可再生能源发电对配电系统安全的影响及对策

 可再生能源发电出力所具有的随机性、波动性给配电系统的安全、稳定运行带来严峻影响。为了保障可再生能源发电并网的安全、稳定,分析了以可再生能源发电为主的分布式电源并网对配电系统安全运行产生的功率传输、电能质量、频率稳定、孤岛效应、保护控制及规划设计等方面的问题。针对涉及的问题,分别从制定全面规范的并网导则与标准,可再生能源发电出力稳定性与可调控水平的提升,优化配电系统网络结构,制定协调的保护与控制策略,研究源、网、荷协调规划方法等5 个方面给出了相应解决建议。对面向可再生能源并网的源、网、荷协调规划理念与方法进行了深入探讨,并对规划模型的研究重点与难点进行了分析。

Impacts of renewable energy generations on the safety of the distribution system

The fluctuation and the randomness of REG's output have severe impacts on the safety and stability of the operation. To guarantee a stable operation of the distribution system, the important impacts of the REGs on the safety operation of the distribution system are analyzed in six aspects, including the power transmission, the power quality, the frequency stability, the islanding effects, the protection, and the planning. To cope with these impacts, the corresponding suggestions, such as the formulation of a comprehensive safety and stabilization guide, the optimization of the network structure, and the improvement of the REGs' stability and controllability, are proposed. Particularly, the coordinated planning method for the distribution network is discussed in detail. The in-depth analysis of the planning model is presented.