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Capacitor voltage feedback (CVF) based active damping (AD) can suppress this resonance, and has the advantage of simple implementation. However, the amplitude of the filter capacitor voltage is much larger than the amplitude of the direct current, which leads to an inability to obtain the optimal damping ratio when CVF-AD is employed.
In this paper, a strategy to enhance the dynamic characteristics of current source inverters by constructing a capacitor current loop was proposed. The main conclusions are as follows. 1.
Nonetheless, the filter capacitor voltage amplitude is large relative to the DC-side current amplitude, and the direct feedback of the filter capacitor voltage to realize CVF-AD is prone to lead to system saturation, which affects the dynamic characteristics and stability of the system .
Then the capacitor current loop (CCL) is constructed. On this basis, the CCL and the damping branch are based on the optimal virtual resistor, which can filter out the fundamental component of the feedback filter capacitor voltage to approximately realize the function of a high-pass filter.
The main conclusions are as follows. 1. Constructing the capacitor current loop and cooperating with the damping branch can realize the function of a high-pass filter, which can eliminate the influence of the damping branch on the stability of the system. 2. The proposed strategy allows the system to achieve the optimal damping ratio.
An enhanced control for MMC-HVDC systems based on the feedback regulation loop and low-pass filter loop are proposed to maximize stability enhancement performance during disturbances. The improved dynamic response under the proposed control are also explored through theoretical analysis and simulation cases in the PSCAD/EMTDC platform.
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Online Services Email Contact14 shows the performance of regulated DC-link capacitor voltage in dynamic operation. Further measurement of overshoot or undershoot, and response time for all these …
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Online Services Email ContactA few observations, using steady state analysis. Just before the step in v in from 0V to 10V at t= 0, v out(0 ) = 0V. Since v out is across a capacitor, v out just after the step must be the same: v ...
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Online Services Email ContactIt is shown that the sum capacitor voltage in each arm often can be considered instead of the individual capacitor voltages, thereby significantly reducing the complexity of the …
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Online Services Email ContactCapacitor voltage feedback (CVF) based active damping (AD) can suppress this resonance, and has the advantage of simple implementation. However, the amplitude of the …
Online Services Email ContactCapacitor voltage feedback (CVF) based active damping (AD) can suppress this resonance, and has the advantage of simple implementation. However, the amplitude of the lter capacitor …
Online Services Email ContactIn this paper, MEMS variable capacitor with high performance was fabricated by using simple MEMS technology, compatible with IC process and a reduced-order model is …
Online Services Email ContactR. Ferrero, P.A. Pegoraro, S. Toscani, Impact of Capacitor Voltage Transformers on Phasor Measurement Units Dynamic Performance, in: 2018 IEEE 9th International …
Online Services Email ContactAbstract: This paper presents a new strategy for the analytical determination of the natural voltage balancing dynamics of three-phase flying capacitor converters. The …
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