Direct calculation method for the maximum of 3D sinusoidal steady-state field vector

2013 ◽  
Author(s):  
Shili Liu ◽  
Zezhong Wang ◽  
Xin Liu
Keyword(s):  
Steady State ◽  
Calculation Method ◽  
Direct Calculation ◽  
Field Vector

The Research of a Derivation Calculation Method for the Maximum Power Point in Grid-Connect Photovoltaic System

2012 ◽  
Vol 588-589 ◽  
pp. 583-586
Author(s):  
Yu Xin Wang ◽  
Feng Ge Zhang ◽  
Xiao Ju Yin ◽  
Shi Lu Zhu
Keyword(s):  
Calculation Method ◽  
Maximum Power Point Tracking ◽  
Direct Calculation ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Duty Ratio ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

A derivation calculation methods for the maximum power point tracking is proposed in this paper. This method is the direct calculation method for the maximum power point tracking, through the calculation of the derivative value of the power to voltage, adjust the change values of occupies emptiescompared, which is used to deduce the voltage and current value, judge whether the derivative of the power to the voltage is zero, if it is ture, the maximum power point is got. Hardware is used the method to regulate the duty ratio of PWM in DC/DC boost circuit ,though once sampling, it can calculate the value of voltage and the duty ratio at maximum power point. The prototype experiments using DSP2812 chip verify that the inverter can better realize the most power tracing, high accuracy, and the system has the high stability.

A new approach to steady state analysis of nonlinear electrical circuits

2017 ◽  
Vol 36 (3) ◽  
pp. 716-728 ◽  
Author(s):  
Tadeusz Sobczyk ◽  
Michał Radzik
Keyword(s):  
Steady State ◽  
Periodic Solutions ◽  
Nonlinear Differential Equations ◽  
Direct Calculation ◽  
Electrical Circuits ◽  
Steady State Analysis ◽  
Content Type ◽  
The Time Domain ◽  
Approach To Steady State ◽  
State Analysis

Purpose The purpose of this study is to identify a novel methodology for direct calculation of steady-state periodic solutions for electrical circuits described by nonlinear differential equations, in the time domain. Design/methodology/approach An iterative algorithm was created to determine periodic steady-state solutions for circuits with nonlinear elements in a chosen set of time instants. Findings This study found a novel differential operator for periodic functions and its application in the steady-state analysis. Research limitations/implications This approach can be extended to the determination of two- or multi-periodic solutions of nonlinear dynamic systems. Practical implications The complexity of the steady-state analysis can be reduced in comparison with the frequency-domain approach. Originality/value This study identified novel difference equations for direct steady-state analysis of nonlinear electrical circuits.

scholarly journals Gas turbine power calculation method of turboshaft based on simulation and performance model

2018 ◽  
Vol 189 ◽  
pp. 02003 ◽  
Author(s):  
Heng Wu ◽  
Shufan Zhao ◽  
Jijun Zhang ◽  
Bo Sun ◽  
Hanqiang Song
Keyword(s):  
Steady State ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Calculation Method ◽  
Performance Model ◽  
Power Calculation ◽  
Outlet Temperature ◽  
Acceptance Test ◽  
Test Drive ◽  
Turboshaft Engine

Gas turbine power of turboshaft engine cannot be measured, a total of five typical steady state point test data from the ground slow state to the maximum state were selected according to the factory acceptance test drive of a certain type of carrier-based helicopter turboshaft engine. Combustion chamber three-dimensional simulation model was established to carry on simulation analysis of different typical steady state combustion process. The simulated combustion chamber exit section parameters are input into the established gas turbine isentropic adiabatic aerodynamic calculation model to obtain the gas turbine power and outlet temperature. Select five typical steady state points of five sets of turboshaft engines on the same type to repeat the above calculation process, and compare the calculated value of gas turbine outlet temperature with the acceptance test values, it is found that the error values are all within 5%, and the effectiveness and accuracy of the gas turbine power calculation method are verified.

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