公开(公告)号：US10404065B2

公开(公告)日：2019-09-03

申请号：US15552189

申请日：2016-12-16

Applicant: SOUTHEAST UNIVERSITY

Inventor： Wei Gu ,  Guannan Lou ,  Ming Chen ,  Wei Liu ,  Shuai Xue ,  Ge Cao

IPC: H02J3/12 ,  H02J3/18 ,  H02J3/38 ,  H02J3/14 ,  H02J3/40

Abstract: A distributed predictive control based voltage restoration scheme for microgrids, comprising: step 10) adopting a distributed finite time observer to acquire the global reference voltage for restoring the voltage of each local controller; step 20) each local controller adopts a droop control to acquire the local voltage value of each generation, and adds a secondary voltage compensation term into the droop characteristic formula to form the voltage reference value of a distributed generation; step 30) establishing a trended prediction model; step 40) acquiring a predictive control term at a current time as the secondary voltage compensation command, and acting on the local controllers; and step 50) determining, whether the local voltage of each distributed generation of the microgrid reaches the voltage reference value under the secondary voltage compensation command.

公开(公告)号：US10756569B2

公开(公告)日：2020-08-25

申请号：US16107932

申请日：2018-08-21

Applicant: SOUTHEAST UNIVERSITY

Inventor： Wei Gu ,  Guannan Lou ,  Suyang Zhou ,  Zhi Wu ,  Ge Cao

IPC: H02J13/00 ,  H02J3/38 ,  H02M7/217 ,  H02J3/12 ,  G05B17/02 ,  H02M1/44

Abstract: A decentralized voltage control method for a microgrid based on nonlinear state observers, comprising the steps of step 10), establishing a large-signal model of distributed generations, a connection network and impedance-type loads in the microgrid; step 20), establishing a Luenberger-like nonlinear state observer for each distributed generation; step 30), estimating the dynamic characteristics of other distributed generations in real time based on the local measured values of each distributed generation; and step 40), implementing the decentralized voltage control based on the control requirements of reactive power sharing and voltage restoration. The control method realizes the voltage control of microgrid based on the decentralized state observers, which does not rely on communication transmission or remote measurement and avoids the adverse effects of communication latency and data drop-out on the control performance.