  The work aims to improve the existing fast load shedding algorithm for
industrial power system to increase performance, reliability, and scalability
for future expansions. The paper illustrates the development of a scalable
algorithm to compute the shedding matrix, and the test performed on a model of
the electric grid of an offshore platform. From this model it is possible to
study the impact on the transients of various parameters, such as spinning
reserve and delay time. Subsequently, the code is converted into Structured
Text and implemented on an ABB PLC. The scalability of the load shedding
algorithm is thus verified, confirming its performance with respect to the
computation of the shedding matrix and the usefulness of the dynamic
simulations during the design phase of the plant.
