An application method of node voltage stability index of multi-feed AC-DC system

An AC-DC system, node voltage technology, applied in the direction of AC network voltage adjustment, reactive power compensation, etc., can solve the problem that the voltage stabilization effect is not fully reflected, cannot directly and effectively reflect the stability of the multi-DC feeding system, and cannot indicate the DC power. Loss of influence degree and other issues to achieve the effect of improving ability
CN105610168BActive Publication Date: 2018-07-31ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2018-07-31

Smart Images

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

Abstract

The invention provides an application method of a node voltage stability index of a multi-infeed AC / DC system. The node voltage stability index of the multi-infeed AC / DC system provides a comprehensive, integrated and effective quantitative index for the large-disturbance voltage stability degree in a multi-DC drop point region, has the similarities of employing the bus short-circuit capacity as a denominator and considering the influence of a multi-loop DC in comparison with an existing multi-infeed short-circuit ratio index, but also considers the region load influence, the voltage stability effects of various dynamic reactive compensation devices and the like as a comprehensive and integrated large-disturbance voltage stability degree measurement index; and these integrated factors are weighted as molecules according to the dynamic reactive demand condition. The multi-infeed AC / DC system provided by the invention is concise and clear in voltage stability index under the large-disturbance condition and convenient to apply, provides the comprehensive, integrated and effective quantitative index for the large-disturbance voltage stability degree in the multi-DC drop point region, and can provide important reference indexes for power network planning, multi-loop DC access, system stabilizing measures designation and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an application method of a voltage stability index in the case of a large disturbance of a multi-infeed AC-DC system, and belongs to the technical field of power system safety and stability analysis. technical background

[0002] The unbalanced distribution of energy resources and economic development determines that China Southern Power Grid needs to carry out west-to-east power transmission and cross-regional resource optimization for a long period of time. Prospects With the large-scale DC centralized feed-in of the Southern Power Grid to the receiving-end grid, the load density of the receiving-end system is further increased, and the problems of AC-DC interaction, voltage stability, and short-circuit current exceeding the standard of the power grid become more prominent, and the operation risk and difficulty of operation control of the power grid are likely to increase.

[0003] In multi-infeed AC / DC systems, since faults...

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