CN107832183B - Service system-based acquisition and maintenance integrated training and checking device - Google Patents
Service system-based acquisition and maintenance integrated training and checking device Download PDFInfo
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Abstract
The invention discloses a service system-based acquisition and maintenance integrated training and checking device which comprises a simulation field platform area and a virtual platform area, wherein the simulation field platform area is communicated with the field platform area through a public network, a concentrator, a collector and an electric energy meter are installed in the simulation field platform area, the virtual platform area comprises a simulation main station, the simulation main station is connected with a plurality of concentrators through an upper-layer communication network, each concentrator is connected with the collector or a carrier electric energy meter through a bottom-layer communication network, and each collector is connected with an RS485 communication electric energy meter in a wired mode. The invention discloses a collection and maintenance integrated training and checking device which utilizes a soft and hard simulation fault simulation technology, sets various common faults on a concentrator, a collector, an ammeter or a communication link and the like through a simulation master station on a collection and maintenance integrated training platform, and carries out training and checking on maintenance items such as personnel troubleshooting of a collection and maintenance integrated team so as to train the judging and analyzing capacity of students on collection and reading faults and the removing capacity of collection and reading faults.
Description
Technical Field
The invention belongs to the field of electric power marketing and metering industries, relates to a simulation platform of a low-voltage centralized meter reading system, and particularly relates to a service system-based acquisition and maintenance integrated training and checking device.
Background
From the end of the last century, power systems in China have not developed rapidly before, and with the need of national economic development, the construction of smart grids is completely laid out by various grid companies, and an important construction link of the smart grids is the establishment of a power user electricity utilization information acquisition system. The power consumer electricity utilization information acquisition system is a system for acquiring, processing and monitoring electricity utilization information of a power consumer in real time.
The application system of the low-voltage electric energy metering centralized reading technology, namely the low-voltage centralized reading system, is an automatic technology closely linked with electric power marketing, has the functions of remotely and automatically reading and calculating residential electric meters in a public transformer area, and effectively improves the meter reading, charging and settlement efficiency of an electric power system by combining a bank withholding charging mode. The method provides an accurate, simple and convenient electricity charge collecting means for power supply enterprises and vast users. The accuracy and the real-time performance of the data are recorded, effective basis is provided for calculation of power consumption management, analysis, supervision, line loss and the like, and the power consumption management level of a power supply enterprise is improved.
The power line carrier centralized meter reading is realized by using the power line as a communication medium, and the optimal solution for completing automatic meter reading in the power industry is provided. As shown in fig. 1, the low-voltage meter reading system is a low-voltage meter reading system that is commonly used at present and comprises an electric energy meter, a collector, a concentrator and a master station system. The electric energy meter is used for metering the electricity consumption of users, the collector uploads the electric energy data of the electric energy meter to the concentrator in communication modes such as RS485 or PLC (power line carrier), and the concentrator uploads the electric energy data to the master station management system through the wireless public network.
The collector or the directly used carrier module arranged at the side of the user electric energy meter collects and stores the data of the electric energy meter, and carries out two-way communication with the collector or the concentrator, and the concentrator sends the electric energy data to the master station through the wireless public network.
Unlike carrier communication of medium and high voltage power lines, low voltage power distribution networks have an extremely harsh communication environment due to the inherent characteristic of directly facing users. If the load situation is complex, the noise interference is strong and has time-varying property, the signal attenuation is large, the channel capacity is small, etc. Therefore, the communication medium of the downlink communication part of the low-voltage centralized meter reading system is transmitted by a low-voltage power grid power line carrier signal through the low-voltage power grid, and carrier communication abnormality caused by the fact that individual transformer areas are interfered by the power grid, signal attenuation and the like inevitably occurs on site.
How collection and operation and maintenance personnel pass through technical training, the problem that exists in the more clear judgement scene can in time efficient handle common problem, is the problem of waiting to solve urgently.
The original centralized meter reading training platform can only simulate the existing centralized meter reading faults by setting physical connection breakpoints on hardware, and can only simulate simple centralized meter reading fault conditions such as 485 communication line disconnection, and other various types of centralized meter reading faults can only take effect by manually setting in advance. In order to meet the needs of the centralized-reading autonomous operation and maintenance station for learning, mastering the troubleshooting and the processing of the multiple-aspect centralized-reading operation and maintenance faults, an acquisition and maintenance integrated training and checking device based on a service system is urgently needed to be developed, various possible common faults of the centralized-reading, such as carrier interference, equipment parameter abnormity and the like, are simulated through background software, the knowledge mastering degree of the trainees is improved and deepened, the related trainees can be checked for skills through the training platform, and the checked personnel can find out the fault reason and the fault position through corresponding centralized-reading troubleshooting tools (such as a 485 detector, a palm machine, a reading controller and the like) under the condition of no obvious fault point, so that the requirement of daily acquisition and maintenance integrated work is met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a simulation training and testing device for background reading and control of each independent acquisition device and the whole low-voltage meter reading system in a collection and maintenance integrated system, simulating low-voltage meter reading faults possibly occurring on various fields, and training and testing fault positioning and fault processing capabilities of collection and maintenance integrated workers in a meter reading fault environment by various technical simulation means under the environment based on an actual service system.
The technical scheme adopted by the invention is as follows: the utility model provides a training of adopting dimension integration and examination device based on business system, including simulation scene platform district and with the virtual platform district that the scene platform district communicates through the public network, wherein, concentrator, collector and electric energy meter are installed to simulation scene platform district, virtual platform district is including simulating the main website, simulate the main website and pass through a plurality of concentrators of upper communication network connection, each the concentrator passes through bottom communication network connection collector or carrier wave electric energy meter, each the collector wired connection RS485 communication ammeter.
Further, the simulation master station comprises a front-end processor acquisition layer, a physical isolation layer, a computing service layer, a data processing layer and a business application layer, wherein,
the front-end processor acquisition layer is connected with the physical isolation layer and the acquisition equipment layer and comprises a front-end processor and a timing acquisition module, wherein the front-end processor is mainly responsible for managing a terminal channel and forwarding various requests including data call, parameter setting, parameter call and control commands between the terminal and other modules of the main station, and the timing acquisition module is responsible for acquiring original data at regular time;
the physical isolation layer is respectively connected with the front-end processor acquisition layer and the computing service layer, is responsible for separating the data acquisition layer from the application layer, and simultaneously provides a specific API (application programming interface) to enable a user to provide a software channel for data interaction of an internal network and an external network through a forward/reverse physical isolation device in a programming mode;
the computing service layer is responsible for counting, analyzing and calculating various collected data to provide data required by the application layer to display;
the data processing layer is respectively connected with the computing service layer and the business application layer and is responsible for counting, analyzing and calculating various collected data to provide data required by the application layer to display;
and the service application layer is responsible for providing an interactive interface for operating the system.
Further, the upper layer communication network comprises one or more of wireless broadband, GPRS communication, CDMA communication, optical fiber communication, serial communication, dial-up communication, short-distance communication and power line carrier communication.
Further, at least a carrier signal fault test unit is arranged on the bottom layer communication network, wherein the carrier signal fault test unit comprises a carrier signal weakening test unit and a carrier signal interference test unit.
Furthermore, the carrier signal weakening test unit comprises an electric energy metering unit, the electric energy metering unit is respectively connected with a plurality of branches through a single-pole multi-throw switch, each branch is respectively provided with an RLC circuit simulation long-distance transmission line, a large-impedance series simulation large-impedance circuit, a normal carrier generation circuit simulation normal operation circuit and a carrier signal loss simulation circuit without a carrier generation circuit, and each simulation circuit is connected to a bottom layer communication network.
Furthermore, the carrier signal interference test unit comprises a branch formed by sequentially connecting a plurality of soft switches in series, the branch is connected with each branch of the carrier signal attenuation test unit in parallel, and the plurality of soft switches are respectively connected with an interference signal generator in parallel.
Further, the interference signal generator obtains random pulse interference signals by programming the programmable logic array CPLD module or the field programmable logic array chip FPGA.
Further, the underlying communication network includes a cable signal transmission network.
Compared with the prior art, the service system-based acquisition and maintenance integrated training and assessment device provided by the invention achieves the following effects:
1. the mining and maintenance integrated training platform is used for simulating a field platform area, installing relevant concentrators, collectors, various electric meters and circuits, establishing a virtual platform area in the metering automatic system, and establishing a corresponding relation with the virtual platform area of the metering automatic system through public network communication, so that training and checking of items such as meter installation, background parameter setting, joint debugging and the like of mining and maintenance integrated team personnel can be performed, and training and checking of a new mining and maintenance integrated work category are realized.
2. And (3) setting various common faults on the acquisition and maintenance integrated training platform by using a soft and hard simulation fault simulation technology, and training and checking maintenance items such as acquisition and maintenance integrated team personnel troubleshooting. Therefore, the ability of students to judge and analyze the centralized reading fault and the ability to remove the centralized reading fault are developed, and the problem can be solved on site at one time during work.
3. The adoption and maintenance integrated training platform is used for carrying out compatibility testing, related testing results can be recorded through background setting and monitoring, omission and negligence in the manual testing process are avoided, authenticity of testing data is guaranteed, and query and tracing of the testing results are achieved. Through the use of the compatibility test function, the compatibility of each manufacturer and each period of meter reading equipment is clarified, and spare parts compatible with the field running meter reading equipment are prepared before field fault processing is carried out, so that working energy is prevented from being wasted due to running back and forth.
4. By arranging the EFT generator and/or the anti-surge generator on the front-end processor, electromagnetic interference can be simulated, and the performance of the collector can be tested.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage meter reading system commonly used in the prior art.
FIG. 2 is a schematic overall structure diagram of the training and assessment device for the mining and maintenance integration.
FIG. 3 is a system service diagram of a simulation master station and a simulation platform area of the mining and maintenance integrated training and assessment device.
Fig. 4 is a circuit configuration diagram of a carrier signal reduction test unit according to an embodiment of the present invention.
Fig. 5 is a circuit diagram of a carrier signal interference test unit according to an embodiment of the invention.
Fig. 6 is a circuit configuration diagram of an EFT generator in one embodiment of the invention.
Fig. 7 is a circuit configuration diagram of an anti-surge generator in one embodiment of the present invention.
Fig. 8 is a circuit configuration diagram of the high voltage dc power supply in one embodiment of the invention.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby. As certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. The description which follows is a preferred embodiment of the present invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
The invention is described in further detail below with reference to the figures and specific embodiments.
Referring to the attached figure 2, the service system-based acquisition and maintenance integrated training and checking device disclosed by the invention is mainly used for simulating and installing relevant concentrators, collectors, various electric meters and circuits, establishing a virtual platform area in a metering automation system, establishing a corresponding relation with the virtual platform area of the metering automation system through public network communication, training and checking items such as table installation, background parameter setting, joint debugging and the like of acquisition and maintenance integrated team personnel, and finally realizing the training and checking of a new acquisition and maintenance integrated work. The acquisition and maintenance integrated training and checking device utilizes a soft and hard simulation fault simulation technology, various common faults are set on a concentrator, a collector, an ammeter or a communication link and the like through a simulation master station in an acquisition and maintenance integrated training platform, training and checking of maintenance items such as acquisition and maintenance integrated team personnel troubleshooting and the like are performed, the capacity of students for judging and analyzing the collection and recording faults and the capacity of removing the collection and recording faults are cultured, and therefore the problem can be solved on site at one time in work.
Specifically, as shown in fig. 2, the acquisition and maintenance integrated training and examination device comprises a simulation field area and a virtual area communicated with the field area through a public network, wherein a server is accessed to the Internet in a public network mode, such as ADSL (asymmetric digital subscriber line) dialing broadband Internet access, applies for a fixed IP address of the public network, and acquires the contact with the virtual area, a concentrator, a collector and an electric energy meter are installed in the simulation field area, the virtual area comprises a simulation master station, the simulation master station is connected with a plurality of concentrators through an upper communication network, each concentrator is connected with the collector or a carrier electric energy meter through a bottom communication network, and each collector is connected with an RS485 communication electric energy meter in a wired mode. The upper layer communication network can be in communication modes such as broadband wireless, GPRS, short-distance wireless or power line carrier, and the lower layer communication network can be in communication modes such as broadband wireless, GPRS, short-distance wireless or power line carrier
The simulation platform area is formed by electrically connecting a plurality of concentrators, a plurality of collectors and a plurality of electric energy meters, the electric energy meters comprise a common RS485 communication electric meter and a carrier electric meter, and the master station platform is used for reading the information of the recorded values (window values) of the electric energy of the plurality of electric energy meters in a centralized manner through communication channels (wireless, wired, power line carrier and other channels). The concentrator collects the data of each collector or electric energy meter, processes and stores the data, and can exchange data with the master station or the handheld device. The collector is used for collecting the electric energy information of a plurality of or a single electric energy meter and can exchange data with the concentrator. Another main function of the simulation platform is to revise and debug the parameters of the concentrator and the collector. When the electric meter is a common electric meter with an RS485 communication line, the common electric meter is connected with the concentrator through the collector; when the ammeter is a carrier ammeter, the carrier ammeter is directly connected with the concentrator, and the concentrator directly performs data interaction with the simulation master station. The simulation master station belongs to an information acquisition and control center of the whole metering automation system, acquires and controls the information of the metering automation terminal through a remote communication channel or a lower unit system interface, and analyzes and comprehensively processes the information.
The system is divided from a system architecture, and the whole system can be divided into an acquisition equipment layer, a communication channel layer, a front-end processor acquisition layer, a physical isolation layer, a computing service layer and an application layer. The master station system comprises all links except the acquisition object layer. The acquisition equipment layer is a simulated field platform area.
The acquisition equipment layer is the information bottom layer of the metering automation system and is responsible for collecting and providing the original electricity utilization information of the whole system. The layer can be divided into a terminal sublayer and a metering device sublayer, wherein the terminal sublayer collects information of user metering devices, processes and freezes related data, and realizes interaction with an upper-layer master station; the metering equipment layer realizes the functions of electricity metering and the like.
The communication channel layer is responsible for providing channels for various acquisition devices to access the metering automation system, is a link between the main station and the acquisition devices, provides various available wired and wireless communication channels, provides a link foundation for information interaction between the main station and the terminal, and supports various channels such as a GPRS/CDMA wireless channel, an optical fiber network, a serial port, telephone dialing and the like.
The front-end processor acquisition layer comprises a front-end processor and a timing acquisition module, wherein the front-end processor is mainly responsible for managing a terminal channel and forwarding various requests including data call, parameter setting, parameter call, control commands and the like between the terminal and other modules of the main station; the timing acquisition module is responsible for acquiring original data at regular time.
The physical isolation layer is responsible for separating the data acquisition layer from the application layer, and simultaneously provides a specific API (application programming interface) so that a user can provide a software channel for data interaction of an internal network and an external network through a forward/reverse physical isolation device in a programming mode.
The computing service layer is responsible for counting, analyzing and calculating various collected data to provide data required by the application layer to display.
The data processing layer is responsible for warehousing various acquired and calculated data and providing required data such as interfaces and the like for other systems.
The service application layer is responsible for providing an interactive interface for operating the system, and is convenient for the user to carry out daily work.
The acquisition equipment layer is provided with a plurality of concentrators, collectors and electric energy meters for analog measurement and examination. For example, 1) electric meter parameter setting training and assessment: the following parameter items are set for the electric energy meter through a service system master station: asset coding (electric energy meter self-parameter), operation type (valid/invalid), meter address (electric energy meter self-parameter), communication mode (analog quantity/485 meter), 485 port (carrier channel/port 1), electric meter type (single-phase electronic meter/multifunctional meter), measurement point communication protocol (97 protocol/07 protocol) and baud rate (1200/2400). 2) Training and checking the collector parameter setting: collector address (collector own parameters). 3) Training and checking the parameter setting of the concentrator: terminal address (concentrator self-parameter), terminal asset number (concentrator self-parameter), protocol name (concentrator self-parameter). 4) Joint debugging of a newly added meter: and adding a low-voltage user in a corresponding concentrator, inputting related information (a house name, a house number, a meter asset number, a meter address and the like), issuing a file, and calling for testing and checking. The method comprises the following steps: a) installation of type ii concentrator mode (master station + type ii concentrator + RS485 electric energy meter): adding a II-type concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, issuing a file after confirmation, and calling for testing and checking; b) installation of full narrowband carrier mode (master station + concentrator + carrier electric energy meter): adding a concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, sending a file after confirmation, and calling, testing and checking; c) installation of semi-narrowband carrier mode (master station + concentrator + collector + RS485 electric energy meter): adding a concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, sending a file after confirmation, and calling, testing and checking; d) installation of small wireless (micropower) mode (master station + concentrator + collector + RS485 electric energy meter): adding a concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, sending a file after confirmation, and calling, testing and checking; e) installation of full broadband carrier mode (master station + concentrator + carrier electric energy meter): adding a concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, sending a file after confirmation, and calling, testing and checking; f) installation of half-broadband carrier mode (master station + concentrator + collector + RS485 electric energy meter): and adding a concentrator in a corresponding station area, transferring relevant low-voltage users to the concentrator after inputting relevant information, sending a file after confirmation, and calling, testing and checking.
Referring to fig. 2 and 3 again, according to the system architecture of fig. 2 and 3, an automatic analog electric energy metering system is built, which is composed of electronic electric energy meters (including induction electric energy meters) of various models, collectors (electric energy metering terminals) and concentrators, communication links are built between the analog master station and each electric energy data acquisition unit according to DLT-645 communication protocol (including 97 protocol/07 protocol) protocol requirements (as in fig. 2), and each unit is set according to an actual operation mode, so that asset coding (electric energy meter self-parameters), operation types (valid/invalid), meter addresses (electric energy meter self-parameters), communication modes (analog quantity/meter 485), 485 ports (carrier channel/port 1), meter types (single-phase electronic meter/multifunctional meter) and the like of each electric energy metering unit specified in design requirements can be realized, A measurement point communication protocol (97 protocol/07 protocol), a baud rate (1200/2400); collector address (collector self parameter) collector parameter setting; and each data communication unit: the concentrator parameters set the requirements of the simulation training and examination functions of the terminal address (the self parameters of the concentrator), the terminal asset number (the self parameters of the concentrator) and the protocol name (the self parameters of the concentrator).
The training and checking device based on the business system acquisition and maintenance integration can also realize the simulation training and checking of common faults.
The electric energy metering device can encounter various faults and interferences in the actual working process, and according to the design concept of the training device, the following embodiments are designed:
a) carrier signal fade (long distance line, large impedance analog) or carrier signal loss: this type of fault consideration is designed to be addressed by way of multi-way switch control.
As shown with reference to fig. 4. The switch K is a multi-way switch, a single-pole multi-throw mode is adopted, and the signal transmission mode of the path can be set to be a long-distance line (branch 1 realized through an RLC circuit), large impedance simulation (branch 2 realized through a plurality of series impedances), normal operation work (branch 3 realized through a normal carrier generation circuit) and work mode simulation training of a carrier signal loss (branch 4 without a carrier generation circuit) circuit through software control of the switch K.
b) Carrier signal interference: generally speaking, if the medium adopted by the data communication system is an optical fiber, the interference problem of external signals does not exist; if the cable is a signal transmission medium, it is possible that a high-frequency impact electromagnetic field is generated in the start-stop process due to different types of loads, and a high-frequency signal is connected in the cable due to electromagnetic coupling, so that the waveform of a transmission signal is distorted (although the occurrence probability is small), and for the analog simulation of the interference signal, the analog simulation can be realized by a hardware method, that is: in the circuit shown in fig. 4, a branch (branch 5) is additionally added, which generates a random burst signal. In fig. 5, each switch is connected in parallel with a disturbing signal generator, and a plurality of switches are connected in series.
The random signal can be realized by a single-frequency signal generating circuit in a mode of randomly selecting different frequencies to combine and superpose in a soft switch control mode (as shown in fig. 4), or can be obtained by a programmable logic array (CPLD) module or a field programmable logic array (FPGA) chip through programming a device.
If the interference of the impact load on the electric energy metering unit is to be simulated, a strong electromagnetic field generating circuit can be arranged near the unit to be simulated, and the influence condition of the external interference on the communication of the electric energy metering device is simulated through switch control.
c) Simulation of communication line (485 line) fault phenomenon: in the simulation of the fault, a single 485 communication interface meeting the communication requirement of the DLT-645 protocol is designed, and the 485 communication interface is used as an analog electric energy metering unit to be connected into the electric energy metering automation system shown in the figure 2 and is in contact with the analog master station according to the figure 2 so as to complete the fault simulation.
In the design of the 485 communication interface, the simulation of fault phenomena such as 485 line disconnection, reverse connection and the like is realized by using a soft switching technology, namely: the function of disconnection and reverse connection of the output signal line is completed at the outlet end of 485 by a switch control method.
d) Simulation of the fault phenomenon of the concentrator: the content of the part is considered to adopt the scheme provided by the Shantou power supply bureau, namely: by means of the method that written background software utilizes the RS232 communication port to change and set parameters of the concentrator, analog simulation of various possible faults such as concentrator time scale abnormity, concentrator program faults and parameter faults is achieved.
In the embodiment of the invention, through various technical simulation means, background reading and control are carried out on each independent acquisition device and the whole low-voltage meter reading system in the acquisition and maintenance integrated system, low-voltage meter reading faults possibly occurring on various fields are simulated, the simulation training and testing of fault positioning and fault processing capacity of training and testing acquisition and maintenance integrated workers in meter reading fault environments can be basically met, and the method has higher practicability.
As a preferred mode of the present invention, referring to fig. 6, an EFT generator is further disposed on a front-end processor acquisition layer of the analog master station, wherein the EFT generator includes a high voltage dc power supply U, a pulse capacitor Cs, a main circuit switch K, a pulse forming resistor Rs, and impedance matching networks Rm and Cd, an anode of the high voltage dc power supply U is connected to one end of the pulse capacitor Cs and one end of the main circuit switch K through a load resistor R, a cathode of the power supply U is connected to the other end of the main circuit switch K, the other end of the main circuit switch K is connected to the pulse forming resistor and the impedance matching networks Rm and Cd, and the impedance matching networks are connected to the front-end processors. The circuit structure of the high-voltage direct-current power supply U is shown in fig. 8, and the working principle of the high-voltage direct-current power supply U is that alternating current is converted into direct current through a rectifier bridge. Then, half-bridge power conversion is carried out, and the direct current is chopped into alternating-current high-frequency square waves. Finally, the required direct current high voltage is obtained through the voltage doubling rectifying circuit. The main circuit switch can adopt a ZQM1-130/10 type hydrogen thyratron as the main circuit switch, and the hydrogen thyratron is a hot cathode low-pressure gas discharge device and has the advantages of small tube voltage drop during conduction, short ionization time and deionization time, small volume, small mass, stable work, long service life and the like. The hydrogen thyratron consists of an anode, a cathode, a grid, a filament and a hydrogen generator. The output signal of the EFT generator has the repetition frequency of 5 kHz, the pulse group duration of 15ms and the period of 300ms, and the rise time and the duration of the pulse are 5ns and 50ns respectively on a 50-ohm matched load. The volume is small, the heating value is small, and the efficiency is high.
Referring to fig. 7, as another preferred embodiment of the present invention, an anti-surge generator is further disposed on the front-end processor acquisition layer of the analog master station, and includes a high voltage dc power supply U, a pulse capacitor C, a main circuit switch K, and a pulse forming network formed by a plurality of resistors, wherein a positive electrode of the high voltage dc power supply is connected to one end of the pulse capacitor and one end of the main circuit switch through a load resistor, respectively, the pulse forming network is formed by a first resistor R2 and a branch formed by a second resistor R3, an inductor L, and a third resistor R4 connected in series in sequence, and the first resistor and the branch are connected in parallel. The surge generator outputs an open circuit voltage wave with a rise time of 1.2us, a duration of 50us, a short circuit current wave with a rise time of 8us, and a duration of 20 us.
According to the invention, the EFT generator and/or the anti-surge generator are/is externally connected or arranged in the front-end device, so that sounding high-frequency or low-frequency signals can be simulated, electromagnetic interference can be simulated, and the performance of the collector can be tested.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereby, and the present invention may be modified in materials and structures, or replaced with technical equivalents, in the constructions of the above-mentioned various components. Therefore, structural equivalents made by using the description and drawings of the present invention or by directly or indirectly applying to other related arts are also encompassed within the scope of the present invention.
Claims (5)
1. A training and checking device based on service system acquisition and maintenance integration comprises a simulation field platform area and a virtual platform area which is communicated with the field platform area through a public network, and is characterized in that the simulation field platform area is provided with a concentrator, a collector and an electric energy meter, the virtual platform area comprises a simulation main station, the simulation main station is connected with a plurality of concentrators through an upper-layer communication network, each concentrator is connected with the collector or a carrier electric energy meter through a bottom-layer communication network, and each collector is in wired connection with an RS485 communication electric energy meter;
at least a carrier signal fault test unit is arranged on the bottom layer communication network, wherein the carrier signal fault test unit comprises a carrier signal weakening test unit and a carrier signal interference test unit;
the carrier signal weakening test unit comprises an electric energy metering unit, the electric energy metering unit is respectively connected with a plurality of branches through a single-pole multi-throw switch, each branch is respectively provided with an RLC circuit simulation long-distance transmission line, a large-impedance series simulation large-impedance circuit, a normal carrier generation circuit simulation normal operation circuit and a carrier signal loss simulation circuit without a carrier generation circuit, and each simulation circuit is connected to a bottom layer communication network;
the carrier signal interference test unit comprises a branch formed by sequentially connecting a plurality of soft switches in series, the branch is connected with each branch of the carrier signal attenuation test unit in parallel, and the soft switches are respectively connected with an interference signal generator in parallel; the interference signal generator obtains random pulse interference signals by programming the programmable logic array CPLD module or the field programmable logic array chip FPGA.
2. The training and examining device integrated with harvesting and maintenance of claim 1, wherein the simulation master station comprises a front-end processor collection layer, a physical isolation layer, a calculation service layer, a data processing layer and a business application layer, wherein,
the front-end processor acquisition layer is connected with the physical isolation layer and the acquisition equipment layer and comprises a front-end processor and a timing acquisition module, wherein the front-end processor is mainly responsible for managing a terminal channel and forwarding various requests including data call, parameter setting, parameter call and control commands between the terminal and other modules of the main station, and the timing acquisition module is responsible for acquiring original data at regular time;
the physical isolation layer is respectively connected with the front-end processor acquisition layer and the computing service layer, is responsible for separating the data acquisition layer from the application layer, and simultaneously provides a specific API (application programming interface) to enable a user to provide a software channel for data interaction of an internal network and an external network through a forward/reverse physical isolation device in a programming mode;
the computing service layer is responsible for counting, analyzing and calculating various collected data to provide data required by the application layer to display;
the data processing layer is respectively connected with the computing service layer and the business application layer and is responsible for counting, analyzing and calculating various collected data to provide data required by the application layer to display;
and the service application layer is responsible for providing an interactive interface for operating the simulation master station.
3. The training and examining device for the harvesting and maintenance integration according to claim 1, wherein the upper layer communication network comprises one or more of wireless broadband, GPRS communication, CDMA communication, optical fiber communication, serial communication, dial-up communication, short-distance communication and power carrier communication.
4. An integrated training and examining device for harvesting and maintaining as claimed in claim 2, wherein an EFT generator is further provided on the front-end processor collection layer of the analog master station, wherein the EFT generator comprises a high voltage dc power supply, a pulse capacitor, a main circuit switch, a pulse forming resistor and an impedance matching network, the positive pole of the high voltage dc power supply is connected to one end of the pulse capacitor and one end of the main circuit switch through a load resistor, the other end of the pulse capacitor is connected to the negative pole of the power supply, the other end of the main circuit switch is connected to the pulse forming resistor and the impedance matching network, and the impedance matching network is connected to each front-end processor.
5. An acquisition and maintenance integrated training and assessment device according to claim 4, wherein an anti-surge generator is further arranged on a front-end processor acquisition layer of the simulation master station, the anti-surge generator comprises a high-voltage direct-current power supply, a pulse capacitor, a pulse forming network formed by a main circuit switch and a plurality of resistors, wherein the positive electrode of the high-voltage direct-current power supply is connected with one end of the pulse capacitor and one end of the main circuit switch through a load resistor respectively, the pulse forming network is formed by a first resistor and a branch formed by a second resistor, an inductor and a third resistor which are sequentially connected in series, and the first resistor and the branch are connected in parallel.
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| CN110266513B (en) * | 2019-05-09 | 2022-02-22 | 贵州电网有限责任公司 | Method for analyzing physical topology of low-voltage meter reading system |
| CN110310538B (en) * | 2019-06-28 | 2022-04-08 | 广西电网有限责任公司桂林供电局 | Power supply comprehensive practical training platform |
| CN112396904A (en) * | 2020-10-21 | 2021-02-23 | 河南能创电子科技有限公司 | Closed-loop management system for collecting operation and maintenance professional skills |
| CN113014449B (en) * | 2021-02-23 | 2022-07-01 | 重庆邮电大学 | Local communication protocol pressure testing method and system of electricity consumption information acquisition system |
| CN113539002B (en) * | 2021-07-27 | 2023-05-05 | 广东电网有限责任公司 | Power low-voltage centralized meter reading cross-platform area operation and maintenance simulation device and method |
| CN115695152A (en) * | 2022-12-30 | 2023-02-03 | 广东信通通信有限公司 | Method for analyzing carrier distribution area fault full link reason |
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