摘要
研究了系统故障后的稳定与不稳定场景下的轨迹信息,发现稳定系统的角速度对功角的一阶导数曲线是逐渐变小的且在切机时刻的值最大;然后通过一个恒定的值来近似系统恢复稳定的切机时刻的角速度对功角的一阶导数;再通过转子运动方程推导出角速度对功角的一阶导数与发电机功率之间关系,从而得到了切机量的算法。该算法计算简单,容易实现,并且可以限定系统的最大摇摆角。最后,在单机无穷大系统中验证了理论的正确性。
This paper studied the trajectory information in stable and unstable scenarios after the system fault,and found the angular velocity of a stable system gradually decreases as the first derivative curve and the value is the largest at generator tripping time.Then a constant value is used to approximate the first derivative of the angular velocity of a stable tripping time.The relationship between the first derivative of the angular velocity and the power of the generator is derived by the rotor motion equation,and the algorithm of the tripping capacity is obtained.The algorithm is simple,easy to implement,and can limit the system′s maximum angle of swing.Finally,the correctness of the theory is verified in the single infinite system.
作者
王峰
WANG Feng(State Grid Fujian Electric Power Co. , Ltd. , Fuzhou 350003. Chin)
出处
《电力与能源》
2018年第2期189-193,共5页
Power & Energy
关键词
电力系统
广域信息
暂态稳定性
相图凹凸性
power systems wide area information
transient stability
convexity of the phase diagram.
