电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
17期
24-30
,共7页
李振坤%刘俊%杨帆%楼越焕%时姗姗
李振坤%劉俊%楊帆%樓越煥%時姍姍
리진곤%류준%양범%루월환%시산산
有源配电网%分布式电源%供电恢复%孤岛划分%主从控制%改进遗传算法
有源配電網%分佈式電源%供電恢複%孤島劃分%主從控製%改進遺傳算法
유원배전망%분포식전원%공전회복%고도화분%주종공제%개진유전산법
distribution network containing DG%distributed generator%power supply restoration%island dividing%master-slave control%improved genetic algorithm
随着分布式电源在配电网中渗透率的提高,利用DG的孤岛运行能力为故障后配电网中非故障区域的停电负荷恢复供电,可有效提高配电网的供电可靠性。在考虑功率平衡、DG 孤岛个数和配电网内联络开关的影响因素下,对有源配电网的恢复供电进行了研究。通过将备用联络线路等值为DG,在恢复决策过程中同时考虑DG与联络开关,提高了整体方案的优越性。在利用DG对负荷恢复供电的过程中,充分考虑了DG的类型及控制特性,通过将DG分为主电源和从电源,研究了主从控制模式下孤岛供电的恢复方案。在孤岛划分过程中,采用改进遗传算法进行了求解,结合有源配电网的网络结构以及故障后孤岛的主从控制模式,提出了染色体编码时的两大约束条件以及基因组与基因子块的概念,染色体间的交叉和变异操作全部基于基因组进行操作,有效避免了无效解的产生。最后对一包含3条馈线、7台DG的配电网进行了仿真研究,验证了所提方法的有效性。
隨著分佈式電源在配電網中滲透率的提高,利用DG的孤島運行能力為故障後配電網中非故障區域的停電負荷恢複供電,可有效提高配電網的供電可靠性。在攷慮功率平衡、DG 孤島箇數和配電網內聯絡開關的影響因素下,對有源配電網的恢複供電進行瞭研究。通過將備用聯絡線路等值為DG,在恢複決策過程中同時攷慮DG與聯絡開關,提高瞭整體方案的優越性。在利用DG對負荷恢複供電的過程中,充分攷慮瞭DG的類型及控製特性,通過將DG分為主電源和從電源,研究瞭主從控製模式下孤島供電的恢複方案。在孤島劃分過程中,採用改進遺傳算法進行瞭求解,結閤有源配電網的網絡結構以及故障後孤島的主從控製模式,提齣瞭染色體編碼時的兩大約束條件以及基因組與基因子塊的概唸,染色體間的交扠和變異操作全部基于基因組進行操作,有效避免瞭無效解的產生。最後對一包含3條饋線、7檯DG的配電網進行瞭倣真研究,驗證瞭所提方法的有效性。
수착분포식전원재배전망중삼투솔적제고,이용DG적고도운행능력위고장후배전망중비고장구역적정전부하회복공전,가유효제고배전망적공전가고성。재고필공솔평형、DG 고도개수화배전망내련락개관적영향인소하,대유원배전망적회복공전진행료연구。통과장비용련락선로등치위DG,재회복결책과정중동시고필DG여련락개관,제고료정체방안적우월성。재이용DG대부하회복공전적과정중,충분고필료DG적류형급공제특성,통과장DG분위주전원화종전원,연구료주종공제모식하고도공전적회복방안。재고도화분과정중,채용개진유전산법진행료구해,결합유원배전망적망락결구이급고장후고도적주종공제모식,제출료염색체편마시적량대약속조건이급기인조여기인자괴적개념,염색체간적교차화변이조작전부기우기인조진행조작,유효피면료무효해적산생。최후대일포함3조궤선、7태DG적배전망진행료방진연구,험증료소제방법적유효성。
With the development of DG, using its islanding operation ability to restore power supply after fault can effectively improve the reliability of power supply distribution network. In this paper, the power balance, number of islands and the effect of tie switch are all considered, and the comprehensive restoration of active distribution network is researched. Through the DG equivalence of standby contact line, DG and contact switch and all considered in the decision-making process in recovery, so the overall scheme superiority is improved. In the process of load restoration using DG, the type and control characteristic of DG are fully considered, and based on master-slave control mode the DG islands is divided, finally the load of each island is selected by the maximum load power circle algorithm. An improved genetic algorithm is used to solve the islanding problem, combined with the network structure of active distribution network and the master-slave control mode, two major constraints are put forward, and the concept of genomic and gene block is proposed. The crossover and mutation operation of GA are both based on genome, which effectively avoids the invalid solution. Finally, a simulation study is performed on a distribution network consists of 3 line, 7 sets of DG, and the results verify the effectiveness of the proposed method.