Automatic calibration instrument for nuclear-grade medium-voltage protection device

Abstract

The invention belongs to the technical field of protection device verification, and particularly relates to an automatic verification instrument for a nuclear-grade medium-voltage protection device, and the instrument comprises a power supply which is used for supplying power to the whole automatic verification instrument; the main control board is used for generating a current output control instruction, sending the current output control instruction to the current output module and performing logic control on the current output module; the data processing module is used for receiving the actuation time of the starting signal and the tripping signal measured by the switching value signal module, performing data processing to obtain a protected actuation value, a return value and a measured value of the actuation time, and generating a verification result; the current output module is used for receiving the current output control instruction and outputting three-phase adjustable current; the to-be-verified protection device is used for receiving the three-phase adjustable current and generating a starting signal and a tripping signal; and the switching value signal module is used for receiving the starting signal and the tripping signal, and measuring and recording the action time of the starting signal and the tripping signal. According to the invention, the verification time can be greatly shortened, and the field working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of protection device calibration, and in particular relates to an automatic calibration instrument for a nuclear-grade medium-voltage protection device. Background Art

[0002] A large number of 6kV transformer and motor cabinets in a plant expansion project are equipped with SPJ 142 C or SPAM 150 C nuclear-grade medium-voltage protection devices. Consequently, the protection and meter calibration work for these medium-voltage cabinets is time-consuming, with the SPJ 142C and SPAM 150 C nuclear-grade medium-voltage protection devices accounting for the largest portion of the time.

[0003] The two nuclear-grade medium-voltage protection devices were calibrated using a traditional relay tester. After connecting the relay tester to the nuclear-grade medium-voltage protection device, the tester was manually operated to apply the corresponding current signal to the nuclear-grade medium-voltage protection device. Manual adjustments were then made to simulate specific conditions, and the device was observed to ensure that it operated as expected. After calibrating each protection device, wiring changes and manual adjustments to the relay tester's output signal were required, making this inefficient. This was particularly challenging during overhauls, when the downtime of downstream 6kV equipment was limited.

[0004] Therefore, it is very urgent to develop an automatic calibrator suitable for nuclear-grade medium-voltage protection devices based on the corresponding on-site calibration work. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic calibration instrument for nuclear-grade medium-voltage protection devices, which can replace the traditional manual test mode, realize automatic calibration of the protection device, automatically judge the qualification of the protection device, and generate a calibration report; it can greatly shorten the calibration time and improve on-site work efficiency.

[0006] The technical solution for achieving the purpose of the present invention is as follows: An automatic calibration instrument for a nuclear-grade medium-voltage protection device, the calibration instrument comprising: Power supply, used to power the entire automatic calibration instrument; The main control board is used to generate current output control instructions, send the current output control instructions to the current output module, and perform logical control on the current output module; receive the action time of the start signal and trip signal measured by the switch signal module, perform data processing, obtain the measured values ​​of the protection action value, return value and action time, and generate the verification result; Current output module, used to receive current output control instructions and output three-phase adjustable current; The protection device to be verified is used to receive the three-phase adjustable current and generate the starting signal and the tripping signal; The switch signal module is used to receive the start signal and trip signal, and measure and record the action time of the start signal and trip signal.

[0007] Furthermore, the calibration instrument further comprises: A data storage module is used to receive and store setting parameters, including the output current data for protection device verification, switch interface setting data, and the setting values ​​of the protection action value, return value, and action time; The main control board receives the set output current data for protection device verification and the switch interface setting data, and generates a current output control instruction; receives the set values ​​of the protection action value, return value and action time, compares the measured values ​​of the protection action value, return value and action time with the set values ​​of the protection action value, return value and action time, and generates a verification result.

[0008] Furthermore, the data storage module includes setting parameters of different protection devices, and the setting parameters of each protection device are stored separately; in the same protection device, the switch interface setting data and the output current data for verification, the setting values ​​of the action value, return value and action time correspond to each other.

[0009] Furthermore, the calibration instrument further comprises: The data display module is used to receive and display the set output current data for protection device verification, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, and verification results.

[0010] Furthermore, the calibration instrument further includes: an external input device for inputting data.

[0011] Furthermore, the three-phase adjustable current output by the current output module can be set to a continuous output amplitude of the three-phase current, or an upper limit, a lower limit, a step size, and a step size change time of the three-phase current.

[0012] Furthermore, when the three-phase adjustable current output by the current output module is set to the continuous output amplitude of the three-phase current, the timing is started when the current output is started, and the output is stopped when a certain signal is received. The duration of the current output is the action time, and the action time verification is completed.

[0013] Furthermore, when the three-phase adjustable current output by the current output module is set to the upper limit, lower limit, step size, and step size change time of the three-phase current change, it starts to change from the lower limit and stops changing when a certain signal is received. The current value is the action value; it starts to change from the upper limit and stops changing when a certain signal is received. The current value is the return value; the verification of the action value and the return value is completed.

[0014] Furthermore, the calibration instrument comprises: a secondary development platform layer, an automatic test layer, and a test instrument interface layer; Secondary development platform layer: includes a test case editing platform and a protocol template editing platform; the test case editing platform is used to generate test case templates and send them to the automatic test program of the automatic test layer; the protocol template editing platform is used to generate protocol engine templates and send them to the protocol engine program of the automatic test layer; Automatic test layer: includes automatic test program and protocol engine program. The automatic test layer program is used to complete automatic testing according to the test case template; the protocol engine program is used to communicate with the protection device under test according to the protocol engine template; Test instrument interface layer: includes the driver library, which is used to control the driver of the calibration instrument.

[0015] Furthermore, the main control board is located in the automatic test layer, and performs logic control and data processing of the automatic calibration instrument through the automatic test program, generates calibration results, and communicates with the protection device under test through the protocol engine program; The current output module, switch signal module, data storage module, and data storage module are located in the test instrument interface layer. The driver in the driver library drives the current output module to output three-phase adjustable current, and drives the switch signal module to measure and record the action time of the start signal and trip signal. Drive the data storage module to receive and store the output current data for protection device verification, switch interface setting data, protection action value, return value and action time setting values; and verification results generated by the main control board; The drive data display module executes the set protection device verification output current data, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, and verification results display.

[0016] The beneficial technical effects of the present invention are: 1. This invention provides an automatic calibration instrument for nuclear-grade medium-voltage protection devices. It configures test files for all protection types before calibration. Upon commencement of field work, users simply open the configured test files, complete wiring for the protection device to be calibrated, and, after startup, automatically increase the voltage on the protection device without rewiring, completing calibration for all protection types in one go. Upon completion, a calibration report is generated, and unqualified protection devices can be marked with annotation entries.

[0017] 2. The present invention provides an automatic calibration instrument for nuclear-grade medium-voltage protection devices, which can realize fully automatic calibration of nuclear-grade medium-voltage protection devices, such as the medium-voltage protection devices SPAJ142C and SPAM150C in power plants, replacing the traditional manual test mode. It can greatly shorten the calibration time and avoid mistakes made in a hurry. It can complete multiple calibration tasks more efficiently within the shorter overhaul period, thereby improving on-site work efficiency.

[0018] 3. The present invention provides an automatic calibration instrument for a nuclear-grade medium-voltage protection device, which can automatically generate a calibration report with the on-site calibration work instructions as the calibration procedure, and automatically judge the eligibility of the calibration data.

[0019] 4. The present invention provides an automatic calibration instrument for a nuclear-grade medium-voltage protection device, which can realize the export of calibration data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a module of an automatic calibration instrument for a nuclear-grade medium-voltage protection device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the interface of a data display module in an automatic calibration instrument for a nuclear-grade medium-voltage protection device provided by an embodiment of the present invention; Figure 3 A schematic diagram of the architecture of an automatic calibration instrument for a nuclear-grade medium-voltage protection device provided in an embodiment of the present invention.

[0021] In the figure: 1-power supply; 2-main control board; 3-switch signal module; 4-current output module; 5-protection device to be verified; 6-data storage module. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, the present invention provides an automatic calibration instrument for a nuclear-grade medium-voltage protection device, comprising: a power supply 1, a main control board 2, a switch signal module 3, and a current output module 4.

[0024] Power supply 1, used to power the entire automatic calibration instrument; The main control board 2 is used to generate a current output control instruction, send the current output control instruction to the current output module 4, and perform logic control on the current output module 4; receive the action time of the start signal and trip signal measured by the switch signal module 3, perform data processing, obtain the measured values ​​of the protection action value, return value and action time, and generate a verification result; The current output module 4 is used to receive the current output control instruction and output the three-phase adjustable current; The protection device to be checked 5 is used to receive the three-phase adjustable current and generate a start signal and a trip signal; The switch signal module 3 is used to receive the start signal and the trip signal, and measure and record the action time of the start signal and the trip signal.

[0025] The power supply 1 is connected to the main control board 2 and is used to power the entire automatic calibration instrument; the input voltage provided to the main control board 2 is: two-phase AC200-240V 50 / 60HZ.

[0026] The main control board 2, the current output module 4, the protection device to be verified 5, and the switch signal module 3 are connected in sequence.

[0027] The main control board 2 generates a current output control instruction, sends the current output control instruction to the current output module 4, performs logical control on the current output module 4, and controls the current output module 4 to output current signals with different requirements; the current output module 4 receives the current output control instruction, simulates the working condition of the protection device to be verified according to the current output control instruction, outputs a three-phase adjustable current, and inputs the three-phase adjustable current to the protection device to be verified 5; the protection device to be verified 5 generates a start signal and a trip signal after receiving the three-phase adjustable current, and sends the start signal and the trip signal to the switch signal module 3; the switch signal module 3 receives the start signal and the trip signal, measures and records the action time of the start signal and the trip signal, and sends the action time of the start signal and the trip signal to the main control board 2; the main control board 2 performs data processing according to the action time of the start signal and the trip signal, and obtains the measured values ​​of the protection action value, return value and action time.

[0028] In a specific embodiment, the current output module 4 is constructed by a thyristor, an operational amplifier, etc., and outputs three-phase adjustable current. The size of each phase can be set independently, that is, it can output phase unbalanced current.

[0029] In a specific embodiment, the three-phase adjustable current output by the current output module 4 can be set to a continuous output amplitude of the three-phase current, or an upper limit, lower limit, step size, and step size change time of the three-phase current.

[0030] When the three-phase adjustable current output by the current output module 4 is set to the continuous output amplitude of the three-phase current, the timing starts when the current is output, and the output is stopped when a certain signal is received. The duration of the current output is the action time, which can complete the action time verification.

[0031] When the three-phase adjustable current output by the current output module 4 is set to the upper limit, lower limit, step size, and step size change time of the three-phase current change, it starts to change from the lower limit (upper limit) and stops changing when a certain signal is received. The current value is the action value (return value), which can complete the verification of the action value and return value.

[0032] The calibration instrument of the present invention also includes a data storage module 6 for receiving and storing setting parameters, which include the set output current data for protection device calibration, switch interface setting data, and the set values ​​of protection action value, return value and action time.

[0033] The data storage module 6 is connected to the main control board 2. The data storage module 6 receives and stores setting parameters, including the output current data used for protection device verification, the switch interface setting data, and the set values ​​for the protection action value, return value, and action time. These setting parameters vary for different protection devices. Within the same protection device, the switch interface setting data corresponds to the output current data used for verification, and the set values ​​for the action value, return value, and action time.

[0034] The data storage module 6 includes setting parameters of different protection devices. The setting parameters of each protection device are stored separately to ensure that the setting parameters of the same protection device are the same during each verification and can be directly applied without restoring.

[0035] The data storage module 6 transmits the set output current data for protection device verification, the switch interface setting data, and the set values ​​for the protection action value, return value, and action time to the main control board 2. The main control board 2 generates a current output control instruction based on the set output current data for protection device verification and the switch interface setting data. The main control board 2 compares the measured values ​​of the protection action value, return value, and action time with the set values ​​of the protection action value, return value, and action time, generates a verification result, and transmits the verification result to the data storage module 6 for storage. If the difference between the measured values ​​of the protection action value, return value, and action time and the set values ​​does not exceed the allowable error, the protection device is determined to be qualified; otherwise, the protection device is determined to be unqualified.

[0036] In one specific embodiment, the main control board 2 generates a current output control instruction via a single-chip microcomputer and sends it to the current output module 4 for logic control, controlling the current output module 4 to output current signals of varying requirements. An on-chip logic program processes the measured action times of the start signal and trip signal to obtain the measured action value, return value, and action time of the protection. These measured action value, return value, and action time are then compared with the set values ​​for the action value, return value, and action time of the protection, and data processing is performed to generate a verification result. The main control board 2 includes protection circuitry, such as overcurrent protection.

[0037] The calibration instrument of the present invention also includes a data display module for receiving and displaying the set output current data for protection device calibration, switch interface setting data, set values ​​of protection action value, return value and action time, measured values ​​of protection action value, return value and action time, and calibration results.

[0038] The data display module is connected to the main control board 2. The main control board 2 sends the set output current data for protection device verification, the switch interface setting data, the protection action value, return value and action time setting values, the protection action value, return value and action time measurement values, and the verification results to the data display module. The data display module displays the set output current data for protection device verification, the switch interface setting data, the protection action value, return value and action time setting values, the protection action value, return value and action time measurement values, and the verification results. The display interface of the data display module is as follows: Figure 2 shown.

[0039] In a specific embodiment, the main control board 2 can mark the unqualified protection devices according to the verification results to generate marking entries, and automatically generate a verification report, and send the marking entries and verification report to the data storage module 6 for storage; and send the marking entries and verification report to the data display module for display.

[0040] In a specific embodiment, the data display module has a data export function, through which the output current data for protection device verification, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, verification results, and verification report are exported.

[0041] The data display module is a display screen, which can be a touch screen or a non-touch screen. Although using a touch screen can reduce the number of peripheral devices, it will involve many data inputs during use, and inputting only through the touch screen will affect the speed of data input.

[0042] The calibration instrument of the present invention also includes an external input device connected to the main control board 2 for inputting data. The external input device includes a mouse and a keyboard. The mouse and keyboard are connected to the main control board 2. The display screen, mouse, and keyboard work together to increase the speed of data entry, making it more accurate, convenient, and quick.

[0043] In a specific embodiment, the current output module 4 is provided with a current output terminal, and the switch signal module 3 is provided with a signal input terminal.

[0044] Before verification, select the switch interface setting data according to the protection device to be verified 5, configure the corresponding output current data for verification, the set values ​​of the action value, return value and action time, and complete the test file configuration work; connect the protection device to be verified 5 to the current output end of the current output module 4 and the signal input end of the switch signal module 3 respectively; then automatically verify the protection device to be verified 5 through the verification instrument of the present invention; after the verification is completed, generate the verification results, mark the unqualified protection devices, generate the marking items and the verification report, and display them through the data display module.

[0045] In a specific embodiment, the protection device 5 to be verified includes SPAJ142C and SPAM150C protection devices.

[0046] In a specific embodiment, the calibration instrument of the present invention is divided into a three-layer architecture, including a secondary development platform layer, an automatic test layer, and a test instrument interface layer. Figure 3 shown.

[0047] Secondary development platform layer: This includes the test case editing platform and the protocol template editing platform. The test case editing platform is used to generate test case templates and send them to the automatic test program in the automatic test layer. The protocol template editing platform is used to generate protocol engine templates and send them to the protocol engine program in the automatic test layer.

[0048] Automatic test layer: includes automatic test program and protocol engine program. The automatic test layer program is used to complete automatic testing according to the test case template; the protocol engine program is used to communicate with the protection device to be tested according to the protocol engine template.

[0049] Test instrument interface layer: includes the driver library, which is used to control the driver of the calibration instrument.

[0050] The test instrument interface layer is independent of the automatic test layer and the secondary development platform layer. During on-site testing, the corresponding test instrument interface program is set and selected to implement the same test case file and use the tester for automatic testing.

[0051] The main control board 2 is located in the automatic test layer, and performs the logic control and data processing of the automatic calibration instrument through the automatic test program, generates the calibration results, and communicates with the protection device under test through the protocol engine program; The current output module 4, the switch signal module 3, the data storage module 6, and the data storage module are located in the test instrument interface layer. The driver in the driver library drives the current output module 4 to output three-phase adjustable current and drives the switch signal module 3 to measure and record the action time of the start signal and the trip signal; The drive data storage module 6 receives and stores the output current data for setting the protection device verification, the switch interface setting data, the protection action value, the return value and the action time setting value; and the verification result generated by the main control board 2; The drive data display module executes the set protection device verification output current data, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, and verification results display.

[0052] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Any content not described in detail in the present invention may be adapted from existing technologies.

Claims

1. A nuclear-grade medium-voltage protection device automatic calibration instrument, characterized in that: The calibration instrument comprises: Power supply, used to power the entire automatic calibration instrument; The main control board is used to generate current output control instructions, send the current output control instructions to the current output module, and perform logical control on the current output module; receive the action time of the start signal and trip signal measured by the switch signal module, perform data processing, obtain the measured values ​​of the protection action value, return value and action time, and generate the verification result; Current output module, used to receive current output control instructions and output three-phase adjustable current; The protection device to be verified is used to receive the three-phase adjustable current and generate the starting signal and the tripping signal; The switch signal module is used to receive the start signal and trip signal, and measure and record the action time of the start signal and trip signal.

2. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 1, characterized in that: The calibration instrument further comprises: A data storage module is used to receive and store setting parameters, including the output current data for protection device verification, switch interface setting data, and the setting values ​​of the protection action value, return value, and action time; The main control board receives the set output current data for protection device verification and the switch interface setting data, and generates a current output control instruction; receives the set values ​​of the protection action value, return value and action time, compares the measured values ​​of the protection action value, return value and action time with the set values ​​of the protection action value, return value and action time, and generates a verification result.

3. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 2, characterized in that: The data storage module includes setting parameters of different protection devices, and the setting parameters of each protection device are stored separately; in the same protection device, the switch interface setting data and the output current data for verification, the setting values ​​of the action value, return value and action time correspond to each other.

4. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 2, characterized in that: The calibration instrument further comprises: The data display module is used to receive and display the set output current data for protection device verification, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, and verification results.

5. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 4, characterized in that: The calibration instrument further comprises: an external input device for inputting data.

6. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 1, characterized in that: The three-phase adjustable current output by the current output module can be set to a continuous output amplitude of the three-phase current, or an upper limit, a lower limit, a step size, and a step size change time of the three-phase current.

7. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 6, characterized in that: When the three-phase adjustable current output by the current output module is set to the three-phase current continuous output amplitude, the timing starts when the current output is started, and the output is stopped when a certain signal is received. The duration of the current output is the action time, and the action time verification is completed.

8. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 6, characterized in that: When the three-phase adjustable current output by the current output module is set to the upper limit, lower limit, step size, and step size change time of the three-phase current change, it starts to change from the lower limit and stops changing when a certain signal is received. The current value is the action value; it starts to change from the upper limit and stops changing when a certain signal is received. The current value is the return value. The verification of the action value and return value is completed.

9. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 4, characterized in that: The calibration instrument includes: a secondary development platform layer, an automatic test layer, and a test instrument interface layer; Secondary development platform layer: includes a test case editing platform and a protocol template editing platform; the test case editing platform is used to generate test case templates and send them to the automatic test program of the automatic test layer; the protocol template editing platform is used to generate protocol engine templates and send them to the protocol engine program of the automatic test layer; Automatic test layer: includes automatic test program and protocol engine program. The automatic test layer program is used to complete automatic testing according to the test case template; the protocol engine program is used to communicate with the protection device under test according to the protocol engine template; Test instrument interface layer: includes the driver library, which is used to control the driver of the calibration instrument.

10. The automatic calibration instrument for nuclear-grade medium-voltage protection devices according to claim 9, characterized in that: The main control board is located in the automatic test layer. It performs the logic control and data processing of the automatic calibration instrument through the automatic test program, generates the calibration results, and communicates with the protection device under test through the protocol engine program. The current output module, switch signal module, data storage module, and data storage module are located in the test instrument interface layer. The driver in the driver library drives the current output module to output three-phase adjustable current, and drives the switch signal module to measure and record the action time of the start signal and trip signal. Drive the data storage module to receive and store the output current data for protection device verification, switch interface setting data, protection action value, return value and action time setting values; and verification results generated by the main control board; The drive data display module executes the set protection device verification output current data, switch interface setting data, protection action value, return value and action time setting values, protection action value, return value and action time measured values, and verification results display.

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