CN106505565A - Cooling tower fan electromotor power-supplying circuit - Google Patents
Cooling tower fan electromotor power-supplying circuit Download PDFInfo
- Publication number
- CN106505565A CN106505565A CN201611127089.3A CN201611127089A CN106505565A CN 106505565 A CN106505565 A CN 106505565A CN 201611127089 A CN201611127089 A CN 201611127089A CN 106505565 A CN106505565 A CN 106505565A
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- CN
- China
- Prior art keywords
- cooling tower
- fan electromotor
- tower fan
- power supply
- bypass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of cooling tower fan electromotor power-supplying circuit, which includes that main road supply line, the main road supply line are arranged between power supply and cooling tower fan electromotor；The first air switch and converter being cascaded is provided with the main road supply line, and the cooling tower fan electromotor power-supplying circuit also includes：The one bypass power supply circuit in parallel with main road supply line and for switching the bypass button that cooling tower fan electromotor is powered using bypass power supply circuit.Distant place one-touch can be passed through, realize switching to the current supply circuit of cooling tower fan electromotor on bypass power supply circuit, so that under converter permanent fault, the time for recovering cooling tower operation is reduced to several seconds by a few minutes, the probability that high-voltage direct current is stopped transport is greatly reduced because inner cold water temperature rises, meanwhile, one-touch is operated, also solving needs the multiple air switches of division successively at present, easily because operational error causes the problem of device damage.
Description
Technical field
The present invention and technical field of HVDC transmission, more particularly to a kind of cooling tower fan electromotor power supply powers electricity
Road.
Background technology
In HVDC transmission system, the station of current conversion station with power supply by converter to converter valve cooling system in cooling
Tower fan electromotor is powered, in the case of frequency converter failure, can manual switching to bypass air switch power.When station event occurs with power supply
Barrier, overtension or too low when, or when the fan electromotor of cooling tower overload flow occurs because of self reason, all may
Converter in loop is caused to produce fault alarm.Converter will send a signal to converter valve cooling system after producing fault alarm
Controller, controller will be such which sends to the startup control signal of converter after receiving the signal to set to 0, so that converter stops
Only power, cause cooling tower to be stopped transport.In DC transmission system oepration at full load, cooling tower is will result in inner cold water temperature after stopping transport
Rise (in a few minutes), HVDC transmission system one pole during water temperature over-high, will be caused to stop transport.
Therefore, in station power supply or cooling tower fan electromotor failure, converter produces fault alarm, after cooling tower is stopped transport,
Should be taken immediate steps the fan electromotor operation of recovery cooling tower, it is to avoid therefore HVDC transmission system stops transport.
At present, in straight-flow system current conversion station, fault alarm is produced in converter, after cooling tower is stopped transport, the measure that takes is：
Operator on duty goes to valve cooling chamber scene to carry out involution to controller, when involution is invalid, immediately by sequence of operations, will be cold
But the current supply circuit of tower fan electromotor is switched on bypass air switch current supply circuit.
Existing cooling tower fan electromotor power supply current supply circuit wiring is as shown in figure 1, at present by cooling tower fan electromotor
The operating procedure that current supply circuit is switched on bypass power supply loop is：Closed after disconnecting the air switch Q1 being connected with converter 10 again
Upper air switch Q1, while the signal air switch Q2 that will also close, the state for recovering the cooling tower in monitoring system is operation shape
State.
However, there is certain defect in above-mentioned way：(involution controller cannot recover to transport valve cooling tower converter permanent fault
Operator on duty OK) is needed to go to valve cooling chamber scene to pass through sequence of operations (executing according to strict step) by cooling tower fan
The current supply circuit of motor is switched on bypass air switch current supply circuit, except time-consuming longer, is needed outside the shortcoming of increase staff, it is also possible to
Because operational error causes device damage.
Prior art has much room for improvement and improves.
Content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of cooling tower fan electromotor power supply is powered
Circuit, it is intended to which, when solving existing valve cooling tower converter transient fault, involution controller cannot resume operation needs operator on duty
Go to valve cooling chamber to carry out complex operations, take long, the problem of easy operational error.
In order to achieve the above object, technical scheme below this invention takes：
A kind of cooling tower fan electromotor power-supplying circuit, including main road supply line, the main road supply line is arranged
Between power supply and cooling tower fan electromotor；Wherein, the first air being cascaded is provided with the main road supply line
Switch and converter, wherein, the cooling tower fan electromotor power-supplying circuit also includes：One is in parallel with main road supply line
Bypass power supply circuit and for switching the bypass button that cooling tower fan electromotor is powered using bypass power supply circuit；The bypass is supplied
The second contactor and the second air switch being cascaded is provided with circuit；In addition, first air switch and change
First contactor is additionally provided between frequency device.
Described cooling tower fan electromotor power-supplying circuit, wherein, the bypass button includes：Frequency conversion gear and strong throwing
Gear；When main road supply line is powered to cooling tower fan electromotor, bypass button is placed in frequency conversion gear；When bypass power supply electricity
When road is powered, bypass button is switched to.
Described cooling tower fan electromotor power-supplying circuit, wherein, the bypass button is switched to when file by force, the
One catalyst loss of excitation, second contactor excitation.
Described cooling tower fan electromotor power-supplying circuit, wherein, also includes the 3rd power supply circuits, the 3rd power supply
Circuit and main road supply line are connected in parallel between power supply and cooling tower fan electromotor；The 3rd is provided with 3rd power supply circuits
Air switch.
Described cooling tower fan electromotor power-supplying circuit, wherein, when bypass power supply circuit is to cooling tower fan electromotor
When being powered, one group of terminal of the 3rd air switch is connected, so as to make the recovering state of cooling tower described in monitoring system be
Running status.
Described cooling tower fan electromotor power-supplying circuit, wherein, the bypass button also includes：Stoppage in transit gear, when
When the bypass button is in stoppage in transit gear, main road supply line and bypass power supply circuit are not carried out to cooling tower fan electromotor
Power supply.
Compared to the cooling tower fan electromotor power-supplying circuit that prior art, the present invention are provided, a distant place one can be passed through
Secondary button, realizes switching to the current supply circuit of cooling tower fan electromotor on bypass power supply circuit, so that converter forever event
Under barrier, the time for recovering cooling tower operation was reduced to several seconds by a few minutes, greatly reduced high-voltage direct current because of inner cold water temperature
The probability for rising and stopping transport, meanwhile, one-touch is operated, and is also solved, easy because
Operational error causes the problem of device damage.
Description of the drawings
Fig. 1 is the schematic diagram of cooling tower fan electromotor power-supplying circuit in prior art.
The schematic diagram of the preferred embodiment of the cooling tower fan electromotor power-supplying circuit that Fig. 2 is provided for the present invention.
The wiring schematic diagram of button is bypassed for the present invention in the cooling tower fan electromotor power-supplying circuit that Fig. 3 is provided.
The wiring schematic diagram of signal circuit in the cooling tower fan electromotor power-supplying circuit that Fig. 4 is provided for the present invention.
Specific embodiment
A kind of in view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide cooling tower fan electromotor power supply
Power supply circuits.For making the purpose of the present invention, technical scheme and effect clearer, clear and definite, develop simultaneously embodiment referring to the drawings
The present invention is described in more detail.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and without
Of the invention in limiting.
Fig. 2 is referred to, Fig. 2 shows for the preferred embodiment of the cooling tower fan electromotor power-supplying circuit for providing of the invention
It is intended to.As illustrated, the cooling tower fan electromotor power-supplying circuit includes main road supply line, the main road supply line
It is arranged between power supply 1 and cooling tower fan electromotor 2；Wherein, for being cascaded is provided with the main road supply line
One air switch 100 and converter 200, the cooling tower fan electromotor power-supplying circuit also include：One with main road supply lines
Road bypass power supply circuit in parallel and for switching the bypass button (figure that cooling tower fan electromotor is powered using bypass power supply circuit
Do not indicate in 1)；The second contactor 300 and the second air switch being cascaded is provided with the bypass power supply circuit
400；In addition, being additionally provided with first contactor 500 between first air switch 100 and converter 200.
Specifically, when normally running, main road supply line powers to cooling tower fan electromotor：First air switch 100
Closure, the station power supply of current conversion station by converter to converter valve cooling system in cooling tower fan electromotor power.Work as frequency conversion
Under device failure condition, by pressing bypass button, cooling tower fan electromotor is powered using bypass power supply circuit.
In the present embodiment, as shown in figure 3, the gear of the bypass button 600 includes：Frequency conversion gear and file by force position；
When main road supply line is powered to cooling tower fan electromotor, bypass button 600 is placed in frequency conversion gear；When bypass power supply circuit
When being powered, bypass button is switched to.Specifically, i.e., when bypass button is placed in frequency conversion gear, the first contact
500 excitation of device, 300 loss of excitation of second contactor, on the frequency conversion shelves loop of the left side 300 normally-closed contact of second contactor close position, first
500 coil of catalyst is connected, and the right is filed by force 500 normally-closed contact of first contactor on a loop and disconnected, it is ensured that the second contact
300 coil of device not excitation.When button gear being bypassed for filing by force, in the same manner, can all ensure that 500 coil of first contactor is not encouraged
Magnetic.Therefore, this design is to ensure that first contactor 500, second contactor 300 will not be while excitations, on electric power loop
The situation that two-way power supply is turned on will not be produced.Thus, it is achieved that one key switching, division is multiple successively to solve need at present
Air switch, easily because operational error causes the problem of device damage.
Further, as shown in figure 3, in the present embodiment, the bypass button 600 also includes：Stoppage in transit gear, when described
When bypass button is in stoppage in transit gear, main road supply line and bypass power supply circuit are not supplied to cooling tower fan electromotor
Electricity.
Further, described cooling tower fan electromotor power-supplying circuit also includes the 3rd power supply circuits, described
Three power supply circuits and main road supply line are connected in parallel between power supply and cooling tower fan electromotor；Arrange on 3rd power supply circuits
There is the 3rd air switch 700, as shown in Figure 2.Interim, it is cold that the 3rd air switch 700 in the 3rd power supply circuits is located at valve
Indoor, in the case of being current two loop faults (such as catalyst adhesion etc. is abnormal), operator on duty still can be indoor in valve cooling
The operation recovery cooling tower operation of a series of the 3rd air switch 700 of divisions and the first air switch 100 is carried out, makes power supply pass through
3rd power supply circuits are powered to cooling tower fan electromotor.
In order to avoid the state that monitoring system None- identified bypass power supply circuit is powered to cooling tower fan electromotor,
In the present embodiment, when bypass power supply circuit is powered to cooling tower fan electromotor, one group of terminal of the 3rd air switch connects
Logical, it is running status so as to make the recovering state of cooling tower described in monitoring system, it is to avoid maloperation.As shown in figure 4, second is empty
Air cock 400 closes, and after 300 excitation of second contactor, 13,14 contacting makes 1,2 contacts of the 3rd air switch 700
Connect, produce monitoring signal of the cooling tower fan in running status.
In sum, the cooling tower fan electromotor power-supplying circuit that the present invention is provided, which includes main road supply line, institute
State main road supply line to be arranged between power supply and cooling tower fan electromotor；It is provided with the main road supply line and is connected on one
The first air switch for rising and converter, the cooling tower fan electromotor power-supplying circuit also include：One with main road supply lines
Road bypass power supply circuit in parallel and for switching the bypass button that cooling tower fan electromotor is powered using bypass power supply circuit；Institute
State and on bypass power supply circuit, be provided with the second contactor and the second air switch being cascaded；In addition, first air
First contactor is additionally provided between switch and converter.Such that it is able to pass through distant place one-touch, realize cooling tower fan
The current supply circuit of motor is switched on bypass power supply circuit so that under converter permanent fault, recover cooling tower operation when
Between be reduced to several seconds by a few minutes, greatly reduce high-voltage direct current because inner cold water temperature rises the probability stopped transport, meanwhile, one
Secondary button operation, also solving needs the multiple air switches of division successively at present, easily because operational error causes asking for device damage
Topic.
It is understood that for those of ordinary skills, with technology according to the present invention scheme and its can send out
Bright design in addition equivalent or change, and all these changes or replace the guarantor that should all belong to appended claims of the invention
Shield scope.
Claims (6)
1. a kind of cooling tower fan electromotor power-supplying circuit, including main road supply line, the main road supply line is arranged on
Between power supply and cooling tower fan electromotor；Wherein, it is provided with the first air being cascaded to open in the main road supply line
Close and converter, it is characterised in that the cooling tower fan electromotor power-supplying circuit also includes：One with main road supply line simultaneously
The bypass power supply circuit of connection and for switching the bypass button that cooling tower fan electromotor is powered using bypass power supply circuit；The side
The second contactor and the second air switch being cascaded is provided with the power supply circuits of road；In addition, first air switch
First contactor is additionally provided with and converter between.
2. cooling tower fan electromotor power-supplying circuit according to claim 1, it is characterised in that the bypass button bag
Include：Frequency conversion gear and file by force position；When main road supply line is powered to cooling tower fan electromotor, bypass button is placed in frequency conversion
Gear；When bypass power supply circuit is powered, bypass button is switched to.
3. cooling tower fan electromotor power-supplying circuit according to claim 2, it is characterised in that the bypass button is cut
When shifting to file by force, first contactor loss of excitation, second contactor excitation.
4. cooling tower fan electromotor power-supplying circuit according to claim 1, it is characterised in that also include the 3rd power supply
Circuit, the 3rd power supply circuits and main road supply line are connected in parallel between power supply and cooling tower fan electromotor；Described 3rd supplies
The 3rd air switch is provided with circuit.
5. cooling tower fan electromotor power-supplying circuit according to claim 4, it is characterised in that when bypass power supply circuit
When being powered to cooling tower fan electromotor, one group of terminal of the 3rd air switch is connected, cold described in monitoring system so as to make
But the recovering state of tower is running status.
6. cooling tower fan electromotor power-supplying circuit according to claim 2, it is characterised in that the bypass button is also
Including：Stoppage in transit gear, when the bypass button is in stoppage in transit gear, main road supply line and bypass power supply circuit be not to cold
But tower fan electromotor is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611127089.3A CN106505565A (en) | 2016-12-09 | 2016-12-09 | Cooling tower fan electromotor power-supplying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611127089.3A CN106505565A (en) | 2016-12-09 | 2016-12-09 | Cooling tower fan electromotor power-supplying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106505565A true CN106505565A (en) | 2017-03-15 |
Family
ID=58330672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611127089.3A Pending CN106505565A (en) | 2016-12-09 | 2016-12-09 | Cooling tower fan electromotor power-supplying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769363A (en) * | 2017-12-06 | 2018-03-06 | 国家电网公司 | The apparatus and method that forced oil-circulation air-cooled transformer cooler is thrown by force |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202995429U (en) * | 2012-12-19 | 2013-06-12 | 宁夏电力公司中卫供电局 | Frequency conversion air-cooling control device of transformer |
| CN205377443U (en) * | 2016-01-13 | 2016-07-06 | 国家电网公司 | Cooling tower fan electrical power generating system |
| CN105846548A (en) * | 2016-06-16 | 2016-08-10 | 上海科泰电源股份有限公司 | Power plant black start dedicated diesel generating set remote monitoring system |
-
2016
- 2016-12-09 CN CN201611127089.3A patent/CN106505565A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202995429U (en) * | 2012-12-19 | 2013-06-12 | 宁夏电力公司中卫供电局 | Frequency conversion air-cooling control device of transformer |
| CN205377443U (en) * | 2016-01-13 | 2016-07-06 | 国家电网公司 | Cooling tower fan electrical power generating system |
| CN105846548A (en) * | 2016-06-16 | 2016-08-10 | 上海科泰电源股份有限公司 | Power plant black start dedicated diesel generating set remote monitoring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769363A (en) * | 2017-12-06 | 2018-03-06 | 国家电网公司 | The apparatus and method that forced oil-circulation air-cooled transformer cooler is thrown by force |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170315 |
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| RJ01 | Rejection of invention patent application after publication |