Power Flow Simulation System, Method and Device

• US 20120022713A1
• Filed: 01/12/2011
• Published: 01/26/2012
• Est. Priority Date: 01/14/2010
• Status: Abandoned Application

• Current Assignee: S&C Electric Company
• Original Assignee: S&C Electric Company
• Inventors: Deaver, Brian J. Sr., Parikh, Parag A.
• Application Number:
  US13/005,410
• Publication Number:
  US 20120022713A1
• Time in Patent Office: Days
• US Class Current: 700/298
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

Embodiments of the present invention provide power flow analysis and may process electrical power distribution system data in real time to calculate load, current, voltage, losses, fault current and other data. The power flow analysis system may include a detailed data model of the electrical power distribution system, and may accept a variety of real time measurement inputs to support its modeling calculations. The power flow analysis system may calculate data of each of the three distribution system power phases independently and include a distribution state estimation module which allows it to incorporate a variety of real time measurements with varying degrees of accuracy, reliability and latency.

Claims

1. A method of processing data of a power distribution network that includes a plurality of utility network elements comprising one or more capacitor banks, and a substation voltage regulating device, comprising:

obtaining actual data that comprises;

(a) real time measurement data of measurements of one or more parameters taken by a plurality of sensors distributed throughout the power distribution system;

(b) data of a configuration of each of the one or more capacitor banks;

(c) data of an output of the substation voltage regulating device; and

(d) data of the interconnectivity of a multitude of the utility network elements of the power distribution system;

receiving first simulated data that comprises data of a potential configuration of a first utility network element in a configuration other than the actual configuration in which the first utility network element is presently operating;

processing the actual data and the first simulated data to determine a first set of output data;

wherein the first set of output data includes data of a current and a voltage at a multitude of the utility network elements of the power distribution network;

outputting at least some of the first set of output data.

2. The method according to claim 1, wherein measurement data of the one or more parameters is not available for a plurality of locations of the power distribution network, the method further comprising:

estimating a value for the one or more parameters for each of a multitude of the plurality of location.

3. The method according to claim 1, wherein the first simulated data is received from a software application configured to regulate a voltage of the power distribution network.

4. The method according to claim 1, wherein the first simulated data is received from a software application configured to reduce VARs of the power distribution network.

5. The method according to claim 1, wherein the first utility network element comprises a capacitor bank.

6. The method according to claim 1, wherein a multitude of the plurality of sensors are co-located with a multitude of electric utility meters and provide data of voltage measurements.

7. The method according to claim 1, wherein the actual data further comprises data of the configuration of one or more switches.

8. The method according to claim 7, wherein the actual data further comprises real time data of the output voltage of a voltage regulator that is located remote from the substation voltage regulating device.

9. The method according to claim 1, further comprising:

receiving second simulated data that comprises data of a potential configuration of a second utility network element in a configuration other than the actual configuration in which the second utility network element is presently operating;

processing the actual data and the second simulated data to determine a second set of output data;

wherein the second set of output data includes data of a current and a voltage at the multitude of utility network elements; and

determining whether the first set of output data or the second set of output data more closely satisfies a power distribution profile.

11. The method according to claim 1, wherein said processing comprises using a Ybus Gauss-Seidel algorithm.

10. The method according to claim 10, further comprising:

determining that the first set of output data more closely satisfies the power distribution profile than the second set of output data; and

based on said determining that the first set of output data more closely satisfies the power distribution profile than the second set of output data, transmitting a control message to the first utility network element to cause the first utility network element to transition to the potential configuration of the first simulated data.

12. A computer system for processing data of a power distribution network that includes a plurality of utility network elements, comprising:

a memory storing actual data that comprises;

(a) measurement data of measurements of a parameter taken by a plurality of sensors distributed throughout the power distribution system;

(b) configuration data that comprises data of a configuration of each of a multitude of the utility network elements; and

(c) interconnectivity data that comprises data of the interconnectivity of the multitude of utility network elements of the power distribution system;

a state estimator application configured to provide estimated data for the parameter at one or more locations on the power distribution network for which no measurement data is available;

a power flow simulation application configured to receive an input from said state estimator application;

said power flow simulation application being configured to receive first simulated data that comprises data of a first utility network element in a first configuration other than the actual configuration in which the first utility network element is presently operating;

said power flow simulation application being configured to access the measurement data, the configuration data, and the interconnectivity data in the memory;

said power flow simulation application being configured to process the input from the state estimator application, the measurement data, the configuration data, the interconnectivity data, and the first simulated data to output a first set of output data; and

wherein the set of output data includes data of a voltage at a group of utility network elements of the power distribution network.

13. The computer system of claim 12, wherein said state estimator application is configured to identify measurement data that is inaccurate.

14. The computer system of claim 12, further comprising:

said power flow simulation application being configured to receive second simulated data that comprises data of a second utility network element in a second configuration other than the actual configuration in which the second utility network element is presently operating;

said power flow simulation application being configured to process the input from the state estimator application, the measurement data, the configuration data, the interconnectivity data, and the second simulated data to output a second set of output data; and

wherein the second set of output data includes data of a voltage at the group of utility network elements of the power distribution network; and

a processing application configured to determine whether the first set of output data or the second set of output data more closely satisfies a power distribution profile.

15. The computer system of claim 14, further comprising:

a control application configured to transmit a control message to the first utility network element to cause the first utility network element to transition to the first configuration of the first simulated data in response to said processing application determining that the first set of output data more closely satisfies the power distribution profile.

16. The computer system to claim 12, wherein said power flow simulation application is configured to process at least some of the data using a Ybus Gauss-Seidel algorithm.

17. The computer system to claim 12, wherein said power flow simulation application is configured to receive simulated parameter data and to process the input from the state estimator application, the measurement data, the configuration data, the interconnectivity data, and the simulated parameter data to output a set of configuration data for one or more utility network elements;

and

wherein the set of configuration data for one or more utility network elements causes a model of the power distribution system generated by the power flow application to satisfy a similarity threshold with the simulated parameter data.

18. A method processing data, implemented at least in part by a computer system, of a power distribution network having a plurality of utility network elements, comprising:

storing in a memory data of the infrastructure of the power distribution network including;

configuration data identifying a configuration of one or more switches, and

interconnectivity data identifying the interconnectivity of the utility network elements;

receiving real time data of measurements of one or more power parameters taken at a group of the utility network elements;

wherein at least one power parameter measured comprises voltage;

processing the real time data, configuration data, and interconnectivity data to provide a first model that represents a first configuration of the distribution network wherein the plurality of switches have a first configuration;

processing the real time data, state data, and interconnectivity data to provide a second model that represents a second configuration of the distribution network wherein at least one of the switches has a second state; and

determining which of the first model and the second model more closely satisfies a predetermined power distribution profile.

19. The method according to claim 18, further comprising transmitting one or more control messages to one or more network elements in order to configure the distribution network according to the second configuration.

20. The method according to claim 18, wherein the first model comprises data of estimates of one or more power parameters at a plurality of points on the distribution network.

21. The method according to claim 18, further comprising estimating a voltage at one or more location using a state estimator that processes data from a plurality of other locations.

22. A method, implemented at least in part by a computer system, of power flow analysis for a power distribution system that includes a plurality of utility network elements, comprising:

obtaining power distribution system data, comprising

(a) data of the topology of the power distribution system and

(b) data of the present operating configuration of a plurality of utility network elements;

obtaining measurement data, comprising current data and voltage data;

receiving first simulated data that comprises data of a potential configuration of a first utility network element in a configuration other than the actual configuration in which the first utility network element is presently operating;

processing the power distribution system data, the measurement data, and the first simulated data to provide a first power flow simulation that comprises first estimated data of a voltage and a current at a plurality of locations of the power distribution system; and

outputting data of the first power flow simulation.

23. The method of claim 22, further comprising comparing at least some of the first estimated data with a threshold;

and

outputting a notification upon determining that the first estimated data is beyond the threshold.

24. The method of claim 22, wherein the first power flow simulation further comprises estimated data of a VARs at a plurality of locations.

25. The method according to claim 22, wherein measurement data is not available for a plurality of locations of the power distribution network, the method further comprising:

estimating a value for a voltage for each of a group of the plurality of locations at which measurement data is not available.

26. The method according to claim 22, wherein the voltage data comprises real time voltage data.

27. The method according to claim 22, further comprising:

receiving second simulated data that comprises data of a potential configuration of a second utility network element in a configuration other than the actual configuration in which the second utility network element is presently operating;

processing the power distribution system data, the measurement data, and the second simulated data to provide a second power flow simulation that comprises second estimated data of a voltage and a current at the plurality of locations of the power distribution system; and

determining that the first estimated data more closely satisfies a power distribution profile than the second estimated data.

28. The method according to claim 27, further comprising:

based on said determining that the first estimated data more closely satisfies a power distribution profile than the second estimated data, transmitting a control message to the first utility network element to cause the first utility network element to transition to the potential configuration of the first simulated data.

29. The method according to claim 22, wherein said processing comprises using a Ybus Gauss-Seidel algorithm.