CAJ | 학술논문

基于实时测量信息的戴维南等值方法，为多机系统输电通道静稳极限在线监视提供了新的研究思路。本文结合电力系统实际运行状态的特点，通过分析戴维南等值方法的适用条件，提出一种内电势相角可变的戴维南等值模型，并使用具有可变遗忘因子的改进递推最小二乘法在线辨识戴维南等值参数，从而将多机系统等值成双机系统；利用等值后的双机系统快速求取输电通道的静稳极限；借助输电通道静稳极限的求取思路，文中也给出了在线监视多机系统静态稳定水平分布的方法。对IEEE39节点系统进行仿真，仿真结果表明本文计算方法能够较好地辨识戴维南等值参数，可有效估计输电通道的静态稳定性。
기우실시측량신식적대유남등치방법，위다궤계통수전통도정은겁한재선감시제공료신적연구사로。본문결합전력계통실제운행상태적특점，통과분석대유남등치방법적괄용조건，제출일충내전세상각가변적대유남등치모형，병사용구유가변유망인자적개진체추최소이승법재선변식대유남등치삼수，종이장다궤계통등치성쌍궤계통；이용등치후적쌍궤계통쾌속구취수전통도적정은겁한；차조수전통도정은겁한적구취사로，문중야급출료재선감시다궤계통정태은정수평분포적방법。대IEEE39절점계통진행방진，방진결과표명본문계산방법능구교호지변식대유남등치삼수，가유효고계수전통도적정태은정성。
Thevenin equivalent method based on real time measurement provides a new research approach for static stability limit transmission channel monitoring of multi-machines system.Combining the characteristics of the power system actual motion, through analyzing of the applicable conditions of Thevenin equivalent methods, a kind of Theve-nin equivalent model with variable potential phase angles is proposed in this paper.And recursive least squares with variable forgetting factors are used to get the Thevenin equivalent parameters, thus turning a multi-machines system in-to a dual system.Then, the static stability limit of transmission channel can be obtained quickly with the dual system. Moreover, the distribution of the static stability in the multi-machines online monitoring system can also be obtained easily with the help of the approach.The paper uses the IEEE39 system as a testing system.And the simulation re-sults demonstrate that the method proposed in this paper can identify the Thevenin equivalent parameters precisely and assess the static stability of the transmission channel effectively.