CN108631337B - Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method - Google Patents
Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method Download PDFInfo
- Publication number
- CN108631337B CN108631337B CN201810503606.5A CN201810503606A CN108631337B CN 108631337 B CN108631337 B CN 108631337B CN 201810503606 A CN201810503606 A CN 201810503606A CN 108631337 B CN108631337 B CN 108631337B
- Authority
- CN
- China
- Prior art keywords
- current
- grid
- doubly
- side converter
- wind turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
A converter cooperative damping control based doubly-fed wind turbine generator subsynchronous resonance suppression method relates to the technical field of doubly-fed wind turbine generator grid-connected control. The invention aims to solve the problems of low equipment utilization rate and control error of the subsynchronous oscillation suppression method. According to the method, collected stator current signals and grid-side converter currents are subjected to Clark conversion and Park conversion in sequence, the influence of direct current components is eliminated by using a high-pass filter, d-axis disturbance components and q-axis disturbance components of the stator currents are input into a proportional amplifier to obtain rotor voltage additional signals, the d-axis disturbance components and the q-axis disturbance components of a grid-side converter are input into the proportional amplifier to obtain grid-side converter current reference additional signals, the rotor voltage additional signals are loaded into output signals of a rotor-side current controller, and the grid-side converter current reference additional signals are loaded into input signals of a grid-side converter current controller, so that the suppression of subsynchronous resonance of the doubly-fed wind turbine is realized.
Description
Technical Field
The invention belongs to the technical field of grid-connected control of a double-fed wind turbine generator.
Background
Series compensation reduces line equivalent reactance through series compensation capacitance on the line, and can improve line transmission capability. However, in a large-scale wind power grid-connected system, the risk of inducing sub-synchronous resonance (SSR) exists, and the problem is widely concerned at home and abroad.
The doubly-fed wind turbine generator is the most widely applied wind turbine generator at present, but the doubly-fed wind turbine generator is easier to generate subsynchronous oscillation under the condition of series compensation than other types of wind turbine generators. The existing subsynchronous oscillation suppression method for the series compensation circuit of the doubly-fed wind turbine generator mainly comprises two main categories: one is damping with Flexible Alternating Current Transmission System (FACTS) devices and the other is damping with additional damping control of the wind turbine itself. The additional investment of FACTS devices on existing lines to suppress SSR increases investment costs and equipment utilization is not high. Most of the existing methods for suppressing the SSR by additional damping control only select the rotating speed and the series compensation capacitor voltage as control signals on the rotor side or the network side, the actual series compensation capacitor voltage cannot be directly acquired, prediction needs to be carried out through acquired line current, and certain errors exist.
Disclosure of Invention
The invention provides a converter cooperative damping control based doubly-fed wind turbine generator subsynchronous resonance suppression method, which aims to solve the problems that the existing subsynchronous oscillation suppression method is low in equipment utilization rate and errors exist in control signal acquisition.
The doubly-fed wind turbine generator subsynchronous resonance suppression method based on converter cooperative damping control comprises the following steps:
the method comprises the following steps: stator current signal i of stator winding of doubly-fed generator is collecteds_abcAnd the grid side converter current ig_abc，
Step two: the stator current signal is_abcAnd the grid side converter current ig_abcObtaining a stator current signal i under a synchronous rotation system through Clark conversion and Park conversion in sequences_dqAnd the grid side converter current ig_dq，
Step three: cancellation of i using high pass filterss_dqAnd ig_dqThe d and q axis disturbance components of the stator current and the d and q axis disturbance components of the network side converter are respectively extracted under the influence of the medium direct current component,
step four: inputting d and q axis disturbance components of the stator current into a proportional amplifier to obtain a rotor voltage additional signal, inputting d and q axis disturbance components of the grid-side converter into the proportional amplifier to obtain a grid-side converter current reference additional signal,
step five: and loading the rotor voltage additional signal into an output signal of the rotor side current control loop, and loading the grid side converter current reference additional signal into an input signal of the grid side current control loop to realize the suppression of the sub-synchronous resonance of the doubly-fed wind turbine generator.
In the first step, a stator current signal i is acquired through a stator current sensor of a stator winding of the doubly-fed generators_abcCollecting the current i of the network side converter by the current sensor of the network side converterg_abc。
The high-pass filter in the third step is a second-order high-pass filter, and the transfer function of the second-order high-pass filter is as follows:
wherein, ω isnRepresenting a natural angular frequency; xi represents a damping ratio, and the value is 0.02; s represents the laplacian operator.
Rotor side proportionality coefficient of proportional amplifier in step four
The value range of (1) is 0.03 to 0.21, and the net side proportionality coefficient
The value range of (a) is from 0.15 to 0.23.
The doubly-fed wind turbine generator subsynchronous resonance suppression method based on converter collaborative damping control is mainly characterized in that in the doubly-fed wind turbine converter, normally RSC samples stator current to carry out power control, GSC samples grid-side converter current to carry out current control, stator current disturbance feedback is adopted on RSC, and a collaborative additional damping control strategy of grid-side converter current disturbance feedback is adopted on GSC. On one hand, two disturbance feedback signals of the stator current and the grid-side converter current are selected, the double-fed wind power converter can sample, extra acquisition is not needed, and the investment cost can be greatly saved. On the other hand, the rotor side converter and the grid side converter cooperate with additional damping control, negative impedance characteristics of the double-fed wind turbine generator can be better improved, additional damping can be adjusted, and subsynchronous resonance can be effectively inhibited.
Drawings
FIG. 1 is a structural diagram of a doubly-fed wind turbine system;
FIG. 2 is a block diagram of a controller of a rotor side converter of a doubly-fed wind turbine;
FIG. 3 is a block diagram of a controller of a grid-side converter of a doubly-fed wind turbine;
FIG. 4 is a schematic diagram of the control of the additional damping at the rotor side of the doubly-fed wind turbine;
fig. 5 is a schematic diagram of doubly-fed fan grid side additional damping control.
Detailed Description
FIG. 1 shows a doubly-fed wind power plant system, wherein DFIG denotes a doubly-fed asynchronous wind generator, usabcThe three-phase voltages of the stators a, b and c are obtained; u. ofrabcThe three-phase voltages of the rotors a, b and c are obtained; u. ofgabcThree-phase voltages of a, b and c of the grid-side converter are obtained; u. ofdcIs the dc bus capacitor voltage. i.e. isabcThree-phase currents of stators a, b, c, irabcFor three-phase currents of rotors a, b, c, ilabcFor three-phase currents of lines a, b, c, igabcThree-phase current flows through the grid-side converters a, b and c. 1. A rotor side converter 2, a network side converter 3 and a network side filter.
In FIG. 2, kp_irAnd ki_irRespectively a proportional coefficient and an integral coefficient of a current loop of the rotor side converter; i.e. ird_refAnd irq_refD-axis component and q-axis component of the given value of the rotor current output by the power loop respectively; k is a radical ofp_pqAnd ki_pqPower loop proportion coefficient and integral coefficient respectively; psAnd QsRespectively outputting active power and reactive power for the double-fed motor; ps_refAnd Qs_refRespectively setting active power and reactive power; u. ofsdIs stator d-axis voltage, urdAnd urqThe d and q axis voltages, i, of the rotorsdAnd isqD and q axis currents, i, of the statorrdAnd irqThe currents of d and q axes of the rotor are respectively; l isrA rotor side inductor; l ismThe stator and the rotor are mutually inducted; omega2Is the rotor current angular frequency.
In FIG. 3, kp_igAnd ki_igRespectively a current loop proportional coefficient and an integral coefficient of the network side converter; k is a radical ofi_dcAnd kp_dcRespectively obtaining an integral coefficient and a proportionality coefficient of the network side direct current voltage loop; i.e. igd_refAnd igq_refThe d-axis component and the q-axis component of the given value of the grid side current are respectively. u. ofgAnd igThe network side converter voltage and current are respectively added with subscripts d, q respectively representing d-axis components andthe q-axis component. u. ofdcIs the DC bus capacitor voltage udc_refAnd the given value is the voltage of the direct current bus capacitor. ω represents the grid current angular frequency and L represents the filter inductance.
The first embodiment is as follows: the doubly-fed wind turbine generator subsynchronous resonance suppression method based on converter cooperative damping control comprises the following steps:
the method comprises the following steps: stator current signal i is collected through stator current sensor of doubly-fed generator stator windings_abcCollecting the current i of the network side converter by the current sensor of the network side converterg_abc。
Step two: the stator current signal is_abcAnd the grid side converter current ig_abcObtaining a stator current signal i under a synchronous rotation system through Clark conversion and Park conversion in sequences_dqAnd the grid side converter current ig_dq。
Step three: elimination of i by means of a second-order high-pass filters_dqAnd ig_dqAnd (3) respectively extracting d-axis and q-axis disturbance components of the stator current and d-axis and q-axis disturbance components of the network side converter under the influence of the medium direct current component, wherein the transfer function of the second-order high-pass filter is as follows:
wherein, ω isnRepresenting a natural angular frequency; xi represents a damping ratio, and the value is 0.02; s represents the laplacian operator.
Step four: inputting d and q axis disturbance components of stator current into a proportional amplifier to obtain a rotor voltage additional signal, inputting d and q axis disturbance components of a network side converter into the proportional amplifier to obtain a network side converter current reference additional signal, and obtaining a rotor side proportionality coefficient of the proportional amplifier
The value range of (1) is 0.03 to 0.21, and the net side proportionality coefficient
The value range of (a) is from 0.15 to 0.23.
Step five: and loading the rotor voltage additional signal into an output signal of the rotor side current control loop, and loading the grid side converter current reference additional signal into an input signal of the grid side current control loop to realize the suppression of the sub-synchronous resonance of the doubly-fed wind turbine generator.
As shown in fig. 4, after introducing damping control on the rotor side, the rotor side current control loop can be expressed as:
as shown in fig. 5, after introducing the damping control on the net side, the net side current control loop can be expressed as:
the invention aims to solve the problem of subsynchronous resonance generated under the condition of series compensation of a doubly-fed wind turbine generator, and solves the problems that hardware equipment is improved, construction difficulty is increased and equipment cost is increased by the conventional subsynchronous resonance inhibiting technology. According to the control characteristics of the doubly-fed wind turbine generator converter, the current disturbance feedback of the stator is selected on the rotor side, the current disturbance feedback of the grid-side converter is selected by the grid-side converter to cooperate with additional damping control to improve the control strategy of the doubly-fed wind turbine generator converter, the parameter setting is flexible, and the doubly-fed wind turbine generator subsynchronous resonance can be effectively inhibited.
Claims (4)
1. The doubly-fed wind turbine generator subsynchronous resonance suppression method based on converter cooperative damping control is characterized by comprising the following steps of:
the method comprises the following steps: stator current signal i of stator winding of doubly-fed generator is collecteds_abcAnd the grid side converter current ig_abc，
Step two: the stator current signal is_abcAnd the grid side converter current ig_abcSequentially carrying out Clark conversion and Park conversionObtaining a stator current signal i under a synchronous rotation systems_dqAnd the grid side converter current ig_dq，
Step three: cancellation of i using high pass filterss_dqAnd ig_dqThe d and q axis disturbance components of the stator current and the d and q axis disturbance components of the network side converter are respectively extracted under the influence of the medium direct current component,
step four: inputting d and q axis disturbance components of the stator current into a proportional amplifier to obtain a rotor voltage additional signal, inputting d and q axis disturbance components of the grid-side converter into the proportional amplifier to obtain a grid-side converter current reference additional signal,
step five: and loading the rotor voltage additional signal into an output signal of the rotor side current control loop, and loading the grid side converter current reference additional signal into an input signal of the grid side current control loop to realize the suppression of the sub-synchronous resonance of the doubly-fed wind turbine generator.
2. The converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method of claim 1, characterized in that in the first step, a stator current signal i is acquired through a stator current sensor of a stator winding of a doubly-fed generators_abcCollecting the current i of the network side converter by the current sensor of the network side converterg_abc。
3. The converter collaborative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method according to claim 1, wherein the high-pass filter in the step three is a second-order high-pass filter, and a transfer function of the second-order high-pass filter is as follows:
wherein, ω isnRepresenting a natural angular frequency; xi represents a damping ratio, and the value is 0.02; s represents the laplacian operator.
4. According to the rightThe method for suppressing the sub-synchronous resonance of the doubly-fed wind turbine generator based on the converter cooperative damping control according to claim 1, wherein the rotor-side proportional coefficient of the proportional amplifier in the fourth step
The value range of (1) is 0.03 to 0.21, and the net side proportionality coefficient
The value range of (a) is from 0.15 to 0.23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503606.5A CN108631337B (en) | 2018-05-23 | 2018-05-23 | Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503606.5A CN108631337B (en) | 2018-05-23 | 2018-05-23 | Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108631337A CN108631337A (en) | 2018-10-09 |
| CN108631337B true CN108631337B (en) | 2021-03-09 |
Family
ID=63690169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810503606.5A Expired - Fee Related CN108631337B (en) | 2018-05-23 | 2018-05-23 | Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631337B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600090A (en) * | 2018-12-07 | 2019-04-09 | 中车青岛四方车辆研究所有限公司 | Double-fed generator current transformer control algolithm and system |
| CN109473997A (en) * | 2018-12-10 | 2019-03-15 | 华北电力大学 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control |
| EP3861631B1 (en) * | 2018-12-19 | 2022-07-13 | Siemens Gamesa Renewable Energy Innovation & Technology, S.L. | Method and system of subsynchronous oscillations and interactions damping |
| CN109755964B (en) * | 2019-03-18 | 2022-06-07 | 哈尔滨工业大学 | Control method for improving stability of double-fed wind turbine generator under weak grid condition |
| CN111082682A (en) * | 2019-12-23 | 2020-04-28 | 湖北文理学院 | LCL filtering-based cooperative control system and method for voltage type PWM rectifier |
| CN111245013B (en) * | 2020-02-27 | 2022-05-13 | 华北电力大学 | DFIG subsynchronous oscillation suppression method based on multi-branch impedance remodeling |
| CN111313436A (en) * | 2020-03-23 | 2020-06-19 | 云南电网有限责任公司 | Wind power system control method and device for avoiding resonance |
| CN112165106A (en) * | 2020-10-10 | 2021-01-01 | 国网黑龙江省电力有限公司电力科学研究院 | DFIG subsynchronous oscillation suppression method based on biquadratic generalized integrator |
| CN113067371B (en) * | 2021-03-25 | 2022-10-21 | 哈尔滨工业大学 | Subsynchronous oscillation suppression method for direct-drive permanent magnet wind turbine generator compensated by machine side converter |
| CN112838589A (en) * | 2021-03-25 | 2021-05-25 | 哈尔滨工业大学 | Subsynchronous oscillation suppression method for voltage source type doubly-fed wind turbine generator under series compensation power grid |
| CN114123234A (en) * | 2021-09-30 | 2022-03-01 | 国网电力科学研究院有限公司 | Subsynchronous oscillation suppression method and system based on active oscillation current blocking and storage medium |
| CN115693712B (en) * | 2023-01-05 | 2023-03-21 | 国网辽宁省电力有限公司电力科学研究院 | DFIG-RSC subsynchronous oscillation suppression method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790288A (en) * | 2016-04-26 | 2016-07-20 | 国网冀北电力有限公司电力科学研究院 | Control method and device of restraining sub-synchronous resonance |
| CN107147132A (en) * | 2017-05-02 | 2017-09-08 | 国网四川省电力公司技能培训中心 | A kind of control method for suppressing double-fed fan motor unit subsynchronous resonance |
-
2018
- 2018-05-23 CN CN201810503606.5A patent/CN108631337B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790288A (en) * | 2016-04-26 | 2016-07-20 | 国网冀北电力有限公司电力科学研究院 | Control method and device of restraining sub-synchronous resonance |
| CN107147132A (en) * | 2017-05-02 | 2017-09-08 | 国网四川省电力公司技能培训中心 | A kind of control method for suppressing double-fed fan motor unit subsynchronous resonance |
Non-Patent Citations (1)
| Title |
|---|
| Sub-Synchronous Interaction Damping Control for DFIG Wind Turbines;Andres E. Leon;《IEEE TRANSACTIONS ON POWER SYSTEMS》;20150131;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108631337A (en) | 2018-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108631337B (en) | Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method | |
| CN109120001B (en) | Doubly-fed wind power plant grid-connected system subsynchronous oscillation suppression method based on virtual resistor | |
| CN107425539B (en) | Enhanced low-voltage ride-through control method of doubly-fed wind turbine generator under asymmetric power grid fault | |
| CN108683198B (en) | Voltage control type virtual synchronization method of double-fed wind generating set | |
| CN100527595C (en) | Current non-delay control method of AC excitation double-fed asynchronous wind power generator rotor | |
| CN101141110A (en) | Variable speed constant frequency dual-feed asynchronous wind power generator rotor current non-delay control method | |
| CN112448398B (en) | Stator side analog resistance-based doubly-fed wind power plant subsynchronous oscillation suppression method | |
| CN111654062B (en) | Virtual synchronization control method and system of double-fed wind generating set | |
| CN107124126B (en) | Phase-loop-free current control method and device for doubly-fed induction generator | |
| CN104242759B (en) | Double-fed wind power generation system based on vector power system stabilizer | |
| CN112671009B (en) | Double-fed fan subsynchronous oscillation suppression method with additional damping controller | |
| CN104579060B (en) | The indirect power control method of cage-type rotor brushless dual-feedback wind power generator | |
| CN107658911B (en) | Control method for enhancing low voltage ride through of permanent magnet direct-drive wind turbine generator under asymmetric power grid fault | |
| CN107565599B (en) | Wind power grid-connected semi-physical simulation system based on VSG | |
| CN101141111A (en) | Dual-feed asynchronous wind power generator rotor current non-delay control method | |
| CN112838589A (en) | Subsynchronous oscillation suppression method for voltage source type doubly-fed wind turbine generator under series compensation power grid | |
| WO2023045469A1 (en) | Power grid frequency detection method, apparatus, power grid frequency adjustment method, and apparatus | |
| CN107579529A (en) | A kind of subsynchronous suppressing method of synchronous machine based on the optimization of grid-connection converter phaselocked loop | |
| CN109755964B (en) | Control method for improving stability of double-fed wind turbine generator under weak grid condition | |
| CN108321844A (en) | The control method of permanent magnet direct-drive wind generator system under harmonic voltage | |
| CN117439114B (en) | Broadband oscillation suppression method and system for net-structured direct-drive fan | |
| CN104865523A (en) | Doubly-fed generator simulation system and method | |
| CN112165106A (en) | DFIG subsynchronous oscillation suppression method based on biquadratic generalized integrator | |
| CN108199394A (en) | The sub-synchronous oscillation suppression method and device of Wind turbines | |
| CN104993756B (en) | The failure operation method of double-fed wind power generator rotor magnetic linkage weak magnetic control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |