主动配网中多换流器式统一电能质量控制器的应用研究

发布时间：2018-04-18 05:32

本文选题：主动配电网 + 电能质量　；参考：《华北电力大学》2014年硕士论文

【摘要】：大量分布式电源接入配电网,令传统配电网具备了有源化和主动化的特征。在主动配电网充分发挥多种清洁能源优势的同时,也不得不面对电能质量问题日益突出的困境。不断增加的电力电子装置等非线性负荷,也给主动配电网的电能质量带来了一定的负面影响,使得电能质量分析和控制问题受到越来越广泛的关注。本文针对主动配电网中电能质量问题的特点,提出了在主动配电网中采用多换流器式统一电能质量控制器进行电能质量调控的研究思路。分析了多换流器式统一电能质量控制器的基本原理,设计了适用于主动配电网电能质量控制的多换流器式统一电能质量控制器调控策略。分析了主动配电网的网络结构特点及其能量流控制结构；针对大量分布式电源的接入,从不同角度分析了其对主动配电网电能质量造成的不利影响,进而讨论了该影响的传播与放大问题,总结了主动配电网中电能质量问题,为采用多换流器式统一电能质量控制器进行电能质量调控奠定了应用背景。针对多换流器式统一电能质量控制器的功能结构,分析了现有典型的信号检测方法,重点分析了基于广义瞬时功率理论的电压检测方法和基于瞬时无功功率理论的电流检测方法。据此提出了多换流器式统一电能质量控制器中的串联有源滤波器采用微分负反馈电压滞环控制、并联有源滤波器采用电流滞环控制的整体控制策略,理论分析表明该方案适用于配电网中电能质量的控制与治理。根据多换流器式统一电能质量控制器的主电路拓扑结构,设计了主要参数。对其中的串联有源滤波器的电压滞环控制策略与微分负反馈电压滞环控制进行了模拟仿真比对,并对以两条供电线路为模型的多换流器式统一电能质量控制器及其含有光伏发电的主动式配网进行了仿真研究。结果表明了串、并联有源滤波器控制策略有效,同时也证明了多换流器式统一电能质量控制器的可行性。
[Abstract]:A large number of distributed power supplies are connected to the distribution network , so that the traditional power distribution network has the characteristics of being active and active . At the same time , the active power distribution network can fully play a variety of clean energy advantages , and also has to face the increasingly prominent plight of the electric energy quality problem .

The network structure characteristics and energy flow control structure of active power distribution network are analyzed .
Aiming at the large amount of distributed power supply , this paper analyzes its adverse effect on the quality of active power distribution network from different angles , then discusses the propagation and amplification of the influence , summarizes the problem of power quality in the active power distribution network , and establishes the application background for the energy quality control of the unified power quality controller with multi - converter .

Aiming at the function structure of a multi - converter unified power quality controller , the current typical signal detection method is analyzed , the voltage detection method based on the generalized instantaneous power theory and the current detection method based on the instantaneous reactive power theory are emphatically analyzed . According to the method , a differential negative feedback voltage hysteresis control is adopted for the series active filter in the multi - converter type unified power quality controller , and a current hysteresis control integrated control strategy is adopted in the parallel active filter , and the theoretical analysis indicates that the scheme is suitable for the control and treatment of the electric energy quality in the distribution network .

The main parameters are designed according to the main circuit topological structure of the multi - converter unified power quality controller . The voltage hysteresis control strategy of the series active filter and the differential negative feedback voltage hysteresis control are simulated . The results show that the parallel active filter control strategy is effective and the feasibility of the multi - converter unified power quality controller is also proved .

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM711

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