四川电力技术
四川電力技術
사천전력기술
SICHUAN ELECTRIC POWER TECHNOLOGY
2014年
1期
29-32
,共4页
电压稳定%L指标%无功注入量%无功优化%快速计算
電壓穩定%L指標%無功註入量%無功優化%快速計算
전압은정%L지표%무공주입량%무공우화%쾌속계산
voltage stability%L index%injected reactive power%reactive power optimization%fast calculation
随着电网负荷的不断增加，电压稳定性问题日益突出，电网出现电压失稳的可能性也越来越大。为了改善系统电压稳定性，以电压稳定在线监控的简化L指标为基础，分析了无功注入量的变化对电压稳定的影响；根据简化L指标函数的微分基本性质，推导出了一种关于无功优化通用的、规范的解析算法。该方法能快速地计算负荷节点无功注入量，使得电网运行在带相应负荷的最佳稳定状态。通过IEEE-14、IEEE-30、IEEE-57、IEEE-118系统的算例仿真，验证了所述方法对于提高电压稳定性，降低电网崩溃风险的可行性和有效性。
隨著電網負荷的不斷增加，電壓穩定性問題日益突齣，電網齣現電壓失穩的可能性也越來越大。為瞭改善繫統電壓穩定性，以電壓穩定在線鑑控的簡化L指標為基礎，分析瞭無功註入量的變化對電壓穩定的影響；根據簡化L指標函數的微分基本性質，推導齣瞭一種關于無功優化通用的、規範的解析算法。該方法能快速地計算負荷節點無功註入量，使得電網運行在帶相應負荷的最佳穩定狀態。通過IEEE-14、IEEE-30、IEEE-57、IEEE-118繫統的算例倣真，驗證瞭所述方法對于提高電壓穩定性，降低電網崩潰風險的可行性和有效性。
수착전망부하적불단증가，전압은정성문제일익돌출，전망출현전압실은적가능성야월래월대。위료개선계통전압은정성，이전압은정재선감공적간화L지표위기출，분석료무공주입량적변화대전압은정적영향；근거간화L지표함수적미분기본성질，추도출료일충관우무공우화통용적、규범적해석산법。해방법능쾌속지계산부하절점무공주입량，사득전망운행재대상응부하적최가은정상태。통과IEEE-14、IEEE-30、IEEE-57、IEEE-118계통적산례방진，험증료소술방법대우제고전압은정성，강저전망붕궤풍험적가행성화유효성。
With the improvement of grid load , the problem of grid voltage stability is increasingly prominent , which increases the possibility of voltage instability .In order to improve the system voltage stability in a timely and effective manner , the influ-ences of different injected reactive power on voltage stability are analyzed based on the simplified L index in online monitoring of voltage stability , and a general , canonical and analytical algorithm to optimize VAR is deduced according to the differential property of simplified function of L index.By the proposed approach , the injected reactive power of node can be calculated quickly so that the grid operation can be in the optimal steady state with the corresponding load .The simulations with IEEE-14, IEEE-30, IEEE-57 and IEEE-118 systems have verified the feasibility and validity of the proposed method to improve the voltage stability and reduce the risk of grid collapse .
