电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2015年
1期
288-293
,共6页
张志强%徐友平%袁荣湘%唐晓骏%徐遐龄%秦晓辉%吴丽华
張誌彊%徐友平%袁榮湘%唐曉駿%徐遐齡%秦曉輝%吳麗華
장지강%서우평%원영상%당효준%서하령%진효휘%오려화
区域电网%频率特性%高频切机
區域電網%頻率特性%高頻切機
구역전망%빈솔특성%고빈절궤
regional power grid%frequency characteristic%over-frequency generator tripping
目前,我国已经形成华北—华中特高压交流联网格局,联网初期有必要研究特高压联络线解列后,2个区域电网的频率稳定性。以华中(含川渝)电网调度数据为基础,通过推导大型互联区域电网频率偏差的解析式,把握了频率变化过程中最高频率和稳态频率特性;在以上工作基础上,再通过构建华中电网的等值单机带负荷模型,研究华中电网高频切机的最佳频段、最少切机量和切机各轮次的较优比例。最终,提出了适合于华中电网的高频切机方案,并验证了其适应性。
目前,我國已經形成華北—華中特高壓交流聯網格跼,聯網初期有必要研究特高壓聯絡線解列後,2箇區域電網的頻率穩定性。以華中(含川渝)電網調度數據為基礎,通過推導大型互聯區域電網頻率偏差的解析式,把握瞭頻率變化過程中最高頻率和穩態頻率特性;在以上工作基礎上,再通過構建華中電網的等值單機帶負荷模型,研究華中電網高頻切機的最佳頻段、最少切機量和切機各輪次的較優比例。最終,提齣瞭適閤于華中電網的高頻切機方案,併驗證瞭其適應性。
목전,아국이경형성화북—화중특고압교류련망격국,련망초기유필요연구특고압련락선해렬후,2개구역전망적빈솔은정성。이화중(함천투)전망조도수거위기출,통과추도대형호련구역전망빈솔편차적해석식,파악료빈솔변화과정중최고빈솔화은태빈솔특성;재이상공작기출상,재통과구건화중전망적등치단궤대부하모형,연구화중전망고빈절궤적최가빈단、최소절궤량화절궤각륜차적교우비례。최종,제출료괄합우화중전망적고빈절궤방안,병험증료기괄응성。
At present an ultra high voltage (UHV) AC interconnected structure composed of North China power grid with Central China power grid has been formed, and at the beginning stage of the interconnection it is necessary to research the frequency stabilities of North China power grid and Central China power grid after the splitting of the interconnected power grid via the UHV tie line. Based on the dispatching data of Central China power grid, which includes the dispatching data of Sichuan power grid and Chongqing power grid, the analytic expressions of the frequency deviation of large-scale interconnected regional power grid are derived to grasp the highest frequency and the steady state frequency characteristics during the frequency variation; on this basis, by means of constructing equivalent loaded single machine model of Central China power grid the optimal frequency band, the least capacity of the tripped generators and the more appropriate proportions for different tripping rounds during the over-frequency generator tripping in Central China power grid are researched. Finally, an over-frequency generator-tripping scheme suitable for Central China power grid is proposed, and its adaptability is validated by simulation results.