基于轨迹灵敏度的交直流受端系统暂态电压两阶段控制  

Trajectory sensitivity based transient voltage two-stage control in AC/DC receiving end system

作　　者：王长江 李筱婧 贾春贺 王茗萱 李国庆[1] WANG Changjiang;LI Xiaojing;JIA Chunhe;WANG Mingxuan;LI Guoqing(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China;State Grid Jilin Electric Power Co.,Ltd.,Changchun 130021,China;Baishan Power Supply Company of State Grid Jilin Electric Power Co.,Ltd.,Baishan 134300,China;State Grid Changchun Power Supply Company,Changchun 130021,China)

机构地区：[1]东北电力大学现代电力系统仿真控制与绿色电能新技术教育部重点实验室,吉林吉林132012 [2]国网吉林省电力有限公司,吉林长春130021 [3]国网吉林省电力有限公司白山供电公司,吉林白山134300 [4]国网长春供电公司,吉林长春130021

出　　处：《电力自动化设备》2023年第7期124-132,共9页Electric Power Automation Equipment

基　　金：国家自然科学基金委员会-国家电网公司智能电网联合基金资助项目(U2066208);东北电力大学博士科研启动基金资助项目(BSJXM⁃2022104)。

摘　　要：针对交直流受端系统暂态电压调控能力不足的现状,提出一种基于轨迹灵敏度的交直流受端系统暂态电压两阶段控制方法。构建以最优无功补偿容量和紧急控制成本最小为目标函数的两阶段暂态电压控制模型。借助摄动法求取暂态电压稳定裕度对控制量的轨迹灵敏度,将非线性暂态电压控制模型转化为二次规划模型来提高暂态电压控制效率。为避免故障期间交直流受端系统暂态电压的大幅跌落,实施静止同步补偿器和新一代调相机协同的预防控制,充分发挥无功补偿装置在暂态电压不同跌落程度下的动态无功支撑优势。针对实施暂态电压预防控制后恢复阶段的低电压延时恢复问题,实施包含基于电压源换流器的高压直流和传统调压措施的紧急控制来加快暂态电压恢复速度。修改后的IEEE 39节点系统和实际系统算例结果验证了所提暂态电压控制方法的准确性和有效性。Aiming at the situation of insufficient transient voltage regulation ability in AC/DC receiving end system,a transient voltage two-stage control method based on trajectory sensitivity is proposed for AC/DC receiving end system.A two-stage transient voltage control model is constructed with the optimal reactive power compensation capacity and minimum emergency control cost as the objective functions.The perturba⁃tion method is used to obtain the trajectory sensitivity of transient voltage stability margin to control quantity,and the nonlinear transient voltage control model is transformed into a quadratic programming model,which improves the efficiency of transient voltage control.In order to avoid serious transient voltage sag of AC/DC receiving end system during the fault period,the prevention control coordinating with static syn⁃chronous compensator and new generation synchronous condenser is implemented,which fully exploits the dynamic reactive power supporting advantage of the reactive power compensation devices under different transient voltage sag degrees.Aiming at the low voltage delay recovery problem in the recovery stage after implementing the transient voltage preventive control,the emergency control containing voltage source con⁃verter based high voltage direct current(VSC-HVDC)and the traditional voltage regulation measures is im⁃plemented to accelerate the transient voltage recovery speed.The accuracy and effectiveness of the proposed transient voltage control method are verified by the simulative results of the modified IEEE 39-bus system and an actual system.

关 键 词：暂态电压控制 基于电压源换流器的高压直流 预防控制 紧急控制 轨迹灵敏度 

分 类 号：TM712[电气工程—电力系统及自动化]