Abstract The improvement of the power factor in three-phase, four-wire, stationary, unbalanced and linear loads, supplied from an ideal and symmetrical source at nonsinusoidal periodic waveforms, is the subject of this article. The case of an ideal source or a source that has a negligibly low internal impedance was considered. The analysis was based on the load current decomposition, according to the Current Physical Components (CPC) theory. The paper presents fundamentals of design of reactive compensators for compensation of the reactive and unbalanced currents of linear time invariant (LTI) loads supplied with nonsinusoidal voltage in four-wire systems. A reactive balancing compensator consists of two compensators working in a star and triangle configuration. The article presents the method of calculating the parameters of such a compensator using the CPC power theory. It was proved that the reactive and unbalanced components of current can be fully compensated in the reactive compensator also in the case of nonsinusoidal waveforms in power networks.

中文翻译：

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三相四线系统中非正弦周期波形的两级无功补偿

摘要 本文的主题是提高三相、四线、固定、不平衡和线性负载的功率因数，这些负载由理想的对称电源以非正弦周期波形供电。考虑了理想源或内部阻抗可忽略不计的源的情况。根据电流物理组件 (CPC) 理论，分析基于负载电流分解。本文介绍了无功补偿器设计的基本原理，用于补偿在四线制系统中提供非正弦电压的线性时不变 (LTI) 负载的无功电流和不平衡电流。无功平衡补偿器由两个以星形和三角形配置工作的补偿器组成。本文介绍了使用 CPC 幂理论计算这种补偿器参数的方法。事实证明，在电网中出现非正弦波形的情况下，无功补偿器中的电流的无功和不平衡分量也可以得到充分补偿。