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发明公开
CN107623336A 基于HVDC整流侧变换器优化同步机次同步振荡的方法和装置 无效 - 驳回

基于HVDC整流侧变换器优化同步机次同步振荡的方法和装置
摘要：
本发明公开了基于HVDC整流侧变换器优化同步机次同步振荡的方法和装置，其中方法的实现包括：获取HVDC闭环控制系统的HVDC整流侧变换器的换流母线的三相交流电压VABC，对三相交流电压VABC进行锁相处理和次同步频率变换，得到需要阻尼的次同步振荡模态，利用带通滤波器保留次同步振荡模态；HVDC闭环控制系统引发电力系统发生次同步振荡后，根据测试信号法得到各个次同步振荡模态需要补偿的相位角；利用相位角补偿由HVDC闭环控制系统引起的相位变化，抑制HVDC闭环控制系统引发的次同步振荡。本发明利用相位角补偿就能增强电力系统对次同步振荡的抑制能力，不需要对已有的换流器进行器件的升级改造，控制实现简单，便于扩展。
摘要（英）：

The invention discloses a method and device for optimizing subsynchronous oscillation of a synchronous machine based on an HVDC rectifier side converter. The method comprises the steps of obtaining three-phase AC voltage VABC of a converter bus of the HVDC rectifier side converter of an HVDC closed-loop control system, carrying out phase locking treatment and subsynchronous frequency conversion onthe three-phase AC voltage VABC to obtain to-be-damped subsynchronous oscillation modes and reserving the subsynchronous oscillation modes by using a band-pass filter; initiating subsynchronous oscillation through the HVDC closed-loop control system and then obtaining to-be-compensated phase angles of various subsynchronous oscillation modes according to a test signal method; and compensating a phase change caused by the HVDC closed-loop control system by using the phase angles and suppressing the subsynchronous oscillation initiated by the HVDC closed-loop control system. The suppression capability of a power system on the subsynchronous oscillation can be strengthened by using phase angle compensation, device upgrading and reconstruction of an existing converter are not needed, controlimplementation is simple and expansion is facilitated.

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