負荷電壓靜態(tài)特性的含分布式電源的前推回代潮流計算
張佩炯
(中鐵二院西北勘察設(shè)計有限責(zé)任公司,甘肅 蘭州 730030)
摘 要:分布式電源并網(wǎng)后,配電網(wǎng)中出現(xiàn)了新的節(jié)點類型,使得傳統(tǒng)的前推回代法不能解決含分布式電源的配電網(wǎng)潮流計算。在考慮恒功率、恒電流及恒阻抗的負荷電壓靜態(tài)特性的情況下,提出了改進的前推回代法對不同分布式電源進行潮流計算。該算法針對風(fēng)力發(fā)電、光伏電池、燃料電池及燃氣輪機,分別建立了數(shù)學(xué)模型,并且在處理PV 節(jié)點時,通過無功分?jǐn)傇碓O(shè)定無功初值,采用無功補償裝置進行功率修正;針對輻射狀配電網(wǎng)特征,采用搜索葉節(jié)點的方法,形成了便于前推及回代計算的參數(shù)矩陣。通過IEEE33 配電系統(tǒng)驗證表明,提出的方法收斂性能強,能有效解決含不同分布式電源的潮流計算。
關(guān)鍵詞:分布式電源;潮流計算;前推回代;配電網(wǎng)
中圖分類號:TM714 文獻標(biāo)識碼:A 文章編號:1007-3175(2016)03-0010-06
Forward-Backward Sweep Power Flow Calculation with Distributed Generation Considering Static Load Characteristics
ZHANG Pei-jiong
(CREEC Northwest Survey and Design Co., Ltd, Lanzhou 730030, China)
Abstract: Distributed generation connection leads to that the new kinds of nodes appear in distribution network, to make the traditional calculation method of forward-backward sweep power flow fail. Based on the static characteristics of load voltage of constant power, constant current and constant resistance, this paper proposed an improved forward-backward sweep method for power flow calculation of different kinds of node types of distributed generation. The method focused on the wind power, photovoltaic cells, fuel cell and gas turbine, and established the mathematical modeling respectively. When dealing with the PV node, this design used a reactive power compensation device for power correction, adopting the reactive power allocation principle to determine the initial value. In allusion to the radial distribution characteristics, the method of searching the leaf node was adopted to form a convenient parameter matrix. The IEEE33 distribution system verifies that the convergence performance of the proposed method is strong. This method can effectively solve the problem of power flow calculation of containing different distributed generation.
Key words: distributed generation; load flow calculation; forward-backward sweep; power distribution network
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