About 60 results
https://drivepatents.com/patents/1087261 · 12 May 2004
A method for the control of an electric power transmission network comprises the repeated execution of the steps of measuring measured variables (y) that represent electrical and other physical conditions of the network, representing the network as a mixed...
https://drivepatents.com/patents/1087386 · 6 May 2004
Phasor data for voltage and current is measured at several locations (A,B) of the network, and is transmitted to a central processing device (2). Protection functions implemented in local protection devices (3a) are emulated and executed based on given red...
https://drivepatents.com/patents/1087839 · 21 Apr 2004
Parameters of a ward equivalent circuit (6) representing a composite network section of both external and internal network section are determined. Behavior of the ward equivalent circuit connected to the power transmission section, is the analyzed. Indepen...
https://drivepatents.com/patents/1088030 · 14 Apr 2004
The method involves determining a voltage phasor and current phasor at different interfaces (5,6) by simultaneous measurement processes, and an impedance value is computed from the obtained phasors. DEPENDENT CLAIMS are also included for the following: (a)...
https://drivepatents.com/patents/1088063 · 14 Apr 2004
The method involves performing a robust stability analysis of a combined system consisting of all similar units (1,1') and a power grid (3) using the frequency domain representation as parameter. An upper bound of similar units for which the combined syste...
https://drivepatents.com/patents/1090359 · 14 Jan 2004
In a method, computer program and apparatus for estimating parameters of an electric power network the steps of: repeatedly measuring, at a plurality of network locations, synchronous values of electrical network variables; identifying, during network oper...
https://drivepatents.com/patents/1090703 · 2 Jan 2004
The present invention provides a fluid-to-fluid through-the-wall heat exchanger for condensation of a vapour in a primary fluid stream, characterised in that the flow path (5) of the primary fluid stream is defined by an inner cylinder (1), an outer cylind...
https://drivepatents.com/patents/1092580 · 15 Oct 2003
The system has a ring bus bar (2), several outputs (7-10) connected to the bus bar via isolators (3-6), normally closed switching elements (11-14) between each two outputs and a base unit with four outputs and commutation (11,12) and switch-off (13,14) swi...
https://drivepatents.com/patents/1097106 · 2 Apr 2003
Process for determining the concentration of a solution (SL) of a solid or liquid in a solvent whose density if different from the density of the solid or liquid comprises immersing a number (N) of bodies (K) in the solution, in which N is at least 1 and e...
https://drivepatents.com/patents/1097475 · 19 Mar 2003
Magnetic field generation system has a 2-D coil arrangement with two orthogonal coils (1, 2) surrounding a machine or system (4) with the coil axes (11, 12) perpendicular to each other. The coils are supplied by two alternating power supplies (8, 9). To ge...