【摘要】 分析了微电网中无互联线逆变器并联系统的原理,提出了改进的基于相位调节的新控制方法。该方法能克服传统有功功率—无功功率(PQ)下垂控制法在稳态时输出电压频率随负载变化的问题,同时又能保证相应的动态性能。基于根轨迹法,分析了所提出方法中各控制参数对系统性能的影响,以及参数的具体设计步骤。同时,针对数字控制器以及相位调节法自身的特点,提出了增加调节精度和消除过零点畸变问题的解决办法。实验验证了所提出方法的可行性和有效性。更多还原

【Abstract】 The basic principle of parallel inverters without interconnection wires in an AC distributed systems is analysed,and a novel control method for parallel inverters based on phase adjustment is presented.The proposed control technique is effective in maintaining the voltage frequency invariant in steady state,it also ensures good dynamic performance.Analysis based on the root locus and the design approach of the control parameters are presented.Considering the characteristics of the digital controller and phase adjustment method,methods to increase the regulation accuracy and eliminate zero distortion are also given.Experimental results validate the feasibility and validity of the proposed strategy.更多还原