计及谐波裕度-均衡度的分布式电源最大准入功率计算方法

doi:10.19595/j.cnki.1000-6753.tces.200007

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摘要随着智能配电网中分布式电源（DG）渗透率的不断提高,可能导致电网中节点的谐波水平超标,制约分布式电源的接入功率,因此对考虑谐波影响的分布式电源准入功率进行研究显得十分重要。该文分析了新能源接入时向电网注入谐波的不确定性,基于2m+1点估计法考虑了谐波不确定性在电网中传播的影响,进而基于各节点谐波电压分布提出全网谐波裕度-均衡度指标和计算方法。在此基础上,以全网谐波裕度-均衡度综合指标最小和分布式电源准入功率最大为目标建立DG最大准入功率接入的优化模型。为了更好地求解上述混合整型非线性优化模型,提出一种基于粒子群优化-扩展权重ε约束法（PSO-AWCM）进行多目标优化计算。该方法考虑了各个目标函数的相对重要性,能够更有效地对目标函数进行优化。进一步地,利用模糊决策理论选取Pareto解集中的最优解。基于改进IEEE 33节点系统验证了所提方法的有效性和优越性。

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关键词 ：分布式发电（DG）装置, 不确定性, 谐波裕度均衡度, 粒子群优化-扩展权重ε, 约束法（PSO-AWCM）, 多目标优化

Abstract：Distributed generator (DG) accessing to smart distribution grids, with the improvement of their permeability, may cause harmonic levels of grid node exceeding the harmonic standards GB and restrict power accessing to distributed power. Study of penetrating level considering harmonic influence is very important. To solve this problem, this paper analyzes the harmonics injecting to grid indeterminately when new energy accessing to grid and analyze the influence of harmonic spreading in grid based on 2m+1 point estimation method. The calculation methods of balance degree index of harmonic margin is proposed based on each node harmonics voltage distribution of the whole network. This paper present a method for maximizing penetration level of DG, modeling in the form of multi-objective mathematical programming to simultaneously minimize balance comprehensive degree index of harmonic margin and maximize power of DG access to grid. In order to solve this model, an augmentedε-constraint considering weight of each objective function method incorporation of particle swarm optimization (PSO-AWCM) is proposed which could optimize more effectively comparing to conventionalε-constraint method. Moreover, fuzzy decision theory is implemented to choose the most preferred compromise solution among the Pareto solutions. Using IEEE33 bus system demonstrate the effectiveness and superiority of the proposed method.

Key words： Distribution generator (DG) uncertainty balance degree of harmonic margin particle swarm optimization-ε-constraint method (PSO-AWCM) multi-objective optimization

收稿日期: 2020-01-02

PACS:

TM715

基金资助:国家自然科学基金资助项目（51177111）

通讯作者: 汤波男,1984 年生,博士,高级工程师,研究方向为配电网及综合能源系统规划、电能质量等。E-mail: tangbo@shiep.edu.cn

作者简介: 余光正男,1987 年生,博士研究生,研究方向为可再生能源并网、电能质量等。E-mail: powerygz@shiep.edu.cn

引用本文:

余光正, 林涛, 汤波, 陈汝斯, 田野. 计及谐波裕度-均衡度的分布式电源最大准入功率计算方法[J]. 电工技术学报, 2021, 36(9): 1857-1865. Yu Guangzheng, Lin Tao, Tang Bo, Chen Rusi, Tian Ye. Calculation Method of Distributed Generator Maximum Access Power Considering Balance Degree of Harmonic Margin. Transactions of China Electrotechnical Society, 2021, 36(9): 1857-1865.

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