CN203479929U - Grid operation simulating device for wind power plant - Google Patents
Grid operation simulating device for wind power plant Download PDFInfo
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- CN203479929U CN203479929U CN201320471159.2U CN201320471159U CN203479929U CN 203479929 U CN203479929 U CN 203479929U CN 201320471159 U CN201320471159 U CN 201320471159U CN 203479929 U CN203479929 U CN 203479929U
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Abstract
The utility model provides a grid operation simulating device for a wind power plant. The grid operation simulating device comprises a buck transformer, a grid disturbance simulated generator and a grid fault simulated generator, wherein one terminal of the buck transformer is connected with a middle-high voltage grid, the other terminal of the buck transformer is connected with an input terminal of the grid disturbance simulated generator, an output terminal of the grid disturbance simulated generator is connected with an input terminal of the grid fault simulated generator, and an output terminal of the grid fault simulated generator is connected with a middle-high voltage grid. With the grid operation simulating device, on-line mixing simulation of grid disturbances and faults can be achieved, actual operation data of a wind turbine generator system during a test period can be acquired and analyzed, grid adaptability tests, low-voltage ride through capability tests and high-voltage ride through capability tests and detections can be carried out for the wind turbine generator system, and grid disturbance anti-interference capability and grid fault ride through capability of the wind turbine generator system can be tested and evaluated comprehensively.
Description
Technical field
The utility model belongs to new forms of energy access and control technology field, is specifically related to a kind of wind energy turbine set operation of power networks analogue means.
Background technology
Wind-powered electricity generation unit is as one of the generator unit in net, its be one of fabricator while of wind energy turbine set disturbance and failure problems and problem hold one of receptor.The wind-electricity integration of high penetration moves to power system safety and stability operation and has brought huge challenge, possesses grid disturbance antijamming capability and electric network fault ride-through capability has become the inevitable requirement to wind-powered electricity generation unit/wind energy turbine set.
In the grid-connected guide rule of each main wind-powered electricity generation developed country of the world, all the grid disturbance antijamming capability of wind-powered electricity generation unit/wind energy turbine set and electric network fault ride-through capability have been made to requirement in various degree.And system complexity and the grid height susceptibility of the natural qualities such as the undulatory property of wind-resources, intermittence and wind-powered electricity generation unit, determined that wind-powered electricity generation unit grid disturbance antijamming capability and the test of electric network fault ride-through capability detect and must under the condition of being incorporated into the power networks, carry out, laboratory simulation or shop test cannot accurately reflect grid disturbance antijamming capability and the electric network fault ride-through capability of wind-powered electricity generation unit all sidedly.
For adapting to grid-connected guide rule requirement, wind-powered electricity generation unit must carry out grid disturbance antijamming capability and the test of electric network fault ride-through capability, and it mainly comprises low voltage crossing (Low Voltage Ride Through) test, high voltage crossing (High Voltage Ride Through) test and grid adaptability (Grid Adaptability) test.And current three test events all have different separately proving installations to complete, its test period is long, and cannot once complete above-mentioned three grid disturbance antijamming capabilities and the test of electric network fault ride-through capability, through the test wind-powered electricity generation unit of above-mentioned individual event grid disturbance, low voltage crossing and high voltage crossing fault, still cannot normally be incorporated into the power networks.For example certain wind energy turbine set generation electrical network two-phase of NORTHWEST CHINA in 2012 area is fallen fault, and the wind turbine that possesses low voltage ride-through capability of wind turbine generator system forms merit and tides over low voltage failure and move continuously not off-grid; And in line voltage rejuvenation subsequently, because part reactive power compensator in electric system does not possess self-switchover function, causing the idle surplus of partial electric grid, there is high voltage fail in electrical network, and the unit that the part making does not possess high voltage crossing ability excises because of high voltage fail; In addition, because low voltage failure, high voltage fail have caused large quantities of wind-powered electricity generation unit off-grids, caused the imbalance of active power in system, system mains frequency is reduced, part wind-powered electricity generation unit excises from electrical network because not possessing mains frequency adaptive faculty.
For ensureing the power system safety and stability operation after large-scale wind power access, must accelerate wind-powered electricity generation unit grid disturbance antijamming capability and the test of electric network fault ride-through capability, be badly in need of researching and developing and integrate grid disturbance antijamming capability and the electric network fault ride-through capability proving installation that LVRT Capability of Wind Turbine Generator, high voltage crossing, grid adaptability are tested.
Utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of wind energy turbine set operation of power networks analogue means, it can online accurately simulation produce real Network Voltage Deviation in wind-powered electricity generation unit step-up transformer high-pressure side, frequency change, imbalance of three-phase voltage, voltage flicker and harmonic wave, low voltage failure of electric network and electrical network high voltage fail, realize the on-line mixing simulation of grid disturbance and fault, gather and analyze the actual operating data of wind-powered electricity generation unit test period, can carry out grid adaptability test to wind-powered electricity generation unit, low voltage ride-through capability test and high voltage crossing ability test and detection, the grid disturbance antijamming capability of wind-powered electricity generation unit and electric network fault ride-through capability are carried out to comprehensive test and evaluation.
To achieve these goals, the utility model is taked following scheme:
A kind of wind energy turbine set operation of power networks analogue means is provided, and described device comprises step-down transformer, grid disturbance simulation generator and electric network fault simulation generator; One end of described step-down transformer connects mesohigh electrical network, the other end connects the input end of grid disturbance simulation generator, the output terminal of described grid disturbance simulation generator connects the input end of electric network fault simulation generator, and the output terminal of described electric network fault simulation generator connects mesohigh electrical network.
By changing a umber of turn of described step-down transformer, this device is accessed to different electric pressures; By changing the Secondary Winding number of turn of described step-down transformer, select the back-to-back converter of different electric pressures, meet the testing requirement of wind energy turbine set/wind-powered electricity generation unit of different electrical network access grades.
Described grid disturbance simulation generator comprises back-to-back converter, and described back-to-back converter comprises rectification circuit and inverter circuit, and both form by power electronics semiconductor switch device.
Described rectification circuit adopts three-phase commutation bridge or single-phase H bridge rectification circuit, and the power electronics semiconductor switch device of rectification circuit adopts thyristor, insulated gate bipolar transistor or integrated grid commutated thyristor; Described inverter circuit adopts three phase full bridge inversion, single-phase H bridge or single-phase H bridge cascade circuit, and the power electronics semiconductor switch device of inverter circuit adopts insulated gate bipolar transistor or integrated grid commutated thyristor.
The unsteady flow topology mode that described back-to-back converter adopts comprises low voltage three-phase AC-DC-AC unsteady flow mode, middle pressure three-phase AC-DC-AC unsteady flow mode or three single-phase AC-DC-AC unsteady flow modes, and the parallel running by back-to-back converter is to expand the capacity of described grid disturbance simulation generator.
Described grid disturbance simulation generator simulating grid state of disturbance, output grid disturbance waveform, by revising the modulating wave instruction of back-to-back converter inversion side, can obtain at the output terminal of grid disturbance simulation generator grid disturbance waveform.
Described grid disturbance state comprises Network Voltage Deviation, frequency departure, imbalance of three-phase voltage, voltage fluctuation and flicker and mains by harmonics voltage.
Described electric network fault simulation generator comprises step-up transformer, anti-parallel thyristor valve group and current-limiting resistance; The secondary of described step-up transformer is drawn by organizing tap more, each tap output terminal described thyristor valve group of all connecting, the output terminal of every two adjacent taps is all by current-limiting resistance short circuit, and the current-limiting resistance end of each adjacent taps of while is one group of thyristor valve group in parallel all.
Described step-up transformer tap range of adjustment is 0%-200%, and the step-length of voltage-regulation is 5%; Regulate step-up transformer tap to get final product output rated voltage, high voltage more than rated voltage and the low-voltage below rated voltage.
The short-circuit current of described current-limiting resistance restriction step-up transformer secondary in tap adjustment process, to protect step-up transformer winding to be subject to overcurrent or to cross fire damage; Described thyristor valve group is used for regulating the tap of step-up transformer secondary.
Compared with prior art, the beneficial effects of the utility model are:
(1) this device can online simulation 50Hz and whole operating conditions of 60Hz electrical network, the various grid disturbances such as voltage deviation, frequency departure, imbalance of three-phase voltage, voltage flicker and harmonic wave, voltage swells, voltage dip, voltage rising, voltage slow decreasing can be produced online, the test request of each main wind-electricity integration guide rule of the world to LVRT Capability of Wind Turbine Generator, high voltage crossing and grid adaptability can be met;
(2) this device can be realized the hybrid analog-digital simulation of various grid disturbances and malfunction, and the real simulation that can accurately realize grid disturbance and failure process produces, and can reflect grid disturbance and the fault antijamming capability of wind-powered electricity generation unit comprehensively; For example, can realize the real simulation of wind energy turbine set low voltage failure process, first produce line voltage and fall fault, in falling process, follow voltage waveform distortion and SPA sudden phase anomalies, there is electrical network high voltage fail after recovering in voltage, fits like a glove at once with actual wind energy turbine set low voltage failure process waveform.
Accompanying drawing explanation
Fig. 1 is wind energy turbine set operation of power networks analogue means structural representation;
Fig. 2 is the A phase structure schematic diagram that the secondary tap based on valve control techniques regulates transformer automatically;
Fig. 3 is the test system structure figure of operation of power networks simulation generator;
Fig. 4 is operation of power networks analogue means on-the-spot test wiring schematic diagram;
Fig. 5 is Network Voltage Deviation measured waveform figure in the utility model embodiment;
Fig. 6 is mains frequency deviation measured waveform figure in the utility model embodiment;
Fig. 7 is imbalance of three-phase voltage measured waveform figure in the utility model embodiment;
Fig. 8 is corresponding tri-phase unbalance factor schematic diagram constantly in the utility model embodiment;
Fig. 9 is voltage fluctuation and flicker measured waveform figure in the utility model embodiment;
Figure 10 is harmonic voltage measured waveform figure in the utility model embodiment;
Figure 11 is harmonic content figure corresponding to shape in the utility model embodiment;
Figure 12 is harmonic voltage rising measured waveform figure in the utility model embodiment;
Figure 13 is the effective value oscillogram that in the utility model embodiment, harmonic voltage rising is corresponding;
Figure 14 is harmonic voltage slow decreasing measured waveform figure in the utility model embodiment;
Figure 15 is the effective value oscillogram that in the utility model embodiment, harmonic voltage slow decreasing is corresponding;
Figure 16 is voltage swells measured waveform figure in the utility model embodiment;
Figure 17 is voltage dip measured waveform figure in the utility model embodiment;
Figure 18 is that back-to-back converter adopts low voltage three-phase AC-DC-AC unsteady flow mode topology diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 1, the utility model provides a kind of wind energy turbine set operation of power networks analogue means, comprises step-down transformer, grid disturbance simulation generator and electric network fault simulation generator; One end of described step-down transformer connects mesohigh electrical network, the other end connects the input end of grid disturbance simulation generator, the output terminal of described grid disturbance simulation generator connects the input end of electric network fault simulation generator, and the output terminal of described electric network fault simulation generator connects mesohigh electrical network; Isolating switch CB in parallel between the input end of described grid disturbance simulation generator and output terminal.
Step-down transformer has determined the line voltage access grade of this device, has determined the operation voltage level of grid disturbance simulation generator and electric network fault simulation generator simultaneously.By changing a umber of turn of described step-down transformer, this device is accessed to the electric pressure of 690V, 10kV, 35kV, 110kV or 220kV; The Secondary Winding characteristic of step-down transformer has determined the operation voltage level of grid disturbance simulation generator and electric network fault analogue means, the operation voltage level of back-to-back converter for grid disturbance simulation generator particularly, by changing the Secondary Winding number of turn of described step-down transformer, select low pressure 380V, 690V, middle pressure 3.3kV, 6.6kV, 10kV back-to-back converter, meet the testing requirement of wind energy turbine set/wind-powered electricity generation unit of different electrical network access grades.
Described grid disturbance simulation generator comprises back-to-back converter, and described back-to-back converter comprises rectification circuit and inverter circuit, and both form by power electronics semiconductor switch device.
Described rectification circuit adopts three-phase commutation bridge or single-phase H bridge rectification circuit, and the power electronics semiconductor switch device of rectification circuit adopts thyristor (Thyristor), insulated gate bipolar transistor (IGBT) or integrated grid commutated thyristor (IGCT); Described inverter circuit adopts three phase full bridge inversion, single-phase H bridge or single-phase H bridge cascade circuit, and the power electronics semiconductor switch device of inverter circuit adopts insulated gate bipolar transistor (IGBT) or integrated grid commutated thyristor (IGCT).
The unsteady flow topology mode that described back-to-back converter adopts comprises low voltage three-phase AC-DC-AC unsteady flow mode (as Figure 18), middle pressure three-phase AC-DC-AC unsteady flow mode or three single-phase AC-DC-AC unsteady flow modes, with timer, by AC-DC-AC Semiconductor Converting Technology and electrical network access point, isolate completely, avoided the impact of device on access electrical network.The voltage operation level of grid disturbance simulation generator depends primarily on the no-load voltage ratio of step-down transformer, and its working capacity depends primarily on capacity and the quantity in parallel of AC-DC-AC current transformer.
Described grid disturbance simulation generator simulating grid state of disturbance, output grid disturbance waveform, by revising the modulating wave instruction of back-to-back converter inversion side, can obtain at the output terminal of grid disturbance simulation generator grid disturbance waveform.
Described grid disturbance state comprises Network Voltage Deviation, frequency departure, imbalance of three-phase voltage, voltage fluctuation and flicker and mains by harmonics voltage.
Electric network fault simulation generator is the transformer secondary tap automatic adjustment technology based on valve control techniques mainly, and it can be simulated and produce electrical network low voltage short trouble and power network overvoltage fault.As Fig. 2, electric network fault simulation generator comprises step-up transformer, anti-parallel thyristor valve group and current-limiting resistance; The secondary of described step-up transformer is drawn by organizing tap more, each tap output terminal described thyristor valve group of all connecting, the output terminal of every two adjacent taps is all by current-limiting resistance short circuit, and the current-limiting resistance end of each adjacent taps of while is one group of thyristor valve group in parallel all.
Described step-up transformer tap range of adjustment is 0%-200%, and the step-length of voltage-regulation is 5%; Regulate step-up transformer tap to get final product output rated voltage, high voltage more than rated voltage and the low-voltage below rated voltage.
The short-circuit current of described current-limiting resistance restriction step-up transformer secondary in tap adjustment process, to protect step-up transformer winding to be subject to overcurrent or to cross fire damage; Described thyristor valve group is used for regulating the tap of step-up transformer secondary.
The process of brief description electric network fault simulation generator generation electrical network high voltage and low-voltage (regulating 10%Un):
Suppose that the original state novel transformer regulating is operated in rated voltage output state, now the thyristor valve group on off state of transformer secondary is as follows: thyristor valve group X2 (n+1) arrives X2 (n+i) in opening state, X2 (n) arrives X2 (n-j) in off state, only X1 (n) is in opening state to X1 (n+i) for X1 (n-j), and all the other are all in off state.
Low-voltage generating process thyristor valve group is cut-off sequentially as follows: X2 (n+1) and X2 (n+2) turn-off, and thyristor valve group X1 (n+2) is open-minded, and X1 (n) turn-offs.
High voltage generating process thyristor valve group is cut-off sequentially as follows: thyristor valve group X1 (n-2) is open-minded, and X1 (n) turn-offs, and X2 (n) and X2 (n-1) are open-minded.
The test macro of operation of power networks simulation generator is mainly by operation of power networks analogue means, measuring system, remote monitoring system and composition of the control system on the spot on the spot, as Fig. 3.Operation of power networks analogue means is passed to control system on the spot by status signal, control system judges according to described status signal on the spot, control system is on the spot sent to steering order, remote monitoring system and on the spot control system by and between measuring system, carry out on the spot information interaction, measuring system is by surveyed data transmission to remote monitoring system on the spot, and remote monitoring system sends steering order to measuring system on the spot.
Embodiment
During test, disconnect the high-pressure side wiring of wind-powered electricity generation unit step-up transformer, between the series connection inlet air group of motors step-up transformer of electric network fault simulation generator and access electrical network, test wiring diagram is as Fig. 4.Once wiring completes, all operations of proving installation all completes by distant place TT&C system.
The equipment access 35kV medium voltage network of now take describes the actual output performance of equipment as example.The Network Voltage Deviation measured waveform that proving installation produces is as Fig. 5, and wherein solid line is proving installation access point voltage, and dotted line is the line voltage that proving installation produces in wind-powered electricity generation unit step-up transformer high-pressure side; The mains frequency deviation measured waveform that proving installation produces is as Fig. 6, and wherein solid line is proving installation access point frequency, and dotted line is the mains frequency that proving installation produces in wind-powered electricity generation unit step-up transformer high-pressure side; The imbalance of three-phase voltage measured waveform that proving installation produces is as Fig. 7, and Fig. 8 represents corresponding imbalance of three-phase voltage degree constantly; The voltage fluctuation and flicker measured waveform that proving installation produces is as Fig. 9, and wherein solid line is proving installation access point voltage, and dotted line is the line voltage that proving installation produces in wind-powered electricity generation unit step-up transformer high-pressure side; The harmonic voltage measured waveform that proving installation produces is as Figure 10, and Figure 11 is corresponding harmonic content figure; The harmonic voltage rising measured waveform that proving installation produces is as Figure 12, and Figure 13 is corresponding effective value oscillogram; The harmonic voltage slow decreasing measured waveform that proving installation produces is as Figure 14, and Figure 15 is corresponding effective value oscillogram; The voltage swells measured waveform that proving installation produces is as Figure 16, and the voltage dip measured waveform that proving installation produces is as Figure 17.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (9)
1. a wind energy turbine set operation of power networks analogue means, is characterized in that: described device comprises step-down transformer, grid disturbance simulation generator and electric network fault simulation generator; One end of described step-down transformer connects mesohigh electrical network, the other end connects the input end of grid disturbance simulation generator, the output terminal of described grid disturbance simulation generator connects the input end of electric network fault simulation generator, and the output terminal of described electric network fault simulation generator connects mesohigh electrical network.
2. wind energy turbine set operation of power networks analogue means according to claim 1, it is characterized in that: described grid disturbance simulation generator comprises back-to-back converter, described back-to-back converter comprises rectification circuit and inverter circuit, and both form by power electronics semiconductor switch device.
3. wind energy turbine set operation of power networks analogue means according to claim 2, it is characterized in that: described rectification circuit adopts three-phase commutation bridge or single-phase H bridge rectification circuit, the power electronics semiconductor switch device of rectification circuit adopts thyristor, insulated gate bipolar transistor or integrated grid commutated thyristor; Described inverter circuit adopts three phase full bridge inversion, single-phase H bridge or single-phase H bridge cascade circuit, and the power electronics semiconductor switch device of inverter circuit adopts insulated gate bipolar transistor or integrated grid commutated thyristor.
4. wind energy turbine set operation of power networks analogue means according to claim 2, it is characterized in that: the unsteady flow topology mode that described back-to-back converter adopts comprise low voltage three-phase AC ?DC ?AC unsteady flow mode, middle pressure three-phase AC ?DC ?AC unsteady flow mode or three single-phase AC ?DC ?AC unsteady flow mode, the parallel running by back-to-back converter is to expand the capacity of described grid disturbance simulation generator.
5. wind energy turbine set operation of power networks analogue means according to claim 2, it is characterized in that: described grid disturbance simulation generator simulating grid state of disturbance, output grid disturbance waveform, by revising the modulating wave instruction of back-to-back converter inversion side, can obtain at the output terminal of grid disturbance simulation generator grid disturbance waveform.
6. wind energy turbine set operation of power networks analogue means according to claim 5, is characterized in that: described grid disturbance state comprises Network Voltage Deviation, frequency departure, imbalance of three-phase voltage, voltage fluctuation and flicker and mains by harmonics voltage.
7. wind energy turbine set operation of power networks analogue means according to claim 1, is characterized in that: described electric network fault simulation generator comprises step-up transformer, anti-parallel thyristor valve group and current-limiting resistance; The secondary of described step-up transformer is drawn by organizing tap more, each tap output terminal described thyristor valve group of all connecting, the output terminal of every two adjacent taps is all by current-limiting resistance short circuit, and the current-limiting resistance end of each adjacent taps of while is one group of thyristor valve group in parallel all.
8. wind energy turbine set operation of power networks analogue means according to claim 7, is characterized in that: described step-up transformer tap range of adjustment be 0% ?200%, the step-length of voltage-regulation is 5%; Step-up transformer tap gets final product output rated voltage, high voltage more than rated voltage and the low-voltage below rated voltage.
9. wind energy turbine set operation of power networks analogue means according to claim 7, is characterized in that: described current-limiting resistance limits the short-circuit current of step-up transformer secondary in tap adjustment process, to protect step-up transformer winding to be subject to overcurrent or to cross fire damage; Described thyristor valve group is for the tap of step-up transformer secondary.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320471159.2U CN203479929U (en) | 2013-08-02 | 2013-08-02 | Grid operation simulating device for wind power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320471159.2U CN203479929U (en) | 2013-08-02 | 2013-08-02 | Grid operation simulating device for wind power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597893A (en) * | 2014-12-23 | 2015-05-06 | 国电南瑞科技股份有限公司 | Electric variable pitch testing system and method applicable to megawatt wind turbine generator |
| CN104764958A (en) * | 2015-04-14 | 2015-07-08 | 国家电网公司 | Testing system of power quality control equipment |
| CN107561437A (en) * | 2016-06-30 | 2018-01-09 | 中国电力科学研究院 | A kind of Wind turbines primary frequency modulation method of testing |
-
2013
- 2013-08-02 CN CN201320471159.2U patent/CN203479929U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597893A (en) * | 2014-12-23 | 2015-05-06 | 国电南瑞科技股份有限公司 | Electric variable pitch testing system and method applicable to megawatt wind turbine generator |
| CN104764958A (en) * | 2015-04-14 | 2015-07-08 | 国家电网公司 | Testing system of power quality control equipment |
| CN107561437A (en) * | 2016-06-30 | 2018-01-09 | 中国电力科学研究院 | A kind of Wind turbines primary frequency modulation method of testing |
| CN107561437B (en) * | 2016-06-30 | 2021-09-03 | 中国电力科学研究院有限公司 | Primary frequency modulation testing method for wind turbine generator |
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