摘要
采用基于时域仿真实现的复转矩系数法—测试信号法 ,研究了一个含串联电容补偿的交直流混合系统的次同步振荡问题。按频率扫描的要求 ,通过对机组施加一系列不同频率的测试信号 ,计算出了机组在次同步频率范围内的电气阻尼特性 ,并考察了直流输电功率水平对此阻尼的影响。结果表明与直流输电线路并联的串补交流线路在电气阻尼中起主导作用 ,同时串补还有可能使联接于逆变站的发电机组发生次同步振荡。
The complex torque coefficient-test signal method realized by time domain simulation is adopted in this paper to study the SSO problem for an AC/DC hybrid system with series capacitor compensation. According to the rule of frequency scanning, a series of test signals with different frequencies are added to the interested unit to calculate the electrical damping. Impacts of the DC power levels on the damping characteristics are also studied. The research results show that the series compensated AC line in parallel with the HVDC link dominates the damping characteristics of the AC/DC hybrid system, and it also causes the potential SSO danger on the unit connected to the inverter.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第2期1-3,9,共4页
High Voltage Engineering
基金
国家自然科学基金资助项目 ( 5 0 2 770 3 4)
国家重点基础研究专项经费资助项目 (G19980 2 0 3 10 )
