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考虑并网变流器调节能力的广域阻尼控制策略研究

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针对含并网变流器电力系统,提出了一种利用并网变流器来提升系统小干扰功角稳定的广域阻尼控制策略及其设计方案.基于含并网变流器电力系统的小干扰稳定模型,该方案以模态线性二次型调节器为依据设计了状态反馈控制策略,可以实现不同功角振荡模式的解耦控制.考虑到不同并网变流器具有不同的调节能力,进一步构建了以模态线性二次型调节器权重矩阵为待优化变量,以关键振荡模式的阻尼比和并网变流器调节能力作为约束的阻尼控制分配模型,并利用遗传算法进行求解.在PSAT中搭建IEEE 68节点系统模型,对所提控制方案进行验证,结果表明该控制方案能够有效利用各个并网变流器向系统提供足够的阻尼支持.
Design of wide-area damping control strategy considering the regulation capability of grid-connected converter
In this paper,a wide-area damping control strategy and corresponding design scheme is proposed such that grid-connected converters can be used to improve the small signal rotor angle stability of the system.Based on the small signal stability model of power system with grid-connected converters,the modal linear quadratic regulator (MLQR) is applied to design the state feedback control strategy,which can achieve the decoupling control of dif-ferent rotor angle oscillation modes.Considering that different grid-connected converters have different regulation capabilities,this paper further builds a damping effort allocation model,which can be solved by using the genetic algorithm (GA) .In the allocation model,the weight matrix of MLQR is regarded as the variable to be optimized,meanwhile the damping ratio of key oscillation modes and the regulation ability of grid-connected converters are used as constraints.Finally,simulation tests are carried out in the Power System Analysis Toolbox (PSAT) based on the IEEE 68 bus system,and the results show that the damping control scheme can effectively use each grid-connected converter to provide sufficient damping support to the system within their control capabilities.

regulation capability of grid-connected convertermodal linear quadratic regulatoroscillation mode decouplingwide-area damping controlgenetic algorithm

郭金鹏、张海燕、许庆、和大壮、孙晓荣、潘学萍

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河海大学电气与动力工程学院,江苏 南京211106

并网变流器调节能力 模态线性二次型调节器 振荡模式解耦 广域阻尼控制 遗传算法

中央高校基本科研业务费专项资金项目国家自然科学基金项目国家自然科学基金青年科学基金项目

B2402011215247708952407094

2024

10.12067/ATEEE2308016

电工电能新技术
中国科学院电工研究所

电工电能新技术

CSTPCD北大核心
影响因子：0.716
ISSN：1003-3076
年,卷(期)：2024.43(9)