CN103777104B - Digitalized substation secondary signal transmission system time-delay characteristics test device and method - Google Patents

Digitalized substation secondary signal transmission system time-delay characteristics test device and method Download PDF

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CN103777104B
CN103777104B CN201410062577.5A CN201410062577A CN103777104B CN 103777104 B CN103777104 B CN 103777104B CN 201410062577 A CN201410062577 A CN 201410062577A CN 103777104 B CN103777104 B CN 103777104B
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data
signal
delay
time
mutual inductor
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CN201410062577.5A
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Chinese (zh)
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CN103777104A (en
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陶骞
高艺璇
王晋
崔铂
崔一铂
陈文�
游力
孙建军
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国家电网公司
国网湖北省电力公司电力科学研究院
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Abstract

The present invention provides a kind of digitalized substation secondary signal transmission system time-delay characteristics test device and method, can test digitalized substation secondary signal transmission system (arbitrary node between combining unit output to intelligent power equipment) time-delay characteristics.Compatibility Ethernet interface of the present invention and optical fiber interface, produce amplitude with three-phase controlled amplitude modulation power supply and press the delay test signal of mechanical periodicity, frequency stable, demarcate cycle position by the size of amplitude, solve the complete cycle ripple time delay interference to delay test;Use from synchronizing clock signals occurs, it is ensured that the stringent synchronization that internal sample is sampled with signal circuit, it is ensured that the accuracy of detected time-delay characteristics;Use window contrast to determine the corresponding relation of internal sample point and signal circuit sampled point, the time difference of the corresponding sampled point of comparing calculation, obtain time-delay characteristics information, and can response system transmission time difference wobble information.

Description

Digitalized substation secondary signal transmission system time-delay characteristics test device and method
Technical field
The present invention relates to technical field of electric power detection, specifically a kind of digitalized substation secondary letter Number transmission system delay characteristic test device and method.
Background technology
Digital transformer substation refer to transformer station information gathering, transmit, process, output procedure complete Portion's digitized, basic feature is device intelligence, communication network, model and communication protocol system One change, computer-aided traffic control etc..By electronic mutual inductor, electrical network analogue signal is sampled as Digital signal, is collected information by combining unit, according to IEC61850-9-1/2 standard, and will The digital signal comprising electric parameters is transmitted with ethernet frame format, by switch and ether Net transmits information to the device such as relay protection device and station level oscillograph.Digital transformer substation It is inevitable requirement and the key character of intelligent grid development.
The signals transmission of digital transformer substation is as follows, is passed by electronic type transformer high voltage side Sense head realizes the collection of electrical network electric parameters, samples through A/D, is pressed with digital signal by optical fiber Exporting to combining unit according to specific format, combining unit collects the electric of Multi-path electricity minor transformer Amount information, according to IEC61850-9-1/2 standard, converts optical signals to digital signal, and with Ethernet frame format synchronism output is to switch, and switch passes through fiber optic Ethernet by digital electric Amount information passes to intelligent power equipment (IED), digital relay protection equipment and station level The equipment such as failure wave-recording, complete rapid, accurate at whole digital transformer substation of electric parameters signal Transmission.But, electronic mutual inductor, combining unit and Ethernet transmission, its data pass Defeated and processing procedure needs the regular hour, i.e. transmission delay.Export the big of transmission delay Little, can directly influence power system detect, measure, monitor, the device such as relay protection just Often work, will cause malfunction or the tripping of protective relaying device time serious, cause power grid accident Occur and expand, therefore digitalized substation secondary signal must be transmitted for intelligent substation The time-delay characteristics of system detect, it is judged that whether it meets the relevant skills such as metering and relay protection Art code requirement.
Digital transformer substation transmitting procedure is digital quantity, it is impossible to by oscillograph or power quality analysis The traditional methods such as instrument are tested.But existing delay test is mainly directed towards transformer and merging Unit, be not applicable to whole digitized secondary singal transmission system delay test device and Method is traditional based on the digital transformer substation transformer data that steady-state sine ripple is testing source Acquisition system method of calibration, due to sinusoidal wave periodicity and symmetry, it is impossible to effectively differentiate Existence more than power frequency period time delay (time delay complete cycle).And present current immediate time delay Method of testing is to detect towards the absolute time delay of intelligent substation mutual inductor data collection system, test Method is: utilizes code power to export coded sinusoidal voltage, current signal, accesses electronic type mutual The primary side of sensor, uses and controls work station to standard mutual inductor output and electronic type mutual inductance to be measured Device output is beaten markers and is realized synchronizing, after being sampled by standard potential transformer summation current transformer, Compare analysis with tested merging unit of electronic transformer output signal again and obtain tested system The transmission delay amount of system.The method is used to be only capable of transformer and combining unit data collecting system Definitely time delay detects, and is not suitable for digitalized substation secondary signal transmission system;In addition Due to digitalized substation secondary signal transmission system delay package time delay Han nondeterministic network, therefore The method it cannot be guaranteed that standard mutual inductor and to-be-tested transformer sampling synchronization;And Digitized transformation Secondary singal of standing transmission system delay changes with network state change, and non-determined is constant Value, the method only calculates system entirety time delay, therefore the method can not fully reflect Digitized transformation The time-delay characteristics of the uncertain time delay that secondary singal of standing transmission system is brought due to network delay.
Summary of the invention
The purpose of patent of the present invention is for the deficiencies in the prior art, proposes a kind of based on controlled tune The digitalized substation secondary signal transmission system time-delay characteristics test device and method of width power supply, Solve prior art and be not suitable for the limitation of digitalized substation secondary signal transmission system, with And definitely delay test result is the most accurate, it is impossible to transmission thrashing performance is detected not Foot, and time delay complete cycle of transmission system can be accurately reflected.
The technical solution used in the present invention is as follows:
A kind of digitalized substation secondary signal transmission system time-delay characteristic system safety testing device, including mark Quasi-transformer, electronic mutual inductor and be made up of combining unit, switch and Ethernet Digitalized substation secondary signal transmission system, it is characterised in that: also include the controlled amplitude modulation of three-phase Power supply, A/D sampler and control work station, described three-phase controlled amplitude modulation power supply is used for receiving From the command pulse of control work station, output amplitude presses the test letter of mechanical periodicity, frequency stable Number, described test signal obtains analog output through standard mutual inductor, obtains through electronic mutual inductor To digital output;Control work station produce synchronizing clock signals and export to digital transformer substation Synchronizing signal access point and the A/D being connected with standard mutual inductor of secondary singal transmission system adopt Sample device, the analog output of standard mutual inductor obtains hits after A/D sampler samples According to, and sending control work station to, the digital output input that electronic mutual inductor obtains is to number Word substation secondary signal transmission system, the joint of digitalized substation secondary signal transmission system Digital signal at some transmission test is to controlling work station, and parsing obtains resolving data, described Control work station described sampled data and described parsing data to carry out data point coupling, transmits and prolong Time calculate and display record.
Time-delay characteristic system safety testing device as above, the signal output part of three-phase controlled amplitude modulation power supply Signal input part with standard mutual inductor, electronic mutual inductor is connected respectively, standard mutual inductor Signal output part is connected with controlling work station by A/D sampler, the letter of electronic mutual inductor Number outfan is connected with the signal input part of combining unit.
Time-delay characteristic system safety testing device as above, controls work station by main control computer, host computer two Part composition, has worked in coordination with function.Described host computer machine includes device one processed and connects with controller one The instructional waveform generation module that connects, setting module, data analysis module, display module, complete Set, analyze and show function;Described main control computer includes controller two and is connected with controller two Digital signal reception module to be measured, synchronizing clock signals generation module, A/D sampler receive Module, completes synchronised clock generation, signal reception and analytical capabilities;Described controller one and institute State controller two connection.
Time-delay characteristic system safety testing device as above, described instructional waveform generation module, for sending out Going out instruction makes three-phase controlled amplitude modulation power supply output amplitude believe by the test of mechanical periodicity, frequency stable Number;
Described digital signal reception module to be measured, is used for receiving survey digitalized substation secondary signal The digital signal to be measured that transmission system node transmits, and obtain after the parsing of described digital signal to be measured To resolving data, then send the data analysis module to host computer by main control computer;
Described synchronizing clock signals generation module, is used for exporting synchronizing clock signals, and by described Synchronizing clock signals is concurrently accessed the synchronizing signal of digitalized substation secondary signal transmission system Access point (equipment such as combining units at different levels) and the A/D sampler being connected with standard mutual inductor, To ensure internal standard transformer sampling and the electronic type mutual inductance treating examining system through A/D sampler The stringent synchronization of device sampling;
Described A/D sampler receiver module, for receiving adopting from the output of A/D sampler Sample data, described sampled data sends the data analysis module to host computer by main control computer;
Described setting module, for realizing setting of the figure parameters to whole detecting system tester Fixed, described figure parameters includes the figure parameters such as tester time delay ζ t, cycle, amplitude;
Described data analysis module, for receiving the parsing from digital signal reception module to be measured Data and the sampled data from A/D sampler receiver module, carried out above two signal Data value comparison, corresponding data Point matching, delayed data counting statistics, show that maximum transmitted is prolonged Time Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and during system transfers Between difference wobble information;
Described display module, for showing the tables of data of transmission delay and and being drawn by trace-point method Standard mutual inductor sample waveform figure and number of test points are according to sample graph, and by above-mentioned maximum transmitting time delay Δtmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and the system transfers time Difference wobble information shows.
A kind of digitalized substation secondary signal transmission system time-delay characteristics method of testing, its feature It is to comprise the steps:
A. three-phase controlled amplitude modulation power supply generates amplitude according to the requirement controlling work station control instruction By the delay test signal that mechanical periodicity, frequency plot are controlled, and by described delay test signal Input to the input of standard mutual inductor and electronic mutual inductor;
B. described test signal is measured by standard mutual inductor, electronic mutual inductor, standard is mutual The analogue signal of sensor output is as standard signal;By electronic mutual inductor and through combining unit, During switch, Ethernet i.e. digitalized substation secondary signal transmission system, arbitrary node is defeated The digital signal gone out is as digital signal to be measured;
C. electronic mutual inductor input is analog quantity, is output as digital signal, and through optical fiber Digital signal is delivered to combining unit;Combining unit receives the number from electronic mutual inductor output Word signal, the frame format specified according to IEC61850-9-2 by above-mentioned digital signal is by electric parameters Digital signal delivers to intelligent power equipment I ED through switch and Ethernet;
D. choosing certain node in digitalized substation secondary signal transmission system is test point, Digital signal test point received is sent to control work station, exports by controlling work station Synchronizing clock signals accesses the synchronizing signal of digitalized substation secondary signal transmission system and accesses Point and the A/D sampler pulse signal that is connected with standard mutual inductor thus control its sampling, mark The standard signal of quasi-transformer output obtains sampled data after A/D sampler samples, and Input is to controlling work station;
After the most synchronized clock signal controls synchronized sampling, controlling work station will transmit to be measured Data first pass through IEC61850-9-2 data frame analyzing, obtain resolve data;
The most described control work station carries out data point to described sampled data and described parsing data Join, transmission delay calculates and display record.
Time-delay characteristics method of testing as above, described step f will be particularly as follows: data will be resolved It is separately stored in two internal storage locations with the sampled data of standard mutual inductor, and according to controlling work Make stand the sequential of clock log data, data value, the work station clock information of the time of reception;
In controlling work station, described sampled data and described parsing data are handled as follows:
According to time sequence information, stored sampled data is carried out according to sampling instant with resolving data Sequence, it is ensured that arrange according to sampling instant;
Comparison amplitude window is set, compares resolving the data data value amplitude with sampled data Right, determine the matching relationship resolving data with sampled data data value, window size is more than one Cycle;
The work station clock time calculating identical sampling time sequence data point respectively is poor, draws a series of The time difference at identical sampled data value moment strong point, and draw maximum time difference tmax, minimum time Between difference tmin, average time difference taver, time difference shake;
By above-mentioned calculated maximum time difference tmax, minimum time difference tmin, average time difference taverDeduct tester time delay ζ t and obtain the maximum transmitting time delay Δ t of transmission system to be measuredmax, Little transmission delay Δ tmin, average transmission time delay Δ taver:
Δtmax=tmax-ζt
Δtmin=tmin-ζt
Δtaver=taver-ζt
ζ t is tester time delay, including the time delay of device inner high speed A/D sampling, synchronised clock The response time of signal generating module and tested point data frame analyzing process time delay, can for fixing Measured value;
According to controlling work station clock signal, data and sampling will be resolved at same time domain coordinate Data carry out described point drawing, and by controlling the display module of work station by the waveform at test point Show with the waveform of test source output simultaneously, meanwhile, maximum by step e calculates gained Transmission delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and system Transmission time difference wobble information shows.
Have an advantage in that compared to conventional check system:
1. produce amplitude by three-phase controlled amplitude modulation power supply and press the survey of mechanical periodicity, frequency-invariant Trial signal, by the position of amplitude size mark cycle such that it is able to accurately judge numeral to be measured Signal and the corresponding relation of standardized digital signal, accurate discrimination digitalized substation secondary signal passes Time delay complete cycle of communication system, thus obtain accurate transmission delay.
2. data acquisition module is independent, by data acquisition and place in controlling work station Reason is carried out main control computer and host computer are asynchronous respectively, weakens the requirement to device hardware;Set up Data analysis module and display module, in that context it may be convenient to measure read latch;Meanwhile, work is controlled The internal output in work station synchronised clock, accesses and (includes merging list with system transfers circuit units to be measured The equipment such as unit) and the A/D sampler of standard mutual inductor end, trigger with identical times frequency sampling Pulse signal thus control its sampling, it is ensured that device internal standard transformer through A/D sample The stringent synchronization that the sampling of device and the electronic mutual inductor treating examining system are sampled.
3. the present invention is by contrast respective inner standard mutual inductor A/D sampled point and transmission system The clock information of signal circuit sampled point, determines internal A/D sampled data and transmission system electricity The sequential corresponding relation of minor mutual inductor sample, according to work station clock can accurate measure be each adopts The delayed data of sampling point, and add up maximum transmitting time delay Δ tmax, minimum transfer time delay Δ tmin、 Average transmission time delay Δ taver, the time-delay characteristics such as transmission time shake, it is possible to the most anti- Answer the time-delay characteristics of transmission system to be measured.
Input interface the most of the present invention digital signal reception to be measured module, compatible Ethernet interface And optical fiber interface, can be directly accessed combining unit to inter-exchange optical fiber export and switch Ethernet output, it is not necessary to additionally change.Can be to digitalized substation secondary signal transmission system The time-delay characteristics of (between combining unit output to intelligent power equipment) arbitrary node are surveyed Examination, simple, easy to operate, test result is accurate.
Accompanying drawing explanation
Fig. 1 is digitalized substation secondary signal transmission system time-delay characteristics of the present invention test dresses The structural representation put;
Fig. 2 is the electrical block diagram controlling work station in Fig. 1;
Fig. 3 is the electrical block diagram of three-phase controlled amplitude modulation power supply in Fig. 1;
Fig. 4 is the storage schematic diagram that the present invention exports amplitude-modulation coding wave datum;
Fig. 5 is the present invention Windowing data point coupling and time delay calculating schematic diagram;
Fig. 6 is digitalized substation secondary signal transmission system time-delay characteristics test side of the present invention The schematic flow sheet of method;
Fig. 7 is the amplitude-modulation coding ripple schematic diagram of the present invention.
In figure: 1 three-phase controlled amplitude modulation power supply, 2 standard mutual inductors, 3 electronic type mutual inductances Device, 4 control work station, 5 A/D samplers, 6 combining units, 7 synchronised clock letters Number, 8 switches, 9 Ethernets, 10 digitalized substation secondary signal transmission systems, 11 instructional waveform generation modules, 12 setting modules, 13 digital signal reception modules to be measured, 14 synchronizing clock signals generation modules, 15 A/D sampler receiver modules, 16 data are divided Analysis module, 17 display modules, 18 three-phase isolation transformers, 19 uncontrollable rectifier circuit, 20 filter circuits, 21 Three-phase SPWM inverter circuits.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out clear, It is fully described by.
Seeing Fig. 1, digitalized substation secondary signal transmission system time-delay characteristics of the present invention are tested Device includes three-phase controlled amplitude modulation power supply 1, standard mutual inductor 2, electronic mutual inductor 3, control Work station 4 processed, A/D sampler 5 and by combining unit 6, switch 8 and ether Net 9 forms digitalized substation secondary signal transmission system 10.Wherein digital transformer substation two The arbitrary node of secondary signal transmission system 10 can be as the outfan of digital signal to be measured.Three-phase The signal output part of controlled amplitude modulation power supply 1 respectively with standard mutual inductor 2, electronic mutual inductor 3 Signal input part connect, the signal output part of standard mutual inductor 2 pass through A/D sampler 5 Being connected with controlling work station 4, the signal output part of electronic mutual inductor 3 is believed with combining unit 6 Number input connects, and the arbitrary node of digitalized substation secondary signal transmission system 10 can be made Outfan for digital signal to be measured is connected with controlling work station 4.
Three-phase controlled amplitude modulation power supply 1 obtains energy from electrical network, receives from controlling work station 4 Instruction, output amplitude presses the test signal (as shown in Figure 7) of mechanical periodicity, frequency stable.
Refer to Fig. 3, A, B, C three-phase voltage through a three-phase isolation transformer 18, Power to described three-phase controlled amplitude modulation power supply 1.Described three-phase controlled amplitude modulation power supply 1 mainly includes Three parts: uncontrollable rectifier circuit 19, filter circuit 20, Three-phase SPWM inverter circuit 21. The main body of circuit is ac-dc-ac inverter circuit, and civil power achieves friendship through uncontrollable rectifier circuit 19 Flowing to the conversion of direct current, filter circuit 20 plays the effect of stable DC voltage.Described controlled tune Width power supply 1 output amplitude is with mechanical periodicity, and frequency stable is the test voltage of power frequency, current wave Shape, sees Fig. 7, and it is as follows that amplitude-modulated sinusoid produces process: first, control work station 4 according to The required sine wave produced sends coded command to three-phase controlled amplitude modulation power supply 1, and coding refers to Making essence is a series of coded pulses.It is 50Hz for frequency that diagram produces sinusoidal wave, initial width Value is the sine wave of 50V, and increases 25V, i.e. period 1 amplitude according to wave amplitude weekly For 50V, second round is 75V, and the period 3 is 100V ... mode carry out encode institute ?.
The test signal of described three-phase controlled amplitude modulation power supply 1 output obtains mould through standard mutual inductor 2 Analog quantity exports, and obtains digital output through electronic mutual inductor 3.The simulation of standard mutual inductor 2 Amount exports the standard signal after A/D sampler 5 is sampled as detection time delay, and inputs Control work station 4;The voltage and current digital signal that electronic mutual inductor 3 gathers is through processing After, it being sent to combining unit 6 by optical fiber, combining unit 6 is directly passed by point-to-point transmission Pass digital relay protection device or through being transferred to Ethernet 9 by switch 8, for number The intelligent power equipment such as Zi Hua transformer station wave recording device use.When controlling work station 4 output synchronization A/D sampler 5 and the transmission system signal to be measured of clock signal 7 to standard mutual inductor 2 end return Combining unit 6 etc. in road needs the device (i.e. synchronizing signal access point) of synchronised clock, with Time give the A/D sampler 5 that is connected with standard mutual inductor 2 of electronic mutual inductor 3 with phase respectively With times frequency sampling start pulse signal thus control its sampling, so that it is guaranteed that standard mutual inductor A/D digital sampled signal is strictly same with the digital sampled signal of system electronic formula transformer to be measured Step.
Referring to Fig. 2, described control work station 4 is made up of main control computer, host computer two parts, Work in coordination with function.Host computer machine includes controller one and the instructional waveform being connected with controller one Generation module 11, setting module 12, data analysis module 16, display module 17, complete to set Determine, analyze and show function;Described main control computer includes controller two and is connected with controller two Digital signal reception module 13 to be measured, synchronizing clock signals generation module 14, A/D sampler Receiver module 15, completes synchronised clock generation, signal reception and analytical capabilities.
Described instructional waveform generation module 11, is used for sending instruction and makes three-phase controlled amplitude modulation power supply 1 Output amplitude presses the test signal of mechanical periodicity, frequency stable;
Described digital signal reception module 13 to be measured is used for receiving survey digitalized substation secondary letter Number transmission system node transmit digital signal to be measured, and will described digital signal to be measured parsing after Obtain resolving data, then send the data analysis module 16 to host computer by main control computer;
Described synchronizing clock signals generation module 14, is used for exporting synchronizing clock signals, and will Described synchronizing clock signals is concurrently accessed the same of digitalized substation secondary signal transmission system 10 Step signal access point (including the equipment such as combining unit) and the A/D being connected with standard mutual inductor 2 Sampler 5, it is ensured that device internal standard transformer 2 through A/D sampler 5 sampling with treat The stringent synchronization of electronic mutual inductor 3 sampling of examining system;
A/D sampler receiver module 15, for receiving adopting from A/D sampler 5 output Sample data, described sampled data sends the data analysis module 16 to host computer by main control computer;
Described setting module 12 is for realizing whole detecting system tester time delay ζ t, week The setting of the figure parameters such as phase, amplitude;
Described data analysis module 16, for receiving from digital signal reception module 13 to be measured Parsing data and from the sampled data of A/D sampler receiver module 15, by above two Signal carries out the processes such as data value comparison, corresponding data Point matching, delayed data counting statistics, Draw maximum transmitting time delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, And system transfers time difference wobble information;
Described display module 16, for showing the tables of data of transmission delay and and passing through trace-point method Draw standard mutual inductor sample waveform figure and number of test points according to sample graph, and by above-mentioned maximum transmitted Time delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and system transfers Time difference wobble information shows.
The main control computer controlling work station 4 receives from standard mutual inductor 2 through A/D sampling simultaneously Digital signal (i.e. sampled data) after device 5 sampling and digitalized substation secondary signal to be measured The digital signal at test that transmission system node sends, and the number that will transmit to be measured According to first passing through IEC61850-9-2 data frame analyzing, obtain resolve data, will resolve data with The sampled data of standard mutual inductor 2 is stored into two internal storage locations respectively, and record data time The information such as sequence, data value, the work station clock of the time of reception, send to and control work station 4 Host computer, in host computer to gained standard mutual inductor 2 through A/D sample after numeral letter The signal data at number (i.e. sampled data) and above-mentioned place to be tested processes:
According to time sequence information, stored sampled data is carried out according to sampling instant with resolving data Sequence.There is not uncertain network and prolong in the digital signal after wherein standard mutual inductor A/D samples Time, its time sequence information i.e. sequential of the time of reception, the signal data at place to be tested is owing to existing not Determine network delay, be likely to result in reception sequential and differ with sampling time sequence, therefore need to be according to its number Carrying out sequential arrangement according to sequential numbering in frame to store, its form such as Fig. 4, " sequential " represents data The sequential in point sampling moment, " data value " is the voltage of data sampling, current value, " moment " table Show the work station clock controlled when work station 4 receives these data.
Comparison amplitude window is set, sampled data and the data value resolving data is compared, Determining the matching relationship resolving data with sampled data data value, window size is preferably greater than a week Phase, it is ensured that the sampling number evidence that comparison is enough obtains matching relationship accurately;
The work station clock time calculating identical sampling time sequence data point respectively is poor, as it is shown in figure 5, In whole comparison window, standard mutual inductor A/D sampled data resolves data with place to be measured Data value match, shows that both match at data point, i.e. standard mutual inductor A/D sampled data Sequential 1 resolves the data match after data time sequence n with place to be measured, draws series of identical The time difference Δ t of sampling instant data point, i.e. Δ t=Tn-tn, TnData are resolved for place to be measured Markers, tnFor standard mutual inductor A/D sampled data markers.
The time difference at statistical number strong point, can draw maximum time difference tmax, minimum time difference tmin、 Average time difference taver, time difference shake (the neighbouring sample point time interval time of reception deviation adopt The size of sample periodic quantity);
By above-mentioned calculated maximum time difference tmax, minimum time difference tmin, average time difference taverDeduct tester time delay ζ t and obtain the maximum transmitting time delay Δ t of transmission system to be measuredmax, Little transmission delay Δ tmin, average transmission time delay Δ taver:
Δtmax=tmax-ζt
Δtmin=tmin-ζt
Δtaver=taver-ζt
Wherein ζ t is tester time delay, including the time delay of device inner high speed A/D sampling, synchronizes The response time of clock signal generation module 14 and tested point data frame analyzing process time delay, Can measured value for fixing.
According to controlling work station clock signal, data and sampling will be resolved at same time domain coordinate Data carry out described point drawing, and by controlling the display module of work station by the waveform at test point Show with the waveform of test source output simultaneously, meanwhile, maximum by step e calculates gained Transmission delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and system Transmission time difference wobble information shows.
Seeing Fig. 6, workflow includes: configuration testing loop, system go out to initialize, scene Detection, generation monitoring result etc..First, Access Control work station 4, connect circuit, close After power source, system is debugged, debug complete, to the numeral letter to be measured controlling work station 4 Number receiver module 13, A/D sampler receiver module 15, data analysis module 16, display mould Block 17 initializes, and carries out the isoparametric setting of instructional waveform by setting module 12 simultaneously. Initialize and after being provided with, power turn-on, system be automatically performed controlled pulsewidth waveform generate, Signal synchronous collection and the relative analysis of waveform, determine both correspondences according to the size of amplitude Relation, determines that the A/D sampled data of standard mutual inductor resolves the corresponding pass of data with place to be measured System, is then controlling the data analysis module 16 of work station 4 according to corresponding relation, is calculating Big transmission delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and be System transmission time difference wobble information, draws the transmission delay characteristic at place to be measured, passes through display module Display output.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also Being not limited to this, any those skilled in the art of belonging to are at the technology model that the invention discloses In enclosing, the change that can readily occur in or replacement, all should contain within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with scope of the claims.

Claims (2)

1. a digitalized substation secondary signal transmission system time-delay characteristic system safety testing device, bag Include standard mutual inductor (2), electronic mutual inductor (3) and by combining unit (6), exchange The digitalized substation secondary signal transmission system (10) that machine (8) and Ethernet (9) form, It is characterized in that: also include three-phase controlled amplitude modulation power supply (1), A/D sampler (5) and control Work station processed (4), described three-phase controlled amplitude modulation power supply (1) is for receiving from controlling work Standing the command pulse of (4), output amplitude presses the delay test letter of mechanical periodicity, frequency stable Number, described delay test signal obtains analog output, through electronics through standard mutual inductor (2) Formula transformer (3) obtains digital output;Control work station (4) and produce synchronizing clock signals And export the synchronizing signal to digitalized substation secondary signal transmission system (10) and connect (7) Access point and the A/D sampler (5) being connected with standard mutual inductor (2), standard mutual inductor (2) Analog output after A/D sampler (5) is sampled, obtain sampled data, and will sampling Data export to controlling work station (4), the digital output that electronic mutual inductor (3) obtains Input is to digitalized substation secondary signal transmission system (10), through digital transformer substation two Secondary signal transmission system (10) transmits, in the output of Node extraction to be measured digital signal to be measured to control Work station processed (4), obtains resolving data, described control work controlling work station (4) parsing Standing, (4) carry out data point coupling to described sampled data and described parsing data, transmission is prolonged Time calculate and display record;
The signal output part of three-phase controlled amplitude modulation power supply (1) respectively with standard mutual inductor (2), The signal input part of electronic mutual inductor (3) connects, the signal output of standard mutual inductor (2) Hold and be connected with controlling work station (4) by A/D sampler (5), electronic mutual inductor (3) Signal output part be connected with the signal input part of combining unit (6), digital transformer substation two Secondary signal transmission system (10) node signal to be tested outfan connects with controlling work station (4) Connect;
Control work station (4) to be made up of main control computer, host computer two parts, work in coordination with function, Described host computer includes controller one and the instructional waveform generation module being connected with controller one (11), setting module (12), data analysis module (16), display module (17), complete Set, analyze and show function;Described main control computer includes controller two and is connected with controller two Digital signal reception module (13) to be measured, synchronizing clock signals generation module (14), A/D Sampler receiver module (15), completes synchronised clock generation, signal reception and analytical capabilities; Described controller one is connected with described controller two;
Described instructional waveform generation module (11), is used for sending instruction and makes three-phase controlled amplitude modulation electricity Source (1) output amplitude presses the test signal of mechanical periodicity, frequency stable;
Described digital signal reception module (13) to be measured, is used for receiving survey digital transformer substation two The digital signal to be measured that secondary signal transmission system node transmits, and by described digital signal solution to be measured Obtain resolving data after analysis, then send the data analysis module to host computer by main control computer (16);
Described synchronizing clock signals generation module (14), is used for exporting synchronizing clock signals, and Described synchronizing clock signals is concurrently accessed digitalized substation secondary signal transmission system (10) Synchronizing signal access point and the A/D sampler (5) that is connected with standard mutual inductor (2), with Ensure internal standard transformer (2) sampling and the electricity treating examining system through A/D sampler (5) The synchronization that minor transformer (3) is sampled;
Described A/D sampler receiver module (15), for receiving from A/D sampler (5) The sampled data of output, described sampled data sends the data analysis to host computer by main control computer Module (16);
Described setting module (12), joins for realizing the coefficient to whole detecting system tester The setting of number, described figure parameters includes tester time delay ζ t, cycle, amplitude;
Described data analysis module (16), for receiving from digital signal reception module to be measured (13) parsing data and the sampled data from A/D sampler receiver module (15), Parsing data and sampled data are carried out data value comparison, corresponding data Point matching, delayed data Counting statistics, draws maximum transmitting time delay Δ tmax, minimum transfer time delay Δ tmin, average transmission Time delay Δ taver, and system transfers time difference wobble information;
Described display module (17), for showing the tables of data of transmission delay, is drawn by trace-point method Standard mutual inductor sample waveform figure and number of test points are according to sample graph, and by above-mentioned maximum transmitting time delay Δtmax, minimum transfer time delay Δ tmin, average transmission time delay Δ taver, and the system transfers time Difference wobble information shows.
2. a digitalized substation secondary signal transmission system time-delay characteristics method of testing, its It is characterised by comprising the steps:
A. three-phase controlled amplitude modulation power supply (1) is according to the requirement controlling work station (4) control instruction Generate amplitude and press the delay test signal that mechanical periodicity, frequency plot are controlled, and by described time delay Test signal inputs to standard mutual inductor (2) and the input of electronic mutual inductor (3);
B. described delay test is measured by standard mutual inductor (2), electronic mutual inductor (3) Signal, the analogue signal exported by standard mutual inductor (2) is as standard signal;By electronic type Transformer (3) and during combining unit (6), switch (8), Ethernet (9) appoint The digital signal of meaning node output is as digital signal to be measured;
C. electronic mutual inductor (3) input is analog quantity, is output as digital signal, and passes through Digital signal is delivered to combining unit (6) by optical fiber;Combining unit (6) receives from electronic type The digital signal that transformer (3) exports, advises above-mentioned digital signal according to IEC61850-9-2 Electric parameters digital signal is delivered to intelligence through switch (8) and Ethernet (9) by fixed frame format Can electrical equipment IED;
D. certain node in digitalized substation secondary signal transmission system (10) is chosen for surveying Pilot, digital signal test point received is sent to control work station (4), by controlling Work station (4) output synchronizing clock signals (7) accesses the transmission of digitalized substation secondary signal Synchronizing signal access point and the A/D being connected with standard mutual inductor (2) of system (10) sample Device (5) pulse signal thus control its sampling, the standard signal that standard mutual inductor (2) exports After A/D sampler (5) is sampled, obtain sampled data, and input to controlling work station (4);
The most synchronized clock signal (7) controls after synchronized sampling, and controlling work station (4) will be from The data that place to be measured is transmitted first pass through IEC61850-9-2 data frame analyzing, obtain resolving data;
The most described control work station (4) carries out data to described sampled data and described parsing data Point matching, transmission delay calculate and display record;
Described step f is particularly as follows: incite somebody to action the sampled data resolving data with standard mutual inductor (2) It is separately stored in two internal storage locations, and according to controlling the clock log number of work station (4) According to sequential, data value, the work station clock information of the time of reception;
In controlling work station (4), described sampled data and described parsing data are located as follows Reason:
According to time sequence information, stored sampled data is carried out according to sampling instant with resolving data Sequence, it is ensured that arrange according to sampling instant;
Comparison amplitude window is set, compares resolving the data data value amplitude with sampled data Right, determine the matching relationship resolving data with sampled data data value, window size is more than one Cycle;
The work station clock time calculating identical sampling time sequence data point respectively is poor, draws a series of The time difference at identical sampled data value moment strong point, and draw maximum time difference tmax, minimum time Between difference tmin, average time difference taver, time difference shake;
By above-mentioned calculated maximum time difference tmax, minimum time difference tmin, average time difference taverDeduct tester time delay ζ t and obtain the maximum transmitting time delay Δ t of transmission system to be measuredmax, Little transmission delay Δ tmin, average transmission time delay Δ taver:
Δtmax=tmax-ζt
Δtmin=tmin-ζt
Δtaver=taver-ζt
ζ t is tester time delay, including the time delay of device inner high speed A/D sampling, synchronised clock The response time of signal generating module and tested point data frame analyzing process time delay, can for fixing Measured value;
According to control work station (4) clock signal, same time domain coordinate will resolve data with Sampled data carries out described point drawing, and by controlling the display module (16) of work station (4) The waveform that waveform at test point and test source export is shown simultaneously, meanwhile, by step E calculates gained maximum transmitting time delay Δ tmax, minimum transfer time delay Δ tmin, average transmission time delay Δtaver, and system transfers time difference wobble information shows.
CN201410062577.5A 2014-02-24 2014-02-24 Digitalized substation secondary signal transmission system time-delay characteristics test device and method CN103777104B (en)

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