The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2024
Filed:
Aug. 06, 2020
Tokyo Electric Power Company Holdings, Incorporated, Tokyo, JP;
Meidensha Corporation, Tokyo, JP;
Kenichi Suzuki, Tokyo, JP;
Jun Takami, Tokyo, JP;
Ryota Samejima, Tokyo, JP;
Hideki Noda, Tokyo, JP;
Naoto Maeda, Tokyo, JP;
Toshiya Inoue, Numadu, JP;
Kazu Shoji, Numadu, JP;
TOKYO ELECTRIC POWER COMPANY HOLDINGS, INCORPORATED, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
A voltage drop Vzis calculated based on an output current detection value Iac and a virtual synchronous impedance Zs or a corrected virtual synchronous impedance Zs′, and a value obtained by subtracting the voltage drop Vzfrom an internal induced voltage Ef is output as a grid voltage command value Vac*. Zs calculation unitlimits an output current phase θ so that the output current phase θ is within an effective range by a phase limiter, and calculates the corrected virtual synchronous impedance Zs′ based on a limited output current phase θ, the internal induced voltage Ef, a grid voltage detection value Vac and a current limit value Ilim. Accordingly, in grid interconnection power conversion device that controls a virtual synchronous generator, it is possible to continue operation while suppressing an overcurrent and possess a synchronizing power generated by action or working of a virtual synchronous impedance.