CN110954742A - Novel wireless voltage drop test method based on carrier communication - Google Patents
Novel wireless voltage drop test method based on carrier communication Download PDFInfo
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- CN110954742A CN110954742A CN201911146171.4A CN201911146171A CN110954742A CN 110954742 A CN110954742 A CN 110954742A CN 201911146171 A CN201911146171 A CN 201911146171A CN 110954742 A CN110954742 A CN 110954742A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A novel wireless voltage drop test method based on carrier communication is characterized in that a carrier communication technology is applied to secondary voltage drop test, and output signals of a PT side are transmitted to an electric energy meter side through the carrier communication technology so as to be calculated; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit. The invention has the advantages that: the cable has remarkable economic benefit, and accidents that the personal and equipment safety is endangered, such as equipment short circuit caused by cable abrasion and mistaken touch of electrified equipment possibly caused in the cable pulling process, are avoided. Avoid the major loss that the potential safety hazard of field personnel operation brought, be favorable to work efficiency and automatic level to improve.
Description
Technical Field
The invention relates to a novel wireless voltage drop test method based on carrier communication.
Background
The novel wireless voltage drop test technology based on carrier communication transmits specific difference and angular difference synchronous digital signals through tested secondary loop broadband carrier communication between a tester main part and a tester extension, does not need cabling, is not limited in communication distance, is not influenced by the surrounding environment, is high in test speed response and the like, and can well complete the measurement work in large-scale power plants and all levels of transformer substations.
Disclosure of Invention
The invention aims to solve the problems that the traditional wired secondary voltage drop test is time-consuming and labor-consuming, and the secondary voltage has interphase short circuit or potential safety hazard of earth discharge in the cable pulling test process; the problems that a wireless secondary voltage drop tester is easily interfered by an external strong magnetic field, potential maloperation hazards are protected, the measurement precision is high and the like are solved; the labor intensity of electric energy metering management personnel on the on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, and the major loss caused by the potential safety hazard of on-site personnel operation is avoided; the working efficiency and the automation level are greatly improved, and a novel wireless voltage drop test method based on carrier communication is particularly provided.
The invention provides a novel wireless voltage drop test method based on carrier communication, which is characterized by comprising the following steps: applying a carrier communication technology to a secondary voltage drop test, and transmitting an output signal of a PT side to an electric energy meter side through the carrier communication technology so as to calculate; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit.
According to the novel wireless voltage drop testing method based on carrier communication, the main circuit and the branch circuits of the tester are in broadband carrier communication through the tested secondary circuit, synchronous digital signals of specific difference and angular difference are transmitted, cables do not need to be laid, the communication distance is not limited, the influence of the surrounding environment is avoided, the testing speed is high in response, and the like, and the novel wireless voltage drop testing method based on carrier communication can well complete the measurement work in large-scale power plants and substations of various levels.
The application of the technology solves the potential safety hazards that the traditional wired secondary voltage drop test at present wastes time and labor, and secondary voltage has interphase short circuit or discharges to the ground in the cable pulling test process; the problems that the wireless secondary voltage drop tester is easily interfered by an external strong magnetic field, potential maloperation hazards are protected, the measurement precision is high and the like are solved; the labor intensity of electric energy metering management personnel on the on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, and the major loss caused by the potential safety hazard of on-site personnel operation is avoided; the working efficiency and the automation level are greatly improved.
Analog signal input circuit, analog signal acquisition circuit, auxiliary control circuit: the effect is as follows:
and the voltage at the tail end of the secondary side of the voltage transformer is subjected to voltage division, photoelectric isolation and multi-path analog switch processing and then is sent to an analog-digital conversion module for data processing.
The data processing circuit: and D/A conversion is carried out on the voltage at the tail end of the secondary side of the voltage transformer after the pretreatment, so that the voltage is converted into a digital signal for the main control circuit to calculate the voltage drop value.
The main control circuit: and calculating a secondary voltage drop value of a voltage transformer of the loop, and sending the secondary voltage drop value to the carrier wireless transmission circuit.
The carrier wireless transmission circuit comprises: and a data transmission channel between the main and the extension is established through the carrier wireless data transmission module.
The carrier voltage drop tester has the following frequency points: 1-2 million, carrier voltage drop tester amplitude: less than 5V.
The display circuit: and displaying measurement data such as voltage values, ratio differences, angle differences, voltage drops, synthesis errors and the like of each phase at two sides.
The power supply circuit comprises: and as a power supply system for the equipment.
The invention has the advantages that:
the novel wireless voltage drop test method based on carrier communication has obvious economic benefit, the voltage drop of the secondary circuit of the metering voltage transformer is an important component of the comprehensive error of the metering device, and the measurement result must be rigorous, accurate and reliable to ensure the fairness and justice of trade settlement between a power supply enterprise and an electric power customer. Compared with the traditional voltage drop testing technology, the novel wireless voltage drop testing technology based on carrier communication completely avoids accidents that personal and equipment safety are endangered, such as equipment short circuit caused by cable abrasion and mistaken touch of electrified equipment possibly caused in a wire pulling process. Meanwhile, the working efficiency is greatly improved, the working strength of workers is reduced, and the method has great popularization value and application significance.
The novel wireless voltage drop tester based on carrier communication transmits specific difference and angular difference synchronous digital signals through tested secondary loop broadband carrier communication between a main part and an extension part, does not need to lay cables, has the characteristics of unlimited communication distance, high testing speed response and the like, and can well complete the measurement work in large-scale power plants and all levels of transformer substations. The mode well solves the problems that the traditional wired secondary voltage drop tester wastes time and labor, secondary voltage has potential safety hazards of interphase short circuit or earth discharge in the process of pulling and testing a cable conductor, and the wireless secondary voltage drop tester is easy to be interfered by an external strong magnetic field, protects potential misoperation, measures the precision and the like; the labor intensity of electric energy metering management personnel on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, the major loss caused by potential safety hazards of on-site personnel operation is avoided, and the work efficiency and the automation level are greatly improved.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a block diagram of field testing;
fig. 2 is a schematic block diagram.
Detailed Description
Example 1
The invention provides a novel wireless voltage drop test method based on carrier communication, which is characterized by comprising the following steps: applying a carrier communication technology to a secondary voltage drop test, and transmitting an output signal of a PT side to an electric energy meter side through the carrier communication technology so as to calculate; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit.
According to the novel wireless voltage drop testing method based on carrier communication, the main circuit and the branch circuits of the tester are in broadband carrier communication through the tested secondary circuit, synchronous digital signals of specific difference and angular difference are transmitted, cables do not need to be laid, the communication distance is not limited, the influence of the surrounding environment is avoided, the testing speed is high in response, and the like, and the novel wireless voltage drop testing method based on carrier communication can well complete the measurement work in large-scale power plants and substations of various levels.
The application of the technology solves the potential safety hazards that the traditional wired secondary voltage drop test at present wastes time and labor, and secondary voltage has interphase short circuit or discharges to the ground in the cable pulling test process; the problems that the wireless secondary voltage drop tester is easily interfered by an external strong magnetic field, potential maloperation hazards are protected, the measurement precision is high and the like are solved; the labor intensity of electric energy metering management personnel on the on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, and the major loss caused by the potential safety hazard of on-site personnel operation is avoided; the working efficiency and the automation level are greatly improved.
Analog signal input circuit, analog signal acquisition circuit, auxiliary control circuit: the effect is as follows:
and the voltage at the tail end of the secondary side of the voltage transformer is subjected to voltage division, photoelectric isolation and multi-path analog switch processing and then is sent to an analog-digital conversion module for data processing.
The data processing circuit: and D/A conversion is carried out on the voltage at the tail end of the secondary side of the voltage transformer after the pretreatment, so that the voltage is converted into a digital signal for the main control circuit to calculate the voltage drop value.
The main control circuit: and calculating a secondary voltage drop value of a voltage transformer of the loop, and sending the secondary voltage drop value to the carrier wireless transmission circuit.
The carrier wireless transmission circuit comprises: and a data transmission channel between the main and the extension is established through the carrier wireless data transmission module.
The carrier voltage drop tester has the following frequency points: 1-2 million, carrier voltage drop tester amplitude: less than 5V.
The display circuit: and displaying measurement data such as voltage values, ratio differences, angle differences, voltage drops, synthesis errors and the like of each phase at two sides.
The power supply circuit comprises: and as a power supply system for the equipment.
Example 2
The invention provides a novel wireless voltage drop test method based on carrier communication, which is characterized by comprising the following steps: applying a carrier communication technology to a secondary voltage drop test, and transmitting an output signal of a PT side to an electric energy meter side through the carrier communication technology so as to calculate; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit.
According to the novel wireless voltage drop testing method based on carrier communication, the main circuit and the branch circuits of the tester are in broadband carrier communication through the tested secondary circuit, synchronous digital signals of specific difference and angular difference are transmitted, cables do not need to be laid, the communication distance is not limited, the influence of the surrounding environment is avoided, the testing speed is high in response, and the like, and the novel wireless voltage drop testing method based on carrier communication can well complete the measurement work in large-scale power plants and substations of various levels.
The application of the technology solves the potential safety hazards that the traditional wired secondary voltage drop test at present wastes time and labor, and secondary voltage has interphase short circuit or discharges to the ground in the cable pulling test process; the problems that the wireless secondary voltage drop tester is easily interfered by an external strong magnetic field, potential maloperation hazards are protected, the measurement precision is high and the like are solved; the labor intensity of electric energy metering management personnel on the on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, and the major loss caused by the potential safety hazard of on-site personnel operation is avoided; the working efficiency and the automation level are greatly improved.
Analog signal input circuit, analog signal acquisition circuit, auxiliary control circuit: the effect is as follows:
and the voltage at the tail end of the secondary side of the voltage transformer is subjected to voltage division, photoelectric isolation and multi-path analog switch processing and then is sent to an analog-digital conversion module for data processing.
The data processing circuit: and D/A conversion is carried out on the voltage at the tail end of the secondary side of the voltage transformer after the pretreatment, so that the voltage is converted into a digital signal for the main control circuit to calculate the voltage drop value.
The main control circuit: and calculating a secondary voltage drop value of a voltage transformer of the loop, and sending the secondary voltage drop value to the carrier wireless transmission circuit.
The carrier wireless transmission circuit comprises: and a data transmission channel between the main and the extension is established through the carrier wireless data transmission module.
The carrier voltage drop tester has the following frequency points: 1-2 million, carrier voltage drop tester amplitude: less than 5V.
Example 3
The invention provides a novel wireless voltage drop test method based on carrier communication, which is characterized by comprising the following steps: applying a carrier communication technology to a secondary voltage drop test, and transmitting an output signal of a PT side to an electric energy meter side through the carrier communication technology so as to calculate; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit.
According to the novel wireless voltage drop testing method based on carrier communication, the main circuit and the branch circuits of the tester are in broadband carrier communication through the tested secondary circuit, synchronous digital signals of specific difference and angular difference are transmitted, cables do not need to be laid, the communication distance is not limited, the influence of the surrounding environment is avoided, the testing speed is high in response, and the like, and the novel wireless voltage drop testing method based on carrier communication can well complete the measurement work in large-scale power plants and substations of various levels.
The application of the technology solves the potential safety hazards that the traditional wired secondary voltage drop test at present wastes time and labor, and secondary voltage has interphase short circuit or discharges to the ground in the cable pulling test process; the problems that the wireless secondary voltage drop tester is easily interfered by an external strong magnetic field, potential maloperation hazards are protected, the measurement precision is high and the like are solved; the labor intensity of electric energy metering management personnel on the on-site measurement wire pulling work is reduced, the cost of enterprise operation management is reduced, and the major loss caused by the potential safety hazard of on-site personnel operation is avoided; the working efficiency and the automation level are greatly improved.
Analog signal input circuit, analog signal acquisition circuit, auxiliary control circuit: the effect is as follows:
and the voltage at the tail end of the secondary side of the voltage transformer is subjected to voltage division, photoelectric isolation and multi-path analog switch processing and then is sent to an analog-digital conversion module for data processing.
The data processing circuit: and D/A conversion is carried out on the voltage at the tail end of the secondary side of the voltage transformer after the pretreatment, so that the voltage is converted into a digital signal for the main control circuit to calculate the voltage drop value.
The main control circuit: and calculating a secondary voltage drop value of a voltage transformer of the loop, and sending the secondary voltage drop value to the carrier wireless transmission circuit.
Claims (10)
1. A novel wireless voltage drop test method based on carrier communication is characterized in that: applying a carrier communication technology to a secondary voltage drop test, and transmitting an output signal of a PT side to an electric energy meter side through the carrier communication technology so as to calculate; the main machine is arranged at the meter side, the branch machine is arranged at the PT side, and the main machine and the branch machine only need to sample voltage values at two sides; the system comprises an analog signal input circuit, an analog signal acquisition circuit, an auxiliary control circuit, a data processing circuit, a main control circuit, a carrier wireless transmission circuit, a display circuit and a power supply circuit.
2. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: according to the novel wireless voltage drop testing method based on carrier communication, the main circuit and the branch circuits of the tester are in broadband carrier communication through the tested secondary circuit, synchronous digital signals of specific difference and angular difference are transmitted, cables do not need to be laid, the communication distance is not limited, the influence of the surrounding environment is avoided, the testing speed is high in response, and the like, and the novel wireless voltage drop testing method based on carrier communication can well complete the measurement work in large-scale power plants and substations of various levels.
3. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: analog signal input circuit, analog signal acquisition circuit, auxiliary control circuit: the effect is as follows:
and the voltage at the tail end of the secondary side of the voltage transformer is subjected to voltage division, photoelectric isolation and multi-path analog switch processing and then is sent to an analog-digital conversion module for data processing.
4. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: and the measured data is subjected to synchronous interactive transmission of data by the carrier module through the PT secondary cable.
5. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the data processing circuit: and D/A conversion is carried out on the voltage at the tail end of the secondary side of the voltage transformer after the pretreatment, so that the voltage is converted into a digital signal for the main control circuit to calculate the voltage drop value.
6. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the main control circuit: and calculating a secondary voltage drop value of a voltage transformer of the loop, and sending the secondary voltage drop value to the carrier wireless transmission circuit.
7. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the carrier wireless transmission circuit comprises: and a data transmission channel between the main and the extension is established through the carrier wireless data transmission module.
8. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the carrier voltage drop tester has the following frequency points: 1-2 million, carrier voltage drop tester amplitude: less than 5V.
9. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the display circuit: and displaying measurement data such as voltage values, ratio differences, angle differences, voltage drops, synthesis errors and the like of each phase at two sides.
10. The novel wireless voltage drop test method based on carrier communication according to claim 1, characterized in that: the power supply circuit comprises: and as a power supply system for the equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766931A (en) * | 2020-06-28 | 2020-10-13 | 沈阳金凯瑞科技有限公司 | Efficiency tester for oil pumping well system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111766931A (en) * | 2020-06-28 | 2020-10-13 | 沈阳金凯瑞科技有限公司 | Efficiency tester for oil pumping well system |
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Application publication date: 20200403 |