CN105572619A - Online transient test system for electronic current transformer - Google Patents
Online transient test system for electronic current transformer Download PDFInfo
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- CN105572619A CN105572619A CN201610120583.0A CN201610120583A CN105572619A CN 105572619 A CN105572619 A CN 105572619A CN 201610120583 A CN201610120583 A CN 201610120583A CN 105572619 A CN105572619 A CN 105572619A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention discloses an online transient test system for an electronic current transformer. The system comprises a standard source transient signal acquisition system, a detected electronic current transformer, a detected transformer transient signal acquisition system and a transient signal processing system, wherein the standard source transient signal acquisition system is arranged at a position close to a primary side system of a detected transformer. A transient large current of the primary system is accurately measured, the current is made to pass through the standard source transient signal acquisition system and then the detected electronic current transformer, transient signals passing through the two are respectively received by the transient signal processing system, the former is taken as standards for determining transient characteristics of the detected transformer when the detected transformer in real operation is in fault, and transient characteristic precision of the detected transformer can be really reflected. Through mounting the detected transformer at an operation field, the standard source data is sent by utilizing the wireless transceiving system technology to a transient signal processor, and online transient test on the detected electronic transformer is accomplished.
Description
Technical field
The present invention relates to power system transformer substation technical field, particularly relate to the online transient test system of a kind of electronic current mutual inductor.
Background technology
Electronic mutual inductor is applied in a large number in electric system, and the quality of electronic current mutual inductor can be embodied on its transient state essence P degree.Test for electronic mutual inductor transient state precision can be divided into off-line transient test and online transient test two schemes, the test mode of the operational process of off-line test and analog electrical minor mutual inductor, namely on-line testing completes the normal operation that test does not affect electronic mutual inductor simultaneously in the true operational process of electronic mutual inductor, namely " work field test ".
At present, the transient test of domestic electronic mutual inductor is substantially all test in Xi'an High-Voltage Electrical Appliances research institute, employing be the transient state process big current that the mode of heavy current impact produces required for test, and then test product to be tested together with merge cells.The hardware test condition high investment that this mode relies on is large, need to build large primary system physics Dynamic Model Test room of taking up an area, this makes the scientific research institutions of provincial this rank of DianKeYuan of the domestic overwhelming majority, all cannot specialize in the transient characterisitics of electronic mutual inductor.And adopt off-line transient test cannot consider the change of voltage, the namely change of voltage field intensity is not effectively tested for the impact of electronic mutual inductor transient state precision always.Although on-line testing can make up the impact of change in voltage, but at present, on-line testing substantially also rests on the comparison stage by tested electronic mutual inductor and traditional mutual inductor string among the same circuit, tested electronic mutual inductor and traditional mutual inductor are carried out the ratio of precision pair of transient state process, this mode can only obtain the otherness of two class mutual inductors, cannot prove the true transient state precision of tested electronic mutual inductor.
In sum, need a kind of on-line testing transient state technology, improve the measuring accuracy of the transient state progress of disease of electronic mutual inductor at the scene in operational process when true fault occurs.
Summary of the invention
The invention provides the online transient test system of a kind of electronic current mutual inductor, with the problem that the transient state progress of disease measuring accuracy solving electronic current mutual inductor of the prior art is lower.
In order to solve the problems of the technologies described above, the embodiment of the invention discloses following technical scheme:
The online transient test system of a kind of electronic current mutual inductor, comprises standard source collecting transient data system, tested electronic current mutual inductor, tested electronic current mutual inductor collecting transient data system and Transient Signal Processing system; Described standard source collecting transient data Operation system setting is in the position near described tested electronic current mutual inductor primary side system; Described standard source collecting transient data system and described Transient Signal Processing system are communicated to connect by wireless transceiver system; Described tested electronic current mutual inductor, tested electronic current mutual inductor collecting transient data system and Transient Signal Processing system are electrically connected successively.
Preferably, in the online transient test system of above-mentioned electronic current mutual inductor, described standard source collecting transient data system comprises the shunt, Signal-regulated kinase, analog-to-digital conversion module and the sampling fpga chip that are electrically connected successively; Described wireless transceiver system comprises wireless sending module and wireless receiving module; Another output terminal of described shunt is electrically connected with described tested electronic current mutual inductor; The input end of described wireless sending module is electrically connected with described sampling fpga chip, the input end of output terminal and described wireless receiving module communicates to connect; The output terminal of described wireless receiving module is electrically connected with described Transient Signal Processing system.
Preferably, in the online transient test system of above-mentioned electronic current mutual inductor, described tested electronic current mutual inductor collecting transient data system comprises the collecting unit and merge cells that are electrically connected successively, described collecting unit and described tested electronic current mutual inductor electrical connection, described merge cells is electrically connected with described Transient Signal Processing system by fiber optical transceiver.
Preferably, in the online transient test system of above-mentioned electronic current mutual inductor, unit when described sampling fpga chip comprises sampling unit and first pair, described sampling unit and first pair time unit be all electrically connected with described wireless sending module.
Preferably, in the online transient test system of above-mentioned electronic current mutual inductor, described Transient Signal Processing system comprise Signal reception fpga chip, second pair time unit and transient signal analytic unit, described Signal reception fpga chip and second pair time unit be all electrically connected with described wireless receiving module, described transient signal analytic unit is electrically connected with described Signal reception fpga chip.
From above technical scheme, the online transient test system of electronic current mutual inductor provided by the invention, by the transient heavy current of Measurement accuracy primary side system, and make it first by after standard source collecting transient data system, again by tested mutual inductor, eventually pass through both transient signals all by Transient Signal Processing system acceptance also, so namely the former can be used as the criterion of transient characterisitics quality when tested mutual inductor breaks down in true operation, compare current online transient test system, transient test system provided by the invention more can reflect the transient characterisitics precision of tested mutual inductor really.
The present invention, by the operation in-site installation at tested mutual inductor, utilizes wireless transceiver system technology that standard source data are sent to Transient Signal Processing and leads to, complete the online transient test of electronic mutual inductor.Detection system of the present invention is in running always, when discovery primary side system has transient state process, then completes a transient state and detects, and enter in transient state process wait next time.The method has versatility; electronic current mutual inductor transient characterisitics can be made to test this important test job and to be no longer confined to other specialized laboratory extremely individual; the transient test ability that electronic current mutual inductor scene is run can be improved; improve the safety and reliability of intelligent grid relay protection device protection act when fault occurs, for the safe and stable operation of electrical network provides safeguard.
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, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the online transient test system of a kind of electronic current mutual inductor that Fig. 1 provides for the embodiment of the present invention.
Wherein:
1-standard source collecting transient data system, 101-shunt, 102-information conditioning module, 103-analog-to-digital conversion module, 104-sampling unit, unit during 105-first couple, the tested electronic current mutual inductor of 2-, 3-tested electronic current mutual inductor collecting transient data system, 301-collecting unit, 302-merge cells, 4-fiber optical transceiver, 5-wireless transceiver system, 501-wireless sending module, 502-wireless receiving module, 6-Transient Signal Processing system, 601-Signal reception fpga chip, unit during 602-second couple, 603-transient signal analytic unit.
Embodiment
The invention provides the online transient test system of a kind of electronic current mutual inductor, solve the problem that the transient state progress of disease measuring accuracy of electronic current mutual inductor of the prior art is lower.
Technical scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, 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, should belong to the scope of protection of the invention.
The online transient test system of electronic current mutual inductor provided by the invention, comprises standard source collecting transient data system 1, tested electronic current mutual inductor 2, tested electronic current mutual inductor collecting transient data system 3 and Transient Signal Processing system 6; Described standard source collecting transient data system 1 is arranged on the position near described tested electronic current mutual inductor primary side system.Described standard source collecting transient data system 1 is communicated to connect by wireless transceiver system 5 with described Transient Signal Processing system 6; Described tested electronic current mutual inductor 2, tested electronic current mutual inductor collecting transient data system 3 and Transient Signal Processing system 6 are electrically connected successively.
From above technical scheme, the online transient test system of electronic current mutual inductor provided by the invention, by the transient heavy current of Measurement accuracy primary side system, and make it first by after standard source collecting transient data system, again by tested electronic current mutual inductor 2, the transient signal eventually passing through both is all received also by Transient Signal Processing system 6, so namely the former can be used as the criterion of transient characterisitics quality when tested mutual inductor breaks down in true operation, compare current online transient test system, transient test system provided by the invention more can reflect the transient characterisitics precision of tested mutual inductor really.
The present invention, by the operation in-site installation at tested mutual inductor, utilizes wireless transceiver system technology that standard source data are sent to Transient Signal Processing and leads to, complete the online transient test of electronic mutual inductor.Detection system of the present invention is in running always, when discovery primary side system has transient state process, then completes a transient state and detects, and enter in transient state process wait next time.The method has versatility; electronic current mutual inductor transient characterisitics can be made to test this important test job and to be no longer confined to other specialized laboratory extremely individual; the transient test ability that electronic current mutual inductor scene is run can be improved; improve the safety and reliability of intelligent grid relay protection device protection act when fault occurs, for the safe and stable operation of electrical network provides safeguard.
In the online transient test system of above-mentioned electronic current mutual inductor, described standard source collecting transient data system comprises the shunt 101, Signal-regulated kinase 102, analog-to-digital conversion module 103 and the sampling fpga chip that are electrically connected successively, and another output terminal of described shunt 101 is electrically connected with described tested electronic current mutual inductor 2; As shown in Figure 1, when breaking down from an examining system, the transient current part produced is by shunt 101, and transient heavy current is converted to small magnitude voltage signal and deliver to Signal-regulated kinase 102, another part transient heavy current directly enters tested electronic current mutual inductor 2.Adopt shunt 101 as transient state standard source effectively improve transient state process sampling precision and not by the impact of the factors such as electromagnetic transient such as iron core cutter.Above-mentioned information conditioning module 102 is by voltage signal conditioning to the collectable voltage range of modulus acquisition module, and after analog to digital conversion, the collection of sampling fpga chip is as the transient information of standard source.Described wireless transceiver system comprises wireless sending module 501 and wireless receiving module 502; The input end of described wireless sending module 501 is electrically connected with described sampling fpga chip, the input end of output terminal and described wireless receiving module 502 communicates to connect; The output terminal of described wireless receiving module 502 is electrically connected with described Transient Signal Processing system 6.The transient signal gathering fpga chip collection is communicated with Transient Signal Processing system 6 by wireless sending module 501.Adopt wireless communication technology, standard source sampling unit and Transient Signal Processing system are without physical connection, and insulating reliability is high.
In the online transient test system of above-mentioned electronic current mutual inductor, described tested electronic current mutual inductor collecting transient data system bag 3 draws together the collecting unit 301 and merge cells 302 that are electrically connected successively, described collecting unit 301 and described tested electronic current mutual inductor 2 are electrically connected, and described merge cells 301 is electrically connected with described Transient Signal Processing system 6 by fiber optical transceiver 4.
In order to eliminate in transient information transport process, in standard source sampling, the sampling time sequence that causes and Transient Signal Processing is synchronous, unit 105 when described sampling fpga chip comprises sampling unit 104 and first pair, described sampling unit 104 and first pair time unit 105 be all electrically connected with described wireless sending module 502.Unit 602 and transient signal analytic unit 603 when described Transient Signal Processing system 6 comprises the Signal reception fpga chip 601, second pair be electrically connected successively, described Signal reception fpga chip 601 and second pair time unit 602 be all electrically connected with described wireless receiving module 502.When first pair unit 105 by with unit 602 radio communication when second pair, according to the sampling beat of the sequential beat of signal transacting adjustment sampling unit 104, and send sampled data by wireless sending module 501 after stamping markers by ordered pair sampled data time described.Synchronization accuracy University of Science and Technology 10us when adopting wireless 1588 couples, thus the precision improving the online transient test of the present invention.
In actual applications, following hardware device can be adopted to build above-mentioned Transient Signal Processing system: electronic current mutual inductor transient state wireless test main frame and host computer, the Signal reception fpga chip in main frame receives the Temporal Data from the standard source transient signal of wireless receiving module transmission and the tested electronic current mutual inductor via the forwarding of optical fiber transferring and receiving apparatus.Main frame by wireless transceiver system complete to sampling unit pair time and after realizing the high speed real-time Transmission of sampled data, complete sampled-data processing and pack and be responsible for communicating with host computer.
Test Host adopts High Accuracy Constant Temperature crystal oscillator to ensure the sequential of whole test macro, host computer gathers from the digital signal of standard source and the digital signal from tested mutual inductor respectively, and carry out time domain alignment according to the time relationship of these two groups of signals, these two groups of signals are carried out to the real time discriminating of Sudden Changing Rate simultaneously, namely think that Sudden Changing Rate occurs when discovery Sudden Changing Rate is greater than to arrange definite value and continue 2ms.Record standard source sudden change moment t1, and extract fundamental phase φ 1, system frequency f now; Record measured sudden change moment t2, and extract fundamental phase φ 2 now.Because the collection of standard source signal and the collection of measured number signal control asynchronous and sampling rate is also inconsistent based on respective crystal oscillator, so the time must be asynchronous, thus t1 moment and t2 moment must contain sampling asynchronous time; Simultaneously, due to the discretize of digital quantity, instantaneous value and the instantaneous value in measured sudden change moment in standard source sudden change moment must be discrepant, the difference of this instantaneous value was also reflected on the mistiming in t1 moment and t2 moment simultaneously, main frame carries out transient test process after compensating these mistimings in time domain again, completes the transient state instantaneous value accuracy test, transient state delay test, attenuation constant test etc. of electronic current mutual inductor in system failure process.Visible, the test error that the time domain error in the markers demarcation link of the wireless transmission after can eliminating analog to digital conversion like this brings.Adopt Sudden Changing Rate to determine initial time, utilize algorithm correction standard source and test product mistiming, eliminate the asynchronous impact brought to instantaneous value error of sampling.
In addition, the electric power loop of wireless transient state sampling front end units by get can coil from circuit get energy after the progress of disease can be processed by power module after provide stable voltage signal to provide power supply for whole wireless transient state front end units of sampling, arrange without external power supply, make the structure of whole Online Transaction Processing more succinct, and range of application is wider.Online Transaction Processing compatibility provided by the invention is comparatively strong, and the electronic mutual inductor type of support has: electricity and optics, low pressure and high pressure, all kinds of protocol type (IEC61850-9-1, IEC61850-9-2LE, state net IEC61850-9-2, IEC60044-8FT3, state net FT3).
Below, a concrete application example will be enumerated to further illustrate content of the present invention.In this test macro front end units, shunt designs according to In/0.05V, meet the transient current test request of electronic current mutual inductor 50 times, the signal of signal condition loop to shunt arranges the collection requirement meeting ADC, the sampling rate of ADC is every cycle 400 point, select 24 ∑-△ framework high-performance analog to digital converter ADS1271, to ensure that enough bandwidth sum precision obtain real primary current waveform.FPGA adopts the Spartan3 series of products XC3S1500 of Xilinx, and utilize radio communication to communicate with Test Host, radio communication frequency is 2.4GHz.Get can coil and power module according to 1% rated current design namely when system power is more than 1% system can normally work, the wireless transient state sampling front end units whole system wake-up time is less than 1ms.
In Test Host, fiber optical transceiver adopts AgilentAFBR5803, radio receiving transmitting module is consistent with the model that front end units adopts, FPGA adopts the Spartan3 series of products XC3S1500 of Xilinx to realize Ethernet sampled value and the reception of wireless sampled value of MU, FPGA adopts constant-temperature crystal oscillator, carry out precise time demarcation to each sampled value, the time jitter receiving link can control in nanosecond rank by the capability of sequential control that FPGA is good.
Adopt the MPC8247 embedded microprocessor of Freescale company, this processor belongs to PowerQUICCII series, comprises a kernel based on PowerPCMPC603e, and a communication process kernel CPM.Microprocessor carries out Sudden Changing Rate differentiation to standard source signal and measured signal simultaneously, and the computing formula of Sudden Changing Rate is as follows:
△ i=| [i (t)-i (t-T)] – [i (t-T)-i (t-2T)] |, t is current time, T is a power frequency cycle time, i.e. 20ms, Sudden Changing Rate starts 20% of threshold Iset power taking type current transformer ratings, as △ I >=Iset, and when continuing 2ms, be judged to be that Sudden Changing Rate occurs.Host computer carries out transient analysis according to the sudden change generation moment in sampled signal, by standard source signal and test product signal at one time axle carry out computational analysis, thus complete the transient state instantaneous value accuracy test, transient state delay test, attenuation constant test etc. of electronic current mutual inductor in system failure process.
By the description of above embodiment of the method, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: ROM (read-only memory) (ROM), random access memory (RAM), magnetic disc or CD etc. various can be program code stored medium.
It should be noted that, in this article, the such as relational terms of " first " and " second " etc. and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the specific embodiment of the present invention, those skilled in the art is understood or realizes the present invention.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. the online transient test system of electronic current mutual inductor, is characterized in that, comprises standard source collecting transient data system, tested electronic current mutual inductor, tested electronic current mutual inductor collecting transient data system and Transient Signal Processing system; Described standard source collecting transient data Operation system setting is in the position near described tested electronic current mutual inductor primary side system; Described standard source collecting transient data system and described Transient Signal Processing system are communicated to connect by wireless transceiver system; Described tested electronic current mutual inductor, tested electronic current mutual inductor collecting transient data system and Transient Signal Processing system are electrically connected successively.
2. the online transient test system of electronic current mutual inductor according to claim 1, is characterized in that, described standard source collecting transient data system comprises the shunt, Signal-regulated kinase, analog-to-digital conversion module and the sampling fpga chip that are electrically connected successively; Described wireless transceiver system comprises wireless sending module and wireless receiving module; Another output terminal of described shunt is electrically connected with described tested electronic current mutual inductor; The input end of described wireless sending module is electrically connected with described sampling fpga chip, the input end of output terminal and described wireless receiving module communicates to connect; The output terminal of described wireless receiving module is electrically connected with described Transient Signal Processing system.
3. the online transient test system of electronic current mutual inductor according to claim 1, it is characterized in that, described tested electronic current mutual inductor collecting transient data system comprises the collecting unit and merge cells that are electrically connected successively, described collecting unit and described tested electronic current mutual inductor electrical connection, described merge cells is electrically connected with described Transient Signal Processing system by fiber optical transceiver.
4. the online transient test system of electronic current mutual inductor according to claim 2, it is characterized in that, unit when described sampling fpga chip comprises sampling unit and first pair, described sampling unit and first pair time unit be all electrically connected with described wireless sending module.
5. the online transient test system of electronic current mutual inductor according to claim 1, it is characterized in that, described Transient Signal Processing system comprise Signal reception fpga chip, second pair time unit and transient signal analytic unit, described Signal reception fpga chip and second pair time unit be all electrically connected with described wireless receiving module, described transient signal analytic unit is electrically connected with described Signal reception fpga chip.
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| CN105842645A (en) * | 2016-06-06 | 2016-08-10 | 中国南方电网有限责任公司电网技术研究中心 | Electronic transformer on-line monitoring device and monitoring method |
| CN106093825A (en) * | 2016-07-26 | 2016-11-09 | 中国南方电网有限责任公司电网技术研究中心 | A kind of device of optical transformer fault diagnosis |
| CN107967990A (en) * | 2017-11-23 | 2018-04-27 | 安徽鑫绿源电子科技有限公司 | A kind of electronic mutual inductor |
| CN108508398A (en) * | 2018-03-30 | 2018-09-07 | 中国西电电气股份有限公司 | A kind of multi channel currents transformer transient error testing device |
| CN108508399A (en) * | 2018-04-02 | 2018-09-07 | 国网安徽省电力有限公司电力科学研究院 | Voltage transient test method based on the emulation of electronic type voltage transformer transmittance process |
| CN110470173A (en) * | 2019-07-12 | 2019-11-19 | 中国人民解放军海军工程大学 | Cannon, which is raised, supplies mechanics of system state aware bullet and its test method |
| CN111025220A (en) * | 2019-12-11 | 2020-04-17 | 中国电力科学研究院有限公司 | Non-traditional current transformer transient characteristic verification method and system |
| CN113655274A (en) * | 2021-08-30 | 2021-11-16 | 西安交通大学 | System and method for detecting transient transmission performance of combined electronic transformer |
| CN114113747A (en) * | 2021-11-19 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Direct current transient state step standard device of TMR sensor |
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| CN108508399A (en) * | 2018-04-02 | 2018-09-07 | 国网安徽省电力有限公司电力科学研究院 | Voltage transient test method based on the emulation of electronic type voltage transformer transmittance process |
| CN110470173A (en) * | 2019-07-12 | 2019-11-19 | 中国人民解放军海军工程大学 | Cannon, which is raised, supplies mechanics of system state aware bullet and its test method |
| CN110470173B (en) * | 2019-07-12 | 2021-07-27 | 中国人民解放军海军工程大学 | Mechanical state sensing bullet of artillery raising supply and delivery system and testing method thereof |
| CN111025220A (en) * | 2019-12-11 | 2020-04-17 | 中国电力科学研究院有限公司 | Non-traditional current transformer transient characteristic verification method and system |
| CN113655274A (en) * | 2021-08-30 | 2021-11-16 | 西安交通大学 | System and method for detecting transient transmission performance of combined electronic transformer |
| CN114113747A (en) * | 2021-11-19 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Direct current transient state step standard device of TMR sensor |
| CN114113747B (en) * | 2021-11-19 | 2024-04-09 | 云南电网有限责任公司电力科学研究院 | Direct current transient step standard of TMR sensor |
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Application publication date: 20160511 |
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