Cooperative Control of Aggregated Loads at Demand Side for Accommodating New Energy; [面向新能源消纳的需求侧聚合负荷协同控制]

Abstract

Large-scale new energy generation can be connected to power grid under energy Internet. But imbalance between supply and demand in power grid may occur with high penetration of variable new-energy generation. For the problem of imbalance between supply and demand, this paper, taking electric water heater (EWH) load as an example, proposes a cooperative control tactics of aggregated EWH loads at demand side. The objective is to accommodate redundant new-energy power to keep balance between supply and demand in power grid. For this objective, firstly, system architecture for accommodating new energy through aggregated EWHs is presented. Secondly, an information control model of a EWH load and thermostat setpoint principle in the load aggregation system under the system architecture is put forward. Then the implementation architecture of the cooperative control tactics, including state awareness, real-time analysis, scientific decision-making and accurate execution, is presented, and the logics of the tactics of state awareness, real-time analysis, scientific decision-making and precise execution are designed. Finally, simulation results show effectiveness and advantage of the proposed cooperative control tactics.