WAMS中电压和无功连续数据的三维可视化显示方法
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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.
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.
引文
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[3]王建波,吴耀昊,刘文颖.基于OpenGL的电力系统预警可视化技术实现[J].中国电力,2014,47(8):123-128.
[4]OVERBYE T J.Power system visualization[J].Automation of Electric Power Systems,2005,29(16):60-65.
[5]王波,杨洪耕.电力系统运行动态监视的可视化设计与实现[J].四川电力技术,2014(1):13-18.
[6]徐成,梁睿,程真何,等.面向能源互联网的智能配电网安全态势感知[J].电力自动化设备,2016,36(6):13-18.
[7]章坚民,陈昊,陈建,等.智能电网态势图建模及态势感知可视化的概念设计[J].电力系统自动化,2014,38(9):168-176.
[8]李晓露,柳劲松.可视化分析在大电网运行中的应用[J].上海电力学院学报,2015,31(6):575-580.
[9]沈国辉,孙丽卿,游大宁,等.智能调度系统信息综合可视化方法[J].电力系统保护与控制,2014,42(13):129-134.
[10]韩祯祥,吕捷,邱家驹.科学计算可视化及其在电力系统中的应用前景[J].电网技术,2014,20(7):22-27.
[11]王大亮,邓健,鲁海威,等.基于可视化技术的地区电网智能调度预警系统设计应用[J].电网与清洁能源,2014,30(11):81-86.
[12]刘伟.太原电网预警可视化系统的研究[D].保定:华北电力大学,2014.
[13]许树楷,谢小荣,辛耀中.基于同步相量测量技术的广域测量系统应用现状及发展前景[J].电网技术,2005,29(2):44-49.
[14]TREVOR WERHO,VIJAY VITTAL,SHARMA KOLLURI.Power system connectivity monitoring using a graph theory network flow algorithm[J].IEEE Trans on Power Systems,2016,31(6):4945-4952.
[15]侯丹,李刚,赵文清,等.大数据分析及可视化技术在电网公司的应用[J].智能电网,2015,3(12):1186-1191.
[16]董清,赵远,刘志刚,等.利用广域测量系统定位大电网中短路故障点的方法[J].中国电机工程学报,2013,31:140-146.
[17]孙景强,陈志刚,曹华珍,等.南方电网2010年低频振荡问题[J].电网技术,2007,31(12):93-97.
[18]董清,张玲,颜湘武,等.电网中强迫共振型低频振荡源的自动确定方法[J].中国电机工程学报,2012,32(28):68-75.