Method and device for performing open-loop and closed-loop control of an internal combustion engine generator system

Patent metadata

Field	Value
Publication number	US-9441537-B2
Application number	US-201214118437-A
Country	US
Kind code	B2
Filing date	May 15, 2012
Priority date	May 18, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

The exemplary illustrations generally include a method for controlling and regulating an internal combustion engine-generator system 1000 with a plurality of internal combustion engine-generator units 400 generating electric power which can be connected to a distribution grid and load consumers 200 consuming electric power, with a unit 400 comprising an internal combustion engine 401, 402, 404 - 408 with variable engine speeds and a generator 421 - 428 , characterized in the steps: determining a given operating state Z* of the internal combustion engine 401, 402, 404 - 408 of at least one internal combustion engine-generator unit 400 ; deducting a range of operating states ZB* describing an electric load override L adm depending on the given operating state Z* for the internal combustion engine of at least one internal combustion engine-generator unit 400 , with the determination of the given operating state Z* and the deduction of the range of operating range ZB* occurring based on the calculation model 504 for the internal combustion engines 401, 402, 404 - 408 ; providing a scope of load requirements describing potential load requirements of a plurality of load consumers 200.

First claim

The invention claimed is:

1. A method for controlling and regulating an internal combustion engine-generator system including a plurality of internal combustion engine-generator units configured to generate electric power for a plurality of load consumers wherein each of the plurality of internal combustion engine-generator units comprises an internal combustion engine with variable engine speeds and a generator, the method comprising:
(a) determining a given operating state of the internal combustion engine of at least one internal combustion engine-generator unit;
(b) deducting a range of operating states describing electric load override depending on the given operating state for the internal combustion engine of the at least one internal combustion engine-generator unit, with the determination of the given operating state and the deduction of the range of operating states occurring based on a calculation model for the internal combustion engine of the at least one internal combustion engine-generator unit; and
(c) providing a range of load requirements describing potential load requirements for the plurality of load consumers;
wherein step (c) is performed in a first superseding partial regulation, and steps (a) and (b) are performed in a second partial regulation.

2. A method according to claim 1 , wherein
(d) in consideration of the given operating state and the electric load override of the internal combustion engine of at least one internal combustion engine-generator unit:
the plurality of internal combustion engine-generator units is determined depending on a load requirement;
at least one of a variable load distribution and a variable distribution of engine speeds is determined for the plurality of internal combustion engines depending on the load requirement.

3. A method according to claim 1 , wherein when deducting the range of operating states, a permitted operating range of a generator of the internal combustion engine-generator unit is considered.

4. A method according to claim 2 , wherein step (d) is performed in the first superseding partial regulation.

5. A method according to claim 1 , wherein the first superseding partial regulation relates to the system and the second partial regulation relates to the internal combustion engine of the at least one internal combustion engine-generator unit.

6. A method according to claim 1 , wherein
the electric load override at a given operating state is characterized by at least two parameters describing a transient development of a power output.

7. A method according to claim 2 , further comprising:
e) comparing the electric load override with the variable load distribution depending on the scope of load requirements for the internal combustion engine, in the second partial regulation, the second partial regulation relating to the internal combustion engine of the at least one internal combustion engine-generator unit.

8. A method according to claim 2 , wherein
at least one of the variable load distribution and the distribution of engine speeds are subjected to a summary framework condition, with the sum of all energy load overrides of the internal combustion engines based on the calculation model for at least one internal combustion engine being greater than the scope of load requirements of the total of load consumers.

9. A method according to claim 6 , wherein
a scope of load requirements of the total of load consumer is determined by at least one of a sum of effective loads, a maximum of load leaps, and a superseding value of the load ramps.

10. A method according to claim 8 , wherein the summary framework condition is formed such that:
a sum of all power leaps that can be shown is greater than a maximum of power leaps of the total of load consumers; or
a sum of all individual power ramps that can be shown is greater than a superseding value of the load ramps.

11. A method according to claim 1 , wherein
the engine speed and the power of the internal combustion engine can be adjusted via the second partial regulation.

12. A method according to claim 1 , wherein
the calculation model is a thermo-dynamic model of the operating state of the internal combustion engine based upon a plurality of parameters, the plurality of parameters selected from a group comprising:
power output of the internal combustion engine,
engine speed of the internal combustion engine,
temperature of the internal combustion engine,
ambient temperature,
ambient pressure,
exhaust counter-pressure,
moment of inertia of the internal combustion engine-generator unit, and
specific fuel consumption.

13. A method according to claim 1 , wherein
a determination of a plurality of internal combustion engine-generator units occurs depending on the load requirement by comparing a total load of the consumers to the total power output of the internal combustion engines-generator units.

14. A method according to claim 1 , wherein an engine speed of the internal combustion engine and/or another parameter characterizing the operating state is changed:
if an amount of a variable load distribution allocated to the requested unit is outside the permitted range of operating states describing the electric load override of the internal combustion engine in reference to the given operating state, or
if another not yet optimized parameter of the calculation model is given.

15. A method according to claim 1 , further comprising providing an optimization strategy, for at least one of the first and second partial regulations, wherein a new operating state of the internal combustion engine is adjusted within a range of operating states.

16. A method according to claim 15 , wherein the range of operating states is deducted repeatedly for changes of the operating state, wherein at least one of the first partial regulation and the second partial regulation comprises a control circuit in which the range of operating states is repeatedly deducted.

17. A device; configured to control and regulate an internal combustion engine-generator system including a plurality of internal combustion engine-generator units configured to generate electric energy for a plurality of load consumers, wherein each of the plurality of internal combustion engine-generator units comprises an internal combustion engine with variable engine speeds and a generator, the device comprising:
a processor including a first superseding partial regulation and a second partial regulation, the processor configured to:
(a) determine a given operating state of the internal combustion engine of at least one internal combustion engine-generator unit;
(b) deduct an electric load override depending on a range of operating states describing the given operating state for the internal combustion engine of at least one internal combustion engine-generator unit, with the determination of the given operating state and the deduction of the range of operating states occurring based on a calculation model for the internal combustion engine; and
(c) provide a scope of load requirements describing potential load requirements of the plurality of load consumers;
wherein the second partial control relates to the internal combustion engine of the at least one internal combustion engine-generator unit and is configured to execute steps (a) and (b), and the first superseding partial control relates to the system and is configured to execute step (c).

18. A device for controlling and regulating according to claim 17 , wherein the processor is configured to:
(d) determine a

Assignees

• Filip Gerhard
• Schmalzing Claus-Oliver
• Thomas Hans-Juergen
• Kohl Tobias
• Mtu Friedrichshafen Gmbh

Inventors

• Filip Gerhard
• Schmalzing Claus-Oliver
• Thomas Hans-Juergen
• Kohl Tobias

Classifications

• F02B75/16

  Engines characterised by number of cylinders, e.g. single-cylinder engines (F02B75/26 takes precedence) · CPC title

• F02D25/00

  Controlling two or more co-operating engines · CPC title

• B60L50/13

  using AC generators and AC motors · CPC title

• F02D41/0205

  using an auxiliary engine speed control (engine speed control per se F02D31/00) · CPC title

• B63J3/00

  Driving of auxiliaries (transmission elements per se F16) · CPC title