SSSC提高系统阻尼特性的控制策略优化设计

发布时间：2018-03-31 06:36

本文选题：SSSC　切入点：阻尼特性　出处：《电网技术》2017年03期

【摘要】：分析了含静止同步串联补偿器(static synchronous series compensator,SSSC)电网的次同步振荡数学机理,基于单机无穷大系统推导了考虑SSSC暂态特性的改进系统模型,提出了将调度和本地测量信号作为输入来提高系统阻尼特性的控制策略。利用复转矩分析法的测试原理提出了新型阻尼控制器参数的设计方案,通过合理设计参数可提高系统阻尼及系统稳定性。分析系统的控制目标函数和约束条件,提出了结合遗传算法的参数优化方案,该方法将阻尼控制器参数的协调优化问题转化为阻尼比的最优定值,结合算法得到了提高系统阻尼的控制参数。PSCAD/EMTDC仿真表明,此时系统阻尼值为正,阻尼控制器增大了系统阻尼比,实验结果证明了控制策略对提高系统稳定性的有效性。
[Abstract]:The mathematical mechanism of subsynchronous oscillation in static synchronous series compensator (SSSC) power network with static synchronous series compensator is analyzed. An improved system model considering the transient characteristics of SSSC is derived based on a single machine infinite bus system. A control strategy is proposed to improve the damping characteristics of the system by using the dispatching and local measurement signals as inputs. The design scheme of the parameters of the new damping controller is proposed by using the test principle of complex torque analysis method. The system damping and system stability can be improved by reasonably designing parameters. After analyzing the control objective function and constraint conditions of the system, a parameter optimization scheme combined with genetic algorithm is proposed. In this method, the coordinated optimization of damping controller parameters is transformed into the optimal damping ratio, and the control parameters. PSCAD / EMTDC simulation results show that the damping value of the system is positive. The damping controller increases the damping ratio of the system. The experimental results show that the control strategy is effective to improve the stability of the system.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);先进输电技术国家重点实验室(全球能源互联网研究院);国家电网天津市电力公司;
【基金】：国家电网公司科技项目(SGRI-DL-71-15-004)~~
【分类号】：TM712

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