Multi-Time Scale Flexible Indices of Power System

doi:10.3969/j.issn.1000-7229.2016.02.008

Abstract

Abstract:

To solve the problem of intermittent power connected to grid, this paper proposes the flexibility evaluation model of multi-time scale power system with considering wind power uncertainty and load fluctuation. This paper firstly introduces the wind power uncertainty, and describes the concept and characteristic of flexibility. From the view of the output change capacity of the wind farm in power grid, according to the change of load, we enumerate three kinds of time scales, and propose the flexibility evaluation model for the system response to the maximum change rate of wind farm output in power grid based on different time scales. Then, we explain the mathematical model of specific flexibility evaluation, and use interior point method to solve the model. Finally, taking Gansu power system as an example, the proposed flexibility indices is illustrated by a specific example.

Key words: power system flexibility, wind power uncertainty, multi-time scale, evaluation index

CLC Number:

TM 715

WANG Peng, LI Hongzhong, LYU Fenglei, SUN Weiqing, QIU Wenping, WU Junling. Multi-Time Scale Flexible Indices of Power System[J]. Electric Power Construction, 2016, 37(2): 57-62.

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