公开(公告)号：US09841778B2

公开(公告)日：2017-12-12

申请号：US15229980

申请日：2016-08-05

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: G05B19/042 ,  G05F1/66 ,  H01J3/38 ,  H02J3/38

CPC classification number: G05F1/66 ,  G05B19/0426 ,  G05B2219/40458 ,  G05B2219/50083 ,  H02J3/383 ,  H02J3/386

Abstract: The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation, thereby decreasing system line losses.

公开(公告)号：US09436200B2

公开(公告)日：2016-09-06

申请号：US13836276

申请日：2013-03-15

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: G06F1/26 ,  G05F1/66

CPC classification number: G05F1/66 ,  G05B19/0426 ,  G05B2219/40458 ,  G05B2219/50083 ,  H02J3/383 ,  H02J3/386

Abstract: The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation, thereby decreasing system line losses.

Abstract translation: 本发明提供了与使用多个基于逆变器的发电设施的输电和配电网络中提供全系统协同控制电压调节支持相关的系统，方法和设备，其耦合到用于最小化传输的电力传输和配电网络， 配电线损耗。 本发明采用基于变频器的分布式发电机作为静态同步补偿器（STATCOM）的新颖控制方法，以实际发电后剩余的变频器容量提供动态电压调节/控制，从而降低系统线路损耗。

公开(公告)号：US11271405B2

公开(公告)日：2022-03-08

申请号：US16541349

申请日：2019-08-15

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: H02J3/24 ,  H02J3/38 ,  H02J3/48 ,  H02J3/50 ,  H02M7/44 ,  H02J3/18 ,  H02J3/32 ,  H02J7/35

Abstract: Systems, methods, and devices relating to operating a power generation facility to contribute to the stability of the power transmission system. A controller operates on the power generation facility to modulate real power or reactive power or both in a decoupled manner to contribute to the stability of the power transmission system. Real power produced by the power generation facility can be increased or decreased between zero and the maximum real power available from the PV solar panels, as required by the power system. Reactive power from the power generation facility can be exchanged (injected or absorbed) and both increased or decreased as required by the power transmission system. For solar farms, the solar panels can be connected or disconnected, or operated at non-optimal power production to add or subtract real or reactive power to the power transmission system.

公开(公告)号：US10571948B2

公开(公告)日：2020-02-25

申请号：US15796555

申请日：2017-10-27

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: G05F1/66 ,  G05B19/042 ,  H02J3/38

Abstract: The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation or absorption facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses and for performing Conservation Voltage Reduction. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation or absorption, thereby decreasing system line losses and performing Conservation Voltage Reduction.

公开(公告)号：US10256635B2

公开(公告)日：2019-04-09

申请号：US15072014

申请日：2016-03-16

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma ,  Vinod Khadkikar ,  Shah Arifur Rahman

IPC: H02J3/00 ,  H02J3/38 ,  H02J3/01 ,  H02J3/18 ,  H02J3/40 ,  H02J9/00 ,  H02M7/44

Abstract: The invention provides a method and system for operating a solar farm inverter as a Flexible AC Transmission System (FACTS) device—a STATCOM—for voltage control. The solar farm inverter can provide voltage regulation, damping enhancement, stability improvement and other benefits provided by FACTS devices. In one embodiment, the solar farm operating as a STATCOM at night is employed to increase the connectivity of neighboring wind farms that produce peak power at night due to high winds, but are unable to connect due to voltage regulation issues. The present invention can also operate during the day because there remains inverter capacity after real power export by the solar farm. Additional auxiliary controllers are incorporated in the solar farm inverter to enhance damping and stability, and provide other benefits provided by FACTS devices.

公开(公告)号：US11784496B2

公开(公告)日：2023-10-10

申请号：US17543182

申请日：2021-12-06

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: H02J3/38 ,  H02J3/01 ,  H02M7/44 ,  H02J3/18 ,  H02J3/40 ,  H02J9/00

CPC classification number: H02J3/388 ,  H02J3/01 ,  H02J3/1842 ,  H02J3/40 ,  H02J9/00 ,  H02M7/44 ,  Y02E10/56 ,  Y02E40/10 ,  Y02E40/20 ,  Y02E40/40

Abstract: The invention provides a method and system for operating an inverter based distributed power generation source with energy storage system, as a Flexible AC Transmission System (FACTS) device—a STATCOM. The inverter based distributed power generation source can provide reactive power compensation, voltage regulation, damping enhancement, stability improvement and other benefits provided by FACTS devices. These STATCOM functions are provided when the said energy storage based distributed power generation source is doing at least one of: i) not exchanging active power with said power grid system, or ii) exchanging active power less than a maximum inverter capacity with said power grid system. The present invention thus provides a technological improvement that opens up a new set of applications and potential revenue earning opportunities for energy storage based distributed power generation sources other than simply from exchanging (injecting or absorbing) active power.

公开(公告)号：US11586236B2

公开(公告)日：2023-02-21

申请号：US16745509

申请日：2020-01-17

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: G05B19/042 ,  G05F1/66 ,  H02J3/16 ,  H02J3/18 ,  H02J3/38

Abstract: The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation or absorption facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses and for performing Conservation Voltage Reduction. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation or absorption, thereby decreasing system line losses and performing Conservation Voltage Reduction.

公开(公告)号：US09019673B2

公开(公告)日：2015-04-28

申请号：US13827979

申请日：2013-03-14

Applicant: Rajiv Kumar Varma ,  Shah Arifur Rahman

Inventor： Rajiv Kumar Varma ,  Shah Arifur Rahman

IPC: H02H3/00 ,  H02H3/08 ,  H02H7/122 ,  H02H7/28 ,  H02H7/20

CPC classification number: H02H3/08 ,  H02H7/1227 ,  H02H7/20 ,  H02H7/28

Abstract: Systems, methods, and devices relating to fault detection and short circuit current management support in power transmission and distribution networks using multiple inverter based power generation facilities. A fault detection process uses the waveshape (or the rate of change of the current) of the distributed generator output short circuit current to determine if a trip signal is required to disconnect the inverter based power generation facility from the transmission and distribution network. The process operates on DGs such as photovoltaic (PV) based solar farm. The present invention applies to the entire 24-hour period operation of inverter based DGs (e.g., solar farms, wind farms, fuel cell based DGs, etc.).

Abstract translation: 使用多台基于逆变器的发电设备的输配电网络中的故障检测和短路电流管理相关的系统，方法和设备。 故障检测过程使用分布式发电机输出短路电流的波形（或电流的变化率）来确定是否需要跳闸信号来将基于逆变器的发电设备与传输和分配网络断开连接。 该过程在诸如基于光伏（PV）的太阳能农场的DG上运行。 本发明适用于基于逆变器的DG（例如，太阳能农场，风力发电场，基于燃料电池的DG等）的整个24小时运行。

公开(公告)号：US20120205981A1

公开(公告)日：2012-08-16

申请号：US13391699

申请日：2010-09-15

Applicant: Rajiv Kumar Varma ,  Vinod Khadkikar ,  Shah Arifur Rahman

Inventor： Rajiv Kumar Varma ,  Vinod Khadkikar ,  Shah Arifur Rahman

IPC: H02J9/00

CPC classification number: H02J3/383 ,  H02J3/01 ,  H02J3/1842 ,  H02J3/386 ,  H02J3/40 ,  H02J9/00 ,  H02M7/44 ,  Y02E10/563 ,  Y02E40/16 ,  Y02E40/22 ,  Y02E40/40 ,  Y10T307/615

Abstract: The invention provides a method and system for operating a solar farm inverter as a Flexible AC Transmission System (FACTS) device—a STATCOM—for voltage control. The solar farm inverter can provide voltage regulation, damping enhancement, stability improvement and other benefits provided by FACTS devices. In one embodiment, the solar farm operating as a STATCOM at night is employed to increase the connectivity of neighbouring wind farms that produce peak power at night due to high winds, but are unable to connect due to voltage regulation issues. The present invention can also operate during the day because there remains inverter capacity after real power export by the solar farm. Additional auxiliary controllers are incorporated in the solar farm inverter to enhance damping and stability, and provide other benefits provided by FACTS devices.

Abstract translation: 本发明提供了一种用于操作太阳能农场逆变器作为用于电压控制的柔性交流传输系统（FACTS）装置（STATCOM）的方法和系统。 太阳能农场逆变器可以提供FACTS设备提供的电压调节，阻尼增强，稳定性改进和其他优点。 在一个实施例中，采用在晚上作为STATCOM运行的太阳能电场来增加由于大风而在夜间产生峰值功率的相邻风力发电场的连通性，但由于电压调节问题而不能连接。 本发明也可以在白天进行操作，因为在太阳能农场实际输出电力后仍然存在逆变器容量。 额外的辅助控制器并入太阳能农场逆变器以增强阻尼和稳定性，并提供FACTS设备提供的其他优点。

公开(公告)号：US11990753B1

公开(公告)日：2024-05-21

申请号：US18159534

申请日：2023-01-25

Applicant: Rajiv Kumar Varma

Inventor： Rajiv Kumar Varma

IPC: G05B19/042 ,  H02J3/18 ,  H02J3/38

CPC classification number: H02J3/18 ,  G05B19/042 ,  H02J3/381 ,  G05B2219/2639 ,  H02J2300/24 ,  H02J2300/28

Abstract: The invention provides systems, methods, and devices relating to the provision of system-wide coordinated voltage regulation support in power transmission and distribution networks using multiple inverter-based based power generation or absorption facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses and for performing Conservation Voltage Reduction. The invention uses a novel control method of inverter-based based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation or absorption, thereby decreasing line losses, performing Conservation Voltage Reduction (CVR), reducing load demand, decreasing peak demand, and reducing energy consumption.