CN101917156B - Method and device for protecting wind generating set during electric network voltage dip in short time - Google Patents
Method and device for protecting wind generating set during electric network voltage dip in short time Download PDFInfo
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- CN101917156B CN101917156B CN2010102666199A CN201010266619A CN101917156B CN 101917156 B CN101917156 B CN 101917156B CN 2010102666199 A CN2010102666199 A CN 2010102666199A CN 201010266619 A CN201010266619 A CN 201010266619A CN 101917156 B CN101917156 B CN 101917156B
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Abstract
The invention discloses a method and a device for protecting a wind generating set during electric network voltage dip in a short time. A crowbar circuit with low voltage ride through is set in a wind generating system and comprises at least one set of main thyristors and an auxiliary circuit which consists of an auxiliary thyristor, a capacitor and a reactor; and the main thyristors and the auxiliary circuit realize the switching-on and switching-off of the crowbar circuit together. When the crowbar circuit needs to be switched on, the main thyristors are triggered to enable the circuit to be switched on; and when the crowbar circuit needs to be switched off, the auxiliary thyristor is triggered, and the auxiliary capacitor and the auxiliary reactor work together to realize the switching-off of the main thyristors which are previously switched on. The switching-off loop of the thyristor which consists of the auxiliary thyristor, the auxiliary capacitor and the auxiliary reactor is used; and when the circuit needs to be switched off, the auxiliary thyristor is triggered so as to realize the switching-off of the thyristor which are previously switched on.
Description
Technical field
The present invention relates to a kind of line voltage control method and device of wind generator system, particularly a kind ofly tackle wind turbine generator means of defence and the device 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 is 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 through 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 accomplish 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 break off the stator of motor 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 the reverse of external circuit, realizes 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 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, and still has deficiency with high costs (the high-capacity and high-speed contactor costs an arm and a leg).Therefore necessary this is solved.
Summary of the invention
The object of the invention provides a kind of requirement that can guarantee that low-voltage is passed through, wind turbine generator means of defence and device 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 objective of the invention is to realize through following technical proposals; A kind ofly tackle the wind turbine generator means of defence that the line voltage short time falls; 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.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.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 break off the crowbar loop, so that the wind turbine generator generating; Then trigger auxiliary triode thyristor T2, the capacitor C 2 that at this moment is recharged in advance, auxiliary triode thyristor T2; Reactor L2, and the main thyristor T1 that is in conducting state have formed a loop; Along with the increase gradually of electric current among the 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 is broken off.
A kind of wind turbine generator protector that falls according to the reply line voltage short time that said method proposed is: 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.
The invention has the beneficial effects as follows: have single work owing to realize the crowbar circuit that low-voltage is passed through; And therefore the characteristics of less action, 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, the shutoff of the thyristor that then can realize before having 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 object of the invention.
Description of drawings:
Fig. 1 is an electrical block diagram of the present invention.
Among the figure: 1, crowbar circuit module, 2, rectifier, 3, rotor, 4, the 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
To combine accompanying drawing and embodiment that the present invention is done further description below.
As shown in Figure 1, can find out that according to accompanying drawing the present invention is a kind of wind turbine generator means of defence and device 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.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.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 break off the crowbar loop, so that the wind turbine generator generating; Then trigger auxiliary triode thyristor T2, the capacitor C 2 that at this moment is recharged in advance, auxiliary triode thyristor T2; Reactor L2, and the main thyristor T1 that is in conducting state have formed a loop; Along with the increase gradually of electric current among the 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 is broken off.
A kind of wind turbine generator protector that falls according to the reply line voltage short time that said method proposed is: 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 T1 and the auxiliary circuit of being made up of 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 of motor 3 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 break off the crowbar loop, so that the wind turbine generator generating; Then trigger auxiliary triode thyristor T2, the auxiliary capacitor C2 that at this moment is recharged in advance, auxiliary triode thyristor T2; Auxiliary reactor L2, and the main thyristor T1 that is in conducting state have 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 is broken off.
Claims (3)
1. tackle the wind-driven generator means of defence that the line voltage short time falls for one kind; It is characterized in that: 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; Wherein, 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; Main thyristor bypass again is provided with the auxiliary circuit of being made up of auxiliary triode thyristor, electric capacity and reactor, 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; When detecting needs triggering crowbar, then trigger main thyristor, rotor passes through rectifier, energy consumption resistance, main thyristor, the inductance 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 break off the crowbar loop, so that the wind turbine generator generating; Then trigger auxiliary triode thyristor, the electric capacity that at this moment is recharged in advance, auxiliary triode thyristor; Reactor, and the main thyristor that is in conducting state have been formed a loop; Along with the increase gradually of electric current in the reactor, the electric current that flows through main thyristor reduces gradually, and final the realization turn-offed; Main thyristor closes 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 is broken off.
2. the wind turbine generator protector that falls of reply line voltage short time of tackling the wind-driven generator means of defence that the line voltage short time falls according to claim 1; 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; Wherein, 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; Main thyristor bypass again is provided with 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.
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 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 |
|---|---|---|---|
| CN2010102666199A CN101917156B (en) | 2010-08-30 | 2010-08-30 | Method and device for protecting wind generating set during electric network voltage dip in short time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102666199A CN101917156B (en) | 2010-08-30 | 2010-08-30 | Method and device for protecting wind generating set during electric network voltage dip in short time |
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| Publication Number | Publication Date |
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| CN101917156A CN101917156A (en) | 2010-12-15 |
| CN101917156B true CN101917156B (en) | 2012-11-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102223126A (en) * | 2011-06-28 | 2011-10-19 | 北京清能华福风电技术有限公司 | Variable resistor Crowbar structures for low-voltage ride-through of wind power generation and method for realizing variable resistor Crowbar structures |
| US20130057227A1 (en) * | 2011-09-01 | 2013-03-07 | Ingeteam Technology, S.A. | Method and apparatus for controlling a converter |
| CN102324755B (en) * | 2011-10-11 | 2013-07-17 | 中国矿业大学 | Low-voltage ride through control method and device for doubly-fed wind power generating system |
| CN103066580B (en) * | 2012-10-30 | 2015-09-16 | 中国科学院电工研究所 | A kind of error protection for wind energy turbine set and energy stabilization circuit |
| US10511211B1 (en) * | 2018-08-30 | 2019-12-17 | General Electric Company | Trip reduction tool for a wind turbine power system |
| CN112152215B (en) * | 2019-06-28 | 2024-05-17 | 北京金风科创风电设备有限公司 | Filter capacitor operation control device and method of converter |
| EP4084319A1 (en) * | 2021-04-30 | 2022-11-02 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | A wind power facility and method |
| AU2022266129B2 (en) * | 2021-04-30 | 2024-12-05 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | A wind power facility and method |
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