CN102868165A - Reactive power capability estimation method for fan and wind power collection line - Google Patents
Reactive power capability estimation method for fan and wind power collection line Download PDFInfo
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Abstract
A method for estimating the reactive power capability of a fan and a wind power collection line is provided. The method comprises the following steps: detecting active power and terminal voltage of the fan; and determining the reactive power capability according to the detected active power and the terminal voltage. According to the method, the reactive power capability of the fan can be accurately estimated.
Description
Technical field
The present invention relates to wind power generation field.More particularly, relate to the reactive power capabilities method that a kind of blower fan and wind-powered electricity generation compile circuit.
Background technology
Along with the development of technology, the concern of regenerative resource and utilize degree day by day to increase, wherein, wind power generation is a kind of relatively ripe energy technology that developed.Yet the development plan that China's wind-powered electricity generation industry " is built large base, incorporated large electrical network " and Europe " dispersion online, on-site elimination " difference have the characteristics such as " on a large scale ", " high concentrating ".Intermittent wind-powered electricity generation causes voltage ripple of power network, and system short circuit capacity increases, and transient stability sexually revises, and concentrates in the access electrical network situation particularly outstanding at large-scale wind power especially.Simultaneously, the terminal quality of power supply of electrical network also can affect wind energy turbine set, and for example grid disturbance causes blower fan off-grid, wind energy turbine set off-the-line, and unbalance voltage can cause unit vibration, overheated etc.
Study wind farm grid-connected key problem in technology, be wind energy turbine set is analyzed as an integral unit access electrical network, by improving the wind farm grid-connected some stability of (being called for short PCC), improve with the performance that is incorporated into the power networks that realizes whole wind energy turbine set.
The stable most important index that PCC is ordered is voltage stability.Voltage fluctuation has directly affected the safe and stable operation of blower fan, endangers even involves the electric power networks that accesses.According to the tidal current analysis technology as can be known, the PCC voltage of ordering is affected by the reactive power of this point mainly: when consume lagging reactive power (being absorbing reactive power) too much the time voltage will descend; Otherwise, when send lagging reactive power (namely sending reactive power) too much the time voltage will rise.Reactive power dynamic equilibrium by some technology control PCC is ordered can reach the stable effect of control PCC point voltage.
Yet, in the prior art, the reactive power equilibrium that control wind energy turbine set PCC is ordered can be subject to two technology point restrictions: at first must satisfy China's Power System Reactive Power " layering and zoning " control principle, secondly must take into full account the control mechanism in wind energy turbine set reactive power source.
Current main use is concentrated reactive power compensating apparatus (for example Static VAR Compensation (SVC)) to carry out reactive power and is replenished.Concentrate reactive-load compensation equipment that the reactive power equilibrium of wind energy turbine set has been played active and effective effect, cost is high, loss is large and the defective of poor stability but also exist, and SVC and fan operation are worked poor.
Fig. 1 illustrates the topological schematic diagram that the voltage-controlled wind energy turbine set voltage of concentrating reactive power compensating apparatus to realize that PCC is ordered according to the dependence of prior art is controlled (AVC) system automatically.
As shown in Figure 1, in the wind energy turbine set AVC system according to prior art, the SVC circuit that many wind-powered electricity generations compile circuit 1-N (every wind-powered electricity generation compiles circuit and comprises a plurality of blower fans) and are provided with SVC is linked into low-voltage bus bar, voltage on the low-voltage bus bar boosts via transformer, the access high voltage bus, then access large electrical network via the PCC point by sending circuit, thereby realize wind farm grid-connected, wherein, SVC is according to the change in voltage of low-voltage bus bar and/or high voltage bus, automatically send reactive power or absorbing reactive power, thereby regulate the voltage that PCC is ordered.
Yet, there is following shortcoming according to the wind energy turbine set AVC system of prior art:
(1) will realize whole wind energy turbine set voltage stabilization, (that is, SVC), and SVC involves great expense, and has inherent loss, and but stability is not high greater than the reactive power compensating apparatus of total installation of generating capacity 30%～50% to need installing;
(2) when busbar voltage reduces, the ability that SVC sends reactive power descends, and its compensation ability becomes a square doubly decline;
(3) be unfavorable for that blower fan sends the ability of reactive power, this causes the waste in important reactive power source.
In fact, blower fan has the ability of additionally sending reactive power, but the free control of single blower fan can cause the in-fighting of wind energy turbine set reactive power, can't reach the specified control target, and the reactive power of therefore substantially not using blower fan to provide is carried out reactive power compensation.In order to reduce adopt SVC to cause expensive, can consider to realize with the blower fan group in the wind energy turbine set compensation of reactive power.Yet, because wind energy turbine set inner blower group has large, the widespread characteristics of quantity, wind speed has the randomness characteristics, so the current reactive power fan-out capability of every Fans is mutually different, and real-time change, so that in the situation of the clear and definite reactive power amount that needs, the quota of the every Fans reactive power of wind energy turbine set AVC system assignment task is difficulty particularly.
For example, if do not consider the reactive power ability that blower fan is current, and simply allow blower fan bear average reactive power task, following problem can occur:
(1) the part blower fan can't be finished the reactive power task that exceeds the quata, and the meritorious minimizing of exerting oneself occurs easily, and unit damages, and perhaps can't carry out at all;
(2) the part blower fan has larger reactive power ability, but has only utilized sub-fraction, causes waste; (3) do not consider the distribution character of trend, cause the reactive power change of current in the wind energy turbine set, can't pass out to outside the wind energy turbine set.Show as the reactive power that the part blower fan sends and absorbed by other blower fans, perhaps the reactive power sent of part blower fan can't flow out wind energy turbine set at all.
Therefore, in order to use the reactive power of blower fan, at first need to determine the reactive power ability (comprise reactive power fan-out capability and/or reactive power absorption ability, that is, the reactive power that can send and/or receive) of blower fan.Yet the reactive power ability of blower fan is difficult to determine exactly (determining especially in real time), therefore causes and can't assign the reactive power task to blower fan.In addition, as an important performance indexes of blower fan, in other occasions, also need to estimate exactly this index of reactive power ability of blower fan.Therefore, need a kind of solution that can estimate exactly the reactive power ability of blower fan.
Summary of the invention
The object of the present invention is to provide a kind of blower fan and wind-powered electricity generation to compile the reactive power capabilities method of circuit, to solve at least one top technical problem.
To achieve these goals, provide a kind of reactive power capabilities method of blower fan, comprising: detect the temperature of the current transformer of blower fan, and whether the temperature of the current transformer of definite blower fan is normal; If determine that the current transformer temperature of blower fan is undesired, the reactive power ability of then determining blower fan is zero; If determine that the current transformer temperature of blower fan is normal, then detect active power and the set end voltage of blower fan; Determine the reactive power ability according to the active power and the set end voltage that detect.
Alternatively, determine that according to the active power and the set end voltage that detect the step of reactive power ability comprises: determine the reactive power ability according to the mapping relations between predetermined reactive power ability and active power and the set end voltage.
Alternatively, the step of determining the mapping relations between reactive power ability and active power and the set end voltage comprises: (a) set end voltage with blower fan is stabilized in scheduled voltage or predetermined voltage range; (b) active power with blower fan is stabilized in the preset power value; (c) detect current transformer at blower fan and do not have reactive power ability in the situation of overcurrent.
Alternatively, the reactive power ability that detects current transformer at blower fan and do not have in the situation of overcurrent comprises: the current transformer that is guaranteeing blower fan does not detect reactive power fan-out capability and/or the reactive power absorption ability of blower fan in the limiting current situation of overcurrent.
Alternatively, change the preset power value in the step (b), execution in step (c).
Alternatively, change scheduled voltage or predetermined voltage range in the step (a), change the preset power value in the step (b), execution in step (c).
Alternatively, preset power values different in the step (b) under same scheduled voltage or predetermined voltage range is carried out match with the mapping relations between the corresponding reactive power ability that obtains in step (c), to obtain and this scheduled voltage or the corresponding performance number of this predetermined voltage range-reactive power ability relation curve.
Alternatively, described method also comprises: if determine that blower fan sends the operation alarm, the reactive power ability of then determining blower fan is zero.
Alternatively, determine that according to the mapping relations between predetermined reactive power ability and active power and the set end voltage step of reactive power ability comprises: according to corresponding with the set end voltage that detects or determine the reactive power ability with the corresponding performance number of predetermined voltage range at the set end voltage place of detecting-reactive power ability relation curve.
Alternatively, described predetermined voltage range is 90%-95%, 95%-105% or the 105%-110% of rated voltage.
Alternatively, determine that according to the mapping relations between predetermined reactive power ability and active power and the set end voltage step of reactive power ability comprises: according to determining the reactive power ability with the corresponding performance number of predetermined voltage range at the set end voltage place of detecting-reactive power ability relation curve.
Alternatively, described method also comprises: detect the temperature of the current transformer of blower fan, determine whether the temperature of current transformer of blower fan is normal; If determine that the current transformer temperature of blower fan is undesired, the reactive power ability of then determining blower fan is zero; If determine that the current transformer temperature of blower fan is normal, then carry out the active power of detection blower fan and the step of set end voltage.
Alternatively, in the mapping relations between reactive power ability and active power and set end voltage, in the situation of same active power, set end voltage is larger, then the reactive power fan-out capability in the corresponding reactive power ability is larger, and the reactive power absorption ability in the corresponding reactive power ability is less.
Another aspect of the present invention provides a kind of wind-powered electricity generation is compiled the method that the reactive power ability of circuit is estimated, comprise: (a) detect wind-powered electricity generation and compile whether the i Fans is in running status in the N Fans in the circuit, wherein, N is the natural number greater than 0, and the initial value of i is 1; (b) if determine that the i Fans is in non-operating state, the reactive power ability of then determining the i Fans is zero; (c) if determine that the i Fans is in running status, then detect model, active power and the set end voltage of i Fans; (d) determine the reactive power ability of i Fans according to model, active power and the set end voltage of the i Fans that detects; (e) so that i=i+1, and whether definite i is greater than N; (f) if i is not more than N, then return step (a); (g) if the reactive power ability addition of the described N Fans that i greater than N, then will determine.
Alternatively, step (d) comprising: determine the reactive power ability according to the mapping relations between predetermined reactive power ability and model, active power and the set end voltage.
Alternatively, the step of determining the mapping relations between reactive power ability and model, active power and the set end voltage comprises: the blower fan for every kind of model in the described N Fans is carried out following operation: (a1) set end voltage with blower fan is stabilized in predetermined voltage range; (b1) active power with blower fan is stabilized in the preset power value; (c1) detect current transformer at blower fan and do not have reactive power ability in the situation of overcurrent.
Alternatively, the reactive power ability that detects current transformer at blower fan and do not have in the situation of overcurrent comprises: the current transformer that is guaranteeing blower fan does not detect reactive power fan-out capability and/or the reactive power absorption ability of blower fan in the limiting current situation of overcurrent.
Alternatively, described method also comprises: change the preset power value in the step (b1), execution in step (c1).
Alternatively, described method also comprises: change the predetermined voltage range in the step (a1), change the preset power value in the step (b1), execution in step (c1).
Alternatively, to for every kind of model under same predetermined voltage range in the step (b1) different preset power value carry out match with the mapping relations between the corresponding reactive power ability that in step (c1), obtains, to obtain and every kind of model and the corresponding performance number of this predetermined voltage range-reactive power ability relation curve.
Alternatively, described method also comprises: if determine that the i Fans sends the operation alarm, the reactive power ability of then determining the i Fans is zero.
Alternatively, described predetermined voltage range is 90%-95%, 95%-105% or the 105%-110% of specified set end voltage.
Alternatively, determine that according to the mapping relations between predetermined reactive power ability and model, active power and the set end voltage step of reactive power ability comprises: according to determining the reactive power ability with the model of detection and the corresponding performance number of predetermined voltage range at set end voltage place-reactive power ability relation curve.
Alternatively, in the mapping relations between reactive power ability and model, active power and set end voltage, in the situation of same model and same active power, set end voltage is larger, then the reactive power fan-out capability in the corresponding reactive power ability is larger, and the reactive power absorption ability in the corresponding reactive power ability is less.
Alternatively, step (c) also comprises: if determine that the i Fans is in running status, then whether the temperature of the current transformer of definite i Fans is normal; If determine that the current transformer temperature of i Fans is undesired, the reactive power ability of then determining the i Fans is zero; If determine that the current transformer temperature of i Fans is normal, then carry out the step of the model, active power and the set end voltage that detect the i Fans.
Alternatively, under predetermined set end voltage, obtain the mapping relations between a plurality of active power and the reactive power ability, the mode by match obtains the mapping relations between active power and the reactive power ability.
Reactive power capabilities method according to blower fan of the present invention, by characteristic and the operating condition based on classification, can accurately estimate in real time the reactive power ability of blower fan, thereby the user that can make blower fan obtains the reactive power ability that blower fan and wind-powered electricity generation compile circuit exactly, to carry out various application.
Will be in ensuing description part set forth the present invention other aspect and/or advantage, some will be clearly by describing, and perhaps can learn through enforcement of the present invention.
Description of drawings
By the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, characteristics and advantage will become apparent, wherein:
Fig. 1 illustrates the topological schematic diagram that the voltage-controlled wind energy turbine set voltage of concentrating reactive power compensating apparatus to realize that PCC is ordered according to the dependence of prior art is controlled (AVC) system automatically;
Fig. 2 illustrates the flow chart of the method for the reactive power ability of estimating according to an embodiment of the invention blower fan;
Fig. 3 illustrates the flow chart according to the method for the mapping relations between the active power of obtaining blower fan of exemplary embodiment of the present invention and set end voltage and the reactive power ability;
Fig. 4 A and Fig. 4 B are illustrated in the active power of blower fan under the different set end voltages and the example of the mapping relations curve between the reactive power ability;
Fig. 4 C illustrates an example determining the reactive power ability according to the mapping relations curve between active power and the reactive power ability;
Fig. 5 illustrates and according to exemplary embodiment of the present invention wind-powered electricity generation is compiled the flow chart of the method that the reactive power ability of circuit estimates.
Embodiment
Now, describe more fully with reference to the accompanying drawings different example embodiment, run through the description to accompanying drawing, identical label represents identical assembly.
Fig. 2 illustrates the flow chart of the method for the reactive power ability of estimating according to an embodiment of the invention blower fan.
In step 201, detect the temperature of the current transformer of blower fan, and the temperature of the current transformer of definite blower fan whether normal (for example, too high or too low for temperature).Should be appreciated that the normal operating temperature of current transformer is its oneself a performance parameter, can there are differences according to the difference of model.
If determine that in step 201 the current transformer temperature of blower fan is undesired, then determine that in step 202 the reactive power ability of blower fan is zero.
If determine that in step 201 the current transformer temperature of blower fan is normal, then in step 203, detect active power and the set end voltage of blower fan.
In step 204, determine the reactive power ability according to active power and the set end voltage of the blower fan that detects.
Specifically, determine the reactive power ability according to the mapping relations between pre-stored active power and set end voltage and the reactive power ability.
Fig. 3 illustrates the flow chart according to the method for the mapping relations between the active power of obtaining blower fan of exemplary embodiment of the present invention and set end voltage and the reactive power ability.
In step 301, the set end voltage of blower fan is stabilized in scheduled voltage;
In step 302, the active power of blower fan is stabilized in the preset power value;
In step 303, detect current transformer at blower fan and do not have the reactive power ability in the situation of overcurrent.Specifically, do not detect reactive power fan-out capability and absorbability in the limiting current situation of overcurrent at the current transformer that guarantees blower fan, thereby obtain indicating reactive power fan-out capability and/or the reactive power absorption ability of reactive power ability.Should be appreciated that the reactive power fan-out capability represents the maximum reactive power that blower fan can be exported.The reactive power absorption ability represents the maximum reactive power that blower fan can absorb.
For at least one scheduled voltage execution in step 301, use different active power execution in step 302 at each predetermined voltage, thereby obtain under at least one predetermined voltage the mapping relations between different active power and the reactive power ability in step 303.
Preferably, in identical scheduled voltage situation, at first obtain the mapping relations between a plurality of active power and the reactive power ability, then the mapping relations that obtain are carried out match and obtained the active power of blower fan and the mapping relations between the reactive power ability.The mapping relations that obtain by above-mentioned match can be active power-reactive power ability relation (PQ) curves.At this moment, in step 204, can utilize the active power of detection, from obtaining the reactive power ability with the corresponding PQ curve of set end voltage that detects.
In another embodiment, above-described scheduled voltage is predetermined voltage range.In other words, in step 301, the set end voltage of blower fan is stabilized in predetermined voltage range.This is to have difficulty because the set end voltage of blower fan is stabilized in a fixing value, and within the specific limits set end voltage, little with the corresponding reactive power capacity variation of predetermined active power, less on the testing result impact.Therefore, can be not for each set end voltage but determine mapping relations between active power and the reactive power ability for different set end voltage scope (that is, predetermined voltage range).
The width of this preset range can be according to the model of blower fan or required precision and is different.In one example, the width of this preset range can be the 1%-10% of the specified set end voltage of blower fan.Preferably, the width of this preset range be blower fan specified set end voltage 5%.
For example, predetermined voltage range can be 90%-95%, 95%-105%, the 105%-110% of specified set end voltage.
In addition, for the blower fan of different model, above-mentioned mapping relations are different.Can be for the blower fan of different model, carry out the above-mentioned method of describing based on Fig. 3, obtain the active power of blower fan of different model and the mapping relations between set end voltage and the reactive power ability.Also namely, the blower fan of different model from different scheduled voltages or the corresponding PQ curve of predetermined voltage range.
Fig. 4 A and Fig. 4 B are illustrated in the active power of blower fan under the different set end voltages and the example of the mapping relations curve between the reactive power ability (that is, PQ curve).
In Fig. 4 A and Fig. 4 B, the transverse axis of curve chart represents reactive power, and the longitudinal axis of curve chart represents active power.The positive coordinate of transverse axis represents that partly the reactive power (that is, the reactive power fan-out capability) that can export, the negative coordinate of transverse axis partly represent the reactive power (that is, reactive power absorption ability) that can absorb.
Shown in Fig. 4 A, PQ curve 401 is illustrated in the percentage range [95% that above-mentioned predetermined voltage range is specified set end voltage, 105%) the PQ curve the time, PQ curve 402 be illustrated in the percentage range that above-mentioned predetermined voltage range is specified set end voltage [105%, 110%) time the PQ curve.
Shown in Fig. 4 B, PQ curve 403 be illustrated in the percentage range that above-mentioned predetermined voltage range is specified set end voltage [90%, 95%) time the PQ curve.
Can determine that by the PQ curve shown in Fig. 4 A and Fig. 4 B along with intermediate value or the end-point voltage increase of scheduled voltage or predetermined voltage range, the PQ curve moves right; Along with intermediate value or the end-point voltage of scheduled voltage or predetermined voltage range reduces, the PQ curve is moved to the left.In other words, under identical active power, intermediate value or the end-point voltage of scheduled voltage or predetermined voltage range are larger, and the reactive power fan-out capability is larger, and the reactive power absorption ability is less.
Fig. 4 C illustrates an example determining the reactive power ability according to the PQ curve.
Shown in Fig. 4 C, when the active power that detects is P1, can determine reactive power fan-out capability Q1 and absorbability Q2 by the PQ curve.
In another embodiment, comprise also in step 201 whether definite blower fan sends the operation alarm.If the temperature of the current transformer of blower fan is undesired and/or blower fan sends the operation alarm, then determine that in step 202 the reactive power ability of blower fan is zero.
In another embodiment, do not comprise step 201 and 202 in the method shown in Figure 2.
In another embodiment, can obtain the reactive power fan-out capability of blower fan and at least one and the relation of active power in the absorbability.
Fig. 5 illustrates and according to exemplary embodiment of the present invention a wind-powered electricity generation is compiled the flow chart of the method that the reactive power ability of circuit estimates.
In wind energy turbine set, blower fan is divided into a plurality of groups, and every group of blower fan forms a wind-powered electricity generation and compile circuit.
In step 501, detect whether i (initial value of i is 1) Fans is in running status in N (N is the natural number greater than the 0) Fans that is connected to wind-powered electricity generation and compiles circuit.
If determine that the i Fans is in non-operating state, then in step 502, the reactive power ability of determining the i Fans is zero.
Be in running status if determine the i Fans, then in step 503, determine whether the temperature of current transformer of i Fans is normal.
If determine that in step 503 the current transformer temperature of i Fans is undesired, then determine that in step 504 the reactive power ability of i Fans is zero.
If determine that in step 503 the current transformer temperature of i Fans is normal, then in step 505, detect model, active power and the set end voltage of i Fans.
In step 506, determine the reactive power ability of i Fans according to model, active power and the set end voltage of the i Fans that detects.
Specifically, determine the reactive power ability of i Fans according to the mapping relations of predetermined model, active power and set end voltage and reactive power ability.For the blower fan of every kind of model in the N Fans, can be according to the top mapping relations of determining active power and set end voltage and reactive power ability based on the described method of Fig. 3.
Subsequently, in step 507, so that i=i+1, and whether definite i is greater than N.
If i is not more than N, then return step 501.
If i greater than N, then carry out step 508.
In step 508, with the reactive power ability addition of described N Fans, thereby obtain the reactive power ability that the whole piece wind-powered electricity generation compiles circuit.
Should be appreciated that, when the reactive power ability only represents the reactive power fan-out capability, with the reactive power fan-out capability addition of described N Fans; When the reactive power ability only represents the reactive power absorption ability, with the reactive power absorption ability addition of described N Fans; When the reactive power ability represents reactive power fan-out capability and reactive power absorption ability, with the reactive power fan-out capability addition of described N Fans, and with the reactive power absorption ability addition of described N Fans.
In another embodiment, do not comprise step 503 and 504 in the method shown in Figure 5, but when definite i Fans is in running status, execution in step 505.
In another embodiment, comprise also in step 501 whether definite blower fan sends the operation alarm.If the temperature of the current transformer of blower fan is undesired and/or blower fan sends the operation alarm, then determine that in step 502 the reactive power ability of blower fan is zero.
According to the reactive power capabilities method of blower fan of the present invention, can accurately estimate the reactive power ability of blower fan, thereby can make the user of blower fan obtain exactly the reactive power ability of blower fan, to carry out various application.
Although specifically shown with reference to its exemplary embodiment and described the present invention, but it should be appreciated by those skilled in the art, in the situation that does not break away from the spirit and scope of the present invention that claim limits, can carry out various changes on form and the details to it.
Claims (24)
1. the reactive power capabilities method of a blower fan comprises:
Detect active power and the set end voltage of blower fan;
Determine the reactive power ability according to the active power and the set end voltage that detect.
2. method according to claim 1, wherein, determine that according to the active power and the set end voltage that detect the step of reactive power ability comprises: determine the reactive power ability according to the mapping relations between predetermined reactive power ability and active power and the set end voltage.
3. method according to claim 1, wherein, determine that the step of the mapping relations between reactive power ability and active power and the set end voltage comprises:
(a) set end voltage with blower fan is stabilized in predetermined voltage range;
(b) active power with blower fan is stabilized in the preset power value;
(c) detect current transformer at blower fan and do not have reactive power ability in the situation of overcurrent.
4. method according to claim 3, wherein, the reactive power ability that detects current transformer at blower fan and do not have in the situation of overcurrent comprises: the current transformer that is guaranteeing blower fan does not detect reactive power fan-out capability and/or the reactive power absorption ability of blower fan in the limiting current situation of overcurrent.
5. method according to claim 3 also comprises: change the preset power value in the step (b), execution in step (c).
6. method according to claim 3 also comprises: change the predetermined voltage range in the step (a), change the preset power value in the step (b), execution in step (c).
7. according to claim 5 or 6 described methods, also comprise: preset power values different in the step (b) under same predetermined voltage range is carried out match with the mapping relations between the corresponding reactive power ability that obtains in step (c), to obtain and the corresponding performance number of this predetermined voltage range-reactive power ability relation curve.
8. method according to claim 1 also comprises: if determine that blower fan sends the operation alarm, the reactive power ability of then determining blower fan is zero.
9. method according to claim 3, wherein, described predetermined voltage range is 90%-95%, 95%-105% or the 105%-110% of specified set end voltage.
10. method according to claim 7, wherein, determine that according to the mapping relations between predetermined reactive power ability and active power and the set end voltage step of reactive power ability comprises: according to determining the reactive power ability with the corresponding performance number of predetermined voltage range at the set end voltage place of detecting-reactive power ability relation curve.
11. method according to claim 1 also comprises:
Detect the temperature of the current transformer of blower fan, determine whether the temperature of current transformer of blower fan is normal;
If determine that the current transformer temperature of blower fan is undesired, the reactive power ability of then determining blower fan is zero;
If determine that the current transformer temperature of blower fan is normal, then carry out the active power of detection blower fan and the step of set end voltage.
12. method according to claim 2, wherein, in the mapping relations between reactive power ability and active power and set end voltage, in the situation of same active power, set end voltage is larger, then the reactive power fan-out capability in the corresponding reactive power ability is larger, and the reactive power absorption ability in the corresponding reactive power ability is less.
13. one kind is compiled the method that the reactive power ability of circuit is estimated to wind-powered electricity generation, comprising:
(a) detect wind-powered electricity generation and compile whether the i Fans is in running status in the N Fans in the circuit, wherein, N is the natural number greater than 0, and the initial value of i is 1;
(b) if determine that the i Fans is in non-operating state, the reactive power ability of then determining the i Fans is zero;
(c) if determine that the i Fans is in running status, then detect model, active power and the set end voltage of i Fans;
(d) determine the reactive power ability of i Fans according to model, active power and the set end voltage of the i Fans that detects;
(e) so that i=i+1, and whether definite i is greater than N;
(f) if i is not more than N, then return step (a);
(g) if the reactive power ability addition of the described N Fans that i greater than N, then will determine.
14. method according to claim 13, wherein, step (d) comprising: determine the reactive power ability according to the mapping relations between predetermined reactive power ability and model, active power and the set end voltage.
15. method according to claim 14, wherein, determine that the step of the mapping relations between reactive power ability and model, active power and the set end voltage comprises: the blower fan for every kind of model in the described N Fans is carried out following operation:
(a1) set end voltage with blower fan is stabilized in predetermined voltage range;
(b1) active power with blower fan is stabilized in the preset power value;
(c1) detect current transformer at blower fan and do not have reactive power ability in the situation of overcurrent.
16. method according to claim 15, wherein, the reactive power ability that detects current transformer at blower fan and do not have in the situation of overcurrent comprises: the current transformer that is guaranteeing blower fan does not detect reactive power fan-out capability and/or the reactive power absorption ability of blower fan in the limiting current situation of overcurrent.
17. method according to claim 15 also comprises: change the preset power value in the step (b1), execution in step (c1).
18. method according to claim 15 also comprises: change the predetermined voltage range in the step (a1), change the preset power value in the step (b1), execution in step (c1).
19. according to claim 17 or 18 described methods, wherein, to for every kind of model under same predetermined voltage range in the step (b1) different preset power value carry out match with the mapping relations between the corresponding reactive power ability that in step (c1), obtains, to obtain and every kind of model and the corresponding performance number of this predetermined voltage range-reactive power ability relation curve.
20. method according to claim 13 also comprises: if determine that the i Fans sends the operation alarm, the reactive power ability of then determining the i Fans is zero.
21. method according to claim 15, wherein, described predetermined voltage range is 90%-95%, 95%-105% or the 105%-110% of specified set end voltage.
22. method according to claim 19, wherein, determine that according to the mapping relations between predetermined reactive power ability and model, active power and the set end voltage step of reactive power ability comprises: according to determining the reactive power ability with the model of detection and the corresponding performance number of predetermined voltage range at set end voltage place-reactive power ability relation curve.
23. method according to claim 14, wherein, in the mapping relations between reactive power ability and model, active power and set end voltage, in the situation of same model and same active power, set end voltage is larger, then the reactive power fan-out capability in the corresponding reactive power ability is larger, and the reactive power absorption ability in the corresponding reactive power ability is less.
24. method according to claim 13, wherein, step (c) also comprises:
If determine that the i Fans is in running status, then whether the temperature of the current transformer of definite i Fans is normal;
If determine that the current transformer temperature of i Fans is undesired, the reactive power ability of then determining the i Fans is zero;
If determine that the current transformer temperature of i Fans is normal, then carry out the step of the model, active power and the set end voltage that detect the i Fans.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595058A (en) * | 2013-10-09 | 2014-02-19 | 马钢(集团)控股有限公司 | Method for determining capacity of reactive power compensation device of refining furnace |
| CN104283210A (en) * | 2014-08-29 | 2015-01-14 | 清华大学 | Two-stage distributed simulation method for wind electricity collection area based on distributed load flow calculation |
| CN109683111A (en) * | 2017-10-19 | 2019-04-26 | 北京金风科创风电设备有限公司 | Current capacity calculation method and device for converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080150283A1 (en) * | 2006-12-22 | 2008-06-26 | Ingeteam, S.A. | Reactive power control for operating a wind farm |
| CN102354992A (en) * | 2011-09-30 | 2012-02-15 | 北京四方继保自动化股份有限公司 | Reactive-power control method of wind power field |
| CN102882229A (en) * | 2012-09-21 | 2013-01-16 | 北京金风科创风电设备有限公司 | Automatic control system for dynamic voltage of wind power plant |
| CN102916433A (en) * | 2012-09-21 | 2013-02-06 | 北京金风科创风电设备有限公司 | Reactive power task allocation method for fan group |
-
2012
- 2012-09-21 CN CN201210355726.8A patent/CN102868165B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080150283A1 (en) * | 2006-12-22 | 2008-06-26 | Ingeteam, S.A. | Reactive power control for operating a wind farm |
| CN102354992A (en) * | 2011-09-30 | 2012-02-15 | 北京四方继保自动化股份有限公司 | Reactive-power control method of wind power field |
| CN102882229A (en) * | 2012-09-21 | 2013-01-16 | 北京金风科创风电设备有限公司 | Automatic control system for dynamic voltage of wind power plant |
| CN102916433A (en) * | 2012-09-21 | 2013-02-06 | 北京金风科创风电设备有限公司 | Reactive power task allocation method for fan group |
Non-Patent Citations (1)
| Title |
|---|
| 申洪等: "变速恒频风力发电机组的无功功率极限", 《电网技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595058A (en) * | 2013-10-09 | 2014-02-19 | 马钢(集团)控股有限公司 | Method for determining capacity of reactive power compensation device of refining furnace |
| CN104283210A (en) * | 2014-08-29 | 2015-01-14 | 清华大学 | Two-stage distributed simulation method for wind electricity collection area based on distributed load flow calculation |
| CN104283210B (en) * | 2014-08-29 | 2016-06-29 | 清华大学 | Based on the two-stage distributed emulation mode of wind-powered electricity generation collection region that Distributed Power Flow calculates |
| CN109683111A (en) * | 2017-10-19 | 2019-04-26 | 北京金风科创风电设备有限公司 | Current capacity calculation method and device for converter |
| CN109683111B (en) * | 2017-10-19 | 2020-10-16 | 北京金风科创风电设备有限公司 | Current capacity calculation method and device for converter |
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Effective date of registration: 20160121 Address after: 100176 Beijing economic and Technological Development Zone, Beijing, Kangding street, No. 19, No. Patentee after: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd Patentee after: State Grid Xinyuan Zhangjiakou Scenery Storage Demonstration Power Plant Co., Ltd. Address before: 100176 Beijing economic and Technological Development Zone, Beijing, Kangding street, No. 19, No. Patentee before: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd |