Calculation Method of Distributed Generator Maximum Access Power Considering Balance Degree of Harmonic Margin
Yu Guangzheng1, Lin Tao2, Tang Bo1, Chen Rusi3, Tian Ye3
1. School of Electrical Engineering Shanghai University of Electric Power Shanghai 200090 China; 2. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China; 3. State Grid Hubei Electric Power Research Institute Wuhan 430077 China
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.
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2021, Vol. 36 
