CAJ | 학술논문

针对目前低压配电网线损计算精度不高的情况，基于高级量测体系(advanced metering infrastructure，AMI)提供的精准用电侧数据，提出一种精确计算与分析低压配电网线损的方法：一是将窃电因素计入理论线损中，为了检测低压配网中普通用户的窃电情况并估计窃电量，引入公共结合点(point of coupling，PC)与比较集合的概念，并提出利用AMI智能电表提供的用户电压和电流数据计算电压差的方法；二是将智能电表采集的电压和电流数据作为初始输入同时更新窃电点电流，然后采用三相前推回代潮流算法更新支路电流，最后计算低压配电网络中的各类损耗及其所占比例。算例为一个农村低压配电网，在进行窃电检测后按是否计入窃电2种情况应用所提方法计算线损，计算结果反映了各类损耗所占比例以及窃电对线损的重要影响，验证了所提方法有效、可行。
침대목전저압배전망선손계산정도불고적정황，기우고급량측체계(advanced metering infrastructure，AMI)제공적정준용전측수거，제출일충정학계산여분석저압배전망선손적방법：일시장절전인소계입이론선손중，위료검측저압배망중보통용호적절전정황병고계절전량，인입공공결합점(point of coupling，PC)여비교집합적개념，병제출이용AMI지능전표제공적용호전압화전류수거계산전압차적방법；이시장지능전표채집적전압화전류수거작위초시수입동시경신절전점전류，연후채용삼상전추회대조류산법경신지로전류，최후계산저압배전망락중적각류손모급기소점비례。산례위일개농촌저압배전망，재진행절전검측후안시부계입절전2충정황응용소제방법계산선손，계산결과반영료각류손모소점비례이급절전대선손적중요영향，험증료소제방법유효、가행。
Aiming at low accuracy problem of theoretical line loss calculation of LV distribution network, this paper presents an accurate line loss calculation and analysis method for LV distribution network using customer’s accurate data provided by Advanced Metering Infrastructure (AMI). Firstly, energy theft is considered in composition of theoretical line losses. For theft detection and estimation of active power loss due to theft, concepts of point of coupling (PC) and comparative set are introduced, and voltage difference method is put forward using customer’s voltage and current data provided by AMI smart metering measurements. Secondly, a forth-back sweep three-phase power flow algorithm is used to update branch current and calculate different types of loss in network, once voltage and current data measured with smart meters are initiated and unmeasured currents caused by energy theft are compensated. A rural LV distribution network is used for case study considering whether energy theft is included in calculation after energy theft detection. Results illustrate proportions of different types of loss and reflect that energy theft has a significant influence on line losses. The proposed method is proved valid and feasible.