CN110806521A - Replacement type overhaul testing device and method based on in-situ protection - Google Patents
Replacement type overhaul testing device and method based on in-situ protection Download PDFInfo
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Abstract
The invention provides a replacement type overhaul testing device and a replacement type overhaul testing method based on in-situ protection, wherein the device comprises a tested line protection device, a tested main transformer submachine and a tested bus submachine; the device also comprises a replaceable overhaul trolley and a testing device. The tested line protection device, the tested main transformer submachine and the tested bus submachine are horizontally and sequentially arranged on the upper part of the replacement type overhaul trolley, the testing device is arranged on the lower part of the replacement type overhaul trolley, and the testing device is respectively connected with the tested line protection device, the tested main transformer submachine and the tested bus submachine through signal lines. The replacement type overhaul for the transformer substation equipment aims at the test requirement of replacement type overhaul of a local protection device, and the detection platform can perform connection test on local line protection, local main transformer protection and local bus protection.
Description
Technical Field
The invention relates to the technical field of intelligent substations, in particular to a replacement type overhaul testing device and a replacement type overhaul testing method based on-site protection.
Background
The in-situ concept of the relay protection device is a new technical direction of the power industry developed by the national grid dispatching center organization in recent years, the in-situ protection installation mode of the intelligent substation changes the operation and maintenance mode of relay protection, field equipment fails or is abnormal, the replacement type maintenance center is informed, after the standby equipment is selected to be qualified for inspection, the replacement operation is carried out on site, the equipment detection work is completed in the replacement type maintenance center, and only loop detection and whole group detection are carried out on site.
The realization form of the on-site protection device also puts new requirements on-site protection detection equipment, and the protection detection equipment of the intelligent substation cannot completely meet the detection requirements of the on-site protection device.
The testing method comprises the steps that a protection device in a traditional transformer substation is tested, testing equipment outputs analog quantity voltage and current, hard contact switching value information is received, the protection device in an intelligent transformer substation is tested, the protection device in the intelligent transformer substation is tested, the testing equipment outputs digital quantity information and receives digital quantity information, after the protection device is locally implemented, a transformer protection sub-machine and a bus protection sub-machine receive local analog quantity signals and other digital quantity looped network protocol signals of interval protection, and the analog quantity and the digital quantity are required to be output and tested simultaneously.
The existing test equipment of the bus cannot carry out comprehensive and integral detection on the in-situ protection device. The on-site relay protection device detection and maintenance method based on the on-site protection technology has the advantages that detection analysis is carried out according to the test requirements of 'replacement type maintenance' of the on-site protection device, the technical scheme of replacement type maintenance is provided, on-site reduction detection is carried out on the on-site protection device, comprehensive detection and automatic detection of the on-site device are achieved, the quality of the on-site relay protection device is accurately evaluated, safe and stable operation of a power system is guaranteed, the inlet quality of the on-site protection device is strictly closed according to the operation characteristics of the on-site protection device, and maintenance configuration management of the replacement type on-site protection device is. Therefore, an integrated in-situ device-specific detection device is required for completing the in-situ protection device test.
The on-site secondary equipment is a brand new mode of designing, constructing, operating and maintaining the transformer substation by combining technology and standard. The in-situ protection device mainly comprises three types, namely an in-situ line protection device, an in-situ main transformer protection submachine and an in-situ bus protection submachine. The realization form of the on-site protection device also puts new requirements on the on-site protection detection equipment, the protection detection equipment of the intelligent substation can not completely meet the detection requirements of the on-site protection device, and a special detection system for the on-site protection device, which integrates a hardware platform with the functions of analog quantity, digital quantity, looped network protocol, time synchronization and the like and a software platform with the functions of automatic testing and the like, is needed.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a replacement type overhaul testing device and method based on-site protection, which are used for replacement type overhaul of transformer substation equipment, and aiming at the testing requirement of replacement type overhaul of a on-site protection device, a detection platform can carry out connection testing on-site line protection, on-site main transformer protection and on-site bus protection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a replacement type overhaul testing device based on in-situ protection comprises a tested line protection device, a tested main transformer submachine and a tested bus submachine; the device also comprises a replaceable overhaul trolley and a testing device.
The tested line protection device, the tested main transformer submachine and the tested bus submachine are horizontally and sequentially arranged on the upper part of the replacement type overhaul trolley, the testing device is arranged on the lower part of the replacement type overhaul trolley, and the testing device is respectively connected with the tested line protection device, the tested main transformer submachine and the tested bus submachine through signal lines.
Furthermore, the replacement type overhaul trolley is of a box type structure and is divided into an upper layer and a lower layer, a plurality of walking wheels are arranged at the bottom of the replacement type overhaul trolley, the tested line protection device, the tested main transformer sub-machine and the tested bus sub-machine are arranged on the upper layer, and the testing device is arranged on the lower layer.
Further, testing arrangement include test component, relay auto-change over device, photoelectric switch and computer, test component includes mainboard module, current detection module, voltage detection module, digital communication module and switching value input/output module, and current detection module, voltage detection module, digital communication module and switching value input/output module all link to each other with the mainboard module through communication mode.
Furthermore, the external ports of the current detection module and the voltage detection module are connected with a relay switching device, and the output port of the relay switching device is respectively connected with the line protection device to be tested, the main sub-machine to be tested and the bus sub-machine to be tested through an aviation plug.
Further, an external optical port of the digital communication module is respectively connected with the line protection device to be tested, the main transformer sub-machine to be tested and the bus sub-machine to be tested through a ring network protocol and a 9-2\ Goose protocol.
Furthermore, the external port of the switching value input/output module is a tripping contact signal point, and is respectively connected with the line protection device to be tested, the main substation to be tested and the bus substation to be tested through signal lines.
A replacement type overhaul testing method based on in-situ protection comprises the following steps:
1) the mainboard module comprises a mainboard system consisting of an FPGA and an ARM, the ARM is communicated with the computer through an Ethernet communication protocol to acquire instructions and data information sent by the computer, the ARM sends the received instructions to the mainboard FPGA and sends the received data information to the mainboard FPGA through logic calculation, the mainboard FPGA carries out command operations such as data processing distribution and optical port data configuration and sends the command operations to the FPGAs of the modules through the mainboard FPGA, and each module FPGA receives the data information and clock information provided by the mainboard FPGA and converts the data information into sampling rate 2000 point, maximum 8000 point, sine wave output or switching value output;
2) meanwhile, the mainboard module is provided with a time synchronization receiving circuit, receives an external time synchronization signal, and transmits the time synchronization signal to the FPGAs of other modules through the FPGA, so that the modules can reference the same clock source. The analog quantity module and the digital quantity module refer to the same clock source, and the FGPA sets the phase of the output analog quantity voltage current and the phase of the output digital quantity voltage current to an initial phase according to the pulse per second information so as to ensure that the analog quantity output and the digital quantity output are synchronous in phase;
the initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us;
a1＝b1-(c1/20000)x360
3) similarly, each module FGPA marks a timestamp on the received 9-2, Goose, looped network protocol and switching value input information, analyzes and extracts the information, sends the information to the mainboard FPGA, provides the information for the ARM for logic processing by the mainboard FGPA, forms a closed-loop test, records the action time of the protection device and the like, and feeds back real-time data or a measurement result to the computer;
the FPGA of the mainboard issues instruction operation:
9-2 transmitting and optical port and group number configuration;
9-2 receiving and optical port and group number configuration;
goose sending and optical port and group number configuration;
goose receiving and optical port and group number configuration;
ring network protocol transmission and optical port configuration;
9-2 and Goose simultaneous mode;
the operation of the switching value;
operating on the analog quantity;
analog quantity and digital quantity simultaneous mode: the digital quantities comprise: 9-2, Goose, ring network protocol.
The replacement type overhaul testing method based on in-situ protection comprises the following steps:
step 1: classifying equipment and marking two-dimension code information in a storehouse;
step 2: taking the equipment from the storehouse, placing the equipment on a spot detection platform, and automatically connecting and fixing the equipment;
and step 3: automatically loading the device model detection template from a test template library by scanning two-dimensional code information, wherein the test template library is a full-range detection project template customized according to maintenance regulations;
and 4, step 4: downloading the file, reading the device information through MMS, checking and comparing, including: constant value checking, configuration file checking and model checking;
and 5: one-click automatic test: SV point alignment, GOOSE point alignment, input and output transmission; sending an analog quantity reading remote signal to realize closed loop point alignment, and realizing closed loop point alignment test of switching value information by sending a remote control command and receiving remote measurement information; protection logic verification, namely reading the information of the fixed value pressing plate to perform one-button automatic test;
step 6: and automatically generating a test report and carrying out statistical analysis.
In the step 4, the file comparison maps the key code value of the backup file to a position in the table to access the record through a hash table method, so as to accelerate the searching speed. And storing the flag bits of the GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements in the backup file 1 in an array respectively by using a hash table principle, and storing the flag bits of the GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements consistent with the backup file 1 in the backup file 2 in another array respectively. And respectively and sequentially comparing corresponding elements in the corresponding flag bit arrays in the two files so as to judge whether the backup files are consistent.
In the in-place protection logic test, the element protection needs the analog quantity and the looped network protocol/special protocol synchronous output to carry out the logic test, the analog quantity and the digital quantity are synchronously output, the parameter control mainboard module simultaneously issues parameters to the analog quantity control module and the digital quantity control module, the analog quantity board and the digital quantity board are provided with independent FGPA programs to independently carry out positive wave calculation, the FPGA of the analog quantity output board and the FPGA of the digital quantity output board quote the same clock source, the FGPA controls the output of the analog quantity phase and the digital quantity phase, the initial phase of the analog quantity and the digital quantity is reset every time one second pulse information is received, the inherent delay of the hardware of the analog quantity output board and the hardware of the digital quantity output board is compensated through the hardware, and the synchronization of the analog quantity output board and the digital quantity output phase is ensured. The initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us; a1 ═ b1- (c1/20000) x 360.
The in-situ protection private network test is used for testing SV uniformity, abnormal statistics, SV consistency, GOOSE real-time property and GOOSE consistency. The invention is realized by adopting a synchronization method and an interpolation recurrence method.
The system is additionally provided with looped network protocol output, looped network protocol abnormal simulation output is realized according to an SV/GOOSE abnormal simulation mechanism, serial number control is carried out during packet packaging to realize looped network message frame loss and wrong sequence abnormal simulation, looped network message sending interval test is realized for sending sequence control, and looped network delay abnormity is simulated by changing delay parameters and associated phase values.
Compared with the prior art, the invention has the beneficial effects that:
1. the intelligent substation on-site protection installation mode changes a relay protection operation mode, if field equipment fails or is abnormal, standby equipment is selected, after the replacement type overhaul testing device based on-site protection is qualified, replacement operation can be carried out on site, and after replacement, only loop detection and whole group detection are carried out on site;
2. the test system adopts a movable trolley type test platform for integrated test, so that the equipment is convenient to move;
3. the three tested devices are respectively switched and tested by the same testing device according to requirements in a relay switching mode;
4. the test system adopts the high-precision core processing unit to realize digital message sending, completes data receiving and sending processing in parallel, realizes zero-delay processing among multiple channels, and ensures reliable data receiving and sending, thereby ensuring reliable detection of secondary equipment. The test system can realize the ring network protocol analog output and realize the synchronous output function of analog quantity and digital quantity.
5. The test system can realize the ring network protocol analog output and realize the synchronous output function of analog quantity and digital quantity; the test system realizes various synchronous modes, including GPS, IRIGB and IEEE1588 time synchronization schemes. The IEEE1588 master-slave clock synchronization precision can reach hundreds of ns.
Drawings
FIG. 1 is a cart-type configuration of the replacement service test apparatus based on in-situ protection according to the present invention;
FIG. 2 is an electrical structural view of the test apparatus of the present invention;
FIG. 3 is a system connection configuration diagram of the test apparatus of the present invention;
FIG. 4 is an electrical block diagram of a motherboard module of the test assembly of the present invention;
FIG. 5 is an electrical block diagram of the current sensing module and the voltage sensing module of the test assembly of the present invention;
FIG. 6 is an electrical block diagram of a digital communication module of the test assembly of the present invention;
FIG. 7 is an electrical configuration diagram of a switching value input/output module of the test assembly of the present invention;
FIG. 8 is an electrical block diagram of the relay switching apparatus of the test assembly of the present invention;
FIG. 9 is a flow chart of the replacement detection based on in-place protection according to the present invention;
FIG. 10 is a flow chart of a replacement service test method based on in-place protection of the present invention 1;
FIG. 11 is a flow chart of the replacement service testing method based on in-place protection of the present invention, FIG. 2.
In the figure: 1-replacement type maintenance trolley 2-tested line protection device 3-tested main transformer sub-machine 4-tested bus sub-machine 5-testing device 6-walking wheel.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, a replacement type overhaul test device based on in-situ protection comprises a replacement type overhaul trolley 1, a tested line protection device 2, a tested main transformer sub-machine 3, a tested bus sub-machine 4 and a test device 5, wherein the tested line protection device 2, the tested main transformer sub-machine 3 and the tested bus sub-machine 4 are all devices of an original intelligent substation.
The replacement type overhaul trolley 1 is of a box type structure and is divided into an upper layer and a lower layer, the bottom of the replacement type overhaul trolley is provided with a plurality of walking wheels 6, the tested line protection device 2, the tested main transformer sub-machine 3 and the tested bus sub-machine 4 are placed on the upper layer, and the testing device 5 is placed on the lower layer. The tested line protection device 2, the tested main transformer sub-machine 3 and the tested bus sub-machine 4 are horizontally and sequentially arranged on the upper part of the replacement type maintenance trolley 1, the testing device 5 is arranged on the lower part of the replacement type maintenance trolley 1, and the testing device 5 is respectively connected with the tested line protection device 2, the tested main transformer sub-machine 3 and the tested bus sub-machine 4 through signal lines.
As shown in fig. 2-3, the testing device 5 includes a housing and an electrical component inside the housing, the electrical component includes a testing component, a relay switching device, a photoelectric switch and a computer, the testing component includes a motherboard module, a current detection module, a voltage detection module, a digital communication module and a switching value input/output module, and the current detection module, the voltage detection module, the digital communication module and the switching value input/output module are all connected with the motherboard module in a bus communication manner.
The external ports of the current detection module and the voltage detection module are connected with the relay switching device, and the output port of the relay switching device is respectively connected with the line protection device to be tested, the main sub-machine to be tested and the bus sub-machine to be tested through the aviation plug.
The external light port of the digital communication module is respectively connected with the line protection device to be tested, the main transformer sub-machine to be tested and the bus sub-machine to be tested through a ring network protocol and a 9-2\ Goose protocol.
The external port of the switching value input and output module is a tripping contact signal point and is respectively connected with the line protection device to be tested, the main transformer submachine to be tested and the bus submachine to be tested through signal lines.
As shown in fig. 4, the main board module includes a SOC chip CPU module (including FPGA + ARM) and an ethernet module connected thereto, the main board module is connected to a computer through a TCP/IP protocol of an ethernet port, the computer is connected to an optical fiber through a photoelectric switch, and is connected to a line protection device to be tested, a main sub-machine to be tested, and a bus sub-machine to be tested through the optical fiber.
As shown in fig. 5, the internal circuit structure diagrams of the current detection module and the voltage detection module are shown, the internal circuit structures of the current detection module and the voltage detection module are the same, a voltage or current signal enters the power amplifier through the external port, then enters the FPGA for processing after analog-to-digital conversion, and then sends the signal to the motherboard module through the communication port.
As shown in fig. 6, the internal circuit structure diagram of the digital communication module includes an FPGA chip and an optical communication interface connected thereto, a 100Mbps optical transceiver module, and a 1000Mbps optical transceiver module, and the digital quantity interface of the line protection device to be tested, the main sub-machine to be tested, and the bus sub-machine to be tested is tested through the optical communication interface.
As shown in fig. 7, the internal circuit structure diagram of the switching value input/output module includes an FPGA chip, the FPGA chip is connected to an external switching value input interface and an external switching value output interface through optical coupling isolation, and the switching value input interface and the switching value output interface are used for connection testing of tripping contact signals of the line protection device to be tested, the main substation to be tested, and the bus substation to be tested.
As shown in fig. 8, the electrical connection structure diagram of the relay switching device is shown, the relay switching device is a general relay, and the normal open or normal close contact of the relay is used to perform the switching test on the voltage or current detection signal of the line protection device to be tested, the main substation to be tested, and the bus substation to be tested.
The on-site replacement type overhaul and test system adopts a movable detection platform with pulleys, the detection platform can carry out connection test on-site line protection, on-site main transformer protection and on-site bus protection, only one protection device can be tested at each time, and the simultaneous test of multiple devices is not supported.
The test system is connected by adopting prefabricated aerial plug, the aerial plug wiring and the protection device adopt an automatic connection mode, automatic connection is compatible with various aerial plug connectors, high connection efficiency is achieved, and the advantage of automatic connection is embodied.
The test system comprises components such as an output assembly, a photoelectric switch, a relay switching device, a computer, an optical cable, an electric cable and the like.
Output component, core part of test system:
the circuit has 6 paths of 20A high-precision analog quantity current output and 6-120V high-precision analog quantity voltage output;
the optical fiber transceiver is provided with 4 pairs of hundred-million optical fiber interfaces, and can receive and transmit 61850-9-2 messages and Goose message information;
4 pairs of kilomega optical fiber interfaces are provided, and ring network protocol messages can be received and transmitted;
the protection device is provided with 8 paths of switching value input interfaces and 8 pairs of switching value output interfaces and is used for testing the action time of the protection device;
meanwhile, the system also has optical IRIG-B, GPS and IEEE1588 time setting interfaces.
The relay switching device is used for switching between the output assembly and the tested local protection device, when the tested device is selected, the relay switching device switches the analog quantity voltage and current wiring of the output assembly to the corresponding tested device interface, and the relay switching device is connected with the tested device through an aviation plug.
The photoelectric exchanger is used as a communication conversion device between the output component and the computer, and is also used for the communication conversion between the tested local protection device and the computer.
The computer is a software carrier of the on-site replacement type maintenance platform, the test software system runs in the computer, the control output assembly outputs analog quantity or digital quantity messages according to the test logic, and meanwhile MMS communication is carried out between the test software system and the tested on-site device.
A replacement type overhaul testing method based on in-situ protection comprises the following steps:
1) the mainboard module comprises a mainboard system consisting of an FPGA and an ARM, the ARM is communicated with the computer through an Ethernet communication protocol to acquire instructions and data information sent by the computer, the ARM sends the received instructions to the mainboard FPGA and sends the received data information to the mainboard FPGA through logic calculation, the mainboard FPGA carries out command operations such as data processing distribution and optical port data configuration and sends the command operations to the FPGAs of the modules through the mainboard FPGA, and each module FPGA receives the data information and clock information provided by the mainboard FPGA and converts the data information into sampling rate 2000 point, maximum 8000 point, sine wave output or switching value output;
2) meanwhile, the mainboard module is provided with a time synchronization receiving circuit, receives an external time synchronization signal, and transmits the time synchronization signal to the FPGAs of other modules through the FPGA, so that the modules can reference the same clock source. The analog quantity module and the digital quantity module refer to the same clock source, and the FGPA sets the phase of the output analog quantity voltage current and the phase of the output digital quantity voltage current to an initial phase according to the pulse per second information so as to ensure that the analog quantity output and the digital quantity output are synchronous in phase;
the initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us;
a1＝b1-(c1/20000)x360
3) similarly, each module FGPA marks a timestamp on the received 9-2, Goose, looped network protocol and switching value input information, analyzes and extracts the information, sends the information to the mainboard FPGA, provides the information for the ARM for logic processing by the mainboard FGPA, forms a closed-loop test, records the action time of the protection device and the like, and feeds back real-time data or a measurement result to the computer;
the FPGA of the mainboard issues instruction operation:
9-2 transmitting and optical port and group number configuration;
9-2 receiving and optical port and group number configuration;
goose sending and optical port and group number configuration;
goose receiving and optical port and group number configuration;
ring network protocol transmission and optical port configuration;
9-2 and Goose simultaneous mode;
the operation of the switching value;
operating on the analog quantity;
analog quantity and digital quantity simultaneous mode: the digital quantities comprise: 9-2, Goose, ring network protocol.
As shown in fig. 9-11, the replacement type service test method based on in-situ protection includes the following steps:
step 1: classifying equipment and marking two-dimension code information in a storehouse;
step 2: taking the equipment from the storehouse, placing the equipment on a spot detection platform, and automatically connecting and fixing the equipment;
and step 3: automatically loading the device model detection template from a test template library by scanning two-dimensional code information, wherein the test template library is a full-range detection project template customized according to maintenance regulations;
and 4, step 4: downloading the file, reading the device information through MMS, checking and comparing, including: constant value checking, configuration file checking and model checking;
and 5: one-click automatic test: SV point alignment, GOOSE point alignment, input and output transmission; sending an analog quantity reading remote signal to realize closed loop point alignment, and realizing closed loop point alignment test of switching value information by sending a remote control command and receiving remote measurement information; protection logic verification, namely reading the information of the fixed value pressing plate to perform one-button automatic test;
step 6: and automatically generating a test report and carrying out statistical analysis.
In the step 4, the file comparison maps the key code value of the backup file to a position in the table to access the record through a hash table method, so as to accelerate the searching speed. And storing the flag bits of the GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements in the backup file 1 in an array respectively by using a hash table principle, and storing the flag bits of the GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements consistent with the backup file 1 in the backup file 2 in another array respectively. And respectively and sequentially comparing corresponding elements in the corresponding flag bit arrays in the two files so as to judge whether the backup files are consistent.
In the in-place protection logic test, the element protection needs the analog quantity and the looped network protocol/special protocol synchronous output to carry out the logic test, the analog quantity and the digital quantity are synchronously output, the parameter control mainboard module simultaneously issues parameters to the analog quantity control module and the digital quantity control module, the analog quantity board and the digital quantity board are provided with independent FGPA programs to independently carry out positive wave calculation, the FPGA of the analog quantity output board and the FPGA of the digital quantity output board quote the same clock source, the FGPA controls the output of the analog quantity phase and the digital quantity phase, the initial phase of the analog quantity and the digital quantity is reset every time one second pulse information is received, the inherent delay of the hardware of the analog quantity output board and the hardware of the digital quantity output board is compensated through the hardware, and the synchronization of the analog quantity output board and the digital quantity output phase is ensured. The initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us; a1 ═ b1- (c1/20000) x 360.
The in-situ protection private network test is used for testing SV uniformity, abnormal statistics, SV consistency, GOOSE real-time property and GOOSE consistency. The invention is realized by adopting a synchronization method and an interpolation recurrence method.
The system is additionally provided with looped network protocol output, looped network protocol abnormal simulation output is realized according to an SV/GOOSE abnormal simulation mechanism, serial number control is carried out during packet packaging to realize looped network message frame loss and wrong sequence abnormal simulation, looped network message sending interval test is realized for sending sequence control, and looped network delay abnormity is simulated by changing delay parameters and associated phase values.
The on-site replacement type overhaul software is taken as an integral system management test software, and comprises a warehouse spare part management record, system authority access limitation, a template database management system, a protection test system, a point-to-point test system, a file comparison test system and a test report database management system.
The software architecture comprises:
a toolbar;
a test item list bar;
a test interface bar or a test progress display bar;
a real-time data display area;
a device status display area;
a test result display area;
the software functions comprise:
entering a test system according to the access authority;
the method comprises the following steps of managing a test template and a test report, automatically generating a test case through two-dimensional code scanning, automatically testing, automatically generating a test report and reporting to a management system;
file comparison test, constant value file comparison test, configuration file comparison test and model file comparison test;
a single-device one-button automatic test system (in-situ protection device action logic test);
the device SV is used for point alignment, the Goose is used for point alignment, and an entrance and exit point alignment test system is opened;
and (4) report management, namely forming a test acceptance report which contains all the test items of the replacement type overhaul and accords with the field acceptance.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (10)
1. A replacement type overhaul testing device based on in-situ protection comprises a tested line protection device, a tested main transformer submachine and a tested bus submachine; the device is characterized by also comprising a replaceable overhaul trolley and a testing device;
the tested line protection device, the tested main transformer submachine and the tested bus submachine are horizontally and sequentially arranged on the upper part of the replacement type overhaul trolley, the testing device is arranged on the lower part of the replacement type overhaul trolley, and the testing device is respectively connected with the tested line protection device, the tested main transformer submachine and the tested bus submachine through signal lines.
2. The replacement type overhaul testing device based on in-situ protection according to claim 1, wherein the testing device comprises a testing component, a relay switching device, a photoelectric switch and a computer, the testing component comprises a mainboard module, a current detection module, a voltage detection module, a digital communication module and a switching value input and output module, and the current detection module, the voltage detection module, the digital communication module and the switching value input and output module are all connected with the mainboard module in a communication mode.
3. The replacement type overhaul testing device based on in-situ protection as claimed in claim 2, wherein the external ports of the current detection module and the voltage detection module are connected with the relay switching device, and the output port of the relay switching device is connected with the line protection device to be tested, the main sub-machine to be tested and the bus sub-machine to be tested through aviation plugs.
4. The replacement type overhaul testing device based on in-situ protection as claimed in claim 2, wherein the external optical port of the digital communication module is connected to the line protection device to be tested, the main sub-machine to be tested and the bus sub-machine to be tested respectively via a ring network protocol and a 9-2\ Goose protocol.
5. The replacement type overhaul testing device based on in-situ protection as claimed in claim 2, wherein the external port of the switching value input/output module is a tripping contact signal point, and is connected with the line protection device to be tested, the main sub-machine to be tested and the bus sub-machine to be tested through signal lines.
6. A replacement type overhaul testing method based on in-situ protection is characterized by comprising the following steps:
1) the mainboard module comprises a mainboard system consisting of an FPGA and an ARM, the ARM is communicated with the computer through an Ethernet communication protocol to acquire instructions and data information sent by the computer, the ARM sends the received instructions to the mainboard FPGA and sends the received data information to the mainboard FPGA through logic calculation, the mainboard FPGA carries out command operations such as data processing distribution and optical port data configuration and sends the command operations to the FPGAs of the modules through the mainboard FPGA, and each module FPGA receives the data information and clock information provided by the mainboard FPGA and converts the data information into sampling rate 2000 point, maximum 8000 point, sine wave output or switching value output;
2) meanwhile, the mainboard module is provided with a time synchronization receiving circuit, receives an external time synchronization signal and issues the time synchronization signal to the FPGAs of other modules through the FPGA, so that the modules are ensured to reference the same clock source; the analog quantity module and the digital quantity module refer to the same clock source, and the FGPA sets the phase of the output analog quantity voltage current and the phase of the output digital quantity voltage current to an initial phase according to the pulse per second information so as to ensure that the analog quantity output and the digital quantity output are synchronous in phase;
the initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us;
a1＝b1-(c1/20000)x360
3) similarly, each module FGPA marks a timestamp on the received 9-2, Goose, looped network protocol and switching value input information, analyzes and extracts the information, sends the information to the mainboard FPGA, provides the information for the ARM for logic processing by the mainboard FGPA, forms a closed-loop test, records the action time of the protection device and the like, and feeds back real-time data or a measurement result to the computer;
the FPGA of the mainboard issues instruction operation:
9-2 transmitting and optical port and group number configuration;
9-2 receiving and optical port and group number configuration;
goose sending and optical port and group number configuration;
goose receiving and optical port and group number configuration;
ring network protocol transmission and optical port configuration;
9-2 and Goose simultaneous mode;
the operation of the switching value;
operating on the analog quantity;
analog quantity and digital quantity simultaneous mode: the digital quantities comprise: 9-2, Goose, ring network protocol.
7. The replacement type overhaul testing method based on in-situ protection as claimed in claim 6, characterized by comprising the following steps:
step 1: classifying equipment and marking two-dimension code information in a storehouse;
step 2: taking the equipment from the storehouse, placing the equipment on a spot detection platform, and automatically connecting and fixing the equipment;
and step 3: automatically loading the device model detection template from a test template library by scanning two-dimensional code information, wherein the test template library is a full-range detection project template customized according to maintenance regulations;
and 4, step 4: downloading the file, reading the device information through MMS, checking and comparing, including: constant value checking, configuration file checking and model checking;
and 5: one-click automatic test: SV point alignment, GOOSE point alignment, input and output transmission; sending an analog quantity reading remote signal to realize closed loop point alignment, and realizing closed loop point alignment test of switching value information by sending a remote control command and receiving remote measurement information; protection logic verification, namely reading the information of the fixed value pressing plate to perform one-button automatic test;
step 6: and automatically generating a test report and carrying out statistical analysis.
8. The replacement type overhaul testing method based on in-place protection as claimed in claim 7, wherein in the step 4, the key code value of the backup file is mapped to a position in the table to access the record through a hash table method by file comparison, so as to speed up the search; storing flag bits of GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements in the backup file 1 in an array respectively by utilizing a Hash table method principle, and storing flag bits of the GOOSE release, GOOSE subscription, SV release, SV subscription and CRC elements which are consistent with the backup file 1 in the backup file 2 in another array respectively; and respectively and sequentially comparing corresponding elements in the corresponding flag bit arrays in the two files so as to judge whether the backup files are consistent.
9. The replacement type overhaul testing method based on in-place protection according to claim 7, the method is characterized in that in-situ protection logic testing, element protection requires analog quantity and looped network protocol/special protocol synchronous output for logic testing, the analog quantity and digital quantity are synchronously output, a mainboard module for realizing parameter control simultaneously issues parameters to the analog quantity office and the digital quantity office, the analog quantity board and the digital quantity board are provided with independent FGPA programs and independently perform positive ripple calculation, the FPGA of the analog quantity output board and the FPGA of the digital quantity output board quote the same clock source, the FGPA controls the output of the analog quantity phase and the digital quantity phase, the initial phase of the analog quantity and the digital quantity is reset after receiving pulse information of one second, the inherent delay of the hardware of the analog quantity output board and the hardware of the digital quantity output board is compensated through the hardware, and the synchronization of the analog quantity output and the digital quantity output phase is ensured; the initial phase of analog quantity output is a1, the initial phase of digital quantity output is b1, and the time delay of the looped network protocol is c1 us; a1 ═ b1- (c1/20000) x 360.
10. The replacement type overhaul testing method based on in-situ protection as claimed in claim 7, further comprising a network anomaly simulation technique, wherein the system is added with a looped network protocol output, the looped network protocol anomaly simulation output is realized according to SV/GOOSE anomaly simulation mechanism, the sequence number control is performed during packet to realize looped network packet loss frame error sequence anomaly simulation, the looped network packet transmission interval test is realized for transmission timing control, and the looped network delay anomaly is simulated by changing the delay parameter and the associated phase value.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111208379A (en) * | 2020-03-19 | 2020-05-29 | 国网福建省电力有限公司 | Portable on-site bus protection submachine testing device |
| CN111257682A (en) * | 2020-03-19 | 2020-06-09 | 国网福建省电力有限公司 | On-site function detection method for portable on-site bus protection submachine |
| CN111426895A (en) * | 2020-04-02 | 2020-07-17 | 国网新疆电力有限公司电力科学研究院 | In-situ protection device test system and test method thereof |
| CN112415421A (en) * | 2020-11-04 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司柳州局 | Handheld secondary loop tester based on Xilinx operating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208379A (en) * | 2020-03-19 | 2020-05-29 | 国网福建省电力有限公司 | Portable on-site bus protection submachine testing device |
| CN111257682A (en) * | 2020-03-19 | 2020-06-09 | 国网福建省电力有限公司 | On-site function detection method for portable on-site bus protection submachine |
| CN111426895A (en) * | 2020-04-02 | 2020-07-17 | 国网新疆电力有限公司电力科学研究院 | In-situ protection device test system and test method thereof |
| CN112415421A (en) * | 2020-11-04 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司柳州局 | Handheld secondary loop tester based on Xilinx operating system |
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