CN111812576A - System and method for adjusting transformer board of relay protection device - Google Patents
System and method for adjusting transformer board of relay protection device Download PDFInfo
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- CN111812576A CN111812576A CN202010708370.6A CN202010708370A CN111812576A CN 111812576 A CN111812576 A CN 111812576A CN 202010708370 A CN202010708370 A CN 202010708370A CN 111812576 A CN111812576 A CN 111812576A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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Abstract
The invention discloses a system and a method for adjusting a transformer plate of a relay protection device, and relates to the technical field of electric power. The adjusting system comprises a calibration source, a calibration device and an upper computer, wherein the two phases of the calibration source, the calibration device and the upper computer are connected with each other; the calibration source provides voltage and current analog quantity for the calibration process; the calibration device is used for calibrating the mutual inductor plate, reading and writing the calibration coefficient and the identification code and interacting with an upper computer; the upper computer is provided with upper computer software, and the upper computer software is used for storing the board card information and the calibration coefficient of the mutual inductor board and providing statistical analysis of the defective rate and the consistency of the mutual inductor in batches. The system and the method for adjusting the transformer plates of the relay protection device can be compatible with different types of transformer plates, realize the function of calibrating the transformer plates in batches, improve the calibration efficiency and the calibration universality and provide powerful data support for the use of the transformer plates in batches.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric power, in particular to a system and a method for adjusting a transformer board of a relay protection device.
Background
The relay protection device is used as an important component of a secondary system of a transformer substation, can quickly identify faults and abnormal working states of electrical equipment according to parameters such as current, voltage, power factor angle and the like, quickly sends an alarm and timely cuts off fault points, thereby improving the reliability of system operation and ensuring that safe and continuous electric energy is provided for users to the maximum extent. The premise that the relay protection device can accurately make a judgment is the accuracy of external input quantity, particularly the electrical parameters mainly including voltage and current. Regardless of conventional sampling or conventional device in the intelligent device, the acquisition of voltage and current is realized in a sampling mode, the acquisition method is mostly to integrate the voltage and current transformers onto a board card to realize the acquisition of analog quantity, and then the acquired analog signals are converted into digital signals to realize the protection function, so that the accuracy of the sampling of the voltage and current transformer boards directly influences the accuracy and the rapidity of the protection function of the relay protection device, and the effective improvement of the sampling accuracy of the transformer boards has important significance for ensuring the normal work of the relay protection device.
Most of the current transformer boards adopted by the relay protection device are calibrated on the protection device, and the calibration coefficients are stored through a CPU or other board cards; some protection devices adopt a calibration-free mode, and directly solidify the adjustment coefficient into a program to realize the adjustment, and the calibration processing mode brings great limitation to the exchange and replacement of the mutual inductor plates; in addition, the current functional test means of the mutual inductor only can detect whether the mutual inductor has good functions by using the operation of a protection program after being loaded on a protection device, the test environment needs the matching of the matched protection functions, and the test efficiency is lower; in addition, the defective rate of each batch of transformers is mainly controlled by a transformer manufacturer, and the transformers in each batch are usually controlled by adopting a sampling inspection mode due to large quantity, so that great hidden danger exists for a protection device; meanwhile, the mutual inductor individuals of each batch have difference, and the consistency detection is also of great significance.
Based on the defects in the prior art, the invention provides a system and a method for adjusting the mutual inductor plates of the relay protection device, which improve the calibration efficiency of the mutual inductor plates, increase the convenience of the calibration work of the mutual inductor plates and provide powerful data support for the use of the mutual inductors in each batch.
Disclosure of Invention
The embodiment of the invention provides a system and a method for adjusting a transformer board of a relay protection device, and solves the problems that the conventional transformer board is low in calibration efficiency, inconvenient in calibration mode, troublesome in replacement of the transformer board, deficient in manual evaluation of the transformer board and the like.
In order to solve the technical problems, the invention discloses the following technical scheme:
the invention provides a mutual inductor plate adjusting system of a relay protection device, which comprises a calibration source, a calibration device and an upper computer, wherein the two phases of the calibration source, the calibration device and the upper computer are connected with each other;
the calibration source provides voltage and current analog quantity for the calibration process;
the calibration device is used for calibrating the mutual inductor plate, reading and writing the calibration coefficient and the identification code and interacting with an upper computer;
the upper computer is provided with upper computer software, and the upper computer software is used for storing the board card information and the calibration coefficient of the mutual inductor board and providing statistical analysis of the defective rate and the consistency of the mutual inductor in batches.
Based on the scheme, the system is optimized as follows:
the calibration device comprises a calibration management board which is connected with the mutual inductor board, is a control core of the calibration device and comprises a CPU module, an analog-to-digital conversion module and a communication module. The CPU module is used for calibration logic, network communication and interaction with other board cards of the mutual inductor board; the analog-to-digital conversion module converts the analog signal into a digital signal; the communication module is used for communicating with an upper computer and the transformer board.
Furthermore, the calibration device also comprises a case, a back mother board, a liquid crystal board, a front panel and a bar code scanning gun, wherein the calibration management board is connected with the liquid crystal board and the bar code scanning gun. The chassis adopts guide rail mounting holes with standard width, and the back opening is provided with a slot; the back mother board is used for transmitting data information between the mutual inductor board and the calibration management board, and the mutual inductor boards of different types and European-plug types correspond to different back mother boards and can be replaced in a plug-in mode according to calibration requirements; the liquid crystal panel is used for information interaction in the calibration process and mainly bears liquid crystal area display control, alarm indicator lamp control and key state detection; the front panel is used for dividing keys, indicator lights and liquid crystal display areas; the bar code scanning gun is used for scanning bar code numbers of the mutual inductor plate, acquiring hardware coding information of the mutual inductor plate and transmitting the information to the calibration management plate. Specifically, the bar code scanning gun is connected with a serial port on the calibration management board through a serial port line, and the calibration management board is connected with the mutual inductor board and the liquid crystal board through a bus on a back mother board and is connected with an upper computer through a network port.
Further, the upper computer is connected with the calibration source through a network port and controls the output of the calibration source through a command; the upper computer is further connected with the calibration management board through a network port, management functions such as software coding, board card information storage and calibration parameter storage of the mutual inductor board are achieved, induction and statistics are conducted according to information in the plate code number of the mutual inductor board, unqualified mutual inductor boards in the calibration process are prompted, the defective rate in batches is calculated, and the mutual inductor boards in the same batch are subjected to normalization curve drawing by using the stored calibration coefficients and channel attributes to evaluate the consistency of the mutual inductor boards.
The invention provides a method for adjusting a transformer board of a relay protection device, which utilizes the system for adjusting the transformer board of the relay protection device to adjust the calibrated transformer board, and the method comprises the following steps:
respectively connecting and communicating the calibration source and the calibration management board with an upper computer;
selecting a corresponding back motherboard according to the specification and the type of a mutual inductor board to be calibrated and the European-plug type, replacing the back motherboard in a plug-in mode, and inserting the mutual inductor board into a slot position corresponding to the back motherboard;
starting a calibration source to output calibration voltage and calibration current, and performing calibration operation through a liquid crystal panel or an upper computer;
and checking the defective rate and the consistency of the mutual inductor plates in the batch or the total defective rate and the consistency in the batch through the statistical function of the upper computer software, and evaluating the mutual inductor plates in the batch.
Further, before the transformer board is inserted into the slot corresponding to the back motherboard, the following steps are also included: judging whether the mutual inductor board to be calibrated is a bare board, scanning the bar code number of the mutual inductor board by using a bar code scanning gun under the condition of the bare board so that a calibration management board can obtain the bar code number of the mutual inductor board to be inserted, then inserting the mutual inductor board into a case, mapping the calibration management board according to the bar code number and the insertion position at the moment, obtaining a unique software code through upper computer software, forming an identification code by the unique software code and the hardware code and storing the identification code into a storage medium of the mutual inductor board, and sequentially inserting the mutual inductor boards one by one after the calibration management board controls an indicator lamp of a corresponding slot position to be turned on.
Further, for the transformer board calibrated for the first time, the method further comprises the following steps before calibration: and the bar code scanning gun sends the bar code number information to the calibration management board, and the calibration management board inquires the mutual inductor board on each slot position in a polling mode and respectively reads the hardware code and the software code on the storage medium of the mutual inductor board. The two codes read from the storage medium are invalid codes for the first time of calibration, at the moment, the calibration management board writes the bar code number into the hardware code storage address of the mutual inductor board to form a hardware unique code, the hardware unique code is solidified into the storage medium, meanwhile, the calibration management board uploads the hardware unique code to the upper computer, the software unique code is distributed by upper computer software, then, the calibration management board writes the software unique code into the software code storage address of the mutual inductor board, the binding of the bar code number, the hardware unique code and the software unique code is realized, and the identification code of the unique identifier is provided for the mutual inductor board. And the upper computer software establishes a unique digital file for the mutual inductor board, and the indexing is realized through software hardware coding.
Further, the starting of the calibration source to output the calibration voltage or the calibration current and the calibration operation by the liquid crystal panel or the upper computer specifically include the following steps:
opening the channel type of an operation interface setting board card of the liquid crystal panel or the upper computer, starting a calibration source to output calibration voltage or calibration current, and then starting calibration through a calibration starting button of the liquid crystal panel or the upper computer interface;
the calibration management board reads the hardware unique code and the software unique code of the mutual inductor board to be calibrated, then reads the channel type and the calibration coefficient of the mutual inductor board, then converts the read numerical value through the calibration coefficient to obtain a sampling value, and compares the sampling value with the output value of the calibration source;
if the difference value between the two is not more than a first threshold value, judging that the calibration coefficient is available and the mutual inductor board of the channel is qualified, uploading the calibration coefficient to an upper computer, recording the calibration coefficient into a digital file of the mutual inductor board by upper computer software, classifying the mutual inductors according to the bar code numbers, and counting the calibration coefficient and the calibration result of each mutual inductor into the consistency evaluation function of each batch;
if the difference value of the two is larger than the first threshold and does not exceed the second threshold, recalibrating, uploading the calibration value to an upper computer, comparing whether the corresponding calibration coefficient of the board card exists or not by upper computer software, comparing the corresponding calibration coefficient with the historical calibration coefficient, and judging whether the board card is unstable or not according to the comparison result;
and if the difference value of the two is greater than a second threshold value, determining that the channel transformer board is unqualified, recording the condition of the channel transformer board into a batch defective rate evaluation function, and respectively calculating the defective rate of the calibrated board cards and the total defective rate of the batch.
In the process of performing calibration operation through the liquid crystal panel or the upper computer, when the calibration management board reads the calibration coefficient of the mutual inductor panel to be calibrated, if the calibration coefficient does not exist, the calibration management board reads the digital quantity information converted by the analog-to-digital conversion module through the CPU module to calculate a corresponding effective value, obtains the calibration coefficient by comparing the effective value with the calibration value of the additional calibration source, and writes the calibration coefficient, the channel type and the corresponding relationship into the storage medium of the mutual inductor panel.
According to the method for adjusting the mutual inductor board of the relay protection device, the damaged and replaced mutual inductor board of the ferroelectric memory can be directly scanned with the bar code number on the mutual inductor board, the calibration coefficient of the board card is searched from the database through the one-key copying function, and the calibration coefficient is directly written into the ferroelectric storage medium through the calibration management board without repeated calibration, so that the method is fast and convenient.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
1. the embodiment of the application provides a pair of relay protection device mutual-inductor board timing system, the mutual-inductor board of different grade type corresponds different back mother boards and back mother board and can carry out the plug according to the calibration needs and change to compatible different grade type's mutual-inductor board realizes the function of calibrating mutual-inductor board in batches, calibrating device sets up the trench of multiple grade according to factors such as conventional integrated circuit board thickness, integrated circuit board width, the calibration of mutual-inductor board on the compatible different grade type device has improved the calibration efficiency and the extensive nature of calibration.
2. The embodiment of the application provides a pair of relay protection device mutual-inductor board timing system, calibrating device easy operation both can realize one-touch manual calibration through local liquid crystal board, also can carry out long-range calibration through host computer software, has increased the convenience of mutual-inductor board calibration work.
3. The utility model provides a relay protection device mutual-inductor board timing system adopts distal end and local two sets of linkage timing mechanism. And the remote end stores the board card information and the calibration coefficient of the mutual inductor boards through the upper computer, and performs statistical analysis and reminding on the defective rate and consistency of the mutual inductor boards in the same batch. The small-capacity ferroelectric memory integrated on the mutual inductor board is used for storing board card identification, channel information and calibration parameters, and the calibration device is used as a pivot to realize a remote-end and local linkage calibration mechanism, so that the calibration and detection functions of the mutual inductor board are realized. The method and the device realize 'one-board one-parameter, the number of the parameters is moved along with the card' under the condition that the external acquisition circuit environment is consistent, improve the convenience of replacing the mutual inductor board, better carry out accurate calibration aiming at each board card and realize real plug-and-play.
4. According to the transformer board adjusting system of the relay protection device, batches are distinguished through batch fields of the serial numbers of the transformer boards, the transformer boards which cannot be calibrated in the batch calibrating process are registered and alarmed, and the defective rate of the batches is counted according to the total number of calibrations in the batches and the number of calibrations which cannot be calibrated. Meanwhile, the upper computer software counts the consistent stability of the transformer plates according to the normalized curve of the calibration coefficient of each transformer plate in the same batch, evaluates the batch characteristics of the transformer plates, effectively helps a user to master the batch characteristics of the transformer plates, and provides a powerful data basis for the use of the transformer plates.
The method for adjusting the mutual inductor plate of the relay protection device, which is provided by the embodiment of the application, can adopt the mutual inductor plate adjusting system of the relay protection device to adjust the mutual inductor plate of the relay protection device, and has the technical effect of the mutual inductor plate adjusting system of the relay protection device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a calibration system for a transformer board of a relay protection device according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a back panel of the instrument transformer calibration device of FIG. 1;
FIG. 3 is a schematic front panel view of the instrument transformer calibration device of FIG. 1;
fig. 4 is a flowchart of a method for adjusting a transformer board of a relay protection device according to an embodiment of the present application;
reference numerals: 1-a calibration source, 2-a calibration device and 3-an upper computer.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram illustrating a calibration system of a transformer board of a relay protection device according to an embodiment of the present application; fig. 2 and 3 respectively show schematic diagrams of a back panel and a front panel of the transformer calibration device in fig. 1.
As shown in fig. 1 to fig. 3, a system for calibrating a transformer board of a relay protection device according to this embodiment includes a calibration source 1, a calibration device 2, and an upper computer 3. The calibration source 1 provides voltage and current analog quantity for the calibration process; the calibration device 2 is used for calibrating the mutual inductor plate, reading and writing the calibration coefficient and the identification code and interacting with an upper computer; the upper computer 3 is provided with upper computer software which is used for storing the board card information and the calibration coefficient of the mutual inductor board and providing statistical analysis of the defective rate and consistency of the mutual inductor in batches.
Specifically, the calibration source 1 provides analog quantity voltage and current input for the calibration process, and the calibration source can be manually controlled and also can be remotely controlled through an upper computer.
The calibration device 2 mainly comprises a case, a back mother board, a liquid crystal panel, a front panel, a bar code scanning gun and a calibration management board.
The chassis is compatible with the height requirements of the mutual inductor plates of 110kV and 220kV lines, buses and transformer protection devices, guide rail mounting holes with standard widths are adopted on the chassis, and slots are formed in openings in the back of the chassis.
The back mother board is used for transmitting data information between the mutual inductor board and the calibration management board, the mutual inductor boards of different types and European-plug types are welded on different back mother boards, the mutual inductor boards can be replaced in a plug-pull mode according to calibration requirements, compatibility of different mutual inductor boards is guaranteed, and the back mother board is arranged on the back of the front panel.
The liquid crystal panel is mainly used for information interaction function in the calibration process, and bears the detection of liquid crystal area display control, alarm indicator control and key state. The liquid crystal panel is arranged between the back mother board and the front panel, one end of the liquid crystal panel is plugged on the back mother board in a wire arrangement mode, and the other end of the liquid crystal panel displays in a liquid crystal area of the front panel.
The front panel is used for dividing keys, indicator light positions and a liquid crystal display area, and is fixed on the front side of the case through screw holes at four corners.
The bar code scanning gun is used for scanning bar code numbers on the mutual inductor board, acquiring board card hardware codes and transmitting the board card hardware codes to the calibration management board, the bar code scanning gun is connected with a serial port on the calibration management board through a serial port line, the bar codes adopt a sectional type recording format, and the basic format is 'manufacturer identification + type + batch + date'.
The calibration management board is a control core of the calibration device, and realizes calibration logic of the mutual inductor board, communication with a storage chip of the mutual inductor board, interaction with upper computer software and display control of the liquid crystal board. The calibration management board is connected with the mutual inductor board and the liquid crystal board through a bus on the back mother board and is connected with an upper computer through a network port. In this embodiment, the calibration management board mainly includes a CPU module with a ZYNQ chip as a core, an AD module for analog-to-digital conversion, and a communication module. The CPU module adopts an ARM + FPGA mode, the ARM side is responsible for calibrating logic, network communication and interaction with other board cards, the FPGA is mainly responsible for acquisition and conversion of AD module data, and the AD module is controlled to read data of the mutual inductor board, perform corresponding conversion and transmit the data to the ARM side to perform calibration logic. The communication module is mainly responsible for the communication with liquid crystal board, host computer and mutual-inductor board.
The upper computer 3 is respectively connected with the calibration source and the calibration management board through the Ethernet port to realize interaction with the calibration source and the calibration device. The upper computer software can control the output of the calibration source through commands. The upper computer software can also realize management functions of software coding, board card information storage, calibration parameter storage and the like of the mutual inductor board, and meanwhile, the upper computer software can perform induction and statistics on the mutual inductor board according to batch fields in the bar code number, prompt the mutual inductor board which cannot be calibrated in the calibration process and calculate the defective rate in the batch. And for the transformers in the same batch, the upper computer software draws a normalization curve by using the stored calibration coefficients and the channel attributes to evaluate the consistency of the transformer plates in the same batch.
Fig. 4 is a flowchart of a method for adjusting a transformer board of a relay protection device according to an embodiment of the present application.
As shown in fig. 4, in the method for tuning a transformer board of a relay protection device according to this embodiment, the method utilizes the transformer board tuning system of the relay protection device to tune a calibrated transformer board, and the method includes:
s1, connecting and communicating the calibration source and the calibration management board with an upper computer respectively;
s2, selecting a corresponding back motherboard according to the specification model and the European-style type of the mutual inductor board to be calibrated, replacing the back motherboard in a plugging mode, and inserting the mutual inductor board into a slot position corresponding to the back motherboard;
s3, starting a calibration source to output calibration voltage and calibration current, and performing calibration operation through a liquid crystal panel or an upper computer;
and S4, checking the defective rate and the consistency of the transformer boards in the batch or the total defective rate and the consistency in the batch through the statistical function of the upper computer software, and evaluating the transformer boards in the batch.
Specifically, in step S2, before the transformer board is inserted into the slot corresponding to the back motherboard, the method further includes the following steps: judging whether the mutual inductor board to be calibrated is a bare board, scanning the bar code number of the mutual inductor board by using a bar code scanning gun before the mutual inductor board is inserted into the slot position under the condition of the bare board, so that a calibration management board obtains the bar code number of the mutual inductor board to be inserted, then inserting the mutual inductor board into the case, mapping the calibration management board according to the bar code number and the insertion position at the moment, obtaining a unique software code through upper computer software, forming an identification code by the unique software code and the hardware code and storing the identification code into a storage medium of the mutual inductor board, and sequentially inserting the mutual inductor board one by one after the calibration management board controls an indicator lamp corresponding to the slot position to be turned on.
Further, in step S2, for the transformer board to be calibrated for the first time, the method further includes the following steps before calibration: the barcode scanning gun sends barcode number information to the calibration management board, the calibration management board inquires the transformer board on each slot position in a polling mode, tries to read the storage medium on the transformer board through an I2C bus, and respectively reads the hardware unique code and the software unique code in the address ADDR1 and the address ADDR2 on the storage medium. Because the calibration is performed for the first time, at this time, two codes read from the storage medium are both invalid codes, then the calibration management board writes a bar code number into the address ADDR1 to enable the hardware unique code to be solidified into the storage medium, meanwhile, the calibration management board uploads the hardware unique code to the upper computer software, the upper computer software distributes the software unique code, and then the calibration management board writes the code into the address ADDR2, so that the binding of the bar code number, the hardware unique code and the software unique code is realized, the identification code of the unique identifier is provided for the mutual inductor board, and the accurate management of the board card is realized. The software of the upper computer establishes a unique digital file for the board card, and the indexing is realized through the hardware number of the software.
More specifically, in step S2, the starting calibration source outputs a calibration voltage or a calibration current, and the calibration operation is performed by a liquid crystal panel or an upper computer, where the calibration process includes the following steps:
s21, opening an operation interface of the liquid crystal panel or the upper computer to set the channel type of the board card, and setting calibration voltage or calibration current; if the calibration source is operated by the liquid crystal panel, the calibration source is manually started to output the voltage or the current of the calibration level after the calibration source is set; if the calibration source is operated by the upper computer, the calibration source can be directly controlled to output corresponding voltage or current through the operation interface; then, the calibration is started through a calibration starting button of the liquid crystal panel or the upper computer interface;
s22, the calibration management board reads the hardware unique code and the software unique code on the mutual inductor boards ADDR1 and ADDR2 to be calibrated, then reads the channel type and the calibration coefficient in the address ADDR3 on the storage medium, if the calibration coefficient does not exist, the calibration management board reads the digital quantity information converted by the AD module through the FPGA of the CPU module according to 80-point sampling frequency to calculate a corresponding effective value, the effective value is compared with the calibration value of an external calibration source to obtain a channel calibration coefficient Kn value, if the Kn exceeds a certain range, the error uncorrectable criterion Kn is regarded as 1, then the Kn, the channel type and the corresponding relation are written into the ADDR3 of the mutual inductor boards, and if the calibration coefficient exists, the next step is executed;
s23, the calibration management board reads the calibration coefficient, converts the value read from the AD by the calibration coefficient Kn to obtain a sampling value, and compares the sampling value with the output value of the calibration source;
if the difference value between the two is not more than a first threshold value Th0, judging that the calibration coefficient is available and the transformer board of the channel is qualified;
if the difference value between the two is greater than a first threshold value Th0 and does not exceed a second threshold value Th1, recalibrating according to the step S22, uploading the calibration value to an upper computer, comparing whether the corresponding calibration coefficient of the board card exists or not through upper computer software, comparing the calibration coefficient with the historical calibration coefficient, and judging whether the board card is unstable or not according to the comparison result;
if the difference value of the two is larger than a second threshold Th1, the channel transformer board is judged to be unqualified, the condition of the channel transformer board is recorded in a batch defective rate evaluation function, and the defective rate of the board card calibrated at this time and the total defective rate of the batch are calculated respectively.
S24, the calibration management board uploads all calibration coefficients of the successfully calibrated mutual inductor board to an upper computer, the upper computer software records the calibration coefficient Kn of each channel into a digital file of the mutual inductor board, classifies the mutual inductors according to batch fields in the mutual inductor board code number, and counts the calibration coefficient and the calibration result of each mutual inductor into the consistency evaluation function of each batch, and the upper computer software also draws a calibration coefficient broken line graph according to the calibration coefficient of each channel mutual inductor in the batch and draws a normalization curve according to the distribution characteristics of the calibration coefficient, reminds the board cards with poor consistency and the mutual inductors of corresponding channels, and evaluates the consistency of the batch of board cards.
Furthermore, in step S2, when the replaced transformer board is damaged, the barcode number on the transformer board may be directly scanned, the calibration coefficient of the board card may be searched from the database through a one-key copy function, and the calibration coefficient may be directly written into the ferroelectric storage medium through the calibration management board, so that repeated calibration is not required, and the method is fast and convenient.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A mutual inductor plate adjusting system of a relay protection device is characterized by comprising a calibration source, a calibration device and an upper computer, wherein the two phases of the calibration source, the calibration device and the upper computer are connected with each other;
the calibration source provides voltage and current analog quantity for the calibration process;
the calibration device is used for calibrating the mutual inductor plate, reading and writing the calibration coefficient and the identification code and interacting with an upper computer;
the upper computer is provided with upper computer software, and the upper computer software is used for storing the board card information and the calibration coefficient of the mutual inductor board and providing statistical analysis of the defective rate and the consistency of the mutual inductor in batches.
2. The system according to claim 1, wherein the calibration device comprises a calibration management board, the calibration management board is connected to the transformer board and comprises a CPU module, an analog-to-digital conversion module, and a communication module; the CPU module is used for calibration logic, network communication and interaction with other board cards of the mutual inductor board; the analog-to-digital conversion module converts the analog signal into a digital signal; the communication module is used for communicating with an upper computer and the transformer board.
3. The system according to claim 2, wherein the calibration device further comprises a case, a back mother board, a liquid crystal panel, a front panel, and a barcode scanning gun, the calibration management panel is connected to the liquid crystal panel and the barcode scanning gun;
the back mother board is installed in a plugging mode, and the mutual inductor boards of different types and European-Jack types correspond to different back mother boards and are replaced by plugging according to calibration requirements;
the liquid crystal panel is used for information interaction in the calibration process;
the front panel is used for dividing keys, indicator lights and liquid crystal display areas;
the bar code scanning gun is used for scanning bar code numbers of the mutual inductor plate, acquiring hardware coding information of the mutual inductor plate and transmitting the hardware coding information to the calibration management plate.
4. The system for adjusting the transformer board of the relay protection device according to claim 2, wherein the upper computer is connected to the calibration source through a network port, and controls the output of the calibration source through a command; the upper computer is further connected with the calibration management board through a network port and used for storing and managing information of the mutual inductor boards, conducting induction statistics according to the information of the mutual inductor boards, prompting unqualified products appearing in the calibration process, calculating the defective rate in a batch, and conducting consistency evaluation analysis on the mutual inductor boards in the same batch.
5. A method for tuning a transformer board of a relay protection device, the method using the tuning system of claim 1-4 to tune the calibrated transformer board, the method comprising:
respectively connecting and communicating the calibration source and the calibration management board with an upper computer;
selecting a corresponding back motherboard according to the type of the mutual inductor board to be calibrated and the Euro-Jack type, and inserting the mutual inductor board into a slot position corresponding to the back motherboard;
starting a calibration source to output calibration voltage or calibration current, and performing calibration operation through a liquid crystal panel or an upper computer;
and checking the defective rate and the consistency of the transformer boards in the batch through the software of the upper computer, and evaluating the transformer boards in the batch.
6. The method for adjusting the transformer board of the relay protection device according to claim 5, wherein the step of inserting the transformer board into the back motherboard further comprises the steps of: and judging whether the mutual inductor board to be calibrated is a bare board, if so, scanning the bar code number of the mutual inductor board by using a bar code scanning gun, and inserting the mutual inductor boards in sequence after the calibration management board controls the indicator lamp of the corresponding slot position of the back motherboard to be turned on.
7. The method for calibrating transformer boards of relay protection devices according to claim 6, wherein the method further comprises the following steps before calibration for the transformer board to be calibrated for the first time: the calibration management board respectively reads the hardware code and the software code on the storage medium of the mutual inductor board; then writing a bar code number sent by a bar code scanning gun into a hardware code storage address of the mutual inductor plate to form a hardware unique code, and simultaneously transmitting the hardware unique code to an upper computer to be distributed with a software unique code by upper computer software; the calibration management board then writes the software unique code into the software code memory address of the transformer board.
8. The method for calibrating transformer boards of relay protection devices according to claim 7, wherein the calibration source is started to output a calibration voltage or a calibration current, and the calibration operation is performed by a liquid crystal panel or an upper computer, and the method specifically comprises the following steps:
setting the channel type of a mutual inductor plate, starting a calibration source to output calibration voltage or calibration current, and then starting a calibration start button of a liquid crystal plate or an upper computer interface to start calibration;
the calibration management board reads the hardware unique code, the software unique code, the channel type and the calibration coefficient of the mutual inductor board, converts the read numerical value into a sampling value through the calibration coefficient, and then compares the sampling value with the calibration source output value;
if the difference value between the two is not more than a first threshold value, judging that the calibration coefficient is available and the channel mutual inductor board is qualified, and uploading the calibration coefficient to an upper computer;
if the difference value of the two is larger than the first threshold value and not larger than the second threshold value, recalibrating, and uploading the calibration value to an upper computer;
and if the difference value of the two is greater than a second threshold value, judging that the channel mutual inductor plate is unqualified, and recording the mutual inductor plate condition into the batch defective rate evaluation of the upper computer software.
9. The method as claimed in claim 8, wherein when the calibration management board reads the calibration coefficient of the transformer board, if there is no calibration coefficient, the calibration management board reads the digital quantity information of the analog-to-digital conversion module through the CPU module to calculate the corresponding effective value, compares the effective value with the calibration value of the calibration source to obtain the calibration coefficient, and writes the calibration coefficient, the channel type, and the correspondence relationship into the transformer board.
10. The method as claimed in claim 5, wherein if the transformer board is a transformer board after replacing the ferroelectric memory, the barcode scanning gun is used to scan the barcode number of the transformer board directly, and the calibration coefficients of the transformer board are searched from the database and written into the ferroelectric memory medium directly through the calibration management board without repeated calibration.
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| CN202010708370.6A CN111812576A (en) | 2020-07-22 | 2020-07-22 | System and method for adjusting transformer board of relay protection device |
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| CN202010708370.6A CN111812576A (en) | 2020-07-22 | 2020-07-22 | System and method for adjusting transformer board of relay protection device |
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Application publication date: 20201023 |