These new oscillations arise from control interactions between inverter-based resources and the system. For instance, inverters bring their own control systems, and when they interact with the grid, it can result in these sub-synchronous and super-synchronous oscillations.
At present, the main methods to eliminate the output power oscillation of grid-connected inverter under unbalanced grid voltage can be divided into two categories: the first type is to improve the control strategy; the second one is to change the topology of the inverter.
Abstract: Out-of-step (OOS) oscillation is a key link in the power system outage evolution. Precise islanding control can prevent system outages. Renewable energy is connected to the power grid through transverter. From a system construction perspective, it can be regarded as grid-following sources.
Author to whom correspondence should be addressed. Under unbalanced grid voltage faults, the output power oscillation of a grid-connected inverter is an urgent problem to be solved. In the traditional topology of inverters, it is impossible to eliminate power oscillation and simultaneously maintain balanced output current waveform.
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Out-of-step (OOS) oscillation is a physical phenomenon in which the electric energy transmitted in the electric power network fluctuates drastically, which is caused by the …
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The frequency, voltage, and even the waveform can vary, introducing these unique oscillation patterns. Factors influencing these oscillations include the number and types of …
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Under unbalanced grid voltage faults, the output power oscillation of a grid-connected inverter is an urgent problem to be solved. In the traditional topology of inverters, it …
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Out-of-step (OOS) oscillation is a key link in the power system outage evolution. Precise islanding control can prevent system outages. Renewable energy is connected to the …
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The current challenge for grid operators is maintaining the stability of the network in the presence of low-frequency oscillations and preventing the OOS condition. Concerning …
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The out-of-step characteristics and out-of-step protection of grid-connected converter are urgent research topics at present. In this paper, the out-of-step mechanism of …
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The latter, if not treated, can cause severe oscillations that divide the network into smaller groups which oscillate against each other, leading to out-of-step (OOS) condition in …
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To summarize, this article performs an OOS analysis of power oscillation in grid-connected generator and interconnected power systems. An out-of-step tripping algorithm has been …
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Aiming at the lack of research on the migration mechanism of the out-of-step oscillation centre of the power system under the scenario of high proportion of new energy grid …
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