US 10,855,078 B2Granted

Electrical power transmission

OwnerGlenn Kenton Rosendahlinventor

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Abstract

Management of an electrical power transmission network is obtained by providing at each subscriber premises a power correction system for applying a switched reactor for voltage correction across the input voltage and a sensing system defined by a pair of meters one at the supply and the second downstream of the voltage correction for detecting variations in power factor. The system includes an arrangement for balancing loads between a first phase on a first BUS and a second phase on a second BUS by calculating a required correction current by adding load currents from the first and second phases. In addition an arrangement is provided when a load is switched on and off power is supplied by or supplied to a battery for a short time and this power is reduced over a time period substantially matching or greater than said natural time constant of the power supply system.

Claims8

Dependent claims

A load control device for use in an electrical power transmission network where the network comprises:

a plurality of subscriber premises for receiving electrical power from a power supply system;
where the power supply system has a natural time constant of a response time of the power supply system;
each of the subscriber premises including a plurality of user devices on a power supply circuit;
transmission lines supplying electrical power from the power supply system to a respective power supply inlet of each of the subscriber premises;
the load control device being arranged for controlling the power supplied from the power supply inlet to the user devices on the power supply circuit,
the load control device comprising:
a sensing system for detecting variations in power load caused by switching on or off of a load caused by one of said user devices;
and an arrangement for creating soft load changes arranged whereby:
when said load is switched on, instead of a full load power being supplied by the power system, power is supplied by a power supply component at the subscriber premises for a short time and this power supplied is reduced over a time period substantially matching or greater than said natural time constant of the power supply system;
and when said load is switched off, instead of the full load power being released, it is used to charge the power supply component for a short time and this charging is reduced over a time period again substantially matching or greater than said natural time constant of the power supply system.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/597,553Filed 9 Oct 2019 · division
Priority: 23 Oct 2014
Published: US 2020/0091718 A119 Mar 2020
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

H02J 3/1828
Using shunt compensators: with stepwise control, e.g. switched capacitor banks
G05B 15/02
Systems controlled by a computer: electric
G06F 1/26
Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00: power supply means, e.g. regulation thereof
H02J 3/16
Arrangements for adjusting voltage in AC networks by changing a characteristic of the network load: by adjustment of reactive power

Family

Application14/521,971Parent of this continuation-in-part · filed 23 Oct 2014
Application14/920,135Parent of this continuation-in-part · filed 22 Oct 2015
Application15/790,879Parent of this division · filed 23 Oct 2017
US 2020/0091718 A1Pre-grant publication · published 19 Mar 2020
US 10,491,002 B2Parent of this division
US 9,806,524 B2Parent of this continuation-in-part
Application15/790,879Parent of this continuation-in-part
US 9,634,489 B2Parent of this continuation-in-part
US 2016/0118792 A1Published application
US 2016/0164291 A1Published application
US 2018/0233911 A1Published application
US 10,855,078 B2This patent

From the US filing history. Foreign family members aren’t listed.