Photovoltaic power generation system virtual synchronous machine control method, device, converter and system

A photovoltaic power generation system and virtual synchronous machine technology, applied in photovoltaic power generation, circuit devices, battery circuit devices, etc., can solve problems such as weak grid support capability and control delay.
CN108923462BActive Publication Date: 2021-07-06ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
Publication Date
2021-07-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a photovoltaic power generation system virtual synchronous machine control method, a control device, a converter and a system. The present invention connects the energy storage device and the energy storage converter on the DC side where the photovoltaic inverter is connected to the photovoltaic module; collects the voltage and current of the photovoltaic module and executes the maximum power point tracking algorithm to obtain the target value of the DC voltage, according to the The DC voltage target value controls the energy storage converter to operate in a constant output DC voltage mode; the DC power output by the photovoltaic module is multiplied by the conversion efficiency of the photovoltaic inverter, and the SOC of the superimposed energy storage device is optimized to adjust the power component as the photovoltaic inverter. The active power command is used to control the photovoltaic inverter to operate in a virtual synchronous machine mode according to the active power command. The invention only needs a small battery capacity to meet the application requirements, ensures the maximum power generation of the photovoltaic panel, optimizes the availability and life of the battery, and provides power support for the grid.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of power electronic converter control, in particular to a control method, a control device, a converter and a system for a virtual synchronous machine of a photovoltaic power generation system with additional energy storage. Background technique

[0002] Photovoltaic inverters are usually connected to the grid in the form of current sources to generate maximum power, synchronized with the grid through a phase-locked loop, and achieve maximum power generation through the maximum power point tracking (MPPT) algorithm. Photovoltaic inverters do not have the ability to actively respond to grid frequency and voltage changes, and have no inertia, so they lack the ability to support the grid. In recent years, the Virtual Synchronous Generator (VSG) has been used more and more due to its excellent characteristics such as autonomous frequency regulation, autonomous voltage regulation, inertia, and damping.

[0003] When the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More