CAJ | 학술논문

模拟同步发电机特性的并网逆变器由于引入旋转电机的机电模型，具备了惯性特征，可提升电网对分布式电源的接纳能力。实践证明，同步发电机作为电网的主要发电源有利于提升电网的稳定性，可以解决当前阻碍分布式能源大规模并网的技术难题。介绍同步发电机的模型及同步逆变器的工作原理，对其主电路以及控制参数进行设计，重点对其三相四线制中线模块设计进行阐述。同时搭建10 kW的原理样机，验证理论的可行性。
모의동보발전궤특성적병망역변기유우인입선전전궤적궤전모형，구비료관성특정，가제승전망대분포식전원적접납능력。실천증명，동보발전궤작위전망적주요발전원유리우제승전망적은정성，가이해결당전조애분포식능원대규모병망적기술난제。개소동보발전궤적모형급동보역변기적공작원리，대기주전로이급공제삼수진행설계，중점대기삼상사선제중선모괴설계진행천술。동시탑건10 kW적원리양궤，험증이론적가행성。
Because of the introduction of the electromechanical model ofrotating electrical machine, the grid-connected inverter which mimics synchronous generator characteristic has inertia characteristic, which improves the capacity of power grid to accept distributed generation. It is proven by reality that synchronous generators as major power generation sources in the power system are beneficial to the stability of the power grid, and then synchronverter could solve the current technical problems that hinder large-scale distributed energy resource from connecting the grid. The model of synchronous generator and the working principle of synchronverter are introduced. And the main circuit and the controls parameters of synchronverter are designed. It focuses on the neutral line module design in the three-phase four-wire system of the synchronverter. A 10 kW principle prototype is built and the experimental results verify the validity of the theory.