CN101988941A - Method, device and system for monitoring power quality - Google Patents
Method, device and system for monitoring power quality Download PDFInfo
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Abstract
The invention is suitable for the technical field of electric power, and provides a method, device and system for monitoring power quality. The method comprises the following steps: acquiring a transient state event of a pointed monitoring point; acquiring a first related event the time interval between which and the occurrence time of the transient state event is a system set delta T before the occurring time T0 of the transient state event of the pointed monitoring point; acquiring a second related event the time interval between which and the occurrence time of the transient state event is the a system set delta T before and after the occurring time T0 of transient state event of all the monitored points in a database; and analyzing the acquired first related event and second related event to generate a power quality monitoring report. In the invention, the efficiency and the accuracy rate for monitoring the power quality are improved, a technical reference is provided for the power safety production and stable operation; and the invention has remarkable economic and social benefits.
Description
Technical field
The invention belongs to the power technology field, relate in particular to a kind of electric energy quality monitoring method, Apparatus and system.
Background technology
Along with the continuous development of power technology, the user has also proposed very high requirement to electric energy quality monitoring.
Wherein, the electric energy quality monitoring analytic system should have two basic functions: monitoring function and analytic function.
Monitoring function mainly provides simple, the real-time displaying to quality of power supply characteristic, as harmonic spectrum figure, polar plot, Realtime Alerts etc., allows the user understand the situation of the real-time quality of power supply.Monitoring function is than the function that is easier to realize, does not need that the complicated processing of making comparisons just can realize to data.
Analytic function mainly is that the variation tendency to the quality of power supply, whether qualified, reason, coverage etc. are carried out deep processing, allows the user that specific quality of power supply incident is analysed in depth.
Analytic function is the function of more complicated.The realization of analytic function is to consider for certain monitoring point, the certain physical relation is being arranged between its each electric parameters sometime, and also having certain influence between the electric parameters owing to the interconnected characteristic different monitoring points of electrical network.Influencing each other between this electric parameters makes the in-depth analysis at specific quality of power supply phenomenon become possibility, but makes that also this analysis may be very complicated, need analyze lot of data in the database, influenced monitoring efficient.
And the electric energy quality monitoring analytic system substantially all is the discrete analysis at single power quality parameter, does not consider influencing each other between the power quality parameter, does not also consider the propagation of power quality parameter between the different monitoring points.Causing the electric energy quality monitoring analytic system on the market is not enough analyzing contour level analysis function aspects at the analysis of causes, the coverage of specific quality of power supply incident (especially transient power quality incident), especially aspect accuracy, can't satisfy the growing demand of user to analytic function.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of electric energy quality monitoring method that improves electric energy quality monitoring efficient and accuracy rate.
The embodiment of the invention is achieved in that a kind of electric energy quality monitoring method, said method comprising the steps of:
Obtain the transient event of specifying the monitoring point;
Obtain the transient event time of origin T of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin;
Obtain in the database all monitoring points at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin;
First dependent event and second dependent event obtained are analyzed, generated the electric energy quality monitoring report.
Another purpose of the embodiment of the invention is to provide a kind of equipment for monitoring power quality, and described device comprises:
Specify monitoring point transient event acquisition module, be used to obtain the transient event of specifying the monitoring point;
Specify monitoring point dependent event acquisition module, be used to obtain the transient event time of origin T of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin;
All monitoring point dependent event acquisition module is used for obtaining all monitoring points of database at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin;
Monitoring report generation module is used for first dependent event and second dependent event obtained are analyzed, and generates the electric energy quality monitoring report.
An also purpose of the embodiment of the invention is to provide a kind of electric energy quality monitoring system, and described system comprises the equipment for monitoring power quality that the embodiment of the invention provides.
The embodiment of the invention by obtain specify the monitoring point transient event at time of origin T
0First dependent event constantly in the Δ T time, and obtain all monitoring points at T
0Second dependent event constantly in the Δ T time, in conjunction with first dependent event and second dependent event transient event of specifying the monitoring point is analyzed, and generation electric energy quality monitoring report, the efficient and the accuracy rate of electric energy quality monitoring have been improved, for electric power safety production and stable operation provide useful Technical Reference, produce remarkable economic efficiency and social benefit.
Description of drawings
Fig. 1 is the process flow diagram of the electric energy quality monitoring method that provides of the embodiment of the invention;
Fig. 2 is the structural drawing of the equipment for monitoring power quality that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the flow process of the electric energy quality monitoring method that the embodiment of the invention provides.
In step S101, the electric energy quality monitoring data are saved to database.
In specific implementation process, the relevant SOE logout and the raw data of the transient event that records in the system read and be saved in the database.Wherein, the content of SOE logout comprises the eigenwert of eigenwert, event result and the correlation parameter of Time To Event, Event Priority, incident reason and correlation parameter.
The SOE record is a sequence of events recording; when power equipment generation remote signalling displacement such as switch changed position; corresponding remote measurement value when electrical protection apparatus or intelligent electric power instrument can be noted displacement time, displacement reason, switch trip automatically (for example corresponding three-phase current, active power etc.); form the SOE record, so that ex-post analysis.
In step S102, obtain the transient event of specifying the monitoring point.
In step S103, obtain the transient event time of origin T of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin.
In step S104, obtain in the database all monitoring points at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin.
Certainly, T
0The moment and T are the unified markers of whole electric power networks, be used to identify a certain moment that transient state time takes place, and apart from this T
0The time interval is the time range of Δ T constantly;
First dependent event and second dependent event obtained are analyzed, generated the electric energy quality monitoring report.
This step specifically comprises:
Analyze the reason of the transient event of described appointment monitoring point according to described first dependent event;
Analyze the initial place and the coverage of the transient event of described appointment monitoring point according to described second dependent event; For a certain selected transient event, program is carried out recursion forward or backward according to time sequencing, find out the SOE incident that all monitoring points in the one section incident in front and back take place this transient event, according to the sequencing of incident generation, thereby find out the loop and the affected loop of possibility that may cause this problem;
Generate the electric energy quality monitoring report according to above-mentioned analysis result.
Preferably, described electric energy quality monitoring is reported as text or statement form.
The embodiment of the invention is carried out data screening by the power quality analysis program, excavate, parameter with all underproof monitoring points of the quality of power supply, fault waveform, may cause the current supply circuit of this problem, may be subjected to the current supply circuit of this problems affect, information such as the main wiring diagram that relates to form portion and can preserve, show, the quality of power supply report of printout, provide effective assistant analysis means for investigating out the underproof reason of the quality of power supply rapidly, and safeguard with prediction for the analysis of the quality of power supply fault trend possibility is provided, making electric energy quality monitoring break away from traditional simple data with analysis gathers, statistics, thereby improve the analysis and the management automation level of the quality of power supply effectively, for electric power safety production and stable operation provide useful Technical Reference, produce remarkable economic efficiency and social benefit.
The embodiment of the invention is used data mining technology, from high-volume database, find out the data relevant automatically with quality of power supply transient event, and do not need user oneself to go planless search data to analyze, thereby can improve the user's of power quality analysis system work efficiency greatly, realize intuitively, systematic power quality analysis.
The embodiment of the invention is based on the SOE logout, can help the user qualitative, quantitatively understand between the quality of power supply incident emergence period dependent event and waveform with this monitoring point, front and back and relevant monitoring point, thereby help to search cause, coverage and the dynamic flow of the quality of power supply, can carry out improvement or perfect targetedly at the electrical network weak link, for safeguarding power circuit, reducing the foundation that breakdown loss provides necessity.
Fig. 2 shows the structure of the equipment for monitoring power quality that the embodiment of the invention provides.
Wherein, electric energy quality monitoring data preservation module 21 is used for the electric energy quality monitoring data are saved to database.
Specify monitoring point transient event acquisition module 22 to be used to obtain the transient event of specifying the monitoring point;
Specify monitoring point dependent event acquisition module 23 to be used to obtain the transient event time of origin T of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin;
All monitoring point dependent event acquisition module 24 is used for obtaining all monitoring points of database at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin;
Monitoring report generation module 25 is used for first dependent event and second dependent event obtained are analyzed, and generates the electric energy quality monitoring report.
Preferably, described monitoring report generation module 25 specifically comprises:
Specify monitoring point dependent event analysis module 251, be used for analyzing the reason of the transient event of described appointment monitoring point according to described first dependent event;
All monitoring points dependent event analysis module 252, are used for analyzing according to described second dependent event initial place and the coverage of the transient event of described appointment monitoring point;
Electric energy quality monitoring report generation module 253 is used for according to specifying monitoring point dependent event analysis module 251 and all analysis result generation electric energy quality monitoring reports of monitoring point dependent event analysis module 252.
Preferably, described electric energy quality monitoring is reported as text or statement form.
The embodiment of the invention also provides a kind of electric energy quality monitoring system, and described system comprises above-mentioned equipment for monitoring power quality, in view of this equipment for monitoring power quality in above existing detailed description, repeat no more herein.
The embodiment of the invention by obtain specify the monitoring point transient event at time of origin T
0First dependent event constantly in the Δ T time, and obtain all monitoring points at T
0Second dependent event constantly in the Δ T time, in conjunction with first dependent event and second dependent event transient event of specifying the monitoring point is analyzed, and generation electric energy quality monitoring report, the efficient and the accuracy rate of electric energy quality monitoring have been improved, for electric power safety production and stable operation provide useful Technical Reference, produce remarkable economic efficiency and social benefit.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an electric energy quality monitoring method is characterized in that, said method comprising the steps of:
Obtain the transient event of specifying the monitoring point;
Obtain the time of origin T of the transient event of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin;
Obtain in the database all monitoring points at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin;
First dependent event and second dependent event obtained are analyzed, generated the electric energy quality monitoring report.
2. electric energy quality monitoring method as claimed in claim 1 is characterized in that, described first dependent event and second dependent event obtained is analyzed, and the step that generates the electric energy quality monitoring report specifically comprises:
Analyze the reason of the transient event of described appointment monitoring point according to described first dependent event;
Analyze the initial place and the coverage of the transient event of described appointment monitoring point according to described second dependent event;
Generate the electric energy quality monitoring report according to above-mentioned analysis result.
3. electric energy quality monitoring method as claimed in claim 1 is characterized in that, before the step of obtaining the transient event of specifying the monitoring point, described method also comprises:
The electric energy quality monitoring data are saved to database.
4. electric energy quality monitoring method as claimed in claim 1 is characterized in that described electric energy quality monitoring is reported as text or statement form.
5. an equipment for monitoring power quality is characterized in that, described device comprises:
Specify monitoring point transient event acquisition module, be used to obtain the transient event of specifying the monitoring point;
Specify monitoring point dependent event acquisition module, be used to obtain the time of origin T of the transient event of described appointment monitoring point
0Constantly, be spaced apart first dependent event of default time Δ T with described transient event time of origin;
All monitoring point dependent event acquisition module is used for obtaining all monitoring points of database at described transient event time of origin T
0Constantly, be spaced apart second dependent event of default time Δ T with described transient event time of origin;
Monitoring report generation module is used for first dependent event and second dependent event obtained are analyzed, and generates the electric energy quality monitoring report.
6. equipment for monitoring power quality as claimed in claim 5 is characterized in that, described monitoring report generation module specifically comprises:
Specify monitoring point dependent event analysis module, be used for analyzing the reason of the transient event of described appointment monitoring point according to described first dependent event;
Whole monitoring points dependent event analysis modules is used for analyzing according to described second dependent event initial place and the coverage of the transient event of described appointment monitoring point;
Electric energy quality monitoring report generation module is used for generating the electric energy quality monitoring report according to above-mentioned analysis result.
7. equipment for monitoring power quality as claimed in claim 5 is characterized in that, described device also comprises:
The electric energy quality monitoring data are preserved module, are used for the electric energy quality monitoring data are saved to database.
8. equipment for monitoring power quality as claimed in claim 5 is characterized in that described electric energy quality monitoring is reported as text or statement form.
9. an electric energy quality monitoring system is characterized in that, described system comprises each described equipment for monitoring power quality of claim 5 to 8.
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| CN2009101091859A CN101988941B (en) | 2009-07-30 | 2009-07-30 | Method, device and system for monitoring power quality |
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| CN2009101091859A CN101988941B (en) | 2009-07-30 | 2009-07-30 | Method, device and system for monitoring power quality |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103116096A (en) * | 2013-01-24 | 2013-05-22 | 广东电网公司电力科学研究院 | Integration unit for electric energy quality monitoring and synchronous sampling method of integration unit |
| CN104635069A (en) * | 2013-11-06 | 2015-05-20 | 国家电网公司 | Electric energy monitoring system |
| CN107144726A (en) * | 2017-06-09 | 2017-09-08 | 深圳市中电电力技术股份有限公司 | A kind of A step voltages transient state monitoring device, method and system |
| CN110687367A (en) * | 2018-07-06 | 2020-01-14 | 施耐德电气美国股份有限公司 | System and method for characterizing power quality events in an electrical system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103116096A (en) * | 2013-01-24 | 2013-05-22 | 广东电网公司电力科学研究院 | Integration unit for electric energy quality monitoring and synchronous sampling method of integration unit |
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| CN107144726A (en) * | 2017-06-09 | 2017-09-08 | 深圳市中电电力技术股份有限公司 | A kind of A step voltages transient state monitoring device, method and system |
| CN107144726B (en) * | 2017-06-09 | 2019-11-15 | 深圳市中电电力技术股份有限公司 | A kind of A step voltage transient state monitoring device, method and system |
| CN110687367A (en) * | 2018-07-06 | 2020-01-14 | 施耐德电气美国股份有限公司 | System and method for characterizing power quality events in an electrical system |
| CN110687367B (en) * | 2018-07-06 | 2022-07-19 | 施耐德电气美国股份有限公司 | System and method for characterizing power quality events in an electrical system |
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