CN106332170A - A Broadband Carrier Communication Performance Testing System - Google Patents

Abstract

The invention discloses a broadband carrier communication performance detecting system. The system is composed of a point-to-point communication performance detecting system and a communication networking testing system. The point-to-point communication performance detecting system is used for evaluating transmission power, transmission frequency offset, out-of-band spurious components, a reception dynamic range and anti-noise performance of equipment related to power line carrier communication and micropower wireless communication in an electricity utilization information acquisition system. The communication networking testing system is used for evaluating a local communication routing networking ability of the electricity utilization information acquisition system by using a computer to set a plurality of path schemes including a through path and an attenuation path and using a pre-assumed program to perform different permutations and combinations. The electricity utilization information acquisition system, collects, monitors and manages information such as electric energy of a plurality of electric energy meters in a centralized manner by a master station through a transmission medium. The system has functions of signal power testing, spectrum analysis, program control attenuation, noise simulation, power supply filtering and isolation, signal shielding and the like.

Description

A Broadband Carrier Communication Performance Testing System

technical field

The invention relates to the technical field of carrier communication performance detection, in particular to a broadband carrier communication performance detection system.

Background technique

The State Grid Corporation proposed to build a modern company with "strong power grid, excellent assets, high-quality service, and outstanding performance". The smart grid construction work closely focuses on the development goal of "one strong and three excellent", and in accordance with the requirements of "collective operation, intensive development, lean management, and standardized construction", accelerate the construction of marketing modernization and measurement standardization, and enhance the "big marketing" "Measurement intensification, specialization, standardization, and automation level under the system will enhance the core competitiveness of marketing.

As an important part of building a smart grid, the electricity consumption information collection system undertakes the important tasks of automatic collection, efficient sharing and real-time monitoring of electricity consumption information. During the construction process, choosing a stable, reliable, real-time, and safe local communication method is the key to ensure the safe and stable operation of the system, which directly affects the reliability and acquisition success rate of the communication between the concentrator and the collector (electric energy meter). Communication The choice and application of the scheme is the difficulty in the construction of the electricity information collection system, which determines the success or failure of the system construction.

At present, the State Grid is gradually promoting the application of broadband carrier communication technology in the construction of power consumption information collection system. However, there is still no set of mature detection equipment to evaluate the performance of broadband carrier communication and to detect the performance of broadband carrier communication network.

Chongqing Electric Power Company is responsible for the detection of centralized bidding equipment for the collection of power consumption information of provincial grid companies. As a new type of communication product, broadband communication equipment has been successfully applied in the electricity consumption information collection market. As the next-generation upgrade and speed-up product of the power consumption information collection system, it has obtained the access license from the State Grid. The frequency range of broadband carrier communication is 1M-200M, and the maximum design speed can reach 50M. At present, the Electric Power Research Institute does not have such means of testing communication equipment.

Contents of the invention

In view of the above problems, the present invention provides a broadband carrier communication performance detection system. The power consumption information collection system is to collect the electric energy and other information of multiple electric energy meters by the master station through the transmission medium (wireless, wired, power line carrier and other channels) For collection, monitoring and management, the system has functions such as signal power testing, spectrum analysis, program-controlled attenuation, noise simulation, power filtering and isolation, and signal shielding, which can effectively solve problems in the background technology.

In order to achieve the above object, the technical solution adopted by the present invention is as follows: a broadband carrier communication performance detection system, which is composed of a point-to-point communication performance detection system and a communication networking test system;

The point-to-point communication performance test system is used to evaluate the transmit power, transmit frequency offset, out-of-band spurious components, receive dynamic range and anti-noise performance of power line carrier communication and micro-power wireless communication related equipment in the power information collection system;

The communication networking test system sets various path schemes through a computer, including a straight-through path and an attenuation path, and performs different permutations and combinations through a pre-conceived program to evaluate the ability of the local communication routing network of the power consumption information collection system .

Preferably, the point-to-point communication performance testing system is controlled by a computer, and the radio frequency switch matrix, the main node shielding room, the spectrum analyzer, the noise source, the vector signal generator and the sub-node shielding room are controlled through a switch.

Preferably, the working frequency band testing method of the point-to-point communication performance testing system: when the concentrator or the meter module is in the state of continuous transmission or meter reading, test the working frequency range of the concentrator or the meter module by controlling the spectrum analyzer.

Preferably, the transmission power spectral density testing method of the point-to-point communication performance testing system: in the state of continuous transmission or meter reading, test the power spectral density of the concentrator or the meter module in the specified working frequency band by controlling the spectrum analyzer, and then test 0.1 The power spectral density of the initial operating frequency of MHz, and then test the power spectral density of the terminating operating frequency of 30MHz, and finally test the power spectral density of the terminating operating frequency of 50MHz.

Preferably, the module interchangeability testing method of the point-to-point communication performance testing system: use PC software as a virtual concentrator and a virtual electric energy meter, send Q/GDW1376.2 instruction frames to the local module of the concentrator, exchange Send 645 data frames, and check whether the response time, frame format, and frame content of the module response frame conform to the protocol specification.

Preferably, the steps of the power consumption testing method of the point-to-point communication performance testing system are as follows:

1) Control the module control board through the PC-side software, so that the tested module is in a non-communication state;

2), the module control board samples the output current of the module;

3) The PC-side software collects relevant data and calculates the power consumption of the tested module.

Preferably, the anti-noise performance testing steps of the point-to-point communication performance testing system are as follows:

1) Control the small switch matrix through the PC-side software, set the attenuation value, interrupt the communication link connection with the sub-node shielding room, let the main node module enter the test state, and test its attenuated transmission power;

2) Use the PC software to control the signal generator to emit white noise in the specified frequency band;

3) Control the small switch matrix through the PC-side software, set the attenuation value, open the communication link connection with the sub-node shielding room, let the main node module transmit the request to confirm the data frame, and the PC-side software monitors the return confirmation frame of the sub-node , save the data result;

4) Repeat the above steps to perform a limit test to obtain a receiving dynamic range that can communicate normally under noise interference.

Preferably, the spurious radiation testing steps of the point-to-point communication performance testing system are as follows:

1) Control the module control board through the PC software to let the module under test enter the emission state;

2) Control the spectrum analyzer through the PC-side software to output signals through the RF line detection module, and read the stray radiation power changes within the frequency range of ±200KHz and ±500KHz at the 1-fold frequency and 2-fold frequency of the signal center frequency;

3) The PC-side software collects relevant data and calculates the stray radiation of the module under test.

Preferably, the communication networking test system is controlled by a computer through a switch to control the main node shielding cell, several sub-node shielding cells, the radio frequency switch matrix, the spectrum analyzer and the signal matrix, and each part is connected with the signal matrix as the center.

Preferably, the communication anti-crosstalk test steps of the communication networking test system are as follows:

1) Through the PC software to control the signal matrix, all the equipment in the sub-node shielding cell are the first-layer communication network of the master node shielding cell equipment;

2) All sub-node shielding cells are divided into two groups, and 10 sub-node shielding cells are selected for each group. Load all the measurement point files of the first group of sub-node shielded cells into the main node module; the PC-side software executes the meter reading operation, and calculates the current meter reading success rate and meter reading time;

3), add an interference source concentrator, load all the measurement point files of the second group of sub-node shielding cells into the main node module of the interference source concentrator, and connect to the matrix communication link;

4) The PC-side software executes the meter reading operation of the first group of master node modules again, and calculates the success rate of meter reading and the meter reading time at this time;

5) Comparing the meter reading success rate and meter reading time of the two times, the smaller the difference, the stronger the anti-crosstalk ability, which can be used as a measure of the anti-crosstalk ability between two manufacturers.

Preferably, the actual noise simulation method steps of the communication networking test system are as follows:

1) Through the industrial computer control signal matrix, the equipment in the shielding box of the sub-node and the communication unit in the shielding box of the main node form a network structure of the required level;

2) Control the equipment in the shielding box of the main node through the industrial computer, check the networking situation and the meter reading situation;

3) Introduce a vector signal generator or other noise sources through the industrial computer control switch matrix, and send noise to the networking system;

4) Control the equipment in the shielding box of the main node through the industrial computer, and check the networking situation and the meter reading situation after the noise is introduced;

5) The industrial computer collects relevant data and evaluates the anti-noise ability of the equipment under test.

Preferably, the carrier channel attenuation simulation method steps of the communication networking test system are as follows:

1) Set the switch matrix built-in attenuator and the signal matrix to connect the attenuation path between each node, so as to build a certain network structure to realize the simulation of channel attenuation;

2) Query the meter reading success rate information in the shielding box of each communication sub-node through the shielding box of the main node, and realize the evaluation of the current channel attenuation network.

Preferably, the topology structure of the communication networking test system and the routing simulation method steps are as follows:

1), combined with the actual application requirements and the network topology setting conditions of the networking equipment, set the built-in attenuator of the switch matrix and the attenuator connected between each node of the signal matrix, so as to build a certain network topology to simulate the actual networking environment;

2) Through the local communication unit of the concentrator, query the relay level and routing information of the communication unit of the electric energy meter in each sub-node shielded cell, so as to realize the evaluation of the networking performance of the communication unit under the current topology network structure.

Beneficial effects of the present invention:

The electricity consumption information collection system of the present invention is that the master station centrally collects, monitors and manages the electric energy and other information of multiple electric energy meters through the transmission medium (wireless, wired, power line carrier and other channels). The system has signal power test, spectrum analysis, Programmable attenuation, noise simulation, power filtering and isolation, signal shielding and other functions.

Description of drawings

Fig. 1 is a schematic diagram of point-to-point system device connection in an embodiment of the present invention;

Fig. 2 is a schematic diagram of connection of concentrator local module interchangeability testing equipment in an embodiment of the present invention;

Fig. 3 is a functional block diagram of power consumption test in the embodiment of the present invention;

Fig. 4 is a schematic block diagram of anti-noise ability test in the embodiment of the present invention;

Fig. 5 is a schematic block diagram of a stray radiation test in an embodiment of the present invention;

Fig. 6 is a connection diagram of the communication networking test system in the embodiment of the present invention;

FIG. 7 is a schematic block diagram of communication anti-crosstalk evaluation test in an embodiment of the present invention;

FIG. 8 is a schematic diagram of actual noise simulation in an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example:

The invention provides a broadband carrier communication performance detection system, which is composed of a point-to-point communication performance detection system and a communication networking test system;

The point-to-point communication performance test system is used to evaluate the transmit power, transmit frequency offset, out-of-band spurious components, receive dynamic range and anti-noise performance of power line carrier communication and micro-power wireless communication related equipment in the power information collection system;

The communication networking test system sets various path schemes through a computer, including a straight-through path and an attenuation path, and performs different permutations and combinations through a pre-conceived program to evaluate the ability of the local communication routing network of the power consumption information collection system .

1. The point-to-point communication performance test system is controlled by a computer, which controls the RF switch matrix, main node shielding chamber, spectrum analyzer, noise source, vector signal generator and sub-node shielding chamber through a switch. (As shown in Figure 1)

1.1. Working frequency band test

Test purpose: To test whether the working frequency range of the power line broadband communication unit complies with the Q/GDW374.3 communication unit technical specification in the continuous transmission state.

Test equipment: PC software, master node shielding chamber (internal access to concentrator local communication unit), child node shielding chamber (internal access to single/three-phase electric energy meter module), spectrum analyzer, signal generator.

Test method: When the concentrator or the meter module is in the state of continuous transmission or meter reading, test the working frequency range of the concentrator or the meter module by controlling the spectrum analyzer.

1.2. Transmission power spectral density test

Test purpose: To test whether the power spectral density of the power line broadband communication unit in the working frequency band and outside the working frequency band in the continuous transmission state or the meter reading state conforms to the Q/GDW374.3 communication unit technical specification.

Test equipment: PC software, master node shielding chamber (internal access to concentrator local communication unit), child node shielding chamber (internal access to single/three-phase electric energy meter module), spectrum analyzer, signal generator.

Test method: In the state of continuous transmission or meter reading, test the power spectral density of the concentrator or meter module in the specified working frequency band by controlling the spectrum analyzer, then test the power spectral density of the 0.1MHz~starting working frequency, and then test the termination The power spectral density of the working frequency ~30MHz, and finally test the power spectral density of the termination working frequency ~50MHz.

1.3. Module interchangeability test: (as shown in Figure 2)

The purpose of the test: to evaluate whether the communication protocol between the type I communication unit of the concentrator and the concentrator complies with the Q/GDW1376.2 specification; to evaluate whether the single/three-phase electric energy meter mode complies with the 645-1997, 645-2007 protocol specifications.

Test equipment: PC software, main node shielding chamber (internal access to the local communication unit of the concentrator), sub-node shielding chamber (internal access to single/three-phase electric energy meter module).

Test method: PC software is used as a virtual concentrator and a virtual energy meter, and the Q/GDW1376.2 command frame is exchanged to the local module of the concentrator, and 645 data frames are exchanged to the energy meter module, and the response time, frame format, and Whether the frame content conforms to the protocol specification.

1.4. Power consumption test (as shown in Figure 3)

The test steps are as follows:

1) Control the module control board through the PC-side software, so that the tested module is in a non-communication state;

2), the module control board samples the output current of the module;

3) The PC-side software collects relevant data and calculates the power consumption of the tested module.

1.5. The test steps of anti-noise performance are as follows: (as shown in Figure 5)

The test steps are as follows:

1) Control the small switch matrix through the PC-side software, set the attenuation value, interrupt the communication link connection with the sub-node shielding room, let the main node module enter the test state, and test its attenuated transmission power.

2) Use the PC software to control the signal generator to emit white noise in the specified frequency band.

3) Control the small switch matrix through the PC-side software, set the attenuation value, open the communication link connection with the sub-node shielding room, let the main node module transmit the request to confirm the data frame, and the PC-side software monitors the return confirmation frame of the sub-node , save the data result.

4) Repeat the above steps to perform a limit test to obtain a receiving dynamic range that can communicate normally under noise interference.

1.6. The stray radiation test steps are as follows: (as shown in Figure 6)

1) Control the module control board through the PC software to let the module under test enter the emission state;

2) Control the spectrum analyzer through the PC-side software to output signals through the RF line detection module, and read the stray radiation power changes within the frequency range of ±200KHz and ±500KHz at the 1-fold frequency and 2-fold frequency of the signal center frequency;

3) The PC-side software collects relevant data and calculates the stray radiation of the module under test.

2. As shown in Figure 7, the communication network test system is controlled by the computer through the switchboard to control the main node shielding chamber, several sub-node shielding chambers, radio frequency switch matrix, spectrum analyzer and signal matrix. Each part is connected with the signal matrix as the center, such as Complete routing table construction, routing convergence, routing copying, adaptive routing modification, etc. in the shortest time.

2.1 Communication anti-crosstalk test steps are as follows: (as shown in Figure 8)

1) Through the PC software to control the signal matrix, all the equipment in the sub-node shielding cell are the first-layer communication network of the master node shielding cell equipment;

2) All sub-node shielding cells are divided into two groups, and 10 sub-node shielding cells are selected for each group. Load all the measurement point files of the first group of sub-node shielded cells into the main node module; the PC-side software executes the meter reading operation, and calculates the current meter reading success rate and meter reading time;

3), add an interference source concentrator, load all the measurement point files of the second group of sub-node shielding cells into the main node module of the interference source concentrator, and connect to the matrix communication link;

4) The PC-side software executes the meter reading operation of the first group of master node modules again, and calculates the success rate of meter reading and the meter reading time at this time;

5) Comparing the meter reading success rate and meter reading time of the two times, the smaller the difference, the stronger the anti-crosstalk ability, which can be used as a measure of the anti-crosstalk ability between two manufacturers.

2.2. The actual noise simulation method steps are as follows:

1) Through the industrial computer control signal matrix, the equipment in the shielding box of the sub-node and the communication unit in the shielding box of the main node form a network structure of the required level;

2) Control the equipment in the shielding box of the main node through the industrial computer, check the networking situation and the meter reading situation;

3) Introduce a vector signal generator or other noise sources through the industrial computer control switch matrix, and send noise to the networking system;

4) Control the equipment in the shielding box of the main node through the industrial computer, and check the networking situation and the meter reading situation after the noise is introduced;

5) The industrial computer collects relevant data and evaluates the anti-noise ability of the equipment under test.

2.3. The steps of carrier channel attenuation simulation method are as follows:

1) Set the switch matrix built-in attenuator and the signal matrix to connect the attenuation path between each node, so as to build a certain network structure to realize the simulation of channel attenuation;

2) Query the meter reading success rate information in the shielding box of each communication sub-node through the shielding box of the main node, and realize the evaluation of the current channel attenuation network.

2.4 The topology structure of the communication networking test system and the steps of the routing simulation method are as follows:

1), combined with the actual application requirements and the network topology setting conditions of the networking equipment, set the built-in attenuator of the switch matrix and the attenuator connected between each node of the signal matrix, so as to build a certain network topology to simulate the actual networking environment;

2) Through the local communication unit of the concentrator, query the relay level and routing information of the communication unit of the electric energy meter in each sub-node shielded cell, so as to realize the evaluation of the networking performance of the communication unit under the current topology network structure.

Based on the above, the advantage of the present invention is that the power consumption information collection system of the present invention collects, monitors and manages the electric energy and other information of multiple electric energy meters through the transmission medium (wireless, wired, power line carrier and other channels) by the master station. The system has functions such as signal power test, spectrum analysis, program-controlled attenuation, noise simulation, power filtering and isolation, and signal shielding.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (13)

1. a bandwidth carrier communication performance detecting system, it is characterised in that this system is by point-to-point communication performance detecting system With constructing communication network test system composition；Described point-to-point communication Performance Test System is used for assessing in power information acquisition system electricity Powerline carrier communication, the transmitting power of micro power radio communication relevant device, transmitting frequency deviation, band stray component, reception are dynamically Scope and noise robustness；Described constructing communication network test system by the multiple route scheme of computer settings, including through path, Decay path, by the program imagined in advance, carries out different permutation and combination, is used for assessing power information acquisition system this locality and leads to The ability of letter route networking.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical Letter Performance Test System by computer control, by Switch control radio-frequency (RF) switch matrix, host node shielded cubicle, audiofrequency spectrometer, Noise source, vector signal generator and child node shielded cubicle.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The working frequency range method of testing of letter Performance Test System: be at concentrator or ammeter module and launch or check meter under state continuously, The working frequency range scope of concentrator or ammeter module is tested out by controlling audiofrequency spectrometer.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The transmitting power spectral density method of testing of letter Performance Test System: launching continuously or under state of checking meter, by controlling audiofrequency spectrometer Testing out concentrator or ammeter module in assigned work frequency range internal power spectrum density, then test 0.1MHz initiates operating frequency Power spectral density, then tests out the power spectral density terminating operating frequency 30MHz, and last test goes out to terminate operating frequency The power spectral density of 50MHz.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The module interchangeability method of testing of letter Performance Test System: do virtual concentrator and virtual electric energy meter by PC software, to concentration Device this locality module sends out Q/GDW1376.2 command frame mutually, sends out 645 Frames, the sound of detection module response frame mutually to electric energy meter module Between Ying Shi, frame format, content frame whether meet protocol specification.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The power consumption test method step of letter Performance Test System is as follows:

1), by PC end software control module panel, tested module is allowed to be in non-communicating state；

2), module output current is sampled by module panel；

3), PC end software collect related data, calculate tested module power consumption.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The noiseproof feature testing procedure of letter Performance Test System is as follows:

1), control switchette matrix by PC end software, pad value is set, interrupt the communication link with child node shielded cubicle Connect, allow host node module enter test state, test its transmitting power after overdamping；

2) white noise of designated frequency band, is sent with PC end software control signals generator；

3), control switchette matrix by PC end software, pad value is set, open the communication link with child node shielded cubicle Connecting, the return acknowledgement frame of child node is monitored by Frame, PC end software to allow host node module transmission requests determine, preserves Data result；

4), repeat above step, carry out limit test, obtain the reception dynamic range of energy proper communication under noise jamming.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described point-to-point logical The stray radiation testing procedure of letter Performance Test System is as follows:

1), by PC software control module panel, allow tested module enter and launch state；

2) audiofrequency spectrometer, by PC end software is controlled by radio frequency line detection module output signal, reading signal center frequency 1 frequency multiplication And 2 at frequency multiplication ± 200KHz, stray radiant power change in ± 500KHz frequency range；

3), PC end software collect related data, calculate tested module stray radiation.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described constructing communication network Test system by computer by Switch control host node shielded cubicle, some child node shielded cubicles, radio-frequency (RF) switch matrix, Audiofrequency spectrometer and signal matrix, various piece connects each other centered by signal matrix.

A kind of bandwidth carrier communication performance detecting system the most according to claim 1, it is characterised in that described communication set The communication resistance to crosstalk testing procedure of net test system is as follows:

1), by PC software control signals matrix, the equipment in all child node shielded cubicles is host node shielded cubicle The ground floor communication network of interior equipment；

2), all child node shielded cubicles are divided into two groups, often selected 10 the sub-node shield cells of group；By first group of child node All measurement point archives of shielded cubicle are loaded into host node module；PC end software performs to check meter operation, calculate current once Success rate of checking meter and checking meter the time；

3), add an interference source concentrator, all measurement point archives of second group of child node shielded cubicle are loaded into interference source collection Middle device host node module, is connected into Matrix Communication link；

4), PC end software again perform first group of host node module and check meter operation, the success rate of once checking meter now calculated With the time of checking meter；

5), comparing the success rate and checking meter the time of checking meter of twice, difference is the least, and resistance to crosstalk ability is the strongest, can be as Liang Ge producer Between resistance to crosstalk ability criterion.

11. a kind of bandwidth carrier communication performance detecting systems according to claim 1, it is characterised in that described communication set The actual noise emulation mode step of net test system is as follows:

1), by industrial computer control signal matrix, the equipment in child node shielded box and the communication unit in host node shielded box are allowed Unit forms the network structure of required level；

2), by industrial computer control host node shielding box equipment, check networking situation and ammeter copy reading situation；

3), by industrial computer control switch matrix and introduce vector signal generator or other noise sources, send in group network system Noise；

4), by industrial computer control host node shielding box equipment, check the networking situation after introducing noise and ammeter copy reading feelings Condition；

5), industrial computer collects related data, assessment equipment under test anti-noise ability.

12. a kind of bandwidth carrier communication performance detecting systems according to claim 1, it is characterised in that described communication set The carrier channel decay emulation mode step of net test system is as follows:

1), the built-in attenuator of switch matrix and the signal matrix each internodal decay path of connection are set, thus build certain Network structure realize emulation to fading channel；

2), the success rate information of checking meter in each communicator node shield case is inquired about by host node shielded box, it is achieved to current letter The assessment of road attenuation network.

13. a kind of bandwidth carrier communication performance detecting systems according to claim 1, it is characterised in that described communication set Topological structure and the routing simulation method step of net test system are as follows:

1), combine practice demand and networking equipment network topology structure arranges condition, the built-in attenuator of switch matrix is set And signal matrix connects each internodal attenuator, thus build certain network topology structure and simulate actual networking ring Border；

2), by the relaying rank of electric energy meter communication unit in the concentrator area communication units each child node shielded cubicle of inquiry, Routing iinformation, thus realize the assessment of the networking performance of communication unit under present topology network structure.