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??????本文目錄如下:??????
目錄
??1 概述
??2 運行結(jié)果
??3?參考文獻(xiàn)
??4 Matlab代碼實現(xiàn)
??1 概述
城市軌道交通供電系統(tǒng)是為城市軌道交通運營提供所需電能的系統(tǒng),不僅為城市軌道交通電動列車提供牽引用電,而且還為城市軌道交通運營服務(wù)的其他設(shè)施提供電能,如照明、通風(fēng)、空調(diào)、給排水、通信、信號、防災(zāi)報警、自動扶梯等,應(yīng)具備安全可靠、技術(shù)先進(jìn)、功能齊全、調(diào)度方便和經(jīng)濟(jì)合理等特點。
在城市軌道交通的運營中,供電一旦中斷,不僅會造成城市軌道交通運輸系統(tǒng)的癱瘓,還會危及乘客生命與財產(chǎn)安全。因此,?高度安全可靠而又經(jīng)濟(jì)合理的電力供給是城市軌道交通正常運營的重要保證和前提。
??2 運行結(jié)果
?
?
部分代碼:
clear;
clc;
load('Tram.mat');
pelect=zeros(size(T,2),1);
% Extracting the power demand from the data structure T
for i=1:size(T,2)
? ? pelect(i,1)=T(1,i).pelec;
end
figure;
plot(1:size(T,2),pelect);
title('Power Supply Profile');
% Calculating the maximum power demand of the time period
pmax=max(pelect);
ptotal=0;
for i=1:size(pelect,1)
? ? ptotal=ptotal+pelect(i,1);
end
% ptotal=sum(pelect);
% Calculating the average pwower demand over the time period
pavg=ptotal/size(pelect,1);
disp('Average power: ' );
disp(pavg);
% Calculating the PPH
% If both average and maximum are greater than zero,?
% Pavg and Pmax will mostly be greater than zero.
% If it is less than zero, we definitely need storage and hence PPH is set
% to 1.
if(pavg>=0 && pmax>0)
? ? pph=1-(pavg/pmax);
else
? ? pph=1;
end
disp('Potential for hybridization in power: ' );
disp(pph)
energyInBatt=zeros(size(pelect,1)-1,1);
% Pavg is assumed to be provided by the external supplier and the peaks
% shall be managed by the storage, so the energy in battery shall be
% calculated on the basis of the difference between the electrical power
% and the average power.
for i=2:size(pelect,1)
? ? energyInBatt(i,1)=energyInBatt(i-1,1)-(pelect(i-1,1)-pavg);
end
figure;
plot(energyInBatt);
title('Energy in battery (in J)');
% Useful energy of a battery is definaed as the difference between the maximum and
% minimum energy stored in a time cycle
eu=max(energyInBatt)-min(energyInBatt);
disp(strcat('Useful Energy (in Joules): ',num2str(eu)));
if(eu~=0 && pmax>=0)
? ? phe=pmax/eu;
else
? ? phe=Inf;
end
disp('Potential for hybridization in energy: ' );
disp(phe)
% So using the PHE and PPH values, we can idetify that either power or
% energy is more influential for the design of the battery system.
??3?參考文獻(xiàn)
部分理論來源于網(wǎng)絡(luò),如有侵權(quán)請聯(lián)系刪除。文章來源:http://www.zghlxwxcb.cn/news/detail-422444.html
[1]魯宗相,王彩霞,閔勇,周雙喜,呂金祥,王云波.微電網(wǎng)研究綜述[J].電力系統(tǒng)自動化,2007(19):100-107.文章來源地址http://www.zghlxwxcb.cn/news/detail-422444.html
??4 Matlab代碼實現(xiàn)
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