基于飞轮储能和蓄电池的微电网控制策略

Control strategy of microgrid based on flywheel storage and lead-acid battery

微电网作为一特殊的电网运行方式,可运行在并网和孤岛两种模式下。对微电网中的电源及整个微网进行有效控制是微电网技术中的关键。为保证微电网的稳定可靠运行,并在运行模式改变时,完成有效、平滑的切换,在构建不同类型的分布式电源的基础上,提出了以蓄电池为主电源,用飞轮保证不间断供电的微电网系统协调控制方法。该控制方法保证了微电网经济、稳定运行和良好的供电质量,并且能够在微网运行模式切换过程中维持其内部不间断供电并大幅减少暂态冲击,迅速过渡到稳态运行。建模仿真结果证明了该控制策略的有效性和精确性。

As a special way of grid running,microgrid can operate in both grid-connected mode and isolated mode.Effective control strategy for distrbuted sources and the whole microgrid is the key technology of microgrid.To ensure stable and reliable operation of the microgrid,effective and smooth switch between different operating modes,a coordinated control method of using lead-acid battery as the main source and the flywheel to keep uninterrupted power supply was proposed based on modeling different kinds of distributed source.The stabile operation and good quality of power supply were guaranteed by this method.The uninterrupted power supply for load in the microgrid during switching process between the two modes was ensured,as well as the transient oscillation was dramatically reduced for transiting to the steady state swiftly.Modeling and simulation results show the efficiency and precision of the proposed method.