Power system dynamic response calculations

TLDR

Engineers in the power industry face a growing challenge: simulating system dynamic responses requires solving thousands of nonlinear differential‑algebraic equations, placing a heavy computational and financial burden on current digital resources. The paper emphasizes the need to adopt the most efficient and reliable modern calculation techniques for power system dynamic response. The authors review and compare routine and emerging calculation methods, focusing on solution concepts and computational techniques while highlighting modeling aspects that influence method selection. The review concludes by summarizing the current state of the art and predicting future development directions.

Abstract

Engineers in the power industry, face the problem that, while stability is increasingly a limiting factor in secure system operation, the simulation of system dynamic response is grossly overburdening on present-day digital computing resources. Each individual response case involves the step-by-step numerical solution in the time domain of perhaps thousands of nonlinear differential-algebraic equations, at a cost of up to several thousand dollars. A high premium is thus to be placed on the use of the most efficient and reliable modern calculation techniques. This paper is a critical tutorial-review of the calculation methods used routinely or investigated for use by the industry. It concentrates on solution concepts and computational techniques rather than on the analysis of the numerical methods. Details of system modeling are only emphasized when they affect the choice of solution method. The paper concludes with a view of the state of the art and a prediction of future directions of development.