CN211318615U - Intelligent metering and measuring device for distribution line - Google Patents
Intelligent metering and measuring device for distribution line Download PDFInfo
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- CN211318615U CN211318615U CN201921751660.8U CN201921751660U CN211318615U CN 211318615 U CN211318615 U CN 211318615U CN 201921751660 U CN201921751660 U CN 201921751660U CN 211318615 U CN211318615 U CN 211318615U
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Abstract
The utility model provides an intelligent metering and measuring device for a distribution line, which comprises three line sensors respectively arranged on three phase lines of the distribution line, a data concentrator arranged on a telegraph pole, and an installation accessory used for fixing the line sensors and the data concentrator; each line sensor is connected with one end of the data collector through a cable, the other end of the data collector is connected with the ground terminal, the line sensors are used for measuring voltage output signals, current output signals and power output signals of the phase line where the line sensors are located and transmitting the voltage output signals, the current output signals and the power output signals to the data collector through the cable, and the data collector is used for collecting the voltage output signals and the current output signals and supplying power to the line sensors through the power output signals. The utility model provides a distribution lines smart measurement measuring device installs on built on stilts distribution lines, realizes smart measurement and measurement to the line behavior, and it is convenient to install, and measurement accuracy is high, can wide application in distribution automation, ubiquitous electric power thing networking and smart power grids system.
Description
Technical Field
The utility model relates to a distribution lines technical field, in particular to distribution lines intelligent measurement measuring device.
Background
The distribution line is an important component of the smart power grid, and has the main characteristics of wide coverage, long line and easy damage from natural disasters such as severe weather, so that the detection and measurement of the distribution line are very important.
In recent years, although the power grid industry is rapidly developed, the line detection work in the process of the distribution network still needs manual operation, which inevitably causes the omission of the inspection and has certain potential safety hazard. The conventional measuring instrument is generally simple in structure, single in function and insufficient in measuring precision and stability, and is difficult to meet the requirement of increasingly developing monitoring of the power distribution network.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a distribution lines intelligent measurement measuring device carries out intelligent measurement and measurement to the line behavior, and it is convenient to install to realize high accuracy, high stability and multi-functional measurement.
In order to solve the technical problem, an embodiment of the present invention provides an intelligent metering and measuring device for a distribution line, including three line sensors respectively installed on three phase lines of the distribution line, a data concentrator installed on a wire pole, and an installation accessory for fixing the line sensors and the data concentrator;
each line sensor is connected with one end of the data concentrator through a cable, the other end of the data concentrator is connected with a ground terminal, the line sensors are used for measuring voltage output signals, current output signals and power output signals of the phase line where the line sensors are located and transmitting the voltage output signals, the current output signals and the power output signals to the data concentrator through the cable, and the data concentrator is used for collecting the voltage output signals and the current output signals and supplying power to the line sensors through the power output signals.
Preferably, the line sensor includes a voltage transformer, a current transformer and a power transformer, the voltage transformer is used for measuring the voltage output signal, the current transformer is used for measuring the current output signal, and the power transformer is used for measuring the power output signal.
Preferably, the voltage transformer includes a first capacitor and a second capacitor connected in series, one end of the first capacitor is connected to the phase line where the first capacitor is located, the other end of the first capacitor is connected to the second capacitor, one end of the second capacitor is connected to the first capacitor, the other end of the second capacitor is connected to the ground terminal, and the voltage output signal is obtained by measuring the two ends of the second capacitor.
Preferably, current transformer include with the iron core coil of place phase line electromagnetic induction and with first resistance and the second resistance that the iron core coil establishes ties in proper order, the iron core coil first resistance with the second resistance forms the confined return circuit, current output signal is through measuring the both ends of first resistance are acquireed.
Preferably, the electricity-taking mutual inductor comprises a third capacitor, a fourth capacitor and a transformer, wherein the third capacitor and the fourth capacitor are connected in series, one end of the third capacitor is connected with the phase line where the third capacitor is located, the other end of the third capacitor is connected with the fourth capacitor, one end of the fourth capacitor is connected with the third capacitor, the other end of the fourth capacitor is connected with the grounding end, two ends of the fourth capacitor are connected with the input end of the transformer, and the power output signal is obtained by measuring the output end of the transformer.
Preferably, the line sensor comprises an open line sensor and a feed-through line sensor;
the open type line sensor comprises a cake-shaped shell, wherein the cake-shaped shell is provided with a hollow circle center and a strip-shaped gap communicated with the hollow circle center, the strip-shaped gap forms an installation channel of a distribution line, the hollow circle center is used for accommodating the distribution line, the open type line sensor also comprises a plug, the plug comprises an arc-shaped cover and a strip-shaped bulge connected to the middle part of the arc-shaped cover, and the plug is used for sealing the strip-shaped gap after the distribution line is installed;
the feed-through line sensor comprises a round cake-shaped shell, wherein the round cake-shaped shell is provided with a hollow circle center, and the hollow circle center is used for accommodating a distribution line.
Preferably, the housing of the data collector is a waterproof sealed cabinet, and the housing is made of stainless steel metal or engineering plastics.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
in the technical scheme, the utility model provides a distribution lines smart measurement measuring device installs on built on stilts distribution lines, realizes smart measurement and measurement to the line behavior, has that the installation is convenient, high accuracy, high stability, multi-functional advantage, can wide application in distribution automation, ubiquitous electric power thing networking and smart power grids system.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent metering and measuring device for a distribution line provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of an internal circuit of a line sensor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an open type line sensor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a feedthrough line sensor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a data aggregator according to an embodiment of the present invention.
In the figure: 1-a line sensor; 2-a data collector, 101-a voltage transformer, 102-a current transformer, 103-a power-taking transformer, 104-a round cake-shaped shell, 105-a hollow circle center, 106-a strip-shaped gap, 107-a plug, 201-a power supply processing module, 202-an analog-to-digital conversion module, 203-a micro-processing module, 204-a storage module, 205-a satellite timing module, 206-a WIFI communication module and 207-a GPRS communication module.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model provides a distribution lines intelligent measurement measuring device, as shown in figure 1, the device includes three line sensor 1 of installing respectively on three phase lines (A, B, C) of distribution lines, data concentrator 2 of installing on the wire pole, and be used for fixed line sensor 1 and data concentrator 2's installation annex;
each line sensor 1 is connected with one end of the data collector 2 through a cable, the other end of the data collector 2 is connected with a ground terminal (earth), the line sensors 1 are used for measuring voltage output signals, current output signals and power output signals of a phase line where the line sensors are located and transmitting the voltage output signals, the current output signals and the power output signals to the data collector 2 through the cable, and the data collector 2 is used for collecting the voltage output signals and the current output signals and supplying power to the line sensors by using the power output signals.
The utility model provides a distribution lines smart measurement measuring device installs on built on stilts distribution lines, realizes smart measurement and measurement to the line behavior, and it is convenient to install and use, and measurement accuracy is high, and the function is diversified, can wide application in distribution automation, ubiquitous electric power thing networking and smart power grids system.
Further, as shown in fig. 2, the line sensor 1 includes a voltage transformer 101, a current transformer 102, and a power-taking transformer 103, where the voltage transformer 101 is used for measuring a voltage output signal, the current transformer 102 is used for measuring a current output signal, and the power-taking transformer 103 is used for measuring a power output signal.
Further, the voltage transformer 101 includes a first capacitor C1 and a second capacitor C2 connected in series, one end of the first capacitor C1 is connected to the phase line, the other end of the first capacitor C1 is connected to the second capacitor C2, one end of the second capacitor C2 is connected to the first capacitor C1, the other end of the second capacitor C2 is connected to ground (earth), and the voltage output signal V is outputvObtained by measuring the two ends of the second capacitance C2.
Wherein, the high-voltage capacitors C1 and C2 form a capacitance voltage-dividing type mutual inductor, and output signals VvConnected to the data aggregator 2 by a cable. When the voltage of the distribution line to the ground is 5.71kV, the output signal VvThe signal is 2V alternating current signal, can be transmitted to an AD conversion circuit for measurement, and simultaneously keeps good linearity and precision, and the conversion error is less than 0.5%.
Further, the current transformer 102 includes an iron core coil L electromagnetically inducted by the phase line, and a first resistor R1 and a second resistor R2 connected in series with the iron core coil L in sequence, the iron core coil L, the first resistor R1 and the second resistor R2 form a closed loop, and the current output signal V is outputiObtained by measuring the two ends of the first resistor R1.
Wherein, the electronic current transformer is composed of an iron core, a coil L wound on the iron core, and voltage dividing resistors R1 and R2, and outputs a signal ViConnected to the data aggregator 2 by a cable. When the load current of the distribution line is 630A, the signal V is outputiThe signal is 2V alternating current signal, can be transmitted to an AD conversion circuit for measurement, and simultaneously keeps good linearity and precision, and the conversion error is less than 0.5%.
Further, the power-taking transformer 103 comprises a third capacitor C3, a fourth capacitor C4 and a transformer T, wherein the third capacitor C3 and the fourth capacitor C4 are connected in series, one end of the third capacitor C3 is connected with the phase line where the third capacitor C3 is located, the other end of the third capacitor C3 is connected with the fourth capacitor C4, one end of the fourth capacitor C4 is connected with the third capacitor C3, the other end of the fourth capacitor C4 is connected with a ground terminal (earth), two ends of the fourth capacitor C4 are connected with an input end of the transformer T, and a power output signal u is obtained through an output end of the measuring transformer T.
The high-voltage capacitors C3 and C4 and the small transformer T form a power-taking mutual inductor, and the output signal u is connected to the data collector 2 through a cable. When the voltage of the distribution line to the ground is 5.71kV, the output power of the power taking mutual inductor is not less than 2W, and the data collector 2 can be supplied as a working power supply.
As a specific embodiment of the present invention, as shown in fig. 3 and 4, the line sensor of the present invention includes an open line sensor (fig. 3) and a feed-through line sensor (fig. 4);
the open type line sensor comprises a cake-shaped shell 104, wherein the cake-shaped shell 104 is provided with a hollow circle center 105 and a strip-shaped gap 106 communicated with the hollow circle center 105, the strip-shaped gap 106 forms an installation channel of a distribution line, the hollow circle center 105 is used for accommodating the distribution line, the open type line sensor also comprises a plug 107, the plug 107 comprises an arc-shaped cover and a strip-shaped bulge connected to the middle part of the arc-shaped cover, and the plug 107 is used for sealing the strip-shaped gap 106 after the distribution line is installed;
the feedthrough line sensor comprises a discoid housing 104, the discoid housing 104 having a hollow centre 105, the hollow centre 105 being adapted to receive the distribution wire. During installation, the distribution wire needs to penetrate through the hollow circle center 105 for installation.
The embodiment of the utility model provides an in the embodiment be an integrated intelligent sensor of innovation, have characteristics such as small, the integrated level is high, measurement accuracy is high, the installation is convenient. Wherein open type line sensor can install under the circumstances that the circuit does not have a power failure and use, it is one of the important advantages of the utility model.
Preferably, the housing of the data collector 2 in the embodiment of the present invention is a waterproof and sealed cabinet, and the material thereof is stainless steel metal or engineering plastic, etc. suitable for outdoor use.
The data collector 2 is communicated with three high-precision line sensors 1 arranged on the distribution line through connecting cables to obtain secondary measurement signals V of A, B, C three-phase distribution linev、ViAnd the working power supply u is used for carrying out data conversion on the secondary measurement signal and carrying out subsequent calculation and analysis.
Further, as shown in fig. 5, the data aggregator 2 includes:
the power supply processing module 201 is used for performing rectification, voltage stabilization and charging management on the power supply output signal to form a stable working power supply for all parts in the data collector 2;
the analog-to-digital conversion module 202 is used for performing analog-to-digital conversion on the voltage output signal and the current output signal and sending the converted data to the micro-processing module 203;
the micro-processing module 203 is used for analyzing and processing the converted data to obtain working parameters and working states of the distribution lines;
the storage module 204 is used for storing the analysis processing result of the micro-processing module 203 for subsequent calling and querying;
a satellite time setting module 205, configured to provide current time information and location information to the microprocessor 203;
the WIFI communication module 206 is used for communicating with a handheld device in a close range through a WIFI network, transmitting data and receiving instructions;
and a GPRS communication module 207 for communicating with a remote device, transmitting data and receiving instructions through a wireless public network communication service provided by an operator.
Specifically, the working power supply formed by the power supply processing module comprises 1.8V, 3.3V and 5V stable direct current working power supplies; the satellite timing module 105 comprises a GPS, a big dipper, or other satellite timing devices; the handheld devices comprise mobile phones, PADs, notebook computers and the like.
The analog-to-digital conversion module 202 converts the analog signal into a digital signal, obtains the waveforms of current and voltage, and transmits the digital signal to the micro processing module 203(MCU) through an internal data bus, and the micro processing module 203 is configured to analyze and process the converted data, and specifically includes:
calculating effective values, active power, reactive power, power factors, three-phase active power and reactive power of three-phase current and three-phase voltage;
judging short-circuit faults and ground faults;
and carrying out voltage qualification rate statistics, three-phase unbalance analysis, harmonic analysis and line loss analysis.
The micro-processing module 203 obtains the working parameters and the working state of the distribution line through the analysis processing process.
To sum up, the utility model provides a distribution lines intelligent measurement measuring device installs on built on stilts distribution lines, realizes intelligent measurement and the measurement to the line behavior, has that the installation is convenient, high accuracy, high stability, multi-functional advantage, can wide application in distribution automation, ubiquitous electric power thing networking and smart power grids system.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The intelligent metering and measuring device for the distribution line is characterized by comprising three line sensors, a data concentrator and a mounting accessory, wherein the three line sensors are respectively mounted on three phase lines of the distribution line;
each line sensor is connected with one end of the data concentrator through a cable, the other end of the data concentrator is connected with a ground terminal, the line sensors are used for measuring voltage output signals, current output signals and power output signals of the phase line where the line sensors are located and transmitting the voltage output signals, the current output signals and the power output signals to the data concentrator through the cable, and the data concentrator is used for collecting the voltage output signals and the current output signals and supplying power to the line sensors through the power output signals.
2. The distribution line smart metering measuring device of claim 1, wherein the line sensor comprises a voltage transformer, a current transformer, and a power transformer, the voltage transformer is configured to measure the voltage output signal, the current transformer is configured to measure the current output signal, and the power transformer is configured to measure the power output signal.
3. The distribution line intelligent metering and measuring device of claim 2, wherein the voltage transformer comprises a first capacitor and a second capacitor which are connected in series, one end of the first capacitor is connected with the phase line, the other end of the first capacitor is connected with the second capacitor, one end of the second capacitor is connected with the first capacitor, the other end of the second capacitor is connected with a grounding terminal, and the voltage output signal is obtained by measuring two ends of the second capacitor.
4. The distribution line intelligent metering and measuring device according to claim 2, wherein the current transformer comprises an iron core coil electromagnetically induced with the phase line, and a first resistor and a second resistor sequentially connected in series with the iron core coil, the first resistor and the second resistor form a closed loop, and the current output signal is obtained by measuring two ends of the first resistor.
5. The distribution line intelligent metering and measuring device of claim 2, wherein the electricity taking mutual inductor comprises a third capacitor, a fourth capacitor and a transformer, wherein the third capacitor and the fourth capacitor are connected in series, one end of the third capacitor is connected with the phase line, the other end of the third capacitor is connected with the fourth capacitor, one end of the fourth capacitor is connected with the third capacitor, the other end of the fourth capacitor is connected with a grounding end, two ends of the fourth capacitor are connected with the input end of the transformer, and the power output signal is obtained by measuring the output end of the transformer.
6. The distribution line smart metering measurement device of any one of claims 1-5, wherein the line sensors include open line sensors and through line sensors;
the open type line sensor comprises a cake-shaped shell, wherein the cake-shaped shell is provided with a hollow circle center and a strip-shaped gap communicated with the hollow circle center, the strip-shaped gap forms an installation channel of a distribution line, the hollow circle center is used for accommodating the distribution line, the open type line sensor also comprises a plug, the plug comprises an arc-shaped cover and a strip-shaped bulge connected to the middle part of the arc-shaped cover, and the plug is used for sealing the strip-shaped gap after the distribution line is installed;
the feed-through line sensor comprises a round cake-shaped shell, wherein the round cake-shaped shell is provided with a hollow circle center, and the hollow circle center is used for accommodating a distribution line.
7. The distribution line smart metering and measuring device according to any one of claims 1-5, wherein the housing of the data collector is a waterproof and sealed cabinet made of stainless steel metal or engineering plastic.
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| CN201921751660.8U CN211318615U (en) | 2019-10-18 | 2019-10-18 | Intelligent metering and measuring device for distribution line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110703023A (en) * | 2019-10-18 | 2020-01-17 | 清大智能（北京）科技有限公司 | Intelligent metering and measuring device for distribution line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110703023A (en) * | 2019-10-18 | 2020-01-17 | 清大智能（北京）科技有限公司 | Intelligent metering and measuring device for distribution line |
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