CN110187232B - Intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of low-voltage transformer area - Google Patents
Intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of low-voltage transformer area Download PDFInfo
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- CN110187232B CN110187232B CN201910379393.4A CN201910379393A CN110187232B CN 110187232 B CN110187232 B CN 110187232B CN 201910379393 A CN201910379393 A CN 201910379393A CN 110187232 B CN110187232 B CN 110187232B
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The embodiment of the invention discloses an intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage distribution area, which comprises a plurality of branch switches used in each hierarchical circuit of a power supply network of the low-voltage distribution area, wherein each branch switch adopts a non-intelligent switch, each hierarchical circuit is additionally provided with an intelligent monitoring unit, each intelligent monitoring unit comprises a low-voltage power line broadband carrier communication module used for realizing a data remote communication transmission function, a current transformer used for monitoring the on-off state, a high-speed data acquisition system used for detecting line faults and a metering chip used for realizing a metering function, the real-time monitoring of the power supply network of the low-voltage distribution area can be realized, the low-voltage power line broadband carrier communication is adopted, the remote communication can be completed without wiring, and the wiring construction difficulty of field communication is greatly reduced; meanwhile, the communication rate is far greater than that of the traditional RS485, micropower wireless and narrow-band carrier, and the high-speed acquisition requirement of real-time monitoring data of a power supply network of a transformer area is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of power monitoring equipment, in particular to an intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage transformer area.
Background
The low-voltage transformer area is used as the tail end of a power grid, and has the reasons of more running equipment, wide distribution, complex power supply environment, low automation level and the like, so that a plurality of transformer areas are in monitoring blind areas. When power failure occurs, due to lack of real-time monitoring on the running state of the equipment, the power failure cannot be actively reported, the power failure reason cannot be remotely diagnosed, the faulty equipment cannot be positioned, and the first-aid repair efficiency is seriously influenced.
Most of branch switches of the low-voltage power supply network are non-intelligent switches, and have no real-time monitoring and remote communication functions, so that the on-off state and the operation data such as voltage, current, power, electric quantity and the like cannot be remotely acquired.
At present, the main methods for intelligently transforming the low-voltage transformer area comprise: firstly, replacing a non-intelligent switch with an intelligent switch; and secondly, a low-voltage shunt monitoring unit is additionally arranged on the branch line.
(1) The intelligence switch possesses on-off state monitoring, voltage, current measurement and remote communication function, nevertheless adopts RS485 and joins in marriage the terminal and communicate, and the site operation wiring difficulty, the main problem lies in: the distribution transformer terminal is arranged on a low-voltage side of the transformer to be led out, and the branch switches of each stage are arranged on an incoming line cabinet, a feeder line cabinet, a branch box and a meter box of a power distribution room, wherein the branch box is far away from the power distribution room, and the meter box is generally distributed on a floor of a user; and the intelligent switch does not have the function of electric energy metering and cannot calculate the loss of each branch line.
(2) The low-voltage shunt monitoring unit has the functions of measuring the voltage and the current of the line and detecting the line fault, and the communication interface also adopts RS485, so that the problem of field construction wiring is also faced; the electric energy metering function is not provided, and the switch state cannot be monitored.
Disclosure of Invention
Therefore, the embodiment of the invention provides an intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage transformer area, which adopts low-voltage power line broadband carrier communication to solve the problems of high communication wiring construction difficulty, difficult communication, no electric energy metering and switch state monitoring.
In order to achieve the above object, an embodiment of the present invention provides the following:
an intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage transformer area comprises a plurality of branch switches used in each grading circuit of a power supply network of the low-voltage transformer area, wherein each branch switch adopts a non-intelligent switch, an intelligent monitoring unit is additionally arranged on each grading circuit, each intelligent monitoring unit comprises a low-voltage power line broadband carrier communication module used for realizing a data remote communication transmission function, a current transformer used for monitoring a switch state, a high-speed data acquisition system used for detecting a line fault and a metering chip used for realizing a metering function, the output end of the low-voltage power line broadband carrier communication module is electrically connected with the metering chip, and the input end of the low-voltage power line broadband carrier communication module is electrically connected with the current transformer and the high-speed data acquisition system respectively;
the low-voltage power line broadband carrier communication module is also used for realizing the functions of clock synchronization and active reporting of abnormal events;
the current transformer judges the state of the branch switch by acquiring the voltages of the incoming line and the outgoing line of the branch switch;
the high-speed data acquisition system acquires voltage and current values in the classification circuit in real time through high-speed AD sampling, and generates fault information of overload, short circuit, overcurrent, overvoltage, undervoltage and power failure of the classification circuit when the voltage and the current exceed limit values.
As a preferred aspect of the present invention, the low voltage power line broadband carrier communication module includes a power line as a data transmission channel for implementing a data transmission function and a modem for receiving information;
the low-voltage power line broadband carrier communication module loads a high-frequency signal carrying information to current, then the high-frequency signal is transmitted by using the power line, and finally the high-frequency signal is separated from the current by the modem and transmitted to the metering chip.
As a preferred scheme of the present invention, the present invention further includes a master node carrier module, the low voltage power line broadband carrier communication modules in all the hierarchical circuits are all used as slave node carrier modules, and the master node carrier module and the slave node carrier modules implement clock synchronization by a simple network time protocol.
As a preferred scheme of the present invention, the present invention further comprises an acoustic alarm integrated in the classification circuit, wherein the acoustic alarm is electrically connected to the output end of the metering chip.
In a preferred embodiment of the present invention, a fault protection device is further integrated on the classification circuit, and the fault protection device includes a control relay K1, a normally closed contact of the control relay K1 is connected in series in the classification circuit, and a coil of the control relay K1 is connected in series between the metering chip and the sound alarm.
As a preferable scheme of the present invention, a sensor is further disposed between the coil of the control relay K1 and the audible alarm, and the sensor is a wireless infrared sensor.
As a preferred scheme of the present invention, the output end of the main node carrier module is connected to an LCD display unit for visually displaying circuit data signals of each stage.
As a preferable scheme of the present invention, the LCD display unit employs a liquid crystal display of LCD 12864.
As a preferable scheme of the present invention, the current transformer is a split core current transformer.
As a preferable scheme of the invention, the low-voltage power line broadband carrier communication module supports DL/T645-2007 and Modubs communication protocols.
The embodiment of the invention has the following advantages:
the invention provides an intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of a low-voltage transformer area, which can realize real-time monitoring of a power supply network of the low-voltage transformer area, and can finish remote communication without wiring by adopting low-voltage power line broadband carrier communication, thereby greatly reducing the difficulty of field communication wiring construction; meanwhile, the communication rate is far greater than that of the traditional RS485, micropower wireless and narrow-band carrier, and the high-speed acquisition requirement of real-time monitoring data of a power supply network of a transformer area is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a flowchart of a working signal of an intelligent monitoring device suitable for synchronous acquisition of power consumption data in a low-voltage transformer area according to an embodiment of the present invention.
In the figure:
1-a branch switch; 2-low voltage power line broadband carrier communication module; 3-a current transformer; 4-a high-speed data acquisition system; 5-a metering chip; 6-main node carrier module; 7-sound alarm; 8-a sensor; 9-LCD display unit;
201-power line; 202-modem.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of a low-voltage transformer area, which can realize real-time monitoring of a power supply network of the low-voltage transformer area, and can finish remote communication without wiring by adopting low-voltage power line broadband carrier communication, thereby greatly reducing the difficulty of field communication wiring construction; meanwhile, the communication rate is far greater than that of the traditional RS485, micropower wireless and narrow-band carrier, and the high-speed acquisition requirement of real-time monitoring data of a power supply network of a transformer area is met.
As shown in fig. 1, three classification circuits are taken as an example in the embodiment of the present invention, and specifically, the present invention includes a plurality of branch switches 1 used in each classification circuit of a low-voltage distribution grid, where the branch switches 1 are conventional non-intelligent switches, and an intelligent monitoring unit is additionally installed on each circuit, so as to implement real-time monitoring of an equipment operating state, implement high-precision measurement and metering functions on each classification circuit, and simultaneously solve a communication problem with a distribution transformer terminal on the premise of no need of wiring.
In this embodiment, the intelligent monitoring unit includes low voltage power line broadband carrier communication module 2 for realizing the data remote communication transmission function, current transformer 3 for on-off state monitoring, high speed data acquisition system 4 for line fault detection and metering chip 5 for realizing the metering function, and what current transformer 3 adopted is pincerlike current transformer, the output of low voltage power line broadband carrier communication module 2 and metering chip 5 electric connection, the input respectively with current transformer 3, high speed data acquisition system 4 electric connection, through current transformer 3 and high speed data acquisition system 4 information collection, then transmit the data information of gathering to metering chip 5 through low voltage power line broadband carrier communication module 2.
The low-voltage power line broadband carrier communication module 2 comprises a power line 201 used as a data transmission channel for realizing a data transmission function and a modem 202 used for receiving information, the low-voltage power line broadband carrier communication module 2 realizes data transmission by using the existing power supply line as an information transmission medium, can directly use the existing power line as the data transmission channel for data transmission, does not need to be rewired, and has the characteristics of convenient equipment installation, line construction cost saving and system cost reduction; compared with wireless communication technologies such as Bluetooth and IrDA, the transmission equipment is not affected by obstacles and is easier to network.
The low-voltage power line broadband carrier communication module 2 loads a high-frequency signal (2M-12M) carrying information on current, then transmits the high-frequency signal by using the power line 201, and finally the modem 202 separates the high-frequency signal from the current and transmits the high-frequency signal to the metering chip 5.
The low-voltage power line broadband carrier communication module 2 can also be used for realizing the functions of clock synchronization and active reporting of abnormal events.
In this embodiment, the system further includes a master node carrier module 6, the low-voltage power line broadband carrier communication module 2 establishes a real-time reliable communication network, the low-voltage power line broadband carrier communication modules 2 in all the hierarchical circuits are used as slave node carrier modules, and the master node carrier module 6 and the slave node carrier modules realize clock synchronization through a Simple Network Time Protocol (SNTP);
the working principle of the main node carrier module 6 is the same as that of the low-voltage power line broadband carrier communication module 2, and the existing power line is used as a data transmission channel for data transmission, so that the real-time monitoring information of each grading circuit is uniformly acquired and processed in a centralized manner.
The broadband carrier technology adopted by the low-voltage power line broadband carrier communication module 2 has high communication rate (not less than 1Mbps) and reliable two-way communication characteristic, and the timeliness and the accuracy of active reporting of abnormal events are guaranteed; the centralized monitoring and management extension of the event information are realized, the full-time full-event monitoring is realized for each terminal, and the management range is expanded by hundreds of times.
The low-voltage power line broadband carrier communication module 2 supports DL/T645-2007 and Modubs communication protocols, and seamless communication access between the working equipment classification circuit and the distribution transformer terminal can be achieved.
The current transformer 3 judges the state of the branch switch 1 by collecting the voltage of the incoming line and the outgoing line of the branch switch 1: when the voltage difference between the incoming line and the outgoing line is greater than the critical value, the branch switch 1 is considered to be switched off, and at the moment, a signal indicating that the branch switch 1 works abnormally is generated, so that the function of monitoring the switch state in real time is realized.
The high-speed data acquisition system 4 acquires the voltage and current values in the classification circuit in real time through high-speed AD sampling, and generates fault information of overload, short circuit, overcurrent, overvoltage, undervoltage and power failure of the classification circuit when the voltage and the current exceed the limit values, thereby realizing the function of detecting the faults of each classification circuit.
Further, in the present embodiment, the device further includes an acoustic alarm 7 integrated in the classification circuit, and the acoustic alarm 7 is electrically connected to the output end of the metering chip 5; the grading circuit is integrated with a fault protection device which comprises a control relay K1, the normally closed contact of the control relay K1 is connected in series in the grading circuit, particularly in a power supply circuit of working equipment in the grading circuit, and the coil of the control relay K1 is connected in series between the metering chip 5 and the sound alarm 7.
Through the arrangement of the sound alarm 7, a sound alarm signal can be sent out in time when a fault occurs, and attention of workers is attracted, so that problems can be found and solved in time, and further damage caused by the fault is reduced; through utilizing control relay K1, can be after certain classification circuit breaks down, with this classification circuit automatic disconnection, stop work to avoided the trouble after taking place, this classification circuit still continues to work, the secondary harm that causes.
The specific working principle of the control relay K1 is as follows:
when the grading circuit works normally and no abnormal condition occurs, the normally closed contact of the control relay K1 is always in a closed state, at the moment, the working equipment works normally, and the sound alarm 7 does not start to work; when the classification circuit breaks down, the coil of the control relay K1 is electrified, the sound alarm 7 works, and meanwhile, the normally closed contact of the control relay K1 is disconnected, so that the power supply circuit and the working equipment are disconnected, and the working equipment is protected.
The coil of control relay K1 with still be provided with sensor 8 between the audible alarm 7, what sensor 8 adopted is wireless infrared sensor, and sensor 8's setting is favorable to the sensing sensitive, and the safety warning reduces the potential safety hazard.
The output end of the main node carrier module 6 is connected with an LCD display unit 9 for visually displaying data signals of all levels of circuits, the LCD display unit 9 adopts an LCD12864 liquid crystal display screen, the display screen has strong display function, can display a large amount of characters, graphs and data, has various and clear displays, and has a plurality of advantages in visual degree and brightness definition compared with digital tube display; the data information collected by the current sensor 3 and the high-speed data collection system 4 in each stage of the grading circuit is displayed in real time through the LCD display unit 9, so that the comparison and analysis of workers are facilitated, the prevention is achieved in time, and the fault occurrence probability is greatly reduced.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. An intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage transformer area comprises a plurality of branch switches (1) used in each grading circuit of a power supply network of the low-voltage transformer area, wherein the branch switches (1) adopt non-intelligent switches, it is characterized in that each level of circuit is additionally provided with an intelligent monitoring unit, the intelligent monitoring unit comprises a low-voltage power line broadband carrier communication module (2) for realizing the function of data remote communication and transmission, a current transformer (3) for monitoring the on-off state, a high-speed data acquisition system (4) for detecting the line fault and a metering chip (5) for realizing the metering function, the output end of the low-voltage power line broadband carrier communication module (2) is electrically connected with the metering chip (5), and the input end of the low-voltage power line broadband carrier communication module is electrically connected with the current transformer (3) and the high-speed data acquisition system (4) respectively;
the low-voltage power line broadband carrier communication module (2) is also used for realizing the functions of clock synchronization and active reporting of abnormal events;
the current transformer (3) judges the state of the branch switch (1) by collecting the voltages of the incoming line and the outgoing line of the branch switch (1);
the high-speed data acquisition system (4) acquires voltage and current values in the grading circuit in real time through high-speed AD sampling, and generates fault information of overload, short circuit, overcurrent, overvoltage, undervoltage and power failure of the grading circuit when the voltage and the current exceed limit values;
the low-voltage power line broadband carrier communication module (2) comprises a power line (201) used as a data transmission channel for realizing a data transmission function and a modem (202) used for receiving information;
the low-voltage power line broadband carrier communication module (2) loads a high-frequency signal carrying information on current, then transmits the high-frequency signal by using the power line (201), and finally the modem (202) separates the high-frequency signal from the current and transmits the high-frequency signal to the metering chip (5);
the low-voltage power line broadband carrier communication system is characterized by further comprising a master node carrier module (6), the low-voltage power line broadband carrier communication modules (2) in all the hierarchical circuits are all used as slave node carrier modules, and the master node carrier module (6) and the slave node carrier modules achieve clock synchronization through a simple network time protocol.
2. The intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of a low-voltage transformer area as claimed in claim 1, further comprising an acoustic alarm (7) integrated in the grading circuit, wherein the acoustic alarm (7) is electrically connected with the output end of the metering chip (5).
3. The intelligent monitoring device for synchronous acquisition of distribution data of a low-voltage transformer area as claimed in claim 2, wherein a fault protection device is further integrated on the grading circuit, the fault protection device comprises a control relay K1, the normally closed contact of the control relay K1 is connected in series in the grading circuit, and the coil of the control relay K1 is connected in series between the metering chip (5) and the sound alarm (7).
4. The intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of a low-voltage transformer area as claimed in claim 3, wherein a sensor (8) is further arranged between the coil of the control relay K1 and the sound alarm (7), and the sensor (8) adopts a wireless infrared sensor.
5. The intelligent monitoring device suitable for synchronous acquisition of power distribution data of a low-voltage transformer area as claimed in claim 1, wherein the output end of the main node carrier module (6) is connected with an LCD display unit (9) for visually displaying data signals of each stage of circuit.
6. The intelligent monitoring device for synchronous acquisition of power distribution and utilization data in a low-voltage distribution area as claimed in claim 5, wherein the LCD display unit (9) adopts a liquid crystal display screen of LCD 12864.
7. The intelligent monitoring device for synchronous acquisition of power distribution data in a low-voltage transformer area as recited in claim 1, wherein the current transformer (3) is a split core current transformer.
8. The intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of a low-voltage transformer area as claimed in claim 1, wherein the low-voltage power line broadband carrier communication module (2) supports DL/T645-2007 and Modubs communication protocols.
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| CN110907719A (en) * | 2019-11-05 | 2020-03-24 | 深圳供电局有限公司 | Low-voltage line subsection line loss real-time monitoring device and method |
| CN111025081B (en) * | 2019-11-07 | 2022-07-08 | 广州南方电力集团科技发展有限公司 | Residential voltage monitoring method for power distribution area |
| CN112928819A (en) * | 2021-01-27 | 2021-06-08 | 深圳市深龙达电器有限公司 | Equipment monitoring method and system based on power line high-speed carrier |
| CN113721169A (en) * | 2021-09-01 | 2021-11-30 | 施彬 | Resident power consumption circuit anti-string device and method based on power line carrier communication |
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| CN108695866A (en) * | 2018-07-13 | 2018-10-23 | 珠海英泰利电力技术有限公司 | It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device |
| CN109256856A (en) * | 2018-09-06 | 2019-01-22 | 石家庄科林电气股份有限公司 | The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC) |
| CN109687891A (en) * | 2018-12-11 | 2019-04-26 | 国网重庆市电力公司客户服务中心 | One kind being based on the area's recognition methods of broadband power line carrier platform |
| CN109633326A (en) * | 2018-12-25 | 2019-04-16 | 国网湖南省电力有限公司 | A kind of detachable line loss analysis system |
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