电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
19期
81-86
,共6页
配网系统%状态估计%馈线树%伪量测%可观测
配網繫統%狀態估計%饋線樹%偽量測%可觀測
배망계통%상태고계%궤선수%위량측%가관측
distribution network%state estimation%feeder tree%pseudo measurement%observation
配网状态估计是其他高层应用软件的基础，量测充足系统可观测是状态估计的根本。针对配网系统量测冗余少且大多为电流量测的问题，提出根据配网运行参量间的关系把电流量测转化成状态估计所需的有功、无功量测，增加配网状态估计伪量测。提出利用配网辐射状特性形成馈线树，采用链表存储配网设备间的供电关系，利用前推回推方式补足伪量测。推导最优估计的电流匹配的方程及其求解方法，结合某城区配网实例进行分析，表明方法可行，该方法满足当前配电网自动化系统的实时需求。
配網狀態估計是其他高層應用軟件的基礎，量測充足繫統可觀測是狀態估計的根本。針對配網繫統量測冗餘少且大多為電流量測的問題，提齣根據配網運行參量間的關繫把電流量測轉化成狀態估計所需的有功、無功量測，增加配網狀態估計偽量測。提齣利用配網輻射狀特性形成饋線樹，採用鏈錶存儲配網設備間的供電關繫，利用前推迴推方式補足偽量測。推導最優估計的電流匹配的方程及其求解方法，結閤某城區配網實例進行分析，錶明方法可行，該方法滿足噹前配電網自動化繫統的實時需求。
배망상태고계시기타고층응용연건적기출，량측충족계통가관측시상태고계적근본。침대배망계통량측용여소차대다위전류량측적문제，제출근거배망운행삼량간적관계파전류량측전화성상태고계소수적유공、무공량측，증가배망상태고계위량측。제출이용배망복사상특성형성궤선수，채용련표존저배망설비간적공전관계，이용전추회추방식보족위량측。추도최우고계적전류필배적방정급기구해방법，결합모성구배망실례진행분석，표명방법가행，해방법만족당전배전망자동화계통적실시수구。
State estimation is the base of distribution network application software. Enough measurement is the base of observation. By taking into account the real-time measurements with low redundancy and most of them are current measurements, based on the relationship among the distribution network running parameters, the method getting active and reactive power measurements using electric current measurement is proposed. Using the method can add many pseudo measurements. According to radial operation feature of electric distribution network, the feeder tree is formed, and the linked list is used to keep the relationship among the elements in the distribution network. The forward-backward sweep method is adopted in adding pseudo measurements. The matching current equations in the sense of optimal estimation and its systematic solution are deduced. The result of an actual system shows that the proposed method is feasible. The method proposed can satisfy the real-time application demand of the distribution system.
