摘要
针对串补输电工程的多模态次同步谐振(SSR),阐述了附加励磁阻尼控制器(SEDC)和机端次同步阻尼控制器(GTSDC)抑制SSR的机理。充分考虑了系统的各种运行工况、故障和设备容量,将参数优化设计问题规范为一个约束型非线性规划问题,进而采用遗传—模拟退火(GASA)算法求解得到一组最优的控制参数。以上都电厂三期为例采用特征值分析和时域仿真对比SEDC和GTSDC是否加入对系统低频振荡的抑制效果,验证参数优化的有效性。结果表明:通过参数优化后能够提高系统的扭振阻尼,能有效抑制多模态SSR,从而保证了机组和电网的安全稳定运行。
In this paper, supplementary excitation damping control （SEDC） and generator terminal subsynchronous damping control （GTSDC） are designed in a coordinated way to solve the multimodal subsynchronous resonance （SSR） problem in series-compensated transmission systems. Firstly, the basic principle of the combined SEDC and GTSDC scheme for SSR mitigation is explained. Then the task of tuning control parameters of SEDC and GTSDC simultaneously is formulated into a constrained nonlinear optimization problem, in which different operating conditions/disturbances and equipment capacity are fully considered. Next the genetic algorithm and simulated annealing （GASA） is implemented to solve the problem and the optimal parameters are obtained. Finally, based on a practical system, i.e., the Shangdu series-compensated system, the effectiveness of the coordinated controllers is verified using both eigenvalue analysis and electromagnetic simulation. The results have demonstrated that the proposed method is effective and the optimized control parameters can greatly improve the damping of the three torsional modes. Thus multimodal SSR can be depressed effectively, ensuring the stability of the system and the safety of the generator shafts.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第20期83-88,共6页
Power System Protection and Control
基金
国家自然科学基金项目(51077080)
电力系统国家重点实验室资助项目(SKLD11M02)~~
关键词
次同步振荡
附加励磁控制器
机端次同步阻尼控制器
遗传退火算法
sub-synchronous resonance （SSR）
supplementary excitation damping controller （SEDC）
generator terminalsub-synchronous damping controller （GTSDC）
genetic algorithm and simulated annealing （GASA）
