CN104836402A - Automatic-excitation IGBT exciter - Google Patents
Automatic-excitation IGBT exciter Download PDFInfo
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- CN104836402A CN104836402A CN201510267986.3A CN201510267986A CN104836402A CN 104836402 A CN104836402 A CN 104836402A CN 201510267986 A CN201510267986 A CN 201510267986A CN 104836402 A CN104836402 A CN 104836402A
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Abstract
The invention discloses an automatic-excitation IGBT exciter, and the exciter comprises a core processor, an excitation coil, an IGBT digital excitation power supply, and an automatic-excitation device. The IGBT digital excitation power supply comprises a power unit, a rectification circuit, a filtering circuit, a PWM output circuit, an isolation drive circuit, an IGBT power tube, a conversion transformer, and a secondary output rectification filtering circuit. Inputted power is used for providing a working voltage for the IGBT power tube after passing through the rectification circuit and the filtering circuit. The output of the core processor is achieved through the PWM output circuit, and the IGBT power tube is driven by the isolation drive circuit to work. The output of the IGBT power tube is used for providing an excitation voltage for the excitation coil after being processed by the conversion transformer and the secondary output rectification filtering circuit. The automatic-excitation device is used for controlling the automatic excitation of the excitation coil. The exciter truly achieves the digital control of a DC power supply, and achieves zero-voltage and zero-ampere adjustment. The exciter can achieve that one computer remotely regulates and controls a plurality of power supplies, and the power is within the range from several kilowatts to dozens of kilowatts.
Description
Technical field
The present invention relates to generating and grid equipment field, particularly a kind of automatic excitation IGBT exciter for generator excitation.
Background technology
In synchronous generator excited system, output voltage and the electric current of General Requirements field power supply are larger, small hydropower station mostly uses silicon controlled rectifier as generator excitation power both at home and abroad at present, and its shortcoming is that volume is large. and efficiency is low. and output ripple is large. and power factor (PF) is low. and dynamic response is slow. and scalability is poor. not easily regulates.Along with the fast development of electron electric power high-frequency inversion technology, IGBT high-frequency high-power digital switch power supply substitutes SCR rectification excitation power supply with its superior function becomes reality.
Summary of the invention
The present invention is directed to small hydropower station excitation con-trol yarn system efficiency low. output ripple is large. and power factor (PF) is low. and dynamic response is slow. and scalability is poor. and the not easily deficiency such as adjustments, provides one automatic excitation IGBT exciter.
Technical scheme of the present invention is:
A kind of excitation IGBT exciter automatically, comprise core processor, excitation money circle, IGBT digital excitation power supply and automatic excitation unit, described IGBT digital excitation power supply comprises power subsystem, rectification circuit, filter circuit, PWM output circuit, isolated drive circuit, IGBT power tube, conversion transformer and secondary output rectifier and filter, power supply input after after described rectification circuit and filter circuit process for described IGBT power tube provides operating voltage, described core processor is exported by described PWM output circuit, described IGBT power tube is driven through isolated drive circuit, described IGBT power tube exports after conversion transformer and secondary output rectifier and filter process as described excitation money circle provides exciting voltage, described automatic excitation unit controls the automatic magnetic exciting work of excitation money circle.
The three-phase working power of automatic excitation IGBT exciter of the present invention picks and holds A.B.C three-phase, close after starter-generator question generator rotating speed is normal the excitation switch of automatic excitation IGBT exciter, power supply is through the rectifying and wave-filtering process of rectification circuit and filter circuit, for IGBT power tube provides operating voltage, core processor exports control signal control PWM output circuit and isolated drive circuit work according to pre-set program simultaneously, thus drive IGBT power tube, IGBT power tube exports through conversion transformation and rectifying and wave-filtering, export at secondary output end, automatic excitation unit is by the program preset, the work of automatic control excitation money circle, thus complete whole automatic IGBT excitation flow process, generator completes automatic excitation and puts into operation.
Further illustrate as of the present invention, described automatic excitation unit comprises excitation power supply, automatically trip switch, voltage isolated variable circuit, rectifier charging circuit and electric discharge excitation unit; Described excitation power supply is through automatic trip switch, voltage isolated variable circuit and rectifier charging circuit to the charging of electric discharge excitation unit, and described electric discharge excitation unit is to excitation money circle power transmission and to described automatic trip switch feedback trip signal.
The present invention threads off process automatically: through automatic trip switch after excitation plant-grid connection. voltage isolated variable. and rectification charging is to certain value. trip switch separating brake, isolate with input power, the action of electric discharge excitation unit, moment, power transmission was to magnet exciting coil, the automatic excitation of generator, automatic excitation completes, and prepares to start next time.
As the preferred technical scheme of the present invention, described excitation power supply comprises the electric module of net and residual voltage module, can Access Network electricity 220V excitation or residual voltage 3-15V magnetize.
As the preferred technical scheme of the present invention, at secondary output end, current/voltage sample circuit and A/D data converting circuit are set, described current/voltage sample circuit gathers the secondary output current voltage signal of described IGBT power tube, by described core processor process after the conversion of A/D data converting circuit.
As the preferred technical scheme of the present invention, described core processor external connecting function expansion interface circuit, for external expanding function circuit, increases function of the present invention.
As the preferred technical scheme of the present invention, the external network communication module with communication function of described core processor, such as RS485 serial port module, application RS485 serial communication, the present invention automatic excitation IGBT exciter can realize the telecommunication with intelligent terminal (as PC), realize an intelligent terminal and control multiple stage automatic excitation IGBT exciter, reach intellectuality, long-range controls.
As the preferred technical scheme of the present invention, the external output conversion circuit of described core processor, can precisely adjust setting by zero volt to maximum and output current precisely can adjust setting by zero peace to maximum for realizing output voltage.
As the preferred technical scheme of the present invention, the external adjustment module of described core processor, is regulated by panel, and key-press input, knob selection etc. complete setting and the selection of the present invention automatic excitation IGBT exciter running parameter.
As the preferred technical scheme of the present invention, the external display circuit of described core processor, for the present invention automatic excitation IGBT exciter running parameter setting interface display and running parameter display.
As the preferred technical scheme of the present invention; also comprise overvoltage crowbar, under-voltage protecting circuit and overheating protection circuit; described overvoltage crowbar and under-voltage protecting circuit access power subsystem; overvoltage, under-voltage protection are carried out to working power; described overheating protection circuit is external in described core processor; overtemperature protection is carried out to core processor, ensures the stable operation of complete machine.
Advantage of the present invention:
(1) real digital control DC power supply, zero volt, zero has pacified tune, and output voltage precisely can adjust setting by zero volt to maximum, and output current precisely can adjust setting by zero peace to maximum, and excitation output voltage also can be arranged by user scene.
(2) be provided with protective circuit, after bulk power grid tripping operation, output voltage automatically reverts to set point, and prevent overvoltage, running frequency 50HZ or 60HZ adapts to automatically.
(3) automatic separate excitation and automatic residual voltage excitation two kinds of modes are adopted.
(4) multiple external circuits is provided with, the communication with intelligent terminal can be realized, realize intellectual remote controlling, available single personal computer remote control and regulation multiple stage power supply, power several kilowatts, to tens kilowatts, is applicable to every any fields of using DC power supply such as industrial electrical equipment is aging, generating excitation, program control plating electrolysis, water treatment.
(5) structure is simple, and volume is little, lightweight, and cost is low.
Accompanying drawing explanation
Fig. 1 is IGBT digital excitation power supply topo graph of the present invention;
Fig. 2 is automatic excitation topo graph of the present invention;
Fig. 3 is main circuit diagram of the present invention;
Fig. 4 is power unit circuit figure of the present invention;
Fig. 5 is overvoltage of the present invention, under-voltage protecting circuit figure;
Fig. 6 is Function Extension interface circuit figure of the present invention.
Embodiment
Embodiment 1:
A kind of excitation IGBT exciter automatically, comprises core processor, excitation money circle, current/voltage sample circuit, A/D data converting circuit, Function Extension interface circuit, RS485 serial communication modular, output conversion circuit, adjustment module, LED display circuit, IGBT digital excitation power supply and automatic excitation unit; Described IGBT digital excitation power supply comprises power subsystem, rectification circuit, filter circuit, PWM output circuit, isolated drive circuit, IGBT power tube, conversion transformer and secondary output rectifier and filter; Described automatic excitation unit comprises 220V and nets electric module and 3-15V residual voltage module, automatically trip switch, voltage isolated variable circuit, rectifier charging circuit and electric discharge excitation unit.
Before the work of the present embodiment automatic excitation IGBT exciter, first pick three-phase working power end A.B.C three-phase, and work input voltage is AC350V, and excitation power supply is selected to meet the electric AC220V of net, and casing is connected with earth mat.After wiring completes, set the running parameters such as output voltage, output current, excitation output voltage by adjustment module.Set the rear starting hydraulic turbine, close after question generator rotating speed is normal excitation switch, nets the current rectifying and wave filtering circuit rectifying and wave-filtering of electric AC220V power supply input through LF1, NTC1 and DB1 composition, for IGBT1 power tube and IGBT 2 power tube provide operating voltage.Meanwhile, core processor is exported by PWM1 and PWM2 two-way, and the drive circuit formed through T3, D3 and D6 etc. drives IGBT1 power tube and IGBT 2 power tube according to the running parameter preset; IGBT power tube exports through conversion transformer T2 and secondary output rectifier and filter, exports at secondary output end; Current/voltage sample circuit, at secondary output end sample rate current voltage, feeds back to core processor; Automatic excitation unit is by the program preset, and automatically control the work of excitation money circle, complete automatic excitation, thus complete whole automatic IGBT excitation flow process, generator completes automatic excitation and puts into operation.
The present embodiment is threaded off process automatically: through automatic trip switch after excitation plant-grid connection. voltage isolated variable. and rectification charging is to certain value. trip switch separating brake, isolate with input power, the action of electric discharge excitation unit, moment, power transmission was to magnet exciting coil, the automatic excitation of generator, automatic excitation completes, and prepares to start next time.
Embodiment 2:
As different from Example 1; the present embodiment is also provided with overvoltage crowbar, under-voltage protecting circuit and overheating protection circuit; described overvoltage crowbar and under-voltage protecting circuit access power subsystem; overvoltage, under-voltage protection are carried out to working power; described overheating protection circuit is external in described core processor; carry out overtemperature protection to core processor, ensure the stable operation of complete machine, all the other operation principles are identical.
Claims (10)
1. an automatic excitation IGBT exciter, comprise core processor, excitation money circle, IGBT digital excitation power supply and automatic excitation unit, it is characterized in that: described IGBT digital excitation power supply comprises power subsystem, rectification circuit, filter circuit, PWM output circuit, isolated drive circuit, IGBT power tube, conversion transformer and secondary output rectifier and filter, power supply input after after described rectification circuit and filter circuit process for described IGBT power tube provides operating voltage, described core processor is exported by described PWM output circuit, described IGBT power tube is driven through isolated drive circuit, described IGBT power tube exports after conversion transformer and secondary output rectifier and filter process as described excitation money circle provides exciting voltage, described automatic excitation unit controls the automatic magnetic exciting work of excitation money circle.
2. automatic excitation IGBT exciter according to claim 1, is characterized in that: described automatic excitation unit comprises excitation power supply, automatically trip switch, voltage isolated variable circuit, rectifier charging circuit and electric discharge excitation unit; Described excitation power supply is through automatic trip switch, voltage isolated variable circuit and rectifier charging circuit to the charging of electric discharge excitation unit, and described electric discharge excitation unit is to excitation money circle power transmission and to described automatic trip switch feedback trip signal.
3. automatic excitation IGBT exciter according to claim 1 and 2, is characterized in that: described excitation power supply comprises the electric module of net and residual voltage module.
4. automatic excitation IGBT exciter according to claim 3, it is characterized in that: also comprise current/voltage sample circuit and A/D data converting circuit, described current/voltage sample circuit gathers current and voltage signals at the secondary output end of described IGBT power tube, after the conversion of A/D data converting circuit, feed back to described core processor.
5. automatic excitation IGBT exciter according to claim 3, is characterized in that: described core processor external connecting function expansion interface circuit.
6. automatic excitation IGBT exciter according to claim 3, is characterized in that: the external network communication module with communication function of described core processor.
7. automatic excitation IGBT exciter according to claim 3, is characterized in that: the external output conversion circuit of described core processor.
8. automatic excitation IGBT exciter according to claim 3, is characterized in that: described core processor external for setting, the adjustment module of input working parameter.
9. automatic excitation IGBT exciter according to claim 3, is characterized in that: the external display circuit of described core processor.
10. automatic excitation IGBT exciter according to claim 3; it is characterized in that: also comprise overvoltage crowbar, under-voltage protecting circuit and overheating protection circuit; described overvoltage crowbar and under-voltage protecting circuit access power subsystem, described overheating protection circuit is external in described core processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510267986.3A CN104836402A (en) | 2015-05-22 | 2015-05-22 | Automatic-excitation IGBT exciter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510267986.3A CN104836402A (en) | 2015-05-22 | 2015-05-22 | Automatic-excitation IGBT exciter |
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| CN104836402A true CN104836402A (en) | 2015-08-12 |
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| CN201510267986.3A Pending CN104836402A (en) | 2015-05-22 | 2015-05-22 | Automatic-excitation IGBT exciter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759885A (en) * | 2016-03-03 | 2016-07-13 | 东莞市纳声电子设备科技有限公司 | Intelligent precision magnetizing machine and magnetizing method thereof |
| CN109150038A (en) * | 2018-09-30 | 2019-01-04 | 岭澳核电有限公司 | Million kilowatt nuclear power station diesel-driven generator excited state judges system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101127503A (en) * | 2007-07-09 | 2008-02-20 | 东北大学 | Micro fuel engine power generation excitation control and protection device and method based on DSP |
| CN201708756U (en) * | 2010-06-07 | 2011-01-12 | 苏州能健电气有限公司 | Driving device of series excited DC motor of variable paddle control system |
| CN202385046U (en) * | 2011-10-31 | 2012-08-15 | 戴树梅 | Synchronous generator inversion type excitation system |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
| CN104505859A (en) * | 2014-12-29 | 2015-04-08 | 吴位跃 | Method for using speed regulators during hydropower station isolated network operation linkage grid-connected power generation |
-
2015
- 2015-05-22 CN CN201510267986.3A patent/CN104836402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127503A (en) * | 2007-07-09 | 2008-02-20 | 东北大学 | Micro fuel engine power generation excitation control and protection device and method based on DSP |
| CN201708756U (en) * | 2010-06-07 | 2011-01-12 | 苏州能健电气有限公司 | Driving device of series excited DC motor of variable paddle control system |
| CN202385046U (en) * | 2011-10-31 | 2012-08-15 | 戴树梅 | Synchronous generator inversion type excitation system |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
| CN104505859A (en) * | 2014-12-29 | 2015-04-08 | 吴位跃 | Method for using speed regulators during hydropower station isolated network operation linkage grid-connected power generation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759885A (en) * | 2016-03-03 | 2016-07-13 | 东莞市纳声电子设备科技有限公司 | Intelligent precision magnetizing machine and magnetizing method thereof |
| CN109150038A (en) * | 2018-09-30 | 2019-01-04 | 岭澳核电有限公司 | Million kilowatt nuclear power station diesel-driven generator excited state judges system |
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Application publication date: 20150812 |
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