摘要
有载调压变压器被认为是造成电压崩溃的重要因素之一。对国内外有载调压变压器对电压稳定性的影响研究作了概述。从延时上对OLTC进行了分类,介绍了用于机理分析的等值模型,运用P-V和P-G曲线解释了其影响机理,强调OLTC动态对电压稳定带来不利影响的同时也扩大了传输功率极限。分析了调节步长、电压死区、延时等OLTC参数对电压稳定的影响,恒阻抗、恒功率、恒电流和电动机负荷模型下的影响差异,使得自动调节特性变坏的各种运行控制措施。并对今后的研究提出了建议。
On-load tap changer （OLTC） is considered to be one of the important factors that results in voltage collapse. In this paper, studies on the OLTC effect in voltage stability both at home and abroad are summarized. The OLTCS are classified by time delay. The equivalent model for mechanism analysis is introduced. The mechanism of its impact is explained using P-V and P-G curves. It is stressed that OLTC dynamic in voltage stability not only brings the adverse effect but also expands the power transmission limit at the same time. This paper .analyses the impact of OLTC parameters such as adjustment steps, bandwidth, time delay on voltage stability, the different impact of constant impedance, constant power, constant current and electric motor load model, the various operational control measures that deteriorate automatic adjustment. And suggestions for the future research are provided.
出处
《继电器》
CSCD
北大核心
2008年第11期79-84,共6页
Relay
关键词
电压稳定
有载调压变压器
电压崩溃
机理
voltage stability
on-load tap changer （OLTC）
voltage collapse
mechanism
