独立运行方式下的微电网能量优化管理

针对独立运行方式下的微电网经济运行和管理问题,提出了独立运行方式下的微电网能量优化管理方法,该方法通过缩减下垂控制单元的基点运行功率范围,使其具有类似于传统发电机组自动发电量控制(AGC)的功率调节裕量,以吸纳实时调度周期内的非计划瞬时波动功率;在每次调度时刻,根据系统净负荷功率大小和可控型微电源的基点运行功率范围之间的关系,采用不同的能量调度策略,并引入负荷竞价策略,增加了切负荷和卸荷控制作为功率调节手段,建立了所涉及的负荷优化分配模型和负荷可中断优化模型。最后,通过一个微电网系统算例验证了该方法的有效性。

Optimal energy management of microgrid in standalone operation mode

Aiming at the economic operation and management of microgrid in standalone operation mode,an optimal energy management method for microgrid in standalone operation mode was proposed.The range of primary operating power of droop control micro-source was reduced in this method,in order to ensure it with enough power regulating margin which was similar to automatic generation control（AGC） of conventional generators for absorbing non-planed instantaneous power in microgrid.In each dispatch time,different energy dispatch strategies were used according to the relation of the net load power and ranges of primary operating power of controllable micro-sources.Load bidding strategy was used,while load shedding and excess-power dissipating were added to power regulation means.The optimal load distribution model and optimal interruptible load model were built.Case study results indicate the effectiveness of the proposed optimal energy management method.