Modelling steady state stability reserve for specific Nigerian power transmission grid expansion plan

This paper presents value based steady state stability (SSS) conditions and planning of an installed Sub-Saharan transmission system with situation of frequent system collapse during normal operations. Nigeria's grid was considered as a test case. Both installed and proposed system expansion load flow simulator that employs Newton-Raphson method was created using power system analysis software. An algorithm and criterion that considered all possibleslack bus and load centre scenarios were proposed for simulation of load flow and SSS analysis and to identify the SSS limits and load centers that are critical to SSS of the test grid. The results show that in a condition of slack generation capacity, specific case of test expansion plan for Nigeria exhibits limitation of 17.41-17.8% in SSS reserve, with involvement of high SVC capacity. Generally, the algorithm is applicable for evaluating installed security of Sub-Saharan grids and expansion plan prospects by SSS requirements.