河海大学学报(自然科学版)
河海大學學報(自然科學版)
하해대학학보(자연과학판)
JOURNAL OF HOHAI UNIVERSITY (NATURAL SCIENCES)
2014年
2期
159-164
,共6页
周建旭%邵卫红%黄笑同%朱飞
週建旭%邵衛紅%黃笑同%硃飛
주건욱%소위홍%황소동%주비
引水式水电站%并联调压室%稳定性%小波动%弹性模型
引水式水電站%併聯調壓室%穩定性%小波動%彈性模型
인수식수전참%병련조압실%은정성%소파동%탄성모형
water diversion-type hydropower station%parallel surge chambers%stability%small fluctuation%elastic model
为保证水电站机组的稳定运行和供电质量,对设置并联调压室的长引水式水电站建立了准确的数学模型,以全面模拟水力-机械系统的动态特性,开展系统的小波动稳定性分析;基于压力管道内水体刚性模型和弹性模型,分别建立了描述水力-机械系统动态特性的分析模型,综合频域和时域分析,研究了不同的输水系统布置形式和压力管道内水体采用不同阶数弹性模型对系统稳定性分析的影响。算例分析表明,考虑到传统刚性模型的应用局限性,长引水式水电站压力管道内水体应采用三阶或三阶以上的弹性模型,以全面揭示系统的振动特性和稳定性能。
為保證水電站機組的穩定運行和供電質量,對設置併聯調壓室的長引水式水電站建立瞭準確的數學模型,以全麵模擬水力-機械繫統的動態特性,開展繫統的小波動穩定性分析;基于壓力管道內水體剛性模型和彈性模型,分彆建立瞭描述水力-機械繫統動態特性的分析模型,綜閤頻域和時域分析,研究瞭不同的輸水繫統佈置形式和壓力管道內水體採用不同階數彈性模型對繫統穩定性分析的影響。算例分析錶明,攷慮到傳統剛性模型的應用跼限性,長引水式水電站壓力管道內水體應採用三階或三階以上的彈性模型,以全麵揭示繫統的振動特性和穩定性能。
위보증수전참궤조적은정운행화공전질량,대설치병련조압실적장인수식수전참건립료준학적수학모형,이전면모의수력-궤계계통적동태특성,개전계통적소파동은정성분석;기우압력관도내수체강성모형화탄성모형,분별건립료묘술수력-궤계계통동태특성적분석모형,종합빈역화시역분석,연구료불동적수수계통포치형식화압력관도내수체채용불동계수탄성모형대계통은정성분석적영향。산례분석표명,고필도전통강성모형적응용국한성,장인수식수전참압력관도내수체응채용삼계혹삼계이상적탄성모형,이전면게시계통적진동특성화은정성능。
To guarantee stable operation and power quality in the turbine units of a hydropower station, an exact mathematical model was built for a long-distance water diversion-type hydropower station with parallel surge chambers. The dynamic characteristics of the hydro-mechanical system were comprehensively simulated, and stability analysis of small fluctuations in the system was conducted. Based on the rigid model and elastic model for the pipe flow, analysis models were established to describe the dynamic characteristics of the hydro-mechanical system. Combined with numerical analysis of both frequency and the time domain, the effects of different layouts of the water diversion system and elastic models with different orders for the pipe flow on the system's stability analysis were investigated. An example shows that, instead of the commonly used rigid model, which has application limitations, a three-order or higher-order elastic model should be used for the pipe flow at the long-distance water diversion-type hydropower station to fully demonstrate the system's vibration characteristics and stability performance.