CAJ | 학술논문

随着互联电网的联系不断增强,区域间电压、无功的弱耦合假设将不再成立.基于该假设设计的区域自动电压控制(AVC)系统如果不采取合理的协调策略,可能造成无功分布不合理,甚至控制振荡和不稳定等严重后果.基于对区域间联络线节点灵敏度关系的分析,提出了AVC系统间的一种新的协调变量--区域电压控制偏差(VACE).该协调变量能够区分出无功扰动发生在本区域还是相邻区域,并能反映出本区域对相邻区域无功影响的方向和大小.利用该协调变量作为考核指标,可以方便地实现区域AVC系统的协调,明确各区域的控制责任,明显减小区域问的相互影响.新英格兰39节点系统的算例仿真说明,考虑VACE指标后,互联区域AVC系统的控制振荡得到抑制,区域发电机无功裕度分布更加均匀合理.
수착호련전망적련계불단증강,구역간전압、무공적약우합가설장불재성립.기우해가설설계적구역자동전압공제(AVC)계통여과불채취합리적협조책략,가능조성무공분포불합리,심지공제진탕화불은정등엄중후과.기우대구역간련락선절점령민도관계적분석,제출료AVC계통간적일충신적협조변량--구역전압공제편차(VACE).해협조변량능구구분출무공우동발생재본구역환시상린구역,병능반영출본구역대상린구역무공영향적방향화대소.이용해협조변량작위고핵지표,가이방편지실현구역AVC계통적협조,명학각구역적공제책임,명현감소구역문적상호영향.신영격란39절점계통적산례방진설명,고필VACE지표후,호련구역AVC계통적공제진탕득도억제,구역발전궤무공유도분포경가균균합리.
As the intereonnection of power networks becoming increasingly meshed, the assumption of weak coupled reactive power and voltage control between areas is no longer correct. If regional control systems operate uncoordinatedly, some adverse consequences may occur, such as unreasonable reactive power distribution, control oscillation or even instability. Based on sensitivity analysis, a new coordination variable named VACE is proposed. The new coordination variable can distinguish whether a disturbance occurs inside or outside the region and indicate the magnitude and direction of reactive power exchange.Using VACE as an examination index, coordinated AVC can be implemented easily. The responsibility of control is clear and the negative effect between different AVC systems can be reduced. The simulation results of the New England System show that with VACE index under consideration, control oscillation is effectively attenuated and higher reactive power reserve is achieved.