CAJ | 학술논문

我国火电基地采用串补技术向负荷中心送电已被验证存在次同步谐振（SSR）问题。为此建立了励磁系统功率单元的时域仿真模型和频域模型，在此基础上分析附加励磁阻尼控制器（SEDC）对功率单元控制模式的要求。通过对功率单元的特性分析、频率特性分析和时域仿真，量化分析励磁系统整流电路触发控制模式对SEDC性能的影响，得到要有效实现SEDC对次同步谐振的阻尼效果，必须要求励磁功率单元采用分相触发模式的结论。
아국화전기지채용천보기술향부하중심송전이피험증존재차동보해진（SSR）문제。위차건립료려자계통공솔단원적시역방진모형화빈역모형，재차기출상분석부가려자조니공제기（SEDC）대공솔단원공제모식적요구。통과대공솔단원적특성분석、빈솔특성분석화시역방진，양화분석려자계통정류전로촉발공제모식대SEDC성능적영향，득도요유효실현SEDC대차동보해진적조니효과，필수요구려자공솔단원채용분상촉발모식적결론。
It is already proved that there is subsynchrous resonance (SSR) during power transmission from cal-fired power plants using series compensation to the load center. Therefore , the time-domain simulation model and frequency-domain model for power unit of excitation system are built , on the basis of which the require-ments of the supplementary excitation damping controller (SEDC) on control mode of power unit are analyzed. By analysis of power unit characteristic, frequency characteristic and time-domain simulation, the paper con-ducts quantitative analysis of the impact of trigger control mode of rectifying circuit on SEDC. It is concluded that phase control mode must be adopted on excitation power unit in order that damping on SSR can be real-ized.