电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
3期
149-155
,共7页
功率不平衡%低频减载%低压减载%频率稳定%电压稳定%紧急控制
功率不平衡%低頻減載%低壓減載%頻率穩定%電壓穩定%緊急控製
공솔불평형%저빈감재%저압감재%빈솔은정%전압은정%긴급공제
power imbalance%under frequency load shedding(UFLS)%under voltage load shedding(UVLS)%frequency stability%voltage stability%emergency control
紧急控制中的低频减载和低压减载策略作为第三道防线的重要内容,已经在电力系统中广泛加以采用,对防止系统稳定破坏具有重要意义.在分析和总结国内外低频减载和低压减载方面主要研究工作的基础上,归纳了目前切负荷方案的优缺点,着重指出系统受到大的扰动时,电压稳定和频率稳定均受到威胁,仅考虑频率或电压单一变量的切负荷策略是不可靠的.因此,新提出的紧急减负荷策略还需要考虑系统网络拓扑的变化,以及频率稳定和电压稳定的相互影响,以实现切负荷的动态自适应性.
緊急控製中的低頻減載和低壓減載策略作為第三道防線的重要內容,已經在電力繫統中廣汎加以採用,對防止繫統穩定破壞具有重要意義.在分析和總結國內外低頻減載和低壓減載方麵主要研究工作的基礎上,歸納瞭目前切負荷方案的優缺點,著重指齣繫統受到大的擾動時,電壓穩定和頻率穩定均受到威脅,僅攷慮頻率或電壓單一變量的切負荷策略是不可靠的.因此,新提齣的緊急減負荷策略還需要攷慮繫統網絡拓撲的變化,以及頻率穩定和電壓穩定的相互影響,以實現切負荷的動態自適應性.
긴급공제중적저빈감재화저압감재책략작위제삼도방선적중요내용,이경재전력계통중엄범가이채용,대방지계통은정파배구유중요의의.재분석화총결국내외저빈감재화저압감재방면주요연구공작적기출상,귀납료목전절부하방안적우결점,착중지출계통수도대적우동시,전압은정화빈솔은정균수도위협,부고필빈솔혹전압단일변량적절부하책략시불가고적.인차,신제출적긴급감부하책략환수요고필계통망락탁복적변화,이급빈솔은정화전압은정적상호영향,이실현절부하적동태자괄응성.
Under frequency load shedding and under-voltage load shedding, as the effective emergency control strategies in the third defense line of power system, are widely used and play significant roles in preventing power system from being unstable. Based on the analysis of the main research on load shedding at home and abroad, the advantages and disadvantages of the current load shedding schemes are introduced. When power system comes across a severe disturbance, its frequency and voltage stability will be threatened simultaneously. It is not reliable just taking a single factor, namely the frequency or voltage, into consideration. The new schemes should take power system’s topology change into account and consider the interaction between the frequency and voltage stability. Therefore, the dynamic and adaptive feature of load shedding schemes will be realized.
