CN2932764Y - Brushless excitation steam turbine rotary rectifier - Google Patents
Brushless excitation steam turbine rotary rectifier Download PDFInfo
- Publication number
- CN2932764Y CN2932764Y CN 200620035206 CN200620035206U CN2932764Y CN 2932764 Y CN2932764 Y CN 2932764Y CN 200620035206 CN200620035206 CN 200620035206 CN 200620035206 U CN200620035206 U CN 200620035206U CN 2932764 Y CN2932764 Y CN 2932764Y
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- rectifying
- rectifier
- diode
- rotating
- steam turbine
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Abstract
The utility model discloses a rotating current rectifier for brushless excitation steam turbine, comprising a rotating rectifying disc 1 and a rectifying ring 2, wherein the rectifying ring 2 is arranged at the rectifying disc 1, the rectifying ring 2 is provided with a rectifying bridge which is a three-phase rectifying bridge, each of the bridge arm comprises two paralleling diodes 3 and a capacitance-resistance protector is provided, the diode 3 is a rotating diode and radially arranged at the rectifying disc. The utility model has the advantages that the paralleling double diode is arranged in each branch line of the rectifying return circuit, the capacitance-resistance protector and the rotating diodes are also used as the protective measures, thereby increasing the reliability of the current rectifier, effectively preventing the overrating voltage generated in the runner winding by the breaking step of the runner of the steam turbo-generator or the short circuit of the end of the stator, and reliably ensuring the safe and stable operation of the electric generating set.
Description
Technical field
The utility model relates to a kind of rectifier, particularly relates to a kind of brushless excitation steam turbine rotation rectifier.
Background technology
Excitation system is the important component part of synchronous generator, generally form by two parts, a part is used for providing direct current to the magnetic field of generator winding, to set up D.C. magnetic field, so-called exciting power output (or claiming the exciting power unit), another part is used for regulating exciting current when normally moving or breaking down, to satisfy the needs of safe operation, so-called excitation control section (or claiming excitation control unit or field regulator).In service in electric power system, the excitation system of synchronous generator plays an important role, it not only controls the terminal voltage of generator, but also parameters such as control generator reactive power, power factor and electric current etc. all have important effect to static stability and the dynamic stability that improves electric power system.Rectifier is the important component part of generator excited system, and the effect of rectifier is that the three symmetrical electromotive force rectifications that the rotating armature of AC exciter is responded to are become DC potential and input to generator amature excitation winding excitation.Rectifier has the branch of static-rectifier and rotating rectifier, because the output of the direct current of static-rectifier must be passed through the excitation winding that brush and collector ring just can be transported to rotation, for jumbo synchronous generator, its exciting current reaches thousands of amperes, make collector ring seriously overheated, therefore in jumbo synchronous generator, normal employing does not need the rotating rectifier excitation system of brush and collector ring, but owing to action of centrifugal force rectification part there is adverse effect when rotating rectifier rotates, and when generator amature step-out or stator terminal shortcircuit, in the rotor-exciting winding, produces overvoltage.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of brushless excitation steam turbine rotation rectifier is provided.This rectifier is provided with the resistance-capacitance protection device on its each brachium pontis, inhibited to the overvoltage in the rotor-exciting winding, rectifier diode is selected rotating diode for use, strengthens the reliability of rectifier, improves the static stability and the dynamic stability of electric power system.
Goal of the invention of the present utility model is achieved through the following technical solutions: brushless excitation steam turbine rotation rectifier; it comprises rotating rectifier dish, collector ring; collector ring is installed on the rectifying disc; rectifier bridge is installed on the collector ring; rectifier bridge is a three-phase commutation bridge; each brachium pontis is made up of two parallel diodes, produces overvoltage in order to prevent rotor of steam turbo generator step-out or stator terminal shortcircuit in the rotor winding, and each brachium pontis is provided with the resistance-capacitance protection device.
In order effectively to distribute the collector ring heat, collector ring is provided with radiator.
In order to prevent to rotate since centrifugal action to the destruction of rectifier diode, diode is rotary-type diode, radially is installed on the rectifying disc.
The course of work of the present utility model roughly is: the armature winding of three-phase pivot-rotatable type AC exciter is connected on the rectifying disc of brushless excitation steam turbine rotation rectifier, when excitation unit is supplied with the certain exciting current of AC exciter stator winding, it will produce a constant magnetic field, the rotating armature of AC exciter is responded to three symmetrical electromotive forces and is transferred on the three-phase commutation bridge, through the rotating rectifier rectification, to exchange electromotive force and become DC potential and encourage this for the generator amature excitation winding, the main generator unit stator winding just induces three symmetrical electromotive forces.
Brushless excitation steam turbine rotation rectifier described in the utility model each branch road in its commutating circuit is taked double diode in parallel, installs the resistance-capacitance protection device additional and is selected safeguard measures such as rotary-type diode for use; strengthened the reliability of rectifier; prevented that effectively rotor of steam turbo generator step-out or stator terminal shortcircuit from producing overvoltage in the rotor winding, for the safe and stable operation of generating set provides reliable assurance.
Description of drawings
Fig. 1 cutaway view of the present utility model
Among the figure, 1-rectifying disc, 2-collector ring, 3-diode, 4-radiator, 5-conducting ring, 6-insulating case
Embodiment
Further describe the technical solution of the utility model below in conjunction with accompanying drawing: as Fig. 1; brushless excitation steam turbine rotation rectifier; it comprises rotating rectifier dish 1, collector ring 2; collector ring 2 is installed on the rectifying disc 1; on the collector ring 2 rectifier bridge is installed, rectifier bridge is a three-phase commutation bridge, and wherein each brachium pontis is made up of two parallel diodes 3 and is provided with the resistance-capacitance protection device; the input and output of rotating rectifier are introduced by conducting ring 5, and all elements are all by insulating case 6 and rectifying disc 1 electric insulation.
Claims (3)
1, brushless excitation steam turbine rotation rectifier; it is characterized in that: it comprises rotating rectifier dish (1), collector ring (2); collector ring (2) is installed on the rectifying disc (1); collector ring (2) is gone up rectifier bridge is installed; rectifier bridge is a three-phase commutation bridge, and wherein each brachium pontis is made up of two parallel diodes (3) and is provided with the resistance-capacitance protection device.
2, brushless excitation steam turbine rotation rectifier according to claim 1 is characterized in that: collector ring (2) is provided with radiator (4).
3, brushless excitation steam turbine rotation rectifier according to claim 1 is characterized in that: diode (3) is rotary-type diode, and diode (3) radially is installed on the rectifying disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620035206 CN2932764Y (en) | 2006-08-08 | 2006-08-08 | Brushless excitation steam turbine rotary rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620035206 CN2932764Y (en) | 2006-08-08 | 2006-08-08 | Brushless excitation steam turbine rotary rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932764Y true CN2932764Y (en) | 2007-08-08 |
Family
ID=38349255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620035206 Expired - Fee Related CN2932764Y (en) | 2006-08-08 | 2006-08-08 | Brushless excitation steam turbine rotary rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932764Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777141A (en) * | 2012-10-22 | 2014-05-07 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
-
2006
- 2006-08-08 CN CN 200620035206 patent/CN2932764Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777141A (en) * | 2012-10-22 | 2014-05-07 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
| CN103777141B (en) * | 2012-10-22 | 2017-02-22 | 中广核工程有限公司 | Large generator brushless exciter online detection method, system and phase failure method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20100808 |