Research on Frequency Detection Optimization Method Based on Double Input Improved Second Order Generalized Integrator

doi:10.3969/j.issn.1008-0198.2023.03.003

Abstract

Abstract: Aiming at the problem that the voltage of the distributed power grid-connected point under complex power grid is prone to disturbance, imbalance and other non-ideal working conditions, which adversely affects the accurate observation of frequency information, the working principle of the improved second-order generalized integrator is used to propose a frequency observer constructed based on the double-input improved second-order generalized integration principle, so that the system can realize accurate observation of frequency information under complex working conditions such as frequency disturbance and voltage three-phase amplitude imbalance. The simulation results show that the proposed method has a smaller overshoot of frequency observation under frequency disturbance and amplitude imbalance, and there is no oscillation of the observed value, which verifies its effectiveness and accuracy in the dynamic performance of frequency observation.

Key words: distributed power supply, frequency observation, second order generalized integral, imbalance

CLC Number:

TM46

HUANG Taiyu, HAN Wei, MA Weidong, LIU Chao, DANG Yiqi. Research on Frequency Detection Optimization Method Based on Double Input Improved Second Order Generalized Integrator[J]. Hunan Electric Power, 2023, 43(3): 16-20.

References

[1]张运洲, 鲁刚, 王芃,等. 能源安全新战略下能源清洁化率和终端电气化率提升路径分析[J]. 中国电力, 2020, 53(2):1-8.
[2]施佳斌,季亮,常潇,等. 不对称电压跌落下考虑场景区分的逆变型分布式电源控制策略研究[J]. 电力系统保护与控制, 2020, 48(20):9-17.
[3]陶维青, 顾芝瑕, 丁明,等. 不平衡情况下逆变型分布式电源并网控制策略研究[J]. 电气工程学报, 2016, 11(7):32-38.
[4]廖勇,庄凯,姚骏.电网电压不平衡时全功率风电并网变流器的控制策略[J].电网技术,2012,36(1):72-78.
[5]赵希才, 徐光福. 频率保护与分布式发电[J]. 供用电, 2017, 34(2):28-31.
[6]杨珮鑫, 张沛超. 分布式电源并网保护研究综述[J]. 电网技术, 2016, 40(6):1888-1895.
[7] 王海云,许方晨.新型分布式发电系统孤岛检测技术[J].电气应用,2013,32(S2):435-438.
[8]胡彬,吴超,年珩,等.薄弱电网下新能源设备并网锁相同步方式综述[J].电力自动化设备,2020,40(9):26-34,41.
[9]李建文,齐飞,李永刚.复杂电网工况下三相并网逆变器的锁频环技术[J].电测与仪表,2016,53(16):85-89.
[10]刘新天,冯嘉骏,何耀,等.基于闭环锁频控制的并网逆变器孤岛检测方法[J].电力系统自动化,2017,41(22):116-123.
[11]吴晓波,金泰木,陈雯,等.基于SOGI-FLL锁相的PWM整流器控制研究[J].电力电子技术,2022,56(2):119-121.
[12]余永奎, 李华, 刘俊峰. 基于固定频率二阶广义积分器的单相锁频环[J]. 电力系统及其自动化学报, 2020,32(9):86-93.
[13]巩冰, 王科俊, 马晓伟. DSOGI-PLL算法在不平衡和畸变电网电压监测中的应用[J]. 传感器与微系统, 2015, 34(1):154-156,160.
[14]李卫国,刘宏伟,刘新宇,等.基于改进SOGI-PLL的电压同步信号检测技术[J].东北电力大学学报,2021,41(3):93-100.
[15]Remus Teodorescu, Marco Liserre, Pedro Rodríguez. 光伏与风力发电系统并网变换器[M]. 周克亮,王政,徐青山,译.北京:机械工业出版社, 2012.
[16]李德文. 基于SOGI的谐波条件下同步信号提取方法研究[D].东营:中国石油大学(华东),2018.
[17]胡挜喆,刘文泽.抑制直流偏移的改进型二阶广义积分器的锁频环设计[J].电测与仪表,2020,57(9):52-57.
[18]邓哲, 周峰武, 林辉品,等. 电网故障时基于双输入SOGI-FLL的新型电网快速同步方法[J]. 电工技术学报, 2013, 28(12):32-43.
[19]王国宁,孙鹏菊,杜雄,等.电网电压不对称时锁频环同步信号检测方法的动态性能[J].电工技术学报,2015,30(22):163-171.