CAJ | 학술논문

电网支路参数的误差会导致能量管理系统的状态估计结果不准确,从而影响其他高级应用软件结果的可靠性和准确性,因此,状态估计程序应具有辨识和估计参数的功能。为此,首先利用戴维南定理将待估计线路外网等值为近似线性模型,对参数可估计性进行分析,提出参数估计中的主导参数和非主导参数；然后从目标函数入手,研究了待估计线路参数对状态估计的影响程度,并给出支路参数主导性评估方法；针对传统加权最小二乘估计(weighted least squares,WLS)易受不良数据影响的特点,将最大指数型目标函数估计(maximum ex-ponential square,MES)引入主导性评估中。IEEE-14节点系统和我国某省网实际系统的仿真结果验证了所提方法的有效性。
전망지로삼수적오차회도치능량관리계통적상태고계결과불준학,종이영향기타고급응용연건결과적가고성화준학성,인차,상태고계정서응구유변식화고계삼수적공능。위차,수선이용대유남정리장대고계선로외망등치위근사선성모형,대삼수가고계성진행분석,제출삼수고계중적주도삼수화비주도삼수；연후종목표함수입수,연구료대고계선로삼수대상태고계적영향정도,병급출지로삼수주도성평고방법；침대전통가권최소이승고계(weighted least squares,WLS)역수불량수거영향적특점,장최대지수형목표함수고계(maximum ex-ponential square,MES)인입주도성평고중。IEEE-14절점계통화아국모성망실제계통적방진결과험증료소제방법적유효성。
Errors of power grid branch parameters may cause inaccurate state estimation result of energy management system which would affect reliability and accuracy of other advanced application software results.Therefore,state estimation pro-gram should be provided with functions of recognizing and estimating parameters.Thus,estimability of parameters were an-alyzed by using Thevenin theorem for regarding external network of lines to be estimated as an equivalent linear model and the dominance parameter and non-dominance parameter was proposed.Starting from objective function,impact degree on state estimation by estimability of parameters was studied and assessment method for dominance of branch parameters was put forward.Aiming at characteristic of traditional weighted least squares that was easy to be affected by bad data,maxi-mum exponential square was introduced into dominance assessment.Simulation results of IEEE-1 4 node system and some provincial power grid system in our country verified effectiveness of the proposed method.