fix typo

Signed-off-by: Martijn Govers <Martijn.Govers@Alliander.com>

docs/user_manual/components.md

@@ -751,7 +751,7 @@ The following additional requirements exist on the input parameters.
 - The voltage band must be sufficiently large, i.e., it must be greater than the largest change in voltage due to a change in tap position. This means, that
   $U_{\text{band}} \geq \frac{\text{tap_size}/u_\text{tap_side}}{\left(1 + \left(\left|\text{tap_min}\right| - \left|\text{tap_nom}\right|\right)\frac{\text{tap_size}}{\text{u_tap_side}}\right)^2}u_{\text{control_side}}$
 - The line drop compensation is small, in the sense that its product with the typical current through the transformer is much smaller (in absolute value) than the smallest change in voltage due to a change in tap position. This means, that
-  $\left|z_comp\right|\left|I_{\text{node}}\right| \ll \frac{\text{tap_size}/u_\text{tap_side}}{\left(1 + \left(\left|\text{tap_max}\right| - \left|\text{tap_nom}\right|\right)\frac{\text{tap_size}}{\text{u_tap_side}}\right)^2}u_{\text{control_side}}$
+  $\left|z_{\text{compensation}}\right|\left|I_{\text{node}}\right| \ll \frac{\text{tap_size}/u_\text{tap_side}}{\left(1 + \left(\left|\text{tap_max}\right| - \left|\text{tap_nom}\right|\right)\frac{\text{tap_size}}{\text{u_tap_side}}\right)^2}u_{\text{control_side}}$
 
 These requirements make sure no edge cases with undefined behavior are encountered. Typical real-world power grids already satisfy these requirements and they should therefore not cause any problems.