CAJ | 학술논문

介绍了某电厂汽轮发电机组一次调频试验导致电网发生低频功率振荡的事件，分析了振荡产生的机理，提出了防止该类振荡发生的措施。根据广域测量系统记录的振荡波形分析了此次低频振荡的基本特征，应用PSCAD/EMTDC仿真重现了一次调频引发低频振荡的过程；探讨了确定低频振荡属于负阻尼还是共振机理的原则，结合不同汽轮机控制方式和参数下的阻尼特性，确定了本次低频振荡的原因是汽轮机控制系统参数设置不当，导致一次调频投入情况下系统总阻尼为负值；为防止该类振荡的发生，需要合理设置一次调频控制系统参数。
개소료모전엄기륜발전궤조일차조빈시험도치전망발생저빈공솔진탕적사건，분석료진탕산생적궤리，제출료방지해류진탕발생적조시。근거엄역측량계통기록적진탕파형분석료차차저빈진탕적기본특정，응용PSCAD/EMTDC방진중현료일차조빈인발저빈진탕적과정；탐토료학정저빈진탕속우부조니환시공진궤리적원칙，결합불동기륜궤공제방식화삼수하적조니특성，학정료본차저빈진탕적원인시기륜궤공제계통삼수설치불당，도치일차조빈투입정황하계통총조니위부치；위방지해류진탕적발생，수요합리설치일차조빈공제계통삼수。
A low frequency oscillation incident caused by primal frequency modulation test on steam turbine generator units is described.The mechanism of oscillation is analyzed and the countermeasure is proposed.The basic oscillation characteristics are analyzed according to the low frequency oscillation waves recorded by the wide area measuring system,and the oscillation process is simulated in the PSCAD/EMTDC software.The principle of determining the low frequency oscillation mechanism (the negative damping or the resonance mechanism) is discussed.By referring to the damping characteristic curves of different steam turbine control modes and parameters,the cause of the low frequency oscillation incident is found to be the improper steam turbine control parameter setting which results in the negative system damping.To aviod this kind of low frequency oscillation,proper parameter setup of the steam turbine control system is essential.