Analysis of the Frequency Profile of a Distribution Generator Connected to a Microgrid

Goh, Kok Lian (2018) Analysis of the Frequency Profile of a Distribution Generator Connected to a Microgrid. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

Text Goh Kok Lian.pdf Restricted to Registered users only Download (2MB)

Abstract

The increasing application of distributed generation in a distribution network has attained a huge attention from many power providers or suppliers internationally. The balancing frequency of the islanded system from the centralized grid is a topic of concern for the energy distributor as well as the consumer. The operation of islanding the local load from the centralized grid may encounter imbalance between load and generation where all the load demand cannot be fulfill by the distribution generators (DG). Thus, the under frequency load shedding strategy is presented in this paper to stabilize the distributed generator. Shedding strategy and generation stabilizing focus on the simulation result showing that the proposed strategy are applicable in the distribution network in Malaysia. In this paper, a new method of UFLS has been proposed and the performance of the proposed UFLS has been investigated using the simulation software DIgSILENT. The method discussed in this paper is monitor the RoCoF of the system and then using the power imbalance equation to compute the amount needed to be shed according to the system condition such as load data. Then the load will sort accordingly using the RoCoF fluctuation to define the load priority. The load shedding will shed based on the power imbalance calculated and the priority defined by the RoCoF fluctuation. Two sets of load data will be illustrated and the results are compared to the traditional UFLS method.