CN101102056A - Multi-level switch system for power line disconnection protection - Google Patents
Multi-level switch system for power line disconnection protection Download PDFInfo
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- CN101102056A CN101102056A CNA2007100707258A CN200710070725A CN101102056A CN 101102056 A CN101102056 A CN 101102056A CN A2007100707258 A CNA2007100707258 A CN A2007100707258A CN 200710070725 A CN200710070725 A CN 200710070725A CN 101102056 A CN101102056 A CN 101102056A
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Abstract
The invention is concerned with the multi-level switch system for electric power line breaking protection, to install on the three phase four wire power line, on the three phase line system center with the centralized manager for three phase carrier wave communicating (A) and the level one switch (K1-n), on the single phase line system end with the microprocessor for single phase carrier wave communicating and the level two switch (QF), which are communicating through power line. The system end current detector (2) tests the loading current and the residual current at anytime, and sends the signal to the center or the end level two microprocessor (MCU) that shows in the keyboard display unit (ZCG) for obtaining information on time. The centralized manager (A) can send inquire order to each end in cycle and judging the broken branch by if the end cannot respond on time whilst the level one switch will report automatically to protect the whole system on time.
Description
Technical field
The present invention relates to a kind of power line leakage protection system, be to the power line carrier input and instruct the leakage switch protection system of break-make.
Background technology
The broken string of three-phase and four-line low-voltage circuit is not rarely seen, and strong wind, heavy snow, aging circuit all easily break, person poultry safety is waited cause a hidden trouble, and Luo Lu power line disconnection especially, suffering is more so.In recent years the residual current circuit breaker of applying can only be at the broken string generation earth current that contacts to earth, and this earth current value reach that online RCD sets specified operating value the time, trip protection.Unsettledly though break do not contact to earth or contact to earth but earth current does not reach specified operating value, do not shield.By retrieval, " intelligent earth-fault circuit breaker " patented technology of CN1815663A has overvoltage protection and auto-reset function, does not contact to earth and the residual stream unprotect function of Da Eding operating value not to hanging.In a word, to effectively protecting of low-voltage power line broken string, vacancy so far comprehensively.
Summary of the invention
The objective of the invention is at still not having complete in the prior art and effectively the low-voltage power line broken string being carried out under the situation of protection; design a kind of no matter break hang still contact to earth, earth current is greatly still little, all can be in time, the effective multi-level switch system for power line disconnection protection of protection.
The technical measures that realize above-mentioned purpose are: this power line disconnection protects multistage leakage switch system to be installed on the three-phase and four-line power line, is installed in the centralized manager A, the one-level K switch that have three-phase carrier communication function on the triple line
1-nForm system centre, be installed in the microprocessor M and the secondary switch QF that have single-phase carrier communication function on the phase line and form system's end, set up communication contact by power line between the center of system and the end.
In the said system centre, three modulator-demodulator WYT, having signal to receive line RX respectively is connected with multiway analog switch CD, reading transmission control line R/T is connected with decoder HC, there is the line of transmission TX to be connected with center microprocessor MCU, multiway analog switch CD and decoder HC have the line of reception respectively and read the transmission control line and be connected with the center microprocessor, multiway analog switch, decoder, there is interface line to connect between the microprocessor three of center, keyboard-display unit ZLG has clock line, data wire is connected with the center microprocessor, and the center output end of microprocessor connects multichannel one-level K switch
1-n
In the said system end, a modulator-demodulator WYT is connected with terminal microprocessor MCU, and power supply 1, current detector 2, button 3 threes' output is connected with the input of terminal microprocessor, and the latter's output termination display 4 and secondary switch 5 are QF.
The invention has the beneficial effects as follows in the three-phase and four-line power line native system is installed; in case break; no matter be in unsettled, the electric current that contacts to earth is big or little; can both detect instruction one-level switch by carrier signal in time trips; obtain in time, effectively protection, prevent the get an electric shock generation of injures and deaths, electrical equipment damage and fire incident of people and animals.
Description of drawings
Fig. 1 is this multiple-pole switch system works theory diagram.
Fig. 2 is a system centre circuit structure block diagram.
Fig. 3 is system's tail circuit structured flowchart.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and with reference to accompanying drawing: system centre is located in the distribution box, is convenient to centralized management, and each system's end is installed on the phase line.Form the parts of native system, mostly be commercially available acquisition, three modulator-demodulator related elements can be buied in the electronic market; Multiway analog switch buying CD4053 type, decoder is the 74HCl39 type, the one-level K switch
1-n, keyboard-display unit ZLG all can be commercially available assembling obtain, center microprocessor MCU is according to the making of programming voluntarily of functions such as transmitting-receiving, coding and decoding, demonstration, button and switch control.The secondary switch QF of system's end
1-nCommercially available acquisition, terminal microprocessor MCU needs programming voluntarily to make by function.The one-level K switch of system centre
1-n, adopt the asynchronous serial port communication between the centralized manager A, whole system can be selected the zero passage transmission technology, with the reliability that improves system with increase communication distance.
When native system is in running order, be installed in the current detector 2 in the system's end on each branch's phase line, load current and the residual current of bearing uniline detect, and relevant information imported terminal microprocessor MCU, through the carrier modulation demodulation, pass to center microprocessor MCU, on keyboard-display unit ZIG, show, just can make administrative staff obtain the operating voltage of these secondary switch place phase line, when preload, preceding when leakage current or the like situation.The centralized manager A of native system regularly circulates and terminal sends query statement to each, if obtaining end does not at the appointed time reply, can judge that then faults such as broken string take place this road phase line, and the just automatic trip of one-level switch, warning are played comprehensively, protective effect timely.
Native system especially is fit to and the residual current circuit breaker combination; on the earth leakage protective basis of using always; increased the broken string defencive function; no matter unsettled when broken string still contacted to earth; or the earth current that takes place of contacting to earth is greatly or little; or not reaching specified operating value, the one-level switch can both trip protection, has enlarged the earth leakage protective scope.
In system's end of native system, can consider to be provided with all kinds of function of residual current circuit breaker.
Claims (3)
1, a kind of multi-level switch system for power line disconnection protection is installed on the three-phase and four-line power line, it is characterized in that being installed in the centralized manager (A), the one-level switch (K that have three-phase carrier communication function on the triple line
1-n) form system centre, be installed in the microprocessor and secondary switch (QF) the composition system end that have single-phase carrier communication function on the phase line, set up communication contact by power line between the two.
2; multi-level switch system for power line disconnection protection as claimed in claim 1; it is characterized in that in the said system centre; three modulator-demodulators (WYT); having signal to receive line (RX) respectively is connected with multiway analog switch (CD); reading transmission control line (R/T) is connected with decoder (HC); there is transmission line (TX) to be connected with center microprocessor (MCU); multiway analog switch (CD) and decoder (HC) have the line of reception respectively and read the transmission control line and be connected with the center microprocessor; multiway analog switch; decoder; there is interface line to connect between the microprocessor three of center; keyboard-display unit (ZLG) has clock line; data wire is connected with the center microprocessor, and the center output end of microprocessor meets multichannel one-level switch (K
1-n).
3, multi-level switch system for power line disconnection protection as claimed in claim 1; it is characterized in that in the said system end; a modulator-demodulator (WYT) is connected with terminal microprocessor (MCU); power supply (1), current detector (2), button (3) three's output is connected with the input of terminal microprocessor, the latter's output termination display (4) and secondary switch (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100707258A CN101102056A (en) | 2007-08-07 | 2007-08-07 | Multi-level switch system for power line disconnection protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100707258A CN101102056A (en) | 2007-08-07 | 2007-08-07 | Multi-level switch system for power line disconnection protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101102056A true CN101102056A (en) | 2008-01-09 |
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ID=39036211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100707258A Pending CN101102056A (en) | 2007-08-07 | 2007-08-07 | Multi-level switch system for power line disconnection protection |
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| CN (1) | CN101102056A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860007A (en) * | 2010-04-20 | 2010-10-13 | 山东卓尔电气有限公司 | Remote intelligent residual current monitoring and protection system |
| CN103344869A (en) * | 2013-06-20 | 2013-10-09 | 山东大学 | Wire-breakage alarming device and method suitable for 6-35kV power distribution network |
| CN104795803A (en) * | 2014-01-16 | 2015-07-22 | 西门子公司 | Regional selective interlocking device |
| CN105226634A (en) * | 2014-05-27 | 2016-01-06 | 首瑞（北京）投资管理集团有限公司 | A kind of (TT) distribution system |
| CN105977931A (en) * | 2016-06-14 | 2016-09-28 | 璧垫椽 | Disconnected-null-line and default-phase protection apparatus and method, and power grid fault positioning apparatus |
| WO2018171240A1 (en) * | 2017-03-22 | 2018-09-27 | 南京南瑞继保电气有限公司 | Method and system for protection against disconnection of power transmission and distribution lines |
| CN111224384A (en) * | 2019-12-09 | 2020-06-02 | 国网江苏省电力有限公司镇江供电分公司 | Method for comparing line voltage vector difference on two sides of line and protecting line breakage by adopting loop closing and opening operation |
-
2007
- 2007-08-07 CN CNA2007100707258A patent/CN101102056A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860007A (en) * | 2010-04-20 | 2010-10-13 | 山东卓尔电气有限公司 | Remote intelligent residual current monitoring and protection system |
| CN101860007B (en) * | 2010-04-20 | 2012-08-15 | 山东卓尔电气有限公司 | Remote intelligent residual current monitoring and protection system |
| CN103344869A (en) * | 2013-06-20 | 2013-10-09 | 山东大学 | Wire-breakage alarming device and method suitable for 6-35kV power distribution network |
| CN103344869B (en) * | 2013-06-20 | 2015-08-12 | 山东大学 | A kind of wire break alarm device and alarm method being applicable to 6 ~ 35kV power distribution network |
| CN104795803A (en) * | 2014-01-16 | 2015-07-22 | 西门子公司 | Regional selective interlocking device |
| US9916193B2 (en) | 2014-01-16 | 2018-03-13 | Siemens Aktiengesellschaft | Zone selective interlocking device |
| CN104795803B (en) * | 2014-01-16 | 2018-07-06 | 西门子公司 | A kind of zone selective interlock device |
| CN105226634A (en) * | 2014-05-27 | 2016-01-06 | 首瑞（北京）投资管理集团有限公司 | A kind of (TT) distribution system |
| CN105977931A (en) * | 2016-06-14 | 2016-09-28 | 璧垫椽 | Disconnected-null-line and default-phase protection apparatus and method, and power grid fault positioning apparatus |
| WO2018171240A1 (en) * | 2017-03-22 | 2018-09-27 | 南京南瑞继保电气有限公司 | Method and system for protection against disconnection of power transmission and distribution lines |
| CN111224384A (en) * | 2019-12-09 | 2020-06-02 | 国网江苏省电力有限公司镇江供电分公司 | Method for comparing line voltage vector difference on two sides of line and protecting line breakage by adopting loop closing and opening operation |
| CN111224384B (en) * | 2019-12-09 | 2021-02-02 | 国网江苏省电力有限公司镇江供电分公司 | Method for comparing line voltage vector difference on two sides of line and protecting line breakage by adopting loop closing and opening operation |
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