A Real-Time Dispatch Model Considering the Uncertainty in Photovoltaic Power

doi:10.3969/j.issn.1000-7229.2019.10.001

Abstract

Abstract: When large-scale photovoltaic power generation is injected into power system, the uncertainty of its power output brings new challenges to real-time dispatch, and further puts forward higher requirements for the accuracy of photovoltaic power prediction. To solve this problem, a real-time scheduling method considering the power uncertainty of photovoltaic power generation is proposed in this paper. Firstly, on the basis of the effective steady-state security region method and linear power flow model of real-time dispatching, a real-time dispatching model considering voltage amplitude is proposed in this paper. Secondly, the original problem is transformed into a deterministic linear programming problem by robust optimization. Finally, according to the proposed method, effect of the accuracy of photovoltaic power and load forecasting on the security and economy of power system real-time dispatching is analyzed. In this paper, the effectiveness and efficiency of the method are illustrated by an example of modified IEEE 9-node system and the IEEE 118-node system.

Key words: photovoltaic generation, power prediction, voltage magnitude, real-time dispatch, security, economy

CLC Number:

TM 73

ZHOU Yu, YANG Ming,WANG Fei,WANG Shibo，ZHU Yi. A Real-Time Dispatch Model Considering the Uncertainty in Photovoltaic Power[J]. Electric Power Construction, 2019, 40(10): 1-8.

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