\documentclass[a4paper,11pt]{report}
\usepackage{cite}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{algorithmic}
\usepackage{graphicx}
\usepackage{textcomp}
\usepackage{xcolor}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{booktabs}
\usepackage{cuted}
\usepackage{multicol}
%\usepackage{subfigure}
\usepackage{epstopdf}
\usepackage{epsfig}
\usepackage{subfigure}
\begin{document}
\onecolumn
\begin{table}
\centering
\caption{Eigenvalues of Study System with and without SSSC for 75\% hybrid series compensation}
\begin{tabular}{c|c|c|c|c}
\toprule
\multirow{4}{*}{Mode}&\multicolumn{4}{|c|}{75\% Compensation level}\\
\cmidrule{2-5}
&\multicolumn{2}{|c|}{case:1(without SSSC)} &\multicolumn{2}{c}{case:2(with SSSC)} \\
\cmidrule{2-5}
&$\sigma\pm j\omega$& $\zeta$ &$\sigma\pm j\omega$& $\zeta$ \\
\midrule
Super-Synchronous &-9.5903$\pm$629.17i&0.01524 &-12.344$\pm$556.39i&0.02218\\
Sub-Synchronous &1.6034$\pm$123.7 &-0.01296&-9.0587$\pm$137.23i&0.06586\\
Shaft &-0.4911$\pm$6.1496i&0.07962 &-0.48842$\pm$6.1493i&0.07917\\
Torsional &-85.88 $\pm$38.471i&0.91261 &-85.883$\pm$37.936i&0.91474\\
Electromechanical &-11.602$\pm$91.825i&0.12535 &-9.6224$\pm$94.729i&0.10106\\
\midrule
\multirow{7}{*}{Other}&-2416.6$\pm$1271.4i&0.88511 &-2421.1$\pm$1252.1i&0.88825\\
& 0$\pm$0i & - &-2670.3 &1 \\
& 0$\pm$0i & - &-110.25 &1 \\
& -0.12579 & 1 &-0.15132 &1 \\
& -0.0035219 & 1 &-0.0034435 &1 \\
& & &0$\pm$0i &- \\
& & &0$\pm$0i &- \\
\bottomrule
\label{comparison 75\%}
\end{tabular}
\end{table}
\begin{table}
\centering
\caption{Eigenvalues of Study System with and without SSSC for 90\% hybrid compensation}
\begin{tabular}{c|c|c|c|c}
\toprule
\multirow{4}{*}{Mode}&\multicolumn{4}{c}{90\% Compensation level}\\
\cmidrule{2-5}
&\multicolumn{2}{|c|}{case:1(without SSSC)} &\multicolumn{2}{c}{case:2(with SSSC)} \\
\cmidrule{2-5}
&$\sigma\pm j\omega$& $\zeta$ &$\sigma\pm j\omega$& $\zeta$ \\
\midrule
Super-Syn. &-10.42$\pm$653.25i &0.01595 &-13.605$\pm$570.94i &0.02382\\
Sub-Syn. &6.3734$\pm$108.15i &-0.05883&-1.1691$\pm$113.64i &0.01028\\
Shaft &-0.48923$\pm$6.1509i&0.07928&-0.48455$\pm$6.1504i&0.07854\\
Torsional &-86.432$\pm$38.566i &0.91322 &-86.534$\pm$37.766i &0.91652\\
Electromechanical &-16.399$\pm$82.919 &0.19402 &-19.362$\pm$91.845i &0.20628\\
\midrule
\multirow{7}{*}{Other}&-2387.2$\pm$1205i &0.89272 &-2393.8$\pm$1183.5i &0.89642\\
& 0$\pm$0i &- &-2205.5 &1\\
& 0$\pm$0i &- &-111.35 &1\\
& -0.14669 &1 & -0.18936 &1\\
&-0.0021773 &1 &-0.0020965 &1\\
& & &0$\pm$0 &-\\
& & &0$\pm$0 &-\\
\bottomrule
\label{comparison 90\%}
\end{tabular}
\end{table}
\end{document}
答案1
一个更简单的例子，仍然可以重现错误消息
Missing \endcsname inserted. \% \newlabel{comparison 75\%}{{1}{1}}
是
\documentclass{report}
\begin{document}
\begin{table}
\caption{Eigenvalues ...}\label{comparison 75\%}
\end{table}
\end{document}
\%此错误是由于在标签内使用 而导致的。使用类似\label{comparison75percent}或 的\label{comparison75}命令可以使代码可编译且不会出现错误消息。
除此之外， 的\label位置也不正确。请将其移出tabular环境，但应将其移至 之后\caption。