  This paper proposes a novel taxonomy of coordination strategies for
distributed energy resources at the edge of the electricity grid, based on a
systematic analysis of key literature trends. The coordination of distributed
energy resources such as decentralised generation and flexibility sources is
critical for decarbonising electricity and achieving climate goals. The
literature on the topic is growing exponentially; however, there is ambiguity
in the terminology used to date. We seek to resolve this lack of clarity by
synthesising the categories of coordination strategies in a novel exhaustive,
mutually exclusive taxonomy based on agency, information and game type. The
relevance of these concepts in the literature is illustrated through a
systematic literature review of 84,741 publications using a structured topic
search query. Then 93 selected coordination strategies are analysed in more
detail and mapped onto this framework. Clarity on structural assumptions is key
for selecting appropriate coordination strategies for differing contexts within
energy systems. We argue that a plurality of complementary strategies is needed
to coordinate energy systems' different components and achieve deep
decarbonisation.
