电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2015年
16期
49-58
,共10页
刘伟佳%孙磊%林振智%福拴
劉偉佳%孫磊%林振智%福拴
류위가%손뢰%림진지%복전
配电系统恢复%微网(微电网)%间歇性电源%储能系统%电动汽车%可控负荷
配電繫統恢複%微網(微電網)%間歇性電源%儲能繫統%電動汽車%可控負荷
배전계통회복%미망(미전망)%간헐성전원%저능계통%전동기차%가공부하
distribution system restoration%microgrid%intermittent energy sources%energy storage system%electric vehicles%controllable loads
电力系统发生停电事故后，含有分布式电源和储能系统的配电系统可以形成孤岛运行的微网，在短时间内为微网内的停电负荷恢复供电。然而，风电和光伏等间歇性电源的发电出力具有不确定性，难以对孤岛内负荷进行持续、稳定供电。在此背景下，提出了计及间歇性电源出力不确定性的配电系统恢复优化模型。首先，考虑含有分布式电源、储能系统和可控负荷的配电系统，针对停电事故发生后一个较短时段内的供电恢复问题，提出了以最大化恢复供电的负荷用电量为目标的配电系统恢复模型。之后，分析各种分布式电源的出力特性和供电能力，并利用可控负荷平衡间歇性电源出力波动。考虑到间歇性电源出力的不确定性，利用概率模型对其出力预测值进行处理，这样就避免了在模型求解时再处理不确定性因素，从而可将配电系统恢复模型转换为混合整数二次规划问题并用 CPLEX 求解器求解。最后，以修改的 IEEE 33节点配电系统为例，对所提出的模型和方法进行了验证。
電力繫統髮生停電事故後，含有分佈式電源和儲能繫統的配電繫統可以形成孤島運行的微網，在短時間內為微網內的停電負荷恢複供電。然而，風電和光伏等間歇性電源的髮電齣力具有不確定性，難以對孤島內負荷進行持續、穩定供電。在此揹景下，提齣瞭計及間歇性電源齣力不確定性的配電繫統恢複優化模型。首先，攷慮含有分佈式電源、儲能繫統和可控負荷的配電繫統，針對停電事故髮生後一箇較短時段內的供電恢複問題，提齣瞭以最大化恢複供電的負荷用電量為目標的配電繫統恢複模型。之後，分析各種分佈式電源的齣力特性和供電能力，併利用可控負荷平衡間歇性電源齣力波動。攷慮到間歇性電源齣力的不確定性，利用概率模型對其齣力預測值進行處理，這樣就避免瞭在模型求解時再處理不確定性因素，從而可將配電繫統恢複模型轉換為混閤整數二次規劃問題併用 CPLEX 求解器求解。最後，以脩改的 IEEE 33節點配電繫統為例，對所提齣的模型和方法進行瞭驗證。
전력계통발생정전사고후，함유분포식전원화저능계통적배전계통가이형성고도운행적미망，재단시간내위미망내적정전부하회복공전。연이，풍전화광복등간헐성전원적발전출력구유불학정성，난이대고도내부하진행지속、은정공전。재차배경하，제출료계급간헐성전원출력불학정성적배전계통회복우화모형。수선，고필함유분포식전원、저능계통화가공부하적배전계통，침대정전사고발생후일개교단시단내적공전회복문제，제출료이최대화회복공전적부하용전량위목표적배전계통회복모형。지후，분석각충분포식전원적출력특성화공전능력，병이용가공부하평형간헐성전원출력파동。고필도간헐성전원출력적불학정성，이용개솔모형대기출력예측치진행처리，저양취피면료재모형구해시재처리불학정성인소，종이가장배전계통회복모형전환위혼합정수이차규화문제병용 CPLEX 구해기구해。최후，이수개적 IEEE 33절점배전계통위례，대소제출적모형화방법진행료험증。
A distribution system with distributed generators,energy storage systems and electric vehicles can be operated as an isolated microgrid and provide power supply to the interrupted loads in a short period after a fault-caused power supply interruption.However,as the output power of an intermittent energy source such as a wind turbine or a photovoltaic panel is generally fluctuant and stochastic,it is hardly possible to provide sustainable power supply to the power loads in the isolated island operating as a microgrid.Given this background,a strategy for short-period restoration of the isolated island considering the power output uncertainties of intermittent energy sources is presented.A restoration model for the isolated island with distributed generators,energy storage systems,electric vehicles and controllable loads is developed first,with the objective of providing continuous and stable power supply to the maximized amount of power load in a given period.The characteristics of different kinds of intermittent energy resources and their output capabilities are discussed next,and the controllable loads are employed to balance the power output fluctuations of these intermittent energy sources.Probabilistic models are utilized to describe the uncertainties of the predicted power outputs of the intermittent energy sources.The proposed restoration model is then transformed to a definite quadratic constrained integer programming one,and solved by the well-developed CPLEX solver. Finally,the proposed restoration strategy is verified by a modified IEEE 33-bus test system.
