基于快速有效值算法的逆变器三环控制策略

传统的逆变器电压外环、电流内环控制策略无法完全消除静差;在双环控制基础上增加有效值外环的三环控制策略虽然能减少静差,但由于有效值算法较慢,影响了系统的动态性能。为进一步优化逆变器三环控制策略,提出了将快速有效值算法用于逆变器三环控制,并给出了2种快速有效值算法的实现原理和设计方法,通过比较得出了基于迭代法的有效值算法具有低噪声干扰、低谐波干扰等优点。将该算法用于逆变器三闭环控制系统,提高了闭环控制的实时性。通过仿真和实验验证了该方法的高稳定性和优良的动态性能。

Triple-loop inverter control strategy based on fast RMS algorithm

A high-performance t riple-loo p inverter cont ro l str ategy based o n the fast iterative virtual v aluealgo rithm w as proposed. An o uter virtual value loop w as added because the t radit io nal dual-lo op contr olst rategy co uld not eliminate the steady-state error . However, the ordinary RMS algorithms w ere not fastenough to meet the needs of the dy namic characterist ics of the inver ter. Then tw o fast RMS algo rithmsw er e int roduced to solv e this pr oblem. By comparing the advantages of these algo rithms, an alg orithmbased on iterat ion w as adopted. The results of the simulat ion and the ex periments pr ove that the t ripleloopcont rol st rateg y w ith this algor ithm incr eases the reliability and the immediacy of the system, and reducesthe steady-state error effect ively