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Alternative current and direct current coordination control method based on direct current power emergency control

A technology of AC-DC coordination and control method, which is applied in the field of AC-DC coordination control based on DC power emergency control, and can solve the problems that the control target deviates from the actual demand and the control method is difficult to apply in engineering, etc.

Active Publication Date: 2012-08-01
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Existing methods for AC-DC coordinated control and multi-DC coordinated control have disadvantages such as control objectives deviating from actual needs, and control methods that are difficult to apply in engineering.

Method used

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  • Alternative current and direct current coordination control method based on direct current power emergency control
  • Alternative current and direct current coordination control method based on direct current power emergency control
  • Alternative current and direct current coordination control method based on direct current power emergency control

Examples

Experimental program
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Embodiment

[0109] Taking the southwestern hydropower AC and DC transmission system of the Sichuan-Chongqing power grid in my country as an object, the emergency control of DC power in the Jiaba-Shanghai UHV DC system, Jinping-Suzhou UHV DC system and Deyang-Baoji HVDC system can reduce the transmission system Cut off the number of generators to achieve the effect of the second line of defense control measures for the power grid. In the example, the AC transmission line in parallel with the DC system is suddenly disconnected due to a fault, and the initial transmission power needs to be distributed to each DC system by using the emergency power control function of the above-mentioned three-circuit DC system to improve the performance of the AC line after the fault. System stability. The example adopts the AC-DC coordinated control scheme based on the principle of equal power load rate, and the control effect is as follows: Figure 5 with Image 6 shown, where Figure 5 In order to distr...

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Abstract

The invention belongs to the field of alternative current and direct current electricity transmission system operation control, in particular to an alternative current and direct current coordination control method based on direct current power emergency control, which comprises alternative current and direct current coordination control based on a priority allocation principle, alternative current and direct current coordination control based on an even allocation principle or alternative current and direct current coordination control based on an equal power loading rate principle. The alternative current and direct current coordination control method based on direct current power emergency control is applied to an direct current and alternative current system or a multi-direct-current system with a complex net frame structure and has the advantages of being strong in achieving method operability and wide in application range.

Description

technical field [0001] The invention belongs to the field of operation control of an AC-DC power transmission system, and in particular relates to an AC-DC coordination control method based on DC power emergency control. Background technique [0002] The DC system has the ability to quickly control the power. According to the stability analysis results, triggered by an event or a certain signal, the transmission power of the DC system can be quickly changed according to the strategy table or plan, including emergency DC power increase or drop. During the implementation process, the short-term and continuous overload capacity limitations of the DC system need to be considered for emergency power increase; the minimum operating power limit of the DC system needs to be considered for emergency power reduction. In actual engineering, it is common to encounter the situation of emergency boosting of DC power. [0003] Engineering application examples at home and abroad show that ...

Claims

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Application Information

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IPC IPC(8): H02J4/00H02J1/00
Inventor 郭小江郭剑波马世英
Owner CHINA ELECTRIC POWER RES INST
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