CN108233989B - Smart power grid power broadband carrier communication detection system and detection method thereof - Google Patents
Smart power grid power broadband carrier communication detection system and detection method thereof Download PDFInfo
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- CN108233989B CN108233989B CN201810005691.2A CN201810005691A CN108233989B CN 108233989 B CN108233989 B CN 108233989B CN 201810005691 A CN201810005691 A CN 201810005691A CN 108233989 B CN108233989 B CN 108233989B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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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
- H02J13/00007—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 the power network as support for the transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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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
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
Abstract
The invention discloses a smart grid power broadband carrier communication detection system and a detection method thereof, wherein the detection system comprises: the multi-node carrier communication link unit is formed by connecting and combining at least fifteen sub-node carrier communication interfaces through a signal matrix. The invention realizes the accurate measurement of the carrier signal by the fixed path loss, the conductive isolation air shielding of the shielding box and the point-by-point compensation of software in the power broadband carrier communication detection of the smart grid. The multi-node carrier communication link unit has a large attenuation adjusting range, supports adjustable 0-127dB, supports more carrier nodes, maximally supports 1800 node access, and supports multi-network coexistence and coordination.
Description
Technical Field
The invention relates to the technical field of smart grid power broadband carrier communication testing, in particular to a smart grid power broadband carrier communication detection system and a detection method thereof.
Background
At present, in a smart grid power broadband carrier communication test, the communication performance test does not shield each carrier communication unit, so that aerial radiation signals cannot be avoided, the measurement range and the precision are limited, and the transceiving performance of broadband carrier equipment cannot be accurately evaluated. The power line isolation unit directly passes through power frequency and carrier signals, and as the shielding effectiveness of the power line interface is limited, the carrier communication signals can be subjected to port crosstalk, and high-precision measurement and evaluation cannot be realized. The mode of directly adopting a non-power line RF coaxial cable does not consider zero-crossing detection and synchronization, can test the transceiving performance, but is not in accordance with the actual use environment and has no actual reference value. The power frequency and carrier wave mixing is used for adjusting signals of the power line attenuator, coupling sampling is performed twice in the attenuator, insertion loss is large, excessive path loss is introduced, and the attenuation adjustable range is small. The power line power frequency signal and the carrier signal share a power supply, the load increases the current, the size of a filter circuit of the attenuator is correspondingly increased, the current skin effect influences the transmission of the carrier signal to cause the distortion of a transmission channel, the channel transmission model is not controllable, the transmission attenuation model and the phase change of each frequency band channel are different, and the evaluation of the quality and the communication rate of the broadband carrier signal is influenced. The physical connection of each carrier node is consistent with that of a power supply circuit, the routing relay is fixed and unadjustable, and the switching phase and the relay cannot be realized. The communication link is bound with the power supply line, the large-scale node multi-network coordination current is large, the filter size is large, the realization is difficult, and the laboratory detection condition is not provided. The attenuators of all nodes of the communication networking are dispersedly controlled, so that the installation and debugging are inconvenient, the communication response rate is slow, the local regulation and control cannot be realized, the remote control can only be realized, and the whole control system is crashed and fails due to the abnormal TCP and UDP.
Disclosure of Invention
The invention aims to provide a smart grid power broadband carrier communication detection system and a detection method thereof, which are used for solving the problems that the existing smart grid power broadband carrier communication test does not shield each carrier communication unit and cannot avoid the influence of aerial radiation signals on the measurement range and precision.
In order to achieve the above object, the present invention provides a smart grid power broadband carrier communication detection system, including: the multi-node carrier communication link unit is formed by connecting and combining at least fifteen sub-node carrier communication interfaces through a signal matrix, each sub-node shielding box is internally provided with a sub-node carrier signal coupling and sampling unit for sending sub-node carrier signals to the sub-node carrier communication interfaces, the main node of the main node carrier communication interface, the sub-node carrier communication interface and the signal matrix is connected to a signal analyzer, a signal source and a carrier transparent transceiver device through a switch matrix, and the carrier transparent transceiver device is arranged in a main node shielding box or a sub-node shielding box.
Further, the main node carrier communication interface and/or the sub-node carrier communication interface, the signal analyzer, the signal source and the carrier transparent transceiving equipment are connected through a switch matrix to form a communication performance testing subsystem.
Further, the main node carrier communication interface and/or the sub-node carrier communication interface and the carrier transparent transceiving equipment are connected through a switch matrix to form a communication protocol consistency test subsystem.
Further, the multi-node carrier communication link unit and the carrier transparent transceiving equipment are connected through a switch matrix and a signal matrix to form an interoperability testing subsystem.
Furthermore, the switch matrix comprises a power divider, two attenuators, a signal source switch and a plurality of connecting circuits, wherein a main node carrier communication interface, a sub-node carrier communication interface and a main node of the signal matrix are respectively connected to the power divider through the connecting circuits, the power divider is respectively connected to a signal analyzer, a signal source and a carrier transparent transceiver device through the connecting circuits, the attenuators are respectively arranged on the connecting circuits between the main node carrier communication interface and the power divider and between the sub-node carrier communication interface and the power divider, and the signal source switch is arranged on the connecting circuit between the signal source and the power divider.
Further, the at least fifteen sub-node carrier communication interfaces are composed of a main node carrier communication interface and a sub-node carrier communication interface.
Further, the at least fifteen sub-node carrier communication interfaces are all sub-node carrier communication interfaces.
Furthermore, the multi-node carrier communication link unit is formed by sequentially connecting at least fifteen attenuators and at least fourteen power dividers at intervals through connecting lines to form a signal matrix with at least fifteen levels of nodes and at least fifteen levels of relay branch attenuations, the front end and the rear end of the signal matrix are both attenuators, the front end attenuator of the signal matrix is externally connected to form a main node of the signal matrix, the rear end attenuator of the signal matrix externally forms the last level of branch nodes of the signal matrix, and each power divider externally forms a level of branch nodes of the signal matrix.
Furthermore, the main node carrier signal coupling sampling unit, the sub-node carrier signal coupling sampling unit and the sub-node carrier signal coupling sampling unit all comprise a test bottom plate, a coupling sampling circuit, a power line filtering and shielding circuit and an RF radio frequency transceiver, wherein the test bottom plate is plugged with a device to be tested, the RF radio frequency transceiver is connected to the main node carrier communication interface, the sub-node carrier communication interface or the sub-node carrier communication interface, the device to be tested uses a 220V power frequency carrier and is connected with an external 220V switching power supply through an LN power line for power supply, the LN power line of the device to be tested has no load current, the LN power line is connected with the power line filtering and shielding circuit to isolate conducted and aerial radiation signals on an external carrier power line, the RF radio frequency transceiver samples 2-30MHz carrier signals through an inductive filter on the coupling sampling circuit and converts the impedance of the LN power line into a standard 50 ohm impedance, the RF radio frequency transceiver converts the collected power line carrier signals into RF radio frequency signals and sends the RF radio frequency signals to a main node carrier communication interface or a sub-node carrier communication interface.
The invention also discloses a detection method of the smart grid power broadband carrier communication detection system, which comprises the following steps: the communication performance test is carried out to the equipment to be tested in the main node shielding box and/or the sub-node shielding box, and the method comprises the following steps: the signal source switch is closed, and the main node carrier communication interface and/or the sub-node carrier communication interface, the signal analyzer, the signal source and the carrier transparent transceiver device are connected through the switch matrix to form a communication performance testing subsystem; the software testing service platform sets a device to be tested to enter an application layer message transparent transmission serial port mode; the carrier wave transparent transceiving equipment continuously sends data messages appointed by a software testing service platform, wherein the sending times and sending frame intervals of the data messages are appointed by the software testing service platform; the software testing service platform counts the success rate of the one-way communication; the software testing service platform sets the equipment to be tested to enter a carrier automatic return testing mode; the data received by the carrier transparent transceiver device is reported to a software test service platform; the software testing service platform counts the success rate of the two-way communication; the method for testing the consistency of the communication protocol of the equipment to be tested in the main node shielding box and/or the sub-node shielding box comprises the following steps: the signal source switch is turned on, and the main node carrier communication interface and/or the sub-node carrier communication interface and the carrier transparent transceiving equipment are connected through the switch matrix to form a communication protocol consistency test subsystem; the carrier transparent transceiver simultaneously starts a carrier transparent transceiving function and a carrier channel monitoring function; the data organized by the software testing service platform is sent to a carrier communication medium of the equipment to be tested through a carrier transparent transceiving function, and a confirmation frame is automatically replied or not according to the requirement; all data on a communication channel of the equipment to be tested are sent to a software testing service platform in real time through a carrier channel monitoring function for analysis and judgment; and carrying out interoperability test on the equipment to be tested in the plurality of sub-node shielding boxes, wherein the interoperability test comprises the following steps: the signal source switch is turned on, and the multi-node carrier communication link unit and the carrier transparent transceiving equipment are connected through the switch matrix to form an interoperability test subsystem; the device to be tested is respectively plugged into a test bottom plate in the sub-node shielding boxes, a plurality of RF (radio frequency) transceivers correspondingly connected with the device to be tested are respectively and correspondingly plugged into a plurality of sub-node carrier communication interfaces, and the sub-node carrier communication interfaces are networked through a signal matrix; the signal matrix main node sends the obtained addresses of the carrier communication interfaces of the sub-nodes to the software testing service platform through the carrier transparent transceiver; the carrier transparent transceiver starts a carrier channel interception function and sends data intercepted on a signal matrix main node channel to a software test service platform for analysis and judgment; respectively arranging carrier transparent transceiver equipment at each sub-node carrier communication interface to start a carrier channel sensing function, and sending sensed data on a single sub-node carrier communication interface channel to a software test service platform for analysis and judgment; and the carrier transparent transceiving equipment arranged on each sub-node carrier communication interface is placed in the corresponding sub-node shielding box and is connected with the software testing service platform through a network cable.
The invention has the following advantages:
the invention realizes the accurate measurement of the carrier signal by the fixed path loss, the conductive isolation air shielding of the shielding box and the point-by-point compensation of software in the power broadband carrier communication detection of the smart grid. The transmission channel is stable and controllable, and supports the regulation and control of a channel transmission model. The network topology structure is adjustable, and the star topology, the tree topology and the mixed mode are supported. The multi-node carrier communication link unit has a large attenuation adjusting range, supports adjustable 0-127dB, supports more carrier nodes, maximally supports 1800 node access, and supports multi-network coexistence and coordination. And zero-crossing detection, phase identification and station area identification carrier communication expansion functions are supported.
Drawings
Fig. 1 is a block diagram of a smart grid power broadband carrier communication detection system according to the present invention.
Fig. 2 is a schematic diagram of a switch matrix of the smart grid power broadband carrier communication detection system according to the present invention.
Fig. 3 is a circuit diagram of a coupling sampling circuit of the smart grid power broadband carrier communication detection system for converting a power line signal into an RF radio frequency signal.
Fig. 4 is a power line filtering and shielding circuit diagram of the smart grid power broadband carrier communication detection system according to the present invention.
Fig. 5 is a schematic diagram illustrating a signal matrix principle of a smart grid power broadband carrier communication detection system according to the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the smart grid power broadband carrier communication detection system disclosed in this embodiment includes: a main node carrier communication interface 01, a sub-node carrier communication interface 02, a multi-node carrier communication link unit 03, a main node shielding box 04, a sub-node shielding box 05, first to fifteenth sub-node shielding boxes 06-20, a signal analyzer 21, a signal source 22, a carrier transparent transceiving device 23, a switch matrix 24 and a signal matrix 25, wherein the main node shielding box 04 is internally provided with a main node carrier signal coupling sampling unit 26 for transmitting a main node carrier signal to the main node carrier communication interface 01, the sub-node shielding box 05 is internally provided with a sub-node carrier signal coupling sampling unit 27 for transmitting a sub-node carrier signal to the sub-node carrier communication interface 02, the multi-node carrier communication link unit 03 is formed by connecting and combining the first to fifteenth sub-node carrier communication interfaces 28-42 through the signal matrix 25, each sub-node shielding box is internally provided with a sub-node carrier signal coupling sampling unit for transmitting sub-node carrier signals to the sub-node carrier communication interfaces, the main node of the main node carrier communication interface 01, the sub-node carrier communication interface 02 and the signal matrix 25 is connected to the signal analyzer 21, the signal source 22 and the transparent carrier transceiver 23 through the switch matrix 24, the transparent carrier transceiver 23 is disposed in the sub-node shielding box 05, and the transparent carrier transceiver 23 may also be disposed in the main node shielding box 04.
Further, the fifteen sub-node carrier communication interfaces 28 to 42 in this embodiment are composed of a main node carrier communication interface and a sub-node carrier communication interface, or the fifteen sub-node carrier communication interfaces 28 to 42 are all sub-node carrier communication interfaces.
In this embodiment, a smart grid power broadband carrier communication detection system forms three subsystems: the system comprises a communication performance testing subsystem, a communication protocol consistency testing subsystem and an interoperability testing subsystem, wherein a main node carrier communication interface 01 and/or a sub-node carrier communication interface 02, a signal analyzer 21, a signal source 22 and a carrier transparent transceiving device 23 are connected through a switch matrix 24 to form the communication performance testing subsystem; the main node carrier communication interface 01 and/or the sub-node carrier communication interface 02 and the carrier transparent transceiving equipment 23 are connected through a switch matrix 24 to form a communication protocol consistency test subsystem; the multi-node carrier communication link unit 03 and the carrier transparent transceiving equipment 23 are connected through the switch matrix 24 and the signal matrix 25 to form an interoperability testing subsystem. The broadband carrier interconnection protocol requires that carriers support fifteen-level relays, and a minimum interoperability system needs fifteen sub-node shielding carrier units formed by arranging sub-node carrier signal coupling sampling units in a sub-node shielding box.
As shown in fig. 2, in this embodiment, the switch matrix 24 includes a power divider T, two attenuators ATT, a signal source switch K, and a plurality of connection lines, where the main node carrier communication interface 01, the sub-node carrier communication interface 02, and the main node CCO of the signal matrix are respectively connected to the power divider T through the connection lines, the power divider T is respectively connected to the signal analyzer 21, the signal source 22, and the carrier transparent transceiver 23 through the connection lines, one attenuator ATT is respectively disposed on connection lines between the main node carrier communication interface 01 and the power divider T and between the sub-node carrier communication interface 2 and the power divider T, and one signal source switch K is disposed on a connection line between the signal source 22 and the power divider T.
In the communication performance test, the access signal analyzer 21 is required to analyze the occupied bandwidth and the power spectral density of the carrier communication signal. The anti-attenuation performance requires that attenuation resistance is added between the main node carrier communication interface 01 and the sub-node carrier communication interface 02. The reference clock offset of the transparent transceiver 23 in the anti-frequency offset test requires the signal source 22 to provide an accurate clock. Meanwhile, the communication networking test requires the master node CCO to access fifteen levels of node communication through the signal matrix 25. Each sub-node carrier communication interface needs to be combined and connected into a communication link, and the signal source 22 is switched between the noise test and the frequency offset test through the radio frequency control switch. Because a plurality of devices to be tested are accessed, a power divider T is inevitably required to be introduced. The loss of the power divider T can be accurately measured by a vector network analyzer, and the broadband carrier signal can be accurately tested by coupling insertion loss and loss compensation of the power divider T.
As shown in fig. 5, in the multi-node carrier communication link unit 03 in this embodiment, fifteen attenuators ATT and fourteen power splitters T are sequentially connected at intervals through a connection line to form a signal matrix 25 having fifteen levels of nodes and at least fifteen levels of trunk branch attenuation, both front and rear ends of the signal matrix 25 are the attenuators ATT, the front-end attenuator ATT of the signal matrix 25 is externally connected to form a master node CCO of the signal matrix, the rear-end attenuator ATT of the signal matrix 25 externally forms a last level of branch node of the signal matrix, and each power splitter T externally forms a level of branch node of the signal matrix 25.
The realization of the controllability of the communication link in the carrier communication process requires a signal matrix of the path control device in addition to a clean environment. Each node can be accessed through the signal matrix, meanwhile, an attenuator on a link is adjustable, and the regulation and control of each level of the broadband carrier are realized. According to the broadband technical specification and the physical layer protocol, the adjustable attenuation of a communication path is about 110dB, and the performances of chip manufacturers are slightly different. The theoretical loss of the 3-branch device is 5dB, the attenuation of the 15-layer relay branch is completely in an effective range, and the last stage can be connected to a CCO main node under the condition that the attenuation is not adjusted completely, so that the star topology is realized. Each attenuator condition ranges from 0-127dB, and the maximum attenuator value can completely isolate the carrier communication signal without considering the insertion loss. And adjusting the attenuation value of the signal matrix according to the anti-attenuation performance of the performance test, so that the attenuation of each level can be adjusted, and tree topology connection is realized. According to the requirements, three independent signal matrixes can be configured, the simulation test of three phases of real power grid communication is realized, and advanced extension functions such as platform area archive identification and phase identification can be supported.
As shown in fig. 3 and 4, each of the main node carrier signal coupling sampling unit, the sub-node carrier signal coupling sampling unit, and the sub-node carrier signal coupling sampling unit includes a test bottom plate 43, a coupling sampling circuit, a power line filtering and shielding circuit 45, and an RF radio frequency transceiver 46 connected to the main node carrier communication interface, the sub-node carrier communication interface, or the sub-node carrier communication interface, where the device to be tested uses a 220V power frequency carrier and is connected to an external 220V switching power supply through an LN power line for power supply, the LN power line of the device to be tested has no load current, and the LN power line is connected to the power line filtering and shielding circuit 45 to isolate signals conducted and radiated in the air on the external carrier power line. Because the carrier signal is transmitted by using power frequency of a power line, the carrier signal cannot be directly connected to a precision instrument for measurement, and the power frequency and the power line need to be separated in a signal coupling sampling mode, the coupling sampling circuit in the embodiment separates strong current from weak current, the RF transceiver 45 couples and samples the 2-30MHz carrier signal through the inductive filter 44 on the coupling sampling circuit and converts LN power line impedance into standard 50 ohm impedance, and the problem that the carrier signal is attached to the strong current and cannot be accurately measured in a fixed value is solved. The RF transceiver 46 converts the collected power line carrier signal into an RF radio frequency signal and transmits the RF radio frequency signal to the main node carrier communication interface or the sub-node carrier communication interface.
The carrier communication uses 2-30MHz frequency band for transmission, and the modulation method uses OFDM. Under the condition of close distance, the carrier radiation power is large, mutual crosstalk is caused under the conditions of no shielding and isolation, and accurate positioning cannot be realized. Under the condition that carrier nodes are freely networked, the routing topology is time-varying and uncontrollable, and in order to accurately evaluate the carrier communication routing and the transceiving performance, a completely pure environment is needed, and all nodes are completely isolated and do not interfere with each other. The isolation shielding device designed in the embodiment is designed by using a low-frequency shielding box and a power line filter, and 220V strong current is introduced into the box body to solve the problem of broadband carrier zero-crossing detection and isolate conducted and aerial radiation signals on an external carrier power line.
As shown in fig. 1 and fig. 2, a detection method of a smart grid power broadband carrier communication detection system in this embodiment includes: to the equipment to be tested in main node shielding case 04 and/or child node shielding case 05 carry out communication performance test, communication performance test is given first place to unidirectional communication, and bidirectional communication is supplementary, and it includes: a signal source switch K is closed, and a main node carrier communication interface 01 and/or a sub-node carrier communication interface 02, a signal analyzer 21, a signal source 22 and carrier transparent transceiving equipment 23 are connected through a switch matrix 24 to form a communication performance testing subsystem; the software testing service platform sets a device to be tested to enter an application layer message transparent transmission serial port mode; the carrier transparent transceiver 23 continuously transmits data messages specified by the software testing service platform, wherein the transmission times and the transmission frame interval of the data messages are specified by the software testing service platform; the software testing service platform counts the success rate of the one-way communication; the software testing service platform sets the equipment to be tested to enter a carrier automatic return testing mode; the data received by the carrier transparent transceiver 23 is reported to a software test service platform; the software testing service platform counts the success rate of the two-way communication; the carrier transparent transceiver device 23 is placed in the main node shielding box 04 or the sub-node shielding box 05 and is connected with the software testing service platform through a network cable; the method for testing the consistency of the communication protocol of the equipment to be tested in the main node shielding box 04 and/or the sub-node shielding box 05 comprises the following steps: a signal source switch K is turned on, and the main node carrier communication interface 01 and/or the sub-node carrier communication interface 02 and the carrier transparent transceiving equipment 23 are connected through a switch matrix to form a communication protocol consistency test subsystem; the reason why the carrier transparent transceiving equipment 23 simultaneously starts the carrier transparent transceiving function and the carrier channel sensing function is that the reception of key messages is not missed in a scene of transmitting and receiving more messages and the key messages are sent back to the software testing service platform in time; the data organized by the software testing service platform is sent to a carrier communication medium of the equipment to be tested through a carrier transparent transceiving function, and a confirmation frame is automatically replied or not according to the requirement; all data on a communication channel of the equipment to be tested are sent to a software testing service platform in real time through a carrier channel monitoring function for analysis and judgment; the carrier transparent transceiver device 23 is placed in the main node shielding box 04 or the sub-node shielding box 05 and is connected with the software testing service platform through a network cable; and carrying out interoperability test on the equipment to be tested in the plurality of sub-node shielding boxes, wherein the interoperability test comprises the following steps: the signal source switch K is turned on, and the multi-node carrier communication link unit 03 and the carrier transparent transceiving equipment 23 are connected through the switch matrix 24 to form an interoperation test subsystem; a plurality of devices to be tested are respectively plugged into a test bottom plate in a plurality of sub-node shielding boxes, a plurality of RF (radio frequency) transceivers correspondingly connected with the devices to be tested are respectively and correspondingly plugged into a plurality of sub-node carrier communication interfaces, and the plurality of sub-node carrier communication interfaces are networked through a signal matrix 25; the CCO sends the obtained addresses of the carrier communication interfaces of the sub-nodes to the software testing service platform through the carrier transparent transceiver device 23; the carrier transparent transceiver starts a carrier channel interception function and sends data intercepted on a signal matrix main node channel to a software test service platform for analysis and judgment; respectively arranging carrier transparent transceiver equipment at each sub-node carrier communication interface to start a carrier channel sensing function, and sending sensed data on a single sub-node carrier communication interface channel to a software test service platform for analysis and judgment; the carrier transparent transceiver 23 is placed in the main node shielding box 04 or the sub-node shielding box 05 and connected with the software testing service platform through a network cable, and the carrier transparent transceiver arranged at each sub-node carrier communication interface is placed in the corresponding sub-node shielding box and connected with the software testing service platform through a network cable.
In this embodiment, the master node shielding box is internally provided with an integrated analog concentrator for working, and a concentrator module or a concentrator can be placed in the master node shielding box. An integrated electric meter tool is arranged in the sub-node shielding box, and an electric meter module and an electric energy meter can be placed in the sub-node shielding box. The signal analyzer monitors the waveform of the power line carrier communication signal, an integration period and a scanning bandwidth can be set, a frequency band between a rising edge and a falling edge set by the signal analyzer is read to serve as a broadband carrier working frequency band, and the power spectral densities of the highest points of the amplitudes within and outside the working frequency band range are respectively read. The signal source is used for generating white noise, narrow-band noise and impulse noise to simulate the noise of a carrier communication environment. The signal matrix is provided with an attenuation path, the relay level of the network-accessing sub-node shielding chamber is adjusted, and the networking environment in the actual field is simulated. The switch matrix introduces actual noise to the networking evaluation system through the small radio frequency switch matrix, and introduces the communication waveform into the signal analyzer for displaying and analyzing. The transparent transceiver is used for transceiving power line signals or carrying out carrier channel sensing.
In the embodiment, the coupling sampling circuit is arranged in each shielding box body, and a single node only needs to be coupled and sampled once, so that the path loss of the power line attenuator is reduced by half; the incoming line of the power line of the shielding box shields the carrier signal by filtering isolation, and the shielding box completely isolates the outside to shield radiation and conduct the carrier signal. The test bottom plate uses 220V power frequency carrier waves, and the problems of zero-crossing detection and synchronization of broadband carrier communication are solved. The test bottom plate is powered by an external switch power supply, no load current flows through the incoming line of the 220V power supply, the interference of the skin effect of the load current on a carrier transmission channel is solved, and the transmission channel is stable and controllable. The sub-node carrier communication interface is accessed to a signal matrix, the path is adjustable, and a star topology, a tree topology and two mixed modes are supported. The attenuator is controlled in a centralized way, the same port and IP are used for remote communication, local control is provided, and the adjustable range of 0-127dB in an ultra-large range is supported. The power line carrier signal sampling loss is small, the attenuation value can be quantized, and the precise measurement is realized through software point-by-point compensation correction. The three-phase real test environment of the power grid can be realized by using three signal matrixes without increasing the volumes of attenuators and filters, and the large-scale expansion is supported, and the large-scale node, multi-network coordination, phase identification and station area identification test are supported.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A smart grid power broadband carrier communication detection system, characterized in that, the detection system includes: the multi-node carrier communication link unit is formed by connecting and combining at least fifteen sub-node carrier communication interfaces through a signal matrix, each sub-node shielding box is internally provided with a sub-node carrier signal coupling and sampling unit for sending sub-node carrier signals to the sub-node carrier communication interfaces, the main node of the main node carrier communication interface, the sub-node carrier communication interface and the signal matrix is connected to a signal analyzer, a signal source and a carrier transparent transceiver device through a switch matrix, and the carrier transparent transceiver device is arranged in a main node shielding box or a sub-node shielding box.
2. The smart grid power broadband carrier communication detection system according to claim 1, wherein the main node carrier communication interface and/or the sub-node carrier communication interface, the signal analyzer, the signal source and the carrier transparent transceiver device are connected through a switch matrix to form a communication performance test subsystem.
3. The smart grid power broadband carrier communication detection system according to claim 1, wherein the main node carrier communication interface and/or the sub-node carrier communication interface and the carrier transparent transceiver device are connected through a switch matrix to form a communication protocol conformance testing subsystem.
4. The smart grid power broadband carrier communication detection system according to claim 1, wherein the multi-node carrier communication link unit and the carrier transparent transceiver device are connected through a switch matrix and a signal matrix to form an interoperability test subsystem.
5. The smart grid power broadband carrier communication detection system according to claim 1, wherein the switch matrix comprises a power divider, two attenuators, a signal source switch, and a plurality of connection lines, the master node of the master node carrier communication interface, the sub-node carrier communication interface, and the master node of the signal matrix are respectively connected to the power divider through the connection lines, the power divider is respectively connected to the signal analyzer, the signal source, and the carrier transparent transceiver device through the connection lines, the attenuator is respectively disposed on the connection lines between the master node carrier communication interface and the power divider, and the signal source switch is disposed on the connection line between the signal source and the power divider.
6. The smart grid power broadband carrier communication detection system of claim 1, wherein the at least fifteen sub-node carrier communication interfaces are composed of a main node carrier communication interface and a sub-node carrier communication interface.
7. The smart grid power broadband carrier communication detection system of claim 1, wherein the at least fifteen sub-node carrier communication interfaces are all sub-node carrier communication interfaces.
8. The smart grid power broadband carrier communication detection system according to claim 4, wherein the multi-node carrier communication link unit is formed by sequentially connecting at least fifteen attenuators and at least fourteen power dividers at intervals through connecting lines to form a signal matrix with at least fifteen levels of node and at least fifteen levels of relay branch attenuation, the front end and the rear end of the signal matrix are both attenuators, the front end attenuator of the signal matrix is externally connected to form a main node of the signal matrix, the rear end attenuator of the signal matrix is externally connected to form a last level of branch node of the signal matrix, and each power divider is externally connected to form a level of branch node of the signal matrix.
9. The system according to claim 1, wherein the main node carrier signal coupling sampling unit, the sub-node carrier signal coupling sampling unit, and the sub-node carrier signal coupling sampling unit each include a test board, a coupling sampling circuit, a power line filtering and shielding circuit, and an RF transceiver connected to a main node carrier communication interface, a sub-node carrier communication interface, or a sub-node carrier communication interface, wherein the main node carrier signal coupling sampling unit, the sub-node carrier signal coupling sampling unit, and the sub-node carrier signal coupling sampling unit are plugged into a device under test, the device under test uses a 220V power frequency carrier and is connected to an external 220V switching power supply through an LN power line, the power line of the device under test has no load current, the LN power line connecting power line filtering and shielding circuit isolates conducted and aerial radiation signals on an external carrier power line, and the RF transceiver couples and samples 2-30MHz carrier signals through an inductive filter on the coupling sampling circuit and converts LN impedance into LN power line impedance And the RF radio frequency transceiver converts the collected power line carrier signals into RF radio frequency signals and sends the RF radio frequency signals to the main node carrier communication interface or the sub-node carrier communication interface.
10. The detection method of the smart grid power broadband carrier communication detection system according to any one of claims 1-9, wherein the detection method comprises the following steps:
the communication performance test is carried out to the equipment to be tested in the main node shielding box and/or the sub-node shielding box, and the method comprises the following steps: the signal source switch is closed, and the main node carrier communication interface and/or the sub-node carrier communication interface, the signal analyzer, the signal source and the carrier transparent transceiver device are connected through the switch matrix to form a communication performance testing subsystem; the software testing service platform sets a device to be tested to enter an application layer message transparent transmission serial port mode; the carrier wave transparent transceiving equipment continuously sends data messages appointed by a software testing service platform, wherein the sending times and sending frame intervals of the data messages are appointed by the software testing service platform; the software testing service platform counts the success rate of the one-way communication; the software testing service platform sets the equipment to be tested to enter a carrier automatic return testing mode; the data received by the carrier transparent transceiver device is reported to a software test service platform; the software testing service platform counts the success rate of the two-way communication;
the method for testing the consistency of the communication protocol of the equipment to be tested in the main node shielding box and/or the sub-node shielding box comprises the following steps: the signal source switch is turned on, and the main node carrier communication interface and/or the sub-node carrier communication interface and the carrier transparent transceiving equipment are connected through the switch matrix to form a communication protocol consistency test subsystem; the carrier transparent transceiver simultaneously starts a carrier transparent transceiving function and a carrier channel monitoring function; the data organized by the software testing service platform is sent to a carrier communication medium of the equipment to be tested through a carrier transparent transceiving function, and a confirmation frame is automatically replied or not according to the requirement; all data on a communication channel of the equipment to be tested are sent to a software testing service platform in real time through a carrier channel monitoring function for analysis and judgment; and
the interoperability test is carried out to the equipment to be tested in a plurality of sub-node shielding boxes, and the interoperability test comprises the following steps: the signal source switch is turned on, and the multi-node carrier communication link unit and the carrier transparent transceiving equipment are connected through the switch matrix to form an interoperability test subsystem; the device to be tested is respectively plugged into a test bottom plate in the sub-node shielding boxes, a plurality of RF (radio frequency) transceivers correspondingly connected with the device to be tested are respectively and correspondingly plugged into a plurality of sub-node carrier communication interfaces, and the sub-node carrier communication interfaces are networked through a signal matrix; the signal matrix main node sends the obtained addresses of the carrier communication interfaces of the sub-nodes to the software testing service platform through the carrier transparent transceiver; the carrier transparent transceiver starts a carrier channel interception function and sends data intercepted on a signal matrix main node channel to a software test service platform for analysis and judgment; respectively arranging carrier transparent transceiver equipment at each sub-node carrier communication interface to start a carrier channel sensing function, and sending sensed data on a single sub-node carrier communication interface channel to a software test service platform for analysis and judgment; and the carrier transparent transceiving equipment arranged on each sub-node carrier communication interface is placed in the corresponding sub-node shielding box and is connected with the software testing service platform through a network cable.
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| CN110572183A (en) * | 2019-08-01 | 2019-12-13 | 国网上海市电力公司 | Low-voltage distribution network power line carrier communication performance quantitative test system |
| CN110493063B (en) * | 2019-08-30 | 2020-12-29 | 北京智芯微电子科技有限公司 | Power line carrier multistage networking test system based on distributed noise injection and wireless connection |
| CN110519108A (en) * | 2019-09-24 | 2019-11-29 | 深圳市国电科技通信有限公司 | A kind of constructing communication network environment construction method |
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