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METHOD AND SYSTEM FOR SUPPRESSING SUBSYNCHRONOUS OSCILLATION OF THERMAL POWER UNIT

机译：抑制热力机组次同步振荡的方法和系统

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摘要

A method and system for suppressing subsynchronous oscillation of a thermal power unit. The method comprises: taking a generator rotating speed deviation signal ∆ω as an input signal of a subsynchronous resonance damping controller (SSRDC), ∆ω comprising information of generator unit shafting torsional oscillation mode components; controlling the SSRDC to obtain, according to ∆ω, a trigger angle increment ∆α of a static var compensator (SVC), so as to regulate electromagnetic torque increments ∆T_e corresponding to multiple shafting torsional oscillation frequencies output by a generator unit; and controlling the SVC so that ∆T_e corresponding to the multiple shafting torsional oscillation frequencies has the same phase as ∆ω (1020), thereby suppressing subsynchronous oscillation of the generator unit. In the case that shafting torsional oscillation of the generator unit is detected by means of a supplementary excitation damping controller (SEDC), performing phase-shifting and amplification on a detected shafting torsional oscillation signal by means of the SEDC, and superimposing the shafting torsional oscillation signal subjected to phase-shifting and amplification on a control signal of an excitation regulator of the generator unit, thereby suppressing subsynchronous oscillation of the generator unit.

机译：一种用于抑制火力单元的次同步振荡的方法和系统。该方法包括：将发电机转速偏差信号Δω作为次同步共振阻尼控制器（SSRDC）的输入信号，Δω包括发电机单元轴系扭转振荡模式分量的信息;控制SSRDC根据Δω获得静态无功补偿器（SVC）的触发角增量Δα，从而调节与多个轴系扭转振荡频率相对应的电磁扭矩增量ΔT_{e 发电机单元输出;然后，通过控制SVC，使与多个轴系扭转振动频率对应的ΔT_{e 与Δω（1020）具有相同的相位，从而抑制发电机单元的次同步振动。在通过辅助励磁阻尼控制器（SEDC）检测到发电机单元的轴系扭转振动的情况下，通过SEDC对检测到的轴系扭转振动信号进行相移和放大，并叠加轴系扭转振动在发电机单元的励磁调节器的控制信号上对信号进行相移和放大，从而抑制了发电机单元的次同步振荡。}}

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公开/公告号WO2020052685A1

专利类型
公开/公告日2020-03-19

原文格式PDF
申请/专利权人 STATE GRID QINGHAI ELECTRIC POWER COMPANY;ECONOMIC TECHNOLOGY RESEARCH INSTITUTE STATE GRID QIANGHAI ELECTRIC POWER COMPANY;CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED;STATE GRID CORPORATION OF CHINA;
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申请/专利号WO2019CN105937
发明设计人 MA XUE;YANG DAYE;PENG FEI;LIU FEI;CHEN XUE;HOU SHENGLIN;LIANG GUOYONG;CHE YANYING;DU NING;ZHANG XIANGCHENG;SONG RUIHUA;TIAN XU;JIANG HONGLI;LI NAN;ZHOU PEIPENG;TAO XIN;
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申请日2019-09-16
分类号H02J3/24;H02J3/18;
国家 WO
入库时间 2022-08-21 11:12:47

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