摘要
一些地区直驱风机风电场的高压侧出现持续的次同步振荡现象,引起临近火电机组的扭振保护动作,导致解裂事故的发生。为了对这种问题进行深入研究,本文建立了直驱风机风电场和火电机组打捆外送的等值模型。利用电磁暂态仿真研究直驱风电机组对高压侧火电机组的影响,通过改变直驱风机的两个重要影响因子(风速和风机台数),观察其对火电机组次同步振荡的影响。研究结果表明,风火打捆外送中直驱风电机组的风速和风机台数对高压侧火电机组次同步振荡现象有影响,主要体现在风速较大和较小,且风机台数较多时,火电机组次同步振荡时的电压和相关转矩发生了显著变化。
In recent years, there have been continuous subsynchronous oscillations on the high - pressure side of the direct - driventurbine wind farms in some regions of China, which causes the torsional vibration protection action in the adjacent thermal power units and thus leads to the occurrence of the cracking accident. In order to have a dee- per study on this kind of problem, in this paper, the equivalent models of direct - driventurbine wind farm and bun- dled transmission of thermal power unitsare established. The effects of direct - driven wind turbines on the high - pressure side thermal power units are used by means of electromagnetic transient simulation and two important influ- encing factors of the speed and number of the direct - drivenwind turbineare changed, in ways to observe the influ- ence of turbine on sub - synchronous oscillations of thermal power units. The results show that the wind speed and the number of turbine of direct - driven wind turbines in the wind - thermal - bundled transmission are affected by subsynchronous oscillation of high - pressure side thermal power units. It is mainly demonstrated in the area where the voltage and related torque for subsynchronous oscillations ofthermal power units has undergone significant changes , when wind speed is larger or smaller and the number of turbinesincreases.
出处
《黑龙江电力》
CAS
2017年第5期402-406,410,共6页
Heilongjiang Electric Power
关键词
风火打捆
直驱风机
火电机组
次同步振荡
影响
风速
风机台数
wind - fire bundle
direct - drivenwind turbine
thermal power unit
subsynchronous oscillation
influ- ence
wind speed
turbine number
