description

An automatic substation digital relay protection tester

technical field

The utility model relates to substation equipment, in particular to an automatic substation digital relay protection tester.

Background technique

Domestic smart substations are currently in the stage of comprehensive construction. Protection devices, measurement and control devices, and smart terminals are key components of smart substations, and their performance directly affects the reliability of substations and even smart grid operations. The working principle of protection devices, measurement and control devices, and smart terminals is: the electronic transformers and circuit breakers at the process level of smart substations are connected to protection devices, measurement and control devices, and smart terminals through optical fibers, and the protection devices, measurement and control devices, and smart terminals are transmitted through optical fibers. Digital signal and switch signal, carry out corresponding action.

At present, the existing digital relay protection tester is a test instrument based on a single protection test item, and can test protection devices, measurement and control devices, and intelligent terminals during the test. However, according to the on-site debugging experience, especially the debugging of protection devices, measurement and control devices, and intelligent terminal monomers, the existing digital relay protection tester for smart substations is used for single debugging of protection devices, measurement and control devices, and intelligent terminals. Often need to consume a lot of manpower and time. Because the commissioning personnel need to continuously test each test item according to the SCD file of the whole station, and at the same time, the existing smart substation digital relay protection tester cannot check the consistency of the protection device, measurement and control device, and smart terminal communication. Therefore, the existing digital relay protection tester mainly has the following deficiencies:

1. The existing smart substation digital relay protection tester cannot check the communication consistency of protection devices, measurement and control devices, and smart terminals;

2. The existing digital relay protection tester cannot be intelligent, that is, the setting of each test type needs to be calculated by the debugger and manually input into the tester;

3. The existing digital relay protection tester cannot automatically read the fixed value of the protective device, measurement and control device, and intelligent terminal during the test process, that is, the fixed value setting of each test type needs to be checked and protected by the debugger The fixed value parameters of the device are manually input to the tester;

4. The analog signal output by the existing digital relay protection tester cannot be directly recognized by the substation and needs to be converted.

Utility model content

The utility model provides a test scheme capable of testing the protection device, testing device and intelligent terminal of the intelligent substation, and can import the SCD model file of the whole station to automatically set the test plan for the protection device, the measurement and control device and the intelligent terminal of the intelligent substation and simulate the scene The actual situation and fault, the output conforms to the protocol of the smart substation or simulates the error of the message to check the consistency and reliability of the communication of the protection device, the measurement and control device, and the smart terminal. It is a digital relay protection tester for smart substations.

The technical solution adopted by the utility model is: an automatic substation digital relay protection tester, including a central processing unit and a time synchronization unit, an optical output/input unit and a small signal output unit respectively connected to it;

Described central processing unit comprises two processing modules of ADSP+FPGA; ADSP comprises BF518 processor, as main control CPU, is used for communication with industrial computer and optical digital part input and output; FPGA comprises XC3S500E and is used for synchronizing and communicating with CPU, pair time and small signal output;

The time synchronization unit includes a GPS module, an IRIG-B code time synchronization module and an IEEE1588 time synchronization module; the GPS module and the IEEE1588 time synchronization module are connected to the BF518 respectively; the GPS module, the IRIG-B code time synchronization module and the IEEE1588 time synchronization module are all Connect with FPGA;

The optical output/input unit includes a FTLF1217P2xTL module, which is used for Ethernet electrical signals to generate Ethernet optical information output by the optical module;

The small signal output unit includes a DAC7634 module to convert the digital signal into a 0-7V AC signal that can be recognized by the substation.

Further, the small signal output unit is provided with a protection interface.

Further, the connection between the optical output/input unit and the central processing unit adopts an LC interface.

Further, the central processing unit and the small signal output unit are connected through an SPI data bus.

Further, the GPS module is connected with BF518 through serial port communication.

Further, the IEEE1588 time synchronization module is connected to the BF518 through Ethernet, and the BF518 acquires time information.

The beneficial effects of the utility model are:

(1) The utility model can realize the test of the protection device, the measurement and control device and the intelligent terminal of the intelligent substation;

(2) The utility model can import the SCD model file of the whole station to automatically set the test plan for the protection device, measurement and control device, and intelligent terminal of the intelligent substation and simulate the actual situation and failure on site;

(3) The utility model can realize that the output conforms to the protocol of the smart substation or simulates the error of the message to check the communication consistency and reliability of the protection device, the measurement and control device, and the smart terminal;

(4) The utility model can output the analog signal that the substation can recognize through the small signal output unit.

Description of drawings

Fig. 1 is a connection block diagram of the utility model.

Fig. 2 is the connection diagram of each unit of the utility model.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

An automatic substation digital relay protection tester, including a central processing unit and a time synchronization unit, an optical output/input unit and a small signal output unit respectively connected to it;

Described central processing unit comprises two processing modules of ADSP+FPGA; ADSP comprises BF518 processor, as main control CPU, is used for communication with industrial computer and optical digital part input and output; FPGA comprises XC3S500E and is used for synchronizing and communicating with CPU, pair Time and small signal output; the central processing unit separates the control and communication processing and the real-time performance can reach 30ns;

The time synchronization unit includes a GPS module, an IRIG-B code time synchronization module and an IEEE1588 time synchronization module; the GPS module and the IEEE1588 time synchronization module are connected to the BF518 respectively; the GPS module, the IRIG-B code time synchronization module and the IEEE1588 time synchronization module are all Connect with FPGA; used to correct the absolute time of the test instrument to complete the synchronous time test, to ensure that the test is completed at the same absolute time;

The optical output/input unit includes a FTLF1217P2xTL module, which is used for Ethernet electrical signals to generate Ethernet optical information output by the optical module; it provides 9-1, 9-2, 9-1 extensions and GOOSE information for the IEC61850 standard specification, Completely analyze the protection model file, realize the configuration of current and voltage channel selection, proportional coefficient, ASDU number, sampling rate, and GOOSE information, and can interface with different types of protection flexibly and conveniently;

The small signal output unit includes a DAC7634 module to convert the digital signal into a 0-7V AC signal that can be recognized by the substation.

Further, the small signal output unit is provided with a protection interface.

Further, the connection between the optical output/input unit and the central processing unit adopts an LC interface; the area of the interface can be reduced to 1/3 of the area of the common interface.

Further, the central processing unit and the small signal output unit are connected through an SPI data bus.

Further, the GPS module is connected with BF518 through serial port communication.

Further, the IEEE1588 time synchronization module is connected to the BF518 through Ethernet, and the BF518 acquires time information.

When in use, the time module corrects the absolute time of the test instrument to complete the synchronized time test, and the central processing unit analyzes and processes the time information; the optical output/input unit is used for the Ethernet electrical signal to generate the Ethernet optical information output by the optical module, The central processing unit processes and judges; the judged result is sent to the substation through the small signal output unit.

The utility model can test the protection device, the measurement and control device and the intelligent terminal of the intelligent substation, and can import the SCD model file of the whole station to automatically set the test plan for the protection device, the measurement and control device and the intelligent terminal of the intelligent substation and simulate the actual situation on site and Fault, the output conforms to the protocol of the smart substation or simulates the error of the message to check the consistency and reliability of the communication of the protection device, the measurement and control device, and the smart terminal.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. An automatic substation digital relay protection tester is characterized in that: comprise a central processing unit and a timing unit, an optical output/input unit and a small signal output unit connected to it respectively; Described central processing unit comprises two processing modules of ADSP+FPGA; ADSP comprises BF518 processor, as main control CPU, is used for communication with industrial computer and optical digital part input and output; FPGA comprises XC3S500E and is used for synchronizing and communicating with CPU, pair time and small signal output; The time synchronization unit includes a GPS module, an IRIG-B code time synchronization module and an IEEE1588 time synchronization module; the GPS module and the IEEE1588 time synchronization module are connected to the BF518 respectively; the GPS module, the IRIG-B code time synchronization module and the IEEE1588 time synchronization module are all Connect with FPGA; The optical output/input unit includes a FTLF1217P2xTL module, which is used for Ethernet electrical signals to generate Ethernet optical information output by the optical module; The small signal output unit includes a DAC7634 module to convert the digital signal into a 0-7V AC signal that can be recognized by the substation. 2. A tester for automatic substation digital relay protection according to claim 1, characterized in that: said small signal output unit is provided with a protection interface. 3. A digital relay protection tester for automatic substation according to claim 1, characterized in that: the connection between the optical output/input unit and the central processing unit adopts an LC interface. 4. A digital relay protection tester for automatic substation according to claim 1, characterized in that: the central processing unit and the small signal output unit are connected through an SPI data bus. 5. A tester for automatic substation digital relay protection according to claim 1, characterized in that: said GPS module is connected to BF518 through serial port communication. 6. A digital relay protection tester for automatic substation according to claim 1, characterized in that: said IEEE1588 time synchronization module is connected to BF518 through Ethernet, and BF518 acquires time information.