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Optimal allocation method of power shortage after fault of multi-DC sending-end grid

A power deficit and multi-DC technology, which is applied to AC network circuits, power transmission AC networks, circuit devices, etc., can solve problems such as difficult frequency recovery of the power grid, and achieve the effect of ensuring frequency and realizing multi-regional coordination and optimization of large power deficits

Inactive Publication Date: 2018-12-07
NARI TECH CO LTD +4
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a post-failure power deficit optimization and allocation method for multiple DC sending end power grids, and solve the technical problem in the prior art that it is difficult for the power grid to quickly support frequency recovery after a fault

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  • Optimal allocation method of power shortage after fault of multi-DC sending-end grid
  • Optimal allocation method of power shortage after fault of multi-DC sending-end grid

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Embodiment Construction

[0053] The post-failure power shortage optimization and allocation method of multi-DC sending-end power grids provided by the present invention includes: reading relevant data of power grids and analyzing and processing the data; Judgment and positioning; calculate the actual power deficit of the whole network after various control measures work; calculate the power deficit apportionment of each provincial control area and carry out safe return to school: if the safety constraints are violated, calculate the power of each provincial level through the regional equivalent power generation sensitivity The correction amount of the shortfall power allocation in the control area; the power shortfall allocation amount is sent to each provincial control area by means of forwarding and remote adjustment, and returns to zero. By considering the actions of multi-level scheduling and multi-type control measures after the failure of the multi-DC sending-end power grid, the method realizes t...

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Abstract

The invention discloses an optimal allocation method of power shortage after fault of a multi-DC sending-end grid. The method comprises the following steps: reading grid related data and carrying outanalysis and processing on the data; calculating power variation of each provincial-level control area, and judging and positioning a fault provincial-level control area; calculating actual power shortage amount of the whole grid obtained after a plurality of control measures; calculating power shortage allocation amount of each provincial-level control area and carrying out safety back calibration; if violating security constraints, calculating shortage power allocation correction of each provincial-level control area through regional equivalent power generation sensitivity; and issuing the shortage power allocation correction to each provincial-level control area in a forwarding and d remote regulating manner, and resetting to zero. The method realizes large power shortage multi-region coordinative and optimal allocation after fault and ensures quick recovery of frequency and safe and efficient operation of the multi-DC sending-end grid after disturbance by considering multi-stage scheduling and multi-class control measure action situations of the multi-DC sending-end grid after fault.

Description

technical field [0001] The invention relates to a post-fault power deficit optimization and allocation method for multi-DC sending-end power grids, which belongs to the technical field of power grid dispatching. Background technique [0002] With the continuous expansion of the scale of DC projects in my country, the impact of the DC transmission operation mode on the stability of the AC system is deepening. Compared with the load center system at the receiving end, the AC system at the sending end energy base generally has small scale, large installed capacity, and grid structure. Weakness and other characteristics, the frequency problem of the AC system at the sending end becomes more prominent after the system is disturbed. [0003] Most of my country's DC sending-end power grids are systems with a high proportion of clean energy such as hydropower. Hydropower units modify the parameters of governors to suppress ultra-low frequency oscillations caused by water hammer effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/34
CPCH02J3/34H02J3/48H02J2203/20
Inventor 谈超吴继平杨可王民昆滕贤亮胡翔伍凌云卿泉杨洋张小白徐瑞蒋长江夏春兰强何笠刘爱梅胡帆庞涛
Owner NARI TECH CO LTD
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