CN102621512B - Dynamic simulation test method for timekeeping performance of merging unit - Google Patents
Dynamic simulation test method for timekeeping performance of merging unit Download PDFInfo
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Abstract
A dynamic simulation test method for timekeeping performance of a merging unit includes the steps: setting up a dynamic analog simulation system aiming at voltage class and specific environment of a device to be detected to simulate normal operating conditions and earth fault conditions of the system; selecting and connecting time precision test equipment; performing time precision error test of a merging unit to be detected after synchronization; performing time precision error test of the merging unit to be detected within the a timekeeping period after synchronizing signals are lost; and subjecting the merging unit to be detected to dynamic simulation detecting evaluation. The method solves the problem of detection method for timekeeping performance of the merging unit, timekeeping precision of the merging unit can be accurately tested, excellencies of the timekeeping performance of the merging unit under various operating conditions of an intelligent substation can be truly assessed, timekeeping indexes of the merging unit are reasonably evaluated, and the method is widely applicable to research and development, quality detection, maintenance test and the like of merging units of intelligent substations.
Description
Technical field
The invention belongs to each electric pressure dynamic power system simulations field tests, be specifically related to a kind of dynamic simulant test method of merge cells timekeeping performance.
Background technology
The automatic operating of intelligent substation Jiang Wei transformer station and management bring far-reaching influence and huge change, are the important component parts that intelligent grid is built, and in economy and technical elements, all have great significance.The widespread use in intelligent substation along with electronic mutual inductor and digital communication technology, merge cells has become the important step in the collection of transformer station's internal information, transport process, and its function and performance are subject to extensive concern.Yet intelligent substation is as an emerging field, what electronic mutual inductor and merge cells adopted is new technology, and still in the application initial stage, himself characteristic and stability are not also very clear and definite, and application experience is not enough.Therefore, the reliability application in intelligent substation is very necessary to it for the method for testing of merge cells properties, is the important means of device development and detection.
Merge cells is the key equipment of intelligent substation electric parameters information acquisition, in standing electrical secondary system required voltage, electric current all directly or by Ethernet from merge cells, therefore the data that merge cells transmits must be true, accurate, and its performance quality directly affects the working condition of other equipment of electrical secondary system.Merge cells carries out data acquisition need to receive external timing signal, carries out image data and synchronously processes, when merge cells loses external clock source, by the punctual work of internal clocking.Therefore, in the situation that externally clock signal disappears, the precision of merge cells internal clocking and timekeeping performance will have influence on the synchronism of adopted data, and then affect the performance that the data such as relay protection are used equipment.Therefore, whether the timekeeping performance that must be combined unit before engineering application is carried out specific aim test, detect its performance index and meet the requirements.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of dynamic simulant test method of merge cells timekeeping performance, described method of testing comprises the following steps:
(1) build simulated intelligence transformer station dynamic simulative emulation primary system;
(2) set up the electrical secondary system of the described simulated intelligence of simulation transformer station;
(3) with master and slave satellite synchronization device, receive GPS synchronizing signal;
(4) simulate described simulated intelligence transformer station clock system;
(5) described clock accuracy testing apparatus is carried out to GPS pps pulse per second signal synchronous;
(6) pulse signal of more described merge cells output to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(7) disconnect the clock sync signal of described merge cells to be measured, the pulse signal of more described merge cells output to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(8), according to dynamic similation primary system ruuning situation, analyze and survey the sampled data that merge cells sends.
Described step (1) is for the intelligent substation specific environment of merge cells to be measured application, builds described simulated intelligence transformer station dynamic simulative emulation system and comprises the following steps:
(1-1) adopt equivalent generator 3 simulative power plants;
(1-2) adopt equivalent power supply 2 simulations to wait valve system;
(1-3) adopt three-winding transformer 1, double-bus configuration simulated intelligence transforming plant primary system, between simulated intelligence transformer station and simulative power plant, through single time analog line, be connected, and through double back analog line, be connected between the valve system such as described simulation;
(1-4) voltage of described simulated intelligence transformer station, current signal are gathered, and are sent to described digital oscillograph by electronic type voltage transformer 5, electronic current mutual inductor 4;
(1-5) under, in the high, medium and low voltage side of analog line, double-bus and transformer, 12 trouble spots are set altogether, each trouble spot is for simulating various types of metallicity or through the fault of transition resistive short, affiliated transformer high-voltage winding arranges a trouble spot, for simulating the turn-to-turn short circuit of different range.
Described step (5) is carried out GPS pps pulse per second signal to described clock accuracy testing apparatus and is synchronously comprised the following steps:
(5-1) described merge cells to be measured is accessed to described electrical secondary system clock sync signal;
(5-2) choose clock accuracy testing apparatus;
(5-3) external global position system GPS.
Clock accuracy error after the maximal value Δ T0 of time difference Δ t between the pulse signal of described merge cells to be measured output and the pps pulse per second signal of described clock accuracy testing apparatus is synchronizeed as described merge cells to be measured, the test duration should continue more than 10 minutes.
The pulse signal of exporting after described merge cells disconnection clock sync signal to be measured and the maximal value Δ T1 of the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus lose the clock accuracy error of described clock sync signal as described merge cells to be measured, the test duration should continue more than 10 minutes.
Described clock accuracy testing apparatus is less than 100 nanoseconds, pulse per second (PPS) measuring accuracy for punctual precision is less than and is less than 100 nanoseconds, resolution the clock accuracy testing apparatus that 1 nanosecond, clock lock time is greater than 12 hours.
Described electrical secondary system comprises Ethernet switch, data waveform record analysis device, digital oscillograph and analog machine automatic control system.
According to following evaluation criterion, the performance of keeping of described merge cells is carried out to dynamic similation detection:
(a) described merge cells to be measured incoming clock synchronizing signal and to time stable after, described in it, clock accuracy error should be not more than 1 microsecond, it transmits data should be correctly, continuously, effective.
(b) described merge cells to be measured its transmission data in losing outer synchronous signal process should not go out active, and in described dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data.
(c) described merge cells to be measured loses after outer synchronous signal, and in 10 minutes, described clock accuracy error should be not more than 4 microseconds, and in described dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data.
Compared with prior art, beneficial effect of the present invention is to provide a kind of merge cells timekeeping performance ground dynamic similation method of testing, solve merge cells timekeeping performance and referred to object detection method problem, can test accurately the punctual precision of merge cells, examine truly the excellence of merge cells timekeeping performance under the various operating modes of intelligent substation, the punctual index of rational evaluation merge cells, design for related device, type selecting, operation provides important reference frame, can be widely used in Intelligent substation merging unit research and development test, the work such as quality testing and maintenance test.
Accompanying drawing explanation
Tu1Shi simulated intelligence transformer station dynamic simulative emulation primary system schematic diagram; Wherein, 1. three-phase winding transformer; 2. equivalent power supply; 3. equivalent generator; 4. electronic current mutual inductor; 5. electronic type voltage transformer; 6. switch; 7. trouble spot;
Fig. 2 is that merge cells to be measured accesses simulated intelligence transformer station dynamic simulative emulation electrical secondary system schematic diagram;
Fig. 3 is merge cells test flow chart to be measured.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1-Figure 3, a kind of dynamic simulant test method of merge cells timekeeping performance, described method of testing comprises the following steps:
(1) build simulated intelligence transformer station dynamic simulative emulation primary system;
(2) set up the electrical secondary system of the described simulated intelligence of simulation transformer station;
(3) with master and slave satellite synchronization device, receive GPS synchronizing signal;
(4) simulate described simulated intelligence transformer station clock system;
(5) described clock accuracy testing apparatus is carried out to GPS pps pulse per second signal synchronous;
(6) pulse signal of more described merge cells output to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(7) disconnect the clock sync signal of described merge cells to be measured, the pulse signal of more described merge cells output to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(8) test macro ruuning situation, analyzes and surveys the sampled data that merge cells sends.
Described step (1) is for the intelligent substation specific environment of merge cells to be measured application, builds described simulated intelligence transformer station dynamic simulative emulation system and comprises the following steps:
(1-1) adopt the power plant of equivalent generator simulation 220kV side overall apparatus capacity 550MKV, adopt the power plant of equivalent generator simulation 110kV side total installation of generating capacity 120MVA;
(1-2) to adopt equivalent power supply simulation system capacity of short circuit be 10000MVA waits valve system;
(1-3) three-winding transformer that in the three-winding transformer simulated intelligence transformer station of employing mode of connection Y0/Y/ △-12-11, rated capacity is 238MVA, double-bus configuration, between simulated intelligence transformer station and simulation 220kV side power plant, through mono-time analog line of 100km, be connected, power plant is connected through mono-time analog line of 10km with simulation 110kV side, waits between valve system and is connected through 200km double back analog line with simulation;
(1-4) at high voltage side of transformer, medium voltage side, low-pressure side access electronic current mutual inductor ECT1, the ECT2 ECT3 that laughs a great ho-ho, gather current signal respectively, send ZH-5N numeral oscillograph to;
(1-5) the high, medium and low voltage side at transformer arranges 6 trouble spots altogether, each trouble spot is for simulating various types of metallicity or through the fault of transition resistive short, transformer high-voltage winding arranges a trouble spot, for simulating the turn-to-turn short circuit of different range;
(1-6) by RuggedCom2188 Ethernet switch, NSAR512 online data supervising device, ZH-5N numeral oscillograph, analog machine automatic control system, set up the electrical secondary system of simulated intelligence transformer station;
(1-7) adopt YJD2000 satellite synchronization device to receive GPS synchronizing signal, simulated intelligence transformer station clock system.
Described step (5) is carried out GPS pps pulse per second signal to described clock accuracy testing apparatus TIME007 and is synchronously comprised the following steps:
(5-1) described merge cells to be measured is accessed to described electrical secondary system clock sync signal;
(5-2) choose clock accuracy testing apparatus;
(5-3) external global position system GPS.
Clock accuracy error after the maximal value Δ T0 of time difference Δ t between the pulse signal of described merge cells to be measured output and the pps pulse per second signal of described clock accuracy testing apparatus is synchronizeed as described merge cells to be measured, the test duration should continue more than 10 minutes.
The pulse signal of exporting after described merge cells disconnection clock signal synchronization to be measured and the maximal value Δ T1 of the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus lose the clock accuracy error of described clock sync signal as described merge cells to be measured, the test duration should continue more than 10 minutes.
Described clock accuracy testing apparatus is less than 100 nanoseconds, pulse per second (PPS) measuring accuracy for punctual precision is less than and is less than 100 nanoseconds, resolution the clock accuracy testing apparatus that 1 nanosecond, clock lock time is greater than 12 hours.
According to following evaluation criterion, the performance of keeping of described merge cells is carried out to dynamic similation detection:
(a) described merge cells to be measured incoming clock synchronizing signal and to time stable after, described in it, clock accuracy error should be not more than 1 microsecond, it transmits data should be correctly, continuously, effective;
(b) described merge cells to be measured its transmission data in losing outer synchronous signal process should not go out active, and in described dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data;
(c) described merge cells to be measured loses after outer synchronous signal, and in 10 minutes, described clock accuracy error should be not more than 4 microseconds, and in described dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data.
Claims (8)
1. a dynamic simulant test method for merge cells timekeeping performance, is characterized in that: described method of testing comprises the following steps:
(1) build simulated intelligence transformer station dynamic simulative emulation primary system;
(2) set up the electrical secondary system of the described simulated intelligence of simulation transformer station;
(3) with master and slave satellite synchronization device, receive GPS synchronizing signal;
(4) simulate described simulated intelligence transformer station clock system;
(5) clock accuracy testing apparatus is carried out to GPS pps pulse per second signal synchronous;
(6) pulse signal of merge cells output more to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(7) disconnect the clock sync signal of described merge cells to be measured, the pulse signal of more described merge cells output to be measured and the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus;
(8) analyze the sampled data that merge cells to be measured sends.
2. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, it is characterized in that: described step (1) is for the intelligent substation specific environment of merge cells to be measured application, build described simulated intelligence transformer station dynamic simulative emulation system and comprise the following steps:
(1-1) adopt equivalent generator (3) simulative power plant;
(1-2) adopt the valve systems such as equivalent power supply (2) simulation;
(1-3) adopt three-winding transformer (1), double-bus configuration simulated intelligence transforming plant primary system, between described simulated intelligence transformer station and simulative power plant, through single time analog line, be connected, and through double back analog line, be connected between the valve system such as described simulation;
(1-4) voltage of described simulated intelligence transformer station, current signal are gathered, and are sent to digital oscillograph by electronic type voltage transformer (5), electronic current mutual inductor (4);
(1-5) in the high, medium and low voltage side of analog line, double-bus and transformer, 12 trouble spots are set altogether, each trouble spot is for simulating various types of metallicity or through the fault of transition resistive short, transformer high-voltage winding arranges a trouble spot, for simulating the turn-to-turn short circuit of different range.
3. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, is characterized in that: described step (5) is carried out GPS pps pulse per second signal to described clock accuracy testing apparatus and synchronously comprised the following steps:
(5-1) described merge cells to be measured is accessed to described electrical secondary system clock sync signal;
(5-2) choose clock accuracy testing apparatus;
(5-3) external global position system GPS.
4. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, it is characterized in that: the clock accuracy error after the maximal value Δ T0 of the time difference Δ t between the pulse signal of described merge cells to be measured output and the pps pulse per second signal of described clock accuracy testing apparatus is synchronizeed as described merge cells to be measured, the test duration should continue more than 10 minutes.
5. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, it is characterized in that: the pulse signal of exporting after described merge cells disconnection clock sync signal to be measured and the maximal value Δ T1 of the time difference Δ t between the pps pulse per second signal of described clock accuracy testing apparatus lose the clock accuracy error of described clock sync signal as described merge cells to be measured, the test duration should continue more than 10 minutes.
6. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, is characterized in that: described clock accuracy testing apparatus is less than 100 nanoseconds, pulse per second (PPS) measuring accuracy for punctual precision is less than and is less than 100 nanoseconds, resolution the clock accuracy testing apparatus that 1 nanosecond, clock lock time is greater than 12 hours.
7. according to the dynamic simulant test method of a kind of merge cells timekeeping performance described in claim 1 or 3, it is characterized in that: described electrical secondary system comprises Ethernet switch, data waveform record analysis device, digital oscillograph and analog machine automatic control system.
8. the dynamic simulant test method of a kind of merge cells timekeeping performance according to claim 1, is characterized in that: according to following evaluation criterion, the timekeeping performance of described merge cells is carried out to dynamic similation detection:
(a) described merge cells to be measured incoming clock synchronizing signal and to time stable after, described in it, clock accuracy error should be not more than 1 microsecond, it transmits data should be correctly, continuously, effective;
(b) described merge cells to be measured its transmission data in losing outer synchronous signal process should not go out active, and in dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data;
(c) described merge cells to be measured loses after outer synchronous signal, and in 10 minutes, described clock accuracy error should be not more than 4 microseconds, and in described dynamic simulator system operation and simulated failure process, merge cells all can correctly transmit data.
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| CN103135087B (en) * | 2012-12-28 | 2015-12-02 | 辽宁省电力有限公司 | Electronic mutual inductor whole detection and evaluating system |
| CN103439597A (en) * | 2013-08-06 | 2013-12-11 | 国家电网公司 | Merging unit synchronous punctual tester based on analog quantity digitized transmission and method therefore |
| CN103439679B (en) * | 2013-08-28 | 2015-08-19 | 国家电网公司 | Intelligent substation mutual inductor data collection system absolute time delay detection device and method |
| CN103558474A (en) * | 2013-11-08 | 2014-02-05 | 国家电网公司 | Novel merging unit verifying device |
| CN103941211B (en) * | 2014-05-12 | 2015-09-30 | 国家电网公司 | A kind of analog input merge cells automatic Verification method |
| CN106443215A (en) * | 2016-10-10 | 2017-02-22 | 国网安徽省电力公司电力科学研究院 | Intelligent transformer station transformer protection merging unit synchronous phase sequence checking test device and method |
| CN107359873B (en) * | 2017-07-27 | 2024-02-23 | 中国电力科学研究院 | Device and method for calibrating clock error of merging unit tester based on phase locking and phase shifting |
| CN112394708B (en) * | 2020-10-30 | 2021-11-26 | 国网新疆电力有限公司电力科学研究院 | Intelligent Internet of things management virtual test method for power grid safety and stability control system |
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