CN105842567A - Monitoring device for single-phase multi-arm sliding contact line power supplying system - Google Patents
Monitoring device for single-phase multi-arm sliding contact line power supplying system Download PDFInfo
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- CN105842567A CN105842567A CN201610350435.8A CN201610350435A CN105842567A CN 105842567 A CN105842567 A CN 105842567A CN 201610350435 A CN201610350435 A CN 201610350435A CN 105842567 A CN105842567 A CN 105842567A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a monitoring device for a single-phase multi-arm sliding contact line power supplying system. The device comprises a plurality of pairs of power supplying carbon brushes; and current transformers sleeve connecting wires of the power supplying carbon brushes and are connected with a multi-functional power source monitoring module electrically. The multi-functional power source monitoring module consists of an analog-digital conversion module, a voltage sampling module, a rectifier module, a scale conversion module, a central processing unit, and an output alarm module, wherein the voltage sampling module, the rectifier module, the scale conversion module, the central processing unit, and the output alarm module are connected in sequence electrically. Each connecting wire is connected with the analog-digital conversion module electrically. The monitoring device has the following advantages: the multi-functional power source monitoring module is integrated with grounding fault detection, phase imbalance detection, default phase detection, phase sequence chaosing detection, no-load detection, over-load detection, and disconnection detection; whether each carbon brush is charged can be detected; and the monitoring device also can carry out single-phase overload alarming, single-phase no-load alarming, single-core line over-current alarming, single-phase two-wire current imbalance alarming, phase sequence detection, default-phase alarming, and grounding detection and the like; and whether the automatic power supplying device is connected normally can be determined according to the current value change of the input port.
Description
Technical field
The present invention relates to the trolley electricity getting system monitoring device of a kind of single-phase multi-arm.
Background technology
When existing trolley electricity getting system normally works, when carbon brush high-speed cruising in trolley, it sometimes appear that carbon brush drops out the situation of slip；If carbon brush drops out slip and is not found, and electricity getting system continues to run forward, and carbon brush will draw slip bad and cause great damage.So the situation whether carbon brush drops out slip needs to do monitoring in real time.For the slip electricity getting system of phase line single armed, generally use the electrical equipments such as phase sequence relay and just can realize checking.But the main equipments such as container gantry crane generally are to the trolley electricity getting system of phase line multi-arm.For this kind of electricity getting system, as being continuing with above-mentioned supervising device, when a carbon brush of a phase therein drops out slip, its system power supply loop still behaves as normally, so the equipment such as phase sequence relay also will not detect exception, and slip still can continue motion.In this case slip certainly will be drawn bad by causing carbon brush.So, monitored by parameters such as the magnitude of voltage of each phase voltage in detection carbon brush electricity getting system and phase sequence angles, to the electricity getting system of single-phase multi-arm be do not have effective.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, it is provided that the trolley electricity getting system monitoring device of the single-phase multi-arm that a kind of reliability is high, safe.
The technical solution adopted for the present invention to solve the technical problems is: the trolley electricity getting system monitoring device of a kind of single-phase multi-arm, including some to power taking carbon brush, it is characterised in that: on the connecting line of described every pair of power taking carbon brush, the most sheathed current transformer；Described current transformer electrically connects a multifunctional power monitoring module；Described multifunctional power monitoring module includes a voltage sampling module, and described every connecting line all electrically connects with described voltage sampling module.
Preferably, described multifunctional power monitoring module also includes: an analog-to-digital conversion module, for the simulation value inputted by described current transformer, is converted into digital quantity；One rectification module, is converted into DC voltage by the alternating voltage that described voltage sampling module inputs；One ratio modular converter, is reduced to the voltage that central processing unit can use to the DC voltage equal proportion inputted by described rectification module；One central processing unit, for comparing current data and the voltage data of input after described ratio module processing；One alarm output module, for the alarm signal exported by described central processing unit, exports with the form of relay contact.Described analog-to-digital conversion module electrically connects described central processing unit；Described voltage sampling module, rectification module, ratio modular converter, central processing unit, alarm output module, order electrically connects successively；Described current transformer electrically connects described analog-to-digital conversion module respectively.
Compared with prior art, the invention has the beneficial effects as follows: multifunctional power monitoring module collection earth fault in the present invention, mutually imbalance, phase shortage, phase sequence is disorderly, unloaded, transship, connects that disconnection etc. is multiple to be detected on all over the body, each carbon brush can be detected the most charged and have that one-phase overload is reported to the police, single-phase unloaded reported to the police, single-core line crosses the functions such as stream warning, single-phase two heart yearn current imbalance warnings, Phase sequence detection, phase shortage warning, earthing detection；Current balance type design, threshold value can be adjusted according to different crane gears, and uneven ratio can also be adjusted according to different crane gears；One multifunctional power monitoring module can realize the Phase sequence detection under three kinds of operating modes, and the selection of three kinds of operating modes can be selected by the digital-scroll technique on product and button；Pile defection function, it is possible to achieve the working condition requirement that the double carbon brush holder automatic electricity taking device of heavy harbour lifting equipment lower frame trolley is special, i.e. one group power taking carbon brush holder does not accesses 2 seconds (time can be to set in the 0-10 second) interior normal conditions；Earthing detection function is applicable to the separate electric power system of PE, N and the public electric power system of PEN, and two kinds of electric power systems can be selected by digital-scroll technique on product and button；Power supply circuits zero load detects, and threshold value can set according to applying working condition；The overload-alarm time becomes anti-time scale with power supply circuits electric current, and ratio value can set according to applying working condition；Multifunctional power monitoring module can realize the current value change according to input port and judge that automatic electricity taking device connection is the most normal.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the embodiment of the present invention.
Figure is labeled as:
1, power taking carbon brush；2, wire is connected；3, current transformer；4, multifunctional power monitoring module；41, analog-to-digital conversion module；42, rectification module；43, ratio modular converter；44, central processing unit；45, voltage sampling module；
46, alarm output module.
Detailed description of the invention
Embodiment below in conjunction with the accompanying drawings, is described further the present invention:
Embodiment one
As it is shown in figure 1, the trolley electricity getting system monitoring device of a kind of single-phase multi-arm, including some to power taking carbon brush 1, multifunctional power monitoring module 4, the trolley of each arm of electricity getting system arranges a pair power taking carbon brush 1；On the connection wire 2 of every pair of power taking carbon brush 1, the most sheathed current transformer 3；Current transformer 3 electrically connects multifunctional power monitoring module 4 respectively；
Multifunctional power monitoring module 4 includes: analog-to-digital conversion module 41, rectification module 42, ratio modular converter 43, central processing unit 44, voltage sampling module 45, alarm output module 46, and analog-to-digital conversion module 41 electrically connects central processing unit 44；Voltage sampling module 45, rectification module 42, ratio modular converter 43, central processing unit 44, alarm output module, order electrically connects successively；Current transformer 3 electrically connects analog-to-digital conversion module 41 respectively；Every connects wire 2 and all electrically connects with voltage sampling module 45；
Analog-to-digital conversion module 41, for the simulation value inputted by current transformer 3, is converted into digital quantity；Rectification module 42, is converted into DC voltage by the alternating voltage that voltage sampling module 45 inputs；Ratio modular converter 43, is reduced to the voltage that central processing unit 44 can use to the DC voltage equal proportion inputted by rectification module 42；Central processing unit 44, for comparing current data and the voltage data of input after ratio modular converter 43 processes；Alarm output module 46, for the alarm signal exported by central processing unit 44, exports with the form of relay contact.
The function of central processing unit 44: carry out comparing with other current parameters by the current parameters that single channel comes in and goes out, when finding and current value that this road is homophase differs ratio or numerical value within the setting time and is considered as this carbon brush when exceeding setting value and drops；Think when exceeding setting value or ratio within the time set that this electricity getting system electricity consumption is uneven, reports fault when neutralizing numerical value compared with the summation of other phases with circuitry phase input current；By the current value of input three-phase and the calculating of magnitude of voltage being drawn the power of electricity system and judge that whether electricity system is in work；By the voltage of three-phase electricity of input being judged electricity system whether Phase-sequence Fault, if electric voltage over press or under-voltage.
Current transformer 3 gathers the electric current of each power taking carbon brush 1 of all phases, has no current to realize detecting whether single power taking carbon brush 1 drops off trolley by detecting in single power taking carbon brush 1；Each wire 2 that connects electrically connects multifunctional power monitoring module 4 through voltage sampling module 5, and whether phase sequence balances to be used for detecting power supply, if all phase lines, ground wire power down.
The operation principle of the present invention is as follows with work process:
As shown in Figure 1, one, each power taking carbon brush 1 is detected the most charged: 1, power taking carbon brush 1 accesses the input port of multifunctional power monitoring module 4 by current transformer 3, multifunctional power monitoring module 4 sets power taking carbon brush 1 off-line critical electric current value, critical electric current value CbC is 0.01A-0.2A(Current Transformer Secondary side value) between certain value, this value can used scene by button settings by client, and every 0.01A is a gear.If 2 are more than marginal value (at least scanning 5 these port datas within the Cb1 time) from the current duration Cb1 of D.C mutual-inductor 3 input, then the state that sets is as 1, otherwise is 0.Cb1 is can on-the-spot to set the 0-10 second.3, having an input port on multifunctional power monitoring module 4, this port receives the control (controlling voltage 24VDC) of crane, if this port has input to be 1, then carbon brush detection alarm module 46 is reported to the police according to above-mentioned logic detection；If this port is 0, then carbon brush detection is reported to the police and is not activated.4, compare the current status of input port on 6 current transformers 3, if 6 groups of states are identical, be then considered as normal；If having any one group of data less than marginal value, then judging whether that the current value of another carbon brush homophase therewith is more than CBA(CBA is that 3-90A is adjustable) if greater than CBA, then report to the police, do not report to the police if less than CBA.5, data process and use 6 12 or above AD, and CPU end gathers data precision and reaches 0.001A.6, the input of 6 groups of current sources on multifunctional power monitoring module 4 there will be moment 1 group or 3 groups is the situation of zero, if multifunctional power monitoring module 4 can be caused to report power taking carbon brush 1 to be out of order, then for wrong report, in this case should be processed by software or hardware designs, be allowed to not report power taking carbon brush 1 fault.7, think that crane has a lot of frequency conversion equipment, so the power supply input of multifunctional power monitoring module 4 can be disturbed by harmonic wave, may result in the signal distortion of collection, distortion, in this case should be processed by software or hardware designs, be allowed to not report carbon brush fault.
Two, overload-alarm: 1, the rated current of every phase (2 pairs of power taking carbon brush 1 add up) is set as 150A-400A, secondary side on current transformer 3 is 1.5-4A, this load current value CbO on phase monitor board can be by client at the scene by button settings, and every 0.1A is one grade.2, overcurrent and time are inversely: i.e. when input current is 5 times of rated current and the persistent period then reported to the police more than 3 seconds；When input current is 4 times of rated current and the persistent period then reported to the police more than 5 seconds；When input current is 3 times of rated current and the persistent period then reported to the police more than 10 seconds；When input current is 2 times of rated current and the persistent period then reported to the police more than 20 seconds.
Three, zero load is reported to the police: if 6 groups of input current value are respectively less than or equal to the no-load current threshold value CbN set, after persistently detecting 2 seconds, the most not changing state, then output no-load alarm signal, alarm lamp is bright.2, no-load current threshold value CbN is the secondary side current value of 0-1A(current transformer 3) adjustable, every 0.05A mono-grade.Can be adjusted by button at the scene by client.3, airborne signals is only alarm signal, but is not fault-signal, and when i.e. having airborne signals, " normally " relay adhesive, output signal, display lamp is bright.
Four, current balance type: when RTG electric current more than CBE(CBE be 10-250A, i.e. power taking carbon brush 1 detects electric current is 0.1-0.9A), if homophase 2 sets ratio value Cbb to the current ratio of power taking carbon brush 1 more than current balance type, persistently detection 2 seconds, if yet suffered from, then output current imbalance is reported to the police, and alarm lamp is bright；CBE can be on-the-spot by button settings, every 5A mono-grade.3, when RTG current value is less than 30A, current balance type is not detected.4, current balance type ratio value Cbb is to pass through button settings between 30-100%, and every 10% is one grade.5, when there being power taking carbon brush 1 fault, current balance type function is not detected.
Five, Phase sequence detection: 1, have two groups of power line ports on multifunctional power monitoring module 4；Often group includes 3 power line detection terminals and 1 earthing detection terminal.2, in order to be suitable for 3 kinds of operating modes, need in hardware setting 3 kinds selection, can be selected by certain switch on circuit board at the scene according to practical situation by client root: 1) if 2 groups of these interfaces all do not have wiring, this function need not be detected, it is considered as normally (being applicable to U.S.'s project, this port not wiring), this selection is labeled as US on circuit boards；2) if 1 group of this port does not has wiring, then for not having the port of wiring need not detect this function, it is considered as normal；Port for wiring is reported to the police (being applicable to domestic project, 1 port not wiring) according to following 3rd logic detection, and this selection is labeled as CN on circuit boards；3) if 2 groups of these ports have wiring, report to the police according to following 3,4 logic detection.(being applicable to Malaysia's project, 2 port all wiring), this selection is labeled as EU on circuit boards.3, often organize 3 phase power lines and access circuit according to certain order, if any 2 phase phase angles are not equal to 120 degree, persistently detection 2 seconds, be so not equal to 120 degree if appointed, then output alarm signal, alarm lamp bright (2 groups of input ports share an output and report to the police).If the phase angle between the 43 phase power lines often organized is all 120 degree, then comparing the phase angle difference of the terminal A of two groups, if be not zero, then output alarm signal again, alarm lamp is bright.
Six, phase shortage is reported to the police: 1, in order to be suitable for 3 kinds of operating modes, need in hardware setting 3 kinds selection, can be selected on charactron by button at the scene according to practical situation by client root: 1) if 2 groups of these interfaces all do not have wiring, (being applicable to U.S.'s project, this port not wiring) is reported to the police according to following 2 logic detection；2) if 1 group of this port does not has wiring, (being applicable to domestic project, 1 port not wiring) is reported to the police according to following 3 logic detection；3) if 2 groups of these ports have wiring, report to the police according to following 4 logic detection.(being applicable to Malaysia's project, 2 port all wiring).2, when 3 phase power line connectors, the most do not input, be considered as normal, do not produce warning.3, we are defined as 1,2 liang of groups, when not having for the 1st group, are considered as normal, do not produce warning；When the 2nd group of 1 phase or 2 phases do not input, side is persistently detected 2 seconds, if the most do not inputted, then output phase shortage alarm signal, alarm lamp is bright." normally " relay electric-loss.When phase shortage being detected, time delay is answered to report to the police for several seconds.Delay time is the 1-5 second, can be according to on-the-spot practical situation at the scene by button settings, and the 1-5 second is divided into 10 grades, every 0.5 second one grade.After non-full-phase state disappears, phase shortage alarm relay disconnects automatically, and fault-signal disappears automatically." normally " relay is electricly automatic.4, the 3 phase power line connectors of 2 groups, if any 1 phase or 2 phases do not input (1 phase refers to that 2 carbon brush of same phase the most do not input), side is persistently detected 2 seconds, if the most do not inputted, then output phase shortage alarm signal, alarm lamp is bright." normally " relay electric-loss.After non-full-phase state disappears, phase shortage alarm relay disconnects automatically, and fault-signal disappears automatically." normally " relay is electricly automatic.
Above, being only presently preferred embodiments of the present invention, be not the restriction that the present invention makees other form, any those skilled in the art are changed possibly also with the technology contents of the disclosure above or are modified as the Equivalent embodiments of equivalent variations.But every without departing from technical solution of the present invention content, any simple modification, equivalent variations and remodeling above example made according to the technical spirit of the present invention, still fall within the protection domain of technical solution of the present invention.
Claims (2)
1. a trolley electricity getting system monitoring device for single-phase multi-arm, including some to power taking carbon brush, it is characterised in that: on the connecting line of described every pair of power taking carbon brush, the most sheathed current transformer；Described current transformer electrically connects a multifunctional power monitoring module；Described multifunctional power monitoring module includes a voltage sampling module, and described every connecting line all electrically connects with described voltage sampling module.
The trolley electricity getting system monitoring device of single-phase multi-arm the most according to claim 1, it is characterised in that: described multifunctional power monitoring module also includes:
One analog-to-digital conversion module, for the simulation value inputted by described current transformer, is converted into digital quantity；
One rectification module, is converted into DC voltage by the alternating voltage that described voltage sampling module inputs；
One ratio modular converter, is reduced to the voltage that central processing unit can use to the DC voltage equal proportion inputted by described rectification module；
One central processing unit, for comparing current data and the voltage data of input after described ratio module processing；
One alarm output module, for the alarm signal exported by described central processing unit, exports with the form of relay contact；
Described analog-to-digital conversion module electrically connects described central processing unit；Described voltage sampling module, rectification module, ratio modular converter, central processing unit, alarm output module, order electrically connects successively；Described current transformer electrically connects described analog-to-digital conversion module respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350435.8A CN105842567A (en) | 2016-05-25 | 2016-05-25 | Monitoring device for single-phase multi-arm sliding contact line power supplying system |
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| CN201610350435.8A CN105842567A (en) | 2016-05-25 | 2016-05-25 | Monitoring device for single-phase multi-arm sliding contact line power supplying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632224A (en) * | 2017-07-27 | 2018-01-26 | 创驱（上海）新能源科技有限公司 | The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method |
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| CN107632224A (en) * | 2017-07-27 | 2018-01-26 | 创驱（上海）新能源科技有限公司 | The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method |
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Application publication date: 20160810 |
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