CN116106623B - Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current - Google Patents
Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention belongs to the technical field of electronic circuits, and discloses a double-power calculation single-phase electric energy meter and a method for non-isolated sampling alternating current, wherein the method comprises the following steps: s1, based on alternating current characteristics, a live wire current sampling circuit collects live wire current of alternating current by taking a live wire as a reference ground, and a zero wire current sampling circuit collects zero wire current of the alternating current by taking the live wire as the reference ground; based on the alternating current characteristics, the dynamic voltage sampling circuit circularly collects the zero line voltage of the alternating current through the first sampling loop and the live line voltage of the alternating current through the second sampling loop; s2, the first data processing module calculates and obtains a first path of power of the alternating current based on the zero line current and the zero line voltage of the received alternating current; the second data processing module calculates a second path of power of the alternating current based on the received live wire current and live wire voltage of the alternating current. Based on the alternating current characteristic of alternating current, the circuit needing to be measured in an isolated mode is converted into non-isolated measurement by adopting a mode that a live wire and a zero wire are mutually converted into reference ground.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, and particularly relates to a double-power calculation single-phase electric energy meter and a method for non-isolated sampling alternating current.
Background
With the continuous increase of the electric load of the society, the number of customers of the newly-increased distribution transformer is increased, the business of meter installation and power connection of the electric industry department is increased, the electric energy metering device is a steelyard of the electric industry department, the correctness and the accuracy of the electric energy metering device are directly related to the economic benefits of both power supply and power consumption parties, and the electric energy metering center is taken as a management and execution unit of the electric energy metering device and is very important for carrying out field detection on users in daily work. Therefore, many researches on the correctness and the accuracy of the electric energy meter exist at present, but few researches on the design cost of the electric energy meter exist.
The current common way for ac current detection is resistor, hall element (LEM) and current transformer sampling, i.e. isolation sampling is used. For example, the chinese invention with application number CN202010897238.4 proposes a high-precision ac current testing device and method, comprising: the I/V conversion circuit comprises a two-stage mutual inductor, a sampling circuit, a low-noise small-signal amplifier and a high-precision follower which are sequentially connected; the two-stage transformer converts the detected current into small current; the sampling circuit is used for converting the small current into voltage which can be measured by the analog-to-digital conversion circuit through sampling processing of different measuring ranges; the voltage is transmitted to an analog-digital conversion circuit for data acquisition after passing through a low-noise small-signal amplifier and a high-precision follower. According to the scheme, a two-stage mutual inductor measuring mode is adopted for current measurement in the verification process of the electric energy meter, and a special process temperature control circuit is used for guaranteeing a high-precision voltage reference, so that the current ratio difference and the angle difference measuring precision reach higher levels. However, because the isolation sampling is adopted, that is, the mutual inductor is used, and the application cost of the mutual inductor is higher, the production cost of the ammeter is greatly improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a double-power calculation single-phase electric energy meter and a method for non-isolated sampling alternating current, which convert a circuit needing isolated measurement into non-isolated measurement by adopting a mode that a live wire and a zero wire are mutually converted into reference ground; and the variable live wire and zero line are adopted, and a sampling circuit is used for dynamically sampling the variable alternating voltage, so that the accurate value of the voltage can be measured respectively. And the alternating current characteristic of the commercial power is utilized to separate two groups of independent power supplies in different power supply states for the first data processing module and the second data processing module respectively, and the isolation device is not required to be adopted for segmentation processing. The production cost of the electric energy meter is reduced.
The invention adopts the following technical scheme:
a double-power calculation single-phase electric energy meter for non-isolated sampling alternating current comprises a first data processing module, a second data processing module, a live wire current sampling circuit, a zero line current sampling circuit and a dynamic voltage sampling circuit; the first data processing module is respectively connected with the zero line current sampling circuit and the dynamic voltage sampling circuit; the second data processing module is respectively connected with the live wire current sampling circuit and the dynamic voltage sampling circuit;
the live wire current sampling circuit takes a zero line as a reference ground to collect live wire current of alternating current; the zero line current sampling circuit takes a live wire as a reference ground to collect zero line current of alternating current; the dynamic voltage sampling circuit is provided with a first sampling loop taking a live wire as reference ground and a second sampling loop taking a zero wire as reference ground, and the dynamic voltage sampling circuit is used for collecting the zero wire voltage of the alternating current through the first sampling loop and the live wire voltage of the alternating current through the second sampling loop based on alternating current characteristics;
the first data processing module calculates and obtains a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current; the second data processing module calculates a second path of power of the alternating current based on the live wire current and the live wire voltage of the alternating current.
As a preferred scheme, the first data processing module comprises a data processing unit and a display unit which are connected, and the data processing unit is also connected with the second data processing module;
the data processing unit is used for calculating to obtain a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current, and calculating to obtain the total power of the alternating current based on the first path of power of the alternating current and the second path of power of the alternating current;
and the display unit is used for displaying the total power of the alternating current.
As a preferred scheme, the live wire current sampling circuit comprises a first current acquisition end, a first resistor, a first capacitor, a second resistor and a second current acquisition end which are sequentially connected in series, and further comprises a third capacitor which is connected with the first capacitor and the second capacitor in parallel, wherein a zero line is used as the ground at the connection position between the first capacitor and the second capacitor, and both ends of the third capacitor are connected with the second data processing module.
The zero line current sampling circuit comprises a third current acquisition end, a third resistor, a fourth capacitor, a fifth capacitor, a fourth resistor and a fourth current acquisition end which are sequentially connected in series, wherein the connection part between the fourth capacitor and the fifth capacitor takes a live wire as the reference ground, the connection part between the third resistor and the fourth capacitor is connected with the first data processing module, and the connection part between the fifth capacitor and the fourth resistor is connected with the first data processing module.
Preferably, the circuits in the first data processing module are all referenced to the live line and the circuits in the second data processing module are all referenced to the neutral line.
As a preferable scheme, the dynamic voltage sampling circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a thirteenth resistor which are sequentially connected in series;
the fifth resistor and the sixth resistor which are connected in series are connected in parallel with the seventh capacitor and the eighth capacitor which are connected in series; the connection part between the fifth resistor and the sixth resistor and the connection part between the seventh capacitor and the eighth capacitor are all grounded by taking a live wire as a reference; the connection part of the fifth resistor and the seventh capacitor is connected with the first data processing module;
the thirteenth resistor is connected with the sixth capacitor in parallel, the connection part of the thirteenth resistor and the sixth capacitor takes the zero line as the reference ground, and the connection part of the thirteenth resistor and the other end of the sixth capacitor is connected with the second data processing module.
As an optimal scheme, the dynamic voltage sampling circuit, the live wire current sampling circuit and the zero line current sampling circuit are all sampled by manganese copper.
Correspondingly, the invention also provides a double-power calculation method of the non-isolated sampling alternating current, which is based on the double-power calculation single-phase electric energy meter of the non-isolated sampling alternating current, and comprises the following steps:
s1, based on alternating current characteristics, a live wire current sampling circuit collects live wire current of alternating current by taking a live wire as a reference ground, and a zero wire current sampling circuit collects zero wire current of the alternating current by taking the live wire as the reference ground; based on the alternating current characteristics, the dynamic voltage sampling circuit circularly collects the zero line voltage of the alternating current through the first sampling loop and the live line voltage of the alternating current through the second sampling loop;
s2, the first data processing module calculates and obtains a first path of power of the alternating current based on the received zero line current and zero line voltage of the alternating current; the second data processing module calculates a second path of power of the alternating current based on the received live wire current and live wire voltage of the alternating current.
In step S2, the first data processing module calculates the total power of the ac power based on the first power and the second power of the received ac power.
Preferably, in step S1:
the first sampling loop collects zero line voltage of alternating current and inputs voltage division of corresponding resistors in the first sampling loop into the first data processing module;
the second sampling loop collects the live wire voltage of the alternating current and inputs the voltage division of the corresponding resistor in the second sampling loop into the second data processing module;
in step S2:
the first data processing module calculates and obtains a first path of power of the alternating current based on the received zero line current of the alternating current and the voltage division of a corresponding resistor in a first sampling loop;
the second data processing module calculates a second path of power of the alternating current based on the live wire current of the received alternating current and the voltage division of the corresponding resistor in the second sampling loop.
The beneficial effects of the invention are as follows:
converting a circuit needing isolated metering into non-isolated metering by adopting a mode of mutually converting a live wire and a zero wire into reference ground; and the variable live wire and zero line are adopted, and a sampling circuit is used for dynamically sampling the variable alternating voltage, so that the accurate value of the voltage can be measured respectively. And the alternating current characteristic of the commercial power is utilized to separate two groups of independent power supplies in different power supply states for the first data processing module and the second data processing module respectively, and the isolation device is not required to be adopted for segmentation processing. The production cost of the electric energy meter is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a dual-power calculation single-phase electric energy meter for non-isolated sampling alternating current according to the present invention.
Fig. 2 is a circuit diagram of a first data processing module according to the invention.
Fig. 3 is a circuit diagram of a second data processing module according to the invention.
Fig. 4 is a circuit diagram of a live current sampling circuit according to the present invention.
Fig. 5 is a circuit diagram of a zero line current sampling circuit according to the present invention.
Fig. 6 is a circuit diagram of a dynamic voltage sampling circuit according to the present invention.
FIG. 7 is a flow chart of a method for calculating dual power of non-isolated sampled alternating current according to the invention.
Detailed Description
The following specific examples are presented to illustrate the present invention, and those skilled in the art will readily appreciate the additional advantages and capabilities of the present invention as disclosed herein. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
Embodiment one:
the alternating current described in this embodiment may be mains supply with a frequency of 50Hz, distributed sinusoidally.
Referring to fig. 1, the embodiment provides a double-power calculation single-phase electric energy meter for non-isolated sampling alternating current, which comprises a first data processing module, a second data processing module, a live wire current sampling circuit, a zero line current sampling circuit and a dynamic voltage sampling circuit; the first data processing module is respectively connected with the zero line current sampling circuit and the dynamic voltage sampling circuit; the second data processing module is respectively connected with the live wire current sampling circuit and the dynamic voltage sampling circuit;
the live wire current sampling circuit takes a zero line as a reference ground to collect live wire current of alternating current; the zero line current sampling circuit takes a live wire as a reference ground to collect zero line current of alternating current; the dynamic voltage sampling circuit is provided with a first sampling loop taking a live wire as reference ground and a second sampling loop taking a zero wire as reference ground, and the dynamic voltage sampling circuit collects zero wire voltage of alternating current (namely voltage of an alternating current negative half shaft) through the first sampling loop and the second sampling loop collects live wire voltage of the alternating current (namely voltage of an alternating current positive half shaft) based on alternating current characteristics;
the first data processing module calculates and obtains a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current; the second data processing module calculates a second path of power of the alternating current based on the live wire current and the live wire voltage of the alternating current.
Therefore, the circuit needing to be measured in an isolated manner is converted into non-isolated measurement by adopting a mode that a live wire and a zero wire are mutually converted into reference ground; and the variable live wire and zero line are adopted, and a sampling circuit is used for dynamically sampling the variable alternating voltage, so that the accurate value of the voltage can be measured respectively. By utilizing the alternating current characteristic of the commercial power, two groups of independent power supplies in different power supply states are separated and respectively used for the first data processing module and the second data processing module, and the isolation devices are not needed for segmentation processing, such as a mutual inductor, so that the production cost of the electric energy meter is reduced.
Specifically:
the first data processing module comprises a data processing unit and a display unit which are connected, and the data processing unit is also connected with the second data processing module;
the data processing unit is used for calculating to obtain a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current, and calculating to obtain the total power of the alternating current based on the first path of power of the alternating current and the second path of power of the alternating current;
and the display unit is used for displaying the total power of the alternating current.
Here, the display unit may also display the first path power data and the second path power data separately.
More specifically:
referring to fig. 2, in this embodiment, the first data processing module uses an HT5017 chip, and the corresponding circuit positions of the chip are all referenced to the ground by using the fire wire, and the specific circuit structure can be shown in fig. 2.
Referring to fig. 3, the second data processing module in this embodiment adopts a V9240 chip, and the corresponding circuit positions of the chip are all referenced to the ground by a zero line, and the specific circuit structure can be shown in fig. 3.
Referring to fig. 4, the live wire current sampling circuit includes a first current collection terminal IN-2, a first resistor R63 (100 ohms), a first capacitor C73 (100 NF), a second capacitor C74 (100 NF), a second resistor R64 (100 ohms), a second current collection terminal in+2, and a third capacitor C75 (10 NF) connected IN parallel with the first capacitor C73 and the second capacitor C74 IN series, where the junction between the first capacitor and the second capacitor uses a zero line as a reference ground, and two ends of the third capacitor C75 are respectively connected with a LAN pin and a LAP pin of the V9240 chip IN the second data processing module.
The circuit is used for collecting live wire current, takes a zero line as a reference ground, enters from a first current collecting end IN-2 and a second current collecting end IN+2, respectively passes through a first-order low-pass filter (for example, a first-order low-pass filter consisting of a second resistor R64 and a second capacitor C74 and is used for filtering interference of high-frequency waves) and then enters into a second data processing module.
Referring to fig. 5, the zero line current sampling circuit includes a third current collecting terminal il+, a third resistor R90 (1.2 k), a fourth capacitor C82 (33 NF), a fifth capacitor C83 (33 NF), a fourth resistor R91 (1.2 k), and a fourth current collecting terminal IL-, where a connection point between the fourth capacitor C82 and the fifth capacitor C83 uses a live wire as a reference ground, and a connection point between the third resistor R90 and the fourth capacitor C82 is connected with a VIP pin of an HT5017 chip in the first data processing module, and a connection point between the fifth capacitor C83 and the fourth resistor R91 is connected with a VIN pin of an HT5017 chip in the first data processing module.
The circuit is used for collecting zero line current, takes a live wire as a reference ground, and enters a first data processing module from a third current collecting end IL+ and a fourth current collecting end IL-, after passing through a first-order low-pass filter respectively.
Referring to fig. 6, the dynamic voltage sampling circuit includes a fifth resistor R88 (1.2 k), a sixth resistor R87 (1.2 k), a seventh resistor R81 (200 k), an eighth resistor R79 (200 k), a ninth resistor R78 (200 k), a tenth resistor R80 (200 k), an eleventh resistor R82 (200 k), a twelfth resistor R86 (200 k), and a thirteenth resistor R89 (1.2 k) connected in series in this order.
The fifth resistor R88 and the sixth resistor R87 which are connected in series are connected in parallel with the seventh capacitor C81 (33 NF) and the eighth capacitor C80 (33 NF) which are connected in series; the connection part between the fifth resistor R88 and the sixth resistor R87 and the connection part between the seventh capacitor C81 and the eighth capacitor C80 take the live wire as the reference ground; the connection part of the fifth resistor R88 and the seventh capacitor C81 and the connection part of the sixth resistor R87 and the eighth capacitor C80 are respectively connected with the V3N pin and the V3P pin of the HT5017 chip in the first data processing module.
The thirteenth resistor R89 is connected with the sixth capacitor C79 (33 NF) in parallel, the connection part of the thirteenth resistor R89 and the sixth capacitor C79 takes a zero line as the reference ground, and the connection part of the thirteenth resistor R89 and the other end of the sixth capacitor C79 is connected with the UAP pin of the V9240 chip in the second data processing module.
The positions connected with the V3N pin, the V3P pin and the UAP pin in the dynamic voltage sampling circuit are also used for sampling alternating current.
The circuit is a dynamic voltage sampling circuit, when a live wire is used as a reference ground, signals are sampled from a first sampling loop of R89 and R86= > R81, zero line voltage of alternating current is collected, and at the moment, the voltage input to a first data processing module is the partial voltage of a sixth resistor R87; when the zero line is taken as the reference ground, the signal is sampled from a second sampling loop of R87 and R81= > R86, the live line voltage of the alternating current is collected, and the voltage input to the second data processing module is the voltage division of a thirteenth resistor R89.
It should be noted that, the voltage division mode adopted here can avoid the damage of the chip in the module caused by the overlarge voltage input into the first data processing module and the second data processing module, and also avoid the damage of each resistor in the dynamic voltage sampling circuit caused by the overlarge voltage division.
It should be noted that, since the voltage input to the first data processing module is the divided voltage of the sixth resistor R87 and the voltage input to the second data processing module is the divided voltage of the thirteenth resistor R89, the first data processing module and the second data processing module need to convert the divided voltages to obtain the real neutral line voltage and the real live line voltage of the alternating current when performing the power calculation.
The dynamic voltage sampling circuit, the live wire current sampling circuit and the zero line current sampling circuit are all sampled by manganese copper. In the complete metering process, the voltage data are always in an equilibrium state, so that the data of the manganese-copper sampling current are not interfered; the power supplies are mutually referenced to the ground, and the power supplies are in a balanced state, so that a long-term power-down state is not generated, and the metering unbalance phenomenon is not generated.
Embodiment two:
referring to fig. 7, the present embodiment provides a method for calculating dual power of non-isolated sampled ac, based on the dual power calculation single-phase electric energy meter of the non-isolated sampled ac in the first embodiment, comprising the steps of:
s1, based on alternating current characteristics, a live wire current sampling circuit collects live wire current of alternating current by taking a live wire as a reference ground, and a zero wire current sampling circuit collects zero wire current of the alternating current by taking the live wire as the reference ground; based on the alternating current characteristics, the dynamic voltage sampling circuit circularly collects the zero line voltage of the alternating current through the first sampling loop and the live line voltage of the alternating current through the second sampling loop;
s2, a first data processing module calculates and obtains a first path of power of the alternating current based on the live wire current and the live wire voltage of the received alternating current; the second data processing module calculates a second path of power of the alternating current based on the received zero line current and zero line voltage of the alternating current.
In step S2, the first data processing module further calculates the total power of the ac power based on the first power and the second power of the received ac power.
In step S1:
the first sampling loop collects zero line voltage of alternating current and inputs voltage division of corresponding resistors in the first sampling loop into the second data processing module;
the second sampling loop collects the live wire voltage of the alternating current and inputs the voltage division of the corresponding resistor in the second sampling loop into the first data processing module;
in step S2:
the first data processing module calculates and obtains a first path of power of the alternating current based on the live wire current of the received alternating current and the voltage division of a corresponding resistor in the second sampling loop;
the second data processing module calculates a second path of power of the alternating current based on the received zero line current of the alternating current and the voltage division of the corresponding resistor in the first sampling loop.
It should be noted that, in the method for calculating dual power of non-isolated sampling ac power provided in this embodiment, similar to the embodiment, a description is omitted here.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. The double-power calculation single-phase electric energy meter for non-isolated sampling alternating current is characterized by comprising a first data processing module, a second data processing module, a live wire current sampling circuit, a zero line current sampling circuit and a dynamic voltage sampling circuit; the first data processing module is respectively connected with the zero line current sampling circuit and the dynamic voltage sampling circuit; the second data processing module is respectively connected with the live wire current sampling circuit and the dynamic voltage sampling circuit;
the live wire current sampling circuit takes a zero line as a reference ground to collect live wire current of alternating current; the zero line current sampling circuit takes a live wire as a reference ground to collect zero line current of alternating current; the dynamic voltage sampling circuit is provided with a first sampling loop taking a live wire as reference ground and a second sampling loop taking a zero wire as reference ground, and the dynamic voltage sampling circuit is used for collecting the zero wire voltage of the alternating current through the first sampling loop and the live wire voltage of the alternating current through the second sampling loop based on alternating current characteristics;
the first data processing module calculates and obtains a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current; the second data processing module calculates a second path of power of the alternating current based on the live wire current and the live wire voltage of the alternating current;
the dynamic voltage sampling circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a thirteenth resistor which are sequentially connected in series;
the fifth resistor and the sixth resistor which are connected in series are connected in parallel with the seventh capacitor and the eighth capacitor which are connected in series; the connection part between the fifth resistor and the sixth resistor and the connection part between the seventh capacitor and the eighth capacitor are all grounded by taking a live wire as a reference; the connection part of the fifth resistor and the seventh capacitor is connected with the first data processing module;
the thirteenth resistor is connected with the sixth capacitor in parallel, the connection part of the thirteenth resistor and the sixth capacitor takes a zero line as the reference ground, and the connection part of the thirteenth resistor and the other end of the sixth capacitor is connected with the second data processing module;
the circuits in the first data processing module all take a live wire as a reference ground, and the circuits in the second data processing module all take a zero wire as a reference ground;
the dynamic voltage sampling circuit, the live wire current sampling circuit and the zero line current sampling circuit are all sampled by manganese copper.
2. The double-power calculation single-phase electric energy meter of non-isolated sampling alternating current according to claim 1, wherein the first data processing module comprises a data processing unit and a display unit which are connected, and the data processing unit is also connected with the second data processing module;
the data processing unit is used for calculating to obtain a first path of power of the alternating current based on the zero line current and the zero line voltage of the alternating current, and calculating to obtain the total power of the alternating current based on the first path of power of the alternating current and the second path of power of the alternating current;
and the display unit is used for displaying the total power of the alternating current.
3. The double-power calculation single-phase electric energy meter of non-isolated sampling alternating current according to claim 1, wherein the live wire current sampling circuit comprises a first current acquisition end, a first resistor, a first capacitor, a second resistor and a second current acquisition end which are sequentially connected in series, and further comprises a third capacitor connected in parallel with the first capacitor and the second capacitor in series, the junction between the first capacitor and the second capacitor takes a zero line as a reference ground, and both ends of the third capacitor are connected with the second data processing module.
4. The double-power calculation single-phase electric energy meter of non-isolated sampling alternating current according to claim 1, wherein the zero line current sampling circuit comprises a third current acquisition end, a third resistor, a fourth capacitor, a fifth capacitor, a fourth resistor and a fourth current acquisition end which are sequentially connected in series, the connection part between the fourth capacitor and the fifth capacitor takes a live wire as a reference ground, the connection part between the third resistor and the fourth capacitor is connected with the first data processing module, and the connection part between the fifth capacitor and the fourth resistor is connected with the first data processing module.
5. A double-power calculation method of non-isolated sampling alternating current based on the double-power calculation single-phase electric energy meter of the non-isolated sampling alternating current according to any one of claims 1 to 4, characterized by comprising the steps of:
s1, based on alternating current characteristics, a live wire current sampling circuit collects live wire current of alternating current by taking a live wire as a reference ground, and a zero wire current sampling circuit collects zero wire current of the alternating current by taking the live wire as the reference ground; based on the alternating current characteristics, the dynamic voltage sampling circuit circularly collects the zero line voltage of the alternating current through the first sampling loop and the live line voltage of the alternating current through the second sampling loop;
s2, the first data processing module calculates and obtains a first path of power of the alternating current based on the received zero line current and zero line voltage of the alternating current; the second data processing module calculates a second path of power of the alternating current based on the received live wire current and live wire voltage of the alternating current.
6. The method according to claim 5, wherein in step S2, the first data processing module further calculates the total power of the ac power based on the first power and the second power of the received ac power.
7. The method for calculating the dual power of the non-isolated sampled ac power of claim 5, wherein in step S1:
the first sampling loop collects zero line voltage of alternating current and inputs voltage division of corresponding resistors in the first sampling loop into the first data processing module;
the second sampling loop collects the live wire voltage of the alternating current and inputs the voltage division of the corresponding resistor in the second sampling loop into the second data processing module;
in step S2:
the first data processing module calculates and obtains a first path of power of the alternating current based on the received zero line current of the alternating current and the voltage division of a corresponding resistor in a first sampling loop;
the second data processing module calculates a second path of power of the alternating current based on the live wire current of the received alternating current and the voltage division of the corresponding resistor in the second sampling loop.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437059A (en) * | 1980-10-21 | 1984-03-13 | Rochester Instrument Systems, Inc. | Wattmeter |
| CN102072978A (en) * | 2011-01-25 | 2011-05-25 | 武汉盛帆电子股份有限公司 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
| JP2011179988A (en) * | 2010-03-01 | 2011-09-15 | Chugoku Electric Power Co Inc:The | Digital test plug, and method for measuring electric power and phase using the same |
| CN203658459U (en) * | 2013-10-31 | 2014-06-18 | 珠海中慧微电子有限公司 | Metering circuit based on SWF2L23A type chip |
| CN204479646U (en) * | 2014-10-08 | 2015-07-15 | 深圳市华士精成科技有限公司 | A kind of equipment control electronic tag current detection circuit |
| CN105932766A (en) * | 2016-04-18 | 2016-09-07 | 杭州海兴电力科技股份有限公司 | Power supply circuit, single-phase single-line metering circuit, and metering method |
| CN205608084U (en) * | 2016-04-18 | 2016-09-28 | 杭州海兴电力科技股份有限公司 | Single -phase single line metering circuit |
| CN107064587A (en) * | 2016-12-13 | 2017-08-18 | 浙江恒业电子有限公司 | A kind of electric energy meter circuit |
| CN207457370U (en) * | 2017-09-22 | 2018-06-05 | 武汉微智创大科技有限公司 | A kind of three-phase multiple loop radio energy harvester |
| CN210119522U (en) * | 2019-05-22 | 2020-02-28 | 重庆国翰能源发展有限公司 | Electric energy metering device for alternating-current charging pile |
| WO2020232993A1 (en) * | 2019-05-17 | 2020-11-26 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
| CN111999554A (en) * | 2020-08-25 | 2020-11-27 | 成都长城开发科技有限公司 | Zero line detection circuit, ammeter and zero line detection method |
| CN112034233A (en) * | 2020-08-31 | 2020-12-04 | 国网山东省电力公司电力科学研究院 | High-precision alternating current testing device and method |
| CN112325462A (en) * | 2020-10-11 | 2021-02-05 | 浙江晨泰科技股份有限公司 | Intelligent air conditioner metering module |
| CN212950218U (en) * | 2020-08-21 | 2021-04-13 | 深圳市睿通信息科技有限公司 | Low-cost non-isolated charging pile |
| CN113125839A (en) * | 2021-04-26 | 2021-07-16 | 深圳市合广测控技术有限公司 | Non-isolated voltage sampling circuit, voltage sampling system and electric quantity metering device |
| WO2021212840A1 (en) * | 2020-09-07 | 2021-10-28 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection circuit, electric leakage protection circuit, and household appliance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049499A1 (en) * | 2007-10-17 | 2009-04-23 | Jiasheng Wan | A modular electronic energy meter |
-
2023
- 2023-04-12 CN CN202310382767.4A patent/CN116106623B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437059A (en) * | 1980-10-21 | 1984-03-13 | Rochester Instrument Systems, Inc. | Wattmeter |
| JP2011179988A (en) * | 2010-03-01 | 2011-09-15 | Chugoku Electric Power Co Inc:The | Digital test plug, and method for measuring electric power and phase using the same |
| CN102072978A (en) * | 2011-01-25 | 2011-05-25 | 武汉盛帆电子股份有限公司 | Single-phase double-circuit manganese copper metering anti-theft electric charge-controlled intelligent electric energy meter |
| CN203658459U (en) * | 2013-10-31 | 2014-06-18 | 珠海中慧微电子有限公司 | Metering circuit based on SWF2L23A type chip |
| CN204479646U (en) * | 2014-10-08 | 2015-07-15 | 深圳市华士精成科技有限公司 | A kind of equipment control electronic tag current detection circuit |
| CN105932766A (en) * | 2016-04-18 | 2016-09-07 | 杭州海兴电力科技股份有限公司 | Power supply circuit, single-phase single-line metering circuit, and metering method |
| CN205608084U (en) * | 2016-04-18 | 2016-09-28 | 杭州海兴电力科技股份有限公司 | Single -phase single line metering circuit |
| CN107064587A (en) * | 2016-12-13 | 2017-08-18 | 浙江恒业电子有限公司 | A kind of electric energy meter circuit |
| CN207457370U (en) * | 2017-09-22 | 2018-06-05 | 武汉微智创大科技有限公司 | A kind of three-phase multiple loop radio energy harvester |
| WO2020232993A1 (en) * | 2019-05-17 | 2020-11-26 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
| CN210119522U (en) * | 2019-05-22 | 2020-02-28 | 重庆国翰能源发展有限公司 | Electric energy metering device for alternating-current charging pile |
| CN212950218U (en) * | 2020-08-21 | 2021-04-13 | 深圳市睿通信息科技有限公司 | Low-cost non-isolated charging pile |
| CN111999554A (en) * | 2020-08-25 | 2020-11-27 | 成都长城开发科技有限公司 | Zero line detection circuit, ammeter and zero line detection method |
| CN112034233A (en) * | 2020-08-31 | 2020-12-04 | 国网山东省电力公司电力科学研究院 | High-precision alternating current testing device and method |
| WO2021212840A1 (en) * | 2020-09-07 | 2021-10-28 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection circuit, electric leakage protection circuit, and household appliance |
| CN112325462A (en) * | 2020-10-11 | 2021-02-05 | 浙江晨泰科技股份有限公司 | Intelligent air conditioner metering module |
| CN113125839A (en) * | 2021-04-26 | 2021-07-16 | 深圳市合广测控技术有限公司 | Non-isolated voltage sampling circuit, voltage sampling system and electric quantity metering device |
Non-Patent Citations (1)
| Title |
|---|
| 电量计量芯片HLW8110的前端电路设计与误差分析校正;龙顺宇;许禄枝;邝国旺;徐元哲;吴路光;;单片机与嵌入式系统应用(03);全文 * |
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