Asea Brown Boveri Ag

Stephan Hepner

Andrew Wihler

Bozidar Seketa

Hans-Kaspar Scherrer

Johann-Kaspar Scherrer

In a method for regulating the power of a turbo set (,) converting thermal power into electric power, said turbo set (,) comprising, on a common shaft (,), a turbine (,) driven by the thermal power and a generator (,) driven by the turbine (,) and delivering electric power (P,) to a network (,), the electric power (P,) delivered by the generator (,) is determined and the thermal power (P,) for the turbine (,) is regulated as a function of the measured electric power (P,). Destabilization of the network and overloading of the turbo set (,) are avoided by additionally determining the kinetic power (P,) consumed or delivered by the shaft (,) and by regulating the thermal power (P,) in accordance with the sum of the electric power (P,) and kinetic power (P,).

Method for regulating the power of a turbo set

In a method of controlling and regulating a power plant (,), in which power plant (,) thermal power is generated in a combustion chamber (,) from a gaseous fuel and the thermal power is at least partially converted into electrical power in conversion equipment (,), and in which power plant (,) the fuel for the combustion chamber (,) is produced in a fuel producer (,) from a feed product with the application of thermal and/or electrical power, which is removed at the outlet of the conversion equipment (,), and said fuel is passed on to the combustion chamber (,), optimal stability with a simultaneously wide control dynamic range are achieved in that the production of the fuel in the fuel producer (,) is stabilized by a first control loop (,), and the conversion of the fuel into electrical power in the conversion equipment (,) is stabilized by a second control loop (,), and in that the power plant (,) as a whole is kept within a predefined operating range (a, b) by coupling the two control loops.

Method of controlling and regulating a power plant, and power plant for implementing the method

In a control system for controlling at least one variable (TIT,) of a process, the at least one variable (TIT,) being calculated from a multiplicity of measured process variables (TAT,, p,), the measured process variables (TAT,, p,) in each case being measured via associated measuring sections (,), the transfer functions (G,(s), G,(s)) of which have a different time response, an improvement in particular during transient actions is achieved in that, to avoid instability, correction means (,) which equalize the different time responses of the individual measuring sections (,) are provided.

Control system for controlling at least one variable of a process as well as a use of such a control system

A method for controlling a power plant which delivers electrical power to an electrical grid. The grid has a grid frequency which fluctuates around a nominal frequency. A power output of the power plant is controlled as a function of a control frequency, in such a manner that the power output is increased when the control frequency decreases below the nominal frequency. On the other hand the power output is decreased when the control frequency rises above the nominal frequency. The grid frequency is continuously measured. The measured grid frequency is averaged to give, as a moving average, a slowly varying averaged trend frequency which is characteristic of the long term behavior of the grid frequency. The averaged grid frequency is used as the control frequency, if the measured grid frequency lies within a predetermined band around the averaged grid frequency. The measured grid frequency is used as the control frequency, if the measured grid frequency lies outside the predetermined band.

Method for controlling an output of an electrical power plant

A pipeline system (10) for the controlled distribution of a flowing medium comprises a main line (11) which branches at a branching point (12) into a plurality of branch lines (13,14,15), in each of the branch lines a variable restrictor (V1,V2,V3), by means of which the mass flow in each of the branch lines (13,14,15) can be adjusted and, belonging to each restrictor (V1,V2,V3), a first pressure measuring device (PM1,PM2,PM3), by means of which the pressure drop of flowing medium at the respective restrictor (V1,V2,V3) is measured. Redundancy in measurement, at a limited additional outlay, is obtained in that at least between two of the branch lines (13,14, or 13,15 or 14,15) a second pressure measuring device (PM10 or PM11 or PM12) for measuring the differential pressure between the respective branch lines (13,14 or 13,15 or 14,15) is arranged downstream of the restrictors (V1,V2 or V1,V3 or V2,V3) in the direction of flow.

Pipeline system for the controlled distribution of a flowing medium and

In a method of setting a main controlled variable during the operation of a gas-turbine group, the gas-turbine group essentially comprises a compressor (40), at least one combustion chamber (43), at least one turbine (41) and a generator (46). A desired value (3) is compared with a measured value (4) and the resulting main control difference (5) is hierarchically allocated via a management unit (1) to at least one cascade (9, 18). The cascade (9, 18) is essentially composed of a main-controlled-variable controller (6, 15) and a downstream variable controller (8, 17) which acts on the respective variable actuator (14, 23).

Growing community of inventors

Althäusern, Switzerland

Stephan Hepner