基于储能荷电状态的主从控制微电网离网协调控制策略

双碳和新型电力系统建设目标下集成优化资源的微电网将是电网公司实现该目标的重要载体。微电网支持并网或离网运行,其离网运行可以提高供电可靠性,这是微电网的重要特性。离网运行的微电网需要合适的稳态控制策略,以保证微电网的长期稳定运行。目前一些依赖预测信息和采用模糊智能算法的能量管理方法在微电网的长期实际运行中会产生较大的稳态控制误差。为了更好地解决微电网离网运行时电力电量平衡定量的计算问题,提高微电网离网稳态控制精度,研究了基于储能电池荷电状态的主从控制微电网离网实时稳态协调控制策略,提出了微电网离网有功协调控制间歇电源调整、负荷调整、微电网停运等关键操作中储能荷电状态控制节点值的精确工程计算方法。针对实际微电网应用工程开展了协调控制策略的具体应用,仿真和实际运行证明了所提控制策略和计算方法的有效性。

Off-grid coordinated control strategy of a master/slave control microgrid based on the state of charge of energy storage

A microgrid which integrates and optimizes resources within the goal of dual-carbon and new power system construction will be an important carrier for grid companies.The microgrid supports grid-connected or off-grid operation,and its off-grid operation can improve the reliability of power supply.This is an important feature of the microgrid.The off-grid microgrid requires a suitable steady-state control strategy to ensure long-term stable operation.At present,some energy management methods that rely on predictive information and use fuzzy intelligent algorithms will produce greater state control error in the actual long-term operation of the microgrid.In order to better solve the problem of quantitative calculation of power and electricity balance during off-grid operation of the microgrid,and to improve the accuracy of off-grid steady-state control,the real-time steady-state coordination of an off-grid microgrid based on master-slave control of the energy storage battery state of charge is studied.The control strategy puts forward an accurate engineering calculation method for the control node value of the energy storage state of charge in key operations such as intermittent power supply adjustment,load adjustment,and microgrid outage in the off-grid active power coordinated control of the microgrid.The specific application of coordinated control strategy is carried out for an actual microgrid application project.Simulation and actual operation prove the effectiveness of the control strategy and calculation method.