\chapter*{List of Key Symbols} 
\begin{longtable}{ p{.20\textwidth}  p{.70\textwidth} } 
    $K_c$ & Degree of series compensation\\
    $V_w$ & Wind speed\\
	$I_{ds}$, $I_{qs}$ & d and q axis component of stator current of induction machine\\
    $I_{dr}$, $I_{qr}$ & d and q axis component of rotor current of induction machine\\
    $I_{dn}$, $I_{qn}$ & d and q axis component of network current\\
    $I_{d1}$, $I_{q1}$ & d and q axis component of current through line 1 of the double circuit\\
     $I_{d2}$, $I_{q2}$ & d and q axis component of current through line 2 of the double circuit\\
    $V_{ds}$, $V_{qs}$ & d and q axis component of stator voltage of induction generator\\
    $V_{dm}$, $V_{qm}$ & d and q axis component of stator voltage of induction motor\\
    $V_{dc}$, $V_{qc}$ & d and q axis component of series capacitor voltage\\
    $V_{dt}$, $V_{qt}$ & d and q axis component of stator voltage of synchronous generator\\
    $E'_d$ & Induced emf due to flux linkage in the damper winding of synchronous generator\\
    $E'_q$ & Induced emf due to flux linkage in the field winding of synchronous generator\\
    $s_g$ & Slip of induction generator\\
    $s_m$ & Slip of induction motor\\
    $\omega_m$ & Speed of induction motor\\
    $\omega$ & Rotor speed of synchronous generator\\
    $\delta$ & Rotor position of synchronous generator\\
    $V_x$ & Output voltage from measurement transducer in AVR\\
    $E_{fd}$ & Voltage applied to the field winding of synchronous machine\\
    $T_m$ & Mechanical torque input to the generator (Induction or synchronous generator)
    
\end{longtable}