摘要
电网广域测量系统的高速连续采样数据的直观显示技术,对于实时监视电网的安全稳定性具有重要意义。通过将一个采样点的电压相量幅值数据映射成绘制圆弧的半径,将该采样点的无功数据映射成绘制圆弧长度的弧心角,一个采样点的电压和无功数据被绘制成一段弧线,连续采样的电压和无功数据将被绘制成三维曲面,提出了一种电网中电压和无功连续数据的三维可视化绘图新方法。通过对比电动机的电压和无功数据的不同绘图方法的显示效果,以及以电网中短路故障和低频振荡扰动的仿真数据为例,验证了该方法具有以下特点:可将电压和无功的连续采样数据绘制成具有一定形状的图形,使电动机的电压失稳状态显示更直观;结合电网的结构图,使电网中故障点定位和低频扰动源定位实现了可视化直观显示。该方法对于电网中故障和扰动的快速连续直观显示,具有一定价值。
The visualization technique using the high-speed continuous sampling data of wide area measurement system (WAMS) is of great significance for real-time monitoring of the security and stability of the power grid. The magnitude of measured voltage phasor is transformed into the radius for drawing one arc, the measured reactive power is transformed into the angle to draw the arc length,and the sampled data of voltage and reactive power will be drawn as the arc. By using the method, the continuously measured data of voltage and reactive power would be drawn as a three-dimensional surface. A new visualization method for drawing continuous data of voltage and reactive power is proposed in this paper. The visualization effect was verified by three examples, such as drawing the voltage and reactive power data of motor, locating the earth-fault and low frequency oscillation source in power grid. The visualization results of this method show that the procedure of losing voltage stability of motor, the location of earth fault and location of low frequency oscillation source could be observed easily in power grid. It is valuable to display the continuously sampled data of WAMS and helpful to monitor the disturbance in power grid by using this method.
作者
董清
刘超
李龙发
DONG Qing;LIU Chao;LI Longfa(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;Hebei Electric Power Transmission Company,Shijiazhuang 050000,China)
出处
《电力科学与工程》
2019年第5期12-18,共7页
Electric Power Science and Engineering
关键词
电网
广域测量系统
电压
无功
可视化
电动机稳定性
短路故障定位
低频振源定位
power grid
wide area measurement system
voltage
reactive power
visualization
motor stability
fault location
location of low frequency oscillation
