摘要
利用中长期电压稳定时域仿真程序,计算分析有载调压变压器分接头调整对电力系统电压稳定性的影响。研究了有载调压变压器分接头的调节作用对变压器一、二次侧电压的影响与恒阻抗负荷、恒电流负荷、恒功率负荷以及电动机负荷等不同的负荷类型的关系。对于恒阻抗和恒电流型负荷,在变比上调恢复副边电压的情况下,负荷功率恢复,又使原边电压下降,可使系统功率失去平衡;而对于恒功率负荷和电动机负荷,OLTC的变化不会引起负荷功率的恢复,OLTC的变化对系统电压稳定有利;同时研究了对于一般电压敏感和具有动态恢复特性的负荷,反调分接头对电压稳定性的影响。最后提出了分接头调节的策略。
Using time domain medium-and-long term voltage stability simulation program ,the influence of the action of OLTC on voltage stability can be calculated and discussed. It is discussed that the adjusting effect of OLTC to the voltage of primary and secondary side is in close relation to the load type. For a constant impedance load or a constant current load, if regulating the secondary voltage by making the changer ratio higher, the primary voltage will get much lower while the load power is restoring, and the power will then lose balance. For a constant power load or a motor load, since the change of OLTC has no or little influence on the load power, the voltage of primary side almost has no change whether the tap operates or not. The influence on the voltage stability with respect to the dynamic restoring load which is sensitive to voltage is also discussed. Finally a tap locking or unlocking strategy is brought forward.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2006年第2期54-58,共5页
Proceedings of the CSU-EPSA
关键词
电力系统
电压稳定
电压崩溃
有载调压变压器
power system
voltage stability
voltage collapse
on-load tap changer（OLTC）
