UPQC补偿量综合检测方案设计
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摘要
对UPQC补偿量检测方法进行了分析,提出在电网电压不对称且畸变的状态下实现UPQC补偿量综合检测的方法,该方法不存在锁相环和大量的坐标变换,通过正弦幅值积分器直接从不对称且畸变的电压中提取出基波正序电压,可直接用于电压补偿量的计算,同时为基于FBD法的谐波电流检测电路提供正弦参考信号,可快速准确地实现补偿量的检测。通过simiulink进行仿真,实现了电网电压谐波畸变且不对称状态下电压和电流补偿量的检测。
The unified power quality conditioner offsets detection method was analyzed,and a way to realize the offsets detection under the condition of asymmetry and grid voltage distortion was proposed. This method does not exist phase-lock link and a large number of coordinate transformation,fundamental positive sequence voltage can be extracted directly from distortion and asymmetrical voltage,and can be used in calculation of voltage compensation. It also provides sinusoidal reference signal for the harmonic current detection based on FBD,and the detection of compensation amount is realized rapidly and accurately. The simulation results confirm the validity of the method.
The unified power quality conditioner offsets detection method was analyzed,and a way to realize the offsets detection under the condition of asymmetry and grid voltage distortion was proposed. This method does not exist phase-lock link and a large number of coordinate transformation,fundamental positive sequence voltage can be extracted directly from distortion and asymmetrical voltage,and can be used in calculation of voltage compensation. It also provides sinusoidal reference signal for the harmonic current detection based on FBD,and the detection of compensation amount is realized rapidly and accurately. The simulation results confirm the validity of the method.
引文
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[11]史丽萍,刘鹏,徐天然,等.一种改进无锁相环FBD谐波和无功电流检测方法[J].电测与仪表:2014,51(16):56-61.
[2]姜齐荣,赵东元.有源电力滤波器——结构、同步信号的检测[J].仪器仪表学报:2010,31(1):78-84.
[3]刘勇平,张井冈,赵志诚,等.基于Lab VIEW的电能质量监测实验平台设计[J].太原科技大学学报:2016,37(2):92-97.
[4]田桂珍,王生铁,林百娟,等.电压不平衡时风电系统中基于双同步变换的锁相环设计[J].电气传动:2010,40(7):53-57.
[5]程启明,胡晓青,吴凯,等.统一电能质量调节器的谐波检测与补偿策略研究[J].电测与仪表:2012,49(3):19-23.
[6]徐海亮,章玮,胡家兵,等.电网电压不平衡及谐波畸变时基波电压同步信号的检测[J].电力系统自动化:2012,36(5):90-95.
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[8]康静,郑建勇,曾伟,等.FBD法在三相四线制系统电流实时检测中应用[J].电力自动化设备:2006,26(8):36-39.
[9]刘开培,陈艳慧,张俊敏.基于p-q-r法的电力系统谐波检测方法[J].中国电机工程学报:2005,25(14):25-29.
[10]马立新,王月晓,王晓丹,等.无低通滤波器FBD电流检测方法实现[J].电力电子技术:2012,46(7):58-60.
[11]史丽萍,刘鹏,徐天然,等.一种改进无锁相环FBD谐波和无功电流检测方法[J].电测与仪表:2014,51(16):56-61.