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

Method for controlling small disturbance voltage stability of microgrid system

A voltage stability and control method technology, applied in the direction of AC network voltage adjustment, photovoltaic power generation, wind power generation, etc., can solve the problems of increasing system control costs, low efficiency, and complicated control methods, and achieve good low-interference voltage stability, Effects of improving stability and reducing system cost

Active Publication Date: 2018-03-23
SHANGHAI UNIVERSITY OF ELECTRIC POWER
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research on voltage stability with small disturbances is only for a single generator or wind turbine, and there is no specific research method for microgrid systems; In the research method, all micro-sources participate in tie-line power control and voltage-frequency control. This control method is complex and inefficient, which increases the cost of system control.

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
  • Method for controlling small disturbance voltage stability of microgrid system
  • Method for controlling small disturbance voltage stability of microgrid system
  • Method for controlling small disturbance voltage stability of microgrid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] The invention relates to a control method for small disturbance voltage stability of a microgrid system, such as figure 1 As shown, the microgrid system controlled by this method includes a photovoltaic power source, a diesel generator, and a DFIG connected to one end of the 10kV bus, and a fixed load and a temporary load connected to the other end of the 10kV bus. like figure 2 Shown, control method of the present invention comprises the following steps:

[0041] 1) Acquisition of state variables, including:

[0042] Obtain the state variables of the photovoltaic power supply, use the P-Q mode to control the photovoltaic power supply, use P-Q decoupling to control the PWM converter, set the photovoltaic power supply at the maximum output power operating point, and obtain the state variables of the photovoltaic power supply;

[0043] Diesel generator state variables are obtained by using an automatic voltage regulator with Q-V droop control to adjust the frequency an...

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 relates to a method for controlling the small disturbance voltage stability of a microgrid system. The microgrid system controlled by the method comprises a photovoltaic power source, adiesel generator and a DFIG that are connected to one end of a 10kV bus. The control method includes the following steps of: 1) state variable acquisition, including the acquisition of a photovoltaicpower source state variable, the acquisition of a diesel generator state variable, and the acquisition of a DFIG state variable; 2) characteristic value calculation including combining the photovoltaic power source state variable, the diesel generator state variable, and the DFIG state variable to construct a system state space model and to obtain the characteristic value of a system state matrix;3) specific parameter determination including combining the acquired characteristic value and the change trend of a voltage dynamic response curve at a PCC point, and determining the specific parameter affecting the small disturbance voltage stability; and 4) voltage control including improving the specific parameter to improve the small disturbance voltage stability. Compared with the prior art,the method is simple and visual, reduced in cost, and high in control efficiency.

Description

technical field [0001] The invention relates to the field of micro-grid system voltage control, in particular to a control method for small-disturbance voltage stability of the micro-grid system. Background technique [0002] Under the dual pressure of energy demand and environmental protection, the international community has turned more attention to the technical field of distributed power generation that can not only improve the efficiency of traditional energy utilization but also make full use of various renewable energy sources. Microgrid technology is an effective way to exert the efficiency of distributed power generation, and it has important economic significance and social value. When the microgrid is connected to the grid, the voltage is supported by the external large power grid, and the island operation can only be regulated and controlled by the internal distributed power supply. Therefore, the research on the voltage control of micro-sources in the microgrid ...

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): H02J3/12H02J3/38
CPCH02J3/385H02J3/386H02J3/12H02J3/381H02J2203/20Y02E10/56Y02E10/76
Inventor 赵晶晶左亮亮
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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