【目的】高渗透率光伏和高功率电动汽车接入改变了电力系统原有的运行特征，使电压宽幅跳变成为常态，对配电变压器的调压速度、调压范围以及容量提出了更高的要求。传统配电变压器受限于高压侧高电压，分接头级差小、调压速度慢，不能实现宽幅调压。针对此问题，本文提出了一种基于有源逆变的新型混合式低压侧宽幅调压方法，将分接开关接在配电变压器低压侧，以实现宽幅调压。【方法】针对低压侧切换电流高、通态损耗大的问题，采用逆变电源串入电力电子换流支路，基于电压电流双环竞争策略对逆变电路的控制信号进行调控，抵消电子器件正向电压，实现机械支路零电压；同时驱动逆变电路产生负载电流，强制电流由机械支路换流到电力电子换流支路，实现机械支路零电流。机械开关真正零电压、零电流动作，解决了传统混合式开关消弧不彻底的问题。【结果】仿真结果表明，逆变电源能够为机械开关提供零电压、零电流动作条件，机械开关无弧动作。与传统混合式开关相比，本文所提新型混合式低压侧宽幅调压方法的调压时间至少缩短了4倍；并且切换过程中产生的电弧能量较小，进行30万次开关动作后，机械触头的剩余使用寿命指数为97.2%，仍具有较高的使用寿命，而传统混合式开关的寿命指数仅为37.9%。【结论】本文所提新型混合式低压侧宽幅调压方法能够实现快速宽幅低损调压。

[Objective] The integration of high-penetration photovoltaics and high-power electric vehicles has altered the operating characteristics of power systems, resulting in frequent wide-range voltage fluctuations. This imposes stricter requirements on the voltage regulation speed, range, and capacity of distribution transformers. Traditional distribution transformers, limited by the high-voltage side, exhibit small tap steps and slow voltage regulation speeds, making wide-range voltage regulation impossible. To address this issue, this study proposes a novel hybrid wide-range voltage regulation method on low-voltage side based on active inversion, which connects the tap changer to the low-voltage side of the distribution transformer to achieve wide-range voltage regulation. [Methods] To address the challenges of high switching currents and large conduction losses on the low-voltage side, an inverter power source was incorporated into the power electronic commutation branch. A voltage-current dual-loop competition strategy was employed to regulate the control signals of the inverter circuit, offsetting the forward voltage of electronic components and enabling zero voltage across the mechanical branch. Meanwhile, the inverter circuit was activated to generate load current, forcing current commutation from the mechanical branch to the power electronic commutation branch, thus achieving zero current in the mechanical branch. This ensured true zero-voltage and zero-current operation of the mechanical switch, solving the problem of incomplete arc extinction in traditional hybrid switches. [Results] The simulation results showed that the inverter power supply provided zero-voltage and zero-current conditions for the mechanical switch, enabling arc-free operation. Compared to traditional hybrid switches, the proposed novel hybrid wide-range voltage regulation method on the low-voltage side reduced the voltage regulation time by at least four times. Moreover, it generated significantly lower arc energy during switching. After 300 000 switching operations, the mechanical contacts had a remaining service life index of 97.2%, demonstrating relatively long service life, while traditional hybrid switches exhibited a service life index of only 37.9%. [Conclusion] The proposed novel hybrid wide-range voltage regulation method on the low-voltage side achieves rapid, wide-range, and low-loss voltage regulation.