Impact of Large Scale Distributed New Energy Access on Provincial Power Grid Stability

doi:10.11930/j.issn.1004-9649.202405028

Abstract

Abstract:

Based on the transient characteristics of different types of distributed new energy, typical models are established and aggregated into active comprehensive load models, which can be used for safety and stability analysis of provincial power grids. The results show that the proposed method can effectively reflect the complex impact of the low voltage ride through and wave sealing characteristics of new energy on the stability of provincial power grids. Among them, the direct withdrawal of thermal power units from distributed new energy consumption operation will lead to a decrease in the stability of the power grid. When thermal power units are in peak shaving state, the impact on the transient stability of the power grid is relatively small.

Key words: distributed new energy, active comprehensive load model, transient stability analysis

Jiawei LI, Guanyu ZHANG. Impact of Large Scale Distributed New Energy Access on Provincial Power Grid Stability[J]. Electric Power, 2024, 57(6): 174-180.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202405028

https://www.electricpower.com.cn/EN/Y2024/V57/I6/174

Figures/Tables 7

Fig.1 Low voltage ride through characteristic of RES-A

Fig.2 Wave sealing process characteristic of RES-B

Fig.3 Low voltage ride through characteristic of DFIG

Fig.4 Network model

Fig.5 State after N–2 fault under constant off-grid load

Fig.6 States after DC block under constant off-grid load

Fig.7 States after N–2 fault under constant system load

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