基于概率潮流的主动配电网供需群体协同优化运行策略

发布时间：2019-01-10 18:34

【摘要】：为有效解决主动配电网(ADN)运行模式中供应侧和需求侧响应量的不确定性给电网安全带来的问题,在传统概率潮流模型基础上,将虚拟微网与ADN交换功率及需求侧响应的不确定性视为新的随机注入变量,搭建了供需群体互动的概率潮流模型。利用概率潮流的计算结果,使距期望值波动的3个标准差内的数值落在约束范围内,作为系统运行的不等式约束条件。在此基础上,以ADN运行成本最小为优化目标,制定基于概率潮流的ADN供需群体协同优化运行策略,确定了供需互动模式下各互动节点的响应量。该模型既避免了传统配电网运行模型中仅由上级主网承担系统不平衡功率的情况,又有效地提高了系统运行的安全性与经济性。最后,通过算例验证了该模型的有效性和实用性。
[Abstract]:In order to effectively solve the security problems caused by the uncertainty of supply-side and demand-side response in the (ADN) operation mode of active distribution network, the traditional probabilistic power flow model is used to solve the problem. The uncertainty of switching power and demand-side response between virtual microgrid and ADN is regarded as a new random injection variable, and a probabilistic power flow model for the interaction between supply and demand groups is built. By using the calculation results of the probabilistic power flow, the values within the three standard deviations from the expected value fluctuation are placed within the constraint range, which is regarded as the inequality constraint condition for the operation of the system. On this basis, taking the minimum operating cost of ADN as the optimization goal, the cooperative optimization strategy of ADN supply and demand groups based on probabilistic power flow is formulated, and the response quantity of each interactive node in the interactive mode of supply and demand is determined. This model not only avoids the unbalanced power of the system in the traditional distribution network operation model, but also effectively improves the security and economy of the system. Finally, the validity and practicability of the model are verified by an example.
【作者单位】：华北电力大学电气与电子工程学院;
【分类号】：TM732;TM74

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