System frequency monitoring in the Nigerian power system

Abstract

Abstract-Frequency is one of the most important measures of the state of a power system, especially for structurally weak and rapidly growing power systems. Thus, frequency monitoring is a desirable practice to ensure reliability and provide data for analysis. This paper reports the joint work between Abubakar Tafawa Balewa University (ATBU) and Rensselaer Polytechnic Institute (RPI) to study frequency dynamics of a relative small power system. We describe the Frequency Disturbance Recorder (FDR) implementation experience at ATBU, Bauchi, Nigeria, and present analysis on the digital recordings obtained by the FDR. A proposal for a university-based frequency monitoring network for the Nigerian power system is also presented. Such monitoring system will allow further investigations on the Nigerian system and ultimately enhance the understanding of the dynamics and control of structurally weak and rapidly growing power systems found in many developing countries.

Application of ambient analysis techniques for the estimation of electromechanical oscillations from measured PMU data in four different power systems

“…Consider the frequency measurements taken for a time window of four hours as shown in Fig 13. This plot compares frequency measurements from two different types of power systems: a loosely regulated power system given by the Nigerian power system, and two tightly regulated power networks, the US Eastern Interconnection (EI) and the Nordic Power System. The measurements of the US Eastern Interconnection are derived from the voltage phasor angle of a PMU in the northern part of the EI, the measurements of the Nordic System were derived from the PMU in Radsted substation in Eastern Denmark, and the frequency measurements from Nigeria were obtained from a Frequency Disturbance Recorder (FDR) [23] installed in Bauchi, Nigeria [28].…”

Localised energy systems in Nigerian power network

“…In such a situation, the system is exposed to the risk of stress and the last resort is to introduce load shedding. Load shedding in Nigeria is done manually which is characterised by human error [94]. Load shedding, loss of generation, loss of load and transmission line trip causes frequency deviation.…”

“…In [94], the estimation of the Nigerian power system electromechanical modes using frequency disturbance recorder measurement was discussed. Two previous papers [95], [96] reported on FDR data analysis from disturbance events and proposed a university-based frequency monitoring network for the Nigerian power system.…”