CN103065442A - Voltage monitoring system based on transformer station area phase sequence identification - Google Patents

Voltage monitoring system based on transformer station area phase sequence identification Download PDF

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CN103065442A
CN103065442A CN2012105895593A CN201210589559A CN103065442A CN 103065442 A CN103065442 A CN 103065442A CN 2012105895593 A CN2012105895593 A CN 2012105895593A CN 201210589559 A CN201210589559 A CN 201210589559A CN 103065442 A CN103065442 A CN 103065442A
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voltage monitoring
main frame
phase
line
signal
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CN2012105895593A
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CN103065442B (en
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朱晓鹰
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镇江长河电力技术有限公司
甘肃省电力公司平凉供电公司
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Abstract

The invention relates to a voltage monitoring system which comprises a main machine and voltage monitors, wherein the main machine is connected with the head ends of three phases of power lines and is used for detecting the head end phase voltage values of the three phases of power lines; the voltage monitors are respectively connected with the tail ends of the three phases of power lines. The main machine comprises a wireless communication device suitable for sending wireless signals of the current head end phase voltage values of the three phases of power lines to all the voltage monitors; the voltage monitors are used for calculating the impedance value of a connected power line according to the current tail end phase voltage value of the tail end of the detected connected power line and the current head end phase voltage values and sending a signal containing the impedance value and the address code information of the voltage monitors to the main machine; the main machine generates a corresponding phase sequence code according to the received address code information in the signal and carries out corresponding carrier wave modulation according to the impedance value to generate and send first carrier wave signals to the corresponding voltage monitors; and the voltage monitors are used for judging the phase sequence of the connected power line according to the received phase sequence code.

Description

A kind of voltage monitoring system based on the identification of transformer platform area phase sequence
Technical field
The present invention relates to a kind of energy monitoring apparatus, particularly a kind of voltage monitoring system based on the identification of transformer platform area phase sequence.
Background technology
Power distribution network low-voltage customer terminal voltage quality is one of subject matter of low-voltage network always, rapid growth along with load, vast rural area, even the urban zone because of supply line head, transformer capacity is little, electrical network is aging etc., and reason causes the problems such as line drop is excessive, current supply loss is large, local serious regional terminal voltage only is tens volts, cause user's consumer normally not use, seriously affected resident's life.
For realizing circuit modification, analysis causes the definite reason of this kind phenomenon, traditional way has two kinds, first method is by power supply station's personnel, common situation is regularly to be used the voltage data of each bar circuit head and end of multimeter survey record by the personnel of power supply station, and the voltage data analysis by to record draws the line voltage distribution pressure drop, this method can not detect the phase sequence of voltage, and the voltage drop of namely measuring can't judge it is the voltage of which phase; Second method is that traditional voltage monitoring system is installed, the voltage of monitoring feeder ear and user side, but each voltage monitoring system the phase sequence situation is is poorly appraised and decided, this just can't determine that this voltage monitoring system is to belong to which phase supply line, also just can't calculate the voltage drop of each phase supply line.
Said method all can't accurately be judged voltage phase sequence, so can not analyze the voltage drop rule that produces and the impact that causes.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of voltage monitoring system that is applicable to the identification of transformer platform area phase sequence, this system can accurately calculate the voltage phase sequence of an arbitrary phase circuit in A under the transformer platform area, B, the C three-phase, is convenient to this phase sequence pressure drop of follow-up measurement.
The invention provides a kind of voltage monitoring system, comprising: be connected in the head end of three-phase power line, for detection of the main frame of the head end phase voltage value of each phase line of electric force, be connected to the voltage monitoring instrument of each phase line of electric force end; Described main frame comprises a wireless communication apparatus, is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument; Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described current head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame, every phase phase voltage is all identical because the transformer output terminal is first section of three-phase power line, so need not to distinguish that phase voltage value of head end; Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value, is sent to corresponding voltage monitoring instrument to generate the first carrier signal; Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
Described voltage monitoring system sends corresponding phase sequence coding by each phase line of electric force.
Described voltage monitoring instrument comprises the respective wireless signal that wireless communication module sends with Receiving Host.
Because the time compole of wireless and wire transmission is short, so main frame and voltage monitoring instrument employed head end, terminal phase voltage when calculating pressure drop can be regarded the phase voltage value of synchronization as.
Further, described signal transfers to described main frame by line of electric force, and wherein, described voltage monitoring instrument is according to described resistance value modulation corresponding carriers signal, and this carrier signal is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by the line of electric force of corresponding phase.
Further, described voltage monitoring instrument comprises wireless submodule, and wherein, described signal is by being wirelessly transmitted to described main frame, and this wireless signal transmission is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by described wireless communication apparatus.
Further, described voltage monitoring instrument comprises: be suitable for by pressure drop to calculate the terminal MCU submodule of described resistance value, be suitable for according to the terminal modulation-demodulation circuit of described resistance value with the multicarrier FSK modulation of adjusting, the terminal commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described terminal modulation-demodulation circuit; What link to each other with described terminal commutation circuit is suitable for according to the terminal coupling mechanism of described resistance value with the adjusting coupling parameter, and described terminal MCU module links to each other with described terminal modulation-demodulation circuit, terminal commutation circuit, terminal coupling mechanism respectively with synchro control corresponding carriers signal modulation output; Comprise also in the described carrier signal that sub-clustering encodes to record each nodes of line of electric force in the transmission course.
Further, described main frame comprises: main frame MCU submodule, and after it received the carrier signal that described voltage monitoring instrument sends, each nodes of described line of electric force of recording according to described carrier signal was to arrange the respective nodes number of frequency hopping;
Be suitable for the main frame modulation-demodulation circuit that carrier frequency is set and described respective nodes number is set according to described resistance value, the main frame commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described main frame modulation-demodulation circuit; Link to each other with described main frame commutation circuit respectively with the coupling of each phase line of electric force be suitable for nodes according to described resistance value and frequency hopping to regulate the main frame coupling mechanism of coupling parameter; Described main frame MCU submodule links to each other with described main frame modulation-demodulation circuit, main frame commutation circuit, each main frame coupling mechanism respectively and inputs or outputs with the modulation of synchro control corresponding carriers signal.
In order to address the above problem, the present invention also provides a kind of method of work of voltage monitoring system, and the method for work on the basis of above-mentioned voltage monitoring system comprises:
Described main frame is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument;
Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame;
Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value, is sent to corresponding voltage monitoring instrument to generate the first carrier signal;
Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
Compared with prior art, the present invention has following advantage: (1) the circuit first and end voltage that can monitor low voltage electric network of the present invention, in time send the relevant voltage value by wireless communication apparatus, and can accurately calculate the impedance of each mutually every circuit; (2) address code information of corresponding resistance value and this voltage monitoring instrument is sent to main frame, main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carry out corresponding carriers according to described resistance value and modulate, make the voltage monitoring instrument that is positioned at terminal can accurately receive the carrier signal that main frame sends, and can accurately find the voltage monitoring instrument that is in monitoring state that is positioned at the line of electric force end with address code information in the described phase sequence coding; This mode also can accurately determine the phase sequence of relevant voltage monitor when a plurality of voltage monitoring instruments detect simultaneously simultaneously; (3) described voltage monitoring instrument transmission carrier signal can also be encoded by sub-clustering, with each nodes of line of electric force in the record transmission course, so that adopt the frequency hopping modulation during carrier signal modulation of main frame when sending the phase sequence coding, the nodes of the line of electric force that the carrier signal that respective nodes number and the main frame of described frequency modulation receives is recorded is corresponding; The carrier signal that described main frame is sent arrives corresponding voltage monitoring instrument more accurately.
For solving the problems of the technologies described above, the present invention also provides another kind of voltage monitoring system, comprising: be connected in the main frame of the head end of three-phase power line, be connected to several voltage monitoring instruments of the end of each phase line of electric force; Each voltage monitoring instrument is suitable for sending the signal of address code information of relevant voltage monitor to described main frame by line of electric force, described voltage monitoring instrument comprises a wireless communication module, is suitable for signal by the same address code information of wireless transmission to described main frame; Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence; Described main frame comprises a wireless communication apparatus, is suitable for sending the described phase sequence of recording to the relevant voltage monitor.
Further, for the ease of carrying out phase sequence when test at the multivoltage monitor, described main frame can also carry out accurately wireless transmission to send corresponding phase sequence; Each voltage monitoring instrument sends wireless or by in the signal of line of electric force transmission respectively with separately identification code, the phase sequence information and each voltage monitoring instrument that are suitable for the main frame wireless transmission are complementary.
Further, in order to improve the ability to communicate of the wire signal that described voltage monitoring instrument sends, described voltage monitoring instrument also be suitable for according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and carry out corresponding carriers according to this resistance value and modulate the generation carrier signal, be sent to main frame by line of electric force.
In order to address the above problem, the present invention also provides the method for work on the basis of above-mentioned voltage monitoring system, comprising:
The signal of address code information that each voltage monitoring instrument is suitable for sending the relevant voltage monitor by line of electric force is to described main frame, and the signal of described voltage monitoring instrument by the same address code information of wireless transmission is to described main frame;
Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence;
Described main frame is suitable for sending the described phase sequence of recording to the relevant voltage monitor.
Compared with prior art, this another technical scheme has following advantage: the wireless and wire signal that each phase sequence of (1) transformer sends by voltage monitoring instrument just can be finished the coupling of phase sequence, circuit structure is simple, effectively reduces the construction cost of system, has reduced the work load of main frame.(2) identification code that adds simultaneously can be on the simultaneously-measured basis of multivoltage detector, and wireless signal is not misinformated, and makes the measurement of phase sequence accurate.
Description of drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 syndeton synoptic diagram that is applicable to the voltage monitoring system of transformer platform area phase sequence identification of the present invention;
Structure and the connection diagram of Fig. 2 main frame of the present invention and voltage monitoring instrument.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
Embodiment 1
See Fig. 1, a kind of voltage monitoring system comprises: be connected in the head end of three-phase power line, for detection of the main frame of the head end phase voltage value of each phase line of electric force, be connected to several voltage monitoring instruments of each phase line of electric force end; Described main frame comprises a wireless communication apparatus, is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument; Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described current head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame; Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value, is sent to corresponding voltage monitoring instrument to generate the first carrier signal; Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
Described voltage monitoring instrument also can be called the voltage monitoring module.
Described signal transfers to described main frame by line of electric force, and wherein, described voltage monitoring instrument is according to described resistance value modulation corresponding carriers signal, and this carrier signal is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by the line of electric force of corresponding phase.
Described voltage monitoring instrument comprises wireless submodule, and wherein, described signal is by being wirelessly transmitted to described main frame, and this wireless signal transmission is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by described wireless communication apparatus.
See Fig. 2, described voltage monitoring instrument comprises: be suitable for by pressure drop to calculate the terminal MCU submodule of described resistance value, be suitable for according to the terminal modulation-demodulation circuit of described resistance value with the multicarrier FSK modulation of adjusting, the terminal commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described terminal modulation-demodulation circuit; What link to each other with described terminal commutation circuit is suitable for according to the terminal coupling mechanism of described resistance value with the adjusting coupling parameter, and described terminal MCU module links to each other with described terminal modulation-demodulation circuit, terminal commutation circuit, terminal coupling mechanism respectively with synchro control corresponding carriers signal modulation output; Comprise also in the described carrier signal that sub-clustering encodes to record each nodes of line of electric force in the transmission course.
Described main frame comprises: main frame MCU submodule, and after it received the carrier signal that described voltage monitoring instrument sends, each nodes of described line of electric force of recording according to described carrier signal was to arrange the respective nodes number of frequency hopping; Be suitable for the main frame modulation-demodulation circuit that carrier frequency is set and described respective nodes number is set according to described resistance value, the main frame commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described main frame modulation-demodulation circuit; Link to each other with described main frame commutation circuit respectively with the coupling of each phase line of electric force be suitable for nodes according to described resistance value and frequency hopping to regulate the main frame coupling mechanism of coupling parameter; Described main frame MCU submodule links to each other with described main frame modulation-demodulation circuit, main frame commutation circuit, each main frame coupling mechanism respectively and inputs or outputs with the modulation of synchro control corresponding carriers signal.
Voltage monitoring system of the present invention sends the phase sequence coded signal in three-phase power line, this phase sequence coded signal sends the corresponding carriers signal after modulating through frequency hopping, after each voltage monitoring instrument endways receives corresponding corresponding carriers signal, can judge the corresponding phase sequence of each line of electric force.
Embodiment 2
See Fig. 1, the method for work of the described voltage monitoring system on embodiment 1 basis comprises:
Described main frame is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument;
Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame;
Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value, is sent to corresponding voltage monitoring instrument to generate the first carrier signal;
Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
Embodiment 3
See Fig. 1, a kind of voltage monitoring system comprises: be connected in the main frame of the head end of three-phase power line, be connected to several voltage monitoring instruments of the end of each phase line of electric force; Each voltage monitoring instrument is suitable for sending the signal of address code information of relevant voltage monitor to described main frame by line of electric force, described voltage monitoring instrument comprises a wireless communication module, is suitable for signal by the same address code information of wireless transmission to described main frame; Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence; Described main frame comprises a wireless communication apparatus, is suitable for sending the described phase sequence of recording to the relevant voltage monitor.(wherein, wireless communication module and wireless communication apparatus do not draw)
Each voltage monitoring instrument sends wireless or by in the signal of line of electric force transmission respectively with separately identification code, the phase sequence information and each voltage monitoring instrument that are suitable for the main frame wireless transmission are complementary.
Described voltage monitoring instrument also be suitable for according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and carry out corresponding carriers according to this resistance value and modulate the generation carrier signal, be sent to main frame by line of electric force.
Embodiment 4
See Fig. 1, the method for work of the described voltage monitoring system on embodiment 3 bases comprises:
The signal of address code information that each voltage monitoring instrument is suitable for sending the relevant voltage monitor by line of electric force is to described main frame, and the signal of described voltage monitoring instrument by the same address code information of wireless transmission is to described main frame;
Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence;
Described main frame is suitable for sending the described phase sequence of recording to the relevant voltage monitor.
Wherein, wireless communication module and wireless communication apparatus do not draw.
Voltage monitoring instrument can insert the phase sequence that detects this socket in the socket, concrete method of work is: voltage monitoring instrument inserts behind the socket by wireless and wiredly send respectively same address code information, for example 0001, main frame receive wireless and three-phase line in address code information, if be 0001 from the A address code information of receiving of joining in the three-phase line, then with wireless receiving to address code information 0001 be complementary, then record the A phase sequence, and this phase sequence is sent to described voltage monitoring instrument, after described voltage monitoring instrument receives phase sequence information, and phase sequence information is presented on the liquid crystal display, operating personnel just can read phase sequence A.
When having a plurality of voltage monitoring instruments to work simultaneously, then add identification code, namely in address code information, add identification code, for example 00010010, wherein, 0001 is geocoding, and 0010 is the identification code of this voltage monitoring instrument, during main frame wireless transmission phase sequence, the voltage monitoring instrument that only has this identification code could receive the phase sequence information of this wireless transmission, other voltage monitoring instruments can't receive, and that is to say, each voltage monitoring instrument can only receive corresponding wireless signal.
Obviously, above-described embodiment only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.

Claims (10)

1. voltage monitoring system is characterized in that comprising: be connected in the head end of three-phase power line, for detection of the main frame of the head end phase voltage value of each phase line of electric force, be connected to the voltage monitoring instrument of the end of each phase line of electric force;
Described main frame comprises a wireless communication apparatus, is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument;
Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described current head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame;
Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value and generate the first carrier signal and be sent to corresponding voltage monitoring instrument;
Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
2. voltage monitoring system according to claim 1, it is characterized in that, described signal transfers to described main frame by line of electric force, wherein, described voltage monitoring instrument is according to described resistance value modulation corresponding carriers signal, and this carrier signal is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by the line of electric force of corresponding phase.
3. voltage monitoring system according to claim 1, it is characterized in that described voltage monitoring instrument comprises wireless submodule, wherein, described signal is by being wirelessly transmitted to described main frame, and this wireless signal transmission is with the address code information of this resistance value and this voltage monitoring instrument; Described first carrier signal is sent to corresponding voltage monitoring instrument by described wireless communication apparatus.
4. voltage monitoring system according to claim 2, it is characterized in that, described voltage monitoring instrument comprises: be suitable for by pressure drop to calculate the terminal MCU submodule of described resistance value, be suitable for according to the terminal modulation-demodulation circuit of described resistance value with the multicarrier FSK modulation of adjusting, the terminal commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described terminal modulation-demodulation circuit; What link to each other with described terminal commutation circuit is suitable for according to the terminal coupling mechanism of described resistance value with the adjusting coupling parameter, and described terminal MCU submodule links to each other with described terminal modulation-demodulation circuit, terminal commutation circuit, terminal coupling mechanism respectively with synchro control corresponding carriers signal modulation output; Also comprise the sub-clustering coding in the described carrier signal, with each nodes of line of electric force in the record transmission course.
5. voltage monitoring system according to claim 4 is characterized in that, described main frame comprises:
Main frame MCU submodule, after it received the carrier signal that described voltage monitoring instrument sends, each nodes of described line of electric force of recording according to described carrier signal was to arrange the respective nodes number of frequency hopping;
Be suitable for the main frame modulation-demodulation circuit that carrier frequency is set and described respective nodes number is set according to described resistance value, the main frame commutation circuit that is suitable for sending or accepting carrier wave that links to each other with described main frame modulation-demodulation circuit; Link to each other with described main frame commutation circuit respectively with the coupling of each phase line of electric force be suitable for nodes according to described resistance value and frequency hopping to regulate the main frame coupling mechanism of coupling parameter; Described main frame MCU submodule links to each other with described main frame modulation-demodulation circuit, main frame commutation circuit, each main frame coupling mechanism respectively and inputs or outputs with the modulation of synchro control corresponding carriers signal.
6. the method for work of voltage monitoring system according to claim 5 comprises:
Described main frame is suitable for sending the wireless signal of current head end phase voltage value of described three-phase power line to each voltage monitoring instrument;
Each voltage monitoring instrument respectively according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and send signal with the address code information of this resistance value and this voltage monitoring instrument to described main frame;
Described main frame generates corresponding phase sequence coding according to the address code information that receives in the described signal, and carries out the corresponding carriers modulation according to described resistance value, is sent to corresponding voltage monitoring instrument to generate the first carrier signal;
Described voltage monitoring instrument encodes to judge the phase sequence of the line of electric force that connects according to the described phase sequence that receives.
7. a voltage monitoring system is characterized in that comprising: be connected in the main frame of the head end of three-phase power line, be connected to several voltage monitoring instruments of the end of each phase line of electric force;
Each voltage monitoring instrument is suitable for sending the signal of address code information of relevant voltage monitor to described main frame by line of electric force, described voltage monitoring instrument comprises a wireless communication module, is suitable for signal by the same address code information of wireless transmission to described main frame;
Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence;
Described main frame comprises a wireless communication apparatus, is suitable for sending the described phase sequence of recording to the relevant voltage monitor.
8. voltage monitoring system according to claim 7, it is characterized in that comprising: each voltage monitoring instrument sends wireless or by in the signal of line of electric force transmission respectively with separately identification code, the phase sequence information and each voltage monitoring instrument that are suitable for the main frame wireless transmission are complementary.
9. according to claim 7 or 8 described voltage monitoring systems, it is characterized in that comprising: described voltage monitoring instrument also be suitable for according to current detection to terminal phase voltage value and the described head end phase voltage value of the line of electric force that connects calculate the resistance value that this institute connects line of electric force, and carry out corresponding carriers according to this resistance value and modulate the generation carrier signal, be sent to main frame by line of electric force.
10. the method for work of voltage monitoring system according to claim 9 comprises
The signal of address code information that each voltage monitoring instrument is suitable for sending the relevant voltage monitor by line of electric force is to described main frame, and the signal of described voltage monitoring instrument by the same address code information of wireless transmission is to described main frame;
Described main frame receives the address code information of described wireless transmission, and gather the signal of the address code information in each phase line of electric force, wherein, if the address code information of the line of electric force of the address code information of wireless transmission and phase transmission is complementary, then record this phase sequence;
Described main frame is suitable for the described phase sequence of recording of wireless transmission to the relevant voltage monitor.
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CN106597133A (en) * 2016-12-15 2017-04-26 福州大学 Method and device for recognition and identification of low-voltage power grid single-phase line phase sequence
CN106597133B (en) * 2016-12-15 2019-05-10 福州大学 A kind of low voltage electric network uniline phase sequence method for identifying and classifying and device
CN106788602A (en) * 2016-12-29 2017-05-31 国网浙江余姚市供电公司 A kind of ammeter circuit determines method and device
CN109164307A (en) * 2018-09-13 2019-01-08 南昌科晨电力试验研究有限公司 A kind of distribution transformer phase sequence recognizer
CN109164307B (en) * 2018-09-13 2020-07-07 南昌科晨电力试验研究有限公司 Phase sequence identification algorithm for distribution transformer

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