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A DC Power Control Strategy to Suppress Continuous Commutation Failure

A commutation failure, DC power technology, applied in AC network circuits, power transmission AC networks, circuit devices, etc., can solve the problem of few emergency control methods for continuous commutation failure, achieve good engineering adaptability and application prospects, suppress Effects of successive commutation failures, improved reactive power requirements and recovery characteristics

Active Publication Date: 2022-04-22
LIYANG RES INST OF SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that although the current research has achieved certain results, there are corresponding deficiencies, and there are still relatively few emergency control methods for continuous commutation failures that meet the needs of actual engineering.

Method used

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  • A DC Power Control Strategy to Suppress Continuous Commutation Failure
  • A DC Power Control Strategy to Suppress Continuous Commutation Failure
  • A DC Power Control Strategy to Suppress Continuous Commutation Failure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] In this embodiment, the PSD-BPA developed by China Electric Power Research Institute is used as the simulation tool, and the simulation analysis is performed based on the data of an actual power grid. The data includes FF, JS, LZ, LF, YH, BJ, LS, and JN, totaling eight circuits of direct current.

[0096] According to step A, the commutation failure critical voltage U of each DC circuit is calculated by formula (15) and formula (17) cr1 and U cr2 ,As shown in Table 1:

[0097] Table 1 Critical voltage for commutation failure

[0098]

[0099]

[0100] Among them, LF DC is taken as an example for analysis and verification. Set up a three-way N-1 fault on an UHV line. During the period, the LF DC commutation bus voltage, active power, reactive power absorbed by unipolar and the simulation curves of the arc-extinguishing angle are shown in the following figures: 2 to 2 Figure 5 shown. According to the simulation curve, during the recovery process of the first co...

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Abstract

The invention provides a DC power control strategy for suppressing continuous commutation failure. This strategy first predicts the risk of continuous commutation failure based on the change trend of DC system commutation bus voltage, active power, absorbed reactive power, and arc extinguishing angle during the recovery process of the first commutation failure; then based on the continuous The prediction result of the commutation failure risk reduces or restores the DC transmission power in real time to improve the reactive power demand and recovery characteristics of the DC system, thereby suppressing continuous commutation failures. Compared with the existing method, the invention has higher engineering adaptability and application prospect.

Description

technical field [0001] The invention relates to the field of power system stability analysis and control research, in particular to a DC power control strategy for suppressing continuous commutation failure. Background technique [0002] The extensive development and utilization of traditional fossil energy has caused a series of problems such as resource shortage, environmental pollution and climate change. The transformation and transformation of energy is imperative. The fundamental way out is to realize clean substitution and electric energy substitution through energy development and consumption. Therefore, in order to promote the transformation of energy transformation and realize the cross-regional optimal allocation of electric energy, so as to meet the growing demand for electricity in load centers, high-voltage direct current transmission based on thyristors has been widely used due to its advantages in large-capacity and long-distance power transmission. Access to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2003/365H02J2203/20Y04S10/52Y02E60/60
Inventor 汤奕郑晨一张超明
Owner LIYANG RES INST OF SOUTHEAST UNIV