Spatial Distribution of Grid Inertia and Dynamic Flexibility: Approximations and Applications

被引:13
|
作者
Brahma, Debargha [1 ]
Senroy, Nilanjan [1 ]
机构
[1] Indian Inst Technol, Dept Elect Engn, New Delhi 110016, India
关键词
Indexes; Power system dynamics; Power system stability; Stability criteria; Oscillators; Vehicle dynamics; Perturbation methods; Dynamic grid flexibility; center of inertia; flexible bus; synchronizing torque; small-signal stability; coherent bus groups; OPERATIONAL FLEXIBILITY; SLOW COHERENCY; POWER-SYSTEMS; SENSITIVITY-ANALYSIS; LOADS; RANKING; MODEL;
D O I
10.1109/TPWRS.2021.3050085
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Dynamic grid flexibility is a new paradigm in power system flexibility studies which incorporates grid flexibility with grid stability. This paper explores the two metrics that are used to define the dynamic flexibility framework - inertial index and dynamic flexibility index, and aims to improve their computational efficiency, robustness, and develop smoothing strategies to mitigate the impact of fluctuating power injection from renewable energy sources (RES) on the inter-area oscillatory mode of the system. A novel and robust approximate flexibility index is formulated analytically, which provides a faster yet reliable alternative to the existing flexibility indexing method. The accuracy and computational efficiency of the improved index is compared against previous method through simulation studies performed on the 39-bus system. Application of these indices to understand the implications of RES sitting strategies on grid dynamics, and to develop local mitigation strategies for cost-effective smoothing controller placements, are discussed for the Indian Northern Regional Power Grid (NRPG).
引用
收藏
页码:3465 / 3474
页数:10
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