When a voltage source converter (VSC) connects to a parallel compensated grid, high-frequency resonance (HFR) is a subsistent issue that exists in the interconnected system. HFR will introduce a significantly high-frequency voltage component at the point of common coupling, thereby the performance of the VSC system can be deteriorated seriously. For improving the operation of the VSC system under the parallel compensated grid, this study proposes an HFR damping strategy based on a voltage feedforward control to reshape the impedance of grid connected VSC. The VSC system with the proposed control strategy can damp HFR in a wide high-frequency range without employing the frequency detection and introducing the differential elements so that the negative influence caused by the high-frequency noise can be avoided. Theoretical analysis and experimental results are given to verify the effectiveness and availability of the proposed damping control strategy.

中文翻译：

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并联补偿电网下基于电压前馈的电压源变换器高频谐振的阻尼控制

当电压源转换器（VSC）连接到并联补偿电网时，高频谐振（HFR）是互连系统中存在的主要问题。HFR将在公共耦合点引入明显的高频电压分量，因此VSC系统的性能可能会严重下降。为了改善并联补偿电网下VSC系统的运行，本研究提出了一种基于电压前馈控制的HFR阻尼策略，以重塑并网VSC的阻抗。具有所提出的控制策略的VSC系统可以在宽的高频范围内阻尼HFR，而无需采用频率检测和引入差分元件，从而可以避免由高频噪声引起的负面影响。