System and method for economic dispatching of electrical power

• US 5,621,654 A
• Filed: 04/15/1994
• Issued: 04/15/1997
• Est. Priority Date: 04/15/1994
• Status: Expired due to Term

• Current Assignee: Jason M. Cohen
• Original Assignee: Long Island Lighting Company
• Inventors: Page, Douglas B., Cohen, Jason M.
• Primary Examiner(s): Cosimano, Edward R.
• Application Number:
  US08/228,225
• Time in Patent Office: 1,096 Days
• Field of Search: 73/112, 307/68, 364/156, 364/464.01, 364/464.04, 364/492, 364/493
• US Class Current: 700/287
• CPC Class Codes: F01K 13/02 Controlling, e.g. stopping or starting
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 3/0075 for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch

Abstract

The present invention relates to methods and systems for economically dispatching electrical power. The present invention utilizes real-time heat rates for a plurality of power generating units, e.g., steam turbines, and corresponding emission data for each unit, to dispatch electrical power at the lowest possible cost. The method of the present invention also compares the cost associated with generating power to the cost to purchase power from other electric utilities to achieve maximum cost savings associated with the dispatching of the electrical power.

Claims

1. A method for dispatching electrical power, comprising the steps of:

utilizing measuring means for measuring operating parameters for a plurality of power generating units to obtain real-time heat rate data for each of said plurality of power generating units, said measuring means including for each power generating unit at least one sensing device for measuring the operating parameters;

utilizing a central processor for polling each power generating unit for retrieving the measured operating parameters;

transferring said measured operating parameters to said central processor at regular intervals for calculating the real-time heat rate for each of said plurality of power generating units from said heat rate data;

obtaining load requirements for a geographical area;

determining configurations of said plurality of power generating units which satisfy the load requirements of a geographic area;

determining a cost of generating electrical power for each said configuration, said cost determination being based upon said real-time heat rate data;

obtaining a price for purchasing power;

comparing said cost determination for generating power with said price for purchasing power and selecting the lowest cost for the power generation; and

dispatching the electrical power during a real-time operation of said plurality of power generating units by selecting one of said configurations with the lowest power generating cost if said cost of generating electrical power is less than said price for purchasing power.

2. The method according to claim 1, wherein said step of measuring real-time heat rate data includes:

measuring a flow of at least one fuel source to each said plurality of power generating units; and

measuring a power output of a generator associated with each said plurality power generating units.

3. The method according to claim 1, wherein said step of calculating real-time heat rate for each of said plurality of power generating units occurs between about once every minute and about once every five minutes.

4. The method according to claim 1, wherein said step of measuring operating parameters includes measuring oil flow into each said plurality of power generating units.

5. The method according to claim 1, wherein said step of measuring operating parameters includes measuring gas flow into each said plurality of power generating units.

6. The method according to claim 1, wherein said step of measuring operating parameters includes measuring the gross power generated by each of said plurality of power generating units.

7. The method according to claim 1, wherein said step of measuring operation parameters includes measuring the power used by each of said plurality of power generating units.

8. The method according to claim 1, further comprising measuring emission data from said plurality of power generating units wherein said cost determination is further based on said emission data.

9. The method according to claim 8, wherein said step of measuring emission data occurs about once every ten seconds.

10. The method according to claim 8, wherein emission data includes a value of emission credits for producing power.

11. A method for dispatching electrical power, comprising the steps of:

utilizing measuring means for measuring operating parameters for a plurality of power generating units to obtain real-time heat rate data for each of said plurality of power generating units, said measuring means including for each power generating unit at least one sensing device for measuring operating parameters;

measuring emissions associated with each said plurality of power generating units to obtain emission data;

utilizing a central processor for polling each power generating unit for retrieving the measured operating parameters and measured emission data;

transferring said measured operating parameters to said central processor at regular intervals for calculating the real-time heat rate for each of said plurality of power generating units from said heat rate data;

obtaining load requirements for a geographical area;

determining configurations of power generating units which satisfy the load requirements;

determining a cost of generating electrical power for each said configuration, said cost determination being based upon said real-time heat rate data and said emission data; and

dispatching the electrical power during a real-time operation of said plurality of power generating units by selecting one of said configurations with the lowest power generating cost.

12. The method according to claim 11, wherein said step of calculating real-time heat rate for each of said plurality of power generating units occurs between about once every minute and once every five minutes.

13. The method according to claim 11, wherein said step of measuring emission data occurs about once every ten seconds.

14. A system for dispatching electrical power generated from remote locations, which comprises:

a plurality of power generating units each including a plurality of sensors for measuring operating parameters of each of said units; and

at least one processor configured to poll each power generating unit and to receive said measured operating parameters, to transfer said measured operating parameters to said processor, to calculate real-time heat rates for each configuration of said plurality of power generating units, and to dispatch electrical power in response to said real-time heat rates during a real-time operation of a select configuration of said plurality of power generating units corresponding to a lowest power generating cost.

15. The system according to claim 14, wherein said operating parameters include emission data associated with each of said plurality of power generating units, such that said at least one processor dispatches electrical power based on said emission data.

16. The system according to claim 15, wherein said emission data includes a value of emission credits for producing power.

17. The system according to claim 14, wherein said at least one processor includes at least one remote processor associated with said plurality of power generating units and a central processor, said at least one remote processor being connected to said central processor by a data communication network.

18. The system according to claim 17, wherein each of said plurality of power generating units includes a data acquisition interface connected to said plurality of sensors, said data acquisition interface being connected to said at least one remote processor by said data communication network.