CN102035195A - Automatic ground protective device for light rail garage power and control method thereof - Google Patents
Automatic ground protective device for light rail garage power and control method thereof Download PDFInfo
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- CN102035195A CN102035195A CN2010102727262A CN201010272726A CN102035195A CN 102035195 A CN102035195 A CN 102035195A CN 2010102727262 A CN2010102727262 A CN 2010102727262A CN 201010272726 A CN201010272726 A CN 201010272726A CN 102035195 A CN102035195 A CN 102035195A
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Abstract
The invention discloses an automatic ground protective device for a light rail garage power and a control method thereof. The invention is characterized in that a central processing unit (CPU) receives the control instructions transmitted by a control box, and processes the control instructions. When executing a power-down instruction, the CPU takes control to turn off an electric switch K1 on a supply line and close a discharge resistance switch K3, and an alarm unit provides an alarm. At the same time the CPU receives a voltage signal sent back by a power supply line voltage signal detection unit in real time and judges whether the voltage indicated by the voltage signal is greater than a set threshold. If the voltage is greater than the set threshold, the state is not changed; if the voltage is smaller than the set threshold, a ground switch K2 is controlled to be closed and the alarm unit is controlled to stop alarming. When executing a power-on instruction, the CPU controls the alarm unit to send out an alarm, and the ground switch K2 and the discharge resistance switch K3 are switched off, and then the electric switch K1 on the supply line is closed. The device and the method are simple to operate, have the advantages of high degree of automation, the function of automatic power-on alarm, and wide application value.
Description
Technical field
The present invention relates to automatic earth protective device of a kind of light rail garage power supply and control method.
Background technology
The power supply of light rail car is generally direct current 750V---1500V, the single line power supply, and supply line is above the light rail car, and the light rail car contacts power taking by pantograph with supply line, and rail is used for current circuit as ground wire.The light rail garage is used for parking and overhauling of light rail car, has the power supply of independent control, can carry out power-on and power-off control flexibly, is convenient to the maintenance of vehicle.When vehicle roof equipment is overhauled, must be down to supply line, and supply line carried out ground connection, even supply lines is powered on by misoperation or other reasons once more like this, earth connection also can be introduced the earth with electric current, the big electric current that produces also can allow the power supply tripping operation, runs into the electric shock accidents that supply lines and other electric equipments cause when can well the preventativemaintenance personnel carrying out upkeep operation.At present; the normal method that adopts is for as shown in Figure 1; K1 is the last electric control switch of supply lines; it is a cutter type switch; it is opened and turn-offs is to draw by the rotating of a small machine to finish; the rotating of small machine is by the rotating button control of manual operation small machine; the earth protective device in light rail garage is a simple ground connection hook 1; ground connection hook 1 is one one and terminates on the rail (the earth); the other end is made hook-shaped conductor; after the electricity, manually hang on the supply lines with the hook end of insulating bar with ground connection hook 1 under power supply, whole like this supply lines has just been received together with the earth.But there is following shortcoming in above-mentioned technology:
1, total man worker's operation, in the practical operation, a lot of operating personnel scheme simply, be unwilling ground connection is hooked on the supply lines, cause (1) though supply lines is following, but the electric capacity on the light rail car that supply lines connect and other capacitive devices on the supply lines are appointed and are had a large amount of electric energy, and the maintenance personal touches supply lines or other electric equipments still might get an electric shock at roof, and the danger that causes the high-altitude to fall.(2) the maintenance personal during still at the roof upkeep operation, operating personnel allow supply lines power on, and cause the maintenance personal to get an electric shock, danger is fallen in the high-altitude.
2, behind electricity under the supply lines, electric capacity on the light rail car that supply lines connect and other capacitive devices on the supply lines are appointed and are had a large amount of electric energy, directly hang over ground connection hook supply lines on insulating bar this moment, at first can between supply lines and ground connection ditch, produce a large amount of electric sparks, supply lines box ground connection hook is caused damage, in addition because the ground connection hook is directly to receive on the rail from supply lines, therefore contact the moment of supply lines at the ground connection clasp joint, electric capacity on the light rail car that supply lines connect and other capacitive devices on the supply lines, it is an instantaneous discharge process, electric current is very big, be equivalent to instantaneous short-circuit, can significantly reduce the electric capacity on the light rail car that supply lines connects and the useful life of other capacitive devices on the supply lines.
3, when supply lines powers on, at first ground connection to be hooked up down, could power on to supply lines then, yet the site operation personnel often ignores and also hangs with the ground connection hook on the supply lines, and the earth connection shorted to earth when causing powering on that directly powers on, thereby cause the power supply tripping operation, the huge transient current that produces when powering in addition may burn some devices of supply lines.
4, this technical scheme lacks the warning device that powers on, and can not effectively report to the police in the supply lines power up or when charged.
Summary of the invention
The present invention adopts following scheme to overcome the above problems.
1. electricity is under the supply lines; the automatic earth protective device of this invention design will be connected discharge resistance automatically; a large amount of electric energy of electric capacity on the light rail car that supply lines connect and other capacitive devices on the supply lines is released; guaranteed can not wounded when the maintenance personal carries out maintenance activity by this part electric energy; this part energy is slowly released by resistance simultaneously, can not produce infringement to the electric capacity on the light rail car that supply lines connect and other capacitive devices on the supply lines.Can not produce spark when earth connection and supply lines are connected in addition yet, damage switch.
2. owing to be to control automatically by single-chip microcomputer, so deenergization, connection discharge resistance, connection earth connection, disconnect earth connection, send electric alarm, disconnect discharge resistance, energized all is by monolithic processor controlled, action-item can not appear omitting, human error can not occur, cause not having ground connection and situation about powering on, thereby cause personnel to injure or device damage.
3. generally before supply lines powers on; the operating personnel that power on can notify the vehicle maintenance personnel to withdraw supply lines in the neighbourhood; and then power on; yet; the operating personnel that power in the reality forget sometimes to notify the maintenance personal or have the maintenance personal to notify when withdrawing and are omitted; this is to power on cause the injury of getting an electric shock may for these personnel; because the automatic earth protective device of this invention design has the function that goes up electric alarm automatically; after the operating personnel that power on notify the maintenance personal to withdraw; operation powers on; after central control unit is received the instruction that powers on; can sound the last electric alarm that is installed in maintenance activity ground immediately; and light the warning light that powers on, allow the personnel that leave over maintenance activity withdraw, after two minutes; disconnect earthed switch again; disconnect discharge resistance, closed mains switch.The probability of less so greatly maintenance personal's electric shock.
The technological means that the present invention adopts is as follows:
Power supply automatic earth protective device in a kind of light rail garage is characterized in that comprising CPU, control box, supply lines voltage signal detecting unit, switch element and alarm unit;
Described control box is used for operating personnel and powers on and the following signal of telecommunication to the CPU transmission;
Described supply lines voltage signal detecting unit is used to detect voltage swing on the supply lines, and gives CPU with the testing result real-time Transmission;
Described switch element comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, it is upper and lower that described supply lines upper electrical switch K1 is used to control vehicle, described earthed switch K2 is used to control the vehicle supply lines and links to each other together or disconnect, and described discharge resistance K switch 3 is used to control the vehicle supply lines and links to each other with discharge resistance or disconnect;
Described alarm unit is used to carry out sound, light is reported to the police;
Described CPU is used to receive the control command that control box transmits and handles, and send corresponding control command: transmit to such an extent that be electricity instruction down when receiving control box to switch element, CPU is sent to switch element and is disconnected supply lines upper electrical switch K1 and 3 instructions of closed discharge resistance K switch, and the control alarm unit is reported to the police, simultaneously CPU receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit passes back in real time, and judge that whether voltage that this voltage signal represents is greater than setting threshold, as greater than setting threshold, hold mode is constant; As less than setting threshold, the instruction that CPU is sent closed ground switch K2 to switch element is controlled alarm unit simultaneously and is stopped to report to the police; Transmit to such an extent that be the instruction that powers on when receiving control box, described central processing unit controls alarm unit is reported to the police, send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of sending closed supply lines upper electrical switch K1 then to switch element to switch element simultaneously.
Described supply lines voltage signal detecting unit is voltage sensor DCVT, and described CPU is a STC5410 type single-chip microcomputer.
Described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is rotating traction control by small machine; Described discharge resistance K switch 3 is a contactor.
Transmit to such an extent that be the instruction that powers on when receiving control box, described CPU is sent the instruction of closed supply lines upper electrical switch K1 to switch element, after supply lines upper electrical switch K1 closure, described central processing unit controls alarm unit stops to carry out acoustic alarm, only carries out light and reports to the police.
A kind of control method of utilizing above-mentioned protective device to carry out the automatic ground connection of light rail garage power supply is characterized in that comprising: following electric control and last electric control, and concrete steps are as follows:
Following electric control:
(1) operating personnel's operating operation control box sends down the electricity instruction to CPU, and the supply lines upper electrical switch K1 in the central processing unit controls switch element disconnects then, and the control alarm unit is reported to the police;
(2) discharge resistance K switch 3 closures in the central processing unit controls switch element;
(3) simultaneously CPU receives voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit passes back in real time, and judges that whether voltage that this voltage signal represents is greater than setting threshold
(4) as greater than setting threshold, hold mode is constant;
(5) as less than setting threshold, the instruction that CPU is sent closed ground switch K2 to switch element is controlled alarm unit simultaneously and is stopped to report to the police;
Last electric control:
(1) operating personnel's operating operation control box sends the instruction that powers on to CPU, and the central processing unit controls alarm unit is reported to the police then, and in the time of waiting for more than two minutes;
(2) after wait was finished, earthed switch K2 in the central processing unit controls switch element and discharge resistance K switch 3 disconnected;
(3) the supply lines upper electrical switch K1 closure in the central processing unit controls switch element then.
Described upward electric control comprises that also described central processing unit controls alarm unit stops to carry out acoustic alarm after supply lines upper electrical switch K1 closure, only carries out the step that light is reported to the police.
Compare with prior art, advantage of the present invention is conspicuous, and is specific as follows:
1, adopts control automatically, can finish down electricity, discharge, ground connection, disconnection ground connection automatically, disconnect discharge, report to the police, go up a series of controls of electric light, simplified operation, reduced the serious consequence that human error causes.
2, have automatic discharging function, reduced the infringement of ground connection discharge, the risk of the electric shock that also having reduced does not discharge causes the maintenance personal equipment.
3, have the warning function that powers on automatically, reduced electric shock risk the maintenance personal.
Description of drawings
Fig. 1 is original technology earthed circuit schematic diagram;
Fig. 2 is the automatic earth protective device main circuit of a light rail garage power supply schematic diagram;
Fig. 3 is the automatic earth protective device central control unit of a light rail garage power supply schematic diagram.
Among the figure: 1, ground connection hook, 2, CPU, 3, control box, 4, supply lines voltage signal detecting unit, 5, switch element, 6, alarm unit.
Embodiment
The automatic earth protective device of light rail garage power supply shown in Fig. 2 and 3 comprises CPU 2, control box 3, supply lines voltage signal detecting unit 4, switch element 5 and alarm unit 6;
Described control box 3 is used for operating personnel and powers on and the following signal of telecommunication to CPU 2 transmissions;
Described supply lines voltage signal detecting unit 4 is used to detect voltage swing on the supply lines, and gives CPU 2 with the testing result real-time Transmission;
Described switch element 5 comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, it is upper and lower that described supply lines upper electrical switch K1 is used to control vehicle, described earthed switch K2 is used to control the vehicle supply lines and links to each other together or disconnect, and described discharge resistance K switch 3 is used to control the vehicle supply lines and links to each other with discharge resistance or disconnect;
Described alarm unit 6 is used to carry out sound, light is reported to the police;
Described CPU 2 is used to receive the control command that control box 3 transmits and handles, and send corresponding control command: transmit to such an extent that be electricity instruction down when receiving control box 3 to switch element 5, CPU 2 is sent to switch element 5 and is disconnected supply lines upper electrical switch K1 and 3 instructions of closed discharge resistance K switch, and control alarm unit 6 is reported to the police, voltage signal on the vehicle supply lines that while CPU 2 real-time reception supply lines voltage signal detecting units 4 are passed back, and judge that whether voltage that this voltage signal represents is greater than setting threshold (it is threshold criteria that the present invention adopts human safety voltage 36V), as greater than setting threshold, hold mode is constant; As less than setting threshold, the instruction that CPU 2 is sent closed ground switch K2 to switch element 5 is controlled alarm unit 6 simultaneously and is stopped to report to the police; Transmit to such an extent that be the instruction that powers on when receiving control box 3, described CPU 2 control alarm units 6 are reported to the police, send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of sending closed supply lines upper electrical switch K1 then to switch element 5 to switch element 5 simultaneously.
Wherein supply lines voltage signal detecting unit 4 is voltage sensor DCVT, described CPU 2 is a STC5410 type single-chip microcomputer, this chip has 10 AD, can handle the signal that the supply lines voltage signal processing unit is given single-chip microcomputer, can satisfy the design needs.The controlling alarm unit is the unit that is used for electric alarm, alarming horn and alarm lamp two parts are arranged, they are installed in the maintenance activity district of light rail car, its STC single-chip microcomputer is the power supply that switches on or off them by the IO mouth signal control contactor of STC, and they give the alarm or stop the purpose (certain CPU 2 of the present invention also can adopt other single-chip microcomputer, DSP, ARM, FPGA, PLC etc. to have the device of logic control function or equipment as main control unit) of alarm to reach control.Shown in have at least in the control box 3 power on, two control buttons of electricity down, operating personnel can power on by the operation to them and following electric control.
Described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is rotating traction control by small machine, and the rotating of small machine is to adopt the contactor group to realize; Described discharge resistance K switch 3 is a contactor, and only turning on and off of the coil of need control contact just can be realized the shutoff of opening of K3.
Transmit to such an extent that be the instruction that powers on when receiving control box 3, described CPU 2 is sent the instruction of closed supply lines upper electrical switch K1 to switch element 5, after supply lines upper electrical switch K1 closure, described CPU 2 control alarm units 6 stop to carry out acoustic alarm, only carry out light and report to the police.
The control method that this protective device carries out the automatic ground connection of light rail garage power supply comprises: following electric control and last electric control, and concrete steps are as follows:
Following electric control:
(1) operating personnel's operating operation control box 3 sends down the electricity instruction to CPU 2, and the supply lines upper electrical switch K1 in CPU 2 control switch unit 5 disconnects then, and control alarm unit 6 is reported to the police;
(2) discharge resistance K switch 3 closures in CPU 2 control switch unit 5;
(3) simultaneously CPU 2 receives voltage signal on the vehicle supply lines that supply lines voltage signal detecting units 4 pass back in real time, and judges that whether voltage that this voltage signal represents is greater than setting threshold
(4) as greater than setting threshold, hold mode is constant;
(5) as less than setting threshold, the instruction that CPU 2 is sent closed ground switch K2 to switch element 5 is controlled alarm unit 6 simultaneously and is stopped to report to the police.
What at this moment, the vehicle maintenance personnel just can safety carries out the vehicle maintenance operation.After finishing maintenance activity, after supply lines power-on and power-off operating personnel notified the vehicle maintenance personnel to withdraw, operation just can power on.
Last electric control:
(1) operating personnel's operating operation control box 3 sends the instruction that powers on to CPU 2, and CPU 2 control alarm units 6 are reported to the police then, and in the time of waiting for more than two minutes;
(2) after wait was finished, earthed switch K2 in CPU 2 control switch unit 5 and discharge resistance K switch 3 disconnected;
(3) the supply lines upper electrical switch K1 closure in CPU 2 control switch unit 5 then.
In addition, the controlled step that powers on can comprise also that after supply lines upper electrical switch K1 closure described CPU 2 control alarm units 6 stop to carry out acoustic alarm, only carry out the step that light is reported to the police.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (6)
1. the automatic earth protective device of light rail garage power supply is characterized in that comprising CPU (2), control box (3), supply lines voltage signal detecting unit (4), switch element (5) and alarm unit (6);
Described control box (3) is used for operating personnel and powers on and the following signal of telecommunication to CPU (2) transmission;
Described supply lines voltage signal detecting unit (4) is used to detect voltage swing on the supply lines, and gives CPU (2) with the testing result real-time Transmission;
Described switch element (5) comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, it is upper and lower that described supply lines upper electrical switch K1 is used to control vehicle, described earthed switch K2 is used to control the vehicle supply lines and links to each other together or disconnect, and described discharge resistance K switch 3 is used to control the vehicle supply lines and links to each other with discharge resistance or disconnect;
Described alarm unit (6) is used to carry out sound, light is reported to the police;
Described CPU (2) is used to receive the control command that control box (3) transmits and handles, and send corresponding control command: transmit to such an extent that be electricity instruction down when receiving control box (3) to switch element (5), CPU (2) is sent to switch element (5) and is disconnected supply lines upper electrical switch K1 and 3 instructions of closed discharge resistance K switch, and control alarm unit (6) is reported to the police, simultaneously CPU (2) receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit (4) passes back in real time, and judge that whether voltage that this voltage signal represents is greater than setting threshold, as greater than setting threshold, hold mode is constant; As less than setting threshold, CPU (2) is controlled alarm unit (6) simultaneously and is stopped to report to the police to the instruction that switch element (5) sends closed ground switch K2; Transmit to such an extent that be the instruction that powers on when receiving control box (3), described CPU (2) control alarm unit (6) is reported to the police, send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of sending closed supply lines upper electrical switch K1 then to switch element (5) to switch element (5) simultaneously.
2. the automatic earth protective device of a kind of light rail according to claim 1 garage power supply is characterized in that described supply lines voltage signal detecting unit (4) is voltage sensor DCVT, and described CPU (2) is a STC5410 type single-chip microcomputer.
3. the automatic earth protective device of a kind of light rail according to claim 1 garage power supply is characterized in that described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is rotating traction control by small machine; Described discharge resistance K switch 3 is a contactor.
4. the automatic earth protective device of a kind of light rail according to claim 1 garage power supply; it is characterized in that transmitting to such an extent that be the instruction that powers on when receiving control box (3); described CPU (2) is sent the instruction of closed supply lines upper electrical switch K1 to switch element (5); after supply lines upper electrical switch K1 closure; described CPU (2) control alarm unit (6) stops to carry out acoustic alarm, only carries out light and reports to the police.
5. control method of utilizing the described protective device of claim 1 to carry out the automatic ground connection of light rail garage power supply is characterized in that comprising: following electric control and last electric control, and concrete steps are as follows:
Following electric control:
(1) operating personnel's operating operation control box (3) sends down the electricity instruction to CPU (2), and the supply lines upper electrical switch K1 in CPU (2) control switch unit (5) disconnects then, and control alarm unit (6) is reported to the police;
(2) discharge resistance K switch 3 closures in CPU (2) control switch unit (5);
(3) simultaneously CPU (2) receives voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit (4) passes back in real time, and judges that whether voltage that this voltage signal represents is greater than setting threshold
(4) as greater than setting threshold, hold mode is constant;
(5) as less than setting threshold, CPU (2) is controlled alarm unit (6) simultaneously and is stopped to report to the police to the instruction that switch element (5) sends closed ground switch K2;
Last electric control:
(1) operating personnel's operating operation control box (3) sends the instruction that powers on to CPU (2), and CPU (2) control alarm unit (6) is reported to the police then, and in the time of waiting for more than two minutes;
(2) after wait was finished, earthed switch K2 in CPU (2) control switch unit (5) and discharge resistance K switch 3 disconnected;
(3) the supply lines upper electrical switch K1 closure in CPU (2) control switch unit (5) then.
6. control method according to claim 5 is characterized in that described upward electric control comprises also that after supply lines upper electrical switch K1 closure described CPU (2) control alarm unit (6) stops to carry out acoustic alarm, only carries out the step that light is reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010272726.2A CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010272726.2A CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
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| CN102035195A true CN102035195A (en) | 2011-04-27 |
| CN102035195B CN102035195B (en) | 2014-03-12 |
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| CN201010272726.2A Expired - Fee Related CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104505688A (en) * | 2014-12-12 | 2015-04-08 | 国家电网公司 | Operation method and device of grounding wire |
| CN105510765A (en) * | 2014-09-24 | 2016-04-20 | 中车大连电力牵引研发中心有限公司 | Earth fault diagnostic device |
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| CN201812163U (en) * | 2010-08-31 | 2011-04-27 | 中国北车股份有限公司大连电力牵引研发中心 | Automatic ground protection device for power supply of light-track vehicle garage |
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Cited By (3)
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| CN105510765A (en) * | 2014-09-24 | 2016-04-20 | 中车大连电力牵引研发中心有限公司 | Earth fault diagnostic device |
| CN104505688A (en) * | 2014-12-12 | 2015-04-08 | 国家电网公司 | Operation method and device of grounding wire |
| CN104505688B (en) * | 2014-12-12 | 2017-02-22 | 国家电网公司 | Operation method and device of grounding wire |
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|---|---|
| CN102035195B (en) | 2014-03-12 |
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Inventor after: Chen Haiyan Inventor after: Jiang Tao Inventor after: Che Xiangzhong Inventor after: Dai Bijun Inventor before: Jiang Tao Inventor before: Che Xiangzhong Inventor before: Dai Bijun |
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