CN105487036A - Error characteristic analysis system of electronic mutual inductor - Google Patents
Error characteristic analysis system of electronic mutual inductor Download PDFInfo
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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 provides an error characteristic analysis system of an electronic mutual inductor. The system comprises a real-time data video monitoring module, a full life analysis module, a stability analysis module and a correlation analysis module connected with a historical database, the full life analysis module is used to analyze conditions of the electronic mutual inductor before and after operation, the stability analysis module is used to calculate the mean value and the variance of the ratio error as well as the mean value and the variance of the angle error of the electronic mutual inductor in the preset time and data interval range; and the correlation analysis module is used to analyze the temperature characteristic, the load characteristic and the time characteristic between the ratio/angle error and temperature, load and time. Compared with the prior art, the system monitors and analyzes the operation conditions of the operated electronic mutual inductor remotely in real time to greatly reduce the maintenance difficulty and cost of the electronic mutual inductor.
Description
Technical Field
The invention relates to the key technical field of intelligent equipment, in particular to an error characteristic analysis system of an electronic transformer.
Background
At present, the electronic transformer is still in a trial application stage, and the stability and the reliability of the electronic transformer in the operation process are still in a certain gap compared with those of the traditional electromagnetic transformer.
At present, a plurality of power companies in power provinces of networks have carried out some researches in the field of online monitoring of the operation state of an electronic transformer, such as a method and a device for comparing the operation errors of an optical current transformer and an electromagnetic current transformer in real time (patent number: 201210429190.X) applied by power companies in Jiangsu provinces, and an online error analysis system (patent number: 201410183998.3) applied by Guizhou power test research institute, wherein the protection range of patents applied in China at present is limited to online acquisition, remote transmission and real-time calibration of the measurement data of the electronic transformer. However, a mature method for reasonably, accurately and quantitatively evaluating the stability and reliability of the electronic transformer is still lacking in China at present.
Therefore, it is desirable to provide an error characteristic analysis system capable of realizing quantitative analysis of errors and influence parameters in an operation process of an electronic transformer.
Disclosure of Invention
In order to meet the requirements of the prior art, the invention provides an electronic transformer error characteristic analysis system.
The technical scheme of the invention is as follows:
the system comprises a real-time data video monitoring module, a full-life analysis module, a stability analysis module and a correlation analysis module which are respectively connected with a historical database;
the real-time data video monitoring module is used for displaying a system topological graph of the transformer substation, a real-time acquisition waveform of the electronic transformer, a current day monitoring waveform and a real-time monitoring picture;
the service life analysis module compares factory test data, type test data and field test data of the electronic transformer and analyzes the operation condition of the electronic transformer;
the stability analysis module is used for calculating the mean value and the variance of the ratio difference value of the electronic transformer in the preset time and data interval range and the mean value and the variance of the angle difference value; the data interval range comprises interval ranges of load, temperature, specific difference and angular difference;
the correlation analysis module is used for analyzing a first temperature characteristic, a first load characteristic and a first time characteristic between the specific difference of the electronic transformer and the temperature, the load and the time respectively, or analyzing a second temperature characteristic, a second load characteristic and a second time characteristic between the angular difference of the electronic transformer and the temperature, the load and the time respectively.
Preferably, the real-time data video monitoring module comprises a substation system topology display unit, an electronic transformer real-time acquisition unit, an electronic transformer current-day monitoring unit and an electronic transformer real-time monitoring unit;
the substation system topology display unit displays the electric circuit of the substation; the electric circuit comprises the models of all electronic transformers, and voltage values and current values acquired in real time;
the real-time acquisition unit of the electronic transformer monitors three-phase voltage waveform, current waveform, primary voltage effective value and primary current effective value acquired by the electronic transformer in real time, and the specific difference and angular difference of the electronic transformer;
the electronic transformer on-day monitoring unit is used for monitoring the temperature and the load in the transformer substation and the specific difference and the angular difference of the electronic transformer, and displaying a temperature curve and a load curve of the transformer substation on the day and a specific difference change curve and an angular difference change curve of the electronic transformer;
the real-time monitoring unit of the electronic transformer displays the real-time state of a primary circuit in the transformer substation and the real-time state of the electronic transformer in real time through videos;
preferably, the factory test data, the type test data and the field test data all include a specific difference curve, an angular difference curve, a primary current curve and a primary voltage curve of the electronic transformer;
preferably, the correlation analysis module includes a data curve acquisition unit and a curve analysis unit;
the data curve acquisition unit is used for obtaining a ratio difference-time curve, a temperature-time curve and a load-time curve according to the ratio difference data, the temperature data, the load data and the time data in the historical database, and obtaining an angle difference-time curve, a temperature-time curve and a load-time curve according to the angle difference data, the temperature data, the load data and the time data;
the curve analysis unit is used for analyzing a first temperature characteristic, a first load characteristic and a first time characteristic respectively according to the specific difference-time curve, the temperature-time curve and the load-time curve, or analyzing a second temperature characteristic, a second load characteristic and a second time characteristic according to the angle difference-time curve, the temperature-time curve and the load-time curve;
preferably, analyzing the first temperature characteristic includes: under the condition of fixed load, taking the temperature parameter in the ratio difference-temperature curve as an abscissa axis and the ratio difference as an ordinate axis, and analyzing the influence of the ratio difference on temperature change;
analyzing the first load characteristic includes: under the condition of fixed temperature, taking the load parameter in the specific difference-load curve as an abscissa axis and the specific difference as an ordinate axis, and analyzing the influence of the specific difference on load change;
analyzing the first time characteristic comprises: under the conditions of fixed temperature and load, taking the time parameter in the ratio difference-time curve as an abscissa axis and the ratio difference as an ordinate axis, and analyzing the influence of time change on the ratio difference;
preferably, analyzing the second temperature characteristic includes: under the condition of fixed load, taking the temperature parameter in the angular difference-temperature curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on temperature change;
analyzing the second load characteristic includes: under the condition of fixed temperature, taking the load parameter in the angular difference-load curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on load change;
analyzing the second temporal characteristic includes: and under the conditions of fixed temperature and load, taking the time parameter in the angular difference-time curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on time change.
Compared with the closest prior art, the excellent effects of the invention are as follows:
1. the error characteristic analysis system of the electronic transformer provided by the invention can reasonably, accurately and quantitatively evaluate the relation between the specific difference/angular difference and the influence quantity of temperature, load and time in the operation process of the electronic transformer;
2. the error characteristic analysis system of the electronic transformer provided by the invention provides data support for reasonably screening the advantages and disadvantages of the metering performance of the electronic transformers of various types and manufacturers;
3. according to the error characteristic analysis system of the electronic transformer, the operation and maintenance difficulty and the cost of the electronic transformer can be greatly reduced by remotely monitoring and analyzing the operation state of the electronic transformer which is put into operation in real time.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1: the invention discloses a structural schematic diagram of an error characteristic analysis system of an electronic transformer;
FIG. 2: the display interface schematic diagram of the real-time data video monitoring module in the embodiment of the invention;
FIG. 3: the display interface schematic diagram of the historical database in the embodiment of the invention;
FIG. 4: the analysis result of the stability analysis module in the embodiment of the invention is shown schematically;
FIG. 5: the embodiment of the invention is schematically shown in a ratio difference-time curve and a temperature-time curve;
FIG. 6: the embodiment of the invention is a schematic diagram of a specific difference-time curve and a load-time curve;
FIG. 7: the angle difference-time curve and the temperature-time curve in the embodiment of the invention are schematic diagrams;
FIG. 8: the angle difference-time curve and the load-time curve in the embodiment of the invention are schematic diagrams;
FIG. 9: the first temperature characteristic analysis result in the embodiment of the invention is shown schematically;
FIG. 10: the first load characteristic analysis result in the embodiment of the invention is shown schematically;
FIG. 11: the first time characteristic analysis result in the embodiment of the invention is shown schematically;
FIG. 12; an analysis result schematic diagram of a second temperature characteristic in the embodiment of the invention;
FIG. 13: the analysis result of the second load characteristic in the embodiment of the invention is shown schematically;
FIG. 14: the analysis result of the second time characteristic in the embodiment of the invention is shown schematically.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The embodiment of the error characteristic analysis system of the electronic transformer provided by the invention is shown in fig. 1, and specifically comprises the following steps:
the electronic transformer error characteristic analysis system in the embodiment comprises a real-time data video monitoring module, a full-life analysis module, a stability analysis module and a correlation analysis module which are respectively connected with a historical database. Wherein,
the method comprises the following steps: and the real-time data video monitoring module is used for displaying a system topological graph of the transformer substation, a real-time acquisition waveform of the electronic transformer, a current day monitoring waveform and a real-time monitoring picture.
Secondly, the step of: and the service life analysis module is used for comparing factory test data, type test data and field test data of the electronic transformer and analyzing the operation condition of the electronic transformer.
③: the stability analysis module is used for calculating the mean value and the variance of the ratio difference value of the electronic transformer in the preset time and data interval range and the mean value and the variance of the angle difference value; the data interval range includes interval ranges of load, temperature, ratio difference and angle difference.
Fourthly, the method comprises the following steps: and the correlation analysis module is used for analyzing a first temperature characteristic, a first load characteristic and a first time characteristic between the specific difference of the electronic transformer and the temperature, the load and the time respectively, and analyzing a second temperature characteristic, a second load characteristic and a second time characteristic between the angular difference of the electronic transformer and the temperature, the load and the time respectively.
Real-time data video monitoring module
The real-time data video monitoring module in the embodiment comprises a substation system topology display unit, an electronic transformer real-time acquisition unit, an electronic transformer current day monitoring unit and an electronic transformer real-time monitoring unit. Wherein,
1. topological display unit of transformer substation system
The unit is used for displaying the electrical lines of the substation.
The electric circuit comprises the models of all electronic transformers, and voltage values and current values acquired in real time.
2. Real-time acquisition unit of electronic transformer
The unit is used for monitoring three-phase voltage waveform, current waveform, primary voltage effective value and primary current effective value which are collected by the electronic transformer in real time, and the specific difference and the angular difference of the electronic transformer.
3. Day monitoring unit of electronic transformer
The unit is used for monitoring the temperature and the load in the transformer substation and the specific difference and the angular difference of the electronic transformer, and displaying a temperature curve and a load curve of the transformer substation on the current day and a specific difference change curve and an angular difference change curve of the electronic transformer.
4. Real-time monitoring unit of electronic mutual inductor
The unit displays the real-time state of a primary circuit in the transformer substation and the real-time state of the electronic transformer in real time through videos.
The display interface of the real-time data video monitoring module in the embodiment is shown in fig. 2, a topological diagram of a substation system at the upper left corner of the diagram shows an electric circuit of a substation, a display interface at the upper right corner of the diagram displays real-time three-phase voltage and current of an electronic transformer by adopting a rolling picture, a primary voltage effective value, a primary current effective value, a ratio difference and an angle difference by adopting a table, a temperature curve, a load curve, a ratio difference change curve and an angle difference change curve of the substation on the day of monitoring, and a real-time state of the primary circuit and a real-time state of the electronic transformer at the lower right corner of the diagram.
Second, the whole life analysis module
Factory test data, type test data and field test data in the embodiment all comprise a specific difference curve, an angular difference curve, a primary current curve and a sequential voltage curve of the electronic transformer.
Third, correlation analysis module
The correlation analysis module in this embodiment includes a data curve acquisition unit and a curve analysis unit. Wherein,
1. data curve acquisition unit
The unit obtains a ratio difference-time curve, a temperature-time curve and a load-time curve according to the ratio difference data, the temperature data, the load data and the time data, and obtains an angle difference-time curve, a temperature-time curve and a load-time curve according to the angle difference data, the temperature data, the load data and the time data.
2. Curve analysis unit
The unit analyzes the first temperature characteristic, the first load characteristic and the first time characteristic according to the specific difference-time curve, the temperature-time curve and the load-time curve, or analyzes the second temperature characteristic, the second load characteristic and the second time characteristic according to the angular difference-time curve, the temperature-time curve and the load-time curve. The curve analysis unit in this embodiment can perform analysis in time intervals of 30 days, 90 days, and 180 days, and the analysis results are shown in fig. 5 to 8.
(1) Analyzing a first temperature characteristic, a first load characteristic and a first time characteristic
Analyzing the first temperature characteristic includes: under the condition of fixed load, the temperature parameter in the specific difference-temperature curve is taken as an abscissa axis, the specific difference is taken as an ordinate axis, and the influence of temperature change on the specific difference is analyzed. The analysis result of the first temperature characteristic in this embodiment is shown in fig. 9.
Analyzing the first load characteristic includes: under the condition of fixed temperature, the load parameter in the specific difference-load curve is taken as an abscissa axis, the specific difference is taken as an ordinate axis, and the influence of the specific difference on the load change is analyzed. The analysis result of the first load characteristic in the present embodiment is shown in fig. 10.
Analyzing the first time characteristic includes: under the condition of fixed temperature and load, the time parameter in the specific difference-time curve is taken as an abscissa axis, the specific difference is taken as an ordinate axis, and the influence of time change on the specific difference is analyzed. The analysis result of the first time characteristic in this embodiment is shown in fig. 11.
(2) Analyzing the second temperature characteristic, the second load characteristic and the second time characteristic
Analyzing the second temperature characteristic includes: under the condition of fixed load, the temperature parameter in the angular difference-temperature curve is taken as an abscissa axis, the angular difference is taken as an ordinate axis, and the influence of the angular difference on the temperature change is analyzed. The analysis result of the second temperature characteristic in this example is shown in fig. 12.
Analyzing the second load characteristic includes: under the condition of fixed temperature, the load parameters in the angular difference-load curve are taken as an abscissa axis and the angular difference is taken as an ordinate axis, and the influence of the angular difference on load change is analyzed. The analysis result of the second load characteristic in this embodiment is shown in fig. 13.
Analyzing the second temporal characteristic includes: under the condition of fixed temperature and load, the time parameter in the angular difference-time curve is taken as an abscissa axis, the angular difference is taken as an ordinate axis, and the influence of the angular difference on the time change is analyzed. The analysis result of the second time characteristic in this embodiment is shown in fig. 14.
Fourth, stability analysis module
The analysis result of the stability analysis module in this embodiment is shown in fig. 4, where the abscissa is the date, the ordinate is the ratio difference data or the angular difference data, the dots represent the average value of the current ratio difference or angular difference in the preset load interval and temperature interval, the length of the upper and lower straight lines of each dot represents the fluctuation of the day error, and the length of the line is the variance of the ratio difference or the variance of the angular difference in the load interval and temperature interval.
Fifth, historical database
In the embodiment, the historical database stores the temperature, load, specific difference and angular difference of the electronic transformer in the substation along with the change of time in one day. The user can flexibly review the historical data according to the requirement. The display interface of the history database in this embodiment is shown in fig. 3, where the upper left corner is a graph of temperature variation with time, the lower left corner is a graph of ratio difference variation with time, the upper right corner is a graph of load variation with time, and the lower right corner is a graph of angle difference variation with time.
Finally, it should be noted that: the described embodiments are only some embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (6)
1. An electronic transformer error characteristic analysis system is characterized by comprising a real-time data video monitoring module, a full-life analysis module, a stability analysis module and a correlation analysis module which are respectively connected with a historical database;
the real-time data video monitoring module is used for displaying a system topological graph of the transformer substation, a real-time acquisition waveform of the electronic transformer, a current day monitoring waveform and a real-time monitoring picture;
the service life analysis module compares factory test data, type test data and field test data of the electronic transformer and analyzes the operation condition of the electronic transformer;
the stability analysis module is used for calculating the mean value and the variance of the ratio difference value of the electronic transformer in the preset time and data interval range and the mean value and the variance of the angle difference value; the data interval range comprises interval ranges of load, temperature, specific difference and angular difference;
the correlation analysis module is used for analyzing a first temperature characteristic, a first load characteristic and a first time characteristic between the specific difference of the electronic transformer and the temperature, the load and the time respectively, or analyzing a second temperature characteristic, a second load characteristic and a second time characteristic between the angular difference of the electronic transformer and the temperature, the load and the time respectively.
2. The system for analyzing the error characteristics of the electronic transformer according to claim 1, wherein the real-time data video monitoring module comprises a substation system topology display unit, an electronic transformer real-time acquisition unit, an electronic transformer current-day monitoring unit and an electronic transformer real-time monitoring unit;
the substation system topology display unit displays the electric circuit of the substation; the electric circuit comprises the models of all electronic transformers, and voltage values and current values acquired in real time;
the real-time acquisition unit of the electronic transformer monitors three-phase voltage waveform, current waveform, primary voltage effective value and primary current effective value acquired by the electronic transformer in real time, and the specific difference and angular difference of the electronic transformer;
the electronic transformer on-day monitoring unit is used for monitoring the temperature and the load in the transformer substation and the specific difference and the angular difference of the electronic transformer, and displaying a temperature curve and a load curve of the transformer substation on the day and a specific difference change curve and an angular difference change curve of the electronic transformer;
the real-time monitoring unit of the electronic transformer displays the real-time state of a primary circuit in the transformer substation and the real-time state of the electronic transformer in real time through videos.
3. The system for analyzing error characteristics of an electronic transformer according to claim 1, wherein the factory test data, the model test data and the field test data each include a specific difference curve, an angular difference curve, a primary current curve and a primary voltage curve of the electronic transformer.
4. The system for analyzing error characteristics of an electronic transformer according to claim 1, wherein the correlation analysis module comprises a data curve acquisition unit and a curve analysis unit;
the data curve acquisition unit is used for obtaining a ratio difference-time curve, a temperature-time curve and a load-time curve according to the ratio difference data, the temperature data, the load data and the time data in the historical database, and obtaining an angle difference-time curve, a temperature-time curve and a load-time curve according to the angle difference data, the temperature data, the load data and the time data;
the curve analysis unit analyzes a first temperature characteristic, a first load characteristic and a first time characteristic respectively according to the specific difference-time curve, the temperature-time curve and the load-time curve, or analyzes a second temperature characteristic, a second load characteristic and a second time characteristic according to the angle difference-time curve, the temperature-time curve and the load-time curve.
5. The system of claim 4, wherein analyzing the first temperature characteristic comprises: under the condition of fixed load, taking the temperature parameter in the ratio difference-temperature curve as an abscissa axis and the ratio difference as an ordinate axis, and analyzing the influence of the ratio difference on temperature change;
analyzing the first load characteristic includes: under the condition of fixed temperature, taking the load parameter in the specific difference-load curve as an abscissa axis and the specific difference as an ordinate axis, and analyzing the influence of the specific difference on load change;
analyzing the first time characteristic comprises: and under the conditions of fixed temperature and load, analyzing the influence of time change on the ratio difference by taking the time parameter in the ratio difference-time curve as an abscissa axis and the ratio difference as an ordinate axis.
6. The system of claim 4, wherein analyzing the second temperature characteristic comprises: under the condition of fixed load, taking the temperature parameter in the angular difference-temperature curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on temperature change;
analyzing the second load characteristic includes: under the condition of fixed temperature, taking the load parameter in the angular difference-load curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on load change;
analyzing the second temporal characteristic includes: and under the conditions of fixed temperature and load, taking the time parameter in the angular difference-time curve as an abscissa axis and the angular difference as an ordinate axis, and analyzing the influence of the angular difference on time change.
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