Can a PWM inverter suppress high-frequency oscillation?On the basis of traditional dual-loop control, an impedance reconstruction control of the source PWM inverter is proposed, which can effectively suppress the high-frequency oscillation of the island power system. The following conclusions can be drawn from this paper:.
Do grid-connected inverters cause high-frequency oscillations?Grid-connected inverters are crucial interfaces in renewable energy power systems. However, with the continuous increase in the penetration of renewable energy generation, the dynamic interaction between these inverters and the grid becomes increasingly complex, leading to prominent high-frequency oscillation issues.
Do filter and delay characteristics cause high-frequency oscillations in grid-connected systems?This paper addresses the high-frequency oscillations in grid-connected systems caused by filter and delay characteristics, by proposing an enhanced grid-connected current feedback active damping control strategy with phase compensation to effectively mitigate these oscillations.
How to mitigate high-frequency oscillation?Among the diverse strategies to mitigate high-frequency oscillation, optimizing control parameters and improving controller structures are two main approaches.
What happens after adding impedance reconstruction control in a PWM inverter?After adding impedance reconstruction control, the output voltages and currents of the source PWM inverter loaded with pure resistive load remain stable under different output power; when the load is a PWM rectifier, the high-frequency oscillation of the island power system is effectively suppressed.
Are subsynchronous oscillations associated with inverter-based resources influenced by power grid characteristics?Abstract: This paper presents a survey of real-world subsynchronous oscillation events associated with inverter-based resources (IBR) over the past decade. The focus is on those oscillations in the subsynchronous frequency range known to be influenced by power grid characteristics, e.g., series compensation or low system streng
Nov 15, 2023 · Sub-synchronous oscillations are becoming commonplace in weak areas of power systems with high levels of renewable generation, affecting their operati
Oct 24, 2021 · High Voltage Direct Current Transmission based on modular multilevel converter (MMC-HVDC) may have a wide frequency range of oscillation risks. In order to reproduce the
Aug 1, 2024 · Recent years, there have been several high-frequency oscillation events in modular multilevel converter (MMC) based DC current projects. Considering the wideband oscillation
Jan 1, 2023 · Since the LCL filter has good performance to attenuate high frequency harmonics, it is widely used in wind power inverters. But it can cause high-frequency oscillations and
Apr 20, 2025 · By establishing an impedance model of grid-connected inverters, it reveals that the capacitive phase-frequency characteristics within the 50-150Hz frequency band interact with
Nov 11, 2024 · High frequency electric fields within the healthy insulation cause also increased hysteretic polarisation losses ("dielectric losses"), but the loss density (W/m3) is much too
Aug 1, 2025 · To suppress the high-frequency oscillations (HFOs) in Modular Multilevel Converter based High Voltage Direct Current (MMC-HVDC) transmission system, this article proposes a
Mar 23, 2022 · This paper presents a survey of real-world subsynchronous oscillation events associated with inverter-based resources (IBR) over the
Oct 21, 2024 · The high penetration of renewable energy sources (RESs) and power electronics devices has led to a continuous decline in power system
Apr 15, 2025 · NERC Recommended Practices & Mitigation Measures Three-phase, five-step approach to mitigate forced oscillations Source location and source type estimation are critical
Apr 18, 2025 · This paper addresses the high-frequency oscillations in grid-connected systems caused by filter and delay characteristics, by proposing an enhanced grid-connected current
The inverter''s output impedance characteristics are influenced by complex control dynamics, and the interaction between source and load impedances presents a risk of high-frequency
2 days ago · During the CIGRE Grid of the Future symposium and workshop, harmonics were recognized as a critical focus in modern electrical systems,
Download Citation | On Aug 1, 2025, Liu Chenruiyang and others published Analysis of high-frequency oscillation mechanism of inverter with motor load based on series resonance | Find,
Dec 21, 2023 · This paper presents an intelligent stability prediction method for high-frequency oscillation of grid-connected inverter considering time-varying parameters of power grid and
Nov 15, 2021 · Time delay effect is the main factor that causes high frequency oscillation between HVDC transmission system and weak grid. In this paper, a modular multilevel converter
May 17, 2019 · As parallel inverters connected to the weak grid, the interactions between the inverters and the grid are the potential threat to the system stability. The traditional grid-side
Aug 8, 2021 · High-frequency common-mode voltage generated by inverters causes severe negative effects, particularly in silicon carbide (SiC) Metal
Mar 27, 2025 · With the development of the new power system with a high proportion of new energy and a high proportion of power electronic equipment,
With the development of the new power system with a high proportion of new energy and a high proportion of power electronic equipment, various problems caused by high-frequency
Jul 2, 2024 · High-frequency oscillation (HFO) of grid-connected wind power generation systems (WPGS) is one of the most critical issues in recent years that threaten the safe access of
Jul 5, 2023 · Analysis and Optimization of High-Frequency Switching Oscillation Conducted CM Current Considering Parasitic Parameters Based on a Half-Bridge Power Module | IEEE
Feb 25, 2025 · Firstly, it describes the phenomenon and mechanism of wide time-scale oscillations in grid-connected inverters, and introduces the concept of
Aug 23, 2022 · HIGH frequency oscillation (HFO) events have been re-ported in recent years around the world [1]–[4]. In south China, HFOs at 1272 Hz have been observed in a modular
Download scientific diagram | Qualitative analysis of high-frequency oscillation reason in multi-inverter grid-connected system. from publication: Stability
Feb 1, 2024 · The effectiveness of the sensor in improving the signal-to-noise- ratio (SNR) is verified by magnetic field simulations and online insulation monitoring experiments. 1 High
Jul 17, 2023 · As the penetration of renewable energy increases year by year, the risk of high-frequency oscillation instability increases when a three-phase, four
Apr 20, 2025 · Focusing on the 125Hz medium-high frequency oscillation issues observed in renewable energy power stations, this study investigates the influence of phase-locked loop
Jan 9, 2025 · This paper proposes a real-world oscillation event analysis framework for power systems that include inverter-based resources together
May 1, 2020 · An impedance reconstruction control of source PWM inverters is proposed to improve the phase of output sequence impedance of the source PWM inverter at high
On the basis of traditional dual-loop control, an impedance reconstruction control of the source PWM inverter is proposed, which can effectively suppress the high-frequency oscillation of the island power system. The following conclusions can be drawn from this paper:
Grid-connected inverters are crucial interfaces in renewable energy power systems. However, with the continuous increase in the penetration of renewable energy generation, the dynamic interaction between these inverters and the grid becomes increasingly complex, leading to prominent high-frequency oscillation issues.
This paper addresses the high-frequency oscillations in grid-connected systems caused by filter and delay characteristics, by proposing an enhanced grid-connected current feedback active damping control strategy with phase compensation to effectively mitigate these oscillations.
Among the diverse strategies to mitigate high-frequency oscillation, optimizing control parameters and improving controller structures are two main approaches.
After adding impedance reconstruction control, the output voltages and currents of the source PWM inverter loaded with pure resistive load remain stable under different output power; when the load is a PWM rectifier, the high-frequency oscillation of the island power system is effectively suppressed.
Abstract: This paper presents a survey of real-world subsynchronous oscillation events associated with inverter-based resources (IBR) over the past decade. The focus is on those oscillations in the subsynchronous frequency range known to be influenced by power grid characteristics, e.g., series compensation or low system strength.
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