CN215340055U - Electric quantity detection filter system - Google Patents
Electric quantity detection filter system Download PDFInfo
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- CN215340055U CN215340055U CN202121011607.1U CN202121011607U CN215340055U CN 215340055 U CN215340055 U CN 215340055U CN 202121011607 U CN202121011607 U CN 202121011607U CN 215340055 U CN215340055 U CN 215340055U
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Abstract
The utility model discloses an electric quantity detection filter system, and belongs to the technical field of power grids. The first signal, namely the analog signal in the power grid, is separated into a fundamental wave signal and a harmonic wave signal through an analog filter, the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; when the harmonic analysis error is increased to be an abnormal signal, the amplitude value of the harmonic signal and the amplitude value of the fundamental wave signal are abnormal, the comparator outputs a signal to the first processor after comparing the abnormal amplitude value with the normal amplitude value, the first processor controls the data switch module to be connected with the second data port, the signal after the separation of the digital filter is output to the second data port and is transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal, and when the harmonic analysis error is increased, the reliability and the accuracy of the harmonic electric energy detection are improved, and the accuracy of the electric quantity detection is improved.
Description
Technical Field
The utility model relates to the technical field of power grids, in particular to an electric quantity detection filter system.
Background
With the development of household appliances, a large number of nonlinear loads are connected into a residential power grid, so that a large number of harmonic distortion interferences are generated in the power grid, and the accuracy of the current electric energy metering is challenged, so that the accurate detection of the harmonic and the metering of the electric energy have important significance for the current electric power industry.
The existing harmonic analysis usually adopts FFT (fast fourier transform) to realize harmonic analysis, but because the actual power grid signal often contains abundant harmonic components, and the amplitude of the harmonic component is generally several percent or less of the fundamental component. When asynchronous sampling is carried out by the method provided by the prior art, the frequency spectrum leakage of the fundamental component can seriously affect the harmonic component, mutual leakage can occur between the harmonic components, so that the harmonic analysis error is increased, and the reliability and accuracy of harmonic electric energy detection are reduced, so that the accuracy of electric energy detection is further reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, embodiments of the present invention provide an electric quantity detection filter system. The technical scheme is as follows:
there is provided a charge detection filter system, the system comprising:
the device comprises an alternating current shunt, an analog filter, a digital-to-analog conversion component, a first processor, a second processor, a data switch module, a first comparator component, a second comparator component, a first data port and a second data port;
the alternating current shunt is respectively connected with the analog filter and the digital-to-analog conversion component;
the digital-to-analog conversion component is connected with the digital filter;
the analog filter is connected with the first comparator component and the second comparator;
the first processor is connected with the data switch module;
the data switch module is connected with the first data port or the second data port;
the second processor is respectively connected with the second data port and the digital filter;
an analog signal in a power grid is divided into a first signal and a second signal which are identical through the alternating current shunt, the first signal is divided into a fundamental wave signal and a harmonic wave signal through the analog filter, the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; the second signal is converted into a data signal through the digital-to-analog conversion component, and is output to the digital filter and separated by the digital filter;
when the first comparator component and the second comparator component indicate normal, the first processor controls the data switch module to be connected with the first data port, and the signal separated by the digital filter is output to the first data port;
when the first comparator component and the second comparator component indicate abnormality, the first processor controls the data switch module to be connected with the second data port, and the signal separated by the digital filter is output to the second data port and transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal.
Alternatively to this, the first and second parts may,
the data switch module is connected with the timer;
when the first comparator component and the second comparator component indicate abnormality, the timer starts timing, and after timing to preset time, the data switch module is controlled to be connected with the first data port.
Alternatively to this, the first and second parts may,
the second processor is respectively connected with the display device and the input device.
Alternatively to this, the first and second parts may,
the first processor is connected with a first network interface;
the second processor is connected with a second network interface;
the first network interface is connected with a first server through a network, and the second network interface is connected with a second server;
the first server is used for judging whether the analog signal in the power grid is abnormal or not, and the second server is used for adjusting the parameter of the digital filter according to the separated signal.
Alternatively to this, the first and second parts may,
the first processor is connected with an alarm device;
when the first comparator component and the second comparator component indicate abnormality, the first processor controls the alarm device to operate.
The technical scheme provided by the embodiment of the utility model has the following beneficial effects:
separating the first signal, namely the analog signal in the power grid into a fundamental wave signal and a harmonic wave signal through an analog filter, wherein the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; when the harmonic analysis error is increased to be an abnormal signal, the amplitude value of the harmonic signal and the amplitude value of the fundamental wave signal are abnormal, the comparator outputs a signal to the first processor after comparing the abnormal amplitude value with the normal amplitude value, the first processor controls the data switch module to be connected with the second data port, the signal after the digital filter is separated is output to the second data port and is transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal, when the harmonic analysis error is increased, the reliability and the accuracy of the harmonic electric energy detection are improved, and the accuracy of the electric quantity detection is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an electrical quantity detection filter system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an electrical quantity detection filter system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an electrical quantity detection filter system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an electrical quantity detection filter system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electrical quantity detection filter system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Referring to fig. 1, there is provided a charge detection filter system, including:
the device comprises an alternating current shunt, an analog filter, a digital-to-analog conversion component, a first processor, a second processor, a data switch module, a first comparator component, a second comparator component, a first data port and a second data port;
the alternating current shunt is respectively connected with the analog filter and the digital-to-analog conversion component;
the digital-to-analog conversion component is connected with the digital filter;
the analog filter is connected with the first comparator component and the second comparator;
the first processor is connected with the data switch module;
the data switch module is connected with the first data port or the second data port;
the second processor is respectively connected with the second data port and the digital filter;
the working principle of the electric quantity detection filter system is as follows:
an analog signal in a power grid passes through an alternating current shunt and is divided into a first signal and a second signal which are identical, the first signal passes through an analog filter, the analog filter separates the first signal into a fundamental wave signal and a harmonic wave signal, the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; the second signal is converted into a data signal through the digital-to-analog conversion component and is output to the digital filter, the data signal is separated by the digital filter and is separated into a digital fundamental wave signal and a digital harmonic wave signal, so that harmonic wave analysis errors are increased, the reliability and accuracy of harmonic wave electric energy detection are reduced, and the accuracy of electric quantity detection is further reduced;
when the first comparator component and the second comparator component indicate normal, the first processor controls the data switch module to be connected with the first data port, and the signal separated by the digital filter is output to the first data port;
when the first comparator component and the second comparator component indicate abnormality, the first processor controls the data switch module to be connected with the second data port, and the signal separated by the digital filter is output to the second data port and transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal.
Separating the first signal, namely the analog signal in the power grid into a fundamental wave signal and a harmonic wave signal through an analog filter, wherein the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; when the harmonic analysis error is increased to be an abnormal signal, the amplitude value of the harmonic signal and the amplitude value of the fundamental wave signal are abnormal, the comparator outputs a signal to the first processor after comparing the abnormal amplitude value with the normal amplitude value, the first processor controls the data switch module to be connected with the second data port, the signal after the digital filter is separated is output to the second data port and is transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal, when the harmonic analysis error is increased, the reliability and the accuracy of the harmonic electric energy detection are improved, and the accuracy of the electric quantity detection is further improved.
Alternatively, as shown with reference to figure 2,
the data switch module is connected with the timer;
when the first comparator component and the second comparator component indicate abnormality, the timer starts timing, and after timing to preset time, the data switch module is controlled to be connected with the first data port.
Alternatively, as shown with reference to figure 3,
the second processor is respectively connected with the display device and the input device.
Alternatively, as shown with reference to figure 4,
the first processor is connected with the first network interface;
the second processor is connected with the second network interface;
the first network interface is connected with a first server through a network, and the second network interface is connected with a second server;
the first server is used for judging whether the analog signals in the power grid are abnormal or not, and the second server is used for adjusting the parameters of the digital filter according to the separated signals.
Alternatively, as shown with reference to figure 5,
the first processor is connected with the alarm device;
when the first comparator component and the second comparator component indicate abnormity, the first processor controls the alarm device to operate.
All the above-mentioned optional technical solutions can be combined arbitrarily to form the optional embodiments of the present invention, and are not described herein again.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A charge detection filter system, the system comprising:
the device comprises an alternating current shunt, an analog filter, a digital-to-analog conversion component, a first processor, a second processor, a data switch module, a first comparator component, a second comparator component, a first data port and a second data port;
the alternating current shunt is respectively connected with the analog filter and the digital-to-analog conversion component;
the digital-to-analog conversion component is connected with the digital filter;
the analog filter is connected with the first comparator component and the second comparator;
the first processor is connected with the data switch module;
the data switch module is connected with the first data port or the second data port;
the second processor is respectively connected with the second data port and the digital filter;
an analog signal in a power grid is divided into a first signal and a second signal which are identical through the alternating current shunt, the first signal is divided into a fundamental wave signal and a harmonic wave signal through the analog filter, the fundamental wave signal passes through a first comparator component, and the harmonic wave signal passes through a second comparator component; the second signal is converted into a data signal through the digital-to-analog conversion component, and is output to the digital filter and separated by the digital filter;
when the first comparator component and the second comparator component indicate normal, the first processor controls the data switch module to be connected with the first data port, and the signal separated by the digital filter is output to the first data port;
when the first comparator component and the second comparator component indicate abnormality, the first processor controls the data switch module to be connected with the second data port, and the signal separated by the digital filter is output to the second data port and transmitted to the second processor, so that the second processor adjusts the parameter of the digital filter according to the separated signal.
2. The system of claim 1,
the data switch module is connected with the timer;
when the first comparator component and the second comparator component indicate abnormality, the timer starts timing, and after timing to preset time, the data switch module is controlled to be connected with the first data port.
3. The system of claim 2,
the second processor is respectively connected with the display device and the input device.
4. The system of claim 3,
the first processor is connected with a first network interface;
the second processor is connected with a second network interface;
the first network interface is connected with a first server through a network, and the second network interface is connected with a second server;
the first server is used for judging whether the analog signal in the power grid is abnormal or not, and the second server is used for adjusting the parameter of the digital filter according to the separated signal.
5. The system of claim 4,
the first processor is connected with an alarm device;
when the first comparator component and the second comparator component indicate abnormality, the first processor controls the alarm device to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121011607.1U CN215340055U (en) | 2021-05-12 | 2021-05-12 | Electric quantity detection filter system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121011607.1U CN215340055U (en) | 2021-05-12 | 2021-05-12 | Electric quantity detection filter system |
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| CN215340055U true CN215340055U (en) | 2021-12-28 |
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| CN202121011607.1U Active CN215340055U (en) | 2021-05-12 | 2021-05-12 | Electric quantity detection filter system |
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