摘要
配置调速侧电力系统稳定器(GPSS)是汽轮机侧抑制电网低频振荡的有效方法,现有研究多以单一阻尼指标提出GPSS优化策略,未考虑GPSS与调速系统固有参数耦合作用对机组一次调频性能造成的影响。选取与低频振荡强相关的状态变量,兼顾状态变量输出误差与最终稳态误差构建动态稳定性指标,以GPSS安装前后阶跃扰动下一次调频上升曲线各时间响应差值加权和构建调频特性指标,区别于将多指标通过人工赋权整合为单目标优化的主观性,使用基于非支配排序思想的带精英策略的非支配排序遗传(NSGA-Ⅱ)算法将具有博弈关系的阻尼指标和调频特性指标权衡考虑。并采取基于理想均衡点的兼容解法从Pareto解集中得到最佳兼容方案,在一次调频考核允许范围内将机组振荡曲线平息时间缩短了4.936 s,使得系统的综合性能更加合理。
Configuring governor side power system stabilizer(GPSS) on turbine side is an effective method to suppress low-frequency oscillation of power grid.Most of the existing studies put forward GPSS optimization strategy based on a single damping index,without considering the effect of the coupling between GPSS and the inherent parameters of the speed regulating system on the primary frequency regulation performance of the unit.The state variables strongly related to low-frequency oscillations are selected to construct dynamic stability index by considering the output error of state variables and the final steady-state error.The weighted sum of the time response difference of the step disturbance primary frequency modulation rising curve before and after GPSS installation is used as the primary frequency regulation characteristic index.Different from integrating the multitarget by artificial empowerment for single objective optimization of subjectivity,the NSGA-Ⅱ algorithm based on non-dominated ordering idea is used to balance the damping index and frequency modulation characteristic index with game relationship,and the compatible solution method based on ideal equilibrium point is used to select the best compatible solution from Pareto solution set.The cooling time of unit oscillation curve is shortened by 4.936s and make the comprehensive performance of the system more reasonable.
作者
冯鼎元
康英伟
FENG Dingyuan;KANG Yingwei(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)
出处
《热力发电》
CAS
CSCD
北大核心
2022年第6期102-110,共9页
Thermal Power Generation
基金
国家自然科学基金项目(61573239)
上海发电过程智能管控工程技术研究中心资助项目(14DZ2251100)。
关键词
调速侧电力系统稳定器
低频振荡
一次调频
NSGA-Ⅱ
优化设计
governor side power system stabilizer
low frequency oscillation
primary frequency regulation
NSGA-Ⅱ
optimization design
