电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2012年
1期
85-89
,共5页
王官宏%李莹%李文锋%陶向宇%牛栓保%常喜强%赵红光
王官宏%李瑩%李文鋒%陶嚮宇%牛栓保%常喜彊%趙紅光
왕관굉%리형%리문봉%도향우%우전보%상희강%조홍광
新疆西北联网工程%稳定计算%参数优化%扰动试验%电力系统
新疆西北聯網工程%穩定計算%參數優化%擾動試驗%電力繫統
신강서북련망공정%은정계산%삼수우화%우동시험%전력계통
project of interconnecting Xinjiang power gridwith Northwest China power grid%stability calculation%parameter optimization%field disturbance test%power system
新疆电网以750kV电压等级线路接入西北主网后，互联电网的动态特性、振荡模式发生了变化，新增了一个新疆电网对西北主网的区域间振荡模式。新疆内部和西北主网内部主要断面的动态稳定水平没有下降，新疆电网内部局部地区仍存在弱阻尼振荡模式。通过协调优化新疆电网内部北疆西部地区部分机组的励磁系统自动电压调节器（automaticvoltageregulator，AVR）和电力系统稳定器fpowersystemstabilizer，PSS）参数，可提高系统的阻尼水平，并在一定程度上解决了该地区水电窝电现象。开展了实际互联电网系统扰动试验，实测数据验证了仿真计算结果的准确性，通过扰动试验掌握了互联电网的动态特性和系统阻尼水平。研究综合运用了时域和频域的方法，并以频率计算为主，辅以时域分析校验。
新疆電網以750kV電壓等級線路接入西北主網後，互聯電網的動態特性、振盪模式髮生瞭變化，新增瞭一箇新疆電網對西北主網的區域間振盪模式。新疆內部和西北主網內部主要斷麵的動態穩定水平沒有下降，新疆電網內部跼部地區仍存在弱阻尼振盪模式。通過協調優化新疆電網內部北疆西部地區部分機組的勵磁繫統自動電壓調節器（automaticvoltageregulator，AVR）和電力繫統穩定器fpowersystemstabilizer，PSS）參數，可提高繫統的阻尼水平，併在一定程度上解決瞭該地區水電窩電現象。開展瞭實際互聯電網繫統擾動試驗，實測數據驗證瞭倣真計算結果的準確性，通過擾動試驗掌握瞭互聯電網的動態特性和繫統阻尼水平。研究綜閤運用瞭時域和頻域的方法，併以頻率計算為主，輔以時域分析校驗。
신강전망이750kV전압등급선로접입서북주망후，호련전망적동태특성、진탕모식발생료변화，신증료일개신강전망대서북주망적구역간진탕모식。신강내부화서북주망내부주요단면적동태은정수평몰유하강，신강전망내부국부지구잉존재약조니진탕모식。통과협조우화신강전망내부북강서부지구부분궤조적려자계통자동전압조절기（automaticvoltageregulator，AVR）화전력계통은정기fpowersystemstabilizer，PSS）삼수，가제고계통적조니수평，병재일정정도상해결료해지구수전와전현상。개전료실제호련전망계통우동시험，실측수거험증료방진계산결과적준학성，통과우동시험장악료호련전망적동태특성화계통조니수평。연구종합운용료시역화빈역적방법，병이빈솔계산위주，보이시역분석교험。
After the interconnection of Xinjiang power grid with Northwest China power grid by 750kV transmission line, dynamic characteristics and oscillation modes of the interconnected power grid are varied, and a new inter-area oscillation mode between Xinjiang power grid and Northwest China power grid appears. Dynamic stability level of the main tie line inside Xinjiang power grid and that inside Northwest China power grid are maintained, however, the oscillation mode with weak damping still exists in the northwest part of Xinjiang power grid. By means of coodinative optimization of AVR paramters and PSS parameters of partial units in West Xinjiang region the damping level of Xinjiang power grid can be improved, and the problem that it is hard to outwards transmit hydropower generated in North Xinjiang is solved to a certain extent. Field system disturbance tests of the interconnected power grid are performed, and the accuracy of simulation results are verified by measured data of actual system disturbance tests. Through disturbance tests, both dynamic characteristics and system damping level of interconnected power grid are mastered. In this research the time-domain method and frequency-domain method are synthetically utilized and the frequency-domain method is taken as the principal, and the time-domain analysis is used for the verification.
