端对端交易场景下配电网分布式储能的优化配置

高渗透率可再生能源接入配电网不仅促进了分布式发电技术以端对端(P2P)的形式参与市场竞争,也对电网的安全稳定运行提出了挑战.为了保证配电网中P2P交易的安全稳定进行,提高用户和储能供应商投资储能的收益,在2种交易方案下提出了一种双层优化储能配置方法.上层模型以储能总投资成本最小为目标,采集配电网一年的运行数据进行优化,计算出储能的配置规格传递给下层模型.下层模型考虑集中竞价和用户主导这2种P2P交易模式,引入区域边际价格的概念最大化买卖双方收益,优化调度储能充放电策略以最小化储能投资成本.最后,以IEEE 15节点配电网为算例验证了所提方法的有效性.

Optimal Configuration of Distributed Energy Storage for Distribution Network in Peer-to-peer Transaction Scenarios

The integration of high-penetration renewable energy into the distribution network not only promotes distributed generation technology to participate in market competition in the peer-to-peer (P2P) form, but also poses a challenge to the safe and stable operation of the power grid. In order to ensure the safe and stable P2P transactions in the distribution network and to improve the benefits of investing in energy storage for both users and storage suppliers, a two-layer optimal energy storage allocation method is proposed in two transaction scenarios. The upper-layer model aims at minimizing the total investment cost of energy storage, collects one year of operational data of the distribution network for optimization, and calculates the configuration specifications of energy storage to transfer to the lower layer model. The lower-layer model considers two P2P transaction modes, i.e. centralized-bidding and user-driven modes, introduces the concept of regional marginal price to maximize the benefits for both buyers and sellers, and optimally dispatches the energy storage charging and discharging strategies to minimize the energy storage investment costs. Finally, the effectiveness of the proposed method is verified by taking the IEEE 15-bus distribution network as an example.