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An emergency coordinated control method and system for dealing with multi-circuit DC blocking faults

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: 2022-08-09
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 for dealing with multi-circuit DC blocking faults, which solves the problem of instability caused by multiple-circuit DC blocking

Method used

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  • An emergency coordinated control method and system for dealing with multi-circuit DC blocking faults
  • An emergency coordinated control method and system for dealing with multi-circuit DC blocking faults
  • An emergency coordinated control method and system for dealing with multi-circuit DC blocking faults

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Embodiment 1

[0042] like figure 1 As shown in the figure, an emergency coordinated control method for dealing with multi-circuit DC blocking faults includes the steps:

[0043] Step 1: Obtain the basic power grid information, and analyze the under-controlled quantity P that the system can withstand under the simultaneous or successive blocking faults of multiple DC circuits according to the time domain simulation software, which meets the safety and stability of the power system. 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 power system safe and stable operation boundary;

[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 ref...

Embodiment 2

[0063] An emergency coordinated control system for dealing with multi-circuit DC blocking faults, comprising:

[0064] The offline calculation module is used to obtain the basic power grid information. According to the time domain simulation software, the under-controlled quantity P that the system can withstand under the simultaneous or successive blocking faults of multiple DC circuits can be obtained to meet the safety and stability of the power system. 1 ; Calculate the additional control resources P due to the overlapping of control measures after the simultaneous or successive blocking faults of multiple DC circuits 重 ; establish an extended control resource pool considering simultaneous or successive blocking faults under the maximum power of multiple DCs; the extended control resource pool includes: a single DC control resource and an additional control resource;

[0065] Online calculation module, used for DC operating power, under-controlled quantity P 1 and the tot...

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PUM

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Abstract

The invention discloses an emergency coordination control method and system for dealing with multi-circuit direct current blocking faults. The basic power grid information is obtained, and according to time domain simulation software, the system can bear the safety and stability of the power system under the simultaneous or successive blocking faults of multiple direct currents. Calculate the amount of additional control resources due to overlapping control measures after multiple DC simultaneous or successive blocking faults; establish an extended control resource pool that considers simultaneous or successive blocking faults under the maximum power of multiple DCs; The type of control resource pool includes: single DC control resources and additional control resources; according to the DC operating power, under-control volume and the total amount of real-time safety control actions, the emergency additional control volume is calculated, and the corresponding control resources are added according to the extended control resource pool. resources, and send it to the DC co-control master station for execution. It can effectively prevent the stability problems caused by multiple high-power DC blocking.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and 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 UHVDC has effectively alleviated the above contradictions and played an important role in realizing the large-scale optimal allocation of resources in my country. However, with the economic development entering a new normal, under the background of slow load growth, the load center is continuously fed with UHV DC, and the scale of DC cross-regional DC input of the receiving end grid continues to increase, and the contradiction of "strong DC and weak AC" has become increasingly prominent. Single or multiple-circuit DC blocking faults lead to high-power power flow transfer, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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