Day-ahead static security correction method

A static safety check, tie-line technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as unreasonable power distribution

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +1
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Problems solved by technology

However, in the current static safety check of multi-regional large power grids, the quality of data such as power generation plans, load forecasts, and maintenance plans reported by each region is different. There are many unreasonable power distributions in the results of power grid planning ahead of time

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Embodiment Construction

[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] The invention proposes a method for realizing static security checking and calculation based on section power control of regional tie lines. Flowchart such as figure 1 shown, including the following steps:

[0040] Step 1: Pre-check and correct the power plan value of the cross-section of the inter-area tie line:

[0041] In step 1 according to claim 1, suppose that the large power grid is divided into N areas, the sum of the active power of all tie lines in each area and other areas is the tie line section of the area, and the tie line in the i-th area is set The line section power is p i , the initial value of the cross-section power plan of the tie line is Then it can be known that the sum of cross-sectional powers of tie lines in all regions is zero:

[0042] The pre-verification of the cross-sectional...

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Abstract

The invention relates to the technical field of dispatching automation of an electric power system, in particular relates to a day-ahead static security correction method. The security correction method comprises the following steps of step 1, pre-checking and correcting a power planned value of an interregional junctor section; step 2, carrying out AC (alternating current) power flow calculation, and calculating balancing nodes and unbalanced active power in each region; step 3, judging whether the absolute value of the unbalanced active power is less than a convergence criteria; if the absolute value of the unbalanced active power is greater than the convergence criteria, adjusting an adjustable unit and the loaded active power, and returning to the step 2; and otherwise converging power flow, utilizing the power flow calculation result to calculate N-1 and fault set. According to the invention, the active power transmitted by the junctor section is controlled by the planned value, and mismatch quantity between a generation schedule of a system generator set and bus load prediction data is eliminated through partitioned iteration, and a reasonable day-ahead AC (alternating current) power flow section is provided to improve reliability and practicability of day-ahead security correction of the electric power system.

Description

technical field [0001] The invention relates to the technical field of electric power system scheduling automation, in particular to a day-ahead static security checking method. Background technique [0002] Recently, the static safety check technology is the main basis for the power grid dispatching department to determine the future operation mode of the power grid and guide the safety of power production, which will directly affect the safe operation of the power grid in the future; with the rapid construction of UHV large power grid and integrated operation, in It is the main development trend to uniformly carry out day-ahead planning and safety check calculation nationwide. However, in the current static safety check of multi-regional large power grids, the quality of data such as power generation plans, load forecasts, and maintenance plans reported by each region is different. There are many unreasonable power distributions in the results of power grid's planned powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 蔡帜董炜门德月戴赛张传成阎翠会
Owner STATE GRID CORP OF CHINA
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