Siemens Aktiengesellschaft

Michael Metzger

Joachim Bamberger

Florian Steinke

Harald Held

Matthias Kurz

Andrei Szabo

Philipp Wolfrum

Michael Bernhard Buhl

Rudolf Sollacher

Sebastian Thiem

Arvid Amthor

Clemens Hoffmann

Klaus Weinzierl

Steffen Lamparter

Clemens Otte

Ulrich Münz

Jan-Gregor Fischer

Kai Heesche

Silvio Becher

Dagmar Beyer

Ralph Grothmann

Sebastian Nielebock

Martin Kautz

Jochen Schäfer

Albrecht Sieber

Sebastian Schreck

Uwe Stürmer

Helmut Liepold

Stefan Niessen

Markus Reischböck

Ulrich MÜNZ

Jochen Schafer

Jochen SCHÄFER

Various embodiments include a control apparatus for controlling a power consumption and/or a power output of an energy system via a network connection point of a low-voltage network, wherein a line voltage can be detected at the network connection point by the control apparatus. The control apparatus comprises a processor programmed to reduce the power consumption and/or to increase the power output if the line voltage is below a first threshold value and/or to increase the power consumption and/or to reduce the power output if the line voltage is above a second threshold value greater than the first threshold value.

Control apparatus and method for controlling a power consumption and/or a power output of an energy system, and low-voltage network

Various embodiments include a method for controlling an exchange of energy in an energy system having multiple energy subsystems each connected to one another for the purpose of exchanging energy, the method comprising: receiving respective supply data at a control center from the energy subsystems, wherein the supply data comprise respective remuneration conditions of the applicable energy subsystem for receiving and/or providing energy; determining optimum conditions on the basis of the supply data of the energy subsystems; and controlling the exchange of energy between the energy subsystems on the basis of the optimum conditions with the control center.

Method for controlling an exchange of energy between energy sub-systems in adjusted harmonised conditions; control centre; energy system; computer program; and storage medium

A method for computer-supported control of the power in an electrical power supply network, including a plurality of nodes which are connected to one another via power lines, each containing a first energy generator and/or a second energy generator and/or an energy consumer is provided. A power estimation is provided for each node, which is composed of an estimation of the future load of the energy consumer and an estimation of the future power of the second regenerative energy generator in the respective node. Fluctuations of a first type of the power estimations for the respective nodes are permitted in a first predetermined tolerance region, and fluctuations of a second type of the power estimations are permitted in a second predetermined tolerance region. The fluctuations of the first type are compensated by primary balancing power and the fluctuations of the second type are compensated by secondary balancing power.

Method for the computer-aided control of the power in an electrical grid

The present disclosure relates to combined heat and power plants. The teachings thereof may be embodied in methods for operating such a plant to provide electrical and thermal energy to a consumer unit, comprising: simultaneously generating electrical energy and heat in a process flow based on a demand for electricity; storing heat generated in excess of a demand for heat; and increasing a heat output when a difference between an actual provided heat output and the demand for heat is exceeded.

Combined heat and power plant and method for operation thereof

A method for the closed-loop control of a voltage in a distribution network that supplies nodes with voltage via mains power lines. A node, which recognizes that the local voltage of the distribution network present at the node lies above or below a permissible supply voltage range, switches from slave mode to master mode and in the master mode regulates the local voltage that is present, by drawing or supplying reactive power in order to reach the permissible supply voltage range. The node then indicates this to other nodes of the distribution network that are in slave mode by modulating an indication signal pattern onto the reactive power being drawn or supplied by the node. The signal pattern has a signal parameter which is proportional to the amplitude of the reactive power that is drawn or supplied by the node.

Method and apparatus for regulating a voltage in a distribution system

A novel power allocation method, as early as in the procurement of electricity, takes account of network congestion and simultaneously enables logical and physical separation of network control and power allocation. An allocation component and a network monitoring component separately from one another detect tasks relating to the allocation of power and via predetermined interfaces exchange information or intermediate states relating to the allocation before the allocation is actually implemented for power control. This enables adaptive power control of power sources and consumer units and the flexible implementation of a plurality of requirements of a modern power distribution network.

Power control method, device and system for instigating a power control based on the examined allocation

A method for controlling an electrical energy distribution network in which electrical power is provided via network nodes connected via power lines is provided. A portion of the network nodes are controllable network nodes with respective local controllers, and at least a portion of the controllable network nodes are energy generators. The energy distribution network is coupled to an energy transmission network at a point of common coupling and provides electrical power to the energy transmission network at the point of common coupling. The electrical power originates from the controllable network nodes. A central controller communicates with the local controllers and the energy transmission network. The central controller controls the energy distribution network with the aid of the communication with the local controllers and the energy transmission network such that at the point of common coupling, primary control power and short-circuit power are kept available for the energy transmission network.

Controlling an electrical energy distribution network

A method for signaling and controlling in a power grid coupling a plurality of actuators for providing power signals is provided. At a first actuator, a voltage problem is detected, a communication signal is generated based on the detected voltage problem, and the generated communication signal is transmitted over the power grid. At a second actuator, the transmitted communication signal is received, a control action is generated based on the received communication signal and the generated control action is transmitted over the power grid towards the first actuator.

Signaling and controlling a power grid coupling actuators

The rotational speed of the drum of an ore mill may be controlled variably over time. By rotating the drum during a first time interval at high speed, especially hard or dense particles are broken up by tumbling. At the same time, the discharge characteristics of the mill are adversely affected. In a subsequent second time interval, the drum is rotated at a slower speed, and the material is discharged more effectively, whereas the tumbling movement inside the mill is not achieved. The combination of said different modes of operation within short time periods in continuous operation may improve both the comminution as a result of a tumbling motion of the material and also the discharge of the ground material. By regulating the rotational speed with different target values within short time windows, different requirements for the movement behavior of the material to be ground and for the discharge characteristics of the ground material can be simultaneously optimized. This may allow a higher throughput for the mill.

Method for operating a mill

A method for improving the usability of photovoltaic installations (PV installations) by taking account of shading information of adjacent PV installations for forecasting the power output by a relevant PV installation is provided. In particular, cloud movements and cloud shapes are taken into account. This improves the accuracy of the forecast. Here, it is advantageous that short-term forecasts in relation to e.g. the next 15 minutes are possible and a substitute energy source can be activated accordingly, in good time, prior to a dip in the power output by the PV installation. The invention can be used e.g. in the field of renewable energies, PV installations or smart grids.

Method and device for determining the power output by a photovoltaic installation

A method is disclosed for operating a mill at continuous input and output mass flows, and to the mill, wherein a process model based on power balance equations and mass balance equations is used. Characteristic process variables can be measured in a simple manner outside the mill. Characteristic process variables which are still not known can be ascertained by means of inserting the measured values into a respective power balance equation, assuming that the other process variables are in each case known or are insignificant. On this basis, the mill can be actuated in an optimum manner in order to provide a high output power.

Use of temperature measurements for indirect measurement of process variables in milling systems

An assembly is provided for receiving characteristic data of a mill including a rotating mill sleeve having rotor coils and a stator having stator coils, wherein oscillations of the mill sleeve are transmitted to stator coils and/or measurement coils on the stator. The assembly may include stator coil(s) configured to tap power supply induction voltages to detect oscillations of the mill sleeve, wherein the stator coil(s) and/or measurement coil(s) designed to tap induction voltages are positioned in a sector of the mill sleeve in which large oscillations are expected based on the scale of the mill sleeve. Further, a method includes determining the induction voltage induced on stator coil(s) and/or measurement coil(s) by tapping at least one stator coil power supply and/or by tapping at least one measurement coil, and deriving status variable(s) of a milling method that reflect the fill level status in the sector of the respective coil.

Assembly, operating method and circuit for a mill driven by a ring motor

A method for optimizing the operation of a metallurgical plant using a model by modeling supply and discharge media streams, predetermining structure parameters which define the media streams, linking the media streams to one another, predetermining starting parameters which describe initial states, predetermining input operating parameters, determining and outputting output operating parameters, and determining and outputting end parameters, which describe end states of the units, by the model, predetermining the structure parameters to an optimization computer by a user and transmitting the parameters from the optimization computer to a model, and determining optimized operating parameters by the optimization computer on the basis of the starting parameters and an assessment criterion in accordance with an optimization algorithm using the model, wherein the assessment criterion is predetermined to the optimization computer by the user.

Mathematical model for a metallurgical plant, and method for optimizing the operation of a metallurgical plant using a model

In a method for controlling a compression installation (), the installation has at least two compressor units (i=1, , N) that can be separately turned on or off, a plurality of devices for modifying the output of the compressor units and a control device (). Known methods and devices do not function optimally in terms of the power consumption of the entire compression installation. The power consumption (EG) for the operation of a plurality of compressor units (i=1, , N) of a compression installation () can be optimized by calculating a novel circuit configuration (Si, t) and automatically adjusting the novel circuit configuration (Si, t) by a control device ().

Method for optimizing the functioning of a plurality of compressor units and corresponding device

The invention relates to a method for controlling and regulating the temperature of a metal strip in a finishing train of a hot rolling mill. A target function is formed by comparing a desired temperature gradient with an actual temperature gradient. The target function measures deviations from desired indications positioned in various places on the finishing train. The speed of the strip and the flow of the cooling agent are adjusted by predicting with the aid of a method of non-linear optimization with auxiliary conditions and are regulated and controlled online by solving a quadratic optimization problem with linear auxiliary conditions, preferably with the aid of an active set strategy.

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Markt Schwaben, Germany

Michael Metzger