【摘要】 为解除在岸控并网时靠港船舶冲击负载导致逆变器过流保护跳闸故障,提出一种岸控逆变器双输出港船无缝连接供电的控制策略,使用同步逆变器模拟同步发电机的并联同步转移负载性能,采用虚拟同步机控制方法,并利用实验装置进行并网实验。并网实验表明,突加冲击负载导致畸变波形,采用电压/频率(V/f)控制在并网前后畸变波形未完全修复;采用虚拟同步机控制可以完全修复畸变波形并保证频率和电压变化幅度较为平缓,具有快速追踪的特性,应用于港船无缝接岸电方面更具有优势。更多还原

【Abstract】 In order to remove the fault caused by the impact load which can lead to over-current protection tripping of the inverter in the process of onshore power grid connection, the control strategy of inverter dual output seamless power supply was presented, using a synchronous inverter to simulate the parallel synchronous transfer load performance of a synchronous generator. The control method of virtual synchronous machine was adopted, and the experiment device was used to carry out the experiment of grid connection. The experimental results showed that the distortion waveform is not completely repaired by voltage/frequency(V/f) control before and after grid-connection; by virtual synchronous generator control strategy, the variation range of frequency and voltage is relatively gentle and has the characteristics of fast tracking. Therefore, the virtual synchronous generator control method has more advantages in the field of port ship seamless connection to shore power.更多还原