Abstract：The instantaneous power mathematical model of three-phase voltage-source inverter was established based on instantaneous power theory. Considering the instantaneous power for power rate of cross-coupling effect, the equilibrium vector was derived and the subspace of power variation was established. Then the effect of voltage space vector on instantaneous power in the subspace was studied, compared with the traditional switching tables. A new direct power control strategy based on subspace of power variation was proposed, which built a dynamic switching table by setting active and reactive power priority reference. The proposed strategy can select the voltage space vector more accurately, broaden the power adjustment range of inverter, and reduce the power ripple. The proposed control strategy was verified by the simulation and experiment.
周小杰, 张霞, 汪飞. 基于功率变化子空间的直接功率控制[J]. 电工技术学报, 2015, 30(24): 142-151.
Zhou Xiaojie, Zhang Xia, Wang Fei. Direct Power Control Based on Subspace of Power Variation. Transactions of China Electrotechnical Society, 2015, 30(24): 142-151.
[1] 赵方平, 杨勇, 阮毅, 等. 三相并网逆变器直接功率控制和直接功率预测控制的对比[J]. 电工技术学报, 2012, 27(7): 212-220. Zhao Fangping, Yang Yong, Ruan Yi, et al. Com- parative study for direct power control and direct power predictive control in three-phase grid-connected inverters[J]. Transactions of China Electrotechnical Society, 2012, 27(7): 212-220. [2] 杨勇, 赵方平, 阮毅, 等. 三相并网逆变器模型电流预测控制技术[J]. 电工技术学报, 2011, 26(6): 153-159. Yang Yong, Zhao Fangping, Ruan Yi, et al. Model current predictive control for three-phase grid-connected inverters[J]. Transactions of China Electrotechnical Society, 2011, 26(6): 153-159. [3] 赵梅花, 阮毅, 杨勇, 等. 直驱式混合励磁风力发电系统控制策略的研究[J]. 电力系统保护与控制, 2010, 38(12): 19-23. Zhao Meihua, Ruan Yi, Yang Yong, et al. Control strategy study on direct-driven type hybrid excitation wind power system[J]. Power System Protection and Control, 2010, 38(12): 19-23. [4] 曾正, 赵荣祥, 杨欢, 等. 多功能并网逆变器及其在微电网电能质量定制中的应用[J]. 电网技术, 2012, 36(5): 58-67. Zeng Zheng, Zhao Rongxiang, Yang Huan, et al. A multi-functional grid-connected inverter and its application to customized power quality of microgrid [J]. Power System Technology, 2012, 36(5): 58-67. [5] 章玮, 王宏胜, 任远, 等. 不对称电网电压条件下三相并网型逆变器的控制[J]. 电工技术学报, 2010, 25(12): 103-110. Zhang Wei, Wang Hongsheng, Ren Yuan, et al. Inves- tigation on control of three-phase grid-connected inverters under unbalanced grid voltage conditions[J]. Transactions of China Electrotechnical Society, 2010, 25(12): 103-110. [6] Zhi D, Xu L, Williams B W. Improved direct power control of grid-connected DC/AC converters[J]. IEEE Transactions on Power Electronics, 2009, 24(5): 1280- 1292. [7] Restrepo J A, Aller J M, Viola J C, et al. Optimum space vector computation technique for direct power control[J]. IEEE Transactions on Power Electronics, 2009, 24(6): 1637-1645. [8] 李子欣, 李耀华, 王平, 等. PWM 整流器在静止坐标系下的准直接功率控制[J]. 中国电机工程学报, 2010, 30(9): 47-54. Li Zixin, Li Yaohua, Wang Ping, et al. Novel quasi direct power control method for PWM rectifier in stationary frame[J]. Proceedings of the CSEE, 2010, 30(9): 47-54. [9] 杨兴武, 赵剑飞, 杨兴华, 等. 基于变换器输出电压快速计算的直接功率控制方法[J]. 中国电机工程学报, 2010, 30(36): 59-64. Yang Xingwu, Zhao Jianfei, Yang Xinghua, et al. Direct power control based on output voltage com- putation technique for AC/DC converters[J]. Procee- dings of the CSEE, 2010, 30(36): 59-64. [10] Noguchi T, Tomiki H, Kondo S, et al. Direct power control of PWM converter without power-source voltage sensors[J]. IEEE Transactions on Industry Applica- tions, 1998, 34(3): 473-479. [11] 王久和, 李华德. 一种新的电压型 PWM 整流器直接功率控制策略[J]. 中国电机工程学报, 2005, 25(16): 47-52. Wang Jiuhe, Li Huade. A novel control strategy for photovoltaic grid-connected inverter[J]. Proceedings of the CSEE, 2005, 25(16): 47-52. [12] 郭文勇, 赵彩宏, 张志丰, 等. 电压型超导储能系统的统一直接功率控制方法[J]. 电网技术, 2007, 31(9): 58-63. Guo Wenyong, Zhao Caihong, Zhang Zhifeng, et al. A unified direct power control method for voltage type superconducting magnetic energy storage system[J]. Power System Technology, 2007, 31(9): 58-63. [13] Hu Jiabing, Zhu Z Q. Investigation on switching patterns of direct power control strategies for grid- connected DC-AC converters based on power variation rates[J]. IEEE Transactions on Power Electronics, 2011, 26(12): 3582-3598. [14] 陈伟, 邹旭东, 唐健, 等. 三相电压型 PWM 整流器直接功率控制调制机制[J]. 中国电机工程学报, 2010, 30(3): 35-41. Chen Wei, Zou Xudong, Tang Jian, et al. DPC modula- tion mechanism of three-phase voltage source PWM rectifiers[J]. Proceedings of the CSEE, 2010, 30(3): 35-41. [15] Superti-Furga G, Todeschini G. Discussion on instan- taneous p-q strategies for control of active filters[J]. IEEE Transactions on Power Electronics, 2008, 23(4): 1945-1955.
2015, Vol. 30 
