CN104020389A - Method for automatically testing line differential protection based on RTDS - Google Patents
Method for automatically testing line differential protection based on RTDS Download PDFInfo
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- CN104020389A CN104020389A CN201410201049.3A CN201410201049A CN104020389A CN 104020389 A CN104020389 A CN 104020389A CN 201410201049 A CN201410201049 A CN 201410201049A CN 104020389 A CN104020389 A CN 104020389A
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Abstract
The invention relates to a method for automatically testing line differential protection based on an RTDS. The method includes the steps that line differential protection test programs are set by an RTDS script setting module; a line differential protection model is established and operated through a protection model operating module; the line differential protection test programs are operated sequentially through a script operating module in the line differential protection model; test results are stored as waveform files according to corresponding test program names; the waveform files are read through an MATLAB module and experiment results are generated according to the waveform files; a test report is output through a test report output module according to the experiment results. Compared with the prior art, the method has the advantages of being short in test time, high in accuracy and the like.
Description
Technical field
The present invention relates to electric system technical field of measurement and test, especially relate to a kind of line differential protection automatic test approach based on RTDS.
Background technology
It is more difficult that line differential protection simulation test is got up, and mainly contains following reason: the first, and the current return of differential protection is many; The second, the core of differential protection is available to differential relay or automated system, requires the polarity of each current return must be correct, otherwise polarity wrong becomes and electric current; The 3rd, the characteristic test of differential protection is more difficult.
Real-timedigital simulation system RTDS is mainly used in the l-G simulation test research of electric system; to carry out Power System Analysis, protection and control research and the dedicated platform of imparting knowledge to students; can intactly simulate and the dynamic perfromance of emulation electric system from generating, transmission of electricity, power transformation to electricity consumption overall process; and can carry out in real time emulation accurately to ac and dc systems; its modeling period is short, dirigibility is strong, visual result, frequency characteristic scope are large; the rationality of computational accuracy and model, by domestic and international operation for many years, facts have proved and can trust.
At present, Duo Jia Utilities Electric Co. and research institution utilize this system to carry out the network access testing of power system device both at home and abroad.Its application has comprised the every field such as relay protection device network access testing, control system test, systematic analysis, and scale and plant factor all maintain the leading position at home.
Summary of the invention
Object of the present invention is exactly to provide in order to overcome the defect that above-mentioned prior art exists the line differential protection automatic test approach based on RTDS that a kind of test duration is short, precision is high.
Object of the present invention can be achieved through the following technical solutions:
A line differential protection automatic test approach based on RTDS, comprises the following steps:
RTDS script arranges module and arranges the step of line differential protection test event;
Protection model operation module is set up the step of line differential protection model operation;
Script operation module is moved successively in order the step of each test event in line differential protection model;
Test result is saved as to the step of wave file according to corresponding test event title;
MATLAB module reads wave file, and generates the step of experimental result according to wave file;
Test report output module is according to the step of experimental result output test report.
Described line differential protection test event comprises that troubles inside the sample space, external area error, evolved fault, transition resistance, vibration, PT broken string, CT broken string, power inverted orientation, transient state surmount, zero-sequenceprotection, weak feedback, cross line fault are earth-free and cross line fault ground connection.
In the step of the described each test event of operation, also comprise: if there is mistake in operational process, out of service and output error hint instructions.
Described wave file is Comtrade form.
Described MATLAB module realizes the transmitted in both directions of moving module with script by data input/output interface.
Compared with prior art, the inventive method is carried out line differential protection by RTDS and is automatically tested, and utilizes MATLAB to generate test result, can effectively shorten the testing of equipment time, reduce operations staff's working strength, improved the degree of accuracy of test and the utilization ratio of real-timedigital simulation system; In addition, the inventive method can utilize RTDS to carry out the automatic test of various faults, and test specification is wide.
Brief description of the drawings
Fig. 1 is the process flow diagram of line differential protection automatic test approach of the present invention;
Fig. 2 is the line differential protection of the present invention module composition schematic diagram of test automatically;
Fig. 3 is the functional schematic that the embodiment of the present invention can realize;
Fig. 4 is the evolved fault schematic flow sheet of the embodiment of the present invention;
Fig. 5 is in the district of the embodiment of the present invention, external area error schematic flow sheet;
Fig. 6 is the transition resistance schematic flow sheet of the embodiment of the present invention;
Fig. 7 is the vibration schematic flow sheet of the embodiment of the present invention;
Fig. 8 is the generation test report schematic diagram of the embodiment of the present invention.
embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented as prerequisite taking technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, a kind of line differential protection automatic test approach based on RTDS, comprises the following steps:
In step S1, generate the batch processing script file that real-timedigital simulation system RTDS can move, line differential protection test event is set, as shown in Figure 3, line differential protection test event comprise that troubles inside the sample space, external area error, evolved fault, transition resistance, vibration, PT broken string, CT broken string, power inverted orientation, transient state surmount, the earth-free and cross line fault ground connection of zero-sequenceprotection, weak feedback, cross line fault etc.;
In step S2, set up line differential protection model operation;
In step S3, in line differential protection model, move successively in order each test event, if there is mistake in operational process, out of service and output error hint instructions;
In step S4, test result is saved as to the wave file of Comtrade form according to corresponding test event title;
In step S5, MATLAB module reads wave file, and generates experimental result according to wave file, and MATLAB module realizes the transmitted in both directions of moving module with script by data input/output interface;
In step S6, according to experimental result output test report.
As shown in Figure 2, the system that realizes above-mentioned line differential protection automatic test approach comprises that RTDS script arranges module 1, protection model operation module 2, script operation module 3, MATLAB module 4 and MATLAB module 5.
As Figure 4-Figure 7 for this method is carried out in evolved fault, district and the schematic flow sheet of external area error, transition resistance and vibration.
As shown in Figure 8, while generating experimental result by MATLAB module, under MATLAB environment, calling data IO interface program jtcp function, realize the transmitted in both directions of MATLAB and RTDS, the executable file of Calling MATLAB software in batch processing script file, utilize MATLAB software to carry out reading Analysis to the wave file of the Comtrade form generating, the whether malfunction of essential record isolating switch, the mains side trip protection time, mains side reclosure time and load side trip protection time, and these data results are imported to txt file, experimental result is provided to corresponding conclusion.
Claims (5)
1. the line differential protection automatic test approach based on RTDS, is characterized in that, comprising:
RTDS script arranges module and arranges the step of line differential protection test event;
Protection model operation module is set up the step of line differential protection model operation;
Script operation module is moved successively in order the step of each test event in line differential protection model;
Test result is saved as to the step of wave file according to corresponding test event title;
MATLAB module reads wave file, and generates the step of experimental result according to wave file;
Test report output module is according to the step of experimental result output test report.
2. a kind of line differential protection automatic test approach based on RTDS according to claim 1; it is characterized in that, described line differential protection test event comprises that troubles inside the sample space, external area error, evolved fault, transition resistance, vibration, PT broken string, CT broken string, power inverted orientation, transient state surmount, zero-sequenceprotection, weak feedback, cross line fault are earth-free and cross line fault ground connection.
3. a kind of line differential protection automatic test approach based on RTDS according to claim 1, is characterized in that, in the step of the described each test event of operation, also comprises: if there is mistake in operational process, and out of service and output error hint instructions.
4. a kind of line differential protection automatic test approach based on RTDS according to claim 1, is characterized in that, described wave file is Comtrade form.
5. a kind of line differential protection automatic test approach based on RTDS according to claim 1, is characterized in that, described MATLAB module realizes the transmitted in both directions of moving module with script by data input/output interface.
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| CN201410201049.3A CN104020389A (en) | 2014-05-13 | 2014-05-13 | Method for automatically testing line differential protection based on RTDS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672945A (en) * | 2019-09-28 | 2020-01-10 | 上海电力大学 | Line protection automatic test system based on real-time digital simulation system |
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