基于调频层面的风电弃风分析

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摘要弃风已经成为制约风电产业发展的关键问题。弃风造成的原因主要有调峰调频能力和输电能力不足等。从调频层面来看,当电网频率越上限时,可依据电网调度部门指令控制风电场有功功率输出,甚至分步切除风电机组。为了分析调频层面分钟级的应急性弃风,利用有功功率盈余时风电场切机的调频灵敏度指标,选择最合适的风电切机策略,并基于频率越限过渡时间与负荷功率变化量的关系选取弃风的调频困难典型时段,再结合所选的风电切机策略,估算调频层面全年规划方案弃风电量。最后,基于DIgSILENT/PowerFactory分析软件,利用我国某区域2020年规划电网算例验证了所提方法的可行性和有效性。

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关键词 ：风电切机策略, 调频, 灵敏度分析, 弃风

Abstract：Wind power curtailment has been one of the key restricting factors behind the development of the wind power industry.The main reasons for wind power curtailment are inadequate peak and frequency adjustment capability as well as inadequate transmission capacity.As seen from the aspect of the frequency adjustment,the active power output of the wind farm should be reduced step by step according to the command from the dispatch department of the power grid when the grid frequency exceeds the upper limit.To study urgent wind power curtailment at the minute-level,the most appropriate shedding method for wind generators is selected based on the frequency adjustment sensitivity index of wind generators’ tripping as lopsided power exists.Typical difficult time intervals of the frequency adjustment are chosen according to the relationship between frequency overshoot time and load variation.Combined with the above wind generator tripping strategies,annual wind power curtailment in the planning scheme at the frequency adjustment level is estimated.Based on DIgSILENT/PowerFactory software,a certain regional power network planning in China of 2020 is used to verify the correctness and validity of the proposed method.

Key words： Wind generator tripping strategy power grid frequency sensitivity analysis wind power curtailment

收稿日期: 2014-11-15 出版日期: 2015-05-25

PACS:

TM73

基金资助:国家自然科学基金(51337005),国家电网公司科技项目(SGCC-MPLG018-2012)和国家电网公司“千人计划”专项(XT71-12-028)资助项目。

通讯作者: 田书欣男,1985年生,博士研究生,研究方向为考虑风电的输电网规划。

作者简介: 田书欣男,1985年生,博士研究生,研究方向为考虑风电的输电网规划。程浩忠男,1962生,博士,教授,博士生导师,研究方向为电力系统规划、电压稳定、电能质量等。

引用本文:

田书欣, 程浩忠, 曾平良, 柳璐, 王侃, 马洲俊. 基于调频层面的风电弃风分析[J]. 电工技术学报, 2015, 30(7): 18-26. Tian Shuxin, Cheng Haozhong, Zeng Pingliang, Liu Lu, Wang Kan, Ma Zhoujun. Analysis on Wind Power Curtailment at Frequency Adjustment Level. Transactions of China Electrotechnical Society, 2015, 30(7): 18-26.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I7/18

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