CN211014450U - Electrical quantity acquisition device of power distribution equipment - Google Patents
Electrical quantity acquisition device of power distribution equipment Download PDFInfo
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- CN211014450U CN211014450U CN201921440639.6U CN201921440639U CN211014450U CN 211014450 U CN211014450 U CN 211014450U CN 201921440639 U CN201921440639 U CN 201921440639U CN 211014450 U CN211014450 U CN 211014450U
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- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 description 23
- 230000008859 change Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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Abstract
The utility model relates to an electric quantity acquisition device of distribution equipment, which comprises an anode probe, a cathode probe, a diode D1, a resistor R1, an alternating current and direct current voltage acquisition circuit, an alternating current and direct current acquisition circuit, a voltage following circuit, a signal isolation amplifying circuit and a control processing circuit; a diode D1 and a resistor R1 are sequentially connected in series between the anode probe and the cathode probe; the positive input end of the alternating current and direct current voltage acquisition circuit is connected to the common end of the diode D1 and the resistor R1, and the negative input end of the alternating current and direct current voltage acquisition circuit is connected to the negative probe; the positive input end of the alternating current and direct current acquisition circuit is connected to the common end of the diode D1 and the resistor R1, the negative input end of the alternating current and direct current acquisition circuit is connected to the negative probe, and the output end of the alternating current and direct current voltage acquisition circuit and the output end of the alternating current and direct current acquisition circuit are connected to the control processing circuit sequentially through the voltage following circuit and the signal isolation amplifying circuit. The utility model can collect the AC/DC voltage and the AC/DC current without replacing or disassembling the circuit, and is convenient to use.
Description
Technical Field
The utility model relates to a distribution equipment field, concretely relates to distribution equipment's electric volume collection system.
Background
In recent years, along with the continuous acceleration of the construction speed of a power grid, the number of power distribution equipment is increased rapidly, the types of the power distribution equipment are various, the updating and the change are frequent, the operation and the use conditions of the equipment need to be mastered in real time, the equipment is tracked in real time, and the operation and maintenance management of the power distribution equipment is enhanced. In the process of operation and maintenance management of the power distribution equipment, the most important thing is to collect the alternating current and direct current voltage data and alternating current and direct current data of the power distribution equipment, the existing common signal sampling circuit can only sample alternating current voltage signals or alternating current signals or can only sample direct current voltage signals or sample direct current signals, even if the sampling of the alternating current and direct current voltages and the alternating current and direct current can be realized, the sampling can be realized by manually short-circuiting a resistor or replacing a circuit board, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an electrical volume collection system of distribution equipment is provided, distribution equipment's alternating current-direct current voltage and alternating current-direct current, convenient to use can be gathered.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an electric quantity acquisition device of power distribution equipment comprises an anode probe, a cathode probe, a diode D1, a resistor R1, an alternating current and direct current voltage acquisition circuit, an alternating current and direct current acquisition circuit, a voltage following circuit, a signal isolation amplifying circuit and a control processing circuit; the diode D1 and the resistor R1 are sequentially connected in series between the anode probe and the cathode probe; the positive input end of the alternating current and direct current voltage acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K1, the negative input end of the alternating current and direct current voltage acquisition circuit is connected to the negative probe through a digital switch K2, and the output end of the alternating current and direct current voltage acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the positive input end of the alternating current and direct current acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K3, the negative input end of the alternating current and direct current acquisition circuit is connected to the negative probe through a digital switch K4, and the output end of the alternating current and direct current acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the control processing circuit is also connected with the digital switch K1, the digital switch K2, the digital switch K3 and the digital switch K4.
The utility model has the advantages that: the utility model relates to an electric volume collection system of distribution equipment can judge what kind of signal is what kind of signal of sampling signal on positive and negative pole probe through the voltage change at resistance R1 both ends, if the voltage value at resistance R1 both ends is unchangeable, then judges that the sampling signal is the direct current voltage signal; if the voltage values at the two ends of the resistor R1 change in a step mode, judging that the sampling signal is a direct current signal; if the voltage at the two ends of the resistor R1 is a half-wave signal with unchanged amplitude, judging that the sampling signal is an alternating-current voltage signal; if the voltage at the two ends of the resistor R1 is a half-wave signal with amplitude step change, judging that the sampling signal is an alternating current signal; the control processing circuit controls the on-off of a digital switch K1, a digital switch K2, a digital switch K3 and a digital switch K4 according to the type of the sampling signal, and realizes AC/DC voltage acquisition and AC/DC current acquisition through an AC/DC voltage acquisition circuit, an AC/DC current acquisition circuit, a voltage following circuit and a signal isolation amplifying circuit; when the sampling signal is a direct-current voltage signal, the voltage is divided by a resistor R2 and a resistor R2; when the sampling signal is an alternating voltage signal, the diode D1 filters the negative half cycle of the signal, the positive half cycle signal is divided by the resistor R2 and the resistor R2, and the voltage signal at the two ends of the resistor R2 is input to the voltage following circuit and the signal isolation amplifying circuit through the resistor R3 and then is output to the control processing circuit after being converted; when the sampling signal is a direct current signal, the direct current signal is converted into a voltage signal through a shunt F; when the sampling signal is an alternating current signal, the diode D1 filters the negative half cycle of the signal, the positive half cycle signal is converted into a voltage signal through the shunt F, and the voltage signal at the two ends of the shunt F is input to the voltage following circuit and the signal isolation amplifying circuit through the resistor R4 and then is output to the control processing circuit after being converted; this practicality need not be with trading or dismantle the alternating current-direct current voltage and the alternating current-direct current electric current that distribution equipment just can gather, convenient to use.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the alternating current-direct current voltage acquisition circuit comprises a resistor R2, a resistor R3 and a resistor R4, one end of the resistor R2 is connected to the common end of the diode D1 and the resistor R1 through a digital switch K1, the other end of the resistor R2 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the negative electrode probe through a digital switch K2, one end of the resistor R4 is connected to the common end of the resistor R2 and the resistor R3, and the other end of the resistor R4 is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence.
Further, alternating current-direct current acquisition circuit includes shunt F and resistance R5, shunt F's one end is passed through digital switch K3 and is connected diode D1 with on resistance R1's the common port, shunt F's the other end is passed through digital switch K4 and is connected on the negative pole probe, resistance R5's one end is connected digital switch K3 with on shunt F's the common port, resistance R5's the other end voltage following circuit with signal isolation amplifier circuit connects on the control processing circuit.
Further, the control processing circuit is specifically a single chip with an analog-to-digital conversion function, and an output end of the signal isolation amplifying circuit is connected to an analog-to-digital conversion interface of the control processing circuit.
Drawings
Fig. 1 is a schematic diagram of an overall circuit structure of an electrical quantity collecting device of a power distribution apparatus according to the present invention;
FIG. 2 is a schematic diagram of an AC/DC voltage acquisition circuit;
FIG. 3 is a schematic structural diagram of an AC/DC current collection circuit;
FIG. 4 is a schematic diagram of a voltage follower circuit;
fig. 5 is a schematic structural diagram of a signal isolation amplifying circuit.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an electrical quantity collecting device of a power distribution apparatus includes an anode probe, a cathode probe, a diode D1, a resistor R1, an ac/dc voltage collecting circuit, an ac/dc current collecting circuit, a voltage follower circuit, a signal isolation amplifying circuit, and a control processing circuit; the diode D1 and the resistor R1 are sequentially connected in series between the anode probe and the cathode probe; the positive input end of the alternating current and direct current voltage acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K1, the negative input end of the alternating current and direct current voltage acquisition circuit is connected to the negative probe through a digital switch K2, and the output end of the alternating current and direct current voltage acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the positive input end of the alternating current and direct current acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K3, the negative input end of the alternating current and direct current acquisition circuit is connected to the negative probe through a digital switch K4, and the output end of the alternating current and direct current acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the control processing circuit is also connected with the digital switch K1, the digital switch K2, the digital switch K3 and the digital switch K4.
In this particular embodiment: as shown in fig. 2, the ac/dc voltage collecting circuit includes a resistor R2, a resistor R3, and a resistor R4, one end of the resistor R2 is connected to the common terminal of the diode D1 and the resistor R1 through a digital switch K1, the other end of the resistor R2 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the negative probe through a digital switch K2, one end of the resistor R4 is connected to the common terminal of the resistor R2 and the resistor R3, and the other end of the resistor R4 is connected to the control processing circuit through the voltage follower circuit and the signal isolation amplifier circuit in sequence.
In this particular embodiment: as shown in fig. 3, the ac/dc current collecting circuit includes a shunt F and a resistor R5, one end of the shunt F is connected to the common terminal of the diode D1 and the resistor R1 through a digital switch K3, the other end of the shunt F is connected to the negative probe through a digital switch K4, one end of the resistor R5 is connected to the common terminal of the digital switch K3 and the shunt F, and the other end of the resistor R5 is connected to the voltage follower circuit and the signal isolation amplifier circuit.
In this particular embodiment: the control processing circuit is a singlechip with an analog-to-digital conversion function, and the output end of the signal isolation amplifying circuit is connected to an analog-to-digital conversion interface of the control processing circuit.
In the present embodiment, the structure of the voltage follower circuit is shown in fig. 4; the structure of the signal isolation amplifying circuit is shown in fig. 5; the single chip microcomputer can be an STM32F103VET single chip microcomputer.
The utility model relates to an electric volume collection system of distribution equipment can judge what kind of signal is what kind of signal of sampling signal on positive and negative pole probe through the voltage change at resistance R1 both ends, if the voltage value at resistance R1 both ends is unchangeable, then judges that the sampling signal is the direct current voltage signal; if the voltage values at the two ends of the resistor R1 change in a step mode, judging that the sampling signal is a direct current signal; if the voltage at the two ends of the resistor R1 is a half-wave signal with unchanged amplitude, judging that the sampling signal is an alternating-current voltage signal; if the voltage at the two ends of the resistor R1 is a half-wave signal with amplitude step change, judging that the sampling signal is an alternating current signal; the control processing circuit controls the on-off of a digital switch K1, a digital switch K2, a digital switch K3 and a digital switch K4 according to the type of the sampling signal, and realizes AC/DC voltage acquisition and AC/DC current acquisition through an AC/DC voltage acquisition circuit, an AC/DC current acquisition circuit, a voltage following circuit and a signal isolation amplifying circuit; when the sampling signal is a direct-current voltage signal, the voltage is divided by a resistor R2 and a resistor R2; when the sampling signal is an alternating voltage signal, the diode D1 filters the negative half cycle of the signal, the positive half cycle signal is divided by the resistor R2 and the resistor R2, and the voltage signal at the two ends of the resistor R2 is input to the voltage following circuit and the signal isolation amplifying circuit through the resistor R3 and then is output to the control processing circuit after being converted; when the sampling signal is a direct current signal, the direct current signal is converted into a voltage signal through a shunt F; when the sampling signal is an alternating current signal, the diode D1 filters the negative half cycle of the signal, the positive half cycle signal is converted into a voltage signal through the shunt F, and the voltage signal at the two ends of the shunt F is input to the voltage following circuit and the signal isolation amplifying circuit through the resistor R4 and then is output to the control processing circuit after being converted; this practicality need not be with trading or dismantle the alternating current-direct current voltage and the alternating current-direct current electric current that distribution equipment just can gather, convenient to use.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. The utility model provides an electrical volume collection system of distribution equipment which characterized in that: the device comprises an anode probe, a cathode probe, a diode D1, a resistor R1, an alternating current and direct current voltage acquisition circuit, an alternating current and direct current acquisition circuit, a voltage following circuit, a signal isolation amplifying circuit and a control processing circuit; the diode D1 and the resistor R1 are sequentially connected in series between the anode probe and the cathode probe; the positive input end of the alternating current and direct current voltage acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K1, the negative input end of the alternating current and direct current voltage acquisition circuit is connected to the negative probe through a digital switch K2, and the output end of the alternating current and direct current voltage acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the positive input end of the alternating current and direct current acquisition circuit is connected to the common end of the diode D1 and the resistor R1 through a digital switch K3, the negative input end of the alternating current and direct current acquisition circuit is connected to the negative probe through a digital switch K4, and the output end of the alternating current and direct current acquisition circuit is connected to the control processing circuit through the voltage following circuit and the signal isolation amplifying circuit in sequence; the control processing circuit is also connected with the digital switch K1, the digital switch K2, the digital switch K3 and the digital switch K4.
2. The electrical quantity collecting device of the power distribution equipment according to claim 1, wherein: alternating current-direct current voltage acquisition circuit includes resistance R2, resistance R3 and resistance R4, digital switch K1 is passed through to resistance R2's one end and is connected diode D1 with on resistance R1's the common port, resistance R2's the other end is connected on resistance R3's one end, resistance R3's the other end passes through digital switch K2 and connects on the negative pole probe, resistance R4's one end is connected resistance R2 with on resistance R3's the common port, resistance R4's the other end loops through voltage follower circuit with signal isolation amplifier circuit connects on the control processing circuit.
3. The electrical quantity collecting device of the power distribution equipment according to claim 1, wherein: alternating current-direct current acquisition circuit includes shunt F and resistance R5, digital switch K3 is passed through to shunt F's one end and is connected diode D1 with on resistance R1's the common port, shunt F's the other end passes through digital switch K4 and connects on the negative pole probe, resistance R5's one end is connected digital switch K3 with on shunt F's the common port, resistance R5's the other end voltage follower circuit with signal isolation amplifier circuit connects on the control processing circuit.
4. An electrical quantity collection device for electrical distribution equipment according to any one of claims 1 to 3, wherein: the control processing circuit is a singlechip with an analog-to-digital conversion function, and the output end of the signal isolation amplifying circuit is connected to an analog-to-digital conversion interface of the control processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440639.6U CN211014450U (en) | 2019-08-30 | 2019-08-30 | Electrical quantity acquisition device of power distribution equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440639.6U CN211014450U (en) | 2019-08-30 | 2019-08-30 | Electrical quantity acquisition device of power distribution equipment |
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| Publication Number | Publication Date |
|---|---|
| CN211014450U true CN211014450U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921440639.6U Expired - Fee Related CN211014450U (en) | 2019-08-30 | 2019-08-30 | Electrical quantity acquisition device of power distribution equipment |
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| Country | Link |
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| CN (1) | CN211014450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833479A (en) * | 2024-03-06 | 2024-04-05 | 国网山东省电力公司日照供电公司 | Private change monitoring alarm device for distribution line |
-
2019
- 2019-08-30 CN CN201921440639.6U patent/CN211014450U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833479A (en) * | 2024-03-06 | 2024-04-05 | 国网山东省电力公司日照供电公司 | Private change monitoring alarm device for distribution line |
| CN117833479B (en) * | 2024-03-06 | 2024-06-07 | 国网山东省电力公司日照供电公司 | Private change monitoring alarm device for distribution line |
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Granted publication date: 20200714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |