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

Power-voltage coordination control method and device for DC power distribution network

A technology of DC distribution network and DC voltage, which is applied in the direction of DC network circuit device, load balance in DC network, circuit device, etc., to achieve the effect of ensuring power quality, realizing orderly control, and clear control

Inactive Publication Date: 2017-08-25
CHINA ELECTRIC POWER RES INST +2
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The DC distribution network contains multiple converter stations, which involves issues such as power supply load balance and voltage quality. In order to meet the needs of the development of existing technologies, the present invention provides an operation control for the DC distribution network according to the control time and control Hierarchically construct the control objectives and strategies under different time scales of corresponding control modes, and a method and device for power-voltage coordinated control of DC distribution network under multiple time scales

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
  • Power-voltage coordination control method and device for DC power distribution network
  • Power-voltage coordination control method and device for DC power distribution network
  • Power-voltage coordination control method and device for DC power distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The technical solutions provided by the present invention will be described in detail below in combination with the accompanying drawings and in the form of specific embodiments.

[0049] The technical solution provided by the present invention is mainly aimed at the DC distribution network under voltage droop control, and constructs a multi-time scale layered and coordinated DC distribution network power-voltage coordinated control mode to realize the orderly control of the DC distribution network power-voltage, At the same time, the problem of voltage deviation that may be caused by voltage droop control is solved.

[0050] The DC distribution network determines the predicted power supply, load and other operating parameters of the distribution network and system voltage and other operating parameters according to the superior power grid dispatching system, and calculates the optimized power flow, distributes the power flow distribution of each converter station and di...

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

The invention provides a power-voltage coordination control method and device for a DC power distribution network, and the method comprises the steps: building a long-time scale system optimization control model according to the network topology, power and load conditions of the DC power distribution network; solving the long-time scale system optimization control model, and calculating the flow distribution of the DC power distribution network and the power reference value and voltage reference value of a current converter station; determining a sagging control curve according to the power reference value and voltage reference value of the current converter station; and achieving the no-difference adjustment of voltage according to the sagging control curve during load disturbance. The device comprises a modeling unit, a solving unit, a sagging curve control unit, and an adjustment unit. According to the technical scheme of the invention, the method can improve the operation reliability of a power grid, and guarantees the electric energy of the DC power distribution cabinet.

Description

technical field [0001] The invention relates to the technical field of power system distribution network operation control, in particular to a power-voltage coordinated control method and device for a DC distribution network. Background technique [0002] The DC distribution network is a DC-led power distribution system. It utilizes the flexible DC technology of voltage source converters and the characteristics of flexible and controllable power flow. The problem of insufficient reactive power supply in the load center provides an effective method. The primary problem of the DC distribution network is power control, and the active power balance of the DC grid is reflected by the DC voltage. Therefore, the key to the stable operation of the DC distribution network is to control the DC voltage. [0003] The voltage control methods of the DC distribution network mainly include voltage droop control and master-slave control. Among them, the voltage droop control means that the ...

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 Applications(China)
IPC IPC(8): H02J1/00H02J1/14H02J3/36
CPCY02E60/60H02J1/00H02J1/14H02J3/36
Inventor 卫泽晨于汀范士雄李立新蒲天骄於益军韩巍李时光王子安王伟刘幸蔚吴新景杜佳桐
Owner CHINA ELECTRIC POWER RES INST
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