CN202602303U - Generator parallel operation system without limitation to voltage value, frequency and phase difference - Google Patents
Generator parallel operation system without limitation to voltage value, frequency and phase difference Download PDFInfo
- Publication number
- CN202602303U CN202602303U CN 201220147182 CN201220147182U CN202602303U CN 202602303 U CN202602303 U CN 202602303U CN 201220147182 CN201220147182 CN 201220147182 CN 201220147182 U CN201220147182 U CN 201220147182U CN 202602303 U CN202602303 U CN 202602303U
- Authority
- CN
- China
- Prior art keywords
- generator
- parallel operation
- output
- voltage
- output voltage
- 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.)
- Expired - Fee Related
Links
Images
Abstract
Provided is a generator parallel operation system without limitation to voltage value, frequency and phase difference. The generator parallel operation system comprises active rectifier units, the number of which matches that of generators for parallel operation. Each active rectifier unit is connected with an alternating-current output terminal of one corresponding generator for parallel operation. The output of each active rectifier unit is parallely connected onto a direct-current output bus. The direct-current voltage value Vdc of the direct-current output bus is greater than or equal to Amax1+Amax2, wherein Amax1 is an output-voltage effective value of one of the generators for parallel connection with highest alternating-current output voltage, and Amax2 is an output-voltage effective value of one of the generators for parallel connection with secondary highest alternating-current output voltage. The generator parallel operation system of the utility model substantially imposes no limitation to selection and configuration of the generators for parallel operation, and therefore achieves significant improvement in construction flexibility and application convenience.
Description
Technical field
The utility model relates to the system that equipment is provided electric power energy, relates in particular in the open air or the beta site adopts Liang Tai and two above generators equipment to be provided the system of electric power energy with the mode of parallel operation.
Background technology
Perhaps interim in the open air place, such as: oil field, drilling platforms, when the public power system can't relate to, need use Liang Tai and the generator more than two usually and come the enough big operation energy to be provided to oil field equipment with the mode of parallel operation.The engine of these parallel operation operations, necessarily require: A, engine have identical voltage, such as requiring the output end voltage difference not surpass 10%; B, engine have identical frequency, and difference can not be arranged; C, engine have identical phase sequence, and difference can not be arranged; And D, engine have identical phase angle, such as not surpassing 10%.So in order to realize the parallel operation of generator, the method that adopts usually now comprises: by means of relevant detection and conditioning equipment; Output voltage, frequency, phase place to each generator of needing parallel operation are adjusted; Make these three parameters of each generator all equate, just can close then the output output switch or the switch that is incorporated into the power networks make generator get into powered operation; Because be subject to the reaction speed that manual operation exists, the parallel operation process wastes time and energy; For this reason; People realize the parallel operation of generator through special also machine mechanism is set; A kind of is central control type; Such as: the disclosed a kind of computer control generating set parallel connection by using method of Chinese patent ZL200910011796.X, it step that comprises has: in the diesel generating set of preparing parallel operation, select one as target machine, all the other are as the adjustment machine; Confirm output voltage amplitude standard error, frequency standard error, phase place standard error; Then, make target machine get into steady-working state, detect its output voltage amplitude, frequency and phase place; Then, detecting output voltage phase place and the reference object machine that the output voltage amplitude of adjustment machine and the adjustment machine was adjusted, detected to the reference object machine output voltage frequency and reference object machine adjusted and detected the adjustment machine adjusts; Within the error qualification that output voltage amplitude, frequency and the phase place of adjustment machine are being set, carry out parallel operation; Another kind is a distributed control type; Such as: the disclosed a kind of diesel generating set that parallelly connected rack is realized the parallel operation function that do not have of Chinese patent ZL200620106796.X; It comprises diesel generating set and the switch-box that is attached thereto, parallel operation control integrated system, and the other end of switch-box connects user load, and parallel operation control integrated system comprises detecting signal unit, signal data processing unit, the speed and pressure-regulating unit that links to each other successively; One tunnel input of detecting signal unit connects user load; Another road input connects diesel generating set, and detecting signal unit also links to each other with the parallel operation control unit that is provided with the transfer of data serial line interface, and one tunnel output of parallel operation control unit connects the variable voltage control unit; Another road output connects the control end of switch-box, and the output of variable voltage control unit links to each other with diesel generating set.These improved procedures; Though can simplify the parallel operation process; But need to increase equipment cost; And the realization of parallel operation is strict with output voltage amplitude, frequency and the phase place of each parallel operation generator in the error range of regulation, thereby parallel operation is constituted many restrictions with the apolegamy of generator, such as: the generator of different electric pressures can not use in a system.Thus it is clear that, be necessary in the engineering practice mode of existing parallel operation is improved.
The utility model content
The technical problem that the utility model will solve is to overcome the deficiency that above-mentioned prior art exists; And a kind of generator parallel operation system is proposed; Can realize the simplification of parallel operation process with less cost, and the realization of parallel operation is not subject to the difference of output voltage values, frequency and the phase place of each parallel operation generator.
The utility model people of the utility model is through discovering: handle through active rectifying device in the generator parallel operation system that direct current is incorporated into the power networks at Jiang Duotai; Dc voltage value Vdc >=Amax1+Amax2 on direct current output bus; Wherein Amax1 is the output voltage effective value of those parallel operation with the ac output voltage soprano in the generator; Amax2 is the output voltage effective value of those parallel operation with time soprano of the ac output voltage in the generator; Originally can be because the circulation phenomenon that the difference of output voltage effective value, frequency and the phase place of each parallel operation generator produces was controlled, even disappearance.Utility model people finds according to this; Satisfying under the above-mentioned condition, carry out the experiment of generator parallel operation system, further find; The input of each parallel operation generator and band carry application state, no longer are subject to the difference of output voltage values, frequency and the phase place of each parallel operation generator.
For this reason; The technical scheme that the utility model proposes to above-mentioned technical problem comprises; A kind of generator parallel operation system that avoids magnitude of voltage, frequency and phase difference restriction is proposed; Comprise and the active rectifying device of parallel operation with generator number coupling; Each active rectifying device links to each other with the ac output end of a corresponding parallel operation with generator, and the output of each active rectifying device is also received on the direct current output bus dc voltage value Vdc >=Amax1+Amax2 on this direct current output bus; Wherein Amax1 is the output voltage effective value of those parallel operation with the ac output voltage soprano in the generator, and Amax2 is the output voltage effective value of those parallel operation with time soprano of the ac output voltage in the generator.
Those parallel operation are hard-core with the phase difference of the ac output voltage of generator.The phase difference of generator alternating current output does not influence the operation of parallel operation system.
Those parallel operation are hard-core with the difference on the frequency of the ac output voltage of generator.The difference on the frequency of generator alternating current output does not influence the operation of parallel operation system.
Those parallel operation do not have strict restriction with the difference of the ac output voltage value of generator.Such as, the generator of 220V electric pressure can use in the parallel operation system with the generator of 380V electric pressure simultaneously.
Those parallel operation do not have strict restriction with the phase sequence of the ac output voltage of generator.
Each active rectifying device comprises an active rectification unit, and in order to convert the three-phase alternating current input into direct current output, it is provided with two high-power controlled rectifier parts corresponding to every cross streams input; And a control unit that links to each other with this active rectification unit, in order to controlling the switch of those high-power controlled rectifier parts, thereby regulate the output dc voltage value of this active rectification unit.
This control unit comprises that a voltage sets subelement, in order to the preset definite value of the output dc voltage value of regulating this active rectification unit.
Comprise also and the switch of parallel operation that each switch is to be connected on corresponding parallel operation with between generator and the active rectifying device with generator number coupling.
Described parallel operation uses generator to be the generator that suits in the open air or adopt the beta site.Preferably, described parallel operation uses generator to be the high-power diesel generator.
Compared with prior art, the generator parallel operation system that avoids magnitude of voltage, frequency and phase difference restriction of the utility model, unrestricted basically to parallel operation with the apolegamy of generator, can improve the structure flexibility and the application portability of generator parallel operation system greatly.
Description of drawings
Fig. 1 is the structured flowchart of the generator parallel operation system embodiment of the utility model.
Fig. 2 is the structured flowchart of active rectifying device in the generator parallel operation system embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is given elaboration further.
The utility model proposes a kind of generator parallel operation method of avoiding magnitude of voltage, frequency and phase difference restriction, may further comprise the steps:
Be provided with and the active rectifying device of parallel operation with generator number coupling, each active rectifying device links to each other with the ac output end of a corresponding parallel operation with generator, and the output of each active rectifying device is also received on the direct current output bus;
Make the dc voltage value Vdc >=Amax1+Amax2 on this direct current output bus; Wherein Amax1 is the output voltage effective value of those parallel operation with the ac output voltage soprano in the generator, and Amax2 is the output voltage effective value of those parallel operation with time soprano of the ac output voltage in the generator.
Before with those generator parallel operation operation: can carry out actual measurement to the effective value of the ac output voltage of each generator; Perhaps; Specification according to each generator is estimated the effective value of the ac output voltage of each generator; Perhaps select a maximum, to obtain those parallel operation with the output voltage effective value of the ac output voltage soprano in the generator with time soprano according to experience; According to the requirement of dc voltage value Vdc >=Amax1+Amax2, the VD value of each active rectifying device is presetted.
In engineering practice, the numerical value of Amax1 and Amax2 can directly adopt the voltage effective value of the zero load of generator.
Parameter-definition in the utility model with the explanation as follows:
Alternating voltage is represented: U=A*1.414*sin (2 π ft+ θ)
=Um*sin (2 π ft+ θ) is wherein: A is an effective value, and Um is an amplitude, and f is a frequency, and θ is a phase place, Um=A*1.414.
Amax1: parallel operation is with ac output voltage soprano's in the generator output voltage effective value.
Amax2: parallel operation is with time soprano's of ac output voltage in the generator output voltage effective value.
Vdc: the VD of active rectifying device.
Those parallel operation do not have strict restriction with the difference of the ac output voltage value of generator.For example, the generator of 220V electric pressure and 380V electric pressure can use simultaneously, and the generator of 380v electric pressure and 660V electric pressure can use simultaneously, and traditional parallel operation mode requires the generator voltage difference not surpass 20%.
Those parallel operation do not have strict restriction with the difference of the ac output voltage value of generator.For example, 50HZ and 60HZ generator can use simultaneously, and traditional parallel operation mode requires generator frequency to equate.
Those parallel operation do not have strict restriction with the phase sequence of the ac output voltage of generator.For example, the generator of a positive phase sequence and a negative phase sequence can use simultaneously, and traditional parallel operation mode requires the generator phase sequence necessary identical.
Referring to Fig. 1; The generator parallel operation system embodiment of the utility model roughly comprises: a plurality of parallel branches; Each branch road comprises a generator, the switch that links to each other with the three-phase alternating current output of this generator and is connected on this switch active rectifying device afterwards that the output of each active rectifying device is carried out direct current and is incorporated into the power networks.Wherein, the three-phase alternating current of first generator U1 output A1, B1, C1 deliver to the input of active rectifying device R1 through K switch 1; The three-phase alternating current output A2 of the second generator U2, B2, C2 deliver to the input of active rectifying device R2 through K switch 2; The three-phase alternating current output A3 of the 3rd generator U3, B3, C3 deliver to the input of active rectifying device R3 through K switch 3; The three-phase alternating current output An of n generator Un, Bn, Cn deliver to the input of active rectifying device Rn through K switch n; Each source rectifying device R1, R2, R3 ... The output of Rn is carried out direct current and is incorporated into the power networks, through anode P and negative terminal N supply load equipment.Need to prove; K switch 1, K2, K3 ... Kn can comprise manual control switch and/or the automatic switch such as contactor such as plug-in strip; The setting of these switches only is to provide the safety and the convenience of system maintenance; Each switch closed or to turn-off can be separate, and unlike prior art must just allow closure to realize the power supply of corresponding generator having satisfied under the corresponding parallel operation condition.Each active rectifying device R1, R2, R3 ... The structure of Rn can be identical.
Referring to Fig. 2, the formation of each active rectifying device roughly comprises: an active rectification unit 1 and a control unit 2 that links to each other with this active rectification unit 1.
In practical application, the purpose of parallel operation for convenience can also make the dc voltage value Vdc >=2*k*Amax1 on this direct current output bus simplifiedly, and wherein k is an adjustment coefficient, and its value can be 1, also can be such as 1.05,1.10,1.15 or the like.
Compared with prior art; The generator parallel operation system of the utility model; Can avoid the restriction of generator voltage value, frequency and phase difference, unrestricted basically to parallel operation with the apolegamy of generator, thus can improve the structure flexibility and the application portability of generator parallel operation system greatly.Thereby: those parallel operation are to allow greater than 20% with the phase difference of the ac output voltage of generator; Those parallel operation are to allow greater than 20% with the frequency difference of the ac output voltage of generator; Those parallel operation are different with the ac output voltage value difference of generator to be to allow greater than 20%.
The system of the utility model; Be specially adapted in the open air or the beta site adopts Liang Tai and two above generators equipment to be provided the application scenarios of electric power energy with the mode of parallel operation; Especially, the suitable application scenarios of supplying power of power consumption equipment through dc bus, such as: the exploitation in oil field.The alleged generator general reference of the utility model is adapted at open-air or the beta site can be the device of three-phase alternating current electric energy with this thermal power transfer through burning such as fuel such as natural gas, gasoline, diesel oil also to obtain heat energy, refers in particular to diesel engine generator.The parallel operation agency cost of the required configuration of parallel operation of considering powerful diesel engine generator is very high, and the generator of the utility model is meant powerful diesel engine generator especially, and its power output is greater than 100KW.
Foregoing; Be merely the preferred embodiment of the utility model; It is not the embodiment that is used to limit the utility model; Those of ordinary skills can carry out corresponding flexible or modification, so the protection range of the utility model should be as the criterion with the desired protection range of claims very easily according to the main design and the spirit of the utility model.
Claims (6)
1. avoid the generator parallel operation system that magnitude of voltage, frequency and phase difference limit for one kind; It is characterized in that; Comprise and the active rectifying device of parallel operation with generator number coupling; Each active rectifying device links to each other with the ac output end of a corresponding parallel operation with generator, and the output of each active rectifying device is also received on the direct current output bus dc voltage value Vdc >=Amax1+ Amax2 on this direct current output bus; Wherein Amax1 is the output voltage effective value of those parallel operation with the ac output voltage soprano in the generator, and Amax2 is the output voltage effective value of those parallel operation with time soprano of the ac output voltage in the generator.
2. according to the described generator parallel operation of claim 1 system; It is characterized in that; Each active rectifying device comprises an active rectification unit, and in order to convert the three-phase alternating current input into direct current output, it is provided with two high-power controlled rectifier parts corresponding to every cross streams input; And a control unit that links to each other with this active rectification unit, in order to controlling the switch of those high-power controlled rectifier parts, thereby regulate the output dc voltage value of this active rectification unit.
3. according to the described generator parallel operation of claim 2 system, it is characterized in that this control unit comprises that a voltage sets subelement, in order to the preset definite value of the output dc voltage value of regulating this active rectification unit.
4. according to the described generator parallel operation of claim 1 system, it is characterized in that also comprise and the switch of parallel operation with generator number coupling, each switch is to be connected on corresponding parallel operation with between generator and the active rectifying device.
5. according to the described generator parallel operation of claim 1 system, it is characterized in that described parallel operation uses generator to be the generator that suits in the open air or adopt the beta site.
6. according to the described generator parallel operation of claim 5 system, it is characterized in that described parallel operation uses generator to be the high-power diesel generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220147182 CN202602303U (en) | 2012-04-10 | 2012-04-10 | Generator parallel operation system without limitation to voltage value, frequency and phase difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220147182 CN202602303U (en) | 2012-04-10 | 2012-04-10 | Generator parallel operation system without limitation to voltage value, frequency and phase difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202602303U true CN202602303U (en) | 2012-12-12 |
Family
ID=47319819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220147182 Expired - Fee Related CN202602303U (en) | 2012-04-10 | 2012-04-10 | Generator parallel operation system without limitation to voltage value, frequency and phase difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202602303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611142A (en) * | 2012-04-10 | 2012-07-25 | 深圳市合兴加能科技有限公司 | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method |
-
2012
- 2012-04-10 CN CN 201220147182 patent/CN202602303U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611142A (en) * | 2012-04-10 | 2012-07-25 | 深圳市合兴加能科技有限公司 | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201035433Y (en) | Energy bidirectional flowing voltage regulator | |
| CN104254957B (en) | For carrying out the circuit of power conversion between direct current electric wire and alternating current wires | |
| CN104184139B (en) | For DC power flow controller and the control method of Multi-end flexible direct current transmission system | |
| CN103915856B (en) | A kind of base station is grid-connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN106159942B (en) | MMC-UPFC system and serial side converter shutdown method thereof | |
| CN101232254A (en) | Power transformer | |
| CN203632572U (en) | Current transformer and photovoltaic power generation and electricity system | |
| CN201750381U (en) | Energy-saving soft starting device for high-voltage asynchronous motor | |
| CN109100590A (en) | A kind of experiment power supply and tandem type static synchronous compensator converter valve test macro | |
| CN201312265Y (en) | Silicon-controlled rectifying device | |
| CN202602303U (en) | Generator parallel operation system without limitation to voltage value, frequency and phase difference | |
| CN104714443B (en) | A kind of polycrystalline reduction Power Regulation power supply and its electric control system | |
| CN105790268B (en) | A kind of low pressure remote conveying electric system | |
| CN206117270U (en) | Numerical control dynamic output machine that charges based on 6752 6754 chip | |
| CN102611142B (en) | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method | |
| CN105067230A (en) | Portable valve-debugging device | |
| CN102624019B (en) | Single-phase 660V-3.3KV long-distance distributed direct power supply system | |
| CN109301855B (en) | Starting method and system of hybrid high-voltage flexible direct-current power grid | |
| CN208675121U (en) | Alternating current-direct current input adaptive switching power circuit | |
| CN103595268B (en) | Frequency converter | |
| CN104426159A (en) | Tripolar DC transmission coordinated control method | |
| CN104022504B (en) | Traction Substation of Electric Railway power supply based on SPWM technology | |
| CN104917394A (en) | Serial photovoltaic array high-voltage isolation apparatus | |
| CN102684513A (en) | Uninterruptible power supply and rectifying circuit of uninterruptible power supply | |
| CN109301846A (en) | Uneven low-voltage controlling device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20170410 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |