CN103683508A - Long-distance intelligent fault monitoring isolation system for country low-voltage power network - Google Patents
Long-distance intelligent fault monitoring isolation system for country low-voltage power network Download PDFInfo
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- CN103683508A CN103683508A CN201310677875.0A CN201310677875A CN103683508A CN 103683508 A CN103683508 A CN 103683508A CN 201310677875 A CN201310677875 A CN 201310677875A CN 103683508 A CN103683508 A CN 103683508A
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Abstract
The invention discloses a long-distance intelligent fault monitoring isolation system for a country low-voltage power network. The long-distance intelligent fault monitoring isolation system for the country low-voltage power network is mainly composed of a data collecting device, a data processing device and a communication device, wherein the data collecting device, the data processing device and the communication device are connected in sequence; the data processing device is connected with an external switch and low-voltage power network voltage and current information is collected by the data collecting device and then sent to the data processing device after being primarily processed; after information is collected and analyzed by the data processing device, the fault position is determined and the external switch is controlled; meanwhile, information is sent to a control center by the data processing device through a communication device. The system can automatically locate distribution network faults and achieve fault isolation and power restoration through long-distance control, so that the reliability of the supply network and the flexibility of power supply are improved.
Description
Technical field
The present invention relates to power domain, specifically refer to a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system.
Background technology
The main task of power distribution network is exactly to provide safe and reliable power supply to user; but because rural power grids location natural conditions are more severe; simultaneously, due to the interference of weather, the factor such as artificial, often can break down and cause power failure, when serious, cause large-area power-cuts.After occurring with electric fault, the mode of using on-pole switch directly to close all line powerings also makes wireline inspection, fault location and isolation to carry out when expanding power-off scope, power failure can have a strong impact on productive life on a large scale, reduces power supply reliability and flexibility.
Accompanying drawing explanation
Fig. 1 is system global structure figure.
Embodiment
The object of the present invention is to provide a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system, this system can automatically be located Distribution Network Failure and realized Fault Isolation and restored electricity by Long-distance Control, thereby reduce a staff workload, improve the intelligent flexible management of supply network.
The present invention is achieved through the following technical solutions:
A kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system, mainly by the data acquisition unit being connected successively, data processing equipment and communicator, formed, described data processing equipment is connected with external switch, described data acquisition unit gathers low voltage electric network electric current and voltage information and went forward side by side after preliminary treatment and send to data processing equipment, data processing equipment is determined abort situation and controls external switch after to information Macro or mass analysis, meanwhile, data processing equipment sends to control centre by communication device by information.
Further, described communication device adopts DATA-6121 communication device, and DATA-6121 communication device is connected with data processing equipment by RS485 interface.DATA-6121 communication device low-consumption wireless device adopts low power dissipation design, by GPRS or short message way remote transmission data, is specially adapted to solar powered monitoring occasion, can greatly reduce solar powered cost and reduce difficulty of construction.
Further, described data acquisition unit comprises voltage transformer, voltage current adapter, amplifying circuit, filter circuit, A/D converter and the microprocessor being connected successively, and described data acquisition unit also comprises the current sensor being connected with voltage current adapter.
Further, described microprocessor is also connected with data storage, and described microprocessor is selected Atmega16, and described data storage is selected read-only memory, and microprocessor is connected with data processing equipment by RS232 interface.Read-only memory is a kind of solid state semiconductor memory that can only read prior stored data, once its characteristic is that store data just cannot be again by it change or deletion, data can not disappear because of power-off.When finding power line leakage, can be by reading the data in read-only memory, the leakage current producing according to the different periods and make electrical appliance situation can tentatively judge power line leakage region in this period.
Further, described data processing equipment mainly consists of with the input control switch, output control switch, the triple gate that are connected with embedded microcontroller respectively embedded microcontroller, described embedded microcontroller is connected with microprocessor, and input control switch is connected with external switch respectively with output control switch, triple gate is connected with communication device.
Further, described embedded microcontroller is selected 89C Series of MCU.This single-chip microcomputer is single command cycle single-chip microcomputer, and speed is fast, built-in 8K data space RAM, and with TTL/485 change-over circuit, TTL/232 change-over circuit, quantity of state/pulsed quantity imput output circuit and reset circuit etc.
Further, described input switch and output switch are all selected relay.System arranges respectively two groups of control switchs, and every group of switch adopts two relays, controls respectively external switch closed and disconnected.
The present invention compared with prior art, has following beneficial effect:
(1) the present invention can position electric network fault automatically, thereby the workload reducing a staff realizes the automatic detection of electrical network;
(2) the present invention can carry out power-off isolation to faulty section circuit, realizes service restoration after fault restoration, realizes the Based Intelligent Control of circuit;
(3) the present invention can realize Long-distance Control, and to the long-range isolation of faulty section circuit and energising, improves power supply reliability and flexibility.
Embodiment
Below in conjunction with specific embodiment, the present invention is further explained in detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
As shown in Figure 1, a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system, mainly by the data acquisition unit being connected successively, data processing equipment and communicator, formed, described data processing equipment is connected with external switch, described data acquisition unit gathers low voltage electric network electric current and voltage information and went forward side by side after preliminary treatment and send to data processing equipment, data processing equipment is determined abort situation and controls external switch after to information Macro or mass analysis, meanwhile, data processing equipment sends to control centre by communication device by information.
Embodiment 2:
The present embodiment further limits described communication device and adopts DATA-6121 communication device on the basis of embodiment 1, and DATA-6121 communication device is connected with data processing equipment by RS485 interface.DATA-6121 communication device low-consumption wireless device adopts low power dissipation design, by GPRS or short message way remote transmission data, is specially adapted to solar powered monitoring occasion, can greatly reduce solar powered cost and reduce difficulty of construction.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 3:
The present embodiment further limits data acquisition unit described in described data acquisition unit and comprises voltage transformer, voltage current adapter, amplifying circuit, filter circuit, A/D converter and the microprocessor being connected successively on the basis of embodiment 1, and described data acquisition unit also comprises the current sensor being connected with voltage current adapter.After voltage measuring transformer electric current and voltage data, information is sent to voltage current adapter, voltage current adapter converts the voltage signal of input to current signal, because when with the long Distance Transmission analog signal of voltage system, the D.C. resistance of signal resistance or transmission line etc. can cause voltage attenuation, the input resistance of signal receiving end is lower, voltage attenuation is larger, decay for fear of signal in transmitting procedure, only has the input resistance that increases signal receiving end, but the increase of signal receiving end input resistance, transmission line interference free performance is reduced, be subject to external interference, signal transmission is unstable, like this when long Distance Transmission analog signal, can not use the voltage way of output, and Voltage-output is converted to electric current output, output signal carries out analog-to-digital conversion and is input to microprocessor processing by after amplification filtering.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 4:
The present embodiment further limits described microprocessor and is also connected with data storage on the basis of embodiment 1, described microprocessor is selected Atmega16, described data storage is selected read-only memory, and microprocessor is connected with data processing equipment by RS232 interface.ATmega16 AVR kernel has abundant instruction set and 32 general purpose working registers.All registers are all directly connected with arithmetic and logical unit, make an instruction can within a clock cycle, access two independently registers simultaneously.This structure has improved code efficiency greatly, and has and than common CISC microcontroller, be up to the data throughput of 10 times.Read-only memory is a kind of solid state semiconductor memory that can only read prior stored data, once its characteristic is that store data just cannot be again by it change or deletion, data can not disappear because of power-off.When finding power line leakage, can be by reading the data in read-only memory, the leakage current producing according to the different periods and make electrical appliance situation can tentatively judge power line leakage region in this period.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 5:
The present embodiment further limits described data processing equipment and mainly embedded microcontroller, consists of with the input control switch, output control switch, the triple gate that are connected with embedded microcontroller respectively on the basis of embodiment 1, described embedded microcontroller is connected with microprocessor, and input control switch is connected with external switch respectively with output control switch, triple gate is connected with communication device.Embedded microcontroller sends to control centre by triple gate, RS485 interface and communication device by information after obtaining current information successively, and carry out accident analysis location and isolation according to the requirement of control centre, embedded microcontroller receives after the information of control centre, by control inputs control switch and output control switch, realize the effective control to external switch.Triple gate is a kind of important bus interface circuit, it is a kind of output stage of expanding logic function, also be a kind of control switch, be mainly used for the connection of bus, because bus only allows to only have a user simultaneously, conventionally on data/address bus, be connected to a plurality of devices, each device is by the signal gating of OE/CE and so on, as device do not have gating words it just in high-impedance state, be equivalent to not be connected in bus, do not affect the work of other device.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 6:
The present embodiment further limits described embedded microcontroller and selects 89C Series of MCU on the basis of embodiment 1.This single-chip microcomputer is single command cycle single-chip microcomputer, and speed is fast, built-in 8K data space RAM, and with TTL/485 change-over circuit, TTL/232 change-over circuit, quantity of state/pulsed quantity imput output circuit and reset circuit etc.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 7:
The present embodiment further limits described input switch and output switch and all selects relay on the basis of embodiment 1.System arranges respectively two groups of control switchs, and every group of switch adopts two relays, controls respectively external switch closed and disconnected.Other parts of the present embodiment are identical with embodiment 1, repeat no more.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, within all falling into protection scope of the present invention.
Claims (7)
1. a rural low voltage network long-distance intelligent malfunction monitoring shielding system, it is characterized in that: mainly by the data acquisition unit being connected successively, data processing equipment and communicator, formed, described data processing equipment is connected with external switch, described data acquisition unit gathers low voltage electric network electric current and voltage information and went forward side by side after preliminary treatment and send to data processing equipment, data processing equipment is determined abort situation and controls external switch after to information Macro or mass analysis, meanwhile, data processing equipment sends to control centre by communication device by information.
2. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 1, it is characterized in that: described communication device adopts DATA-6121 communication device, and DATA-6121 communication device is connected with data processing equipment by RS485 interface.
3. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 1, it is characterized in that: described data acquisition unit comprises voltage transformer, voltage current adapter, amplifying circuit, filter circuit, A/D converter and the microprocessor being connected successively, and described data acquisition unit also comprises the current sensor being connected with voltage current adapter.
4. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 3, it is characterized in that: described microprocessor is also connected with data storage, described microprocessor is selected Atmega16, described data storage is selected read-only memory, and microprocessor is connected with data processing equipment by RS232 interface.
5. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 4, it is characterized in that: described data processing equipment mainly consists of with the input control switch, output control switch, the triple gate that are connected with embedded microcontroller respectively embedded microcontroller, described embedded microcontroller is connected with microprocessor, and input control switch is connected with external switch respectively with output control switch, triple gate is connected with communication device.
6. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 5, is characterized in that: described embedded microcontroller is selected 89C Series of MCU.
7. a kind of rural low voltage network long-distance intelligent malfunction monitoring shielding system according to claim 5, is characterized in that: described input switch and output switch are all selected relay.
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| CN201310677875.0A CN103683508A (en) | 2013-12-13 | 2013-12-13 | Long-distance intelligent fault monitoring isolation system for country low-voltage power network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105304043A (en) * | 2015-11-11 | 2016-02-03 | 开封市金石科技有限公司 | Isolated serial liquid crystal driving system based on current direction and method thereof |
| CN107728008A (en) * | 2017-11-28 | 2018-02-23 | 天津浩源慧能科技有限公司 | A kind of electric network fault detection method |
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| CN1722566A (en) * | 2005-06-22 | 2006-01-18 | 肖冬冰 | Countryside low-voltage electric distribution network automatization controlling device and its method |
| KR20090032396A (en) * | 2007-09-27 | 2009-04-01 | 한국전력공사 | Electric supply automation system |
| CN202084993U (en) * | 2011-05-17 | 2011-12-21 | 中国电力科学研究院 | Standard intelligent distribution transform terminal |
| CN202948040U (en) * | 2012-08-23 | 2013-05-22 | 王金泽 | Intelligent electric energy meter having power failure monitoring and protection functions |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1722566A (en) * | 2005-06-22 | 2006-01-18 | 肖冬冰 | Countryside low-voltage electric distribution network automatization controlling device and its method |
| KR20090032396A (en) * | 2007-09-27 | 2009-04-01 | 한국전력공사 | Electric supply automation system |
| CN202084993U (en) * | 2011-05-17 | 2011-12-21 | 中国电力科学研究院 | Standard intelligent distribution transform terminal |
| CN202948040U (en) * | 2012-08-23 | 2013-05-22 | 王金泽 | Intelligent electric energy meter having power failure monitoring and protection functions |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304043A (en) * | 2015-11-11 | 2016-02-03 | 开封市金石科技有限公司 | Isolated serial liquid crystal driving system based on current direction and method thereof |
| CN107728008A (en) * | 2017-11-28 | 2018-02-23 | 天津浩源慧能科技有限公司 | A kind of electric network fault detection method |
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Application publication date: 20140326 |