Load controller and method to enhance effective capacity of a photovotaic power supply using a dynamically determined expected peak loading
Abstract
A load controller and method are provided for maximizing effective capacity of a non-controllable, renewable power supply coupled to a variable electrical load also coupled to a conventional power grid. Effective capacity is enhanced by monitoring power output of the renewable supply and loading, and comparing the loading against the power output and a load adjustment threshold determined from an expected peak loading. A value for a load adjustment parameter is calculated by subtracting the renewable supply output and the load adjustment parameter from the current load. This value is then employed to control the variable load in an amount proportional to the value of the load control parameter when the parameter is within a predefined range. By so controlling the load, the effective capacity of the non-controllable, renewable power supply is increased without any attempt at operational feedback control of the renewable supply. The expected peak loading of the variable load can be dynamically determined within a defined time interval with reference to variations in the variable load.
- Inventors:
-
- Delmar, NY
- Issue Date:
- Research Org.:
- Midwest Research Institute, Kansas City, MO (United States)
- OSTI Identifier:
- 875144
- Patent Number(s):
- 6542791
- Application Number:
- 09/523,682
- Assignee:
- The Research Foundation of State University of New York (Albany, NY)
- Patent Classifications (CPCs):
-
G - PHYSICS G05 - CONTROLLING G05F - SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER
- DOE Contract Number:
- AC36-98GO10337; XAD-8-17671-01
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- load; controller; method; enhance; effective; capacity; photovotaic; power; supply; dynamically; determined; expected; peak; loading; provided; maximizing; non-controllable; renewable; coupled; variable; electrical; conventional; grid; enhanced; monitoring; output; comparing; adjustment; threshold; value; parameter; calculated; subtracting; current; employed; control; amount; proportional; predefined; range; controlling; increased; attempt; operational; feedback; defined; time; interval; reference; variations; power supply; power output; feedback control; /700/307/323/
Citation Formats
Perez, Richard. Load controller and method to enhance effective capacity of a photovotaic power supply using a dynamically determined expected peak loading. United States: N. p., 2003.
Web.
Perez, Richard. Load controller and method to enhance effective capacity of a photovotaic power supply using a dynamically determined expected peak loading. United States.
Perez, Richard. Wed .
"Load controller and method to enhance effective capacity of a photovotaic power supply using a dynamically determined expected peak loading". United States. https://www.osti.gov/servlets/purl/875144.
@article{osti_875144,
title = {Load controller and method to enhance effective capacity of a photovotaic power supply using a dynamically determined expected peak loading},
author = {Perez, Richard},
abstractNote = {A load controller and method are provided for maximizing effective capacity of a non-controllable, renewable power supply coupled to a variable electrical load also coupled to a conventional power grid. Effective capacity is enhanced by monitoring power output of the renewable supply and loading, and comparing the loading against the power output and a load adjustment threshold determined from an expected peak loading. A value for a load adjustment parameter is calculated by subtracting the renewable supply output and the load adjustment parameter from the current load. This value is then employed to control the variable load in an amount proportional to the value of the load control parameter when the parameter is within a predefined range. By so controlling the load, the effective capacity of the non-controllable, renewable power supply is increased without any attempt at operational feedback control of the renewable supply. The expected peak loading of the variable load can be dynamically determined within a defined time interval with reference to variations in the variable load.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 2003},
month = {Wed Jan 01 00:00:00 EST 2003}
}
Works referenced in this record:
Assessing the load matching capability of photovoltaics for US utilities based upon satellite-derived insolation data
conference, January 1993
- Perez, R.; Seals, R.; Stewart, R.
- Conference Record of the Twenty Third IEEE Photovoltaic Specialists Conference - 1993 (Cat. No.93CH3283-9)