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powernode
牛顿-拉夫逊法潮流计算
基本步骤:
(1)形成节点导纳矩阵
(2)将各节点电压设初值U,
(3)将节点初值代入相关求式,求出修正方程式的常数项向量
(4)将节点电压初值代入求式,求出雅可比矩阵元素
(5)求解修正方程,求修正向量
(6)求取节点电压的新值
(7)检查是否收敛,如不收敛,则以各节点电压的新值作为初值自第3步重新开始进行狭义次迭代,否则转入下一步
(8)计算支路功率分布,PV节点无功功率和平衡节点柱入功率。(Newton-Raphson method flow calculation basic steps : (1) formation of nodal admittance matrix (2) to set up the initial node voltage U, (3) the initial node-generation-related demand. calculated that the constant term formula Vector (4) nodes will be incorporated into the initial voltage-seeking, calculated Jacobian matrix elements (5) solving that equation, seek to amend the vector (6) to strike a new node voltage value (7) to check whether convergence, if not restrained. concentrated in the nodes of the new voltage as the initial value since the first three steps to re-start the narrow iterations. Otherwise, turn into the next (8) Calculation branch power distribution, PV nodes reactive power and balance-node into power.)
- 2007-07-10 19:08:09下载
- 积分:1
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滤波法
A、名称:限幅滤波法(又称程序判断滤波法)
B、方法:
根据经验判断,确定两次采样允许的最大偏差值(设为A),
每次检测到新值时判断:
如果本次值与上次值之差<=A,则本次值有效,
如果本次值与上次值之差>A,则本次值无效,放弃本次值,用上次值代替本次值。
C、优点:
能有效克服因偶然因素引起的脉冲干扰。
D、缺点:
无法抑制那种周期性的干扰。
平滑度差。(A. Name: Limited filter method (also known as program judgement filter method)
B. Method:
Based on experience, the maximum allowable deviation (set to A) of two sampling times is determined.
Judge each time a new value is detected:
If the difference between the current value and the previous value is <=A, the current value is valid.
If the difference between the current value and the previous value is greater than A, then the current value is invalid, abandon the current value and replace the current value with the last value.
C. Advantages:
It can effectively overcome the impulse interference caused by accidental factors.
D. Disadvantages:
That periodic interference cannot be suppressed.
The smoothness is poor.)
- 2020-06-24 18:20:01下载
- 积分:1
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tank
水箱模型,可以计算任意行,任意列,任意孔数的水箱(tank)
- 2010-11-22 10:39:02下载
- 积分:1
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svcnew
电力系统仿真建模需要的模型,可以适合智能电网,分布式发电(power system modeling control smart grid stability)
- 2013-09-13 07:13:16下载
- 积分:1
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interaction
运用DEFINE_MASS_TRANSFER宏 的全空化模型(singhal cavitation model written with DEFINE_MASS_TRANSFER)
- 2021-03-02 16:59:33下载
- 积分:1
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hanning
说明: 用hanning窗的插值FFT算法,适用于电力系统信号的谐波分析(Hanning window with interpolation FFT algorithm, applied to power system harmonic analysis signals)
- 2008-11-25 22:39:26下载
- 积分:1
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PLC程序
说明: PLC与安川伺服驱动通讯控制,实现直驱电机的自由分度、点动等多功能运行(PLC and Sichuan Servo Drive Communication Control to Realize Free Indexing and Pointing of Direct Drive Motor)
- 2020-06-19 18:00:01下载
- 积分:1
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4
说明: PC与PDA数据交互系统 PC与PDA数据交互系统 PC与PDA数据交互系统(Interactive PC and PDA data system PC and PDA Data interactive system Interactive System PC and PDA data)
- 2010-07-29 22:02:49下载
- 积分:1
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cal_class
说明: ;Method : 0-平行六面体
; 1-最小距离
; 2-最大似然
; 3-马氏距离
; 4-神经元网络 ENVI_NEURAL_NET_DOIT
; 5-向量机 ENVI_SVM_DOIT
; 6-IsoData
; 7-K-Means(method: 0-parallelepiped
1 - minimum distance
2-maximum likelihood
3-mahalanobis distance
4-neural network
5-vector machine envi? SVM? Doit
6-IsoData
7-K-Means)
- 2020-02-27 11:20:51下载
- 积分:1
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电力系统暂态故障模拟再现系统
说明: 提出并研制了一种新型电力系统暂态故障模拟再现系统。该系统通过将系统发生故障时故障录波器录下的数据转换为符合IEEE的COMTRADE格式文件,经数据处理软件进行分析后由电脑并口送入多功能继电保护测试仪,最终由测试仪还原成故障时的PT、CT二次侧电压、电流信号。该系统对继电保护装置参数整定、事故原因查找及分析等有辅助作用。(proposed and developed a new type of power system transient fault simulation and reconstruction system.IEEECOMTRADE. The system of relay device parameter setting, the cause of the accident investigation and analysis of a supporting role.)
- 2005-11-01 14:36:33下载
- 积分:1