CN102467567A - Data acquiring and computing system for power quality - Google Patents
Data acquiring and computing system for power quality Download PDFInfo
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- CN102467567A CN102467567A CN2010105534204A CN201010553420A CN102467567A CN 102467567 A CN102467567 A CN 102467567A CN 2010105534204 A CN2010105534204 A CN 2010105534204A CN 201010553420 A CN201010553420 A CN 201010553420A CN 102467567 A CN102467567 A CN 102467567A
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Abstract
The invention discloses a data acquiring and computing system for power quality, which is used for receiving data of a database based on PQ View and outputting signals to an SQL (Structured Query Language) Server database. The system comprises a data reading and filtering unit, a harmonic computing unit, a sag computing unit, a steady-state index computing unit and a comprehensive evaluation computing unit, wherein the data reading and filtering unit is used for acquiring the data in the database based on the PQ View, respectively outputting basic information to the SQL Server database, outputting harmonic computing source data needed by the harmonic computing unit to the harmonic computing unit, outputting event information to the sag computing unit and outputting steady-state information to the steady-state index computing unit. According to the invention, the conventional database based on the PQ View is better utilized to ensure that scientific basis for decision making on managing the power quality is provided for power companies, therefore, the safety and the reliability of power grids can be increased.
Description
Technical field
The present invention relates to quality of power supply field, relate in particular to a kind of data acquisition and computing system that is used for the quality of power supply.
Background technology
Along with the application of exact instrument and complex electronic equipment, the user more and more requires the supply of electrical energy of high-quality and high reliability.In recent years, along with the introduction of external sophisticated equipment and the development of application and electron trade, by power quality problem cause increasing unusually.
The quality of power supply (Power Quality) is said from universal significance to be meant quality supply, comprises quality of voltage, electric current quality, power supply quality and uses electricity quality.It can be defined as: cause the deviation of voltage, electric current or the frequency of consumer fault or cisco unity malfunction, its content comprises frequency departure, voltage deviation, voltage fluctuation and flicker, three-phase imbalance, temporary transient or transient overvoltage, wave form distortion (harmonic wave), voltage dip, interruption, rises and power supply continuity etc. temporarily.
In recent years along with rapid development of economy; Electric load increases swift and violent; Increasingly sophisticatedization of power load and variation, increasing non-linear, impact, the application apparatus that uneven harmonic is abundant insert electrical network in succession, all can have influence on the quality of power supply of power supply grid to some extent.Monitoring means imperfection and operation, extraneous interference and various failure and other reasons in addition, power quality problem becomes increasingly conspicuous.
At present; The database that all is based on PQView that a lot of Utilities Electric Co.s electric energy quality monitoring system adopts; PQView is the power quality analysis software of U.S.'s DianKeYuan development; The many electric energy quality monitoring data of storage in this database how to from this database, collecting the differentiation that reason falls in data temporarily, are that the present inventor is devoted to the problem studying and solve.
Summary of the invention
The objective of the invention is to overcome the defective of prior art and a kind of data acquisition and computing system that is used for the quality of power supply is provided, it can improve the security and the reliability of electrical network.
The technical scheme that realizes above-mentioned purpose is: a kind of data acquisition and computing system that is used for the quality of power supply; This data acquisition and computing system receive the data of database based on PQView; And output signal to a SQLServer database; Wherein, described data acquisition and computing system comprise that data read and filter element, Harmonics Calculation unit, fall computing unit, stable state index computing unit and comprehensive assessment computing unit temporarily, wherein:
Described data read and filter element is gathered said based on the data in the database of PQView; And export Back ground Information respectively and give described SQL Server database (relational database management system); The needed Harmonics Calculation source data of output harmonic wave computing unit is given said Harmonics Calculation unit; Outgoing event information is given the described computing unit that falls temporarily, and output stable state information is given described stable state index computing unit;
Described Harmonics Calculation unit carries out Harmonics Calculation to the data that receive, and the output harmonic wave basic data is given described SQL Server database;
The described computing unit that falls temporarily falls the calculating of eigenwert temporarily to the data that receive, and exports this and falls eigenwert temporarily and give described SQL Server database;
Described stable state index computing unit carries out the calculating of stable state index to the data that receive, and the stable state achievement data after will calculating is exported to described SQL Server database;
Described comprehensive assessment computing unit receives the data of said stable state index computing unit output, and basic data is calculated, and then the result is exported to described SQL Server database.
Above-mentioned data acquisition that is used for the quality of power supply and computing system; Wherein, described data read with the filter element collection is said and comprise system information, channel information, station data source information, event information and stable state information based on the data in the database of PQView.
Above-mentioned data acquisition that is used for the quality of power supply and computing system; Wherein, Described Harmonics Calculation unit separates harmonic wave based on the voltage and the current data of continuous a plurality of cycles; Calculate an amplitude and an angle of each harmonic component, finally calculate voltage content, background harmonics and user's harmonic wave of each harmonic.
Above-mentioned data acquisition that is used for the quality of power supply and computing system, wherein, the described computing unit calculating single that falls temporarily falls eigenwert temporarily and when same monitoring point takes place to fall incident temporarily in succession, carries out composition of matter.
Above-mentioned data acquisition that is used for the quality of power supply and computing system; Wherein, the stable state index calculated of described stable state index computing unit comprise the monitoring point voltage deviation of every day, frequency departure, Voltage unbalance degree, harmonic voltage, the stable state index in the maximum of flickering when long, flickering in short-term, minimum, average, 95% and 99% probable value, electric pressure and zone.
Above-mentioned data acquisition that is used for the quality of power supply and computing system, wherein, described comprehensive assessment computing unit comprises calculating monitoring point evaluation index, calculating voltage level evaluation index and calculates regional evaluation index the calculating of basic data.
The invention has the beneficial effects as follows: data acquisition of the present invention and computing system periodically will forward in the SQL Server database based on the data in the database of PQView; Good use existing database based on PQVi ew; Never ipsilateral is understood the quality condition of voltage and current quality and entire system operation, harm, influence degree and the coverage that possibly cause the quality of power supply make judgement to regional power grid in the present invention, for Utilities Electric Co. provides the scientific decision foundation to the improvement of the quality of power supply.
Description of drawings
Fig. 1 is a kind of data acquisition of the quality of power supply and structural representation of computing system of being used for of the present invention.
Embodiment
To combine accompanying drawing that the present invention is described further below.
See also Fig. 1, a kind of data acquisition and computing system 2 that is used for the quality of power supply of the present invention has been shown among the figure, the data that this data acquisition and computing system 2 receive based on the database 1 of PQView, and output signal to a SQL Server database 3.
Data acquisition and computing system 2 comprise that data read and filter element 21, Harmonics Calculation unit 22, fall computing unit 23, stable state index computing unit 24 and comprehensive assessment computing unit 25 temporarily, wherein:
Data read and filter element 21 is gathered based on the data in the database 1 of PQView; And export Back ground Information respectively and give SQL Server database 3; Output harmonic wave computing unit 22 needed Harmonics Calculation source datas are given Harmonics Calculation unit 22; Outgoing event information is given and is fallen computing unit 23 temporarily; And export stable state information and give stable state index computing unit 24, data read with filter element collection 21 collections and comprise system information, channel information, station data source information, event information and stable state information based on the data in the database 1 of PQView, and these information read through forms such as forms;
The 22 pairs of data that receive in Harmonics Calculation unit are carried out Harmonics Calculation; And the output harmonic wave basic data is given SQL Server database 3; Harmonics Calculation unit 22 separates harmonic wave based on the voltage and the current data of continuous a plurality of cycles; Calculate an amplitude and an angle of each harmonic component, finally calculate voltage content, background harmonics and user's harmonic wave of each harmonic;
Generally get the long 60s (can be self-defined among the PQView) of being of assembly time; Be after
that incident falls in the 1min each temporarily is combined into an array
; Preceding for another example method; Calculate temporary range of decrease value and duration, the incident zero-time is for first falls the time of record temporarily in this combination.For the duration after the different event combination, be the duration of the correspondence of temporary range of decrease value minimum in the incident; If run into the situation that temporary range of decrease value equates, then get the duration of the duration of Time To Event incident early as this combination event.
24 pairs of data that receive of stable state index computing unit are carried out the calculating of stable state index; And the stable state achievement data after will calculating is exported to SQL Server database 3, and the stable state index that stable state index computing unit 24 is calculated comprises the monitoring point voltage deviation of every day, frequency departure, Voltage unbalance degree, harmonic voltage, the stable state index in the maximum of flickering when long, flickering in short-term, minimum, average, 95% and 99% probable value, electric pressure and zone;
Comprehensive assessment computing unit 25 receives the data of stable state index computing unit 24 outputs; Basic data is calculated; Then the result is exported to SQL Server database 3, the calculating of 25 pairs of basic datas of comprehensive assessment computing unit comprises calculates monitoring point evaluation index, calculating voltage level evaluation index and calculates regional evaluation index.The comprehensive assessment index is based on the basic data of comprehensive assessment; Its basic data is the monitoring point data value of every day, wherein data=when long (voltage overgauge, voltage overgauge, frequency overgauge, frequency minus deviation, three Voltage unbalance degree, harmonic voltage resultant distortion rate, flickering).
More than combine accompanying drawing embodiment that the present invention is specified, those skilled in the art can make the many variations example to the present invention according to above-mentioned explanation.Thereby some details among the embodiment should not constitute qualification of the present invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (6)
1. a data acquisition and computing system that is used for the quality of power supply; This data acquisition and computing system receive the data of database based on PQView; And output signal to a SQL Server database; It is characterized in that described data acquisition and computing system comprise that data read and filter element, Harmonics Calculation unit, fall computing unit, stable state index computing unit and comprehensive assessment computing unit temporarily, wherein:
Described data read and filter element is gathered said based on the data in the database of PQView; And export Back ground Information respectively and give described SQL Server database; The needed Harmonics Calculation source data of output harmonic wave computing unit is given said Harmonics Calculation unit; Outgoing event information is given the described computing unit that falls temporarily, and output stable state information is given described stable state index computing unit;
Described Harmonics Calculation unit carries out Harmonics Calculation to the data that receive, and the output harmonic wave basic data is given described SQL Server database;
The described computing unit that falls temporarily falls the calculating of eigenwert temporarily to the data that receive, and exports this and falls eigenwert temporarily and give described SQL Server database;
Described stable state index computing unit carries out the calculating of stable state index to the data that receive, and the stable state achievement data after will calculating is exported to described SQL Server database;
Described comprehensive assessment computing unit receives the data of said stable state index computing unit output, and basic data is calculated, and then the result is exported to described SQL Server database.
2. data acquisition and the computing system that is used for the quality of power supply according to claim 1; It is characterized in that described data read with the filter element collection is said and comprise system information, channel information, station data source information, event information and stable state information based on the data in the database of PQView.
3. data acquisition and the computing system that is used for the quality of power supply according to claim 1; It is characterized in that; Described Harmonics Calculation unit separates harmonic wave based on the voltage and the current data of continuous a plurality of cycles; Calculate an amplitude and an angle of each harmonic component, finally calculate voltage content, background harmonics and user's harmonic wave of each harmonic.
4. data acquisition and the computing system that is used for the quality of power supply according to claim 1 is characterized in that, the described computing unit calculating single that falls temporarily falls eigenwert temporarily and when same monitoring point takes place to fall incident temporarily in succession, carries out composition of matter.
5. data acquisition and the computing system that is used for the quality of power supply according to claim 1; It is characterized in that the stable state index that described stable state index computing unit is calculated comprises the monitoring point voltage deviation of every day, frequency departure, Voltage unbalance degree, harmonic voltage, the stable state index in the maximum of flickering when long, flickering in short-term, minimum, average, 95% and 99% probable value, electric pressure and zone.
6. data acquisition and the computing system that is used for the quality of power supply according to claim 1; It is characterized in that described comprehensive assessment computing unit comprises calculating monitoring point evaluation index, calculating voltage level evaluation index and calculates regional evaluation index the calculating of basic data.
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| CN2010105534204A CN102467567A (en) | 2010-11-19 | 2010-11-19 | Data acquiring and computing system for power quality |
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| CN2010105534204A CN102467567A (en) | 2010-11-19 | 2010-11-19 | Data acquiring and computing system for power quality |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938130A (en) * | 2012-11-09 | 2013-02-20 | 内蒙古东部电力有限公司电力科学研究院 | Comprehensive assessment method for performance indexes of power quality based on PQView |
| CN103065265A (en) * | 2012-12-14 | 2013-04-24 | 山东电力集团公司电力科学研究院 | Identification method based on PQ View data source for power quality disruption type |
| CN103413252A (en) * | 2013-08-22 | 2013-11-27 | 华北电力大学 | Voltage sag real-time analysis system based on multiple agents and analysis method thereof |
| CN106226653A (en) * | 2016-08-11 | 2016-12-14 | 国网浙江省电力公司宁波供电公司 | The transfer law assessment system of the voltage dip of multistage power grid and appraisal procedure |
| CN106370913A (en) * | 2016-09-18 | 2017-02-01 | 浙江群力电气有限公司 | Node voltage dip severity evaluation system and evaluation method |
| CN108051664A (en) * | 2017-11-15 | 2018-05-18 | 全球能源互联网研究院有限公司 | A kind of equipment for monitoring power quality |
-
2010
- 2010-11-19 CN CN2010105534204A patent/CN102467567A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| E.W.GUNTHER: "On Creating a New Format for Power Quality and Quantity Data Interchange", 《IEEE》 * |
| 孙晶: "异构电力信息系统中异构数据库间的数据导换方法", 《电力系统自动化》 * |
| 李树军: "《基于PQDIF的电能质量监测系统的设计》", 《大功率变流技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938130A (en) * | 2012-11-09 | 2013-02-20 | 内蒙古东部电力有限公司电力科学研究院 | Comprehensive assessment method for performance indexes of power quality based on PQView |
| CN103065265A (en) * | 2012-12-14 | 2013-04-24 | 山东电力集团公司电力科学研究院 | Identification method based on PQ View data source for power quality disruption type |
| CN103065265B (en) * | 2012-12-14 | 2017-02-08 | 山东电力集团公司电力科学研究院 | Identification method based on PQ View data source for power quality disruption type |
| CN103413252A (en) * | 2013-08-22 | 2013-11-27 | 华北电力大学 | Voltage sag real-time analysis system based on multiple agents and analysis method thereof |
| CN106226653A (en) * | 2016-08-11 | 2016-12-14 | 国网浙江省电力公司宁波供电公司 | The transfer law assessment system of the voltage dip of multistage power grid and appraisal procedure |
| CN106370913A (en) * | 2016-09-18 | 2017-02-01 | 浙江群力电气有限公司 | Node voltage dip severity evaluation system and evaluation method |
| CN108051664A (en) * | 2017-11-15 | 2018-05-18 | 全球能源互联网研究院有限公司 | A kind of equipment for monitoring power quality |
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Owner name: SHANGHAI ELECTRIC POWER COMMUNICATION CO., LTD. Free format text: FORMER OWNER: SHANGHAI JIULONG ELECTRIC SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20120625 |
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Effective date of registration: 20120625 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant after: Shanghai Electric Power Corporation Co-applicant after: Shanghai Electric Power Communication Co., Ltd. Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant before: Shanghai Electric Power Corporation Co-applicant before: Shanghai Jiulong Electric Power Co., Ltd. |
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Effective date of registration: 20120911 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant after: Shanghai Electric Power Corporation Applicant after: Shanghai Electric Power Communication Co., Ltd. Applicant after: State Grid Corporation of China Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant before: Shanghai Electric Power Corporation Applicant before: Shanghai Electric Power Communication Co., Ltd. |
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Application publication date: 20120523 |