考虑出力不确定性的分布式电源谐波传播计算  

A Calculation Method of Harmonic Propagation Considering the Uncertainty of Distributed Generation

作　　者：邵振国[1] 黄伟达 Shao Zhenguo;Huang Weida(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350116,China;State Grid Quanzhou Electric Power Supply Company,Quanzhou 362000,China)

机构地区：[1]福州大学电气工程与自动化学院,福州350116 [2]国网泉州供电公司,泉州362000

出　　处：《电工技术学报》2019年第S02期674-683,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51777035)

摘　　要：新能源分布式发电(DG)具有随机性和间歇性的特征,并网后将向电网注入不确定性的谐波电流。考虑DG出力、谐波含有率的不确定性及两者的相关性,建立DG注入谐波的复仿射模型,提出采用Ybus高斯迭代的复仿射谐波潮流算法,首先计算DG基波电流,此后计算谐波电流和谐波电压并更新节点基波功率直至收敛。以IEEE 33节点系统为例,与基于蒙特卡罗和区间算术的谐波潮流算法对比,证明该文方法在保守性方面优于区间算术法,能够兼顾解的完备性和准确性,且在算法效率上高于蒙特卡罗法。此外还分析了DG谐波的幅值和相位不确定性对电网谐波分布的影响。A novel method of harmonic propagation considering the uncertainty of renewable energy generation is proposed in this paper.It first establishes the affine-based harmonic model of DGs considering the uncertainty of output and the relation to the harmonic.Then it solves the fundamental power flow by Ybus-Gauss iteration and computes the harmonic currents and voltage iteratively until convergence.Its effectiveness and correctness are verified by compared with Monte Carlo and interval arithmetic harmonic power flow algorithm in IEEE 33-bus system.In addition,the amplitude uncertainty and phase uncertainty of the DG affecting the total harmonic distortion of bus voltage are analyzed.

关 键 词：新能源发电 谐波 出力不确定性 复仿射 区间谐波潮流 

分 类 号：TM711[电气工程—电力系统及自动化]