Economic Dispatch of Islanded Microgrid Considering a Cooperative Strategy Between Diesel Generator and Battery Energy Storage System

For the impact of intermittent resources’ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, considering a cooperative strategy between diesel generator (hereinafter referred to as DE) and battery energy storage system (BESS). The optimum economic operation range of DE and the optimal set-point between DE and BESS are presented in the cooperative dispatch strategy, in which BESS is used fully to enable DE in a lower cost and higher efficient way. The results are analyzed under various operation conditions and also prove the validity of the proposed method.     

阶段约束下Gauss配点离散化平行车位自动泊车轨迹规划

针对平行车位自动泊车高精度轨迹规划，提出一种联立多阶段划分和非均匀Gauss配点参数化的轨迹优化算法。首先，结合车辆泊车动力学方程和约束条件建立了平行自动泊车数学模型；然后，根据泊车过程，提出将泊车过程划分为泊车起动、接近车位、进入车位、姿态调整、泊车落位5个阶段，并建立各阶段对应的不等式约束条件；进一步，在伪谱法算法框架下，结合阶段约束给出了多阶段局部高斯配点策略，以此实现分阶段独立配点离散，从而提高泊车轨迹规划的精准度和适应性；最后，在通用小型汽车模型上在长短车位上进行仿真测试，验证提出方法的正确性和适应性。结果显示，相较于分段区域Gauss伪谱法，改进方法在获得平滑泊车轨迹的同时泊车时间平均减少2.976 s，时间性能提升21.7%，表明了所提算法的有效性。