CN103033694A - Online test system, device and method of wind power generation equipment - Google Patents
Online test system, device and method of wind power generation equipment Download PDFInfo
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- CN103033694A CN103033694A CN2011103021468A CN201110302146A CN103033694A CN 103033694 A CN103033694 A CN 103033694A CN 2011103021468 A CN2011103021468 A CN 2011103021468A CN 201110302146 A CN201110302146 A CN 201110302146A CN 103033694 A CN103033694 A CN 103033694A
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Abstract
The invention relates to an online test system, a device and a method of wind power generation equipment. The online test system comprises a public supply network, wind power generation equipment and an online test device, wherein the online test device comprises a plurality of doubly-fed pulse-width modulation (PWM) converters connected in a parallel mode, one of the plurality of doubly-fed PWM converters is a host device, the others of the plurality of doubly-fed PWM converters are slave devices, the host device regulates output current of each slave device in real time to achieve current-sharing control and controls every slave device within every preset adjustment step length in the process of outputting abnormal work signal to the wind power generation equipment. According to the online test system, the device and the method of the wind power generation equipment, the wind power generation equipment can online test properties of the wind power generation equipment in the process of providing normal power supply to the public supply network. Besides, current output from the wind power generation equipment to the public supply network on the same circuit, inputting of abnormal work signal to the wind power generation equipment and test to the wind power generation equipment can be realized.
Description
Technical field
The present invention relates to Online Transaction Processing, more particularly, relate to a kind of Online Transaction Processing, device and method of wind energy generating plant.
Background technology
In the operation of power networks process, electrical network high voltage transient, electrical network shorted to earth, harmonic content can occur and become the fault such as large, because wind energy is with respect to the instability of generating electricity in thermoelectricity, the water, in the situation that electric network fault, wind energy generating plant is because self capacity limit, easily off-grid and can not continue generating.Along with the increase of wind energy generating plant capacity, this problem is also all the more obvious.Because the actual capacity of electrical network is huge, cause the wind power generation unit in the development phase model machine to be carried out above-mentioned electric network fault experimental verification very difficult, many manufacturers adopt on-the-spot method on probation, but electric network fault has very large randomness, on-the-spot trying out often takies the too much time, affects the payment of product.
The operation of power networks Characteristics Detection of wind energy generating plant mainly comprises: line voltage is symmetrical/and asymmetric, phase place is symmetrical or asymmetric, mains by harmonics voltage, harmonic current, electric network fault pass through that FRT (Fault Ride Through), line voltage transient state low pressure or high pressure saltus step and gradual fluctuation, mains frequency skew and fluctuation, grid short circuit, electrical network disconnectedly equate, test method is complicated and experimentation cost is high.
Conventional AC SOURCE (AC power supply) waveform generator is the energy uniflux, and is for the subjects of energy in bidirectional flow wind-driven generator unit for example, then helpless.
Summary of the invention
The technical problem to be solved in the present invention is, wind energy generating plant is detected online in wind energy generating plant carries out the process of normal power supply to public electric wire net for not yet realizing in the prior art, and unrealized the enterprising sector-style of same circuit can generating set to the public electric wire net output current and to the defective of wind energy generating plant output detection signal, a kind of Online Transaction Processing, device and method of wind energy generating plant is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of Online Transaction Processing of wind energy generating plant, it comprises public electric wire net and wind energy generating plant, is provided with online testing device between described public electric wire net and wind energy generating plant; Described online testing device comprises a plurality of double-fed PWM current transformers that are connected in parallel;
In the process of the described wind energy generating plant of arbitrary detection, one of them of described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively; Described main process equipment is used for regulating in real time each output current from machine equipment, carrying out sharing control, and in the process of described wind energy generating plant output abnormality working signal, in each default adjusting step-length, regulates the instantaneous step-length of inverter voltage.
In the Online Transaction Processing of wind energy generating plant of the present invention, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
In the Online Transaction Processing of wind energy generating plant of the present invention, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
In the Online Transaction Processing of wind energy generating plant of the present invention, described main process equipment is used for receiving in real time all from the size of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers are carried out sharing control; Wherein, when at least one during greater than default threshold value, stops all from the machine equipment output current from the output current of machine equipment.
In the Online Transaction Processing of wind energy generating plant of the present invention, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
In the Online Transaction Processing of wind energy generating plant of the present invention, when powering in system, each double-fed PWM current transformer sends respectively the pulse signal of different length; Described main process equipment is the longest double-fed PWM current transformer of pulse signal of output.
According to another aspect of the present invention, provide a kind of online testing device, it is used for being connected between public electric wire net and the wind energy generating plant so that described wind energy generating plant is detected online, and it comprises a plurality of double-fed PWM current transformers that are connected in parallel;
In the process of the described wind energy generating plant of arbitrary detection, one of them of described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively; Described main process equipment is used for regulating in real time each output current from machine equipment, carrying out sharing control, and to described wind energy generating plant output abnormality working signal the time, in each default adjusting step-length, regulates the instantaneous step-length of inverter voltage.
In online testing device of the present invention, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
In online testing device of the present invention, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
In online testing device of the present invention, described main process equipment is used for receiving in real time all from sizes of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers is carried out sharing control; Wherein, when at least one during greater than default threshold value, stops all from the output current of machine equipment from the output current of machine equipment.
In online testing device of the present invention, in online testing device of the present invention, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
According to a further aspect of the invention, a kind of on-line testing method of wind energy generating plant is provided, it uses online testing device to be connected between public electric wire net and the wind energy generating plant, so that described wind energy generating plant is detected online, described online testing device comprises a plurality of double-fed PWM current transformers that are connected in parallel; Said method comprising the steps of:
When powering on, one of them that determine described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is respectively from machine equipment;
Described main process equipment is used for receiving in real time all from sizes of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers is carried out sharing control;
In the process of described wind energy generating plant output abnormality working signal, in each default adjusting step-length, regulate the instantaneous step-length of inverter voltage.
In the on-line testing method of wind energy generating plant of the present invention, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
In the on-line testing method of wind energy generating plant of the present invention, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
In the on-line testing method of wind energy generating plant of the present invention, when at least one during greater than default threshold value, stops all from the machine equipment output current from the output current of machine equipment.
In the on-line testing method of wind energy generating plant of the present invention, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
Implement Online Transaction Processing, the device and method of wind energy generating plant of the present invention, has following beneficial effect: by between public electric wire net and wind energy generating plant, making up online testing device, can so that wind energy generating plant in the process of public electric wire net normal power supply, the characteristic of wind energy generating plant is detected online; And can realize generating set to export to the electric current of public electric wire net in the enterprising sector-style of same circuit, and to wind energy generating plant input abnormal work signal, wind energy generating plant is detected, thereby realize by simulating grid high voltage transient and harmonic voltage, wind energy generating plant is effectively detected, particularly to current transformer in the wind energy generating plant etc. in the situation that electrical network high voltage transient and exist the ruuning situation of harmonic voltage to carry out effective detection.Further, because this online testing device is formed in parallel by a plurality of double-fed PWM current transformers, namely adopt the current transformer of the three-phase bridge PWM rectification inverter circuit with double-fed topology as electrical network characteristic generating means, mate corresponding reactor, capacitor, reach sub controlling unit, realize the simulating grid harmonic voltage, harmonic current and the saltus step of line voltage high voltage transient, test effect is equivalent to true test electrical network.Have more cost advantage with comparing with the true test electrical network of capacity.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the block diagram of the Online Transaction Processing of wind energy generating plant of the present invention;
Fig. 2 is the circuit theory diagrams of Online Transaction Processing first embodiment of wind energy generating plant shown in Figure 1;
Fig. 3 is the circuit theory diagrams of Online Transaction Processing first embodiment of wind energy generating plant shown in Figure 1;
Fig. 4 is the process flow diagram of the on-line testing method of wind energy generating plant of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, in the Online Transaction Processing of wind energy generating plant of the present invention, its main three major parts, namely public electric wire net 2, wind energy generating plant 3 and be bridged on public electric wire net 2 and wind energy generating plant 3 between be provided with online testing device 1; In this system works, wind energy generating plant 3 is in operational process, and the power supply of generation is exported to public electric wire net 2 by this online testing device 1.In addition, in order to test the performance of wind energy generating plant 3, namely detect this wind energy generating plant 3 and whether meet job requirement, by the relevant abnormal work signal of this online testing device 1 simulation, for example voltage transient high pressure skip signal or harmonic signal, and with this abnormal work signal injection in wind energy generating plant 3, thus, can realize in the process of this wind energy generating plant 3 normal operations, this wind energy generating plant 3 is detected, and the simultaneously input and output of wind energy generating plant 3 all can be carried out by same three-phase line.
For the wind energy generating plant 3 that adapts to the different capabilities size, this online testing device 1 comprises a plurality of double-fed PWM current transformers 11 that are connected in parallel; The capacity that is wind energy generating plant 3 is larger, need the quantity of double-fed PWM current transformer 11 in parallel more, otherwise the capacity of wind energy generating plant 3 is less, needs the quantity of double-fed PWM current transformer 11 in parallel fewer.
Be illustrated in figure 2 as the first embodiment of the Online Transaction Processing of wind energy generating plant shown in Figure 1, wherein, public electric wire net 2 and wind energy generating plant 3 are the three-phase input and output, and this online testing device 1 only is made of a double-fed PWM current transformer 11.This double-fed PWM current transformer 11 mainly is made of 12 switching tubes and an electric capacity, wherein, consist of a bridge arm structure and form the three-phase input and output by six switching tubes in public electric wire net 2 one sides, side at wind energy generating plant 3 consists of a bridge arm structure by other six switching tubes simultaneously, also form the three-phase input and output, and between connects electric capacity.Understandable, when this online testing device 1 was made of a plurality of double-fed PWM current transformers 11, each double-fed PWM current transformer 11 all had identical circuit structure.
Be illustrated in figure 3 as the second embodiment of the Online Transaction Processing of wind energy generating plant shown in Figure 1, wherein, this online testing device 1 mainly is made of a plurality of double-fed PWM current transformer 11 parallel connections.In the process of arbitrary detection wind energy generating plant 3, one of them of these a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively; Understandable, in the process that detects each time wind energy generating plant 3, this main process equipment can produce at random, also can be in the process that detects each time wind energy generating plant 3, by a definite double-fed PWM current transformer as main process equipment, general, can be by first double-fed PWM current transformer as main process equipment.
In a plurality of double-fed PWM current transformers that are connected in parallel, each double-fed PWM current transformer all is connected with adjacent double-fed PWM current transformer by its bypass source, and each double-fed PWM current transformer all is to communicate by the CAN bus.
When main process equipment in the process that checks each time wind energy generating plant is when producing at random, definite process of its main process equipment can for: when this online testing device 1 powers on, each double-fed PWM current transformer 11 sends the pulse of a different length, and (pulse length is relevant with the numbering of double-fed PWM current transformer 11, and the pulse length of each double-fed PWM current transformer 11 output all is different), thereby compete out main process equipment by a plurality of double-fed PWM current transformers 11, preferably, the longest double-fed PWM current transformer 11 of pulse length of output can be defined as main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively.Certainly, understandable, also can determine in a plurality of double-fed PWM current transformers 11 one of them for main process equipment by method for distinguishing, remaining be from machine equipment, as long as realization by a double-fed PWM current transformer as main control equipment.
After determining main process equipment, in the process of public electric wire net power supply or detecting in the process of wind energy generating plant 3, by main process equipment control with regulate each from the size of machine equipment output current, thereby realize sharing control at wind energy generating plant 3.Its concrete sharing control process can for: when the initialization, each current feedback that will initially export from machine equipment is to main process equipment, main process equipment can calculate the size of average current thus, then, continue the process of output current from machine equipment at each, each from the size of its output current of machine equipment Real-time Feedback to main process equipment, main process equipment judges that accordingly this size of current from the current output of machine equipment departs from the situation of the size of average current, if namely should be from the electric current of the current output of machine equipment in an error range of average current, that is to say, should be positioned at [I-δ from the electric current of the current output of machine equipment, I+ δ] when interior, think that then this size of current from the current output of machine equipment equals average current, wherein, I is assumed to the size of average current, and δ is default error amount; Otherwise main process equipment will to sending control signal from machine equipment, by the adjusting of carrying out output current from machine equipment, thereby be realized sharing control.Preferably, in specific works, when any one from the current output current of machine equipment during greater than default threshold value, main process equipment will be controlled each and stop output current from machine equipment, namely quit work.Should default threshold value be that to be connected to the thickness of the cable length of public electric wire net and cable relevant with each double-fed PWM current transformer.Preferably, this default threshold value can be 50 peaces.
In addition, when this online testing device 1 online detection wind energy generating plant 3, namely when main process equipment sends the abnormal work signal to wind energy generating plant 3, for example, when main process equipment to wind energy generating plant 3 output voltage high voltage transient skip signal or main process equipment during to wind energy generating plant 3 harmonic signal, because each action from the machine equipment saltus step can't be in full accord, also needs main process equipment that each is carried out sharing control from machine equipment.This moment this main process equipment to the process of carrying out sharing control from machine equipment can for: main process equipment on average is divided into a plurality of time periods to the duration that wind energy generating plant sends the abnormal work signal, each time period is one and regulates step-length, and the size of this adjusting step-length is relevant with voltage jump speed.In this process, when some current output currents from machine equipment are positioned at [I-δ, I+ δ] when scope is outer, main process equipment transmits control signal from machine equipment to this, use circulation D axle component to regulate the given vector D of inverter voltage axle component by this from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage, thereby regulate its output current, so that be positioned in [I-δ, I+ δ] scope.Wherein, for determining of circulation D axle component and circulation Q axle component, can be that voltage and the frequency of each slave equipment Inspection bypass source separately determined circulation D axle component and circulation Q axle component; In addition, also can be in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
This main process equipment realizes that the function that harmonic wave injects can be: 3,5,7 subharmonic phase places are adjustable, scope [0,360 °]; Harmonic phase receives on-line control; Can not suddenly change during phase adjusted, what needs were level and smooth is transitioned into new setting from old setting; Inverter cuts out rear and opens before harmonic phase automatic clear; Inverter soft start and inversion power supply stage are accepted the setting of harmonic phase; Its operating process can be: the backstage amount of setting is sent to the slave computer interface function according to communication protocol, finishes the isolation of variable by interface function; The amount of setting is decomposed into the set-point that increases progressively, in each interrupts, changes set-point; After phase-locked finishing, generate three-phase coordinate time harmonic phase place, the relation when operation between angle value, angle variable quantity, initial phase and the initial phase changing value: Θ=∑ Δ Θ+Φ.+ ΔΦ; Will be to the zero clearing of harmonic phase initial value during the inverter shutdown.
This main process equipment realizes that the function of line voltage high voltage transient saltus step output can be: voltage can jump to 850V from 690V, namely about 1.23 times; The saltus step phase place can arrange, and scope is [0,360 °]; Be to finish saltus step in the 10ms in half cycle; The longest 6000ms of high pressure duration, and can arrange arbitrarily take ms as unit on the backstage.Its operating process can be: the backstage amount of setting (leaping voltage value, high pressure bound-time, saltus step slope) is sent to the slave computer interface function according to communication protocol, finishes the isolation of variable by interface function; The saltus step sign is sent to the slave computer interface function according to communications protocol, finishes the isolation of variable by interface function; By the saltus step slope amount of setting the leaping voltage value is decomposed into added value, according to the 1ms timing, the saltus step amount is increased on the voltage target vector d axle component, and the start time rolling counters forward; After gate time arrives, voltage target vector d axle component is recovered;
Thus, by using this online testing device 1 as the bridge between public electric wire net 2 and the wind energy generating plant 3, when it can guarantee wind energy generating plant 3 to public electric wire net 2 normal power supply, can detect this wind energy generating plant 3, simultaneously, in the process of this online testing device 1 normal operation, each double-fed PWM current transformer of this online testing device 1 is carried out sharing control, thereby effectively guaranteed the normal operation of this online testing device 1, and realized rapidly response.
Fig. 4 shows the flow process of the on-line testing method of wind energy generating plant of the present invention, and the method flow process is based on system architecture shown in Figure 1, and detailed process is as follows:
S11: when this online testing device 1 powered on, one of them that determine a plurality of double-fed PWM current transformers 11 was main process equipment, and remaining double-fed PWM current transformer 11 is respectively from machine equipment; Definite process of its main process equipment can for: when this online testing device 1 powers on, each double-fed PWM current transformer 11 sends the pulse of a different length, and (pulse length is relevant with the numbering of double-fed PWM current transformer 11, and the pulse length of each double-fed PWM current transformer 11 output all is different), thereby compete out main process equipment by a plurality of double-fed PWM current transformers 11, preferably, the longest double-fed PWM current transformer 11 of pulse length of output can be defined as main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively.Certainly, understandable, also can determine in a plurality of double-fed PWM current transformers 11 one of them for main process equipment by method for distinguishing, remaining be from machine equipment, as long as realization by a double-fed PWM current transformer as main control equipment.
S12: when each received that from machine equipment start-up command also can be started shooting equipment, each sends confirmation signal to main process equipment respectively from machine equipment, and was ready to inform main process equipment.After main process equipment is received all affirmation signals that send from machine equipment, control all and begin simultaneously output current from machine equipment, and each feeds back the size of current of output from machine equipment to main process equipment, thereby main process equipment can calculate the size of average current accordingly, and the size of average current sent to from machine equipment, thus, can be according to the size of average current from machine equipment, constantly regulate its current output current, so that this current output current is positioned at the default error range of average current.Described main process equipment is used for receiving in real time all from sizes of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers is carried out sharing control; Preferably, in specific works, when any one from the current output current of machine equipment during greater than default threshold value, main process equipment will be controlled each and stop output current from machine equipment, namely quit work.Should default threshold value be that to be connected to the thickness of the cable length of public electric wire net and cable relevant with each double-fed PWM current transformer.Preferably, this default threshold value can be 50 peaces.
S13: when this online testing device 1 online detection wind energy generating plant 3, namely when main process equipment sends the abnormal work signal to wind energy generating plant 3, for example, when main process equipment to wind energy generating plant 3 output voltage high voltage transient skip signal or main process equipment during to wind energy generating plant 3 harmonic signal, because, each action from the machine equipment saltus step can't be in full accord, also needs main process equipment that each is carried out sharing control from machine equipment.This moment this main process equipment to the process of carrying out sharing control from machine equipment can for: main process equipment on average is divided into a plurality of time periods to the duration that wind energy generating plant sends the abnormal work signal, each time period is one and regulates step-length, and the size of this adjusting step-length is to be relevant with the speed of voltage jump.In this process, when some current output currents from machine equipment are positioned at [I-δ, I+ δ] when scope is outer, main process equipment transmits control signal from machine equipment to this, use circulation D axle component to regulate the given vector D of inverter voltage axle component by this from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage, thereby regulate its output current, so that be positioned in [I-δ, I+ δ] scope.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the Online Transaction Processing of a wind energy generating plant comprises public electric wire net and wind energy generating plant, it is characterized in that, is provided with online testing device between described public electric wire net and wind energy generating plant; Described online testing device comprises a plurality of double-fed PWM current transformers that are connected in parallel;
In the process of the described wind energy generating plant of arbitrary detection, one of them of described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively; Described main process equipment is used for regulating in real time each output current from machine equipment, carrying out sharing control, and in the process of described wind energy generating plant output abnormality working signal, in each default adjusting step-length, regulates the instantaneous step-length of inverter voltage.
2. the Online Transaction Processing of wind energy generating plant according to claim 1, it is characterized in that, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
3. the Online Transaction Processing of wind energy generating plant according to claim 2 is characterized in that, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
4. the Online Transaction Processing of wind energy generating plant according to claim 1, it is characterized in that, described main process equipment is used for receiving in real time all from the size of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers are carried out sharing control; Wherein, when at least one during greater than default threshold value, stops all from the machine equipment output current from the output current of machine equipment.
5. the Online Transaction Processing of wind energy generating plant according to claim 1 is characterized in that, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
6. the Online Transaction Processing of wind energy generating plant according to claim 1 is characterized in that, when powering in system, each double-fed PWM current transformer sends respectively the pulse signal of different length; Described main process equipment is the longest double-fed PWM current transformer of pulse signal of output.
7. online testing device is used for being connected between public electric wire net and the wind energy generating plant so that described wind energy generating plant is detected online, it is characterized in that, comprises a plurality of double-fed PWM current transformers that are connected in parallel;
In the process of the described wind energy generating plant of arbitrary detection, one of them of described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is from machine equipment respectively; Described main process equipment is used for regulating in real time each output current from machine equipment, carrying out sharing control, and to described wind energy generating plant output abnormality working signal the time, in each default adjusting step-length, regulates the instantaneous step-length of inverter voltage.
8. online testing device according to claim 7, it is characterized in that, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
9. online testing device according to claim 8 is characterized in that, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
10. online testing device according to claim 7, it is characterized in that, described main process equipment is used for receiving in real time all from sizes of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers is carried out sharing control; Wherein, when at least one during greater than default threshold value, stops all from the output current of machine equipment from the output current of machine equipment.
11. online testing device according to claim 7 is characterized in that, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
12. the on-line testing method of a wind energy generating plant, it is characterized in that, use online testing device to be connected between public electric wire net and the wind energy generating plant, so that described wind energy generating plant is detected online, described online testing device comprises a plurality of double-fed PWM current transformers that are connected in parallel; Said method comprising the steps of:
When powering on, one of them that determine described a plurality of double-fed PWM current transformers is main process equipment, and remaining double-fed PWM current transformer is respectively from machine equipment;
Described main process equipment is used for receiving in real time all from sizes of the output current of machine equipment feedback, regulating all from the output current of machine equipment, thereby described a plurality of double-fed PWM current transformers is carried out sharing control;
In the process of described wind energy generating plant output abnormality working signal, in each default adjusting step-length, regulate the instantaneous step-length of inverter voltage.
13. the on-line testing method of wind energy generating plant according to claim 12, it is characterized in that, in each default adjusting step-length, regulating the instantaneous step-length of inverter voltage is specially: in each default adjusting step-length, control each and use circulation D axle component to regulate the given vector D of inverter voltage axle component from machine equipment, and use circulation Q axle component to regulate the instantaneous step-length of inverter voltage.
14. the on-line testing method of wind energy generating plant according to claim 13 is characterized in that, each is from voltage and the frequency of machine equipment by detection bypass source separately, to determine circulation D axle component and circulation Q axle component; Perhaps, in the process of each communicating interrupt of main process equipment, directly by the communication assignment, determine that each is from circulation D axle component and the circulation Q axle component of machine equipment.
15. the on-line testing method of wind energy generating plant according to claim 12 is characterized in that, when at least one during greater than default threshold value, stops all from the machine equipment output current from the output current of machine equipment.
16. the on-line testing method of wind energy generating plant according to claim 12 is characterized in that, described abnormal work signal is voltage transient high pressure skip signal or harmonic signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793091A (en) * | 2015-05-13 | 2015-07-22 | 中国航空工业集团公司北京长城计量测试技术研究所 | Site test and evaluation method of doubly-fed converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104793091A (en) * | 2015-05-13 | 2015-07-22 | 中国航空工业集团公司北京长城计量测试技术研究所 | Site test and evaluation method of doubly-fed converter |
| CN109995134A (en) * | 2019-04-29 | 2019-07-09 | 漳州科华技术有限责任公司 | A kind of power supply system and its current-equalizing system and current equalizing method independently bypassed |
| CN109995134B (en) * | 2019-04-29 | 2021-04-27 | 漳州科华技术有限责任公司 | Power supply system and current equalizing system and method of independent bypass of power supply system |
| CN113759763A (en) * | 2020-06-04 | 2021-12-07 | 株式会社东海理化电机制作所 | Control device, computer-readable storage medium, and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103033694B (en) | 2015-07-22 |
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