摘要
最优潮流虽可实现无功功率的合理分布,但需借助一定的目标函数并通过一定的优化方法才能求得,过程复杂,计算效率较低。常规潮流的计算效率虽可保证,但无功功率的分布结果过分依赖于PV节点和平衡节点的选取,人为性较大。针对这一问题,基于无功功率的区域平衡分析及与电气距离相关的无功功率分配因子的求取,提出无功功率的平衡规则及基于规则的无功潮流调整方法。此方法无功迭代过程的节点无功功率失配量依据无功平衡规则进行补偿,并在迭代过程的后期通过一定的交接规则平滑过渡到常规潮流,促使整个算法快速收敛。研究结果表明,所提方法能在满足节点电压和无功功率约束的前提下使系统的无功潮流得到合理调整,并取得就地平衡的效果。
Optimal power flow (OPF) can make reactive power distribution be reasonable, but its computation must use some objective function and some optimal method, so it is complicated and lower effective. Usual power flow algorithm is more effective than OPF, but its computation result of reactive power distribution excessively relies on the selection of PV nodes and swing node, and is factitious in some degree. For the problem, this paper proposes some reactive-power-balance rules and a method for adjusting reactive power flow. These rules are based on the analysis of reactive-power-local-balance characteristics and the computation of distribution factors by using electric distance. Node unmatched reactive power in the procedure of iteration is compensated according to the rules. The procedure of iteration needs to smoothly translate into usual power flow procedure in the last term via some hand-over rules, which can make the computation converge quickly. The results indicate that this method can adjust reactive power flow reasonably, and balance reactive power locally under the restrictions of voltage and reactive power.
出处
《中国电力》
CSCD
北大核心
2004年第2期40-44,共5页
Electric Power
