CN105021909A - Automatic detection method for digital electric energy quality monitoring terminal and system thereof - Google Patents
Automatic detection method for digital electric energy quality monitoring terminal and system thereof Download PDFInfo
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Abstract
The invention provides an automatic detection method for a digital electric energy quality monitoring terminal and a system thereof. The method comprises the steps that parameter information inputted by users is acquired; detection signals and script information are generated according to the parameter information; format conversion is performed on the detection signals so that the detection signals meeting the international electrotechnical commission IEC61850-9-2 requirement are obtained; the detection signals meeting the IEC61850-9-2 requirement are transmitted to the digital electric energy quality monitoring terminal; sampling is performed on the detection signals by the digital electric energy quality monitoring terminal and an MMS message is outputted; and the detection result of the digital electric energy quality monitoring terminal is confirmed according to the MMS message, the script information and the detection signals. Detection of the equipment state of the digital electric energy quality analysis terminal is realized. Meanwhile, a detection loop is formed so as to be more intelligent and automatic, and tedious manual recording and comparison can be omitted.
Description
Technical field
The present invention is about the detection technique of the monitoring equipment in safe operation of power system, particularly about the detection technique of the transformer station in safe operation of power system with digital electric power quality monitoring terminal, be a kind of automatic testing method and system of digital electric power quality monitoring terminal concretely.
Background technology
In recent years, the demand of the digital number formula electric energy quality monitoring terminal of whole nation each province grows with each passing day, but differ due to the level of the manufacturer of digital number formula electric energy quality monitoring terminal, the difference problem such as the change of synchronization accuracy, high/low stroboscopic, voltage dip timi requirement, multiparameter consistance may be there is in the digital number formula electric energy quality monitoring terminal of production.
Substantially be completed one by one by manual in laboratory to the detection of digitizing digital electric power quality monitoring terminal in prior art, and the manual inspection in laboratory can only be spot-check or transfer passage numerical value wherein with computing machine, comprehensively can not check the indices of packet, complete technical report can not be provided for manufacturer, also can have influence on the true reflection that electric network terminal detects data simultaneously.
At present, domestic also not about the automatic detection scheme of digital number formula electric energy quality monitoring terminal, IEC standard simply show basic test flow chart and general framework, does not provide concrete detection method.
Therefore, how digital electric energy quality monitoring terminal is detected, promote detection efficiency, ensure the reliability of testing result, improve consistance and accuracy that device tests under complicated quality of power supply environment at the scene, to realize many inspections, fast inspection, excellent inspection be this area technical barrier urgently to be resolved hurrily.
Summary of the invention
In order to solve the manual technical matters that truly can not reflect electric network terminal detection data detecting digital electric power quality monitoring terminal one by one and cause in prior art, the invention provides a kind of automatic testing method and system of digital electric power quality monitoring terminal, by sending the digital signal of satisfactory simulated intelligence transformer station to detected equipment, by the quality of power supply event MMS message that detected digital electric power quality analysis terminal is passed back, it is analyzed, detection system is made to form loop, compare with the original signal sent, thus achieve the detection of the equipment state of digital electric power quality analysis terminal, form measure loop simultaneously, more intelligent automaticization, eliminate the loaded down with trivial details of manual record comparison.
An object of the present invention is, provides a kind of automatic testing method of digital electric power quality monitoring terminal, comprising: the parameter information gathering user's input; Detection signal, script information is generated according to described parameter information; Described detection signal is carried out format conversion, obtains the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement; The detection signal that the described IEC61850-9-2 of meeting requires is sent to digital electric power quality monitoring terminal; Described digital electric power quality monitoring terminal is sampled to described detection signal, and exports MMS message; The testing result of described digital electric power quality monitoring terminal is determined according to described MMS message, script information and described detection signal.
An object of the present invention is, provide a kind of automatic checkout system of digital electric power quality monitoring terminal, described system specifically comprises host computer, relay-protection tester, photoelectric commutator and tested digital electric power quality monitoring terminal, wherein, described host computer, for gathering the parameter information of user's input, generating detection signal, script information according to described parameter information, and described detection signal is sent to relay-protection tester; Described relay-protection tester, for described detection signal is carried out format conversion, obtain the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement, and the detection signal that the described IEC61850-9-2 of meeting requires is sent to described digital electric power quality monitoring terminal; Described digital electric power quality monitoring terminal, for sampling to the detection signal meeting IEC61850-9-2 requirement, and is sent to described host computer by photoelectric commutator by MMS message; Described host computer, for determining the testing result of described digital electric power quality monitoring terminal according to described MMS message, script information and described detection signal.
Beneficial effect of the present invention is, provide a kind of automatic testing method and system of digital electric power quality monitoring terminal, by sending the digital signal of satisfactory simulated intelligence transformer station to detected equipment, by the quality of power supply event MMS message that detected digital electric power quality analysis terminal is passed back, it is analyzed, detection system is made to form loop, compare with the original signal sent, thus evaluation is made to the equipment state of detected digital electric power quality analysis terminal, not only solve the manual technical matters that truly can not reflect electric network terminal detection data detecting digital electric power quality monitoring terminal one by one and cause in prior art, and the testing making original manual operations need the time to complete a table apparatus shortens to and completes multiple stage device within several several hours and detect, effective solution quality of power supply terminal detecting device detects inefficient, the problem of low accuracy.
For above and other object of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of the embodiment one of the automatic testing method of a kind of digital electric power quality monitoring terminal that Fig. 1 provides for the embodiment of the present invention;
The process flow diagram of the embodiment two of the automatic testing method of a kind of digital electric power quality monitoring terminal that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the particular flow sheet of the step S102 in Fig. 1;
Fig. 4 is the particular flow sheet of the step S103 in Fig. 1;
The schematic diagram of the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 5 provides for the embodiment of the present invention;
The structured flowchart of the embodiment one of host computer in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 6 provides for the embodiment of the present invention;
The structured flowchart of relay-protection tester in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 7 provides for the embodiment of the present invention;
Fig. 8 is the process flow diagram of program control digital standard source in specific embodiment;
When Fig. 9 is non-complete matching there is the schematic diagram of interference in adjacent signals;
When Figure 10 is non-complete matching there is not the schematic diagram of interference in adjacent signals;
Figure 11 is the sequential chart of detection signal.
The structured flowchart of the embodiment two of host computer in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Figure 12 provides for the embodiment of the present invention;
Figure 13 is the particular flow sheet of the step S106 in Fig. 1;
Figure 14 is the structured flowchart of testing result determination module in the host computer of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The object of this invention is to provide a kind of automatic testing method and system of digital electric power quality monitoring terminal, can increase work efficiency, the testing making original manual operations need the time to complete a table apparatus shortens within several several hours and completes the detection of multiple stage device.The exploitation of the technical program completes and greatly will promote the domestic development to quality of power supply terminal detecting device detection technique, effectively solves quality of power supply terminal detecting device and detects problem that is inefficient, low accuracy.
As shown in Figure 1, as shown in Figure 1, in embodiment one, described method comprises the particular flow sheet of the automatic testing method of a kind of digital electric power quality monitoring terminal that the present invention proposes:
S101: the parameter information gathering user's input.
The automatic testing method of digital electric power quality monitoring terminal provided by the invention can detect 11 indexs, the parameter information of different Testing index user inputs is different, described parameter information comprises voltage, electric current, frequency, phase angle, overtone order, voltage m-Acetyl chlorophosphonazo aberration rate, voltage harmonic aberration rate, electric current m-Acetyl chlorophosphonazo content, the temporary range of decrease degree of current harmonic content, falls duration, undulate quantity, flicker frequency temporarily, as shown in table 1.
Table 1
In a particular embodiment, this step realizes by host computer, is gathered the parameter information of user's input by host computer.
S102: generate detection signal, script information according to described parameter information.Fig. 3 is the particular flow sheet generating detection signal according to described parameter information, and as shown in Figure 3, this step specifically comprises:
S301: generate simulating signal according to described parameter information;
S302: dispersion number mode convertion is carried out to described simulating signal, obtains detection signal.
Also be, in a particular embodiment, host computer generates corresponding simulating signal according to parameter information, according to IEC61850-9-2, the dispersion number mode convertion carrying out 80 points/cycle, 200 points/cycle, 256 points/cycle is required to simulating signal, is stored in .dat file with float data type and sampled value is transmitted.Number of significant digit is six.The channel number of host computer required for user, set up corresponding passage mapping relations, provide the parameter of sampled value controll block mark SVID (being made up of the logical device name in merge cells model, logic node name and the cascade of control name), application table knowledge APPID, physical address MAC.By RJ-45 interface, host computer, the mapping of .dat file and passage and configuration, utilizes ICP/IP protocol to write relay-protection tester.As shown in Figure 8.
Specific as follows according to described parameter information generation script information:
The parameter information of user's input in step 101, a series of script information is defined in host computer inside, the parameter information that script information is arranged for storing user, comprises frequency test parameter, electric current and voltage test bias parameter, three-phase imbalance test parameter, stable state stress_responsive genes parameter, ability in sampling test parameter, rises sharply and fall test parameter and flickering and voltage fluctuation test parameter temporarily.All signal parameters that single is tested by host computer unification save as a character string, and define the storage format of each signal parameter of ring in character string, and concrete regulation is as follows:
1) separate with " | " between signal parameter and between adjacent signals parameter;
2) separate with ", " between the internal parameters of individual signals;
3) first parameter of each signal deposits the index of category of test, " 1 " represents frequency test, " 2 " representative voltage current deviation is tested, " 3 " represent three-phase imbalance test, " 4 " represent stable state stress_responsive genes, " 5 " represent ability in sampling test, and " 6 " representative rises sharply and falls test temporarily, and " 7 " represent flickering and voltage fluctuation test etc.
4) signal parameter is deposited successively according to index.
As shown in Figure 1, the method also comprises:
S103: described detection signal is carried out format conversion, obtains the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement.Fig. 4 is the particular flow sheet of step S103, and as shown in Figure 4, this step specifically comprises:
S401: described detection signal is stored with IEEE (Institute of Electrical and Electric Engineers) floating number form;
S402: the sampled value determining described detection signal;
S403: be stored to SMV (sampled value) message after a sub-value by described sampled value conversion, described SMV message is the detection signal meeting IEC61850-9-2 and require.
In a particular embodiment; this step realizes by digital standard source (such as relay-protection tester); be stored in DSP by the discrete data of host computer with IEEE floating number form, calculating each point sampled value as digital standard source and convert is that a sub-value is stored in SMV message.The per mille of electric current secondary ratings is obtained current channel coefficient divided by electric current ratings, one of percentage of voltage secondary ratings is obtained voltage channel coefficient divided by voltage ratings, and in SMV message, byte correspondence is multiplied and obtains electric current and voltage sampled value.The sampling precision of sample rate current is 1mA, and the sampling precision of sampled voltage is 10mV, and the message conversion being accomplished to SMV in digital standard source is sent to tested device.
In the present invention, described to meet detection signal that IEC61850-9-2 requires be front 75% effective, rear 25% invalid signal, 4 minutes altogether, mainly based on following consideration:
Cannot align thus the situation causing sampled value invalid with detection signal for the sampling time, as adjacent signals when Fig. 9 is non-complete matching exists the schematic diagram of interference, when Figure 10 is non-complete matching there is not the schematic diagram of interference in adjacent signals.Before test signal, inserted value is the invalid signals of zero, the sequential chart of the test signal effective value duration, to be 6-10s, Figure 11 be detection signal.
Sample for avoiding adjacent signals and disturb, between test signal, the long value such as insertion and its complete signal is the invalid signals of zero, makes sampled value effective.
Can be obtained by Figure 10; when monitoring device sampling period and digital standard source (i.e. relay-protection tester) output signal misplace among a small circle; still can avoid the mutual interference between adjacent signals; and the collection that the monitored device of test signal is complete can be ensured; thus effectively ensuring accuracy and the availability of sampled data, the detection sequence constructed thus just can realize the automatic detection of continuous signal.
Need to further illustrate, rising sharply, it is different with " 3 seconds effective values " data recording fashion from the recording mode of voltage flicker signal in electric energy quality monitoring terminal to fall signal temporarily, is using event as record.The maximum duration of the event of falling temporarily that rises sharply is 60 seconds, considers the program control response time of ramp-down time, ramp up time, adjacent the rise sharply time interval between falling temporarily and digital standard source, and default setting rises sharply, and to fall signal length be temporarily 80 seconds.The record period of voltage flicker event in equipment for monitoring power quality is 10 minutes, in order to ensure that monitoring device can completely records each flickering event, the length of flickering signal is at least 20 minutes, consider the program control response time of digital standard source, default setting voltage flicker signal length is 1220 seconds.
As shown in Figure 1, this step also comprises:
S104: the detection signal that the described IEC61850-9-2 of meeting requires is sent to digital electric power quality monitoring terminal;
S105: described digital electric power quality monitoring terminal is sampled to described detection signal, and exports MMS message.Namely tested electric energy quality monitoring terminal, returns to host computer by IEC61850 agreement, has IEC61850 client application to resolve MMS (industry manufactures the specification of message) message, form closed-loop system inside host computer.
S106: described MMS message, script information and described detection signal are compared, determines the testing result of described digital electric power quality monitoring terminal.Figure 13 is the particular flow sheet of step S106, and as shown in Figure 13, this step specifically comprises:
S501: the MMS message described in parsing;
S502: extract minute data in the MMS message analytically;
S503: extract first non-vanishing moment from described minute data, be called for the first moment;
S504: the first described moment is added 4 minutes, obtained for the second moment;
S505: determine the power quality index value that described second moment is corresponding according to described script information, power quality index value corresponding to described second moment is the measured value of described digital electric power quality monitoring terminal.
Here power quality index refers to, a certain item test that user does, such as frequency departure test, although have voltage, electric current, frequency inside the parameter that user is arranged, it is just passable that index only closes frequency of heart, and need not be concerned about voltage, electric current, therefore desired value, just refers to frequency values.The parameter that user inputs, a series of script information is defined in program inside, test signal parameter, quality of power supply classification that script information is arranged for storing user, all signal parameters that single is tested are saved as a character string, and first parameter of each signal deposits the index of category of test.After the first moment was found, according to script information, being also just aware of the classification of second test signal, searching the desired value in the second moment under returned packet respective classes, is exactly power quality index value corresponding to the second moment.
S506: described detection signal and described measured value are compared, judges whether described digital electric power quality monitoring terminal meets IEC standard, generates testing result.
Also namely, in a particular embodiment, host computer returned packet is resolved.Extract the minute data of standard signal, search the minute data of voltage indexes, from first non-vanishing moment, the basis of carving at this moment adds four minutes successively, and extract the value of corresponding power quality index, as the measured value of the tested device that a certain item is tested.
After obtaining the measured value of tested device, detection signal and described measured value being compared, is the actual P of monitoring terminal record according to the precision of regulation in " electric energy quality on-line monitoring device technical manual " (QGDW-10-J393-2009)
stNthe difference of value (i.e. measured value) and standard P st value (i.e. detection signal) is to the number percent of standard P st value, and accuracy computation formula is
the precision of power quality index value is p%, and the precision of digital standard source flickering is q%, and revised error range is
The i.e. actual P of digital electric power quality monitoring terminal record
stNthe difference of value and standard P st value to the number percent of standard P st value, can be thought that digital electric power quality monitoring terminal meets IEC standard, namely show Contemporary Digital formula electric energy quality monitoring terminal and meet IEC standard in testing result in error range.
The process flow diagram of the embodiment two of the automatic testing method of a kind of digital electric power quality monitoring terminal that Fig. 2 provides for the embodiment of the present invention, as shown in Figure 2, in embodiment two, step S201 to S206 is identical with the step S101 to S106 in embodiment one, and the method also comprises:
S207: generate examining report according to described testing result.In examining report, evaluation is made to the precision of equipment under test.
As above the automatic testing method of digital electric power quality monitoring terminal provided by the invention is, by sending the digital signal of program-controlled satisfactory simulated intelligence transformer station to detected equipment, by the quality of power supply event MMS message that detected digital electric power mass-synchrometer is passed back, it is analyzed, detection system is made to form loop, compare with the original signal sent, thus evaluation is made to the equipment state of detected digital electric power mass-synchrometer.This set of detection method solves the raw digital signal in the past sent can not arrange program control shortcoming, forms measure loop, more intelligent automaticization simultaneously, eliminates the loaded down with trivial details of manual record comparison.Meanwhile, on the basis of power quality index in the past, add 10 cycles, successional detection, more comprehensively can make evaluation to equipment state.
The present invention also proposes a kind of automatic checkout system of digital electric power quality monitoring terminal; Fig. 5 is the structured flowchart of this system; as shown in Figure 5; described system comprises host computer 100, relay-protection tester 200, photoelectric commutator 300 and tested digital electric power quality monitoring terminal 400; as shown in Figure 5, detection system of the present invention can detect multiple stage digital electric power quality monitoring terminal simultaneously.
Wherein, host computer 100, for gathering the parameter information of user's input, generating detection signal according to described parameter information, and described detection signal is sent to relay-protection tester 200.
The automatic testing method of digital electric power quality monitoring terminal provided by the invention can detect 11 indexs, the parameter information of different Testing index user inputs is different, described parameter information comprises voltage, electric current, frequency, phase angle, overtone order, voltage m-Acetyl chlorophosphonazo aberration rate, voltage harmonic aberration rate, electric current m-Acetyl chlorophosphonazo content, the temporary range of decrease degree of current harmonic content, falls duration, undulate quantity, flicker frequency temporarily, as shown in table 1.
Relay-protection tester 200; for described detection signal is carried out format conversion; obtain the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement, and the detection signal that the described IEC61850-9-2 of meeting requires is sent to described digital electric power quality monitoring terminal.In other embodiments of the present invention, relay-protection tester also realizes by other digital standard sources.
Digital electric power quality monitoring terminal 400, for sampling to the detection signal meeting IEC61850-9-2 requirement, and is sent to described host computer by photoelectric commutator 300 by MMS message.The testing result of standard signal is returned to PC main frame with the form of MMS message by namely tested quality of power supply terminal, compares with primary standard signal, realizes closed loop operation.
Described host computer 100, also comprises:
Testing result determination module 105, for described MMS message and described detection signal being compared, determines the testing result of described digital electric power quality monitoring terminal.
The structured flowchart of host computer in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 6 provides for the embodiment of the present invention, as shown in Figure 6, host computer 100 specifically comprises:
Parameter information acquisition module 101, for gathering the parameter information of user's input;
Simulating signal generation module 102, for generating simulating signal, script information according to described parameter information;
D/A converter module 103, for carrying out dispersion number mode convertion to described simulating signal, obtains detection signal;
Signal transmitting module 104, for being sent to relay-protection tester by described detection signal.
Also be, in a particular embodiment, host computer generates corresponding simulating signal according to parameter information, according to IEC61850-9-2, the dispersion number mode convertion carrying out 80 points/cycle, 200 points/cycle, 256 points/cycle is required to simulating signal, is stored in .dat file with float data type and sampled value is transmitted.Number of significant digit is six.The channel number of host computer required for user, set up corresponding passage mapping relations, provide the parameter of sampled value controll block mark SVID (being made up of the logical device name in merge cells model, logic node name and the cascade of control name), application table knowledge APPID, physical address MAC.By RJ-45 interface, host computer, the mapping of .dat file and passage and configuration, utilizes ICP/IP protocol to write relay-protection tester.As shown in Figure 8.
Also be, in a particular embodiment, host computer generates corresponding simulating signal according to parameter information, according to IEC61850-9-2, the dispersion number mode convertion carrying out 80 points/cycle, 200 points/cycle, 256 points/cycle is required to simulating signal, is stored in .dat file with float data type and sampled value is transmitted.Number of significant digit is six.The channel number of host computer required for user, set up corresponding passage mapping relations, provide the parameter of sampled value controll block mark SVID (being made up of the logical device name in merge cells model, logic node name and the cascade of control name), application table knowledge APPID, physical address MAC.By RJ-45 interface, host computer, the mapping of .dat file and passage and configuration, utilizes ICP/IP protocol to write relay-protection tester.As shown in Figure 8.
Specific as follows according to described parameter information generation script information:
The parameter information of user's input, a series of script information is defined in host computer inside, the parameter information that script information is arranged for storing user, comprises frequency test parameter, electric current and voltage test bias parameter, three-phase imbalance test parameter, stable state stress_responsive genes parameter, ability in sampling test parameter, rises sharply and fall test parameter and flickering and voltage fluctuation test parameter temporarily.All signal parameters that single is tested by host computer unification save as a character string, and define the storage format of each signal parameter of ring in character string.
Testing result determination module 105, for determining the testing result of described digital electric power quality monitoring terminal according to described MMS message, script information and described detection signal.
The structured flowchart of relay-protection tester in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 7 provides for the embodiment of the present invention, as shown in Figure 7, relay-protection tester 200 specifically comprises:
Memory module 201, for storing described detection signal with IEEE floating number form;
Sampled value determination module 202, for determining the sampled value of described detection signal;
Conversion module 203, for being be stored to SMV message after a sub-value by the conversion of described sampled value, described SMV message is the detection signal meeting IEC61850-9-2 and require;
Signal transmitting module 204, is sent to described digital electric power quality monitoring terminal for the detection signal required by the described IEC61850-9-2 of meeting.
The discrete data of host computer is stored in DSP with IEEE floating number form by relay-protection tester, and calculating each point sampled value as digital standard source and convert is that a sub-value is stored in SMV message.The per mille of electric current secondary ratings is obtained current channel coefficient divided by electric current ratings, one of percentage of voltage secondary ratings is obtained voltage channel coefficient divided by voltage ratings, and in SMV message, byte correspondence is multiplied and obtains electric current and voltage sampled value.The sampling precision of sample rate current is 1mA, and the sampling precision of sampled voltage is 10mV, and the message conversion being accomplished to SMV in digital standard source is sent to tested device.
In the present invention, described to meet detection signal that IEC61850-9-2 requires be front 75% effective, rear 25% invalid signal, 4 minutes altogether.
Figure 14 is the structured flowchart of testing result determination module 105 in the host computer of the embodiment of the present invention, and as shown in Figure 14, testing result determination module 105 specifically comprises:
Resolution unit 1051, for resolving described MMS message;
Minute data extraction unit 1052, for extracting minute data in the MMS message after analytically;
First moment extraction unit 1053, for extracting first non-vanishing moment from described minute data, was called for the first moment;
Second moment determining unit 1054, for the first described moment is added 4 minutes, obtained for the second moment;
Measured value determining unit 1055, for determining the power quality index value that described second moment is corresponding according to described script information, power quality index value corresponding to described second moment is the measured value of described digital electric power quality monitoring terminal;
Here power quality index refers to, a certain item test that user does, such as frequency departure test, although have voltage, electric current, frequency inside the parameter that user is arranged, it is just passable that index only closes frequency of heart, and need not be concerned about voltage, electric current, therefore desired value, just refers to frequency values.The parameter that user inputs, a series of script information is defined in program inside, test signal parameter, quality of power supply classification that script information is arranged for storing user, all signal parameters that single is tested are saved as a character string, and first parameter of each signal deposits the index of category of test.After the first moment was found, according to script information, being also just aware of the classification of second test signal, searching the desired value in the second moment under returned packet respective classes, is exactly power quality index value corresponding to the second moment.Testing result generation unit 1056, for described detection signal and described measured value being compared, judges whether described digital electric power quality monitoring terminal meets IEC standard, generates testing result.
Also namely, in a particular embodiment, host computer returned packet is resolved.Extract the minute data of standard signal, search the minute data of voltage indexes, from first non-vanishing moment, the basis of carving at this moment adds four minutes successively, and extract the value of corresponding power quality index, as the detected value of the tested device that a certain item is tested.
After obtaining the measured value of tested device, detection signal and described measured value being compared, is the actual P of monitoring terminal record according to the precision of regulation in " electric energy quality on-line monitoring device technical manual " (QGDW-10-J393-2009)
stNthe difference of value (i.e. measured value) and standard P st value (i.e. detection signal) is to the number percent of standard P st value, and accuracy computation formula is
the precision of power quality index value is p%, and the precision of digital standard source flickering is q%, and revised error range is
The i.e. actual P of digital electric power quality monitoring terminal record
stNthe difference of value and standard P st value to the number percent of standard P st value, can be thought that digital electric power quality monitoring terminal meets IEC standard, namely show Contemporary Digital formula electric energy quality monitoring terminal and meet IEC standard in testing result in error range.
The structured flowchart of the embodiment two of host computer in the automatic checkout system of a kind of digital electric power quality monitoring terminal that Figure 12 provides for the embodiment of the present invention, as shown in Figure 12, host computer also comprises:
Examining report generation module 106, for generating examining report according to described testing result.In examining report, evaluation is made to the precision of equipment under test.
Below technical scheme of the present invention is described in detail from principle angle.Fig. 8 is the process flow diagram of program control digital standard source (relay-protection tester) in specific embodiment, and digital electric power quality monitoring terminal automatic checkout system comprises:
(1) host computer.Mainly computing machine is the commander of system, control center.In digital electric power quality monitoring terminal automatic detecting platform, two roles played the part of by PC: 1. by flickering, temporarily general, the Power Quality Detection signal such as three-phase imbalance carries out analog to digital conversion, and discrete digital signal is passed to relay-protection tester mainboard by TCP/IP; 2. tested device, i.e. electric energy quality monitoring terminal, return to PC by IEC61850 agreement, has IEC61850 client application to resolve MMS message inside PC, forms closed-loop system.
(2) programmable instrument.Comprise various programmable instrument, driving source, programmed switch, program control servo-drive system, executive component, and the device such as display, printing, stored record, certain concrete test, control task can be completed.In digital electric power quality monitoring terminal automatic checkout system, programmable instrument is permitted the DRT-802 digital protective relay tester that continues exactly, by the stopping of the testing software control figure formula standard source DRT-802 on PC, beginning and closedown.
(3) bus and interface.The path of connection control device and various programmable instrument, completes message, order, the transmission of data and exchange, comprises mechanical connector, slot, cable etc.In digital electric power quality monitoring terminal automatic detecting platform, connect a netting twine of PC and digital standard source, network interface is RJ-45, and digital electric power quality monitoring terminal is the photoelectric commutator access PC of HTB-1100S by model.
(4) testing software.Application software is worked out for completing test assignment.Such as test procedure, driver etc.In digital electric power quality automatic detecting platform, testing software is Power Quality Detection platform.
(5) measurand.Different with test assignment, measurand varies often, adopts non-standard ways to be connected with programmable instrument, equipment by cable, connector, switch etc., draw test result by operating personnel.In digital electric power quality automatic detecting platform, detected equipment is digital electric energy quality monitoring terminal, and the model as Nanjing Can Neng company is the electric energy quality monitoring terminal of PQS-883.
Below in conjunction with specific embodiment, introduce technical scheme of the present invention in detail.The schematic diagram of the automatic checkout system of a kind of digital electric power quality monitoring terminal that Fig. 5 provides for the embodiment of the present invention, as shown in Figure 5:
Digital electric power quality monitoring terminal automatic checkout system with the .NET Framework4.0 framework platform of Microsoft for indispensable running environment, the formal version of Visual Studio2010 Chinese is software design tool, database adopts SQLSERVER2008R2, can run under Windows7 or Windows XP system, there is good compatibility.
System platform software major function comprises:
start log-in module (carrying out the startup of program, the scheduling of the login of user and checking and program);
parameter setting module (to the bookkeeping of censorship unit and feeding device for inspection information, the operation to script information, digital standard source signal output state, detection signal are arranged);
program control detection module (select sense terminals and Detection of content and to communicating and the detection of precision);
data inquiry module (comprise precision report and examining report, Operation Log Management namely to the inquiry of Operation Log and empty);
Be described with the example that is detected as of frequency departure, voltage deviation project below.
First, user arranges voltage deviation, the frequency departure signal of standard by host computer.For voltage deviation, standard signal is set to: voltage 50V, frequency 50HZ; Voltage 60V, frequency 50HZ; Voltage 98V, frequency 50HZ.Detect for frequency departure, standard signal is set to: voltage 20V, frequency 47.5HZ, and electric current is 5A.
Secondly, the sampling rate (sample_rate) of relay-protection tester is set to 80, SVID and is set to XJ_DRT_MU80_01; APPID is set to 16641, and MAC Address is the number of 01-0C-CD-04-01-01, ASDU is 1; PT no-load voltage ratio 1000:1, CT no-load voltage ratio 1:1.
Above two signals are carried out 80, every cycle discrete, according to the design of 2.2 joint automatic checkout system signals, the time span of two signals is three minutes, is spaced apart 1 minute between signal.Because sample frequency is 80 points/cycle, i.e. 1 second 4000 point, one minute 240000 point, and to be encapsulated as suffix be .dat binary file.
According to IEC61850-9-2LE standard, current/voltage one sub-value transmitted in SV message, sampled value is with 4 byte representations in SV message, and channel factor computing method are:
Current channel coefficient=electric current secondary ratings * 0.001/ electric current ratings
Voltage channel coefficient=voltage secondary ratings * 0.01/ electric current ratings
After relay-protection tester calculates each sampled point numerical value, conversion is that a sub-value is filled to message respective byte; After take over party receives SV message, resolve the digital value of corresponding byte, be multiplied by identical channel factor, the sampled value the same with relay-protection tester theoretical value can be obtained.If transmit leg is the same with take over party's sampled value buffer memory byte number, channel factor truncation account form is the same, the precision that error is 0 can be obtained in theory.
Relay-protection tester is that .dat binary file carries out the encapsulation of 9-2LE message suffix, and the number due to ASDU is 1, and the value therefore containing 1 sampled point inside a frame message, will send out 4000 frames in 1 second.
Digital electric energy quality detection device PQS-883 carries out power quality index statistics to the standard signal that digital standard source sends over, and statistics is returned to PC with MMS message format, voltage minute statistical value in MMS message is as shown in table 2, and the frequency minute statistical value in MMS message is as shown in table 2.
Table 2
| Time | A phase total voltage (maximal value) | B phase total voltage (maximal value) | C phase total voltage (maximal value) |
| 2014.2.1622:56:00 | 0.0000 | 0.0000 | 0.0000 |
| 2014.2.1622:57:00 | 49.997154 | 49.996830 | 49.996834 |
| 2014.2.1622:58:00 | 49.997154 | 49.996830 | 49.996834 |
| 2014.2.1622:59:00 | 49.997154 | 49.996830 | 49.996834 |
| 2014.2.1623:00:00 | 49.997154 | 49.996830 | 49.996834 |
| 2014.2.1623:01:00 | 59.996494 | 59.996689 | 59.996685 |
| 2014.2.1623:02:00 | 59.996494 | 59.996689 | 59.996685 |
| 2014.2.1623:03:00 | 59.996494 | 59.996689 | 59.996685 |
| 2014.2.1623:04:00 | 59.996494 | 59.996689 | 59.996685 |
| 2014.2.1623:05:00 | 97.995483 | 97.995573 | 97.995628 |
| 2014.2.1623:06:00 | 97.995483 | 97.995573 | 97.995628 |
| 2014.2.1623:07:00 | 97.995483 | 97.995573 | 97.995628 |
| 2014.2.1623:08:00 | 97.995483 | 97.995573 | 97.995628 |
| 2014.2.1623:09:00 | 19.998096 | 19.998096 | 19.997929 |
| 2014.2.1623:10:00 | 19.998096 | 19.998096 | 19.997929 |
| 2014.2.1623:11:00 | 19.998096 | 19.998096 | 19.997929 |
| 2014.2.1623:12:00 | 19.998096 | 19.998096 | 19.997929 |
| 2014.2.1623:13:00 | 0.0000 | 0.0000 | 0.0000 |
As can be seen from Table 2, three voltage signal 50V, 60V, 98V, each signal is 180 seconds, and the moment of electric energy quality monitoring terminal sampling is not from whole minute, therefore for the voltage signal of 50V, monitoring terminal is from 57min, return the value of four minutes always, because the waveform of 57min moment standard signal is not complete, but some spacing wave, therefore, the detected value that the magnitude of voltage that we get 58min returns as monitoring terminal; For the voltage signal of 60V, monitoring terminal from 23 1min, the detected value that the magnitude of voltage that we get 2min returns as monitoring terminal; For the voltage signal of 98V, monitoring terminal from 23 5min, the detected value that the magnitude of voltage that we get 6min returns as monitoring terminal.From reasoning above, when we find the detected value of first signal, only need move down four minutes successively, just can find the detected value of second, the 3rd, the 4th signal, thus realize the function of monitoring automatically.
It should be noted that, what the 4th signal did is that frequency departure detects, time rotating savings become 23: 09, and from the analysis result of MMS message, find markers to add the value of the frequency of 1, as the detected value that monitoring terminal returns.
Table 3
| Time | Frequency (maximal value) | Frequency (minimum value) | Frequency (mean value) |
| 2014-02-1622:56:00 | 50.000000 | 50.000000 | 50.000000 |
| 2014-02-1622:57:00 | 50.000000 | 49.998833 | 49.999943 |
| 2014-02-1622:58:00 | 50.000000 | 49.973282 | 49.998665 |
| 2014-02-1622:59:00 | 50.000000 | 49.997349 | 49.999870 |
| 2014-02-1623:00:00 | 50.000000 | 49.979893 | 49.998997 |
| 2014-02-1623:01:00 | 50.000000 | 49.997360 | 49.999870 |
| 2014-02-1623:02:00 | 50.000000 | 49.953270 | 49.997662 |
| 2014-02-1623:03:00 | 50.000000 | 49.953270 | 49.965797 |
| 2014-02-1623:04:00 | 50.000000 | 49.997349 | 49.999870 |
| 2014-02-1623:05:00 | 50.000000 | 49.979893 | 49.998997 |
| 2014-02-1623:06:00 | 50.000000 | 50.000000 | 50.00000 |
| 2014-02-1623:07:00 | 50.000000 | 49.998833 | 49.999943 |
| 2014-02-1623:08:00 | 50.000000 | 50.000000 | 50.000000 |
| 2014-02-1623:09:00 | 50.000000 | 47.500000 | 48.582294 |
| 2014-02-1623:10:00 | 47.500004 | 47.499996 | 47.500000 |
| 2014-02-1623:11:00 | 47.500004 | 47.499996 | 47.500000 |
| 2014-02-1623:12:00 | 50.000000 | 47.500000 | 48.582294 |
| 2014-02-1623:13:00 | 50.000000 | 49.998833 | 49.999943 |
| 2014-02-1623:14:00 | 50.000000 | 50.000000 | 50.000000 |
As can be seen from Table 3, the frequency values of 23 09min should be 47.5HZ.Through learning the analysis of monitoring terminal, the waveform of 08min---09min standard signal is not complete, but some spacing wave, monitoring terminal thinks that frequency is 50HZ automatically, what get due to the statistical value of a minute is the maximal value of 20 " 3S effective values ", therefore the frequency values of 23 09min is 50HZ, instead of 47.5HZ.The frequency values of 23: 12 also should be 50HZ.The detected value that monitoring terminal returns is 47.500004HZ.
● frequency accuracy calculates
In " electric energy quality on-line monitoring device technical manual " (QGDW-10-J393-2009), the precision of assigned frequency is 0.01Hz, and the frequency accuracy of digital standard source is 0.005%, and revised frequency error range is
Δf
N*(1-0.005％)-0.01≤Δf≤Δf
N*(1+0.005％)+0.01
● voltage deviation accuracy computation
Voltage deviation precision be the virtual voltage of monitoring device record and the difference of normal voltage to the number percent of normal voltage, accuracy computation formula is
in " electric energy quality on-line monitoring device technical manual " (QGDW-10-J393-2009), the permissible error of regulation fundamental voltage is 0.2%, and the voltage deviation precision of digital standard source is 0.005%, and the error range of revised voltage deviation is
U
N*(1-0.005％)*(1-0.2％)≤U≤U
N*(1+0.005％)*(1+0.2％)
Current deviation precision be the actual current of monitoring device record and the difference of normalized current to the number percent of normalized current, accuracy computation formula is
in " electric energy quality on-line monitoring device technical manual " (QGDW-10-J393-2009), the permissible error of regulation fundamental current is 0.5%, and the current deviation precision of digital standard source is 0.005%, and the error range of revised current deviation is
I
N*(1-0.005％)*(1-0.5％)≤I≤I
N*(1+0.005％)*(1+0.5％)
The frequency error detection table of automatic generation is as shown in table 4, and it is as shown in table 5 that the voltage error automatically generated detects table.
Table 4
| Test point/Hz | Standard value fs/Hz | Displayed value fx/Hz | Frequency departure/Hz | Allowed band/Hz |
| 42.5 | 42.5 | ≤0.01 | ||
| 45 | 45 | ≤0.01 | ||
| 47.5 | 47.5 | 47.5000 | 0.0000 | ≤0.01 |
| 50 | 50 | ≤0.01 | ||
| 52.5 | 52.5 | ≤0.01 | ||
| 55 | 55 | ≤0.01 | ||
| 57.5 | 57.5 | ≤0.01 |
Table 5
| Test point/V | Standard value Us/V | Displayed value Ux/V | Voltage accuracy/% | Allowed band/% |
| 56-1008 | 380.000 | ≤0.5 | ||
| 23-336 | 220.000 | ≤0.5 | ||
| 11-168 | 100.000 | ≤0.5 | ||
| 5.6-78 | 60.000 | 59.9965 | -0.0058 | ≤0.5 |
| 0.5rg | 50.000 | 49.9972 | -0.000056 | ≤0.5 |
| 0.6rg | 60.000 | ≤0.5 | ||
| 0.7rg | 70.000 | ≤0.5 | ||
| 0.8rg | 80.000 | ≤0.5 | ||
| 0.9rg | 98.000 | 97.9955 | -0.004592 | ≤0.5 |
| 1.0rg | 100.000 | ≤0.5 |
As above the automatic checkout system of a kind of digital electric power quality monitoring terminal provided by the invention is, digital electric power quality monitoring terminal can be screened out whether according to the detection of dynamic ability of IEC standard, accuracy of detection and various power quality index, easily and quickly the power of test of digitizing transforming plant energy quality end be assessed.
In sum, the invention provides a kind of automatic testing method and system of digital electric power quality monitoring terminal, the digital signal of program-controlled satisfactory simulated intelligence transformer station is sent to detected equipment by equipment, by the quality of power supply event MMS message that detected digital electric power mass-synchrometer is passed back, it is analyzed, detection system is made to form loop, compare with the original signal sent, thus evaluation is made to the equipment state of detected digital electric power mass-synchrometer.This set of detection method solves the raw digital signal in the past sent can not arrange program control shortcoming, forms measure loop, more intelligent automaticization simultaneously, eliminates the loaded down with trivial details of manual record comparison.Meanwhile, on the basis of power quality index in the past, add 10 cycles, successional detection, more comprehensively can make evaluation to equipment state.
Key problem in technology point of the present invention and wish protection point are:
1, the digital electric power quality monitoring terminal automatic checkout system of the technical program foundation, forms closed loop by host computer, relay-protection tester, tested digital electric power quality monitoring terminal, photoelectric commutator four part.
2, the detection signal of the automatic checkout system of the technical program design, when monitoring device sampling period and digital standard source output signal misplace among a small circle, still can avoid the mutual interference between adjacent signals, and the collection that the monitored device of test signal is complete can be ensured, thus effectively ensure accuracy and the availability of sampled data.
3, the technical program establishes digital electric power quality monitoring device automatic checkout system, the testing making original manual operations need the time to complete a table apparatus shortens within several several hours and completes the detection of multiple stage device, effectively solves quality of power supply terminal detecting device and detects problem that is inefficient, low accuracy.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, the hardware that can carry out instruction relevant by computer program has come, described program can be stored in general computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random AccessMemory, RAM) etc.
Those skilled in the art can also recognize that the various functions that the embodiment of the present invention is listed are the designing requirements realizing depending on specific application and whole system by hardware or software.Those skilled in the art for often kind of specifically application, can use the function described in the realization of various method, but this realization can should not be understood to the scope exceeding embodiment of the present invention protection.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. an automatic testing method for digital electric power quality monitoring terminal, is characterized in that, described method specifically comprises:
Gather the parameter information of user's input;
Detection signal, script information is generated according to described parameter information;
Described detection signal is carried out format conversion, obtains the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement;
The detection signal that the described IEC61850-9-2 of meeting requires is sent to digital electric power quality monitoring terminal;
Described digital electric power quality monitoring terminal is sampled to described detection signal, and exports the specification MMS message that industry manufactures message;
The testing result of described digital electric power quality monitoring terminal is determined according to described MMS message, script information and described detection signal.
2. method according to claim 1, it is characterized in that, described parameter information comprises voltage, electric current, frequency, phase angle, overtone order, voltage m-Acetyl chlorophosphonazo aberration rate, voltage harmonic aberration rate, electric current m-Acetyl chlorophosphonazo content, the temporary range of decrease degree of current harmonic content, falls duration, undulate quantity, flicker frequency temporarily; Described to meet detection signal that IEC61850-9-2 requires be front 75% effective, rear 25% invalid signal, 4 minutes altogether.
3. method according to claim 2, is characterized in that, generates detection signal specifically comprise according to described parameter information:
Simulating signal is generated according to described parameter information;
Dispersion number mode convertion is carried out to described simulating signal, obtains detection signal.
4. method according to claim 3, is characterized in that, described detection signal is carried out format conversion, and the detection signal obtaining meeting IEC61850-9-2 requirement specifically comprises:
Described detection signal is stored with Institute of Electrical and Electric Engineers IEEE floating number form;
Determine the sampled value of described detection signal;
Be be stored to sampled value SMV message after a sub-value by described sampled value conversion, described SMV message is the detection signal meeting IEC61850-9-2 and require.
5. method according to claim 4, is characterized in that, determines that the testing result of described digital electric power quality monitoring terminal specifically comprises according to described MMS message, script information and described detection signal:
MMS message described in parsing;
Minute data is extracted in MMS message analytically;
From described minute data, extract first non-vanishing moment, be called for the first moment;
The first described moment is added 4 minutes, obtained for the second moment;
Determine according to described script information the power quality index value that described second moment is corresponding, power quality index value corresponding to described second moment is the measured value of described digital electric power quality monitoring terminal;
Described detection signal and described measured value are compared, judges whether described digital electric power quality monitoring terminal meets IEC standard, generate testing result.
6. the method according to claim 2 or 5, is characterized in that, after the testing result determining described digital electric power quality monitoring terminal, described method also comprises:
Examining report is generated according to described testing result.
7. an automatic checkout system for digital electric power quality monitoring terminal, is characterized in that, described system specifically comprises host computer, relay-protection tester, photoelectric commutator and tested digital electric power quality monitoring terminal,
Wherein, described host computer, for gathering the parameter information of user's input, generating detection signal, script information according to described parameter information, and described detection signal is sent to relay-protection tester;
Described relay-protection tester, for described detection signal is carried out format conversion, obtain the detection signal meeting International Electrotechnical Commission IEC61850-9-2 requirement, and the detection signal that the described IEC61850-9-2 of meeting requires is sent to described digital electric power quality monitoring terminal;
Described digital electric power quality monitoring terminal, for sampling to meeting the detection signal that IEC61850-9-2 requires, and is sent to described host computer by the specification MMS message that industry to be manufactured message by photoelectric commutator;
Described host computer, for determining the testing result of described digital electric power quality monitoring terminal according to described MMS message, script information and described detection signal.
8. system according to claim 7, it is characterized in that, described parameter information comprises voltage, electric current, frequency, phase angle, overtone order, voltage m-Acetyl chlorophosphonazo aberration rate, voltage harmonic aberration rate, electric current m-Acetyl chlorophosphonazo content, the temporary range of decrease degree of current harmonic content, falls duration, undulate quantity, flicker frequency temporarily; Described to meet detection signal that IEC61850-9-2 requires be front 75% effective, rear 25% invalid signal, 4 minutes altogether.
9. system according to claim 8, is characterized in that, described host computer specifically comprises:
Parameter information acquisition module, for gathering the parameter information of user's input;
Simulating signal generation module, for generating simulating signal, script information according to described parameter information;
D/A converter module, for carrying out dispersion number mode convertion to described simulating signal, obtains detection signal;
Signal transmitting module, for being sent to relay-protection tester by described detection signal;
Testing result determination module, for determining the testing result of described digital electric power quality monitoring terminal according to described MMS message, script information and described detection signal.
10. system according to claim 9, is characterized in that, described relay-protection tester specifically comprises:
Memory module, for storing described detection signal with Institute of Electrical and Electric Engineers IEEE floating number form;
Sampled value determination module, for determining the sampled value of described detection signal;
Conversion module, for being be stored to sampled value SMV message after a sub-value by the conversion of described sampled value, described SMV message is the detection signal meeting IEC61850-9-2 and require;
Signal transmitting module, is sent to described digital electric power quality monitoring terminal for the detection signal required by the described IEC61850-9-2 of meeting.
11. systems according to claim 9, is characterized in that, described testing result determination module specifically comprises:
Resolution unit, for resolving described MMS message;
Minute data extraction unit, for extracting minute data in the MMS message after analytically;
First moment extraction unit, for extracting first non-vanishing moment from described minute data, was called for the first moment;
Second moment determining unit, for the first described moment is added 4 minutes, obtained for the second moment;
Measured value determining unit, for determining the power quality index value that described second moment is corresponding according to described script information, power quality index value corresponding to described second moment is the measured value of described digital electric power quality monitoring terminal;
Testing result generation unit, for described detection signal and described measured value being compared, judges whether described digital electric power quality monitoring terminal meets IEC standard, generates testing result.
System described in 12. according to Claim 8 or 11, is characterized in that, described host computer also comprises:
Examining report generation module, for generating examining report according to described testing result.
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