Review on Node Modeling Method of Wind Farm in Power Flow Calculation

2013 ◽  
Vol 427-429 ◽  
pp. 412-415
Author(s):  
Jin Long Liu ◽  
Fei Zhao ◽  
Zhi Rui Liang
Keyword(s):  
Mathematical Model ◽  
Power Flow ◽  
Wind Farm ◽  
Wake Effect ◽  
Power Flow Calculation ◽  
Flow Calculation ◽  
Calculation Process ◽  
Asynchronous Generator ◽  
High Level ◽  
Level Calculation

Node modeling of wind farm in power flow calculation is an issue which must be solved. This paper described mathematical model of asynchronous generator which be used widely, elaborated mathematical model and calculation process of several wind farm node models in power flow calculation, discussed calculation speed and accuracy of every model and pointed out that under the premise of high level calculation speed, how to add wake effect to power flow calculation process will be a significant direction for wind farm modeling studies.

The Study of Wind Farm’s Equivalence Method and Verification

2012 ◽  
Vol 433-440 ◽  
pp. 4439-4445 ◽  
Author(s):  
Hong Lin ◽  
Qin Chao
Keyword(s):  
Power Loss ◽  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Electric Power System ◽  
Wake Effect ◽  
Power Flow Calculation ◽  
Flow Calculation ◽  
Lower Error ◽  
Collector System

When the scale of wind farm is increased quickly, if not considering the impedance of the collection system within wind farm, the bigger error in power flow calculation may be caused. In this paper a simple equivalence method calculating the collector system equivalence impedance by using the equivalence power loss is proposed and wind farm’s equivalence output power model considering wake effect and wind speed is established. The models are applied in power flow calculation of the natural wind farm connected to Urumqi grid, Xinjiang. The results compared with original system power flow show that this method has lower error. By using the losses in the collector system, the method of computing the equivalence impedance is verified in this paper. The equivalence impedance of collector system is calculated from total active power loss and total reactive power loss and current flow of the collector system. The error analysis showed that the equivalence impedance of collector system has lower error. The test results show that the proposed equivalence method is effective and logical and has a certain practicality. The reference is given for farther studying safety and stability operation of electric power system including wind farm.

Processing Method for the Node of Wind Farm in Power Flow Calculation

2011 ◽  
Vol 383-390 ◽  
pp. 3598-3604
Author(s):  
Jian Ping Zhang ◽  
Zhi Jiang Yan ◽  
Quan Fei Ding
Keyword(s):  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Test System ◽  
Active Power ◽  
Power Flow Calculation ◽  
Flow Calculation ◽  
Induction Generators ◽  
Terminal Voltage

At present, there are two kinds of common generators in wind farms, which are induction generators (IG) and doubly-fed induction generators (DFIG). Based on the steady state mathematical models of these two kinds of generators, the processing methods of wind farms in power flow calculation are given. The core idea is to express active power of the generator by a function of wind speed and to express the reactive power by a function of active power, slip and terminal voltage, and then the Jacobian matrix will be corrected according to the relation between terminal voltage and reactive power in the wind farm node. Finally, the IEEE 14-bus test system including wind farm is applied for power flow calculation and analysis. The numerical results show that the mentioned methods are feasible and can satisfy the requirements of the engineering application, which can pave a foundation for further research.

Probability box theory-based uncertain power flow calculation for power system with wind power

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jiaman Ding ◽  
Zhixin Chen ◽  
Yi Du
Keyword(s):  
Wind Speed ◽  
Wind Power ◽  
Power Output ◽  
Power Flow ◽  
Wind Farm ◽  
Flow Model ◽  
Test System ◽  
Box Model ◽  
Power Flow Calculation ◽  
Flow Calculation

Abstract The uncertainty of wind speed may lead to the deviation and change of wind power output, which influences the stability of wind farm. Therefore, in this paper, a probability box (p-box) based uncertain power flow model for wind power is proposed, which initially introduces p-box to power flow calculation. A probabilistic interval power flow model with both probability and interval is established. Firstly, the drift interval of wind speed is obtained and its p-box model is established by analyzing the distribution of wind speed. Secondly, the wind power output p-box is derived from the wind speed p-box based on the relationship between wind power output and wind speed, then the p-box of wind power output is discretized and introduced into the power flow equation to obtain the power flow p-box model. Finally, Newton–Raphson method is used to solve the power flow p-box model. Experiments on data collected from a wind farm (running standard IEEE30-bus test system) in Inner Mongolia demonstrate that our method is more effective and accurate than the traditional Monte Carlo simulation (MCS) and classical interval power flow (IPF) method.

Power Flow Calculation Realization in Software for Grids with Four-Phase Power Lines

2014 ◽  
Vol 698 ◽  
pp. 694-698 ◽  
Author(s):  
Dmitry I. Bliznyuk ◽  
Pavel Y. Bannykh ◽  
Alexandra I. Khalyasmaa
Keyword(s):  
Steady State ◽  
Power Flow ◽  
Calculation Model ◽  
Power Lines ◽  
Power Flow Calculation ◽  
Steady State Analysis ◽  
Flow Calculation ◽  
Analysis Methods ◽  
Electrical Grids ◽  
Three Phase

The paper is devoted to the problem of power flow calculation and steady state analysis methods adaptation for four-phase electrical grids. These methods are based on developed models of four-phase power lines and phase convering transformers. The basis of research is nodal voltages equations for three-phase, four-phase and mixed (combined by three-and four-phase elements) grids. Algorithm of four-phfase elements parameters automized adaptation for power flow calculation model of "RastrWin" software have been developed.

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