CN104659794A - Unit PSS positive damping effectiveness rolling checking method based on multi-data source power grid - Google Patents
Unit PSS positive damping effectiveness rolling checking method based on multi-data source power grid Download PDFInfo
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Abstract
The invention provides a unit PSS (Packet Switching Service) positive damping effectiveness rolling checking method based on a multi-data source power grid. The unit PSS positive damping effectiveness rolling checking method comprises the following steps: driving regional power grid disturbance events, and collecting the electric power fluctuation data of each recording device; step two, carrying out data preprocessing on the electric power fluctuation data respectively, and forming multi-data sources of unit PSS positive damping effectiveness checking; step three, calculating corresponding damping ratios and oscillation frequencies in the disturbance event fluctuation process according to the data sources, wherein the computed results are contrasted to each other; step four, referring to the unit PSS positive damping requirement of the power grid side, and evaluating whether the unit PSS positive damping in disturbance events is effective; if yes, ending the checking process; if not, continuously turning to step five; step five, contrasting the similarity of a main outgoing line and a power plant outgoing line power curve, and positioning that the abnormality of unit PSS occurs at the position of which unit of which power plant. The method realizes that problems existing in unit PSS are discovered as soon as possible, and the unit PSS plays a necessary role in the dynamic stabilizing process of the regional power grid.
Description
Technical field
The present invention relates to the Dynamic Stability Control technology application of electric power system stability control technical field, especially relate to a kind of area power grid unit PSS positive damping validity rolling Verification Technology field based on multi-data source.
Background technology
For suppressing network re-active power low-frequency oscillation, technological means main is at present generator excited system additional longitudinal forces, i.e. power system stabilizer, and therefore the correct work of unit PSS, for improving area power grid dynamic stability, significant.PSS puts into operation after field test, due to the restriction of field test condition, can not verify the validity of PSS to various oscillation mode positive damping; More seriously, after putting into operation, unit PSS also because hardware and software fault, may cause PSS operation irregularity, and this exception can not identify in normal operation, can only find by the positive damping of PSS in disturbance event process is extremely next.
Summary of the invention
The object of the invention is to the defect overcoming prior art, there is provided based on multi-data source electrical network unit PSS positive damping validity rolling check method, once there is disturbance event in area power grid, at once carry out unit PSS positive damping validity to check, with the appearance Complete Synchronization of area power grid disturbance event, continuous rolling, finds unit PSS Problems existing early, ensures that unit PSS plays due effect in area power grid dynamic stability process.
The technical scheme realizing above-mentioned purpose is:
The present invention is a kind of based on multi-data source electrical network unit PSS positive damping validity rolling check method, wherein:
Step one, when regional grid disturbance event-driven, collects by the electric power fluctuation number certificate of each tape deck to interconnection and unit record;
Step 2, to power fluctuation number electric described in each according to carrying out data prediction respectively, to form the multi-data source that described unit PSS positive damping validity is checked, wherein:
Described data prediction, comprise record data form normalized, different device record disturbance event generation initial sum termination the moment alignment;
Step 3, according to data source described in each, calculates damping ratio and the frequency of oscillation of each correspondence in described disturbance event wave process, then contrasts each other between result of calculation;
Whether effective step 4, with reference to grid side to described unit PSS positive damping requirement, assess unit PSS positive damping in described disturbance event;
If it is effective to assess described unit PSS positive damping, check process terminates;
If it is invalid to assess described unit PSS positive damping, continue to forward step 5 to;
Step 5, theoretical based on waveform similarity, carry out trunk and send the similitude contrast that circuit and power plant send line power curve, first locate described unit PSS is abnormal occurs in for which power plant, then the power curve based on each unit PSS of described power plant compares, unit position, final orientation problem place;
Step 6, according to above-mentioned steps, circulation is checked, and finds that whether unit PSS positive damping is effective.
Above-mentioned based on multi-data source electrical network unit PSS positive damping validity rolling check method; wherein, the electric power fluctuation number certificate of described step one comprises area power grid EMS EMS data, synchronously to quantity collection system PMU data, fault recorder data, protective relaying device data, DCgenerator motor field adjuster record data.
The invention has the beneficial effects as follows: the invention provides based on multi-data source area power grid unit PSS positive damping validity check method, once there is disturbance event in area power grid, at once carry out unit PSS positive damping validity to check, with the appearance Complete Synchronization of area power grid disturbance event, continuous rolling, find unit PSS Problems existing early, timely rectification, avoid unit PSS because the hardware of the improper or device self of setting parameter, software fault cause unit PSS to cause operation troubles, ensure that unit PSS plays due effect in area power grid dynamic stability process.
Accompanying drawing explanation
Fig. 1 is that area power grid unit PSS positive damping validity of the present invention checks flow chart.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1, the present invention is based on multi-data source electrical network unit PSS positive damping validity rolling check method, wherein,
Step one, when regional grid disturbance event-driven, collects by the electric power fluctuation number certificate of each tape deck to interconnection and unit record;
Step 2, to power fluctuation number electric described in each according to carrying out data prediction respectively, to form the multi-data source that described unit PSS positive damping validity is checked, wherein:
Described data prediction, under same disturbance event by the electric power fluctuation number of said apparatus record according to carrying out preliminary treatment, comprise the alignment in disturbance event generation initial sum termination moment of record data form normalized, different device record;
Step 3, according to data source described in each, calculates damping ratio and the frequency of oscillation of each correspondence in described disturbance event wave process, then contrasts each other between result of calculation;
Whether effective step 4, with reference to grid side to described unit PSS positive damping requirement, assess unit PSS positive damping in described disturbance event;
If it is effective to assess described unit PSS positive damping, check process terminates;
If it is invalid to assess described unit PSS positive damping, continue to forward step 5 to;
Step 5, theoretical based on waveform similarity, carry out trunk and send the similitude contrast that circuit and power plant send line power curve, first locate described unit PSS is abnormal occurs in for which power plant, then the power curve based on each unit PSS of described power plant compares, unit position, final orientation problem place, rectifies and improves in time;
Step 6, according to above-mentioned steps, circulation is checked, and finds that whether unit PSS positive damping is effective.
The electric power fluctuation number certificate of described step one comprises area power grid EMS EMS data, synchronously to quantity collection system PMU data, fault recorder data, protective relaying device data, DCgenerator motor field adjuster record data.
For suppressing network re-active power low-frequency oscillation, technological means main is at present generator excited system additional longitudinal forces, i.e. power system stabilizer.PSS puts into operation after field test, and due to the restriction of field test condition, can not verify the validity of PSS to various oscillation mode positive damping, whether the normal work of the means that also there is no need to PSS monitors.
To above-mentioned multiple electric power fluctuation number certificate, calculate the technical parameters such as the damping ratio in its wave process, frequency of oscillation, the multiple result of calculations calculated by multiple data source contrast each other, last reference grid side, to unit PSS positive damping requirement, assesses relevant unit PSS positive damping validity in this perturbation process.
If check result has found problem, then Search and Orientation is carried out to the unit at problem place, circuit and power plant will be sent based on trunk sent the similitude contrast of line power curve here, and first problem unit be navigated to certain power plant; In this power plant, then compare based on the power curve of each unit, final orientation problem unit.
Once there is disturbance event in area power grid, namely carry out unit PSS positive damping validity to check, with the appearance Complete Synchronization of area power grid disturbance event, continuous rolling, find unit PSS Problems existing early, timely rectification, so can eliminate unit PSS because the hardware of the improper or device self of setting parameter, software fault cause PSS abnormal, ensure that unit PSS plays due effect in area power grid dynamic stability process.
In a word, the present invention has maximally utilised the data that various tape deck records in area power grid disturbance event process, the rolling achieving unit PSS positive damping validity is checked, can find that the unit PSS because setting parameter is improper and hardware and software failure causes is abnormal early, can ensure that unit PSS plays a positive role to area power grid dynamic stability, there is important engineer applied and be worth.
Below embodiment is to invention has been detailed description by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.Thus, some details in embodiment should not form limitation of the invention, the present invention by the scope that defines using appended claims as protection scope of the present invention.
Claims (2)
1., based on a multi-data source electrical network unit PSS positive damping validity rolling check method, it is characterized in that:
Step one, when regional grid disturbance event-driven, collects by the electric power fluctuation number certificate of each tape deck to interconnection and unit record;
Step 2, to power fluctuation number electric described in each according to carrying out data prediction respectively, to form the multi-data source that described unit PSS positive damping validity is checked, wherein:
Described data prediction, comprise record data form normalized, different device record disturbance event generation initial sum termination the moment alignment;
Step 3, according to data source described in each, calculates damping ratio and the frequency of oscillation of each correspondence in described disturbance event wave process, then contrasts each other between result of calculation;
Whether effective step 4, with reference to grid side to described unit PSS positive damping requirement, assess unit PSS positive damping in described disturbance event;
If it is effective to assess described unit PSS positive damping, check process terminates;
If it is invalid to assess described unit PSS positive damping, continue to forward step 5 to;
Step 5, theoretical based on waveform similarity, carry out trunk and send the similitude contrast that circuit and power plant send line power curve, first locate described unit PSS is abnormal occurs in for which power plant, then the power curve based on each unit PSS of described power plant compares, unit position, final orientation problem place;
Step 6, according to above-mentioned steps, circulation is checked, and finds that whether unit PSS positive damping is effective.
2. according to claim 1 based on multi-data source electrical network unit PSS positive damping validity rolling check method, it is characterized in that: the electric power fluctuation number certificate of described step one comprises area power grid EMS EMS data, synchronously to quantity collection system PMU data, fault recorder data, protective relaying device data, DCgenerator motor field adjuster record data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104993501A (en) * | 2015-07-03 | 2015-10-21 | 贵州电力试验研究院 | On-line evaluation method of low-frequency oscillation suppression performance of excitation regulator |
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| CN103219746A (en) * | 2013-04-28 | 2013-07-24 | 南京信息工程大学 | PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization |
| CN103236703A (en) * | 2013-01-29 | 2013-08-07 | 中国电力科学研究院 | Multiple-cluster PSS (packet switching service) coordination and optimization method for mitigating inside-and-outside correlative coupling |
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| CN103236703A (en) * | 2013-01-29 | 2013-08-07 | 中国电力科学研究院 | Multiple-cluster PSS (packet switching service) coordination and optimization method for mitigating inside-and-outside correlative coupling |
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| CN104993501A (en) * | 2015-07-03 | 2015-10-21 | 贵州电力试验研究院 | On-line evaluation method of low-frequency oscillation suppression performance of excitation regulator |
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