Emergency coordination control method and system for coping with multi-circuit direct current blocking fault

A coordinated control system and DC blocking technology, which is applied in the direction of emergency treatment AC circuit layout, AC network circuit, power transmission AC network, etc., can solve problems such as multi-circuit DC blocking instability, achieve defense stability problems, and avoid operational risks. Effect

Active Publication Date: 2021-04-06
NARI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: the present invention proposes an emergency coordination control method and system

Method used

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  • Emergency coordination control method and system for coping with multi-circuit direct current blocking fault
  • Emergency coordination control method and system for coping with multi-circuit direct current blocking fault
  • Emergency coordination control method and system for coping with multi-circuit direct current blocking fault

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1 As shown, an emergency coordinated control method to deal with multiple DC blocking faults, including steps:

[0043] Step 1. Obtain the basic power grid information, and analyze the under-control volume P that the system can withstand to meet the safety and stability of the power system under the simultaneous or successive blocking faults of multiple DC circuits according to the time-domain simulation software. 1 .

[0044] The basic power grid information includes: electromechanical transient simulation data, expected fault sets, control resources, single DC blocking off-line control strategy, power grid operation mode and safe and stable operation boundary of the power system;

[0045] The expected fault set includes: any combination of multiple DC blocking faults;

[0046] The control resources include: DC controllable resources and load controllable resources;

[0047] The single DC blocking off-line control strategy refers to: the security control...

Embodiment 2

[0063] An emergency coordinated control system for dealing with multiple DC blocking faults, including:

[0064] The off-line calculation module is used to obtain the basic power grid information, and according to the time-domain simulation software, obtain the under-control volume P that the system can withstand under the simultaneous or successive blocking faults of multiple DC circuits to meet the safety and stability of the power system 1 ;Calculate the amount of additional control resources P due to overlapping control measures after simultaneous or successive blocking of multiple DC circuits 重 ; Establishing an extended control resource pool that considers simultaneous or successive blocking faults under the maximum power of multiple direct currents; the extended control resource pool includes: a single direct current control resource and additional control resources;

[0065] On-line calculation module, used to calculate according to DC operating power, under-control qu...

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Abstract

The invention discloses an emergency coordination control method and system for coping with a multi-circuit direct current blocking fault. The method comprises the steps of obtaining basic power grid information, and obtaining an under-control quantity which can be borne by a system and meets the safety and stability of a power system under a multi-circuit direct current simultaneous or successive blocking fault according to time domain simulation software, calculating an additional control resource quantity due to overlapping of control measures after a multi-circuit direct current simultaneous or successive blocking fault, establishing an extended control resource pool considering simultaneous or successive blocking faults under the maximum power of the multi-circuit direct current, wherein the extended control resource pool comprises a single direct-current control resource and an additional control resource, and calculating an emergency additional control quantity according to the direct-current operation power, the under-control quantity and the total real-time safety control action quantity, adding corresponding control resources according to the extended control resource pool, and issuing the corresponding control resources to the direct-current cooperative control master station for execution. And the stability problem caused by multi-loop high-power direct current blocking can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to an emergency coordination control method and system for dealing with multi-circuit DC blocking faults. Background technique [0002] Due to the serious imbalance between load centers and energy distribution in my country, the rapid development of UHV DC has effectively alleviated the above contradictions and played an important role in realizing the large-scale optimal allocation of resources in my country. However, as economic development enters a new normal, under the background of slow load growth, the load center is continuously fed in with UHV DC, and the scale of receiving DC cross-regional receiving end grid continues to increase, and the contradiction of "strong direct and weak AC" has become increasingly prominent. Single or multiple DC blocking faults lead to high-power power flow transfer, which can easily i...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/36
CPCH02J3/001H02J3/36H02J2203/20Y02E60/60
Inventor 黄畅想柯贤波常海军霍超刘福锁张钢王超魏平孙仲卿孙震宇李威黄慧赵学茂李兆伟王玉郜建良
Owner NARI TECH CO LTD
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