It is known that Struve function Hν and modified Struve function Lν are closely connected to Bessel function of the first kind Jν and to modified Bessel function of the first kind Iν and possess representations through higher transcendental functions like generalized hypergeometric 1 F 2 and Meijer G function. Also, the NIST project and Wolfram formula collection contain a set of Kapteyn type series expansions for Lν (x). In this paper firstly, we obtain various another type integral representation formulae for Lν (x) using the technique developed by D. Jankov and the authors. Secondly, we present some summation results for different kind of Neumann, Kapteyn and Schlömilch series built by Iν (x) and Lν (x) which are connected by a Sonin-Gubler formula, and by the associated modified Struve differential equation. Finally, solving a Fredholm type convolutional integral equation of the first kind, Bromwich-Wagner line integral expressions are derived for the Bessel function of the first kind Jν and for an associated generalized Schlömilch series.