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Title: 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:
 [1]
  1. (Delmar, NY)
Issue Date:
Research Org.:
MIDWEST RESEARCH INSTITUTE
OSTI Identifier:
875144
Patent Number(s):
6542791
Application Number:
09/523,682
Assignee:
The Research Foundation of State University of New York (Albany, NY) NREL
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. Tue . "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 = {2003},
month = {4}
}

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