【摘要】 该文提出了基于同步对称分量法的无功补偿导纳计算方法。该方法以电网三相正序电压为同步参考坐标,再利用旋转对称分量法可以方便地得到电网需要补偿的导纳值。文中提出的三相电压提取方法能有效地消除电网电压的畸变干扰,以电压为同步坐标的旋转对称分量法可消除电流中谐波的影响,从而可准确地计算出电网需要补偿的导纳值。基于该方法设计的静止无功补偿装置无需硬件锁相环,能够快速、准确地补偿对称/不对称负荷的无功功率,维持电压的稳定。采用 PSCAD 软件的仿真和实验结果证明,基于同步对称分量法的补偿导纳计算方法具有较好的效果。更多还原

【Abstract】 A new type of static var compensator (SVC) based on the method of synchronous symmetrical component is presented. The positive sequence voltage getting way introduced in this paper can eliminate the interference of source voltage distortion. With positive sequence voltage synchronous coordinate, the new method uses rolling symmetrical component method to obtain compensator admittance directly. The proposed SVC is simulated with PSCAD/EMTDC and a prototype based on this method is developed. The simulation and experimentation results verify that this type of SVC can get precise compensation result under the distortion of voltage and current, and it is fit for the var compensation to impactive, unbalance and low power factor loads.更多还原