CN111987733A - High-voltage flexible straight submodule fault automatic positioning device - Google Patents
High-voltage flexible straight submodule fault automatic positioning device Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention relates to a high-voltage flexible-straight submodule fault automatic positioning device. Comprises an interface layer and an application layer; the interface layer directly faces the sub-module, provides an energy source and a control instruction for the sub-module, simultaneously acquires external information of the sub-module, and transmits the external information to the application layer for processing and judgment; the interface layer comprises a high-voltage power supply, a controller, an oscilloscope and a high-voltage probe; the application layer directly controls the interface layer and receives data from the interface layer, wherein the data of the interface layer comprises interface layer data and submodule data. The invention utilizes the program control technology to realize the automatic control of the auxiliary measuring device, reduces the voltage grade according to the actual test requirement, reduces the volume of equipment such as a power supply and the like, integrates equipment such as an oscilloscope, a high-voltage probe and the like into a whole, provides the high-voltage high-capacity flexible direct-current transmission converter station with high compactness, high automation degree and high safety, and meets the test requirement of the high-voltage high-capacity flexible direct-current transmission converter station on the site for the converter valve submodule.
Description
Technical Field
The invention belongs to the field of high-voltage high-capacity flexible direct-current transmission engineering detection equipment, and particularly relates to an automatic fault positioning device for a high-voltage flexible direct-current module.
Background
The core equipment of the flexible direct current transmission (VSC-HVDC) technology is a converter valve, the sub-modules are basic power units of a modular multi-level converter valve (MMC), various primary power elements and secondary control board cards are integrated, the converter valve is composed of more than ten elements, the intelligent and integrated degree is high, the number of the sub-modules of the converter valve of a single engineering project is large, and the level generally reaches thousands of levels. At present, due to lack of experience for reference, sub-module fault types often cannot be quickly and accurately positioned, and the sub-modules need to be comprehensively checked. In addition, because the sub-module fault cannot be repaired in a targeted manner, the sub-module maintenance method mainly replaces the spare sub-module, and a comprehensive test is required after the repair is completed to determine that the sub-module has a normal working condition. The fault diagnosis device of the submodule depends on a function test platform in a factory, comprises a high-voltage power supply, a voltage probe, a controller and other various test equipment, and has the defects of high voltage, large equipment volume, large occupied area of a field, low intelligent degree and the like. Limited by the limitation of sites and maintenance time, the converter station operators cannot adopt the same mode to carry out large-scale fault location and maintenance work. With the increase of the number of flexible direct current transmission projects, a submodule fault positioning device for a converter station field needs to be researched and developed, and the requirement for safe operation of the projects is met.
The conventional submodule fault positioning device is an in-plant function test platform, the occupied area of the function test platform is large, complete function test is required for fault positioning, the fault position of a submodule is determined by manually judging test data, and the submodule fault positioning device has the advantages of low positioning speed, low intelligent/automatic degree, multiple manual participation steps and easiness in causing detection errors; and the sub-module fault repairing means is single, the pertinence is lacked, and the sub-module can be determined to be recovered to the normal state only by carrying out comprehensive testing after the fault repairing. Overall, the existing device has low efficiency, more manual work participation, excessive labor consumption of maintainers and overlong outage time caused by maintenance.
Disclosure of Invention
The invention aims to provide a high-voltage flexible direct-current sub-module fault automatic positioning device, which utilizes a program control technology to realize automatic control of an auxiliary measuring device, reduces the voltage level according to the actual test requirement, reduces the volume of equipment such as a power supply and the like, integrates equipment such as an oscilloscope, a high-voltage probe and the like into a whole, provides a detection device which is compact, high in automation degree and high in safety, has a size suitable for field test, and meets the field test requirement of a high-voltage large-capacity flexible direct-current power transmission converter station on a converter valve sub-module. Quick restoration and quick detection after restoration of submodule pieces are facilitated, and maintenance efficiency of flexible straight submodule pieces is improved
In order to achieve the purpose, the technical scheme of the invention is as follows: a high-voltage flexible-straight submodule fault automatic positioning device comprises an interface layer and an application layer;
the interface layer directly faces the sub-module, provides an energy source and a control instruction for the sub-module, simultaneously acquires external information of the sub-module, and transmits the external information to the application layer for processing and judgment; the interface layer comprises a high-voltage power supply, a controller, an oscilloscope and a high-voltage probe;
the high-voltage power supply is responsible for providing an energy supply power supply for the sub-module, the high-voltage power supply adopts single-phase mains supply to directly supply power, the application layer uses a program control technology to directly control the output voltage and current of the high-voltage power supply, the output of the high-voltage power supply adopts an adjustable circuit topological structure, the voltage and current output range is adjustable, and an output protection and locking module is configured to ensure the test power utilization safety; the output side of the high-voltage power supply also comprises a high-voltage relay for preventing electric energy from flowing backwards, and the high-voltage relay is automatically switched off after the high-voltage power supply does not output;
the controller is responsible for communicating with the sub-module, issuing a sub-module control instruction and receiving return information of the sub-module, and is connected by adopting optical fibers, so that partial functions of a sub-module control system can be simulated; the controller collects and preprocesses information, generates a monitoring state of the sub-module, and sends the monitoring state to the application layer, and the application layer uses a program control technology to communicate with the controller, so that control instructions of the controller and the tested sub-module are issued and the state of the sub-module is uploaded;
the oscilloscope and the high-voltage probe are used for isolating and converting the high-voltage signal output by the tested submodule into a low-voltage signal, analyzing the elements of the signal including amplitude and frequency, and then sending the signal to an application layer through a program control technology;
the application layer directly controls the interface layer and receives data from the interface layer, wherein the data of the interface layer comprises interface layer data and submodule data; and the application layer adopts an expert knowledge base to classify the sub-module faults, analyzes the characteristics of the faults, traverses the sub-module fault information, forms a knowledge base according to the data and the action time sequence thereof, and compares the sub-module state information with the contents of the knowledge base after receiving the sub-module state information to realize the automatic judgment of the sub-module faults.
In one embodiment of the invention, the high-voltage power supply comprises a rectifier bridge, a first input capacitor, a second input capacitor, a filter capacitor, a transformer, a first switch MOS transistor, a second switch MOS switch, a first rectifier diode, a second rectifier diode, a filter inductor, and a high-voltage relay, wherein two input ends of the rectifier bridge are connected with 220V ac mains supply, a first output end of the rectifier bridge is connected with one end of the first input capacitor and one end of the first switch MOS switch, a second output end of the rectifier bridge is connected with one end of the second input capacitor and one end of the second switch MOS transistor, the other end of the first input capacitor and the other end of the second input capacitor are connected with a first input end of the transformer, the other end of the first switch MOS transistor and the other end of the second switch MOS transistor are connected with a second input end of the transformer, the first switch MOS transistor and the second switch MOS transistor are controlled by an application layer, the first output end of the transformer is connected with an anode of the first rectifier diode, the second output end of the transformer is connected with the anode of the second rectifier diode, the third output end of the transformer is connected with one end of the filter capacitor, the cathode of the first rectifier diode and the cathode of the second rectifier diode are connected to one end of the filter inductor, the other end of the filter inductor and the other end of the filter capacitor are connected to one end of the high-voltage relay, and the other end of the high-voltage relay and one end of the filter capacitor are used as the output end of the high-voltage power supply.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention has the characteristics of small occupied area, light weight and convenient movement, and is beneficial to the fault location of the sub-module in the converter station.
(2) The invention has high automation degree and positioning accuracy, realizes real-time fault display and accurate positioning, and has one-key automatic fault positioning operation and low fault rate.
(3) The invention has the advantages of high voltage isolation and low voltage for testing, less participation steps of testers, high safety and suitability for common testers.
Drawings
Fig. 1 is a layout diagram of the fault automatic positioning device of the high-voltage flexible-straight submodule of the invention.
Fig. 2 is a layout diagram of the main circuit of the high-voltage power supply of the invention.
Fig. 3 is a circuit layout diagram of the controller of the present invention.
FIG. 4 is a software main interface diagram of the apparatus of the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The invention provides a high-voltage flexible-straight submodule fault automatic positioning device which comprises an interface layer and an application layer, wherein the interface layer is used for connecting a high-voltage flexible-straight submodule;
the interface layer directly faces the sub-module, provides an energy source and a control instruction for the sub-module, simultaneously acquires external information of the sub-module, and transmits the external information to the application layer for processing and judgment; the interface layer comprises a high-voltage power supply, a controller, an oscilloscope and a high-voltage probe;
the high-voltage power supply is responsible for providing an energy supply power supply for the sub-module, the high-voltage power supply adopts single-phase mains supply to directly supply power, the application layer uses a program control technology to directly control the output voltage and current of the high-voltage power supply, the output of the high-voltage power supply adopts an adjustable circuit topological structure, the voltage and current output range is adjustable, and an output protection and locking module is configured to ensure the test power utilization safety; the output side of the high-voltage power supply also comprises a high-voltage relay for preventing electric energy from flowing backwards, and the high-voltage relay is automatically switched off after the high-voltage power supply does not output;
the controller is responsible for communicating with the sub-module, issuing a sub-module control instruction and receiving return information of the sub-module, and is connected by adopting optical fibers, so that partial functions of a sub-module control system can be simulated; the controller collects and preprocesses information, generates a monitoring state of the sub-module, and sends the monitoring state to the application layer, and the application layer uses a program control technology to communicate with the controller, so that control instructions of the controller and the tested sub-module are issued and the state of the sub-module is uploaded;
the oscilloscope and the high-voltage probe are used for isolating and converting the high-voltage signal output by the tested submodule into a low-voltage signal, analyzing the elements of the signal including amplitude and frequency, and then sending the signal to an application layer through a program control technology;
the application layer directly controls the interface layer and receives data from the interface layer, wherein the data of the interface layer comprises interface layer data and submodule data; and the application layer adopts an expert knowledge base to classify the sub-module faults, analyzes the characteristics of the faults, traverses the sub-module fault information, forms a knowledge base according to the data and the action time sequence thereof, and compares the sub-module state information with the contents of the knowledge base after receiving the sub-module state information to realize the automatic judgment of the sub-module faults.
The following is a specific implementation of the present invention.
The invention relates to a high-voltage flexible-straight submodule fault automatic positioning device, which realizes the miniaturization and light-weight of a submodule fault positioning device by analyzing and reasonably selecting test voltage, high-voltage power supply grade, a high-precision data acquisition sensor, a data conversion device and the like, simultaneously realizes the automatic control of a high-voltage power supply, a controller, an oscilloscope and the like by utilizing a remote control technology, realizes the isolation of high-voltage detection by using a high-voltage differential probe, ensures the safety of equipment, realizes the quick fault positioning of submodule faults by adopting an expert knowledge base, gives maintenance suggestions after detection in real time, and is realized on a database and a PC. The four devices are integrated in the standard cabinet, so that the integration and the intellectualization of the device are realized, and powerful help is provided for the quick fault location of the engineering field submodule. The invention mainly comprises an interface layer and an application layer.
(1) Interface layer
The interface layer equipment directly faces the sub-module, provides an energy source and a control instruction for the sub-module, collects external information of the sub-module and transmits the external information to the application layer for processing and judgment. The interface layer equipment is provided with a program control receiving and sending module, and realizes the receiving of the control instruction of the application layer and the uploading of the equipment state. The interface layer equipment comprises a high-voltage power supply, a controller, an oscilloscope and a high-voltage probe.
The high voltage power supply is responsible for providing energy supply power for the submodule piece, and this module adopts single-phase commercial power direct power supply, and the application layer uses programme-controlled technique, and the output voltage and the electric current of direct control energy supply module, what high voltage power supply's output adopted is adjustable circuit topology structure, and voltage and electric current output scope can be suitable for a plurality of engineerings, has configured output protection and locking module, ensures the test power consumption safety. The output side of the energy supply module is additionally provided with a high-voltage relay for preventing electric energy from flowing backwards, the relay is linked with the power output, the electric appliance is automatically disconnected after the power supply has no output, and the voltage tolerance of the high-voltage relay is at least 1.5 times of the output voltage of the energy supply module.
The controller is responsible for communicating with the sub-module, issues sub-module control instructions and receives return information of the sub-module, adopts optical fiber for connection, and simulates partial functions of a sub-module control system. The controller module collects and preprocesses information, generates monitoring states of the sub-modules and sends the monitoring states to the application layer, and the application layer uses a program control technology to communicate with the controller, so that control instructions of the controller and the tested sub-modules are issued and states of all units are uploaded.
The oscilloscope and the high-voltage probe realize the output electric signal monitoring of the tested submodule, and the output signal of the tested submodule is a high-voltage signal and can be fed back to the application layer only through isolation conversion. The high-voltage electric signal of the sub-module to be tested is converted into a low-voltage signal, the elements such as the amplitude, the frequency and the like of the signal are analyzed, and the converted data are transmitted to the application layer through a program control technology.
(2) Application layer
The application layer receives data from the interface layer, including interface layer device data and sub-module data, and directly controls the interface layer device. The application layer adopts an expert knowledge base to classify the sub-module faults, performs characteristic analysis on the faults, traverses the sub-module fault information, forms a knowledge base according to data and action time sequence thereof, and compares the sub-module state information with the contents of the knowledge base after receiving the sub-module state information to realize automatic judgment of the sub-module faults.
Fig. 1 is a layout diagram of the device of the present invention, and it can be seen that the device for automatically positioning the fault of the high-voltage flexible-straight submodule of the present invention comprises a high-voltage power supply, a high-voltage probe, a controller, an oscilloscope, an upper computer, a communication optical cable, a high-voltage cable, a submodule controller, a program control cable, a power-taking extension socket and a mains supply cable, wherein the upper computer is used as an application layer, and other devices are used as interface layers.
As shown in FIG. 2, the high voltage power supply of the present invention comprises a rectifier bridge, a first input capacitor, a second input capacitor, a filter capacitor, a transformer, a first switch MOS transistor, a second switch MOS transistor, a first rectifier diode, a second rectifier diode, a filter inductor, a high voltage relay, wherein two input terminals of the rectifier bridge are connected with 220V AC mains supply, a first output terminal of the rectifier bridge is connected with one end of the first input capacitor and one end of the first switch MOS transistor, a second output terminal of the rectifier bridge is connected with one end of the second input capacitor and one end of the second switch MOS transistor, the other end of the first input capacitor and the other end of the second input capacitor are connected with a first input terminal of the transformer, the other end of the first switch MOS transistor and the other end of the second switch MOS transistor are connected with a second input terminal of the transformer, the first switch MOS transistor and the second switch MOS transistor are controlled by an application layer, the first output terminal of the transformer is connected with an anode of the first rectifier diode, the second output end of the transformer is connected with the anode of the second rectifier diode, the third output end of the transformer is connected with one end of the filter capacitor, the cathode of the first rectifier diode and the cathode of the second rectifier diode are connected to one end of the filter inductor, the other end of the filter inductor and the other end of the filter capacitor are connected to one end of the high-voltage relay, and the other end of the high-voltage relay and one end of the filter capacitor are used as the output end of the high-voltage power supply.
The following are preferred embodiments for specific applications
Referring to the attached drawing 1, the high-voltage power supply 2, the controller 3, the high-voltage probe 4, the oscilloscope 5 and the upper computer 6 are integrated in a 600mm × 600mm × 1600mm cabinet and are interconnected through the program control cable 10. The bottom of the cabinet is provided with a storage box for storing wires, power lines, test specifications and the like; the high-voltage power supply 2 is arranged on a clamping groove on the storage box, and the size of the power supply is 2U standard case design and can be drawn out from the case; the high-voltage probe 4 and the oscilloscope 5 are arranged on a flat plate on a high-voltage power supply, the probe converts a high-voltage signal into a low-voltage signal and transmits the low-voltage signal to the oscilloscope, and the oscilloscope converts an analog signal into a digital signal and transmits the digital signal to the upper computer 6; the upper computer 6 is arranged on the uppermost layer of the cabinet and comprises a host and a display; the controller 3 and the upper computer 6 are in the same layer, and the controller 3 adopts an FPGA-ARM framework, receives a control instruction transmitted by the upper computer 6, packs the instruction and transmits the instruction to the tested sub-module controller 9. 2. 3, 4, 5 and 6 are all supplied with power through a mains cable and are all 220V single-phase power supplies; the high-voltage power supply 2 is connected with an upper computer through a program control cable 10, transmits a high-voltage power supply control instruction and outputs a return, the high-voltage power supply 2 is connected with a port of the sub-module to be tested through a high-voltage cable 8, and the output of the high-voltage power supply is continuously adjustable; the controller 3 is connected with an upper computer through a program control cable 10, the controller 3 is connected with a submodule controller 9 through an optical fiber 7, and the optical fiber transmits a 10MHz high-speed communication signal; the high-voltage probe 4 is connected with a port of a tested submodule through a high-voltage cable 8, the high-voltage probe 4 is connected with the oscilloscope through a program control cable 10, the oscilloscope is connected with the upper computer 6 through the program control cable 10, the oscilloscope transmits information such as amplitude, frequency and the like of a tested signal to the upper computer 6, and the upper computer 6 can control sampling frequency, channel resolution and the like of the oscilloscope.
Referring to fig. 2, the input capacitor 21, the input capacitor 22, the switching MOS tube 23, the switching MOS tube 24, the transformer 25, the rectifier diode 26, the rectifier diode 27, the filter inductor 28, the filter capacitor 29, the high-voltage relay 210, and the rectifier bridge 211 are packaged in a 520mm x 482mm x 88mm chassis, the 220V commercial power input is converted into direct current through the rectifier bridge 11, the direct current is converted into alternating current through the switching MOS tube 24 and the transformer 25, the amplitude of the alternating current is controlled through the switching MOS tube 24, the voltage output is continuously adjustable, the adjustable alternating current is converted into direct current through the rectifier diodes 26 and 27, and the direct current is converted into stable usable direct current through the filter inductor 28 and the filter capacitor 29 and is supplied to the sub-module for use.
Referring to fig. 3, the serial connection terminal 31, the serial line 32, the decoder/encoder 33, the high-speed bus 34, the interface unit 35, the optical transmitter 36, the optical receiver 37, the power terminal 38, and the power conversion unit 39 are integrated on a 230mm by 200mm circuit board, which is packaged by a shielding box to avoid high-voltage electromagnetic interference, and when fault location is performed, the controller sends control pulses through the interface unit 35, the electric pulses are converted into optical signals and transmitted to the sub-module, the optical pulses returned by the sub-module are converted into electric pulses through the optical receiver 37, the electric pulses are processed by the interface unit, the information is transmitted to the encoder/decoder 33 through a high-speed bus, the information is transmitted to the oscilloscope through the serial port line 32 and the serial port terminal 31 after being encoded, and the power conversion unit 39 converts the externally input power into a voltage usable by the encoder/decoder 33 and the interface unit 35.
Referring to fig. 4, a sequence detection item 41, a whole process monitoring item 42, real-time test information 43, product contents 44, and a one-key start fault location 45 are integrated on a software main interface, when fault location is performed, an engineering item is selected from the product contents 44, a sub-module number, tester information and the like are input, and the area is mainly used for selecting different engineering items and determining a communication protocol; then clicking a one-key start button 45 to wait for the device to automatically complete fault location detection; the real-time test information 43 is compared with the data of the knowledge base system in the background, and the found fault is directly displayed to the information table.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (2)
1. The automatic fault positioning device for the high-voltage flexible-straight submodule is characterized by comprising an interface layer and an application layer;
the interface layer directly faces the sub-module, provides an energy source and a control instruction for the sub-module, simultaneously acquires external information of the sub-module, and transmits the external information to the application layer for processing and judgment; the interface layer comprises a high-voltage power supply, a controller, an oscilloscope and a high-voltage probe;
the high-voltage power supply is responsible for providing an energy supply power supply for the sub-module, the high-voltage power supply adopts single-phase mains supply to directly supply power, the application layer uses a program control technology to directly control the output voltage and current of the high-voltage power supply, the output of the high-voltage power supply adopts an adjustable circuit topological structure, the voltage and current output range is adjustable, and an output protection and locking module is configured to ensure the test power utilization safety; the output side of the high-voltage power supply also comprises a high-voltage relay for preventing electric energy from flowing backwards, and the high-voltage relay is automatically switched off after the high-voltage power supply does not output;
the controller is responsible for communicating with the sub-module, issuing a sub-module control instruction and receiving return information of the sub-module, and is connected by adopting optical fibers, so that partial functions of a sub-module control system can be simulated; the controller collects and preprocesses information, generates a monitoring state of the sub-module, and sends the monitoring state to the application layer, and the application layer uses a program control technology to communicate with the controller, so that control instructions of the controller and the tested sub-module are issued and the state of the sub-module is uploaded;
the oscilloscope and the high-voltage probe are used for isolating and converting the high-voltage signal output by the tested submodule into a low-voltage signal, analyzing the elements of the signal including amplitude and frequency, and then sending the signal to an application layer through a program control technology;
the application layer directly controls the interface layer and receives data from the interface layer, wherein the data of the interface layer comprises interface layer data and submodule data; and the application layer adopts an expert knowledge base to classify the sub-module faults, analyzes the characteristics of the faults, traverses the sub-module fault information, forms a knowledge base according to the data and the action time sequence thereof, and compares the sub-module state information with the contents of the knowledge base after receiving the sub-module state information to realize the automatic judgment of the sub-module faults.
2. The automatic fault location device for the high-voltage flexible-direct submodule according to claim 1, wherein the high-voltage power supply comprises a rectifier bridge, a first input capacitor, a second input capacitor, a filter capacitor, a transformer, a first switch MOS transistor, a second switch MOS transistor, a first rectifier diode, a second rectifier diode, a filter inductor, a high-voltage relay, two input ends of the rectifier bridge are connected with 220V AC mains supply, a first output end of the rectifier bridge is connected with one end of the first input capacitor and one end of the first switch MOS transistor, a second output end of the rectifier bridge is connected with one end of the second input capacitor and one end of the second switch MOS transistor, the other end of the first input capacitor and the other end of the second input capacitor are connected with a first input end of the transformer, the other end of the first switch MOS transistor and the other end of the second switch MOS transistor are connected with a second input end of the transformer, the first switch MOS tube and the second switch MOS tube are controlled by an application layer, a first output end of the transformer is connected with an anode of the first rectifier diode, a second output end of the transformer is connected with an anode of the second rectifier diode, a third output end of the transformer is connected with one end of the filter capacitor, a cathode of the first rectifier diode and a cathode of the second rectifier diode are connected to one end of the filter inductor, the other end of the filter inductor and the other end of the filter capacitor are connected to one end of the high-voltage relay, and the other end of the high-voltage relay and one end of the filter capacitor are used as an output end of the high-voltage power supply.
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