A Tuning Method of Selective Harmonic Voltage Compensator for Distributed Generators

Zhang, Xiaojie; Liu, Wanjun; Wei, Caimeng; Tian, Li; Li, Kai; Tang, Qibo; He, Yifeng; Lin, Guo

doi:10.1109/pedg.2019.8807531

Cited by 3 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13 shows the Bode and Nyquist plots of T(s) before and after phase adjustment. By including a phase compensation of φ 13 = 0.25π rad in the 13th harmonic control, it becomes feasible to simultaneously adjust the phase at −11th due to the characteristic sharing imposed by frequency coupling [32].…”

Section: Analysis Of Phase Adjustmentmentioning

confidence: 99%

“…Literatures [31][32][33][34][35][36] investigate the issue of harmonic oscillation in SAPF systems with selective harmonic current detection and points out the interaction between source impedance, SAPF, and non-linear loads. They uniformly concluded that the resonance peak of the source impedance located near the harmonic compensation frequency is the cause of harmonic oscillation.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, literature [31] further indicated that the instability is also caused by full harmonic compensation thereby can be eliminated by reducing the compensation ratio. Although sufficient explanation for harmonic oscillation has been proposed, these studies tended to consider the nonlinear load as a Norton model, which means that the dynamic behaviour of the non-linear load cannot be well characterized [32]. In addition, the stabilization strategies proposed for harmonic oscillation mainly focus on active damping schemes [34,35] or sacrificing the harmonic compensation effect in exchange for stability [31,34], which may lead to reappearing instability in case of unpredictable changes in the system parameters [37].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Xie,

Yi,

Zhuo

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

Shunt active power filter (SAPF) has emerged as a promising solution for mitigating harmonic distortions. Due to the interaction between the current inner‐loop of SAPF, source impedance and non‐linear loads, harmonic oscillation issue arises and adversely affects the stability of the system, thus in turn exacerbating the harmonic distortion. However, previous studies paid less attention to the value of phase adjustment in improving the dynamic behaviour of the loop and thus stabilizing harmonic oscillation. Taking the dynamic characteristics between source impedance and non‐linear load into consideration, this paper models and analyzes the SAPF system with source current direct control to reveal the law of full harmonic compensation oscillation. Based on the analysis, an enhanced phase adjustment strategy using load current feedforward is proposed and designed to stabilize harmonic oscillation, while maintaining a favourable trade‐off between stability and harmonic compensation performance. The small‐signal model validated for stability analysis and the effectiveness of proposed stabilization strategy are verified by simulation and experiment.

show abstract

Section: Analysis Of Phase Adjustmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Xie,

Yi,

Zhuo

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…Most of the linear control strategies are based on proportional-integral (PI) controllers, proportional-resonant (PR) controllers, and feedforward control schemes. In [3], SHCs based on a single equivalent synchronous frame are included in the control scheme of a distributed energy resource (DER) in an islanded microgrid to reduce voltage harmonics caused by a nonlinear load. The resulting control scheme reduced the THD of the DER output voltage.…”

mentioning

confidence: 99%

Modeling Lyapunov Control-Based Selective Harmonic Compensated Single-Phase Inverter in the Dynamic Phasor Domain

Nwaneto,

Seif Kashani,

Knight

2023

IEEE Open J. Ind. Applicat.

View full text Add to dashboard Cite

Single-phase grid-forming inverters are commonly used in uninterruptible power supply (UPS) systems that feed singlephase critical loads in homes, data centers, and hospitals. With the increasing use of power electronics-interfaced loads, singlephase UPS inverters are being designed to exhibit characteristics such as low total harmonic distortion (THD) in output voltage, fast dynamic response, and strong robustness against large changes in load, to ensure a seamless operation of critical loads. The Lyapunov-function-based control strategy is a popular method to provide these characteristics in UPS inverters. However, most studies and designs related to Lyapunov-function-controlled single-phase UPS inverters are conducted by using detailed switching models. While detailed switching models accurately represent the true dynamics of power converters, simulating these models with nonlinear control schemes requires small time steps to produce accurate results. To address this limitation, we propose a new model of Lyapunov-function-based single-phase grid-forming inverter using the dynamic phasor (DP) method. The DP method transforms time-domain signals into slow-varying signals, enabling the use of larger time steps in simulations, which results in shorter simulation times. In the proposed DP model, the Lyapunov energy function is constructed in the DP domain using the dominant harmonics of the inverter output voltage and output current as state variables. The high accuracy and superior computational speed of the proposed DP model are validated through comparison with results obtained from a detailed model with natural-frame-based Lyapunov-function control. Experimental test results confirm the validity and high accuracy of the proposed DP-based method of modeling Lyapunov-function-controlled single-phase grid-forming inverter.

show abstract

Using Dynamic Phasors To Model and Analyze Selective Harmonic Compensated Single-Phase Grid-Forming Inverter Connected to Nonlinear and Resistive Loads

Nwaneto

Knight

2023

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

A Tuning Method of Selective Harmonic Voltage Compensator for Distributed Generators

Cited by 3 publications

References 14 publications

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Modeling Lyapunov Control-Based Selective Harmonic Compensated Single-Phase Inverter in the Dynamic Phasor Domain

Using Dynamic Phasors To Model and Analyze Selective Harmonic Compensated Single-Phase Grid-Forming Inverter Connected to Nonlinear and Resistive Loads

Contact Info

Product

Resources

About