公开(公告)号：WO2018058351A1

公开(公告)日：2018-04-05

申请号：PCT/CN2016/100510

申请日：2016-09-28

Applicant: ABB SCHWEIZ AG ,  GE, Junjie ,  HUANG, Xing ,  XIE, Hailian

Inventor： GE, Junjie ,  HUANG, Xing ,  XIE, Hailian

IPC: H02J3/38 ,  G05F1/67

Abstract: It provides control system and photovoltaic system and micro-grid using the same and method thereof. The control system for controlling a photovoltaic converter includes: a first input, for receiving first signals indicating first sampling values of an input current of the photovoltaic converter provided by a solar panel; a second input, for receiving second signals indicating second sampling values of an input voltage of the photovoltaic converter provided by the solar panel; a third input, for receiving third signals indicating third sampling values of an output voltage of the photovoltaic converter; and a controller, for first regulating the output voltage of the photovoltaic converter in a direction towards a reference voltage based on the third sampling value by regulating the input voltage by first voltage change of a first predetermined level; wherein: the controller is further adapted for monitoring a trend of the input voltage and power provided by the solar panel based on the first sampling values and the second sampling values for the previous sampling time points and the current sampling time point, and suspending the first regulation in case that the trend changes. This allows for an improvement of transient response of the control system and preventing possible overshooting of a lower input voltage even when the solar panel operating point is relatively far away from the MPP.

Abstract translation: 它提供控制系统和使用其的光伏系统和微电网及其方法。 用于控制光伏转换器的控制系统包括：第一输入，用于接收指示由太阳能电池板提供的光电转换器的输入电流的第一采样值的第一信号; 第二输入，用于接收指示由太阳能电池板提供的光伏转换器的输入电压的第二采样值的第二信号; 第三输入，用于接收指示所述光电转换器的输出电压的第三采样值的第三信号; 以及控制器，用于首先通过以第一预定电平的第一电压变化来调节输入电压，基于第三采样值在朝向参考电压的方向上调节光电转换器的输出电压; 其特征在于：所述控制器还用于基于所述第一采样值和所述第二采样值针对所述先前采样时间点和所述当前采样时间点监测所述太阳能电池板提供的输入电压和功率的趋势， 在趋势发生变化的情况下进行监管。 这允许改善控制系统的瞬态响应，并且即使在太阳能电池板操作点距离MPP相对较远时也可以防止较低输入电压的可能的过冲。

公开(公告)号：WO2019153305A1

公开(公告)日：2019-08-15

申请号：PCT/CN2018/076314

申请日：2018-02-11

Applicant: ABB SCHWEIZ AG ,  HUANG, Xing ,  XIE, Hailian ,  GE, Junjie

Inventor： HUANG, Xing ,  XIE, Hailian ,  GE, Junjie

IPC: H02J3/38

Abstract: A charging station, a method and device for controlling the charging station are provided. The charging station(100) includes a controller(118) configured to obtain load predictions of electric vehicles(120,122) and load predictions of a photovoltaic converter(110) for time slots over a time period; determine power values of an energy storage converter(114) for the time slots over the time period based on the load predictions and a cost model of the utility; and cause the energy storage converter(114) to supply power from an energy storage(112) for the first time slot based on a power value associated with the first time slot. The controller(118) may repeat the process with updated predictions.

公开(公告)号：WO2019127185A1

公开(公告)日：2019-07-04

申请号：PCT/CN2017/119254

申请日：2017-12-28

Applicant: ABB SCHWEIZ AG ,  GE, Junjie ,  MENG, Jinlei ,  ZHANG, Wenliang ,  LI, Tinho

Inventor： GE, Junjie ,  MENG, Jinlei ,  ZHANG, Wenliang ,  LI, Tinho

IPC: H02M7/00 ,  G01R27/26

CPC classification number: H02M1/32 ,  G01R27/26

Abstract: Embodiments of the present disclosure relates to a method and system for on-line condition monitoring of a direct current (DC) -link capacitor in a power converter. The method includes (a) detecting a first waveform of voltage at the DC-link capacitor generated when the power converter operates with an output voltage reference for a plurality of switching periods. The method also includes (b) determining, based on an estimated parameter related to condition monitoring of the DC-link capacitor, an estimated second waveform of voltage at the DC-link capacitor for at least one of the plurality of switching periods; and (c) determining a differential waveform between the first and second waveforms with respect to the at least one switching period of the step (b). In parallel to the step (a), the steps (b) and (c) are repeated by adjusting the estimated parameter step by step until the differential waveform approaches below a predetermined threshold. The method also includes (d) determining, based on the estimated parameter, a target parameter related to the condition monitoring of the DC-link capacitor.

公开(公告)号：WO2019127184A1

公开(公告)日：2019-07-04

申请号：PCT/CN2017/119253

申请日：2017-12-28

Applicant: ABB SCHWEIZ AG ,  GE, Junjie ,  MENG, Jinlei ,  ZHANG, Wenliang ,  LI, Tinho

Inventor： GE, Junjie ,  MENG, Jinlei ,  ZHANG, Wenliang ,  LI, Tinho

IPC: G01R27/26

Abstract: A method and system for on-line condition monitoring of a direct current (DC) -link capacitor in a power converter. The method includes detecting a first waveform of voltage at the DC-link capacitor that is generated by applying a first control signal with a first duty cycle for at least one first switching period on the power converter (310). The method also includes detecting a second waveform of voltage at the DC-link capacitor that is generated by applying a second control signal with a second duty cycle for at least one second switching period following the at least one first switching period on the power converter (320), the second duty cycle deviating from the first duty cycle within a predetermined range. The method further includes determining, based on the second waveform, a parameter related to a health condition of the DC-link capacitor (330).