CN206274343U - It is three phase combined idle to follow load box - Google Patents
It is three phase combined idle to follow load box Download PDFInfo
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- CN206274343U CN206274343U CN201621302233.8U CN201621302233U CN206274343U CN 206274343 U CN206274343 U CN 206274343U CN 201621302233 U CN201621302233 U CN 201621302233U CN 206274343 U CN206274343 U CN 206274343U
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Abstract
The utility model is related to marine generator technical field of measurement and test, it is particularly a kind of three phase combined idle to follow load box, including the idle follower being made up of control unit, relay, contactor, the active load of multiple difference gears and reactive load, control unit reactive load in real time according to needed for the load condition of default generator parameter and active load is calculated, controls the reactive load of respective notch to load according to required reactive load by relay and contactor；Also include forming Y-connection structure or triangular connection structure with three phase lines of generator output with the three-phase combining structure for being provided with controlling switch and three resistive modules, three resistive module suspension control switch controls.This is idle to follow load box without using high-power transformer to reach the test voltage of 690V, and cost is relatively low, at the same using idle follower before and after transformation adjust automatically reactive load, it is to avoid because of attachment structure change, power factor produces variation.
Description
Technical field
The utility model is related to marine generator technical field of measurement and test, particularly a kind of three phase combined idle to follow load
Case.
Background technology
Generating set is the power source of ship, and the only normal operation of generating set just can ensure that the safety boat of ship
OK, and marine generator group often because fuel oil burn insufficient, piston, nozzle deposit carbon, cylinder body abrasion aggravation, overall efficiency
The problems such as reduction, the underload failure of generating set is caused, and often just find that the performance of generating set occurs after failure generation
Problem, so demand load case periodically carries out to generator band and carrying and testing.Because the generating voltage of generating set is generally required
Test 390V and 690V, therefore traditional load box needs to dispose high-power transformer in load box input, so as to by 390V
Generating voltage be lifted to 690V and tested, but high-power transformer is costly, is unfavorable for popularization and application.
The content of the invention
The purpose of this utility model is to solve weak point of the prior art, there is provided a kind of simple structure, low cost
Three phase combined idle follow load box.
The purpose of this utility model is achieved through the following technical solutions：
There is provided it is a kind of it is three phase combined it is idle follow load box, be included in automatic power adjustment factor when accessing generator
Idle follower, this is idle follower is by control unit, relay, contactor, the active load of multiple difference gears and idle
Load is constituted, idle negative needed for control unit load condition calculating in real time according to default generator parameter and active load
Carry, according to the shut-off that required reactive load passes through Control contactor, by the idle negative of contactor control respective notch
It is loaded into going loading；Also include the three-phase combining structure electrically connected with generator output end, the three-phase combining structure is provided with control and opens
Close and three resistive modules, three one end of resistive module power takings, three resistance from three phase lines of generator output respectively
The equal suspension control switch control of the other end of module, so that three resistive modules form star with three phase lines of generator output
Attachment structure or triangular connection structure.
Wherein, the controlling switch is provided with copper bar, and controlling switch is by copper bar three resistive modules away from three phase lines
One end carry out short circuit, to form Y-connection structure.
Wherein, UPS electric supply installations are additionally provided with, the UPS electric supply installations include conventional power supply branch road, stand-by power supply branch road and
Change-over switch, the idle follower from conventional power supply branch road or stand-by power supply branch road power taking, when conventional power supply branch road is powered off
Change-over switch switches to stand-by power supply branch road and powers.
Wherein, change-over switch transmission electric signal notifies control unit to recalculate and load idle negative in handoff procedure
Carry.
Wherein, the also blower fan including being lowered the temperature to idle follower.
Wherein, blower fan from it is conventional power supply branch road or stand-by power supply branch road power taking.
Wherein, also including communication module, control unit carries out communication and is connected by communication module and long-range host computer.
Wherein, control unit is PLC.
Wherein, also including load monitoring unit, control unit passes through load monitoring unit real-time monitoring active load and nothing
The load condition of work(load.
The utility model controls three resistive modules to form star with three phase lines that generator is exported by controlling switch
Attachment structure or triangular connection structure, the output crest voltage of generator isWhen connection is that triangle connects
During binding structure, the phase voltage in three phase lines of generator output is equal to line voltage, and line current is equal toPhase current again, because
This test voltage is 390V；When connection is star-like attachment structure, three-phase electricity is confluxed by intermediate contact, and the three of generator output
Line voltage in root phase line is equal toPhase voltage, line current is equal to phase current, and the test voltage for now obtaining isCompared with prior art, it is originally idle to follow load box without using high-power transformer to reach 690V's
Test voltage, simple structure and cost is relatively low.Reactive load is automatically adjusted before and after transformation using idle follower simultaneously to load,
Avoid the power factor generation variation because of attachment structure change (output resistance of three-phase combining structure changes).
Brief description of the drawings
Utility model is described further using accompanying drawing, but embodiment in accompanying drawing is not constituted to of the present utility model
What is limited, for one of ordinary skill in the art, on the premise of not paying creative work, can also be according to the following drawings
Obtain other accompanying drawings.
Fig. 1 is the three phase combined idle system block diagram for following load box.
Fig. 2 is the three phase combined idle circuit diagram for following load box.
Fig. 3 is the schematic diagram of the three phase combined idle Y-connection structure for following load box.
Fig. 4 is the schematic diagram of the three phase combined idle triangular connection structure for following load box.
Specific embodiment
It is as shown in Figure 1 it is three phase combined idle follow load box, including by control unit 11, relay, contactor, many
The idle follower that the active load 12 and reactive load 13 of individual different gears are constituted, wherein control unit 11 is made up of PLC,
Reactive loads 13 of the PLC according to needed for the load condition of the parameter of default generator 3 and active load 12 is calculated, according to required
The shut-off that reactive load 13 passes through Control contactor, is added by the reactive load 13 of contactor control respective notch
Carry.Specifically, the parameter (including rated frequency, power factor etc.) of generator 3, operationally, PLC are pre-set on PLC
Required reactive load 13 is calculated according to the load condition of active load 12 and the power factor for setting in real time, then by after
The shut-off of electrical equipment control contactor, by the contactor matching loading correspondence gear of reactive load 13.It should be noted that this it is idle with
Active load 12 and reactive load 13 are arranged to different gears with load box, are set with by active load 12 and reactive load 13
Technical scheme into equal gear is compared, and numerical value range of choice is bigger in the case of identical load quantity, and adjacent values are more flat
It is sliding, so that idle follow load box application more flexible.With reference to Fig. 2, this is idle to follow load box also including defeated with generator 3
Go out the three-phase combining structure 7 of end electrical connection, the three-phase combining structure 7 is provided with controlling switch and three resistive modules, three resistance
The power taking, the equal suspension control switch of the other end of three resistive modules from three phase lines of the output of generator 3 respectively of one end of module
Control, so that three phase lines that three resistive modules are exported with generator 3 form Y-connection structure or triangle is connected knot
Structure.Further, the controlling switch is provided with the copper bar 71 of 690V connection/390V disconnections, and controlling switch passes through the copper bar 71
Three resistive modules carry out short circuit away from three one end of phase line, to form Y-connection structure.The utility model passes through star three
Dexterously be interchangeable for 390V and 690V voltages by angle conversion, needs not move through transformer.With reference to Fig. 3 and Fig. 4, specifically, when
The copper bar 72 that 390V connection/690V disconnect is closed, and R55 these three resistive modules are end to end, and three-phase electricity passes through these three
Contact is operated.It is at this time the circuit of triangular form connection, is equivalent to phase voltage equal to line voltage, line current is equal to
Phase current again.Now the test voltage of generator 3 is 390V, and the voltage for entering into the inside of copper bar 72 is also 390V.Work as 690V
The copper bar 71 that connection/390V disconnects is closed, and the tail end of R55 these three resistive modules all connects, and three-phase electricity is connect by this
Point is confluxed.It is at this time the circuit of wye connection, is equivalent to line voltage and is equal toPhase voltage again, line current is equal to
Phase current.Now the test voltage of generator 3 is 390V, and the voltage for entering into the inside of copper bar 71 will be raised to 690V.With it is existing
Technology is compared, and this is idle to follow load box without using high-power transformer to reach 690 test voltage, simple structure and into
This is relatively low.Simultaneously because the connection of three-phase combining structure 7 changes before and after transformation, its external output resistance also becomes
It is dynamic, now idle follower again according to the parameter of default generator 3, the load condition of active load 12 and attachment structure not
With recalculating required reactive load 13 and controlling the reactive load 13 of different gears to be loaded, so that before and after transformation
Power factor keeps constant.
Further, originally idle to follow load box to be additionally provided with UPS electric supply installations, the UPS electric supply installations include conventional confession
Electric branch road 21, stand-by power supply branch road 22 and change-over switch 23, the idle follower from it is conventional power supply branch road 21 or stand-by power supply
The power taking of branch road 22, after conventional power supply branch road 21 (bank electricity) is de-energized suddenly, change-over switch 23 is transformed into stand-by power supply branch road 22
(ship electricity) is powered, it is to avoid the unexpected dead electricity of load box causes the damage that generator 3 occurs.Preferably, changed in handoff procedure
Switch 23 sends electric signal and notifies that PLC is recalculated and loaded reactive load 13, because the induction reactance in each supply line is different, control
Unit processed 11 recalculated in feeder circuit handoff procedure and control multiple difference gears reactive load 13 load condition,
It is real to realize taking over seamlessly so as to ensure that power factor is unaffected in handoff procedure.
Further, this it is idle follow load box to be additionally provided with communication module 51, PLC by communication module 51 with it is long-range on
Position machine 52 carries out communication connection.PLC, by automatically switching to distance control mode, makes work people when being communicated with long-range host computer 52
The test that member can also realize to generator 3 on the coast, realize by the spot or the long-range software of host computer 52 using reactive power from
It is dynamic to follow function.
Further, it is originally idle to follow load box also including the blower fan 4 lowered the temperature to idle follower, so as to avoid nothing
Work(follows load box operationally to overheat and damage.Preferably, blower fan 4 takes from conventional power supply branch road 21 or stand-by power supply branch road 22
Electricity, so as to ensure the lasting sex work of blower fan 4.
Further, originally idle to follow load box also including load monitoring unit 6, control unit 11 passes through load monitoring list
Unit 6 monitors the load condition of active load 12 and reactive load 13, and PLC compares the wattful power read from load monitoring unit 6
Rate, reactive power, power factor, and calculated according to comparative result feedback adjustment reactive power, it is small until drawing actual deviation degree
Power factor.Citing：It is 0.8 to set the power factor of generator 3, and after loading 100KW active loads 12, PLC will add automatically
Carry the reactive load 13 of 75KVar.Then the measurement data of load monitoring unit 6 is read, whether compares the power factor after loading
It is 0.8.If there is deviation, PLC can accordingly be added and subtracted according to deviation to the gear of reactive load 13, go directly measurement power because
Son reaches 0.8.
Finally it should be noted that above example is only used to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained to the utility model with reference to preferred embodiment, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent, without deviating from this
The spirit and scope of utility model technical scheme.
Claims (9)
1. it is three phase combined it is idle follow load box, be included in access generator when the idle of the automatic power adjustment factor follow
Device, it is characterised in that：The idle follower by control unit, relay, contactor, the active load of multiple difference gears and
Reactive load is constituted, and control unit load condition in real time according to default generator parameter and active load calculates required nothing
Work(is loaded, and according to the shut-off that required reactive load passes through Control contactor, the nothing of respective notch is controlled by contactor
Work(load is loaded；
Also include the three-phase combining structure electrically connected with generator output end, the three-phase combining structure is provided with controlling switch and three
Resistive module, the power takings from three phase lines of generator output respectively of three one end of resistive module, three resistive modules it is another
The equal suspension control switch control in one end, so that three resistive modules form Y-connection structure with three phase lines of generator output
Or triangular connection structure.
It is 2. as claimed in claim 1 three phase combined idle to follow load box, it is characterised in that：The controlling switch is provided with copper
Row, three resistive modules are carried out short circuit by controlling switch by copper bar away from three one end of phase line, to form Y-connection knot
Structure.
It is 3. as claimed in claim 1 three phase combined idle to follow load box, it is characterised in that：UPS is additionally provided with to power dress
Put, the UPS electric supply installations include conventional power supply branch road, stand-by power supply branch road and change-over switch, the idle follower is from conventional
Power supply branch road or stand-by power supply branch road power taking, when conventional power supply branch road is powered off, change-over switch switches to stand-by power supply branch road and supplies
Electricity.
It is 4. as claimed in claim 3 three phase combined idle to follow load box, it is characterised in that：Changed in handoff procedure and opened
Close transmission electric signal and notify that control unit is recalculated and loads reactive load.
It is 5. as claimed in claim 4 three phase combined idle to follow load box, it is characterised in that：Also include to idle follower
The blower fan lowered the temperature.
It is 6. as claimed in claim 5 three phase combined idle to follow load box, it is characterised in that：Blower fan is from conventional power supply branch road
Or stand-by power supply branch road power taking.
It is 7. as claimed in claim 1 three phase combined idle to follow load box, it is characterised in that：Also include communication module, control
Unit processed carries out communication and is connected by communication module and long-range host computer.
It is 8. as claimed in claim 1 three phase combined idle to follow load box, it is characterised in that：Control unit is PLC.
9. three phase combined idle as described in claim 1 or 3 follows load box, it is characterised in that：Also include load monitoring
Unit, control unit is by load monitoring unit real-time monitoring active load and the load condition of reactive load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621302233.8U CN206274343U (en) | 2016-11-30 | 2016-11-30 | It is three phase combined idle to follow load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621302233.8U CN206274343U (en) | 2016-11-30 | 2016-11-30 | It is three phase combined idle to follow load box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206274343U true CN206274343U (en) | 2017-06-23 |
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ID=59062622
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621302233.8U Active CN206274343U (en) | 2016-11-30 | 2016-11-30 | It is three phase combined idle to follow load box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329085A (en) * | 2017-08-10 | 2017-11-07 | 中国船舶电站设备有限公司 | Load box major loop star is connected switching control system and computational methods with triangle |
| CN109324289A (en) * | 2018-10-31 | 2019-02-12 | 湖南福德电气有限公司 | For testing the high-voltage load box of alternating current-direct current output object |
| CN111812539A (en) * | 2020-07-20 | 2020-10-23 | 中国船舶电站设备有限公司 | Ship power supply remote test system and method |
-
2016
- 2016-11-30 CN CN201621302233.8U patent/CN206274343U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329085A (en) * | 2017-08-10 | 2017-11-07 | 中国船舶电站设备有限公司 | Load box major loop star is connected switching control system and computational methods with triangle |
| CN109324289A (en) * | 2018-10-31 | 2019-02-12 | 湖南福德电气有限公司 | For testing the high-voltage load box of alternating current-direct current output object |
| CN111812539A (en) * | 2020-07-20 | 2020-10-23 | 中国船舶电站设备有限公司 | Ship power supply remote test system and method |
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