METHOD OF OPERATING A STATIONARY ELECTRICAL POWER PLANT CONNECTED TO A POWER SUPPLY NETWORK

• US 20150109021A1
• Filed: 10/22/2014
• Published: 04/23/2015
• Est. Priority Date: 10/23/2013
• Status: Active Grant

• Current Assignee: INNIO Jenbacher GmbH & Co.,OG.
• Original Assignee: GE Jenbacher GmbH & Company OHG (General Electric Company)
• Inventors: KRUCKENHAUSER, Erich, GOMEZ, Jose
• Granted Patent: US 9,739,839 B2
• Time in Patent Office: Days
• US Class Current: 324/764.01
• CPC Class Codes: F02D 29/06 peculiar to engines driving electric generators
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: G01R 31/52 Testing for short-circuits, leakage current or ground faults
• CPC Class Codes: G05B 23/0259 characterized by the response to fault detection
• CPC Class Codes: G05B 23/0283 Predictive maintenance, e.g. involving the monitoring of a system and, based on the monitoring results, taking decisions on the maintenance schedule of the monitored system; Estimating remaining useful life [RUL] preventive maintenance, i.e. planning maintenance according to the available resources without monitoring the system G06Q10/06
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y04S 10/12 Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation

Abstract

A method of operating a stationary power plant connected to a power supply network, wherein upon the occurrence of a dynamic network fault in the power supply network, in particular an electric short-circuit, at least one fault value is ascertained in dependence on a state value of at least one operating parameter of the power plant wherein the at least one fault value is associated with at least one component of the power plant, wherein a maintenance signal for the at least one component of the power plant is output in dependence on the at least one fault value.

Claims

1. A method of operating a stationary power plant connected to a power supply network, wherein upon the occurrence of a dynamic network fault in the power supply network, in particular an electric short-circuit, at least one fault value is ascertained in dependence on a state value of at least one operating parameter of the power plant wherein the at least one fault value is associated with at least one component of the power plant, wherein a maintenance signal for the at least one component of the power plant is output in dependence on the at least one fault value.

2. A method as set forth in claim 1, wherein the power supply network is a public grid.

3. A method as set forth in claim 1, wherein the power supply network is an island network.

4. A method as set forth in claim 1, wherein to ascertain the at least one fault value the state value of the at least one operating parameter of the power plant is ascertained prior to the network fault and/or during the network fault and/or after the network fault.

5. A method as set forth in claim 1, wherein the fault value is ascertained in dependence on the state value of the at least one operating parameter and at least one predeterminable reference value.

6. A method as set forth in claim 1, wherein the power plant includes at least one of the following components:

an electric generator connected to the power supply network, an internal combustion engine connected to the generator, a coupling device for connecting a rotatably mounted generator shaft of the generator to a rotatably mounted engine shaft of the internal combustion engine, wherein at least one fault value is ascertained in dependence on a state value of at least one operating parameter of the generator and/or the internal combustion engine and/or the coupling device and is associated with at least one component of the power plant.

7. A method as set forth in claim 6, wherein at least one of the following state values of operating parameters of the power plant is ascertained:

the occurrence of a delay in the ignition time of the internal combustion engine, the occurrence of an interruption in combustion of the internal combustion engine, the duration of an interruption in combustion of the internal combustion engine, the occurrence of a throttling of a turbocharger of the internal combustion engine, the duration of a throttling of the turbocharger of the internal combustion engine, the level of the torque at the generator shaft of the generator, the level of the torque at the coupling device, the level of the torque at the engine shaft of the internal combustion engine, the level of the electric voltage of the generator, the occurrence of a voltage drop at the generator, the duration of a voltage drop at the generator, the level of the electric current of the generator, the occurrence of an increase in current strength of the generator, the duration of an increase in current strength of the generator, the level of the electrical active power delivered by the generator to the power supply network, the level of the rotary speed of the generator shaft of the generator, the level of the rotary speed of the coupling device, the level of the rotary speed of the engine shaft of the internal combustion engine, the level of the load angle of the generator, the level of the load angle of the generator after elimination of the network fault, the level of the exciter current of the generator and the duration of a given exciter current strength of the generator.

8. A method as set forth in claim 1, wherein a plurality of fault values is ascertained.

9. A method as set forth in claim 1, wherein a degree of severity of the network fault is ascertained and/or output in dependence on the at least one fault value.

10. A method as set forth in claim 9, wherein a maintenance signal for at least one component of the power plant, preferably for the generator and/or the internal combustion engine, and/or the coupling device is output in dependence on at least one fault value and/or the degree of severity of the network fault.

11. A method as set forth in claim 1, wherein a respective fault value has one of at least two possible values, wherein preferably the at least two possible values are 0 and 1.

12. A method as set forth in claim 11, wherein the at least one maintenance signal is output in dependence on the value of at least one fault value.

13. A method as set forth in claim 11, wherein a degree of severity of the network fault is ascertained and output in dependence on the number of fault values of a predeterminable value, wherein preferably the predeterminable value is 1.