deletions | additions       diff --git a/section_Derivation_of_swing_equation__.tex b/section_Derivation_of_swing_equation__.tex  index 73fd7a6..2575ba6 100644  --- a/section_Derivation_of_swing_equation__.tex  +++ b/section_Derivation_of_swing_equation__.tex 
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\end{align}    \begin{equation}  \label{eq:swing}  \ddot{\theta_i}=\underbrace{\dfrac{P_i^{\,\text{source}}-\kappa_i\Omega^2}{I_i\Omega^2}}_{P_i(+/-)}-\underbrace{\dfrac{2\kappa_i}{I_i}}_{\alpha_i}\dot\theta_i+\sum_j\underbrace{\dfrac{P_{ij}^{\,\text{max}}}{I_i\Omega}}_{K_{ij}}\sin(\theta_j-\theta_i)  \end{equation}