CN102854424B - Electrical network booster stations are accessed and the monitoring method of site Electric Power Quality On-line Monitor System based on wind energy turbine set - Google Patents
Electrical network booster stations are accessed and the monitoring method of site Electric Power Quality On-line Monitor System based on wind energy turbine set Download PDFInfo
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Abstract
Electrical network booster stations are accessed and the monitoring method of site Electric Power Quality On-line Monitor System based on wind energy turbine set.It relates to the monitoring method of electrical network Electric Power Quality On-line Monitor System.It is not still specifically designed to the system of the quality of power supply of the wind energy turbine set of on-line monitoring access electrical network for solving current China, cannot meet and ensure that the problem of the system and method for real-time quality of power supply on-line monitoring is carried out safely in the stabilization of power grids.The voltage and current signal input part of voltage, current signal barrier assembly is connected with the voltage and current signal output part of external voltage, current transformer respectively; The signal output part of voltage, current signal transition components connects multichannel synchronousing collection card signal input end; The collection signal output terminal of multichannel synchronousing collection card is connected with the collection signal input end of core controller; The storage data I/O of core controller is connected with the storage data I/O of storer; The display input end of display is connected with the display output terminal of core controller.It is applicable to the booster stations of wind energy turbine set.
Description
Technical field
The present invention relates to the monitoring method of electrical network Electric Power Quality On-line Monitor System.
Background technology
Along with the progress of science and technology, new forms of energy are more and more subject to people's attention as a kind of environmental protection, the clean energy; Wind-power electricity generation, with its environmental protection, energy-conservation feature, progressively expands usable range.But due to the method for operation of aerogenerator and natural conditions closely related, aerogenerator has its singularity, namely randomness, uncontrollability and anti-peak regulation that the continuity of operation, wind energy turbine set export cannot be ensured, be unfavorable for the operation of electrical network, the power supply quality of meeting to electrical network, as voltage, harmonic wave and flickering, frequency and stability etc. all can have an impact.For the wind energy turbine set entering electrical network, for ensureing the safe operation of wind energy turbine set and electrical network, Chinese Electricity Monitoring Commission and State Grid Corporation of China have promulgated the technical standard about wind energy turbine set access electrical network.Clear stipulaties has been made to the quality of power supply of the wind energy turbine set access point of access electrical network.In view of wind-power electricity generation singularity, wind energy turbine set and the access fuel-burning power plant of electrical network, the hydraulic power plant of access electrical network, the behavior be in operation has very big difference.Current China is not still specifically designed to the monitoring system of the quality of power supply of the wind energy turbine set of on-line monitoring access electrical network, cannot meet for ensureing that stabilization of power grids safety carries out the system of real-time quality of power supply on-line monitoring for wind energy turbine set access electrical network.
Summary of the invention
The present invention is not still specifically designed to the system of the quality of power supply of the wind energy turbine set of on-line monitoring access electrical network in order to solve current China, cannot meet for ensureing that stabilization of power grids safety carries out the problem of the system and method for real-time quality of power supply on-line monitoring for wind energy turbine set access electrical network; And propose based on wind energy turbine set access electrical network booster stations the monitoring method of site Electric Power Quality On-line Monitor System.
Wind energy turbine set accesses electrical network booster stations and site Electric Power Quality On-line Monitor System, and it comprises voltage signal barrier assembly, voltage signal transition components, current signal barrier assembly, current signal transition components, multichannel synchronousing collection card, core controller, storer and display; The voltage signal inputs of voltage signal barrier assembly is connected with the voltage signal output end of external voltage mutual inductor; The voltage signal output end of voltage signal barrier assembly is connected with the voltage signal inputs of voltage signal transition components; The voltage signal output end of described voltage signal transition components is connected with the voltage signal inputs of multichannel synchronousing collection card; The current signal input end of current signal barrier assembly is connected with the current signal output end of foreign current mutual inductor; The current signal output end of current signal barrier assembly is connected with the current signal input end of current signal transition components; The current signal output end of described current signal transition components is connected with the current signal input end of multichannel synchronousing collection card; The collection signal output terminal of described multichannel synchronousing collection card is connected with the collection signal input end of core controller; The storage data I/O of described core controller is connected with the storage data I/O of storer; The display input end of described display is connected with the display output terminal of core controller.
Wind energy turbine set of the present invention accesses electrical network booster stations and site Electric Power Quality On-line Monitor System has the function that on-line monitoring accesses the quality of power supply of the wind energy turbine set of electrical network.Multi-channel synchronous monitoring sampling is carried out by voltage signal barrier assembly 1, voltage signal transition components 2, current signal barrier assembly 3 and current signal transition components 4 pairs of wind energy turbine set access electrical network main-transformer high and low pressure sides; Achieve timing electric energy quality monitoring and data storage, achieve the automatic startup record of instantaneous overvoltage and temporary overvoltage waveform simultaneously, achieve all monitoring variables about the quality of power supply 7 standards in whole national standard, steady state measurement and transient measuring are merged into a single whole.And achieve grid company by data communication module 9 to be automatically connected with power scheduling remote data base the Monitoring Data of wind energy turbine set booster stations access point, facilitate the examination of power scheduling to wind energy turbine set stability, enhance the safety of electrical network.The present invention can be used in the booster stations of wind energy turbine set widely.
Accompanying drawing explanation
Fig. 1 is the wind energy turbine set access electrical network booster stations the modular structure schematic diagram of site Electric Power Quality On-line Monitor System described in embodiment one; Fig. 2 is the wind energy turbine set access electrical network booster stations the modular structure schematic diagram of site Electric Power Quality On-line Monitor System described in embodiment two; Fig. 3 is the wind energy turbine set access electrical network booster stations the modular structure schematic diagram of site Electric Power Quality On-line Monitor System described in embodiment three; Fig. 4 is the wind energy turbine set access electrical network booster stations the modular structure schematic diagram of site Electric Power Quality On-line Monitor System described in embodiment four.
Embodiment
Embodiment one: composition graphs 1 illustrates present embodiment, wind energy turbine set described in present embodiment accesses electrical network booster stations and site Electric Power Quality On-line Monitor System, and it comprises voltage signal barrier assembly 1, voltage signal transition components 2, current signal barrier assembly 3, current signal transition components 4, multichannel synchronousing collection card 5, core controller 6, storer 7 and display 8; The voltage signal inputs of voltage signal barrier assembly 1 is connected with the voltage signal output end of external voltage mutual inductor; The voltage signal output end of voltage signal barrier assembly 1 is connected with the voltage signal inputs of voltage signal transition components 2; The voltage signal output end of described voltage signal transition components 2 is connected with the voltage signal inputs of multichannel synchronousing collection card 5; The current signal input end of current signal barrier assembly 3 is connected with the current signal output end of foreign current mutual inductor; The current signal output end of current signal barrier assembly 3 is connected with the current signal input end of current signal transition components 4; The current signal output end of described current signal transition components 4 is connected with the current signal input end of multichannel synchronousing collection card 5; The collection signal output terminal of described multichannel synchronousing collection card 5 is connected with the collection signal input end of core controller 6; The storage data I/O of described core controller 6 is connected with the storage data I/O of storer 7; The display input end of described display 8 is connected with the display output terminal of core controller 6.
Embodiment two: composition graphs 2 illustrates present embodiment, present embodiment and embodiment one difference are to it also increases data communication module 9; The communication data I/O of described data communication module 9 is connected with the communication data I/O of core controller 6.Other composition is identical with embodiment one with connected mode.
Embodiment three: composition graphs 3 illustrates present embodiment, present embodiment and embodiment one or two difference are to it also increases PQDIF file converteractivemil builder activemil builder 10; The file data input end of described PQDIF file converteractivemil builder activemil builder 10 is connected with the file data output terminal of core controller 6; The file data output terminal of described PQDIF file converteractivemil builder activemil builder 10 is connected with the file data input end of data communication module 9.Other composition is identical with embodiment one or two with connected mode.Increasing PQDIF file converteractivemil builder activemil builder 10 is that the data file transition received is become quality of power supply international standard PQDIF file layout.
Embodiment four: composition graphs 4 illustrates present embodiment, present embodiment and embodiment three difference are described printer 11, and the print data input end of printer 11 is connected with the print data output terminal of PQDIF file converteractivemil builder activemil builder 10.Other composition is identical with embodiment three with connected mode.The object increasing printer 11 is can print PQDIF file at any time as required.
Embodiment five: present embodiment and embodiment four difference are that described data communication module 9 adopts cable network data communication module or wireless data communication module.Other composition is identical with embodiment five with connected mode.
Principle of work of the present invention:
When wind energy turbine set is incorporated into the power networks by booster stations, accessed into voltage and current respectively by mutual inductor by booster stations main-transformer high and low pressure side by voltage signal barrier assembly 1, voltage signal transition components 2, current signal barrier assembly 3 and current signal transition components 4, and each electric parameters after isolation conversion is outputted in multichannel synchronousing collection card 5.Multichannel synchronousing collection card 5 adopts high speed synchronous sample card, and the sampled signal be subject to is sent to core controller 6 and completes the measurements and calculations function of every power quality parameter by multichannel synchronousing collection card 5, and data is automatically stored in storer 7.The data received and waveform show by display 8.Increase data communication module 9 and PQDIF file converteractivemil builder activemil builder 10 are the data transmission systems in order to coordinate the wind farm grid-connected situation of grid company Real-Time Monitoring to develop, and automatically data file are uploaded to dispatching center's database.
Voltage signal barrier assembly 1, current signal barrier assembly 3 access voltage and current by booster stations main-transformer high-pressure side by mutual inductor, access phase voltage Ua, Ub and Uc, phase current Ia, Ib and Ic, the electric parameters that can gather calculating is like this on high-tension side phase voltage of main-transformer, phase current, active power and reactive power.These electric parameters accessed all are isolated the voltage signal converted to lower than 10V, then all signals is outputted in multichannel synchronousing collection card 5.The passage of multichannel synchronousing collection card 5 can be arranged to arbitrarily current channel or voltage channel, so just can adapt to the booster stations situation of different wind energy turbine set easily, reach versatility.
Observation process: the electric pressure of the wind energy turbine set booster stations high voltage side of transformer of monitoring as required sets cycle of calculating of the timing such as deviation, harmonic wave, voltage fluctuation and flicker, tri-phase unbalance factor, frequency departure of different voltage starting values, setting frequency acquisition, data record size, voltage, gathers master routine and starts simultaneously.The Measurement channel by signal isolation converting member 1 electric signal of voltage transformer (VT) summation current transformer being accessed this device carries out real time on-line monitoring, after collecting half-full data, start to transmit this half-full data by monitoring capture program, multichannel synchronousing collection card 2 then proceeds next half-full data acquisition.The current half-full data of program computation, the filtered peak value of each voltage channel obtained, compare with the initial value of each path setting before, if the difference that passage compares arbitrarily does not all exceed the initiation value of respective channel, then current peak value is set to new initial value, continue to wait for and new half-fullly compare data acquisition and complete, carry out the comparison circulated; If the difference that a certain passage compares has exceeded initiation value, then start the data recording all passages, the continuous record time span of 5 seconds, simultaneously using the beginning of upper half-full data as record, the complete waveform curve before the waveform obtained so then comprises change in voltage and after change.After the data having recorded 5 seconds time span, the data of record are carried out the data processings such as filtering, final data is stored in storer 4, proceeds data acquisition.Core controller 3 by inner setting threshold value or wind energy turbine set booster stations and site for change in voltage situation, whether reach quality of power supply requirement with what judge wind energy turbine set access electrical network.
The Timing measurement of other steady state voltage amounts is according to Initialize installation, in predetermined time interval, be extracted in current half-full data, carry out the calculating such as the deviation of voltage, harmonic wave, voltage fluctuation and flicker, tri-phase unbalance factor and frequency departure, after the power quality data value such as various voltages, electric current obtained processes, obtain stable quality of power supply numerical value, each numerical value and corresponding time are stored.The quality of power supply numerical value that timing stores and time, finally provide long quality of power supply statistical value, device can the Coutinuous store quality of power supply mass figures of a year.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For this person of an ordinary skill in the technical field, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of patent protection that claims that the present invention submits to are determined.
Claims (5)
1. access electrical network booster stations and the monitoring method of site Electric Power Quality On-line Monitor System based on wind energy turbine set, described monitoring system comprises voltage signal barrier assembly (1), voltage signal transition components (2), current signal barrier assembly (3), current signal transition components (4), multichannel synchronousing collection card (5), core controller (6), storer (7) and display (8); The voltage signal inputs of voltage signal barrier assembly (1) is connected with the voltage signal output end of external voltage mutual inductor; The voltage signal output end of voltage signal barrier assembly (1) is connected with the voltage signal inputs of voltage signal transition components (2); The voltage signal output end of described voltage signal transition components (2) is connected with the voltage signal inputs of multichannel synchronousing collection card (5); The current signal input end of current signal barrier assembly (3) is connected with the current signal output end of foreign current mutual inductor; The current signal output end of current signal barrier assembly (3) is connected with the current signal input end of current signal transition components (4); The current signal output end of described current signal transition components (4) is connected with the current signal input end of multichannel synchronousing collection card (5); The collection signal output terminal of described multichannel synchronousing collection card (5) is connected with the collection signal input end of core controller (6); The storage data I/O of described core controller (6) is connected with the storage data I/O of storer (7); The display input end of described display (8) is connected with the display output terminal of core controller (6);
It is characterized in that described monitoring method is voltage signal barrier assembly (1), current signal barrier assembly (3) is by booster stations main-transformer high-pressure side access voltage and current, access phase voltage Ua, Ub and Uc, phase current Ia, Ib and Ic, gathering the electric parameters calculated is the on high-tension side phase voltage of main-transformer, phase current, active power and reactive power, these electric parameters accessed all are isolated the voltage signal converted to lower than 10V, then all signals are outputted in multichannel synchronousing collection card (5), the passage of multichannel synchronousing collection card (5) can be arranged to arbitrarily current channel or voltage channel, so just can adapt to the booster stations situation of different wind energy turbine set easily, reach versatility,
Observation process:
Step one, the electric pressure of the wind energy turbine set booster stations high voltage side of transformer of monitoring as required sets different voltage starting values, setting frequency acquisition, data record size, the deviation of voltage, harmonic wave, voltage fluctuation and flicker, tri-phase unbalance factor, the cycle of the timing calculating of frequency departure, gather master routine to start simultaneously, the Measurement channel by signal isolation converting member 1 electric signal of voltage transformer (VT) summation current transformer being accessed this device carries out real time on-line monitoring, after collecting half-full data, start to transmit this half-full data by monitoring capture program, multichannel synchronousing collection card (5) then proceeds next half-full data acquisition,
The current half-full data of step 2, program computation, the filtered peak value of each voltage channel obtained, compare with the initial value of each path setting before, if the difference that passage compares arbitrarily does not all exceed the initiation value of respective channel, then current peak value is set to new initial value, continue to wait for and new half-fullly compare data acquisition and complete, carry out the comparison circulated;
If the difference that a certain passage of step 3 compares has exceeded initiation value, then start the data recording all passages, the continuous record time span of 5 seconds, simultaneously using the beginning of upper half-full data as record, the complete waveform curve before the waveform obtained so then comprises change in voltage and after change;
Step 4, after the data having recorded 5 seconds time span, the data of record are carried out the data processings such as filtering, final data is stored in storer (4), proceeds data acquisition;
Step 5, core controller (3) by inner setting threshold value or wind energy turbine set booster stations and site for change in voltage situation, with judge wind energy turbine set access electrical network whether reach quality of power supply requirement.
2. according to claim 1 based on wind energy turbine set access electrical network booster stations the monitoring method of site Electric Power Quality On-line Monitor System, it is characterized in that it also comprises data communication module (9); The communication data I/O of described data communication module (9) is connected with the communication data I/O of core controller (6).
3. according to claim 1 and 2 based on wind energy turbine set access electrical network booster stations the monitoring method of site Electric Power Quality On-line Monitor System, it is characterized in that it also comprises PQDIF file converteractivemil builder activemil builder (10); The file data input end of described PQDIF file converteractivemil builder activemil builder (10) is connected with the file data output terminal of core controller (6); The file data output terminal of described PQDIF file converteractivemil builder activemil builder (10) is connected with the file data input end of data communication module (9).
4. according to claim 3 based on wind energy turbine set access electrical network booster stations the monitoring method of site Electric Power Quality On-line Monitor System, it is characterized in that it also comprises printer (11), the print data input end of printer (11) is connected with the print data output terminal of PQDIF file converteractivemil builder activemil builder (10).
5. according to claim 4 based on wind energy turbine set access electrical network booster stations the monitoring method of site Electric Power Quality On-line Monitor System, it is characterized in that described data communication module (9) adopts cable network data communication module or wireless data communication module.
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| CN103487625A (en) * | 2013-09-13 | 2014-01-01 | 国家电网公司 | Electric system transient waveform storage monitoring system and monitoring method thereof |
| CN108387801B (en) * | 2018-03-28 | 2024-05-17 | 华电电力科学研究院有限公司 | Wind power station electric energy quality testing device and testing method |
| CN111650465A (en) * | 2020-07-18 | 2020-09-11 | 国网山西省电力公司电力科学研究院 | Voltage and current split type electric energy quality measuring device and method for intelligent substation |
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