Distributed generation (DG) is gaining in importance due to the growing demand for electrical energy and the key role it plays in reducing actual energy losses, lowering operating costs and improving voltage stability...Distributed generation (DG) is gaining in importance due to the growing demand for electrical energy and the key role it plays in reducing actual energy losses, lowering operating costs and improving voltage stability. In this paper, we propose to inject distributed power generation into a distribution system while minimizing active energy losses. This injection should be done at a grid node (which is a point where energy can be injected into or recovered from the grid) that will be considered the optimal node when total active losses in the radial distribution system are minimal. The focus is on meeting energy demand using renewable energy sources. The main criterion is the minimization of active energy losses during injection. The method used is the algorithm of bee colony (ABC) associated with Newtonian energy flow transfer equations. The method has been implemented in MATLAB for optimal node search in IEEE 14, 33 and 57 nodes networks. The active energy loss results of this hybrid algorithm were compared with the results of previous searches. This comparison shows that the proposed algorithm allows to have reduced losses with the power injected that we have found.展开更多
将智能优化算法与数值迭代方法有机组合,构造一种并联机构位置正解求解的通用算法——混合人工蜂群和Newton迭代(Hybrid artificial bee colony and Newton iteration,HABC-Newton)算法。将差分进化(Differential evolution,DE)算法融...将智能优化算法与数值迭代方法有机组合,构造一种并联机构位置正解求解的通用算法——混合人工蜂群和Newton迭代(Hybrid artificial bee colony and Newton iteration,HABC-Newton)算法。将差分进化(Differential evolution,DE)算法融入人工蜂群(Artificial bee colony,ABC)算法,形成一种能快速收敛到问题近优解的混合人工蜂群(Hybrid ABC,HABC)算法,再以该近优解为初值,应用Newton-Шамарский迭代法求出高精度位置正解。以4自由度4-SPS-CU并联机构正运动学分析为例,阐述基于HABC-Newton算法的并联机构正运动学分析方法。为了验证算法的有效性和普适性,给出4-SPS-CU、3-RRR两种耦合并联机构位置正解的数值算例。结果表明,HABC-Newton算法能以较少计算开销求得并联机构的全部高精度位置正解。还比较了HABC-Newton、ABC、DE和粒子群算法求并联机构位置正解的性能,数值实验显示,HABC-Newton算法的精度、稳健性和计算效率高于对比算法。展开更多
文摘Distributed generation (DG) is gaining in importance due to the growing demand for electrical energy and the key role it plays in reducing actual energy losses, lowering operating costs and improving voltage stability. In this paper, we propose to inject distributed power generation into a distribution system while minimizing active energy losses. This injection should be done at a grid node (which is a point where energy can be injected into or recovered from the grid) that will be considered the optimal node when total active losses in the radial distribution system are minimal. The focus is on meeting energy demand using renewable energy sources. The main criterion is the minimization of active energy losses during injection. The method used is the algorithm of bee colony (ABC) associated with Newtonian energy flow transfer equations. The method has been implemented in MATLAB for optimal node search in IEEE 14, 33 and 57 nodes networks. The active energy loss results of this hybrid algorithm were compared with the results of previous searches. This comparison shows that the proposed algorithm allows to have reduced losses with the power injected that we have found.
