  In Part I of this paper we have introduced the closed-form conditions for
guaranteeing regional frequency stability in a power system. Here we propose a
methodology to represent these conditions in the form of linear constraints and
demonstrate their applicability by implementing them in a generation-scheduling
model. This model simultaneously optimises energy production and ancillary
services for maintaining frequency stability in the event of a generation
outage, by solving a frequency-secured Stochastic Unit Commitment (SUC). We
consider the Great Britain system, characterised by two regions that create a
non-uniform distribution of inertia: England in the South, where most of the
load is located, and Scotland in the North, containing significant wind
resources. Through several case studies, it is shown that inertia and frequency
response cannot be considered as system-wide magnitudes in power systems that
exhibit inter-area oscillations in frequency, as their location in a particular
region is key to guarantee stability. In addition, securing against a
medium-sized loss in the low-inertia region proves to cause significant wind
curtailment, which could be alleviated through reinforced transmission
corridors. In this context, the proposed constraints allow to find the optimal
volume of ancillary services to be procured in each region.
