Patent ID: 9728967
Date: 2017-08-08
CPC Classifications: H02J,Y02E,Y02P

Claim:
1. In combination with an AC power system having an AC power source and an electrical load that are interconnected by at least one power conveying line for conveying power from said AC power source to said electrical load, a system for improving power factor of the AC power system by continuously variable, analog control of level of reactive current introduced into said power conveying line, comprising: a) a power factor-improving circuit including at least one channel that comprises a channel-level AC electron tube circuit and at least one associated reactive impedance element interconnected in series manner; said AC electron tube circuit and said at least one associated reactive impedance element being coupled between said power conveying line of the AC power system and ground; b) each of said channel-level AC electron tube circuit being responsive to a control system for continuously variable, analog control of the level of reactive current in the at least one associated reactive impedance element so that the foregoing level of reactive current changes, as necessary, in a continuously variable, analog manner to improve power factor in said power conveying line; and c) each of said channel-level AC electron tube circuit comprising one AC cold-cathode field-emission electron tube rated at medium to high voltage or two unidirectional cold-cathode field-emission electron tubes rated at medium to high voltage and connected in anti-parallel manner.