城市高压配电网负荷转供辅助决策关键技术与系统

城市电网灵活性不足是造成系统调峰与输电阻塞问题的根本原因，为解决这一问题，提出了一种考虑城市高压配电网负荷转供及储能充放电策略的协同优化策略，并开发了一套可实现高压配电网灵活运行调度的在线辅助决策系统。通过分析城市高压配电网的拓扑特点，在其变电单元简化拓扑建模的基础上，分别以最小化220 kV输电网运行成本和110 kV高压配电网负荷削减成本为上、下层目标，建立时序双层优化模型，通过上下层模型的不断交替迭代，实现对高压配电网拓扑状态及储能运行状态的求解；基于高压配电网标准化站内接线的电气拓扑聚合通用方法，开发了一套可满足高压配电网灵活调度的运行控制与决策支持系统，以实现城市高压配电系统分布式新能源和储能广泛发展的运行方式优化以及调峰与负荷转供策略制定。最后，以某地区电网为例进行方法建模和实用性分析，测试并验证了所提方法的可行性与应用前景。

Key technology and system for auxiliary decision-making of load transfer in urban high voltage distribution network

The lack of flexibility in the urban power grid is the root reason for system peak regulation and transmission congestion, to solve this problem, a collaborative optimization strategy considering the load transfer and charging and discharging strategy of energy storage in the urban high voltage distribution network is proposed, and a set of online auxiliary decision-making system is developed to realize flexible operation scheduling of the high voltage distribution network. Through analyzing the topological characteristics of urban high voltage distribution network, based on the simplified topological modeling of its substation unit, the time-series bi-level optimization model is established, in which taking the minimum of the operating cost of 220 kV transmission network and load reduction cost of 110 kV high-voltage distribution network as the upper-level and lower-level objectives respectively. The topological state of the high voltage distribution network and the running state of the energy storage are solved by the alternating iterations of upper-level and lower-level models. Based on the general method of electrical topology aggregation in the standardized stations of the high voltage distribution network, a set of operation control and decision support system is developed, which can satisfy the flexible scheduling of the high voltage distribution network, so that reali-zing the operation mode optimization of extensive development for distributed new energy and energy storage in urban high voltage distribution system, as well as the formulation of peak regulation and load transfer strategy. Finally, a regional power grid is taken as an example for modeling and practical analysis, and the feasibility and application prospect of the proposed method are tested and verified.