CAJ | 학술논문

回顾电网实际发生的某次风电机组高电压脱网事故典型特征，总结提出：研究导致事故深层原因应充分考虑风电场汇集地区动态无功补偿控制的影响。基于简单系统推导出计及风电场感性支路恒无功控制影响的无功功率—电压灵敏度表达式，从原理上阐明目前动态无功补偿装置所广泛采用的感性支路恒无功控制方式将导致大规模风电汇集地区电网无功功率—电压灵敏度增大，其增大的幅度取决于感性支路的初值，并最终指出风电场感性支路恒无功控制方式导致的无功功率—电压灵敏度增大是导致“5·14”风电大规模脱网的主要原因之一。最后，结合实际系统的典型案例进行了仿真验证。
회고전망실제발생적모차풍전궤조고전압탈망사고전형특정，총결제출：연구도치사고심층원인응충분고필풍전장회집지구동태무공보상공제적영향。기우간단계통추도출계급풍전장감성지로항무공공제영향적무공공솔—전압령민도표체식，종원리상천명목전동태무공보상장치소엄범채용적감성지로항무공공제방식장도치대규모풍전회집지구전망무공공솔—전압령민도증대，기증대적폭도취결우감성지로적초치，병최종지출풍전장감성지로항무공공제방식도치적무공공솔—전압령민도증대시도치“5·14”풍전대규모탈망적주요원인지일。최후，결합실제계통적전형안례진행료방진험증。
The typical characteristics of a certain high-voltage trip-off accident of wind turbines that does happen in a power system are reviewed.It is concluded that in learning about the root cause of the accident,we need to give careful consideration of the impact of dynamic reactive compensation control.Based on a simple equivalent system,the reactive power-voltage sensitivity expression considering the influence of constant reactive power control of inductive branch in dense wind power areas is derived.It is proved in principle that constant reactive power control on the inductive branch adopted by a static reactive compensator will cause an increase in reactive power-voltage sensitivity.And the growth rate depends on the initial value of the inductive branch.Further,it is pointed out that the increase in reactive power-voltage sensitivity due to constant reactive power control on the inductive branch is one of the main causes that leads to the“5 ·14" high-voltage trip-off accident.Finally,the typical case of an actual system is verified by simulation.