CAJ | 학술논문

虽然以d-q坐标系下矢量控制为代表的线性控制可以消除系统稳态误差问题，但是系统存在功率耦合问题，使系统难以在功率单位因数下稳定运行。文章在传统电流PI控制的基础上，提出一种基于静止α-β坐标系下的PR控制，并对该控制策略进行改进，减少了一些复杂的坐标变换。在动态对比仿真中表明，采用改进PR控制的并网逆变器具有较好的动态响应性能，能实现电流无稳态误差跟踪电流参考值，在入网电流发生突变后能快速跟踪电网电压，并实现了有功无功的解耦控制。经过谐波含量分析，改进的PR控制策略也具有一定谐波抑制能力。
수연이d-q좌표계하시량공제위대표적선성공제가이소제계통은태오차문제，단시계통존재공솔우합문제，사계통난이재공솔단위인수하은정운행。문장재전통전류PI공제적기출상，제출일충기우정지α-β좌표계하적PR공제，병대해공제책략진행개진，감소료일사복잡적좌표변환。재동태대비방진중표명，채용개진PR공제적병망역변기구유교호적동태향응성능，능실현전류무은태오차근종전류삼고치，재입망전류발생돌변후능쾌속근종전망전압，병실현료유공무공적해우공제。경과해파함량분석，개진적PR공제책략야구유일정해파억제능력。
Although the linear control represented by d-q coordinates vector control can eliminate the system steady-state error, there are power coupling problems in the system,which makes the system be difficult to realize stable oper-ation with a unit power factor.A static alpha beta coordinates system based PR control strategy is proposed in this pa-per based on the traditional current PI control.The PR control has been improved which will reduce complex coordi-nate transformation.Dynamic contrast simulation show that the improved PR control grid inverter apparatus has good dynamic response performance and can realize no steady-state error tracking current reference value.Moreover, it will quickly track the power grid voltage after the net current mutation so as to realize the decoupling control of active and reactive power.Analysis on harmonic content show that the improved PR control strategy has certain harmonic suppression.