具有谐波抑制功能的电网电能质量最优控制方法  

Optimal Control Method for Grid Power Quality with Harmonic Suppression Function

作　　者：史帅彬 曾江[2] 康文韬 张伟 SHI Shuaibin;ZENG Jiang;KANG Wentao;ZHANG Wei(Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen 518048,China;School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;Guangzhou Branch of Beijing T&D Power Research Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]深圳供电局有限公司,深圳518048 [2]华南理工大学电力学院,广州510640 [3]天地电研(北京)科技有限公司广州分公司,广州510663

出　　处：《电源学报》2022年第1期158-164,共7页Journal of Power Supply

基　　金：南方电网公司科技项目基金资助项目(090000KK 52170097)。

摘　　要：电网运行过程中容易受谐波干扰,造成电压畸变、网损过度。为此,提出具有谐波抑制功能的电网电能质量最优控制方法,优化电网电能质量的同时有效抑制谐波干扰。采用分层控制策略,初级控制采用多目标电压无功谐波优化算法获取电压差异数据、电压不稳定性数据、网络损坏率数据、电网谐波数据优化电网电压输出,同时采用模糊PI控制器完成复合电流谐波补偿抑制;二级控制将电网输出电压和频率反馈至初级控制,电网电能输出再次达到平衡;二级控制采用谐波补偿器对电网进行谐波补偿,实现电网电能质量最优控制。实验结果表明,该方法能够有效抑制电网电流畸变率,同时提高电网输出有功功率、降低无功功率,实现电网电能质量最优控制。During the operation of power grid,it is easy to be disturbed by harmonics,resulting in voltage distortion and excessive network loss.In this paper,an optimal control method for grid power quality with a harmonic suppression function is proposed to optimize the grid power quality while effectively suppressing the harmonic interference.Under the hierarchical control strategy,the primary control uses the multi-objective voltage and reactive power harmonic optimization algorithm to obtain the voltage difference data,voltage instability data,network damage rate data,and harmonic data of power grid to optimize the voltage output from power grid.At the same time,the composite current harmonic compensation is suppressed by using a fuzzy PI controller.The secondary control feeds back the output voltage and frequency of power grid to the primary control,so that the power output is balanced again.Moreover,the secondary control uses a harmonic compensator to compensate the harmonic of power grid,thus achieving the optimal control of grid power quality.Experimental results show that this method can effectively restrain the current distortion rate of power grid,improve the output active power and reduce the reactive power,thereby achieving the optimal control of grid power quality.

关 键 词：谐波抑制 电网电能 质量 最优控制 频率 电压 

分 类 号：TM711[电气工程—电力系统及自动化]