基于惯性同步控制策略的三相PWM变换器可在实现直流电压控制的同时对电网频率体现出阻尼特性，在新能源发电单元中得到了关注和应用。目前针对PWM变换器惯性同步控制的研究大多聚焦于并网发电场景，缺乏对其四象限控制特性及系统控制参数设计方法的研究和分析。针对该问题，建立惯性同步PWM变换器的线性化模型，推导直流电压-相角、无功-交流电压的频域解析表达式，给出直流电压和无功功率控制环路关键参数的设计方法，通过仿真和实验验证设计方法的有效性，并对四象限控制特性及阻尼电网频率变化的能力进行分析和验证。

Based on the inertia synchronization control (ISynC) method, the three-phase PWM converter can exhibit damping characteristics on the grid frequency while achieving DC voltage control, attracting attention and application in new energy generation units. Current research on the ISynC of PWM converters mostly focuses on grid-connected power generation scenarios, lacking studies and analysis on its four-quadrant control characteristics and system control parameter design methods. To address this issue, a linearized model of the inertia synchronization PWM converter is established. Frequency domain analytical expressions for DC voltage-phase angle, and reactive power-AC voltage are derived. The design method for key parameters of DC voltage and reactive power control loops is provided. The effectiveness of the design method is verified through simulation and experimentation, the four-quadrant control characteristics and the ability to damp the grid frequency variations are analyzed in parallel.