ELECTRICAL POWER DISTRIBUTION SYSTEMS, SMART ELECTRICITY METERS, AND METHODS OF CONTROLLING LOCAL POWER CONNECTION

• US 20130123998A1
• Filed: 11/13/2012
• Published: 05/16/2013
• Est. Priority Date: 11/14/2011
• Status: Abandoned Application

• Current Assignee: Emeter (Siemens AG)
• Original Assignee: Emeter (Siemens AG)
• Inventors: King, Christopher Slaboszewicz, Johnson, Larsh Maur
• Application Number:
  US13/675,137
• Publication Number:
  US 20130123998A1
• Time in Patent Office: Days
• US Class Current: 700/292
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: G01R 22/10 using digital techniques
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: H02H 3/24 responsive to undervoltage or no-voltage H02H3/207 takes precedence
• CPC Class Codes: H02H 3/46 responsive to frequency deviations
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00006 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 13/0004 involved in a protection system
• CPC Class Codes: H02J 2310/16 The load or loads being an Information and Communication Technology [ICT] facility
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

An electrical power distribution system having an electricity meter connected to power lines on one side and a load on the other side, the electricity meter enabling automatic disconnection and/or reconnection as determined by one or more thresholds stored in memory of the electricity meter. Electricity meters having an automatic disconnect feature are disclosed as are methods of connecting the electrical power distribution system. Other aspects are disclosed.

Claims

1. An electrical power distribution system, comprising:

an electricity meter connected to power lines on one side and an electrical load on the other side, the electricity meter having a meter housing, and a processor, memory, a communications module, a sensor, and a service disconnect switch within the meter housing; and

a communication and control system configured to communicate with the electricity meter and operational to communicate one or more thresholds to the electricity meter, and

wherein the electricity meter is operable, when conditions established by the one or more thresholds are not met, to open the service disconnect switch and automatically disconnect the electrical load.

2. The electrical power distribution system of claim 1, wherein the communication and control system comprises:

a communications network adapted to send a communication signal to the electricity meter and receive a communication signal from the electricity meter;

a communications server connected to the communications network to manage information or data sent over the network;

a controls server for initiating control commands and other information to be sent to the electricity meter; and

a database device having a database configured to store information about the electricity meter, the database storing the one or more thresholds to be programmed into the electricity meter, and

wherein the controls server automatically synchronizes the one or more thresholds between the database and the memory of the electricity meter by initiating a sending of the communication signals over the communications network.

3. The electrical power distribution system of claim 1, wherein the service disconnect switch is operable to automatically reconnect the electrical load when a measured parameter delivered by the power lines meets the conditions established by the one or more thresholds stored in the memory.

4. The electrical power distribution system of claim 1, wherein the one or more thresholds comprises one or more current thresholds, one or more voltage thresholds, or one or more power threshold.

5. The electrical power distribution system of claim 1, wherein the one or more thresholds comprises one or more frequency thresholds.

6. The electrical power distribution system of claim 1, wherein the one or more thresholds comprises one or more current bounds and when a current delivered by the power lines and sensed by the sensor falls outside of the conditions established by the one or more current bounds stored in the memory, the automated disconnection is initiated.

7. The electrical power distribution system of claim 1, wherein the one or more thresholds comprise a voltage threshold and when the measured voltage delivered by the power lines and sensed by the sensor drops below the voltage threshold stored in the memory, the automated disconnection is initiated.

8. The electrical power distribution system of claim 1, wherein the one or more thresholds comprises one or more voltage bounds, and when the voltage delivered by the power lines and sensed by the sensor meets the conditions set by the voltage bounds stored in the memory, an automated reconnection is initiated.

9. The electrical power distribution system of claim 1, wherein the electricity meter is operable to initiate the automatic disconnection of the electrical load when a measured frequency of the power lines is above an upper frequency bound or below a lower frequency bound comprising the one or more thresholds stored in the memory.

10. The electrical power distribution system of claim 1 wherein the electricity meter is operable to reconnect the electrical load when a measured frequency delivered by the power lines returns between an upper frequency bound and lower frequency bound comprising the one or more thresholds stored in the memory.

11. The electrical power distribution system of claim 1, comprising:

a database of the communications and controls system adapted to store the one or more thresholds comprising at least one frequency bound used for automatic disconnection or reconnection,

a communications network, and

a controls server operational to automatically synchronize the one or more threshold values between the database and the memory by sending communication signals over the communications network.

12. The electrical power distribution system of claim 1, wherein the communication and controls system comprises:

a database configured to store the one or more thresholds; and

a controls server that is operable to synchronize the one or more thresholds between the database and the memory.

13. The electrical power distribution system of claim 1, wherein the communication and controls system comprises:

a database device having a database adapted to store the one or more thresholds used for the automatic disconnection or reconnection;

a communications network; and

a controls server that is operable to automatically synchronize the one or more thresholds between the database and the memory by sending communication signals over the communications network.

14. The electrical power distribution system of claim 1, wherein a database device of the communication and control system stores information about other devices connected to the load side of the electricity meter.

15. The electrical power distribution system of claim 1, wherein a controls server of the communication and control system is operable to receive a status of the electrical distribution system from a distribution management server.

16. The electrical power distribution system of claim 1, comprising a customer-site electric generator connectable to the electrical load.

17. The electrical power distribution system of claim 16, wherein a communications server of the communication and control system communicates with the customer-site electric generator connectable to the load side of the electricity meter via a communications network for sending communication signals to the customer-site electric generator and receiving communication signals from the customer-site electric generator.

18. The electrical power distribution system of claim 16, wherein the customer-site electric generator is connectable to the electrical load via a generator disconnect switch that can disconnect or connect the electrical load upon receipt of a control signal from either:

the electricity meter, or

a router that is coupled to a generator communications module of the customer-site electrical generator.

19. The electrical power distribution system of claim 18, wherein the control signal comprises a connect control signal that is sent from the electricity meter to the generator communications module of the customer-site electrical generator to connect the customer-site electrical generator when a current delivered by the power lines and measured by the sensor do not meet the established conditions that are set by the one or more thresholds stored in the memory.

20. The electrical power distribution system of claim 18, wherein the control signal comprises a disconnect control signal that is sent from the electricity meter to the generator communications module of the customer-site electrical generator to disconnect the customer-site electrical generator when a current delivered by the power lines and measured by the sensor meets the conditions specified by the one or more threshold stored in the memory.

21. The electrical power distribution system of claim 18 wherein the control signal comprises a connect control signal sent from the electricity meter to the generator communications module of the customer-site electrical generator to connect the customer-site electrical generator when a voltage delivered by the power lines and measured by the sensor fails to meet the conditions specified by the one or more threshold stored in the memory.

22. The electrical power distribution system of claim 18 wherein the control signal comprises a disconnect control signal sent from the electricity meter to the generator communications module of the customer-site electrical generator to disconnect the customer-site electrical generator when a voltage delivered by the power lines and measured by the sensor meets the conditions specified by the one or more threshold stored in the memory.

23. The electrical power distribution system of claim 18, wherein the control signal comprises a connect control signal sent from the electricity meter to a generator communications module of the customer-site electric generator to connect the customer-site electric generator when a frequency delivered by the power line fails to meet conditions set by the one or more thresholds stored in memory.

24. The electrical power distribution system of claim 18, the control signal comprises a disconnect control signal sent from the electricity meter to a generator communications module of the customer-site electric generator to disconnect the customer-site electric generator when a frequency delivered by the power line meets conditions set by the one or more thresholds stored in memory.

25. The electrical power distribution system of claim 1, comprising a customer-site electric storage device connectable to the electrical load.

26. The electrical power distribution system of claim 25, wherein a communications server of the communication and control system communicates with the customer-site electric storage device connectable to the load side of the electricity meter via a communications network for sending communication signals to the customer-site electric storage device and receiving communication signals from the customer-site electric storage device.

27. The electrical power distribution system of claim 25 wherein the customer-site electric storage device is connected to the electrical load via a secondary disconnect switch that can disconnect or reconnect the load upon receipt by a secondary communications module of a control signal from:

the electricity meter, or

a router that is connected to the secondary communications module.

28. The electrical power distribution system of claim 27, wherein the control signal comprises a disconnect control signal sent from the electricity meter to the secondary communications module of the customer-site electric storage device to disconnect the customer-site electric storage device when a current delivered by the power lines and measured by the sensor meets conditions established by the one or more thresholds stored in the memory.

29. The electrical power distribution system of claim 27, wherein the control signal comprises a connect control signal sent from the electricity meter to the secondary communications module of the customer-site electric storage device to connect the customer-site electric storage device when a current delivered by the power line and measured by the sensor fails to meet the conditions established by the one or more thresholds stored in the memory.

30. An electrical power distribution system, comprising:

an electricity meter connected to power lines on one side and an electrical load on the other side, the electricity meter having a meter housing, and a processor, memory, a communications module, a sensor, and a service disconnect switch contained within the meter housing;

a communications network adapted to send a communication signal to the electricity meter and receive a communication signal from the electricity meter;

a communications server connected to the communications network to manage messages sent over the communications network;

a controls server for initiating control commands and other information to be sent to the electricity meter,

a distribution management server adapted to provide status of the electrical power distribution system to the controls server; and

a database device having a database adapted to store information about the electricity meter and other devices connected to the load side of the electricity meter, the database storing one or more thresholds programmed into each electricity meter for use in automatic disconnection

wherein the controls computer is operable to automatically synchronizes the one or more threshold values between the database and the memory of the electricity meter by sending messages over the communications network, and

wherein the second computer server is connected to one or more electrical generation or storage devices connected to the load side of the meter via a communications network for sending information and control signals to the generation or storage device and receiving information from the generation or storage device.

31. An electricity meter, comprising:

a meter housing containing

a communications module configured to receive one or more thresholds;

a memory adapted to store the one or more thresholds;

a sensor adapted to measure a parameter of the power lines;

a processor adapted to compare the parameter or a value derived therefrom to the one or more thresholds; and

a service disconnect switch automatically operable to open if the parameter or the value derived therefrom fails to meet conditions established by the one or more thresholds.

32. A method of controlling electricity power connection, comprising:

providing an electricity meter having

a meter housing containing,

a communications module configured to receive one or more thresholds,

a memory adapted to store the one or more thresholds,

a sensor adapted to measure a parameter of the power lines,

a processor adapted to compare the parameter or a value derived therefrom to the one or more thresholds, and

a service disconnect switch; and

automatically opening the service disconnect switch if the parameter or the value derived therefrom fails to meet conditions established by the one or more thresholds.