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首页> 外文期刊>IEEJ Journal of Industry Applications >Harmonic Current Compensation Using Constant DC-Capacitor Voltage-Control-Based Strategy of Three-Level Neutral-Point-Clamped Inverter-Based STATCOM with Reactive Power Control
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Harmonic Current Compensation Using Constant DC-Capacitor Voltage-Control-Based Strategy of Three-Level Neutral-Point-Clamped Inverter-Based STATCOM with Reactive Power Control

机译：基于恒定直流电容器电压控制的基于三电平中性点钳位逆变器的无功功率控制STATCOM的谐波电流补偿

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摘要

This paper proposes a constant dc-capacitor voltage-control (CDCVC)-based reactive power control strategy of a static synchronous compensator (STATCOM) with a three-level neutral-point-clamped (NPC) inverter, in which the source-side harmonic currents are also compensated. The CDCVC-based reactive power control strategy uses only a CDCVC, which is always used in the grid-connected inverters, STATCOMs etc. Calculation blocks of fundamental active, reactive, and harmonic components are not needed. Thus, the authors offer a simplified strategy for a source-side reactive power control with source-side harmonic current compensations. The instantaneous power flowing into the STATCOM with a three-level NPC inverter is discussed in detail. The instantaneous power flow shows that using the CDCVC-based strategy for the STATCOM achieves sinusoidal source currents using the controlled source-side reactive power compensating the harmonic currents on the source side. A digital computer simulation is implemented to confirm the validity and high practicability of the CDCVC-based strategy. A reduced-scale prototype experimental model is constructed and tested. The simulation and experimental results demonstrate that sinusoidal source currents are obtained with the CDCVC-based strategy controlling the reactive power on the source side.
机译：本文提出了一种基于恒流直流电容器电压控制（CDCVC）的带三电平中性点钳位（NPC）逆变器的静态同步补偿器（STATCOM）的无功功率控制策略，其中源侧谐波电流也得到补偿。基于CDCVC的无功功率控制策略仅使用CDCVC，该CDCVC始终在并网逆变器，STATCOM等中使用。不需要基本有功，无功和谐波分量的计算模块。因此，作者提供了一种具有源侧谐波电流补偿的源侧无功控制的简化策略。详细讨论了使用三电平NPC逆变器流入STATCOM的瞬时功率。瞬时功率流表明，针对STATCOM使用基于CDCVC的策略，通过受控的源侧无功功率补偿源侧的谐波电流，可实现正弦源电流。通过数字计算机仿真来确认基于CDCVC的策略的有效性和高度实用性。构造并测试了缩小规模的原型实验模型。仿真和实验结果表明，采用基于CDCVC的策略控制源侧无功功率可获得正弦源电流。

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