资源简介
sfcl superconducting fault current limiter
代码片段和文件信息
/**
* SFCL resistance characteristic
*
* Copyright (c) 2011 Steven Blair
*
* Permission is hereby granted free of charge to any person obtaining a copy
* of this software and associated documentation files (the “Software“) to deal
* in the Software without restriction including without limitation the rights
* to use copy modify merge publish distribute sublicense and/or sell
* copies of the Software and to permit persons to whom the Software is
* furnished to do so subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS“ WITHOUT WARRANTY OF ANY KIND EXPRESS OR
* IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM DAMAGES OR OTHER
* LIABILITY WHETHER IN AN ACTION OF CONTRACT TORT OR OTHERWISE ARISING FROM
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
function [Rsfcl E J Tsc state] = fcn(current Ta Ts)
% superconductor dimensions and thermal properties
sc_length = 50.0;
sc_diameter = 0.004; % superconductor diameter (m)
sc_area = pi * (sc_diameter / 2)^2; % superconductor cross-sectional area (m^2)
Cv = 1.0e6;
k = 1.5e3;
Csc = sc_length * sc_area * Cv;
Rsc = 1 / (k * sc_length * sc_diameter * pi); % includes the total surface area (minus the “ends“)
%nominal_resistance = rho_Tc * sc_length / sc_area; % SFCL resistance at temperature=Tc
% superconductor characteristics
Jc_77K=1.5e7; % critical current density at 77K (A/m^2)
E0=0.1; % E-field for transition from superconducting state to flux-flow state (V/m)
Ec=1e-6 * 100; % definition of E-field required for Jc (V/m)
alpha_77K=6.0; % exponent value during superconducting state (dimensionless)
beta=3; % exponent value during flux-flow state (dimensionless)
Tc=95; % critical temperature (K)
rho_Tc=1.0e-6; % superconductor resistivity at Tc (ohm-m^2)
% inputs from previous iterations
persistent T; % the instantaneous temperature of the superconductor
persistent prevE; % store the E-field value from the previous iteration
persistent RsfclNew; % history of Rsfcl values for averaging
persistent Qremoved;
persistent Qsc;
persistent time; % elapsed simulation time
if isempty(T)
T = Ta; % Ta is the ambient temperature of the coolant; it is assumed that this does not change
end
if isempty(prevE)
prevE = 0.0;
end
if isempty(time)
time = 0.0;
end
if isempty(RsfclNew)
RsfclNew = [1e-6 1e-6 1e-6 1e-6 1e-6 1e-6 1e-6 1e-6 1e-6 1e-6];
end
if isempty(Qremoved)
Qremoved = 0.0;
end
if isempt
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2011-09-23 12:50 simuli
文件 285 2011-09-23 12:50 simuli
文件 57008 2011-09-23 12:50 simuli
文件 5578 2011-09-23 12:50 simuli
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