New Methods of Power Nodes Automatic Operation in Scope of Voltage Regulation, Reactive Power and Active Power Flow Control

Abstract

Group control systems (ARNE/ARST) are used for the automatic regulation of voltage, reactive power and active power flow control in polish National Power System (NPS). Those systems are used in polish NPS since ’90, however due to constantly expanding electrical grid and new requirements for automation systems, a new solutions and control methods should be elaborated. Conditions for automatic control of power nodes are strongly dependent on requirements of Transmission System Operators (TSO) in each country, therefore solutions presented in paper will be appropriate for polish NPS. Paper describes solution of complex power node, on which automation should be prepared individually. On the basis of its case a new methods of group control were introduced i.e. control algorithms for phase shift transformers, coordination between step-up transformers and generators and control of industrial factories active/reactive power flow in respect to requested power angle. Control methods presented in this paper were implemented on industrial objects. Verification of its correctness is presented in the form of measurements from those industrial objects.