大规模分布式新能源接入对省级电网稳定性影响

doi:10.11930/j.issn.1004-9649.202405028

摘要/Abstract

摘要：

基于不同种类分布式新能源的暂态特性，建立各种新能源的典型模型，聚合为考虑分布式新能源的有源综合负荷模型，用于对工程实际省级电网的安全稳定分析。所提方法能有效反映新能源的低电压穿越、切机等特性对省级电网稳定性的复杂影响，其中火电机组直接退出分布式新能源消纳运行会导致大电网稳定性下降，当火电机组处于调峰状态时，对大电网暂态稳定性影响较小。

关键词: 分布式新能源, 有源综合负荷模型, 暂态稳定性分析

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

李佳蔚, 张冠宇. 大规模分布式新能源接入对省级电网稳定性影响[J]. 中国电力, 2024, 57(6): 174-180.

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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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202405028

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

图/表 7

图 1 A类新能源低电压穿越特性

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

图 2 B类新能源封波特性

Fig.2 Wave sealing process characteristic of RES-B

图 3 双馈风机低电压穿越特性

Fig.3 Low voltage ride through characteristic of DFIG

图 4 网络模型

Fig.4 Network model

图 5 网供负荷不变下N–2故障后系统状态

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

图 6 网供负荷不变下直流闭锁后系统状态

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

图 7 全网负荷不变下N–2故障后系统状态

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

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