US 5,642,005 A · Method for interconnecting two synchronous polyphase AC networks and interconnecting apparatus for the same

Abstract

The method of interconnecting first and second synchronous polyphase AC networks is for regulating transfer of active power from one of the AC networks to the other. The method involves the steps of, for each phase line of the first AC network, connecting a first end of a first reactive element to the phase line of the first AC network; connecting a first end of a second reactive element to the phase line of the first AC network; applying to a second end of the first reactive element a first phase voltage derived from a second AC network; applying to a second end of the second reactive element a second phase voltage derived from the second AC network, the second phase voltage being phase shifted with respect to the first phase voltage. In a preferred method according to the invention, one of the reactive elements is inductive, and the other of the reactive elements is capacitive. In operation, a phase shift between the first and the second phase voltages forces a regulated transfer of active power from one of the AC networks to the other. Also provided is an interconnecting apparatus for the same purpose.

Claims40

Dependent claims

A method of interconnecting first and second synchronous polyphase AC networks having respective phase lines for regulating transfer of active power from one of said AC networks to the other of said AC networks, said method comprising the steps of, for each phase line of said first AC network:

(a) providing a first reactive element and a second reactive element, each said reactive element having a first end and a second end;
(b) connecting said first end of said first reactive element to said phase line of said first AC network;
(c) said connecting said first end of said second reactive element to said phase line of said first AC network;
(d) applying to said second end of said first reactive element a first phase voltage derived from said second AC network;
and
(e) applying to said second end of said second reactive element a second phase voltage derived from said second AC network, said second phase voltage being phase shifted with respect to said first phase voltage, one of said reactive elements being inductive and the other of said reactive elements being capacitive, whereby, in operation, a phase shift between said first phase voltage and said second phase voltage forces a regulated transfer of active power from one of said AC networks to the other.

3 more elements

An interconnecting apparatus for interconnecting first and second synchronous polyphase AC networks and for regulating transfer of active power from one of said AC networks to the other of said AC networks, each of said AC networks having a plurality of phase lines, said apparatus comprising, for each of said phase lines of said first AC network:

a first reactive element having a first end and a second end, said first end being provided with first connecting means for connecting said first reactive element to said phase line of said first AC network;
a second reactive element having a first end and a second end, said first end being provided with second connecting means for connecting said second reactive element to said phase line of said first AC network;
first connecting and transformer means for applying to said second end of said first reactive element a first phase voltage derived from said second AC network;
and
second connecting and transformer means for applying to said second end of said second reactive element a second phase voltage derived from said second AC network, said second phase voltage being phase shifted with respect to said first phase voltage, one of said reactive elements being inductive and the other of said reactive elements being capacitive, whereby, in operation, a phase shift between said first phase voltage and said second phase voltage forces a transfer of active power from one of said AC networks to the other.

2 more elements

Dependencies are inferred from the claim text.

Method for interconnecting two synchronous polyphase AC networks and interconnecting apparatus for the same

Life of this patent

Method for interconnecting two synchronous polyphase AC networks and interconnecting apparatus for the same

Life of this patent

Abstract

Claims40