CN107026477A - The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation - Google Patents

The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation Download PDF

Info

Publication number
CN107026477A
CN107026477A CN201710382872.2A CN201710382872A CN107026477A CN 107026477 A CN107026477 A CN 107026477A CN 201710382872 A CN201710382872 A CN 201710382872A CN 107026477 A CN107026477 A CN 107026477A
Authority
CN
China
Prior art keywords
control
phase
voltage
point
common coupling
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.)
Pending
Application number
CN201710382872.2A
Other languages
Chinese (zh)
Inventor
张兴
李明
杨莹
张行
李飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei University of Technology
Original Assignee
Hefei University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hefei University of Technology filed Critical Hefei University of Technology
Priority to CN201710382872.2A priority Critical patent/CN107026477A/en
Publication of CN107026477A publication Critical patent/CN107026477A/en
Pending legal-status Critical Current

Links

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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

Abstract

The invention discloses a kind of light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation.The present invention is directed in the case of light current net directly to be feedovered caused combining inverter stability problem using line voltage, propose a kind of control method of voltage feed-forward control lag compensation, this method on voltage feed-forward control passage by way of increasing LPF link, it ensure that combining inverter is identical with the fundamental wave gain of the direct feedforward control of line voltage, realize being tracked without steady-state error for fundamental wave.The present invention can not only suppress power network background harmonicses, and be added significantly to phase margin of the combining inverter in the case of light current net, improve the grid adaptability of combining inverter.

Description

The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation
Technical field
The present invention relates to the control method of grid-connected inverter system, there is line voltage more particularly, to a kind of light current is off the net The control method of grid-connected inverter for the lag compensation that feedovers.
Background technology
With developing rapidly for distributed generation system, combining inverter is used widely.Due in remoteness In distributed generation system, the presence of long range transmission line and a large amount of potential devices can bring one can not ignore to power network Equiva lent impedance so that light current net characteristic is presented in power network.In the case of the light current net with high impedance, meeting between inverter and power network A dynamic interacted system is formed, the system can be made in its point of common coupling (point of common coupling, PCC) Decline into combining inverter control system bandwidth, influence its control stability.Combining inverter is directly feedovered using line voltage Current harmonics that can be caused by effective compensation power network background harmonicses is so as to obtain a wide range of applications, but there have document to point out to be weak The stability margin of combining inverter can be greatly reduced using the direct feedforward control of line voltage under grid condition, may be caused grid-connected Inverter is unstable, and such as Xu Jin inscriptions, Xie Shaojun and Tang Ting are published in August in 2014 25《Proceedings of the CSEE》34th Roll up on the 24th phase《Light current LCL filtering combining inverters self-adaptive current control off the net》, this article points out light current power network off the net electricity Pressure ratio example feedforward can form positive feedback passage, and the stability margin of LCL type combining inverter is greatly reduced, system is even resulted in unstable It is fixed.
Therefore, money is strong, Xie Shaojun and Ji Lin etc. are published on November 20th, 2016《Proceedings of the CSEE》Volume 36 On 22nd phase《A kind of Current Control Strategy for lifting inverter to power network adaptability》, this article is pointed out can be by reducing electricity The feedforward gain of net voltage, to improve the stability margin of combining inverter, this method improves parallel network reverse to a certain extent The stability of device, but this method can make combining inverter that fundamental wave gain is greatly reduced, and be unfavorable for fundamental wave tracking, add grid-connected Steady-state error between current feedback values and command value.
In addition, combining inverter stability can be improved by reducing the bandwidth of phaselocked loop light current is off the net, such as：Wu Permanent, Ruan Xinbo and Yang Dongsheng are published on October 25th, 2014《Proceedings of the CSEE》On the 30th phase of volume 34《Light current Influence research and pll parameter design of the phaselocked loop to LCL type combining inverter stability under the conditions of net》, this article is according to phase angle Margin requirement is designed to the parameter of phaselocked loop, changes the bandwidth of phaselocked loop, enhances inverter under current source mode To the adaptability of different electric network impedances, but this kind of method significantly reduces the rapidity that combining inverter locks phase, now, if Electric network impedance is very big, in order that combining inverter stable operation, bandwidth of phase lock loop needs to be transferred to very low, now, is not suitable for The high occasion of dynamic performance requirements.
In summary, there is problems with prior art：
(1) weak grid condition is directed to, existing literature can cause grid-connected inverse using the method for the direct feedforward control of line voltage The stability for becoming device is greatly reduced, can be with lifting system stability by the feedforward gain for reducing line voltage, but this method Fundamental wave gain can be reduced, the steady-state error between grid-connected current feedback value and command value is added, is unfavorable for fundamental wave tracking；
(2) in the existing control program based on voltage feed-forward control, it is not directed to by voltage feed-forward control passage Addition LPF link constitutes voltage feed-forward control lag compensation to realize the problem of grid-connected inverters are stable.
The content of the invention
To overcome the limitation of above-mentioned various technical schemes, for being led in the case of light current net using line voltage directly feedforward The combining inverter stability problem of cause, proposes a kind of control method of voltage feed-forward control lag compensation, this method by Increase the mode of LPF link on voltage feed-forward control passage, it is ensured that combining inverter and line voltage directly feedover control The fundamental wave gain of system is identical, realizes being tracked without steady-state error for fundamental wave.The present invention can not only suppress power network background harmonicses, and And phase margin of the combining inverter in the case of light current net is added significantly to, improve the grid adaptability of combining inverter.
The object of the present invention is achieved like this.It is off the net delayed with voltage feed-forward control that the present invention proposes a kind of light current The control method of grid-connected inverter of compensation, the key step of this control method is as follows：
Step 1, collection output grid-connected current iga、igb、igc, and point of common coupling voltage upcca、upccb、upccc；
Step 2, the point of common coupling voltage u gathered according to step 1pcca、upccb、upccc, through three-phase static coordinate system to two The transformation equation of cordic phase rotator system obtains point of common coupling voltage dq axis components upccd、upccq；By point of common coupling voltage upcca、upccb、upcccPoint of common coupling voltage phase angle θ is mutually obtained by phase-locked loop pll lock；
The point of common coupling voltage is by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Step 3, the point of common coupling voltage phase angle θ obtained according to step 2, rotates by three-phase static coordinate system to two-phase The conversion of coordinate system, the output grid-connected current i that step 1 is gatheredga、igb、igcIt is converted into output under two-phase rotating coordinate system simultaneously Net electric current dq components igdAnd igq；
It is described output grid-connected current be by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Step 4, output grid-connected current command signal i is setgdref, igqref；The output grid-connected current obtained according to step 3 Dq components igdAnd igq, control signal u is obtained by power network current closed-loop control equationdAnd uq；
The power network current closed-loop control equation is：
ud=(kp+ki/s)·(igdref-igd)
uq=(kp+ki/s)·(igqref-igq)
K in formulapFor electric current loop pi regulator proportional control factor, kiFor electric current loop pi regulator integral control coefficient, s For Laplace operator；
Step 5, the point of common coupling voltage phase angle θ obtained according to step 2, the control signal u that step 4 is obtaineddAnd uqThrough Two-phase rotating coordinate system is crossed to the transformation equation of three-phase static coordinate system, the control signal point under three-phase static coordinate system is converted into Measure ua、ub、uc；
The control signal is by the transformation equation of two-phase rotating coordinate system to three-phase static coordinate system：
ua=udcosθ-uqsinθ
Step 6, the point of common coupling voltage u obtained according to step 1pcca、upccb、upccc, it is delayed by voltage feed-forward control Equation is compensated, voltage feed-forward control signal u is obtainedpcca_f、upccb_f、upccc_f；
The voltage feed-forward control lag compensation equation is：
K in formulapwmFor the PWM inversion link gains of three-phase full-bridge inverter, ωcFor cutting that voltage feed-forward control is filtered Only frequency；
Step 7, the control signal component u under the three-phase static coordinate system obtained according to step 5a、ub、uc, respectively with step 6 obtained voltage feed-forward control signal upcca_f、upccb_f、upccc_fIt is added, obtains three-phase full-bridge inverter bridge arm voltage control letter Number, then the switching signal for generating power device of inverter is modulated by SVPWM, control three phase full bridge inverse by Drive Protecting Circuit Become turning on and off for device power device.
Preferably, point of common coupling voltage phase angle θ calculation formula is described in step 2：
Wherein ω0For the specified angular frequency of point of common coupling voltage, Kp_PLLAnd Ki_PLLRespectively phaselocked loop pi regulator Proportional control factor and integral adjustment coefficient, s is Laplace operator.
Compared with prior art, the advantageous effect of present invention is that：
1st, the present invention can not only suppress power network background harmonicses, and be added significantly to combining inverter in weak grid condition Under phase margin, improve the stability of inverter；
2nd, present invention improves reduction line voltage feedforward gain control program exist fundamental wave gain reduction the problem of, It ensure that being tracked without steady-state error for light current combining inverter fundamental wave off the net；
3rd, the limit of combining inverter control system closed loop transfer function, of the invention is improved farther away from RHP Combining inverter adds the grid adaptability of combining inverter in light current stability off the net；
4th, the present invention need to only be realized on voltage feed-forward control passage plus a LPF link composition lag compensation Mode is simple and effective.
Brief description of the drawings
Topological structure when the three-phase LCL type combining inverter that Fig. 1 is used by the embodiment of the present invention is connected with light current net Schematic diagram.
Fig. 2 is the light current of the present invention combining inverter control structure schematic diagram off the net that feedforward is filtered based on line voltage.
Fig. 3 is the Bode diagram of the open-loop transfer function under different electric network impedances in the direct feedforward control of line voltage.
Fig. 4 is the baud of the open-loop transfer function under different electric network impedances when adding voltage feed-forward control filtering control Figure.
Fig. 5 is combining inverter closed loop transfer function, with pole distribution figure when electric network impedance changes.
Inverter output grid-connected current harmonic spectrogram when Fig. 6 is feedforward control direct using line voltage.
Fig. 7 is inverter output grid-connected current harmonic spectrogram when filtering feedforward control using line voltage.
Embodiment
The embodiment provides a kind of light current combining inverter off the net with voltage feed-forward control lag compensation Using combining inverter caused by line voltage directly feedforward in the case of control method, the light current net to solve prior art presence Stability problem, on voltage feed-forward control passage increase LPF link by way of, it is ensured that combining inverter with The fundamental wave gain of the direct feedforward control of line voltage is identical, realizes being tracked without steady-state error for fundamental wave.The present invention can not only Suppress power network background harmonicses, and be added significantly to phase margin of the combining inverter in the case of light current net, improve grid-connected The grid adaptability of inverter.
Clear, complete description is carried out to technical scheme below in conjunction with accompanying drawing.
The topological structure that the embodiment of the present invention is used is as shown in Figure 1.The topological structure includes DC side filter capacitor Cdc、 Three-phase bridge type inverse topology, inverter side inductance L1, filter capacitor C, damping resistance Rd, net side inductance L2, LCL type wave filter lead to Point of common coupling PCC is crossed with carrying electric network impedance ZgThree phase network be connected, rgFor electric network impedance ZgResistive component, LgFor electricity Net impedance ZgPerceptual weight, rgAnd LgConstitute electric network impedance Zg, electric network impedance ZgExpression formula is as follows：
Zg=rg+s·Lg
S in formula is Laplace operator.In the present embodiment, Cdc=600 μ F, L1=0.9mH, C=40 μ F, Rd=0.15 Ω, L2=0.1mH, rg=0, Lg=1.2mH.
Fig. 2 is the light current combining inverter control structure schematic diagram off the net that feedforward is filtered based on line voltage.Can by Fig. 2 See, the present invention is made up of following steps：
Step 1, collection output grid-connected current iga、igb、igc, and point of common coupling voltage upcca、upccb、upccc。
Step 2, the point of common coupling voltage u gathered according to step 1pcca、upccb、upccc, through three-phase static coordinate system to two The transformation equation of cordic phase rotator system obtains point of common coupling voltage dq axis components upccd、upccq；By point of common coupling voltage upcca、upccb、upcccPoint of common coupling voltage phase angle θ is mutually obtained by phase-locked loop pll lock.
Point of common coupling is by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Point of common coupling voltage phase angle θ calculation formula is：
Wherein ω0For the specified angular frequency of point of common coupling voltage, Kp_PLLAnd Ki_PLLRespectively phaselocked loop pi regulator Proportional control factor and integral adjustment coefficient, s is Laplace operator.In the present embodiment, ω0=314rad/s, Kp_PLL= 2000, Ki_PLL=1.
Step 3, the point of common coupling voltage phase angle θ obtained according to step 2, rotates by three-phase static coordinate system to two-phase The conversion of coordinate system, the output grid-connected current i that step 1 is gatheredga、igb、igcIt is converted into output under two-phase rotating coordinate system simultaneously Net electric current dq components igdAnd igq；
Export grid-connected current is by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Step 4, output grid-connected current command signal i is setgdref, igqref；The output grid-connected current obtained according to step 3 Dq components igdAnd igq, control signal u is obtained by power network current closed-loop control equationdAnd uq；
Power network current closed-loop control equation is：
ud=(kp+ki/s)·(igdref-igd)
uq=(kp+ki/s)·(igqref-igq)
K in formulapFor electric current loop pi regulator proportional control factor, kiFor electric current loop pi regulator integral control coefficient, s For Laplace operator.
Step 5, the point of common coupling voltage phase angle θ obtained according to step 2, the control signal u that step 4 is obtaineddAnd uqThrough Two-phase rotating coordinate system is crossed to the transformation equation of three-phase static coordinate system, the control signal point under three-phase static coordinate system is converted into Measure ua、ub、uc。
Control signal is by the transformation equation of two-phase rotating coordinate system to three-phase static coordinate system：
ua=udcosθ-uqsinθ
Step 6, the point of common coupling voltage u obtained according to step 1pcca、upccb、upccc, it is delayed by voltage feed-forward control Equation is compensated, voltage feed-forward control signal u is obtainedpcca_f、upccb_f、upccc_f。
Voltage feed-forward control lag compensation equation is：
K in formulapwmFor the PWM inversion link gains of three-phase full-bridge inverter, ωcFor cutting that voltage feed-forward control is filtered Only frequency.The present embodiment Kpwm=1, ωc=3140rad/s.
Step 7, the component u under the three-phase static coordinate system obtained according to step 5a、ub、uc, obtained respectively with step 6 Voltage feed-forward control signal upcca_f、upccb_f、upccc_fIt is added, obtains three-phase full-bridge inverter bridge arm voltage control signal difference For：ua+upcca_f、ub+upccb_f、uc+upccc_f, then the switching signal for generating power device of inverter is modulated by SVPWM, pass through Drive Protecting Circuit controls turning on and off for three-phase full-bridge inverter power device.
Fig. 3 is to be of the invention in the direct feedforward control of line voltage, and electric network impedance is followed successively by Lg=1.2mH, 2.4mH, The Bode diagram of open-loop transfer function during 3.6mH.Fig. 4 is to be of the invention when adding voltage feed-forward control lag compensation, and power network hinders It is anti-to be followed successively by LgThe Bode diagram of open-loop transfer function when=1.2mH, 2.4mH, 3.6mH.Wherein, PM represents phase in Fig. 3 and Fig. 4 Position nargin (phase margin, PM).Comparison diagram 3 and Fig. 4, can significantly have found：The side directly feedovered using line voltage Formula, with the increase of electric network impedance, the phase margin PM of combining inverter is gradually reduced, delayed by introducing voltage feed-forward control Phase margin PM is significantly increased after compensation；Also, introduce voltage feed-forward control filtering control strategy and do not change open loop transmission letter Gain at several low frequencies, it is ensured that the fundamental wave tracking performance of combining inverter.
Fig. 5 show combining inverter closed loop transfer function, with electric network impedance LgLimit when increasing to 4.8mH by 1.2 Distribution map.The direction of arrow represents electric network impedance L in Fig. 5gThe direction of increase, what region 1 was represented is to add voltage feed-forward control to mend The pole distribution of closed loop transfer function, when repaying, what region 2 was represented is closed loop transfer function, when directly being feedovered using line voltage Pole distribution.Closed loop is passed when adding voltage feed-forward control lag compensation with directly being feedovered using line voltage in Fig. 5 by comparing The pole distribution position of delivery function, it can be found that voltage feed-forward control lag compensation control strategy proposed by the present invention can make to close Central pole effectively improves inverter in light current stability off the net away from RHP.
Fig. 6 and Fig. 7 sets forth using the direct feedforward control of line voltage and add voltage feed-forward control lag compensation When inverter output grid-connected current and corresponding harmonic spectrum figure.Comparison diagram 6 and Fig. 7 can be found that light current proposed by the present invention Control method of grid-connected inverter off the net with voltage feed-forward control lag compensation can be effectively improved light current inverter off the net Grid-connected current quality, improves the stability of combining inverter.

Claims (2)

1. a kind of light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation, it is characterised in that this The key step of control method is as follows：
Step 1, collection output grid-connected current iga、igb、igc, and point of common coupling voltage upcca、upccb、upccc；
Step 2, the point of common coupling voltage u gathered according to step 1pcca、upccb、upccc, revolved through three-phase static coordinate system to two-phase The transformation equation for turning coordinate system obtains point of common coupling voltage dq axis components upccd、upccq；By point of common coupling voltage upcca、 upccb、upcccPoint of common coupling voltage phase angle θ is mutually obtained by phase-locked loop pll lock；
The point of common coupling voltage is by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Step 3, the point of common coupling voltage phase angle θ obtained according to step 2, by three-phase static coordinate system to two cordic phase rotators The conversion of system, the output grid-connected current i that step 1 is gatheredga、igb、igcThe grid-connected electricity of output being converted under two-phase rotating coordinate system Flow dq components igdAnd igq；
It is described output grid-connected current be by the transformation equation of three-phase static coordinate system to two-phase rotating coordinate system：
Step 4, output grid-connected current command signal i is setgdref, igqref；The output grid-connected current dq components obtained according to step 3 igdAnd igq, control signal u is obtained by power network current closed-loop control equationdAnd uq；
The power network current closed-loop control equation is：
ud=(kp+ki/s)·(igdref-igd)
uq=(kp+ki/s)·(igqref-igq)
K in formulapFor electric current loop pi regulator proportional control factor, kiFor electric current loop pi regulator integral control coefficient, s is drawing General Laplacian operater；
Step 5, the point of common coupling voltage phase angle θ obtained according to step 2, the control signal u that step 4 is obtaineddAnd uqBy two Cordic phase rotator is tied to the transformation equation of three-phase static coordinate system, is converted into the control signal component under three-phase static coordinate system ua、ub、uc；
The control signal is by the transformation equation of two-phase rotating coordinate system to three-phase static coordinate system：
ua=udcosθ-uqsinθ
Step 6, the point of common coupling voltage u obtained according to step 1pcca、upccb、upccc, pass through voltage feed-forward control lag compensation Equation, obtains voltage feed-forward control signal upcca_f、upccb_f、upccc_f；
The voltage feed-forward control lag compensation equation is：
K in formulapwmFor the PWM inversion link gains of three-phase full-bridge inverter, ωcThe cutoff frequency filtered for voltage feed-forward control Rate；
Step 7, the control signal component u under the three-phase static coordinate system obtained according to step 5a、ub、uc, obtained respectively with step 6 The voltage feed-forward control signal u arrivedpcca_f、upccb_f、upccc_fIt is added, obtains three-phase full-bridge inverter bridge arm voltage control signal, The switching signal of generation power device of inverter is modulated by SVPWM again, three phase full bridge inversion is controlled by Drive Protecting Circuit Device power device is turned on and off.
2. a kind of light current according to claim 1 combining inverter control off the net with voltage feed-forward control lag compensation Method, it is characterised in that point of common coupling voltage phase angle θ calculation formula is described in step 2：
Wherein ω0For the specified angular frequency of point of common coupling voltage, Kp_PLLAnd Ki_PLLThe respectively ratio of phaselocked loop pi regulator Adjustment factor and integral adjustment coefficient, s is Laplace operator.
CN201710382872.2A 2017-05-26 2017-05-26 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation Pending CN107026477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710382872.2A CN107026477A (en) 2017-05-26 2017-05-26 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710382872.2A CN107026477A (en) 2017-05-26 2017-05-26 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation
CN201710770173.5A CN107332281B (en) 2017-05-26 2017-08-31 With the control method of grid-connected inverter of voltage feed-forward control lag compensation under weak grid

Publications (1)

Publication Number Publication Date
CN107026477A true CN107026477A (en) 2017-08-08

Family

ID=59529391

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201710382872.2A Pending CN107026477A (en) 2017-05-26 2017-05-26 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation
CN201710770173.5A Active CN107332281B (en) 2017-05-26 2017-08-31 With the control method of grid-connected inverter of voltage feed-forward control lag compensation under weak grid

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201710770173.5A Active CN107332281B (en) 2017-05-26 2017-08-31 With the control method of grid-connected inverter of voltage feed-forward control lag compensation under weak grid

Country Status (1)

Country Link
CN (2) CN107026477A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107332281A (en) * 2017-05-26 2017-11-07 合肥工业大学 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation
CN107370192A (en) * 2017-07-25 2017-11-21 合肥工业大学 The light current multiple inverter system stability of grid connection control method off the net based on power detection
CN107425547A (en) * 2017-08-28 2017-12-01 国网江苏省电力公司徐州供电公司 A kind of inverter and the synchronous method of external electrical network, device, inverter and computer-readable storage medium
CN107611997A (en) * 2017-09-22 2018-01-19 中国南方电网有限责任公司 A kind of subsynchronous suppressing method of synchronous generator and system
CN107732961A (en) * 2017-09-22 2018-02-23 中国南方电网有限责任公司 A kind of method that sub-synchronous oscillation suppression is realized based on grid-connection converter control
CN107834594A (en) * 2017-11-07 2018-03-23 合肥工业大学 The light current voltage feed-forward control control method off the net based on weighing first order inertial element
CN107895966A (en) * 2017-11-07 2018-04-10 合肥工业大学 The light current electric voltage feed forward lag compensation control method off the net based on impedance self-adaptive
CN107968590A (en) * 2017-11-23 2018-04-27 湖南大学 A kind of phase angle compensation control method of light current three-phase LCL type gird-connected inverters off the net
CN107994605A (en) * 2017-11-27 2018-05-04 浙江大学 A kind of grid-connected inverter system method for analyzing stability based on harmonics matrix transmission function
CN107994606A (en) * 2017-11-27 2018-05-04 浙江大学 Grid-connected inverter system method for analyzing stability under a kind of multi-frequency coupling factor Coexistence Situation
CN108429284A (en) * 2018-03-29 2018-08-21 合肥工业大学 The harmonic voltage ratio feedforward compensation method of double-fed fan motor unit is exported based on voltage source
CN109004674A (en) * 2018-08-02 2018-12-14 东北电力大学 Inverter end overvoltage calculation method caused by a kind of chugging
CN109245167A (en) * 2018-10-29 2019-01-18 国网重庆市电力公司电力科学研究院 Improve the control method of LCL type gird-connected inverter grid-connected current quality under weak grid
CN110729729A (en) * 2019-11-14 2020-01-24 山东大学 Voltage feed-forward link action analysis method for voltage source type converter under weak grid connection
CN112054548A (en) * 2020-06-23 2020-12-08 湖南大学 Control method and system for LCC-HVDC power transmission system for new energy power generation
CN113328458A (en) * 2020-12-15 2021-08-31 新疆金风科技股份有限公司 Feedforward control method and device for grid-connected inverter and computer readable storage medium
CN112054548B (en) * 2020-06-23 2022-06-07 湖南大学 Control method and system for LCC-HVDC power transmission system for new energy power generation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108988343B (en) * 2018-08-31 2021-04-16 湖南大学 Global high-frequency oscillation suppression method for multi-inverter grid-connected system under weak grid
CN109950926B (en) * 2019-03-19 2020-10-27 合肥工业大学 Grid-connected inverter stability control method based on q-axis voltage integral feedforward under weak network
CN110112776B (en) * 2019-05-07 2020-09-25 郑州轻工业学院 Grid-connected inverter power grid impedance identification method considering power grid background harmonic waves
CN110311416B (en) * 2019-06-14 2020-09-01 合肥工业大学 Phase-locked loop bandwidth self-adaptive grid-connected inverter control method based on state feedback
CN110829483B (en) * 2019-09-26 2021-05-28 西安交通大学 Phase-shifting phase-locked loop method based on back electromotive force observer
CN113113933B (en) * 2021-06-11 2021-08-17 四川大学 Active damping control method and system for LCL inverter of weak power grid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107026477A (en) * 2017-05-26 2017-08-08 合肥工业大学 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107332281B (en) * 2017-05-26 2019-11-29 合肥工业大学 With the control method of grid-connected inverter of voltage feed-forward control lag compensation under weak grid
CN107332281A (en) * 2017-05-26 2017-11-07 合肥工业大学 The light current control method of grid-connected inverter off the net with voltage feed-forward control lag compensation
CN107370192A (en) * 2017-07-25 2017-11-21 合肥工业大学 The light current multiple inverter system stability of grid connection control method off the net based on power detection
CN107370192B (en) * 2017-07-25 2019-12-03 合肥工业大学 Multiple inverter system stability of grid connection control method under weak grid based on power detection
CN107425547A (en) * 2017-08-28 2017-12-01 国网江苏省电力公司徐州供电公司 A kind of inverter and the synchronous method of external electrical network, device, inverter and computer-readable storage medium
CN107732961A (en) * 2017-09-22 2018-02-23 中国南方电网有限责任公司 A kind of method that sub-synchronous oscillation suppression is realized based on grid-connection converter control
CN107611997B (en) * 2017-09-22 2020-09-08 中国南方电网有限责任公司 Subsynchronous suppression method and subsynchronous suppression system for synchronous generator
CN107611997A (en) * 2017-09-22 2018-01-19 中国南方电网有限责任公司 A kind of subsynchronous suppressing method of synchronous generator and system
CN107834594A (en) * 2017-11-07 2018-03-23 合肥工业大学 The light current voltage feed-forward control control method off the net based on weighing first order inertial element
CN107895966A (en) * 2017-11-07 2018-04-10 合肥工业大学 The light current electric voltage feed forward lag compensation control method off the net based on impedance self-adaptive
CN107895966B (en) * 2017-11-07 2020-05-01 合肥工业大学 Impedance self-adaption based voltage feedforward hysteresis compensation control method under weak power grid
CN107968590A (en) * 2017-11-23 2018-04-27 湖南大学 A kind of phase angle compensation control method of light current three-phase LCL type gird-connected inverters off the net
CN107994606A (en) * 2017-11-27 2018-05-04 浙江大学 Grid-connected inverter system method for analyzing stability under a kind of multi-frequency coupling factor Coexistence Situation
CN107994606B (en) * 2017-11-27 2020-03-31 浙江大学 Grid-connected inverter stability analysis method under condition of multi-frequency coupling factor coexistence
CN107994605A (en) * 2017-11-27 2018-05-04 浙江大学 A kind of grid-connected inverter system method for analyzing stability based on harmonics matrix transmission function
CN107994605B (en) * 2017-11-27 2019-10-25 浙江大学 Grid-connected inverter system method for analyzing stability based on harmonics matrix transmission function
CN108429284A (en) * 2018-03-29 2018-08-21 合肥工业大学 The harmonic voltage ratio feedforward compensation method of double-fed fan motor unit is exported based on voltage source
CN109004674B (en) * 2018-08-02 2021-08-20 东北电力大学 Inverter end overvoltage calculation method caused by power sudden change
CN109004674A (en) * 2018-08-02 2018-12-14 东北电力大学 Inverter end overvoltage calculation method caused by a kind of chugging
CN109245167A (en) * 2018-10-29 2019-01-18 国网重庆市电力公司电力科学研究院 Improve the control method of LCL type gird-connected inverter grid-connected current quality under weak grid
CN109245167B (en) * 2018-10-29 2022-03-08 国网重庆市电力公司电力科学研究院 Control method for improving grid-connected current quality of LCL type grid-connected inverter under weak grid
CN110729729B (en) * 2019-11-14 2021-01-05 山东大学 Voltage feed-forward link action analysis method for voltage source type converter under weak grid connection
CN110729729A (en) * 2019-11-14 2020-01-24 山东大学 Voltage feed-forward link action analysis method for voltage source type converter under weak grid connection
CN112054548A (en) * 2020-06-23 2020-12-08 湖南大学 Control method and system for LCC-HVDC power transmission system for new energy power generation
CN112054548B (en) * 2020-06-23 2022-06-07 湖南大学 Control method and system for LCC-HVDC power transmission system for new energy power generation
CN113328458A (en) * 2020-12-15 2021-08-31 新疆金风科技股份有限公司 Feedforward control method and device for grid-connected inverter and computer readable storage medium

Also Published As

Publication number Publication date
CN107332281B (en) 2019-11-29
CN107332281A (en) 2017-11-07

Similar Documents

Publication Publication Date Title
CN107332281B (en) With the control method of grid-connected inverter of voltage feed-forward control lag compensation under weak grid
CN105356507B (en) Based on the adaptive LC type combining inverter double-mode control methods of electric network impedance
CN108039729B (en) Multi-inverter system stability control method based on mode self-adaption in weak grid
CN107317357B (en) The small signal admittance modeling of LCL type gird-connected inverter and method for analyzing stability
CN106981976B (en) The method of T-type three-level three-phase inverter inhibition middle line common mode current
CN107302219B (en) Closed-loop control method for power grid angle of active power filter
WO2017133318A1 (en) Multi-loop switching control system of doubly fed fan based on logic switch control
CN107395040B (en) Decoupling and delay compensation method for complex vector PI controller of grid-connected converter
CN107895966A (en) The light current electric voltage feed forward lag compensation control method off the net based on impedance self-adaptive
CN106684918A (en) Low damping resonant suppression and rapid power adjustment method of LCL inverter
CN108933447B (en) Multi-inverter system parameter self-adaptive control method based on mode switching under weak network
CN102594106A (en) Method for restraining voltage background harmonic wave of grid-connected inverter
CN107834594A (en) The light current voltage feed-forward control control method off the net based on weighing first order inertial element
WO2021169666A1 (en) Resonance control method for differentiated phase correction
CN109193794A (en) A kind of Grid-connected Control Strategy of low-voltage direct micro-capacitance sensor
CN102820884A (en) Control method of single-phase phase locked loop based on second-order integrator
CN111769591B (en) Double-mode combined control method for multi-inverter system based on double split transformers
CN108448583A (en) A kind of modified adjuster applied to light current gird-connected inverter off the net
CN110492774B (en) High-power fractional order impedance element implementation circuit and control method thereof
CN110323775B (en) Damping control method for improving stability of direct current port of flexible direct current power grid
CN106099930A (en) APF system based on LCL type wave filter and control system thereof
CN109327048A (en) A kind of grid-connected converter robust phase-locked system and method
Gao et al. Current multi-loop control strategy for grid-connected inverter with LCL filter
CN107968590A (en) A kind of phase angle compensation control method of light current three-phase LCL type gird-connected inverters off the net
CN109950926B (en) Grid-connected inverter stability control method based on q-axis voltage integral feedforward under weak network

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
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170808

WD01 Invention patent application deemed withdrawn after publication