电测与仪表
電測與儀錶
전측여의표
Electrical Measurement & Instrumentation
2015年
20期
113-119
,共7页
有载调压变压器%电压稳定%分岔理论%单机无穷大系统
有載調壓變壓器%電壓穩定%分岔理論%單機無窮大繫統
유재조압변압기%전압은정%분차이론%단궤무궁대계통
on-load tap changer%voltage stability%bifurcation theory%single machine infinite bus power system
为研究含有载调压变压器电力系统的电压稳定问题,文章基于分岔理论分析了含有载调压变压器单机无穷大系统负荷变化对电压稳定的影响,讨论了有载调压变压器在维持系统电压稳定中的作用及其调压策略中闭锁、延时以及等值电抗对系统电压稳定的影响. 结果表明:在系统接近电压崩溃极限时,闭锁有载调压变压器分接头能使负荷节点电压维持在较低水平,有助于避免系统电压崩溃;较短的延时虽不能避免电压崩溃的发生,但有效延缓了电压崩溃的发生速度;较小的等值电抗会使系统电压受到较为明显的干扰.
為研究含有載調壓變壓器電力繫統的電壓穩定問題,文章基于分岔理論分析瞭含有載調壓變壓器單機無窮大繫統負荷變化對電壓穩定的影響,討論瞭有載調壓變壓器在維持繫統電壓穩定中的作用及其調壓策略中閉鎖、延時以及等值電抗對繫統電壓穩定的影響. 結果錶明:在繫統接近電壓崩潰極限時,閉鎖有載調壓變壓器分接頭能使負荷節點電壓維持在較低水平,有助于避免繫統電壓崩潰;較短的延時雖不能避免電壓崩潰的髮生,但有效延緩瞭電壓崩潰的髮生速度;較小的等值電抗會使繫統電壓受到較為明顯的榦擾.
위연구함유재조압변압기전력계통적전압은정문제,문장기우분차이론분석료함유재조압변압기단궤무궁대계통부하변화대전압은정적영향,토론료유재조압변압기재유지계통전압은정중적작용급기조압책략중폐쇄、연시이급등치전항대계통전압은정적영향. 결과표명:재계통접근전압붕궤겁한시,폐쇄유재조압변압기분접두능사부하절점전압유지재교저수평,유조우피면계통전압붕궤;교단적연시수불능피면전압붕궤적발생,단유효연완료전압붕궤적발생속도;교소적등치전항회사계통전압수도교위명현적간우.
In order to research the voltage stability of power system including OLTC, this paper, based on the bifurca-tion theory, analyses the influence of load on voltage stability in single machine infinite bus power system including OLTC.Then, the function of OLTC in sustaining the system voltage stability and the influence of locking and delaying in the regulation strategy and the equivalent reactance on system voltage stability are discussed.The results show that when the system is close to the limit of voltage collapse, locking the tap of OLTC can sustain the voltage of load node at a relatively low level, which is conductive to avoid the system voltage collapse.And a short delay is effective in de-laying the speed of voltage collapse.A smaller equivalent reactance will lead to a more obvious interference received by the system voltage.
