CAJ | 학술논문

有关整定导则要求“失磁阻抗判据应校核不抢先于励磁低励限制动作”，但工程上失磁保护与励磁低励限制的整定是分开进行的，并且在不同的坐标系中描述，容易造成二者动作失去配合。针对大型水轮发电机常用的失磁保护定子侧静稳阻抗判据，结合具体保护装置实现方法，论述了其与低励限制动作区如何进行比较的计算方法，探讨了失磁保护与低励限制的动作配合关系。并在最后讨论了改善低励限制与失磁保护定子侧阻抗判据配合的方案。
유관정정도칙요구“실자조항판거응교핵불창선우려자저려한제동작”，단공정상실자보호여려자저려한제적정정시분개진행적，병차재불동적좌표계중묘술，용역조성이자동작실거배합。침대대형수륜발전궤상용적실자보호정자측정은조항판거，결합구체보호장치실현방법，논술료기여저려한제동작구여하진행비교적계산방법，탐토료실자보호여저려한제적동작배합관계。병재최후토론료개선저려한제여실자보호정자측조항판거배합적방안。
According to related setting calculation guide, the impedance criterion of loss of excitation (LOE) protection should be verified to make sure LOE protection operates before under excitation limit (UEL) control. However, the setting values of LOE and UEL are calculated separately, and their operation characteristics are defined in different coordinate systems, leading to the mismatch of each other easily. Considering the steady state stability impedance criterion commonly used for large hydro-generators LOE protection, this paper presents an algorithm of comparing the operation zone of LOE and UEL with the concern of specific protection device. Furthermore, the paper investigates the coordination relationship between LOE protection and UEL control. At last, several schemes are given on better cooperation of UEL with LOE impedance criterion on stator side.