电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2015年
13期
8-15
,共8页
杨俊友%崔嘉%邢作霞%王海鑫%王刚
楊俊友%崔嘉%邢作霞%王海鑫%王剛
양준우%최가%형작하%왕해흠%왕강
风力发电%分散式风电场%功率预测%多时间尺度%双馈感应发电机%无功补偿%三层无功分配
風力髮電%分散式風電場%功率預測%多時間呎度%雙饋感應髮電機%無功補償%三層無功分配
풍력발전%분산식풍전장%공솔예측%다시간척도%쌍궤감응발전궤%무공보상%삼층무공분배
wind power generation%dispersed wind farm%power forecast%multiple-timescale%doubly fed induction generator (DFIG)%reactive power compensation%three-layer reactive power distribution
分散式风电接网模式可以解决集中式并网限电等问题,但对配电网传统运行模式带来挑战。为解决其经济稳定运行难题,提出了一种包含无功预测、无功整定、无功分配的三层新型分散式风电场无功协调控制策略。其中,无功预测层利用物理和统计方法组合预测单台机组未来无功输出能力;无功整定层针对有无无功补偿设备,提出风电机组基于电网无功缺额降出力的自身补偿和多时间尺度协调离散补偿设备、静止无功发生器(SVG)与风电机组共同补偿配电网无功需求方法;无功分配层基于风电功率预测无功功率信息,考虑风速波动性,按照优先级动态筛选风电机组,调节其输出功率以跟踪无功补偿指令。工程算例证明了所提策略可以有效提高电压支撑能力,减小风电场损耗。
分散式風電接網模式可以解決集中式併網限電等問題,但對配電網傳統運行模式帶來挑戰。為解決其經濟穩定運行難題,提齣瞭一種包含無功預測、無功整定、無功分配的三層新型分散式風電場無功協調控製策略。其中,無功預測層利用物理和統計方法組閤預測單檯機組未來無功輸齣能力;無功整定層針對有無無功補償設備,提齣風電機組基于電網無功缺額降齣力的自身補償和多時間呎度協調離散補償設備、靜止無功髮生器(SVG)與風電機組共同補償配電網無功需求方法;無功分配層基于風電功率預測無功功率信息,攷慮風速波動性,按照優先級動態篩選風電機組,調節其輸齣功率以跟蹤無功補償指令。工程算例證明瞭所提策略可以有效提高電壓支撐能力,減小風電場損耗。
분산식풍전접망모식가이해결집중식병망한전등문제,단대배전망전통운행모식대래도전。위해결기경제은정운행난제,제출료일충포함무공예측、무공정정、무공분배적삼층신형분산식풍전장무공협조공제책략。기중,무공예측층이용물리화통계방법조합예측단태궤조미래무공수출능력;무공정정층침대유무무공보상설비,제출풍전궤조기우전망무공결액강출력적자신보상화다시간척도협조리산보상설비、정지무공발생기(SVG)여풍전궤조공동보상배전망무공수구방법;무공분배층기우풍전공솔예측무공공솔신식,고필풍속파동성,안조우선급동태사선풍전궤조,조절기수출공솔이근종무공보상지령。공정산예증명료소제책략가이유효제고전압지탱능력,감소풍전장손모。
Dispersed wind power grid connection can resolve the problems caused by centralized grid connection,however,it is a challenge to the traditional power grid scheduling mode.In order to achieve economic and stable operation,a new three-layer reactive power coordinated control strategy including reactive power forecasting,setting and distribution for dispersed wind farm (DWF) is put forward based on wind power forecasting.The reactive power forecasting layer is used to forecast future reactive output of single wind turbine based on physical and statistical combination method.In the reactive power setting layer, considering reactive power compensation devices,a diminishing active power method is adopted.Depending on the required reactive power capacity,a multi-timescale coordinated method is adopted between discrete compensation equipment,static var generator (SVG) and wind turbines considering different timescales of compensation equipment. In the reactive power distribution layer,a new wind turbine reactive power distributed strategy is adj usted considering forecasting trend of each wind turbine.The wind turbines with adj ustable capability are selected according to dynamic filter coefficient considering reactive power forecasting and wind speed fluctuation to track reactive power demand.Engineering example proves that the proposed strategy improves the ability of supporting voltage and reduces the transmission losses of wind farm effectively. This work is supported by State Grid Corporation of China(No.DKYKJ[2012]001-1).