公开(公告)号：US10439398B2

公开(公告)日：2019-10-08

申请号：US15577127

申请日：2017-06-16

Applicant: Northeastern University

Inventor： Huaguang Zhang ,  Jun Yang ,  Qiuye Sun ,  Feiye Wu ,  Xinrui Liu ,  Dongsheng Yang ,  Zhiliang Wang ,  Jian Feng ,  Bonan Huang ,  Yanhong Luo ,  Guotao Hui ,  Zhenwei Liu

IPC: H02J3/18 ,  G05F1/14 ,  H02J3/16 ,  H02J3/00

Abstract: The invention provides a reactive power optimization system and a method of a power grid based on a double-fish-swarm algorithm. The system includes a power grid state data acquiring module, a reactive power regulating module and a reactive power executing module. The power grid state data acquiring module includes a power grid state data acquiring processor and a relay transmitter. The reactive power regulating module is a control terminal. The reactive power executing module includes generator terminal voltage regulators, transformer tap regulators and reactive power compensation regulators. The method is used for acquiring the initial data to be optimized in the current network; and optimizing the initial data to be optimized in the current network based on a double-fish-swarm algorithm so as to obtain optimal value of control variables in the power grid. According to the method, the distribution network to be optimized can realize reasonable reactive power flow distribution.

公开(公告)号：US20140297051A1

公开(公告)日：2014-10-02

申请号：US14224622

申请日：2014-03-25

Applicant: Northeastern University

Inventor： HuaGuang Zhang ,  QiuYe Sun ,  Jun Yang ,  XinRui Liu ,  ZhiLiang Wang ,  Fei Teng ,  Jing Guo ,  ZhanShan Wang ,  ZhenWei Liu ,  YingChun Wang

IPC: G05B15/02

CPC classification number: G05B15/02 ,  H02J3/382 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E70/30 ,  Y02P80/14

Abstract: The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system comprises a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack. Compared with the conventional microgrid comprising a distributed renewable energy power generation system, the present invention guarantees the stability and the high energy utilization of the power generation system and effectively solves the problem of non-uniform frequency of use of storage batteries to unify the service life of the storage battery pack.

Abstract translation: 本发明涉及智能微电网的能量资源 - 电网自动控制系统及其控制方法，属于微电网控制和电气技术领域。 能源资源 - 电网自动控制系统包括分布式可再生能源发电模块，分布式可再生能源逆变器模块，常规发电模块，用户负载模块，双向并网控制模块，分布式可再生能源智能 优化发电控制模块，能量存储模块，智能能量存储单元调节器和蓄电池组。 与包含分布式可再生能源发电系统的传统微电网相比，本发明保证了发电系统的稳定性和高能耗，有效解决了蓄电池使用频率不均匀的问题，使其使用寿命 的蓄电池组。

公开(公告)号：US09625931B2

公开(公告)日：2017-04-18

申请号：US14278524

申请日：2014-05-15

Applicant: Northeastern University

Inventor： HuaGuang Zhang ,  DongSheng Yang ,  ZhiLiang Wang ,  Jian Feng ,  XuanZhe Peng ,  YanHong Luo ,  Nan Wang ,  GuoTao Hui ,  Xue Liang ,  Jun Yang

IPC: H02J9/06 ,  G05F1/67

CPC classification number: G05F1/67 ,  H02J9/061 ,  H02J9/062 ,  Y10T307/625

Abstract: Provided are a bypass type 220V grid voltage sag prevention device and a control method therefor. The bypass type 220V grid voltage sag prevention device comprises an AC-to-DC energy storage unit, a Single Chip Microcomputer (SCM) control and display unit, and an inverter output unit. The AC-to-DC energy storage unit comprises a rectifier circuit, an energy storage control circuit and a quick tank circuit; the SCM control and display unit comprises an SCM, a DC step-down module circuit and an energy storage voltage detecting circuit; and the inverter output unit comprises a high-frequency PWM generating circuit, a high-frequency transformer output circuit, a transformer output full-bridge rectifier circuit, a PWM generating circuit, a PWM driving and full-bridge inverter circuit, a 220V grid zero-cross point detecting circuit, a 220V grid voltage detecting circuit, a 220V grid and inversion AC converting circuit, and a signal interface circuit.

公开(公告)号：US09618914B2

公开(公告)日：2017-04-11

申请号：US14224622

申请日：2014-03-25

Applicant: Northeastern University

Inventor： HuaGuang Zhang ,  QiuYe Sun ,  Jun Yang ,  XinRui Liu ,  ZhiLiang Wang ,  Fei Teng ,  Jing Guo ,  ZhanShan Wang ,  ZhenWei Liu ,  YingChun Wang

IPC: G05D3/12 ,  G05B15/02

CPC classification number: G05B15/02 ,  H02J3/382 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E70/30 ,  Y02P80/14

Abstract: The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system includes a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack. Compared with the conventional microgrid including a distributed renewable energy power generation system, the present invention guarantees the stability and the high energy utilization of the power generation system and effectively solves the problem of non-uniform frequency of use of storage batteries to unify the service life of the storage battery pack.

公开(公告)号：US10935581B2

公开(公告)日：2021-03-02

申请号：US16120907

申请日：2018-09-04

Applicant: Northeastern University

Inventor： Huaguang Zhang ,  Jun Yang ,  Jie Bai ,  Gang Wang ,  Qiuye Sun ,  Xinrui Liu ,  Yingchun Wang ,  Dongsheng Yang ,  Zhiliang Wang ,  Bonan Huang ,  Zhanshan Wang ,  Yanhong Luo

IPC: G01R21/133

Abstract: The invention provides an electric grid state estimation system and method based on a boundary fusion. The system includes an electric grid data acquisition module, a communication module including a local data unit and a state estimation unit, and a data fusion module, wherein the state estimation unit includes a memory storing a state estimation program and a display displaying a program running and outputting a state variable; the state estimation program is performed to realize an electric grid state estimation; the estimation method includes the following steps of dividing a regional electric grid, then establishing a measurement equation for each region, solving an internal quantity and a boundary quantity, fusing the boundary quantities of two regions, correcting the boundary quantity, performing a non-linear transformation on the intermediate variable, solving the estimated values of the state variable by the least square method, and performing outputting.

公开(公告)号：US20150188361A1

公开(公告)日：2015-07-02

申请号：US14278524

申请日：2014-05-15

Applicant: Northeastern University

Inventor： HuaGuang Zhang ,  DongSheng Yang ,  ZhiLiang Wang ,  Jian Feng ,  XuanZhe Peng ,  YanHong Luo ,  Nan Wang ,  GuoTao Hui ,  Xue Liang ,  Jun Yang

IPC: H02J9/06

CPC classification number: G05F1/67 ,  H02J9/061 ,  H02J9/062 ,  Y10T307/625

Abstract: Provided are a bypass type 220V grid voltage sag prevention device and a control method therefor. The bypass type 220V grid voltage sag prevention device comprises an AC-to-DC energy storage unit, a Single Chip Microcomputer (SCM) control and display unit, and an inverter output unit. The AC-to-DC energy storage unit comprises a rectifier circuit, an energy storage control circuit and a quick tank circuit; the SCM control and display unit comprises an SCM, a DC step-down module circuit and an energy storage voltage detecting circuit; and the inverter output unit comprises a high-frequency PWM generating circuit, a high-frequency transformer output circuit, a transformer output full-bridge rectifier circuit, a PWM generating circuit, a PWM driving and full-bridge inverter circuit, a 220V grid zero-cross point detecting circuit, a 220V grid voltage detecting circuit, a 220V grid and inversion AC converting circuit, and a signal interface circuit.

Abstract translation: 提供旁路型220V电网电压骤降防止装置及其控制方法。 旁路220V电网电压骤降防止装置包括AC-to-DC能量存储单元，单片微机（SCM）控制和显示单元以及逆变器输出单元。 AC到DC能量存储单元包括整流电路，能量存储控制电路和快速电路; SCM控制和显示单元包括SCM，DC降压模块电路和能量存储电压检测电路; 逆变器输出单元包括高频PWM发生电路，高频变压器输出电路，变压器输出全桥整流电路，PWM发生电路，PWM驱动和全桥逆变电路，220V电网零 交叉点检测电路，220V电网电压检测电路，220V电网和反相AC转换电路以及信号接口电路。