Voltage control grid connection requirements for renewable power plants connected to the electricity transmission system in Nigeria

Upcoming construction proposals for utility-scale photovoltaic plants and discussion of compensation in Nigeria raise the question of appropriate grid code requirements to support system voltage control objectives. The large geographical extent, long lines, and small number of generators in the Nigerian High Voltage System make voltage control a critical issue. This paper evaluates the effect of different power control strategies for a 100 MW solar plant, using dynamic simulation of a detailed grid model. The choice of location in North of Nigeria informs ongoing discussions, and is the first published study of this type. The effect of the strategies are compared, and recommendations are made for transmission system operators and developers to consider as they define interconnection agreements.