CN103138289B - Real-time digital simulation modeling method of high permeability wind power plant - Google Patents
Real-time digital simulation modeling method of high permeability wind power plant Download PDFInfo
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- CN103138289B CN103138289B CN201210444401.7A CN201210444401A CN103138289B CN 103138289 B CN103138289 B CN 103138289B CN 201210444401 A CN201210444401 A CN 201210444401A CN 103138289 B CN103138289 B CN 103138289B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005094 computer simulation Methods 0.000 title claims abstract description 11
- 230000035699 permeability Effects 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 49
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The invention provides a real-time digital simulation modeling method of a high permeability wind power plant. The wind power plant comprises at least two wind power machine groups, wherein each wind power machine group comprises a wind speed model (1), a wind driven generator (2), a grid-side converter (3), a rotor side converter (4), a converter control circuit (5), a rotor protective circuit (6), a rotor circuit starting circuit (7), a failure period control circuit (8), a crowbar circuit (10), a stator disconnector (11), and a connector converter (12). One end of the failure period control circuit (8) is connected with a feeder line voltage, the other end of the failure period control circuit (8) is connected with the converter control circuit (5) and the crowbar circuit (10), and therefore the feeder line voltage inside the wind power machine groups is measured, and operation in the failure period of the wind power machine groups is controlled. The real-time digital simulation modeling method of the high permeability wind power plant is capable of studying the problems of the influence of the wind power plant on system power grid stability in a stable state, the interactive influence among different machine groups, the influence on system protection in the failure period, and the like.
Description
Technical field
The present invention relates to technical field of wind power generation, be specifically related to a kind of method of real-timedigital simulation modeling of high permeability wind energy turbine set.
Background technology
Wind power generation is fast-developing in recent years, and along with the continuous expansion of wind power generation installed capacity, wind generator system is also increasing on the impact of electrical network, so this novel energy of research wind power generation just seems very necessary to the impact of electric power system.The simulation study that simulation software carries out wind power generation is a kind of low cost and highly effective means.On emulation tool, how to simulate the truth of large-scale wind power field better, such as influence each other between a group of planes, wind speed and low voltage crossing characteristic etc., become the problem that everybody extremely pays close attention to.
Influencing each other between a group of planes becomes the large problem that present wind energy turbine set runs into.When a part wind-powered electricity generation group of planes because when fault off-grid runs, a residue wind-powered electricity generation group of planes may because of grid-connected point voltage fluctuation off-grid.In addition, low voltage crossing problem is also the study hotspot of wind power generation field.When electrical network generation Voltage Drop, if the low voltage ride-through capability of blower fan is not up to standard, a large amount of blower fan will be there is and cut machine accident, the significantly change of system load flow can be caused, even can cause large-area power-cuts.So research there is low voltage ride-through capability the different group of planes of wind energy turbine set between the major issue such as to influence each other just need a kind of effectively based on the modeling method of large-scale wind power field.
Summary of the invention
The method of the real-timedigital simulation modeling of a kind of high permeability wind energy turbine set of the present invention, described wind energy turbine set comprises at least two wind-powered electricity generation group of planes, and each described wind-powered electricity generation group of planes comprises control circuit 8, crowbar circuit 10, stator circuit breaker 11 and interface transformer 12 between Wind speed model 1, wind-driven generator 2, net side converter 3, rotor-side converter 4, current transformer control circuit 5, rotor protection circuit 6, rotor circuit start-up circuit 7, age at failure;
Described Wind speed model 1, near wind-driven generator 2, simulates different wind regime;
Between described age at failure, control circuit 8 one end is connected with feeder voltage, and the other end connects described converter control circuit 5 and described crowbar circuit 10, monitors the described feeder voltage in a described wind-powered electricity generation group of planes, controls the operation between described wind-powered electricity generation group of planes age at failure;
Described rotor protection circuit 6 one end is connected with described wind-driven generator 2, and the other end is connected with described feeder voltage by described rotor protection circuit starting circuit 7;
Net side converter 3 and described rotor-side converter 4 described in described converter control circuit 5 control connection;
Described rotor-side converter 4 is connected with the rotor of described crowbar circuit 10 with described wind-driven generator 2;
Described stator circuit breaker 11 is connected with the stator of described wind-driven generator 2;
Described interface transformer 12 is connected with stator circuit breaker 11 and electrical network.
In first preferred embodiment provided by the invention: the type of described wind-driven generator 2 comprises double-fed, mouse-cage type and direct-driving type.
In second preferred embodiment provided by the invention: the wind regime that described Wind speed model 1 is simulated comprises: basic wind, fitful wind, gradual change wind and RANDOM WIND.
In 3rd preferred embodiment provided by the invention: described rotor protection circuit starting circuit 7 is all connected with described feeder voltage with one end of control circuit 8 between described age at failure; using described feeder voltage as enabling signal; feeder voltage described in control circuit 8 continuous surveillance between age at failure; described feeder voltage is 35KV feeder voltage
Control procedure between age at failure comprises:
Control circuit 8 Real-Time Monitoring feeder voltage drop range between described age at failure:
Described drop range exceedes threshold value for the moment, closes described rotor-side converter 4, improves the reactive power that described net side converter 3 sends;
When described drop range exceedes threshold value two, close described rotor-side converter 4, improve the reactive power that described net side converter 3 sends, described rotor protection circuit starting circuit 7 starts described rotor protection circuit 6, share the meritorious surplus of rotor-side, prevent described wind-driven generator 2 rotating speed too high;
When described drop range exceedes threshold value three; close described rotor-side converter 4; improve the reactive power that described net side converter 3 sends; described rotor protection circuit starting circuit 7 starts described rotor protection circuit 6; between described age at failure, control circuit 8 sends control signal and controls described stator circuit breaker 11 and disconnect; the stator of described wind-driven generator 2 is kept being connected by resistive element with electrical network, the stator current between age at failure is decayed rapidly.
In 4th preferred embodiment provided by the invention: described rotor protection circuit 6 comprises uncontrollable bridge rectifier, turn-off thyristor and resistance.
In 5th preferred embodiment provided by the invention: the grid side electric current doubly being taken advantage of interface transformer 12 by programming realization, thus change the size that a wind-powered electricity generation group of planes sends power.
In 6th preferred embodiment provided by the invention: control circuit 8 Real-Time Monitoring feeder voltage drop range between described age at failure, whether described drop range is no more than threshold value for the moment, detect control circuit 8 between described age at failure and recover, be, without operation, no, recover control circuit 8 between described age at failure.
In 7th preferred embodiment provided by the invention: between described recovery described age at failure, the process of control circuit 8 comprises: excise described rotor protection circuit 6, send control signal and close described stator circuit breaker 11, recover normal condition.
In 8th preferred embodiment provided by the invention: a described wind-powered electricity generation group of planes also comprises the DC bus braking circuit be connected with DC bus, when described drop range exceedes described threshold value two or described threshold value three, operation can replace with: drop into described DC bus braking circuit and limit the rising of described DC bus-bar voltage.
In 9th preferred embodiment provided by the invention: described wind-powered electricity generation cluster also comprises the low voltage ride through control circuit 9 of the grid-connected point voltage of a monitoring wind-powered electricity generation group of planes, described low voltage ride through control circuit 9 comprise control the grid-connected or off-grid of a wind-powered electricity generation group of planes grid-connected/off-grid switch, when judging wind energy turbine set fault, process that is grid-connected or off-grid comprises:
Start timer when fault starts and start timing, the time quantum that described timer obtains is input in low-voltage crossing iunction for curve, obtain reference voltage level, the grid-connected point voltage of a described wind-powered electricity generation group of planes is compared in real time with described reference voltage level, if the grid-connected point voltage of a described wind-powered electricity generation group of planes is higher than described reference voltage level, described grid-connected/off-grid switch opens, described wind-powered electricity generation group of planes off-grid; If the grid-connected point voltage of a described wind-powered electricity generation group of planes is lower than this reference voltage level, described grid-connected/off-grid switch remains closed, a described wind-powered electricity generation group of planes keeps grid-connected.
In tenth preferred embodiment provided by the invention: described time quantum, according to the matching of wind energy turbine set access electric power network technique regulation, is input to the voltage reference value of correspondence on low voltage crossing curve specify for described wind energy turbine set access electric power network technique that obtains in described low-voltage crossing iunction for curve by described low-voltage crossing iunction for curve.
The beneficial effect of the method for the real-timedigital simulation modeling of a kind of high permeability wind energy turbine set provided by the invention comprises:
1, the real working condition of large-scale wind power field can be simulated, a different group of planes can export controlled power, between age at failure, there is low voltage ride-through function, when can study stable state wind energy turbine set between the impact of system grid stability, a different group of planes influence each other and fault time on problems such as the impacts of system protection;
2, the low voltage crossing curve that national standard requires is achieved, and fall situation according to line voltage difference and formulated low voltage traversing control method, method has good transplantability and replaceability, and the researcher controlled for the Wind turbines between research age at failure provides a platform.
Accompanying drawing explanation
Be illustrated in figure 1 the structural representation of the embodiment of the real-timedigital simulation modeling of a kind of high permeability wind energy turbine set provided by the invention;
Control flow chart between the real-timedigital simulation modeling age at failure being illustrated in figure 2 a kind of high permeability wind energy turbine set provided by the invention;
The flow chart of grid-connected or off-grid when being illustrated in figure 3 judgement wind energy turbine set fault provided by the invention;
Be illustrated in figure 4 the technical stipulation schematic diagram of wind-powered electricity generation group of planes access electrical network.
In figure: 1 is Wind speed model; 2 is wind-driven generator; 3 is net side converter; 4 is rotor-side converter; 5 is current transformer control circuit; 6 is rotor protection circuit; 7 is rotor circuit start-up circuit; 8 is control circuit between age at failure; 9 is low voltage ride through control circuit; 10 is crowbar circuit; 11 is stator circuit breaker; 12 is interface transformer.
Embodiment
The invention provides a kind of method of real-timedigital simulation modeling of high permeability wind energy turbine set, this wind energy turbine set comprises at least two wind-powered electricity generation group of planes, the ruuning situation of the Steady state and transient state of large-scale wind power field can be simulated, be used for research wind speed change etc. between irregular operating state and age at failure wind energy turbine set short circuit characteristic and electrical network thereof and wind turbine group influence each other, wherein, each wind-powered electricity generation group of planes comprises Wind speed model 1, wind-driven generator 2, net side converter 3, rotor-side converter 4, current transformer control circuit 5, rotor protection circuit 6, rotor circuit start-up circuit 7, control circuit 8 between age at failure, crowbar circuit 10, stator circuit breaker 11 and interface transformer 12.
Wind speed model 1, near wind-driven generator 2, simulates different wind regime.
Between age at failure, control circuit 8 one end is connected with feeder voltage, and the other end connects converter control circuit 5 and crowbar circuit 10, and the feeder voltage in a monitoring wind-powered electricity generation group of planes, controls the operation between wind-powered electricity generation group of planes age at failure.
Rotor protection circuit 6 one end is connected with wind-driven generator 2, and the other end is connected with feeder voltage by rotor protection circuit starting circuit 7.
Converter control circuit 5 control connection net side converter 3 and rotor-side converter 4.
Rotor-side converter 4 is connected with the rotor of crowbar circuit 10 with wind-driven generator 2.
Stator circuit breaker 11 is connected with the stator of wind-driven generator 2.
Interface transformer 12 is connected with stator circuit breaker 11 and electrical network.
Embodiment one:
Be illustrated in figure 1 the structural representation of the embodiment of this wind energy turbine set, the type of wind-driven generator 2 comprises double-fed, mouse-cage type and direct-driving type, with double feed wind power generator (DFIG in the present embodiment, double fed induction generator) be example, as shown in Figure 1, in this embodiment, wind energy turbine set comprises two wind-powered electricity generation group of planes: wind-powered electricity generation group of planes A and wind-powered electricity generation group of planes B.
Concrete, the wind regime that Wind speed model 1 is simulated comprises: basic wind, fitful wind, gradual change wind and RANDOM WIND.
Rotor protection circuit starting circuit 7 is all connected with feeder voltage with one end of control circuit between age at failure 8, and using this feeder voltage as enabling signal, this feeder voltage of control circuit 8 continuous surveillance between age at failure, this feeder voltage is illustrated in figure 1 35KV feeder voltage.
Control procedure between age at failure as shown in Figure 2, comprising:
Control circuit 8 Real-Time Monitoring feeder voltage drop range between age at failure:
This drop range exceedes threshold value for the moment, closes rotor-side converter 4, improves the reactive power that net side converter 3 sends, reply grid voltage sags.
When this drop range exceedes threshold value two, close rotor-side converter 4, improve the reactive power that net side converter 3 sends, rotor protection circuit starting circuit 7 starts rotor protection circuit 6.Rotor protection circuit 6 shares the meritorious surplus of rotor-side, effectively prevents wind-driven generator 2 rotating speed too high.
When this drop range exceedes threshold value three; close rotor-side converter 4; improve the reactive power that net side converter 3 sends; rotor protection circuit starting circuit 7 starts rotor protection circuit 6; between age at failure, control circuit 8 sends control signal and controls stator circuit breaker 11 and disconnect; the stator of wind-driven generator 2 is kept being connected by resistive element with electrical network, the stator current between age at failure is decayed rapidly.
This threshold value one, threshold value two and threshold value three are for reaching standard-required and three threshold values realizing equipment protection and arrange voluntarily.
Rotor protection circuit 6 is made up of uncontrollable bridge rectifier, turn-off thyristor GTO and resistance.Doubly taken advantage of the grid side electric current of interface transformer 12 by programming realization, thus change the size that a wind-powered electricity generation group of planes sends power.
Further; control circuit 8 Real-Time Monitoring feeder voltage drop range between age at failure, this drop range is no more than threshold value for the moment, when namely 35KV feeder voltage is returned near normal value; during detection failure, whether control circuit 8 recovers; be, without operation, no; recover control circuit 8 between age at failure; the process recovering control circuit 8 between age at failure comprises: excision rotor protection circuit 6, sends control signal and close stator circuit breaker 11, recover normal condition.
Preferably, this wind-powered electricity generation group of planes can also comprise the DC bus braking circuit be connected with DC bus, and when drop range exceedes threshold value two or threshold value three, operation can replace with: drop into DC bus braking circuit restriction DC bus-bar voltage and raise.
Wind-powered electricity generation cluster also comprises the low voltage ride through control circuit 9 of the grid-connected point voltage of a monitoring wind-powered electricity generation group of planes, this low voltage ride through control circuit 9 comprise with and site be connected control the grid-connected or off-grid of a wind-powered electricity generation group of planes grid-connected/off-grid switch, the flow chart of grid-connected or off-grid when being illustrated in figure 3 judgement wind-powered electricity generation group of planes fault provided by the invention, as shown in Figure 3, when judging wind energy turbine set fault, process that is grid-connected or off-grid comprises:
Start timer when fault starts and start timing, the time quantum obtained by timer is input in this low-voltage crossing iunction for curve, obtain reference voltage level, grid-connected for wind-powered electricity generation group of planes point voltage is compared in real time with this reference voltage level, if the grid-connected point voltage of a wind-powered electricity generation group of planes is higher than this reference voltage level, grid-connected/off-grid switch opens, this wind-powered electricity generation group of planes off-grid; If the grid-connected point voltage of a wind-powered electricity generation group of planes is lower than this reference voltage level, grid-connected/off-grid switch remains closed, and this wind-powered electricity generation group of planes keeps grid-connected.
Wherein, the schematic diagram of the low voltage crossing curve that wind energy turbine set access electric power network technique specifies as shown in Figure 4, time quantum, according to the matching of wind energy turbine set access electric power network technique regulation, is input to the voltage reference value for correspondence on low voltage crossing curve obtained in this low-voltage crossing iunction for curve by low-voltage crossing iunction for curve.
Although be described in detail embodiments of the invention with reference to the accompanying drawings above, be not limited only to this embodiment, various equivalent, the deformation process that those skilled in the art carries out according to this concrete technical scheme, also within protection scope of the present invention.
Claims (10)
1. the method for the real-timedigital simulation modeling of a high permeability wind energy turbine set, it is characterized in that, described wind energy turbine set comprises at least two wind-powered electricity generation group of planes, and each described wind-powered electricity generation group of planes comprises control circuit (8), crowbar circuit (10), stator circuit breaker (11) and interface transformer (12) between Wind speed model (1), wind-driven generator (2), net side converter (3), rotor-side converter (4), current transformer control circuit (5), rotor protection circuit (6), rotor protection circuit starting circuit (7), age at failure;
Described Wind speed model (1), near wind-driven generator (2), simulates different wind regime;
Between described age at failure, control circuit (8) one end is connected with feeder voltage, the other end connects described current transformer control circuit (5) and described crowbar circuit (10), monitor the described feeder voltage in a described wind-powered electricity generation group of planes, control the operation between described wind-powered electricity generation group of planes age at failure;
Described rotor protection circuit (6) one end is connected with described wind-driven generator (2), and the other end is connected with described feeder voltage by described rotor protection circuit starting circuit (7);
Net side converter (3) and described rotor-side converter (4) described in described current transformer control circuit (5) control connection;
Described rotor-side converter (4) is connected with the rotor of described crowbar circuit (10) with described wind-driven generator (2);
Described stator circuit breaker (11) is connected with the stator of described wind-driven generator (2);
Described interface transformer (12) is connected with stator circuit breaker (11) and electrical network;
Described rotor protection circuit starting circuit (7) is all connected with described feeder voltage with one end of control circuit (8) between described age at failure; using described feeder voltage as enabling signal; feeder voltage described in control circuit (8) continuous surveillance between age at failure; described feeder voltage is 35KV feeder voltage
Control procedure between age at failure comprises:
Control circuit (8) Real-Time Monitoring feeder voltage drop range between described age at failure:
Described drop range exceedes threshold value for the moment, closes described rotor-side converter (4), improves the reactive power that described net side converter (3) sends;
When described drop range exceedes threshold value two, close described rotor-side converter (4), improve the reactive power that described net side converter (3) sends, described rotor protection circuit starting circuit (7) starts described rotor protection circuit (6), share the meritorious surplus of rotor-side, prevent described wind-driven generator (2) rotating speed too high;
When described drop range exceedes threshold value three; close described rotor-side converter (4); improve the reactive power that described net side converter (3) sends; described rotor protection circuit starting circuit (7) starts described rotor protection circuit (6); between described age at failure, control circuit (8) sends control signal and controls the disconnection of described stator circuit breaker (11); the stator of described wind-driven generator (2) is kept being connected by resistive element with electrical network, the stator current between age at failure is decayed rapidly.
2. the method for claim 1, is characterized in that, the type of described wind-driven generator (2) comprises double-fed, mouse-cage type and direct-driving type.
3. the method for claim 1, is characterized in that, the wind regime that described Wind speed model (1) is simulated comprises: basic wind, fitful wind, gradual change wind and RANDOM WIND.
4. the method for claim 1, is characterized in that, described rotor protection circuit (6) comprises uncontrollable bridge rectifier, turn-off thyristor and resistance.
5. the method for claim 1, is characterized in that, is doubly taken advantage of the grid side electric current of interface transformer (12) by programming realization, thus changes the size that a wind-powered electricity generation group of planes sends power.
6. the method for claim 1, it is characterized in that, control circuit (8) Real-Time Monitoring feeder voltage drop range between described age at failure, described drop range is no more than threshold value for the moment, detect control circuit (8) between described age at failure whether to recover, be, without operation, no, recover control circuit (8) between described age at failure.
7. method as claimed in claim 6; it is characterized in that; between described recovery described age at failure, the process of control circuit (8) comprising: excise described rotor protection circuit (6), sends control signal and closes described stator circuit breaker (11), recovers normal condition.
8. method as claimed in claim 7, it is characterized in that, a described wind-powered electricity generation group of planes also comprises the DC bus braking circuit be connected with DC bus, when described drop range exceedes described threshold value two or described threshold value three, operation can replace with: drop into described DC bus braking circuit and limit the rising of described DC bus-bar voltage.
9. the method for claim 1, it is characterized in that, a described wind-powered electricity generation group of planes also comprises the low voltage ride through control circuit (9) of the grid-connected point voltage of a monitoring wind-powered electricity generation group of planes, described low voltage ride through control circuit (9) comprise control the grid-connected or off-grid of a wind-powered electricity generation group of planes grid-connected/off-grid switch, when judging wind energy turbine set fault, process that is grid-connected or off-grid comprises:
Start timer when fault starts and start timing, the time quantum that described timer obtains is input in low-voltage crossing iunction for curve, obtain reference voltage level, the grid-connected point voltage of a described wind-powered electricity generation group of planes is compared in real time with described reference voltage level, if the grid-connected point voltage of a described wind-powered electricity generation group of planes is higher than described reference voltage level, described grid-connected/off-grid switch opens, described wind-powered electricity generation group of planes off-grid; If the grid-connected point voltage of a described wind-powered electricity generation group of planes is lower than this reference voltage level, described grid-connected/off-grid switch remains closed, a described wind-powered electricity generation group of planes keeps grid-connected.
10. method as claimed in claim 9, it is characterized in that, described time quantum, according to the matching of wind energy turbine set access electric power network technique regulation, is input to the voltage reference value of correspondence on low voltage crossing curve specify for described wind energy turbine set access electric power network technique that obtains in described low-voltage crossing iunction for curve by described low-voltage crossing iunction for curve.
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| CN103346563B (en) * | 2013-07-15 | 2015-04-29 | 国家电网公司 | Method for evaluating maximum permeability of distributed generation based on time scene access analysis |
| CN104283212B (en) * | 2014-10-11 | 2016-04-27 | 广西大学 | A kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO |
| CN106527182A (en) * | 2016-12-23 | 2017-03-22 | 华南理工大学 | Power grid stability test system containing multiple types of high-penetration new energy based on RTDS and method thereof |
| CN109050859B (en) * | 2018-06-12 | 2020-06-26 | 同济大学 | Double-fed ship hybrid shaft motor independent propulsion system and control method thereof |
| CN112710925A (en) * | 2020-12-22 | 2021-04-27 | 三峡大学 | High-permeability active power distribution network fault location method based on improved VMD and S transformation |
| CN114221381A (en) * | 2021-12-14 | 2022-03-22 | 国家电网有限公司 | Simplified modeling method for new energy power supply |
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