电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2014年
11期
3268-3273
,共6页
高山山%秦文萍%韩肖清%王鹏%王海明
高山山%秦文萍%韓肖清%王鵬%王海明
고산산%진문평%한초청%왕붕%왕해명
不平衡配电网%两级实时重构%时变性%DG出力波动%最大概率重构 (MPR)
不平衡配電網%兩級實時重構%時變性%DG齣力波動%最大概率重構 (MPR)
불평형배전망%량급실시중구%시변성%DG출력파동%최대개솔중구 (MPR)
unbalanced distribution network%two-stage real-time reconfiguration (RTR)%time-variance%DG output fluctuation%maximum probability reconfiguration (MPR)
针对分布式电源(distributed generation,DG)接入配电网的特点提出两级实时重构的概念。两级实时重构是指正常运行方式下的最大概率重构(maximum probability reconfiguration,MPR),以及当DG出力或者负荷出现较大波动时,网络拓扑快速响应为实时重构(real-time reconfiguration,RTR)的运行方式。所提两级实时重构模型及方法重点考虑了DG出力和负荷的时变性、负荷的静态电压特性以及配电网的三相不平衡特性。文中比较了4种配电网重构方式的网损和网损率:始终维持原始拓扑结构、15 min实时重构、两级实时重构以及系统在额定负荷和额定DG出力水平下的最优重构。改进的IEEE 16节点和IEEE 34节点配电系统的仿真分析表明,所提的两级实时重构方法不仅能有效降低系统网损,同时提高了系统运行的安全性和可靠性。
針對分佈式電源(distributed generation,DG)接入配電網的特點提齣兩級實時重構的概唸。兩級實時重構是指正常運行方式下的最大概率重構(maximum probability reconfiguration,MPR),以及噹DG齣力或者負荷齣現較大波動時,網絡拓撲快速響應為實時重構(real-time reconfiguration,RTR)的運行方式。所提兩級實時重構模型及方法重點攷慮瞭DG齣力和負荷的時變性、負荷的靜態電壓特性以及配電網的三相不平衡特性。文中比較瞭4種配電網重構方式的網損和網損率:始終維持原始拓撲結構、15 min實時重構、兩級實時重構以及繫統在額定負荷和額定DG齣力水平下的最優重構。改進的IEEE 16節點和IEEE 34節點配電繫統的倣真分析錶明,所提的兩級實時重構方法不僅能有效降低繫統網損,同時提高瞭繫統運行的安全性和可靠性。
침대분포식전원(distributed generation,DG)접입배전망적특점제출량급실시중구적개념。량급실시중구시지정상운행방식하적최대개솔중구(maximum probability reconfiguration,MPR),이급당DG출력혹자부하출현교대파동시,망락탁복쾌속향응위실시중구(real-time reconfiguration,RTR)적운행방식。소제량급실시중구모형급방법중점고필료DG출력화부하적시변성、부하적정태전압특성이급배전망적삼상불평형특성。문중비교료4충배전망중구방식적망손화망손솔:시종유지원시탁복결구、15 min실시중구、량급실시중구이급계통재액정부하화액정DG출력수평하적최우중구。개진적IEEE 16절점화IEEE 34절점배전계통적방진분석표명,소제적량급실시중구방법불부능유효강저계통망손,동시제고료계통운행적안전성화가고성。
Based on the features of network-connected distributed generation (DG) a concept of two-stage real-time reconfiguration of distribution network is proposed. The proposed two-stage real-time reconfiguration means the network reconfiguration under two kinds of operating modes, one is the maximum probability reconfiguration (MPR) under normal operating mode and the other is the real-time reconfiguration (RTR) resulted as the fast response of network topology under obvious fluctuation of load or DG output. The method and the model of two-stage real-time reconfiguration of distribution network, in which the time-variance of load and DG output, the static voltage characteristic of load and the three-phase imbalance of distribution network are emphatically considered, are put forward. The network loss and network loss rate under four kinds of reconfiguration modes of distribution network, namely always maintaining the original topological structure, the RTR in each time interval of 15 minutes, the two-stage RTR and the optimized reconfiguration of distribution network under rated load and rated DG output level, are compared. Simulation results of modified IEEE 16-bus system and IEEE 34-bus system show that using the proposed two-stage RTR method not only the distribution network loss can be effectively reduced, but also both security and reliability of distribution network can be enhanced.