Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Grid black start method and system based on energy storage system

A technology of black start and power grid, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of cumbersome synchronous communication process and low reliability of communication lines

Active Publication Date: 2021-09-03
SUNGROW POWER SUPPLY CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current grid black start control method based on the energy storage system requires a synchronization waiting time when the energy storage converters are connected in parallel, and the synchronization communication process is cumbersome, or the reliability of communication lines needs to be set between devices.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Grid black start method and system based on energy storage system
  • Grid black start method and system based on energy storage system
  • Grid black start method and system based on energy storage system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Firstly, the basic concept of the energy storage converter is introduced. The Power Conversion System (PCS) can control the charging and discharging process of the battery, perform AC-DC conversion, and can directly supply power to AC loads in the absence of a grid. . PCS is composed of DC / AC bidirectional converter, control unit and so on. The PCS controller receives the background control command through communication, and controls the PCS to charge or discharge the battery according to the sign and size of the power command, so as to realize the adjustment of the active power and reactive power of the grid.

[0039] In the traditional grid black start control scheme based on the energy storage system, the energy storage converters participating in the black start are relatively independent after starting, and the master controller controls the output voltage of one energy storage converter to obtain a synchronous voltage, and then waits for all Other energy storage ...

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

PUM

No PUM Login to View More

Abstract

This application provides a grid black start method and system based on an energy storage system, which directly controls the parallel connection of each energy storage converter when the energy storage converter is started, the main energy storage converter establishes a voltage, and the secondary energy storage converter Monitor the voltage status of the AC port, and when the voltage of the AC port meets the networking conditions, each energy storage converter is connected in parallel to the network output. This process does not require repeated synchronization confirmation between the controller and each energy storage converter. Moreover, after each energy storage converter is connected in parallel to the network, each energy storage converter, regardless of the master and slave, jointly increases its own AC output voltage. This process does not require repeated synchronization confirmation between the controller and each energy storage converter. . Therefore, this solution reduces the synchronization confirmation waiting time in the whole black start process and shortens the black start time. At the same time, the size of the rising gradient can be adjusted, that is, the voltage rising slope can be set, so that the synchronous start time can be set according to actual needs.

Description

technical field [0001] The invention belongs to the technical field of power generation, and in particular relates to an energy storage system-based power grid black start method and system. Background technique [0002] When the power plant is decoupled from the power grid and shut down, the entire power plant will be in a state of no electricity. The process of the main generator set of the power plant from no power to the unit restarting to connect to the grid or to establish a grid-connected voltage is called a black start. [0003] When the power plant is equipped with an energy storage system, the AC output voltage can be established through the energy storage system to provide the excitation required by the main step-up transformer of the generator set, as well as the power requirements such as its starting unit, and finally complete the grid-connected power generation of the main generator set Black boot. However, the current grid black start control method based on...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38H02M1/36
CPCH02J3/00H02J3/38H02M1/36
Inventor 陈方林程林潘涛潘年安曹晓辉
Owner SUNGROW POWER SUPPLY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com