基于直流分布因子的可用输电能力灵敏度分析  

Study on Sensitivity of Available Transfer Capability Based on DC Distribution Factors

作　　者：蔡晓波[1] 吴政球[1] 匡文凯[1] 方日升[2] 王良缘[2] 李可文[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]福建电力调度通信中心,福建省福州市350001

出　　处：《电网技术》2006年第18期45-48,共4页Power System Technology

摘　　要：交易的可用输电能力是在一定的基态潮流下计算得到的,一旦节点功率发生变化,最大可用输电能力会发生变化。文章通过对基于直流分布因子的可用输电能力计算过程的分析,根据决定可用输电能力的关键约束线路或约束断面潮流在节点功率变化后的变化情况得到可用输电能力与节点功率之间的灵敏度,该灵敏度能给出节点功率变化后可用输电能力的变化趋势,可用于计算节点功率变化后交易的可用输电能力,在节点功率变化后可避免反复计算可用输电能力指标,灵敏度有效区间能保证灵敏度应用时的可信性。算例结果证明了所提出方法的有效性。Normally, the available transfer capability for a transaction is calculated by a given base power flow. Once nodal power changes, the maximum available transfer capability should be anew calculated. By means of analyzing the calculation process of available transfer capability based on DC distribution factors and according to the variation of key constrained lines or constrained tie line power flow determining available transfer capability after nodal power varied, the sensitivity between available transfer capability and nodal power can be obtained. This sensitivity reflects the varying trend of available transfer capability after nodal power varied and can be used to calculate the available transfer capability of the transaction after nodal power varied, so the repetitious calculation of available transfer capability after nodal power varied can be avoided and the effective interval of sensitivity can ensure the creditability while this sensitivity is applied. The effectiveness of the proposed method is verified by results of calculation example.

关 键 词：电力市场 可用输电能力 灵敏度 节点功率 灵敏度有效区间 

分 类 号：TM731[电气工程—电力系统及自动化]