电力系统及其自动化学报
電力繫統及其自動化學報
전력계통급기자동화학보
PROCEEDINGS OF THE CHINESE SOCIETY OF UNIVERSITIES
2009年
6期
6-10
,共5页
贺洋%李兴源%唐长春%吴华坚
賀洋%李興源%唐長春%吳華堅
하양%리흥원%당장춘%오화견
混合电力系统%暂念稳定%故障临界切除时间%最优变目标控制
混閤電力繫統%暫唸穩定%故障臨界切除時間%最優變目標控製
혼합전력계통%잠념은정%고장림계절제시간%최우변목표공제
hybrid system%transient stability%critical fault clearing time%optimal variable aim control
采用故障临界切除时间为指标,对交直流混合系统的送端进行了暂态稳定性分析,并提出采用最优变目标的控制策略来提高其暂态稳定性.这种控制策略考虑了直流控制与其送端临近发电机励磁控制的协调,即首先将系统驱动到按最大稳定域选样的人工中间平衡点.然后再驱动系统到所希望的平衡点.通过NETOMAC对一个典型交直流并联系统进行数字仿真,结果表明这种控制可以较大增加故障临界切除时间,提高交直流互联系统的暂态稳定性.
採用故障臨界切除時間為指標,對交直流混閤繫統的送耑進行瞭暫態穩定性分析,併提齣採用最優變目標的控製策略來提高其暫態穩定性.這種控製策略攷慮瞭直流控製與其送耑臨近髮電機勵磁控製的協調,即首先將繫統驅動到按最大穩定域選樣的人工中間平衡點.然後再驅動繫統到所希望的平衡點.通過NETOMAC對一箇典型交直流併聯繫統進行數字倣真,結果錶明這種控製可以較大增加故障臨界切除時間,提高交直流互聯繫統的暫態穩定性.
채용고장림계절제시간위지표,대교직류혼합계통적송단진행료잠태은정성분석,병제출채용최우변목표적공제책략래제고기잠태은정성.저충공제책략고필료직류공제여기송단림근발전궤려자공제적협조,즉수선장계통구동도안최대은정역선양적인공중간평형점.연후재구동계통도소희망적평형점.통과NETOMAC대일개전형교직류병련계통진행수자방진,결과표명저충공제가이교대증가고장림계절제시간,제고교직류호련계통적잠태은정성.
Some analysis focusing on the transient stability at the sending end of AC/DC hybrid system taking critical fault clearing time (t_(cr)) as the inductoris are made and an Optimal Variable Aim Control (OVAC) strategy is proposed to improve its transient stability. This strategy considers coordinated between HVDC and its nearby generator excitation control, which drives the system to artificial media equilibrium at first, and then the promising equilibrium. The simulation results of NETOMAC on a typical AC/DC parallel model show the proposed comtrol strategy can increase t_(cr) and improve AC/DC hybrid system's transient stability.
