Optimal control strategy of voltage source converter‐based high‐voltage direct current under unbalanced grid voltage conditions

Sun, Liankun; Yu, Cheng‐Chieh; Wang, Zhe; Ju, Ping; Jin, Yuqing

doi:10.1049/iet-gtd.2015.0749

Cited by 21 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Durağan referans çatıda (STRF) ve SRF'de referans akımın üretmesinde rol oynayan hızlı ve doğru PNS bileşenler özellikle ideal olmayan şebeke durumları şartlarında evirici kontrolünde önemli rol oynamaktadır. Akım kontrolcülerinin giriş sinyallerini oluşturan referans akım sinyalleri üretimi için birçok yazar çeşitli PLL tabanlı PNS üreticilerini önermiştir [14][15][16][17][18][19][20][21]. İkili SOGI (DSOGI) [14], sinyal gecikmesi önleme tabanlı PLL (DSC) [15], ikili senkron referans çatı (DSRF) ya da DDSRF [16,17] gibi PNS akım/gerilim bileşenleri üretmek için sunulmuştur.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Şebekeye bağlı yenilenebilir enerji kaynaklı eviriciler için yeni bir akım kontrol stratejisi

Meral¹,

Çelík²

2019

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

Highlights:Graphical/Tabular Abstract  The proposed fast and robust PNS extractor for reference current generation  The improving dynamic performances of grid connected RESI by use of PCI controller  The providing controllability of activereactive power oscillationsUnbalanced grid voltages include positive and negative sequence (PNS) components. In particular, the negative sequence components that cause oscillations on the control signals, significantly affect the performance of the grid-connected renewable energy source inverters (RESI). In this study, proportional complex integrator (PCI) based current controller is proposed to deal with the disadvantages such as slow dynamic response, steady-state errors and complex structure of the proportional integral (PI) based dual current controller used for the control of grid connected RESI under non-ideal grid voltage conditions. The reference currents based on the active-reactive power reference signals, PNS components and the flexible control parameter are generated for use in control loops. The relationship between the active-reactive power oscillations, which are caused by non-ideal grid conditions, are comprehensively analysed and controlled with a flexible control parameter. An important contribution to similar previous studies is that the PNS voltagecurrent components required for the reference current generation are separated by the proposed fast and robust dual average filter based phase locked loop (DAPLL). The performance of the proposed PCI-based current control strategy is compared and tested with the PI-based dual current control strategy using various case studies. Results:The performance of the proposed PNS extractor, the PI-based dual-current controller and the PCI-based current controller for the control of the grid-dependent inverter has been tested and verified under various scenarios such as phase to phase grid faults, grid voltage harmonics and variation of flexible control parameter. The effectiveness and availability of proposed test system is verified by using PSCAD/EMTDC software. The proposed system is shown in Figure A. Conclusion:One of the important contributions of this study is the PNS voltage and current components required for use in the reference current generation with a novel PNS extractor, which is fast, robust and not affected by harmonic components. The results show that the proposed PCI-based current control strategy improves the dynamic response and stability of grid-connected RESI, minimizing current errors and harmonic components.

show abstract

Section: Gi̇ri̇ş (Introduction)unclassified

Şebekeye bağlı yenilenebilir enerji kaynaklı eviriciler için yeni bir akım kontrol stratejisi

Meral¹,

Çelík²

2019

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

show abstract

“…In Reference [13], a novel method of separating the instantaneous positive and negative sequence components is proposed and well applied for different control objectives of VSC under unbalanced grid voltage. In Reference [14], an optimal active and reactive power control is proposed to achieve multi-objectives for VSC-HVDC under unbalanced grid voltage conditions. A flexible control strategy is proposed in Reference [15] for oscillation control of the active and reactive power by introducing a control parameter k. In Reference [16], an improved model predictive current control for VSC is presented when unbalanced grid voltages occur to reduce power fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions

Liu

Zhai

et al. 2018

Energies

View full text Add to dashboard Cite

This paper presents a power compensation strategy to suppress the double frequency power ripples of Voltage source converter high-voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions. The mathematical control equations of the double frequency ripple power of VSC under unbalanced operating conditions are firstly derived and established, where the dynamic behaviors of the double frequency ripples in active and reactive power are regarded as being driven by current-relevant components and voltage-relevant components, respectively. Based on the equations, a power compensation control strategy of VSC-HVDC is proposed via the passivity-based control with disturbance observer to suppress both the current-relevant and voltage-relevant components in the power ripples. With this control strategy, the double frequency ripples in active and reactive power are suppressed simultaneously and system performance is significantly enhanced with the implementation of the disturbance observer in the passivity-based control. Theoretical stability analysis and simulation cases show the effectiveness and superiority of the proposed strategy.

show abstract

“…In references [11,12], current control strategies in the PS SRF with proportional-integral (PI) plus resonant (PIR) controllers are proposed for modular multi-level converter high voltage DC (MMC-HVDC) system and doubly fed induction generator (DFIG) respectively. In references [13,14], current control strategies in the STP RF are proposed for VSC-HVDC system and MMC respectively, where proportional-resonant (PR) controllers are adopted to realize current tracking function. In references [15,16], current control strategies in the PS SRF with PI plus vector resonant (PIVR) controllers are proposed for DFIG and MMC-HVDC systems respectively.…”

Section: Introductionmentioning

confidence: 99%

“…However, the oscillating amplitude ratio (OAR) of the active power ripple to the reactive power ripple cannot be continuously controlled. In reference [13], an optimal current control strategy under UBGV conditions is proposed for VSC-HVDC system. In reference [37], a flexible current control strategy to realize coordinated control of the power oscillations and the current quality is proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PIDR Sliding Mode Current Control with Online Inductance Estimator for VSC-MVDC System Converter Stations under Unbalanced Grid Voltage Conditions

Yang

Zhang

et al. 2018

Energies

View full text Add to dashboard Cite

This study aims to present a novel proportional-integral-derivative-resonant law-based sliding mode current control strategy with online inductance estimator (PIDR-SMCC-OIE) for voltage source converter medium voltage direct current (VSC-MVDC) system converter stations under unbalanced grid voltage conditions. A generalized current reference calculation method, by which the ratio of the amplitude of the active power ripple to that of the reactive power ripple can be continuously controlled without current distortion is presented. A dynamic model of the current control errors in the positive sequence synchronous reference frame is developed, and a PIDR law-based sliding mode current controller is designed, where derivatives of the current references are obtained by simple algebraic operations. An OIE adopting the dynamic filtering method and gradient algorithm is proposed to further improve system robustness. In this OIE, the converter pole voltages are obtained by computation utilizing the gate signals of the switching devices and the DC bus voltage, so that no additional voltage sensors are needed. To verify effectiveness of the PIDR-SMCC-OIE strategy, simulation studies on a two-terminal VSC-MVDC system are conducted in PSCAD/EMTDC. The results show it can provide satisfactory performance over a wide range of operating conditions.

show abstract

Optimal control strategy of voltage source converter‐based high‐voltage direct current under unbalanced grid voltage conditions

Cited by 21 publications

References 22 publications

Şebekeye bağlı yenilenebilir enerji kaynaklı eviriciler için yeni bir akım kontrol stratejisi

Şebekeye bağlı yenilenebilir enerji kaynaklı eviriciler için yeni bir akım kontrol stratejisi

Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions

PIDR Sliding Mode Current Control with Online Inductance Estimator for VSC-MVDC System Converter Stations under Unbalanced Grid Voltage Conditions

Contact Info

Product

Resources

About