【摘要】 针对电力系统的多时段无功优化问题,在基于统计学原理分时段方法的基础上,提出了一种基于无功调节设备一天内最大调节次数的启发式迭代分时段算法,从而可以根据负荷变化的趋势得到无功控制设备动作的时间点.时间点确定之后,即可应用单一负荷下的静态无功优化研究成果,计算得到无功控制设备的调节状态.该方法可以自适应地修正划分时段的门槛值,从而保证了分段的结果具有可操作性.IEEE-39节点算例的分时段无功优化计算从网损、设备动作次数、计算量3个方面说明了本文所提出的分时段策略的有效性,表明了本方法不仅可明显降低网损,而且可以简化无功优化控制操作.更多还原

【Abstract】 A heuristic iterative algorithm for transition-optimised control strategy,which considers the maximum allowable daily switching time of control devices,is presented by statistics analyzing based load profile partitioning algorithm.Essentially it considers voltage and reactive power control as a time-based scheduling problem,with the intention of avoiding unnecessary changes in status and output of reactive control device.The demand profile can be classified adaptively using the proposed heuristic iteration method through evaluating the standard deviation and the range of the sequence of load demand points.Furthermore,an algorithmic transition-optimized model of the voltage/var control is then presented based on demand pattern classification.The solution algorithm and different control strategies are studied in the transition-optimization.From the power loss,switching times of control devices and computation burden,the calculation for IEEE-39 system shows that this method is reasonable and valid.Moreover,case studies illustrate that the integrated algorithmic and heuristic technique for transition-optimised voltage and reactive power control not only effectively reduces power losses but also greatly simplifies control operations.更多还原