System and method for transmitting measurement signals in spatially extensive supply networks

• US 9,693,120 B2
• Filed: 10/29/2012
• Issued: 06/27/2017
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Schweiz AG (ABB Limited)
• Inventors: Blank, Frederik, Gauder, Markus, Schmidt, Werner A., Lauxtermann, Stefan
• Primary Examiner(s): Lau, Tung
• Application Number:
  US13/662,818
• Publication Number:
  US 20130054174A1
• Time in Patent Office: 1,702 Days
• CPC Class Codes: G08C 2201/10 Power supply of remote control devices
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/86 Performing a diagnostic of the sensing device
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

Exemplary systems and methods for monitoring a current state of a spatially extensive supply network having at least one control station that monitors and controls the supply network and a plurality of sensors that transmit measurement values relating to operating behavior to the at least one control station. Current measurement values are measured at positions on the supply network corresponding to each sensor. Each sensor analyzes measured signal variations and signal trends of the measured current values via an evaluating unit. The measurement values of each respective sensor are transmitted to the at least one control station in data packets at a defined time. At each respective sensor, when the analysis detects an abnormal measurement signal variation, a frequency of transmission of the respective sensor and each adjacent sensor is increased, the respective sensor transmitting the measurement values to the at least one control station or to adjacent sensors to which the respective sensor is connected to through a common supply line and which measure an identical or physically similar quantity.

Claims

1. A system for monitoring a current state of a spatially extensive supply network, comprising:

at least one control station that monitors and controls the spatially extensive supply network; and

a plurality of sensors for transmitting current measurement values relating to an operating behavior to the at least one control station over the spatially extensive supply network,

wherein each sensor is located at respective positions in the spatially extensive supply network for locally determining the current measurement values, and includes an evaluating unit that analyzes measured signal variations and trends, wherein in order to transmit respective measurement values to the at least one control station, each sensor includes a data transmission unit which dynamically sets a frequency of transmission for the data in packets based on a classification of the measured signal variations, where each classification is associated with a specified transmission frequency,

wherein when a respective sensor detects a measurement signal variation, the respective sensor increases and subsequently reduces the frequency of transmission of the respective sensor and of each adjacent sensor, wherein the respective sensor transmits the measurement values to the at least one control station and wherein adjacent sensors are sensors that are spaced at a distance from the respective sensor and are connected to the respective sensor by a common supply line and which measure a quantity that is identical to the current measurement values determined by the respective sensor, and

wherein the control station is further to configure the supply network to control at least one of the adjacent sensors to be active, how long the at least one adjacent sensor is active, a frequency of transmission for the at least one active adjacent sensor, and for which disturbances the at least one active adjacent sensor is to evaluate.

2. The system as claimed in claim 1, wherein the respective sensor allocates signal variations to different classes of signal states in dependence on a result of the evaluation.

3. The system as claimed in claim 1, wherein the respective sensor:

models relationships between the positions of each sensor and the supply network to establish an intelligent sensor network; and

wherein to increase the frequency of transmission of each adjacent sensor comprises to identify, by the respective sensor, each adjacent sensor from the modeled relationship.

4. The system as claimed in claim 1, wherein each sensor synchronizes with one another directly or via the at least one control station, wherein each sensor transmits when adjacent sensors are not transmitting.

5. The system as claimed in claim 2, wherein each sensor synchronizes with one another directly or via the at least one control station wherein each sensor transmits when adjacent sensors are not transmitting.

6. The system as claimed in claim 1, wherein each sensor includes memory that stores the measured values and from which the stored signals are dispatched or called up in compressed form after a defined time.

7. The system as claimed in claim 1, wherein at least a part of each sensor includes a signal transmitter and a signal receiver which allow bidirectional communication.

8. The system as claimed in claim 2, wherein the respective sensor reduces the frequency of transmission of a signal when the signals measured by the sensor diagnose a measurement signal variation that is normal within the context of regular operation.

9. The system as claimed in claim 2, wherein each sensor synchronizes with one another directly or via the at least one control station wherein each sensor transmits when adjacent sensors are not transmitting.

10. The system as claimed in claim 3, wherein at least one of the at least one control station and the evaluating unit of the respective sensor stores the modeled relationship.

11. The system as claimed in claim 2, wherein the at least one control station includes a decision support system that receives the determined classification information and the transmitted signal from each sensor.

12. The system as claimed in claim 11, wherein the decision support system is an alarm system that analyzes each signal individually.

13. The system as claimed in claim 11, wherein the decision support system is configured to analyze a status of the supply network in its entirety and propose actions to operators in accordance with signal measurement values, individual system states, information items obtained from the system, and learned expert knowledge.

14. The system as claimed in claim 11, wherein the decision support system generates work orders.

15. The system as claimed in claim 13, wherein the decision support system receives and processes fault and diagnostic information items and status information items transmitted by each sensor.

16. The system as claimed in claim 14, wherein each sensor has a signal preprocessing and diagnostic unit that detects and classifies erroneous signal states from the measured signals and monitors a state of a respective sensor and a state of a component connected to the respective sensor.

17. The system as claimed in claim 16, wherein the component includes a battery.

18. The system as claimed in claim 17, wherein in order to conserve battery charge, each sensor is configured to set the frequency of transmission based additionally on a respective utilization of battery capacity and in dependence on a respective battery capacity.

19. A method for monitoring a current state of a spatially extensive supply network having at least one control station for monitoring and controlling the spatially extensive supply network and a plurality of sensors for transmitting measurement values relating to operating behavior to the at least one control station, the method comprising:

measuring current measurement values at positions on the spatially extensive supply network corresponding to each sensor;

analyzing measured signal variations and signal trends of the measured current values via an evaluating unit of each respective sensor; and

transmitting respective measurement values in data packets from each respective sensor to the at least one control station at a frequency of transmission set based on a classification of the analyzed measured signal variations, the classification being associated with a specified transmission frequency,

wherein when the analysis detects a measurement signal variation, increasing and subsequently reducing, by the respective sensor, the frequency of transmission of the respective sensor and of each adjacent sensor, the respective sensor transmitting the measurement values to the at least one control station and wherein adjacent sensors are sensors that are spaced at a distance from the respective sensor and are connected to the respective sensor through a common supply line and which measure a quantity that is identical to the current measurement values measured by the respective sensor, and

wherein each sensor defines classification features and classification limits such that a frequent measurement signal transmission due to faulty classification is avoided and the battery life of a respective sensor is significantly increased.

20. The method as claimed in claim 19, wherein when an alarm generated by a respective sensor is recognized and acknowledged by the operator at the at least one control station, the at least one control station sends an acknowledgement to the respective sensor, and

wherein the respective sensor reduces a frequency of transmitting a signal to save energy.

21. The method as claimed in claim 19, wherein the transmission of respective measured values is a wireless transmission.

22. A non-transitory computer readable medium having program code recorded thereon, which, when in communicable contact with a processor, causes the processor to execute a method for monitoring a current state of a spatially extensive supply network having at least one control station for monitoring and controlling the spatially extensive supply network and a plurality of sensors for transmitting measurement values relating to operating behavior to the at least one control station, each sensor having a respective processor, the method comprising:

measuring current measurement values at positions on the spatially extensive supply network corresponding to each sensor;

analyzing measured signal variations and signal trends of the measured current values via an evaluating unit of each respective sensor; and

transmitting, respective measurement values in data packets from each respective sensor to the at least one control station at a frequency of transmission set based on a classification of the analyzed measured signal variations, wherein each classification is associated with a specified transmission frequency,

wherein when the analysis detects a measurement signal variation, increasing and subsequently reducing, by the respective sensor, a frequency of transmission of the respective sensor and of each adjacent sensor, the respective sensor transmitting the measurement values to the at least one control station and wherein adjacent sensors are sensors that are spaced at a distance from the respective sensor and are connected to the respective sensor through a common supply line and which measure a quantity that is identical to the current measurement values measured by the respective sensor, and

wherein each sensor defines classification features and classification limits such that a frequent measurement signal transmission due to faulty classification is avoided and the battery life of a respective sensor is significantly increased.