Parameterization Thevenin equivalence-based alternating current direct current received end power grid commutation failure fault preventive method

A Thevenin equivalent, receiving-end power grid technology, applied in the direction of AC network circuits, power transmission AC networks, circuit devices, etc., can solve the problems of loss of power, receiving-end power grid voltage, frequency shock, endangering the security and stability of the receiving-end power grid, etc. The effect of achieving good applicability, fast calculation speed, and improving the ability to defend against commutation failure failures

Active Publication Date: 2018-02-09
ZHEJIANG UNIV +3
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this context, the commutation failure of the DC converter station occurs, ranging from power loss, impacting the voltage and frequency of the receiv

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
  • Parameterization Thevenin equivalence-based alternating current direct current received end power grid commutation failure fault preventive method
  • Parameterization Thevenin equivalence-based alternating current direct current received end power grid commutation failure fault preventive method
  • Parameterization Thevenin equivalence-based alternating current direct current received end power grid commutation failure fault preventive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0068] The present invention will be further described below in conjunction with the drawings and embodiments.

[0069] This embodiment provides a method for preventing commutation failure of AC / DC receiving end power grid based on the parameterized Thevenin equivalent, such as figure 1 As shown, including the following steps:

[0070] Step (1): Load the steady-state power flow data of the AC / DC receiving end power grid, and the data of components such as generators, buses, lines, etc., and perform the power flow calculation under the normal operation mode of the receiving end power grid;

[0071] Step (2): Based on the data obtained in step (1), establish a short-circuit current calculation model for the receiving end grid;

[0072] Step (3): Based on the short-circuit current calculation model of the power grid obtained in (2), with the control variables to be optimized as parameters, a parameterized Thevenin equivalent model of the receiving end power grid is established through t...

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 parameterization Thevenin equivalence-based alternating current direct current received end power grid commutation failure fault preventive method. A parameterization received end power grid Thevenin equivalence model is obtained by adopting a generalized Galerkin method according to an alternating current direct current received end power grid short circuit current calculation model by considering a direct current commutation failure and multi-convertor-station concurrence failure caused by the alternating current system faults; and by taking the weight sum for improving the single convertor station commutation failure immune factor and the multi-convertor-station commutation failure immune factor as the optimization target, and by taking the parameterization Thevenin equivalence model as the constraint condition, an optimization model is established, so that the alternating current direct current received end power grid commutation failure fault defensive capability is improved. The method has relatively high applicability and high calculation speed, and can adapt to the alternating current direct current received end power grids in different operationmodes, and can better satisfy the actual demands.

Description

Technical field [0001] The invention belongs to the technical field of power systems, and specifically relates to a method for preventing commutation failure of AC and DC receiving end power grids based on parameterized Thevenin equivalent. Background technique [0002] In recent years, power construction has developed rapidly, with multiple high-voltage and UHV DC transmission lines completed and put into operation, and the proportion of cross-regional incoming power has been continuously increasing. In this context, the commutation failure of the DC converter station occurs, and the power is lost, which impacts the voltage and frequency of the receiving end grid. In the worst case, continuous commutation failures and DC blocking occur, which endanger the safety and stability of the receiving end grid. For this reason, improving the ability of AC and DC receiving-end power grids to prevent DC commutation failures is a top priority for improving the safe operation of the power gr...

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
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 夏冰清邱一苇吴浩宋永华凌卫家孙维真楼伯良邓晖华文黄弘扬赵一琰
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap