CN201766546U - Wind generating set protector for coping with voltage dip of power grid - Google Patents
Wind generating set protector for coping with voltage dip of power grid Download PDFInfo
- Publication number
- CN201766546U CN201766546U CN2010205098395U CN201020509839U CN201766546U CN 201766546 U CN201766546 U CN 201766546U CN 2010205098395 U CN2010205098395 U CN 2010205098395U CN 201020509839 U CN201020509839 U CN 201020509839U CN 201766546 U CN201766546 U CN 201766546U
- Authority
- CN
- China
- Prior art keywords
- auxiliary
- thyristor
- electrical nodes
- circuit
- main
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a wind generating set protector for coping with voltage dip of a power grid which adopts a crowbar circuit to adapt to low voltage ride-through requirement and is characterized in that the crowbar circuit of low voltage ride-through requirement at least comprises a set of main thyristor and an auxiliary circuit consisting of an auxiliary thyristor, an auxiliary capacitance and an auxiliary reactor, moreover, the on-off of the crowbar circuit is together realized by the main thyristor and the auxiliary thyristor; when the crowbar circuit is needed to be connected, the main thyristor can be triggered to connect the circuit; when the crowbar circuit is needed to be disconnected, the auxiliary thyristor can be triggered, and the auxiliary capacitance and the auxiliary reactor work together to disconnect the main thyristor which is connected previously. The wind generating set protector for coping with voltage dip of the power grid uses the disconnecting loop of the thyristor consisting of the auxiliary thyristor, the auxiliary capacitance and the auxiliary reactor to trigger the auxiliary thyristor when on-off is required, thereby being capable of disconnecting the main thyristor which is connected previously.
Description
Technical field
The utility model relates to a kind of line voltage control device of wind generator system, particularly a kind ofly tackles the wind turbine generator protector that the line voltage short time falls.Be mainly used in the crowbar circuit that low-voltage is passed through in the wind generator system.
Background technology
In wind generator system; double-fed wind-driven power generation system for example; because the fluctuation of electrical network or the short-duration failure of electrical network; and the initiation electric network electric voltage drop, this electric voltage dropping will make wind turbine generator change low-voltage over to from nominal situation and pass through operating mode, along with the rising of wind energy proportion in electrical network; if it is bad that low-voltage is passed through processing; will cause wind-powered electricity generation unit large tracts of land and shut down, cause enormous impact, even cause mains breakdown to electrical network.
The reply line voltage short time is fallen, and is the problem that wind turbine generator must be handled well, and for the double-fed wind-driven power generation system, when electrical network fell, overvoltage, overcurrent can appear in its rotor-end; The current transformer middle dc voltage is raise, the safety of current transformer is constituted a serious threat, in order to eliminate this problem, in when, low-voltage taking place passing through, need be with the rotor loop bypass, and the part energy that in bypass, consumes rotor loop.Therefore, new electrical network rule request wind generator system has low voltage ride-through capability, and now general wind power system can greatly improve its fault ride-through capacity by increasing the Crowbar protective circuit.
Usually, the crowbar circuit is made up of diode rectifier bridge and thyristor, and diode rectifier bridge is rectified into direct current with the output of rotor three-phase; in needs, trigger thyristor, rotor; diode rectifier, thyristor and energy consumption resistance are formed a loop, realize the protection to current transformer.
But thyristor can not turn-off after triggering voluntarily, and its shutoff can only rely on the reverse of external circuit voltage.This crowbar circuit can only be realized the protection of current transformer, can not finish the low-voltage of wind-powered electricity generation unit and pass through.After this crowbar circuit triggers, need wait for a period of time, and the stator of motor is disconnected from electrical network, treat that thyristor closes and has no progeny owing to the variation of external circuit, motor and current transformer are implemented to be incorporated into the power networks once more and to start.This type crowbar circuit can not realize that low-voltage passes through, and reason is that thyristor can not controlled shutdown, can only rely on external circuit oppositely, realize turn-offing.
This point has been seen by some enterprises, has changed thyristor into IGBT, IGCT, or GTO, and applied for patent.Like this, the crowbar circuit that is modified is switch freely, can adapt to the requirement that low-voltage is passed through.But, owing to need to adopt the higher IGBT of current class, IGCT or GTO, thereby cost is higher, and reliability also be cannot say for sure to demonstrate,prove.
Some enterprises are with above-mentioned IGBT, IGCT or GTO have changed the high speed contactor into, or go here and there into high speed contactor in the thyristor front, though this scheme has also realized the function that low-voltage is passed through, and reliability uprises, but still has deficiency with high costs (the high-capacity and high-speed contactor costs an arm and a leg).Therefore necessary this is solved.
The utility model content
The purpose of this utility model provides a kind of requirement that can guarantee that low-voltage is passed through, the wind turbine generator protector that the reply line voltage short time that cost is lower is again fallen in order to overcome the deficiency of existing Crowbar protective circuit.
The purpose of this utility model is achieved through the following technical solutions, a kind ofly tackle the wind turbine generator protector that the line voltage short time falls, adopt the crowbar circuit to adapt to the requirement that low-voltage is passed through, it is characterized in that the crowbar circuit that described low-voltage is passed through comprises at least one cover main thyristor and the auxiliary circuit of being made up of auxiliary triode thyristor, electric capacity and reactor, and together realize turning on and off of crowbar circuit by main thyristor and auxiliary circuit.When needs are opened, trigger main thyristor and make circuit debugging, when needs turn-off, trigger auxiliary triode thyristor, by auxiliary capacitor, auxiliary reactor is worked together, realizes that the main thyristor of before having opened turn-offs.
The beneficial effects of the utility model are: have single work owing to realize the crowbar circuit that low-voltage is passed through, and the characteristics of less action, therefore, utilize auxiliary triode thyristor, the turn-off circuit of the thyristor that auxiliary capacitor and auxiliary reactor constitute, when needs turn-off, trigger auxiliary triode thyristor, then can realize the shutoff of the thyristor before opened.Can not only effectively guarantee the requirement that low-voltage is passed through like this, and since the cost of thyristor than IGBT, IGCT or GTO are much lower, so can effectively reduce cost again, realize the purpose of this utility model.
Description of drawings:
Fig. 1 is an electrical block diagram of the present utility model.
Among the figure: 1, crowbar circuit module, 2, rectifier, 3, rotor, 4, pusher side current transformer, 5, the net side converter, 6, electrical network, 7, first electrical nodes, 8, second electrical nodes, the 9, the 3rd electrical nodes, 10, the 4th electrical nodes, T1, main thyristor, T2, auxiliary triode thyristor, C1, electric capacity, C2, electric capacity, L1, inductance, L2, reactor, R, energy consumption resistance.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, with reference to the accompanying drawings as can be seen, the utility model is a kind of wind turbine generator protector that the line voltage short time falls of tackling.He is in wind generator system, the crowbar circuit that low-voltage is passed through is set, it is characterized in that the crowbar circuit that described low-voltage is passed through comprises at least one cover main thyristor and the auxiliary circuit of being made up of auxiliary triode thyristor, electric capacity and reactor, main thyristor and auxiliary circuit are together realized turning on and off of crowbar circuit.Adopt the crowbar circuit to adapt to the requirement that low-voltage is passed through, in the crowbar circuit that described low-voltage is passed through, comprise at least one cover main thyristor T1 and the auxiliary circuit of forming by auxiliary triode thyristor T2, capacitor C 2 and reactor L2, and together realize turning on and off of crowbar circuit by main thyristor T1 and auxiliary circuit.In the electric connection line of the rotor 3 of motor and pusher side current transformer 4, be plugged with crowbar circuit module 1, rectifier 2 bypasses at crowbar circuit module 1 are provided with main thyristor T1, and main thyristor T1 bypass again is provided with the auxiliary circuit of being made up of auxiliary triode thyristor T2, capacitor C 2 and reactor L2; Main thyristor T1 is connected on first electrical nodes, 7 to second electrical nodes 8, and in the bypass that constituted of the 3rd electrical nodes 9 to the 4th electrical nodes 10, and between first electrical nodes 7 and second electrical nodes 8, be serially connected with energy consumption resistance R, between the 3rd electrical nodes 9 and the 4th electrical nodes 10, be serially connected with inductance L 1; Auxiliary triode thyristor T2 is other to be connected on second electrical nodes 8 and the 3rd electrical nodes 9 of main main thyristor T1 bypass, and capacitor C 2 is serially connected between second electrical nodes 8 and the auxiliary triode thyristor T2, and reactor L2 is serially connected between the 3rd electrical nodes 9 and the auxiliary triode thyristor T2.
When needs are opened, trigger main thyristor T1 and make circuit debugging, when needs turn-off, trigger auxiliary triode thyristor T2, by auxiliary capacitor C2, auxiliary reactor L2 works together, realizes that the main thyristor of before having opened turn-offs.When detecting needs triggering crowbar, then trigger main thyristor T1, rotor passes through rectifier, energy consumption resistance R, main thyristor T1, the inductance L 1 of wired equivalent is formed the loop, and at this moment rotor is in bypass, can't continue to the current transformer conveying capacity; When detecting trouble shooting, need to disconnect the crowbar loop, so that the wind turbine generator generating then triggers auxiliary triode thyristor T2, at this moment the auxiliary capacitor C2 that is recharged in advance, auxiliary triode thyristor T2, auxiliary reactor L2, and the main thyristor T1 that is in conducting state, formed a loop, along with the increase gradually of electric current among the auxiliary reactor L2, the electric current that flows through main thyristor T1 reduces gradually, and final the realization turn-offed.Main thyristor T1 closes and has no progeny, and the crowbar circuit has lost the bypass effect immediately, and the loop that the rotor of this circuit and motor constitutes disconnects.
Claims (3)
1. tackle the wind turbine generator protector that the line voltage short time falls for one kind, adopt the crowbar circuit to adapt to the requirement that low-voltage is passed through, it is characterized in that: the crowbar circuit that described low-voltage is passed through comprises at least one cover main thyristor and the auxiliary circuit of being made up of auxiliary triode thyristor, electric capacity and reactor, and together realizes turning on and off of crowbar circuit by main thyristor and auxiliary circuit; When needs are opened, trigger main thyristor and make circuit debugging, when needs turn-off, trigger auxiliary triode thyristor, by auxiliary capacitor, auxiliary reactor is worked together, realizes that the main thyristor of before having opened turn-offs.
2. the wind turbine generator protector that the reply line voltage short time as claimed in claim 1 is fallen, it is characterized in that: in the electric connection line of the rotor of motor and pusher side current transformer, be plugged with the crowbar circuit module, rectifier bypass at the crowbar circuit module is provided with main thyristor, and main thyristor bypass again is provided with the auxiliary circuit of being made up of auxiliary triode thyristor, electric capacity and reactor.
3. the wind turbine generator protector that the reply line voltage short time as claimed in claim 2 is fallen, it is characterized in that: main thyristor is connected on first electrical nodes to the second electrical nodes, and in the bypass that constituted of the 3rd electrical nodes to the four electrical nodes, and between first electrical nodes and second electrical nodes, be serially connected with energy consumption resistance, between the 3rd electrical nodes and the 4th electrical nodes, be serially connected with inductance; Auxiliary triode thyristor is other to be connected on second electrical nodes and the 3rd electrical nodes of main main thyristor bypass, and capacitance series is between second electrical nodes and auxiliary triode thyristor, and reactor is serially connected between the 3rd electrical nodes and the auxiliary triode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205098395U CN201766546U (en) | 2010-08-30 | 2010-08-30 | Wind generating set protector for coping with voltage dip of power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205098395U CN201766546U (en) | 2010-08-30 | 2010-08-30 | Wind generating set protector for coping with voltage dip of power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201766546U true CN201766546U (en) | 2011-03-16 |
Family
ID=43719152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205098395U Expired - Fee Related CN201766546U (en) | 2010-08-30 | 2010-08-30 | Wind generating set protector for coping with voltage dip of power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201766546U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255299A (en) * | 2011-07-21 | 2011-11-23 | 南车株洲电力机车研究所有限公司 | Method and device for actively protecting double-fed wind power generator converter |
| WO2016000220A1 (en) * | 2014-07-02 | 2016-01-07 | Ge Energy Power Conversion Technology Ltd | Overvoltage protection self-trigger circuit for double fed induction generator (dfig) wind power system |
-
2010
- 2010-08-30 CN CN2010205098395U patent/CN201766546U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255299A (en) * | 2011-07-21 | 2011-11-23 | 南车株洲电力机车研究所有限公司 | Method and device for actively protecting double-fed wind power generator converter |
| CN102255299B (en) * | 2011-07-21 | 2014-04-09 | 南车株洲电力机车研究所有限公司 | Method and device for actively protecting double-fed wind power generator converter |
| WO2016000220A1 (en) * | 2014-07-02 | 2016-01-07 | Ge Energy Power Conversion Technology Ltd | Overvoltage protection self-trigger circuit for double fed induction generator (dfig) wind power system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| El Moursi et al. | A parallel capacitor control strategy for enhanced FRT capability of DFIG | |
| CN101917156B (en) | Method and device for protecting wind generating set during electric network voltage dip in short time | |
| TWI464990B (en) | A dc chopper of doubly fed induction generator system and dc chopping method thereof | |
| CN105048497B (en) | Doubly-fed wind turbine generator low-voltage ride through method | |
| AU2010352434B2 (en) | System and method for control an electric generator | |
| CN103227477A (en) | High voltage ride through control method for double-fed wind generator | |
| CN106877301A (en) | A kind of high voltage DC breaker and test method | |
| CN101609992A (en) | Converter for low-voltage traversing double-fed wind driven generator | |
| CN201570870U (en) | LVRT (low voltage ride-through) control apparatus and wind-power generation equipment | |
| CN106877300A (en) | A kind of low-voltage direct breaker and test method | |
| CN105140963A (en) | Doubly-fed wind generator system based on fault current-limiting control and low voltage ride through method | |
| CN102904280A (en) | Device and method for traversing grid fault by double-fed wind power converter | |
| CN103337871B (en) | Wind generating set low voltage ride through circuit and corresponding control method | |
| CN102299526A (en) | Low voltage ride through (LVRT) control method and system device for doubly-fed wind generating set | |
| CN207010216U (en) | A kind of low-voltage direct breaker | |
| CN102412597A (en) | Low voltage ride through control method and device for a double-fed wind power generation system | |
| CN205070452U (en) | Double -fed type wind turbine generator system high voltage system of passing through | |
| CN206164111U (en) | Double -fed wind power generation low voltage ride through system | |
| CN102790404A (en) | Doubly-fed wind generation set with low-voltage ride-through function | |
| CN106300415B (en) | A kind of low-voltage ride-through method of brushless dual-feedback wind power generator group combination | |
| CN201766546U (en) | Wind generating set protector for coping with voltage dip of power grid | |
| CN104022529A (en) | Doubly-fed wind generator low voltage ride through control method based on improved Crowbar | |
| Heidary et al. | Wind energy generators fault Current protection: Structures survey | |
| CN201466745U (en) | Low-voltage cross-over double-fed wind power generator frequency converter | |
| CN207010215U (en) | A kind of high voltage DC breaker |
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: 20110316 Termination date: 20190830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |