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Bottom-guaranteed power grid optimization method for key area power grid under violent typhoon condition

A technology of key areas and optimization methods, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as grid collapse, grid AC line overload, system transient instability, etc., to ensure the effect of transient stable operation

Pending Publication Date: 2020-11-13
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to overcome the typhoon described in the above-mentioned background technology, when any two or more circuit disconnection faults occur, then the power grid may have a large-scale transfer of power flow and cause other AC lines to be overloaded, thereby causing system transient instability. Power grid collapse problem, providing a power grid optimization method for key regional power grids in the case of strong typhoons

Method used

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  • Bottom-guaranteed power grid optimization method for key area power grid under violent typhoon condition
  • Bottom-guaranteed power grid optimization method for key area power grid under violent typhoon condition
  • Bottom-guaranteed power grid optimization method for key area power grid under violent typhoon condition

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Effect test

Embodiment 1

[0041] This embodiment provides a power grid optimization method for key regional power grids in the case of strong typhoons, such as figure 1 shown, including the following steps:

[0042] S1. Select the connection line between the guaranteed power grid and the external power grid: there are N connecting lines between the guaranteed power grid and the external power grid, namely Line1, Line2L and LineN. In order to reduce the probability and frequency of line trips caused by typhoons.

[0043]S2. Establish the active power adjustment capability of the guaranteed power grid: the generator capacity in the guaranteed power grid is greater than the load level and the active power flows from the guaranteed power grid to the external power grid to ensure that the guaranteed power grid has a power adjustment margin. The maximum power of a single generator in the guaranteed power grid is P G单max , the maximum daily load fluctuation of the guaranteed bottom grid is ΔP Lmax , the cur...

Embodiment 2

[0060] This embodiment is similar to Embodiment 1, the difference is that the situation of use is different, specifically:

[0061] Such as Figure 5 As shown, the key power supply regional power grid, ZHH station, and JD station are used as the network frame system of the guaranteed bottom grid 1; the scope of the guaranteed bottom grid 1 is determined based on steps S1 and S2, and there are six substations and one power plant in the guaranteed bottom grid 1; the guaranteed bottom grid 1 There are twelve connecting lines with an external power grid, namely GZH A-B line, JZH A-B line, ZHF line, JF line, JG A-B line, JQ A-B line and YQ A-B line; among them, there are four cables, which are ZHF line and JF line and JG Line A and B; based on steps S3, S4, and S5, it is determined that the installed capacity of the WY power plant in the guaranteed bottom grid 1 is 2×390MW, and the total load is 1229MW; the load level within the guaranteed bottom grid 1 is greater than the generato...

Embodiment 3

[0066] This embodiment is similar to Embodiment 1, the difference is that the situation of use is different, specifically:

[0067] Such as Figure 8 As shown, the key power supply regional power grid, YD station, NP station and HW power plant are used as the network frame system of the guaranteed grid 1, and the guaranteed range is determined based on steps S1 and S2. There are six substations and two power plants in the guaranteed grid 1; the guaranteed grid 1 There are seven connecting lines with the external power grid, namely ZHH A, B and C lines, JQ A and B lines and JN A and B lines; ZHH A, B and C lines are cables. Based on steps S3, S4, and S5, it is determined that the installed capacity of the WY power plant in the guaranteed bottom grid 1 is 2×390MW, the installed capacity of the HW plant is 2×180MW, the total installed capacity is 1140MW, and the total load of the grid is 962MW; the generator capacity within the guaranteed bottom grid 1 is greater than load level...

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Abstract

The invention provides a bottom-guaranteed power grid optimization method for a key area power grid under a strong typhoon condition. The method comprises the steps of S1, selecting tie lines for interconnection of a bottom-guaranteed power grid with an external power grid; S2, taking the power control level of the tie lines as a basis to formulate generator active power regulation and load control measures in the bottom-guaranteed power grid area; S3, carrying out power flow zero-cutting control on a contact section of the bottom-guaranteed power grid and the external power grid; S4, controlling the voltage level of a bus node in the bottom-guaranteed power grid; S5, carrying out transient stability characteristic verification in bottom-guaranteed power grid division process through PSD-BPA equipment; and S6, performing middle transient stability characteristic verification after splitting of the bottom-guaranteed power grid and the external power grid through the PSD-BPA equipment. According to the method, the situation that simultaneous fault tripping of multiple tie lines is possibly caused in the typhoon invasion process is considered, it is proposed that the number of loops of grounding cables serving as the tie lines is increased as much as possible in the bottom-guaranteed power grid division process, and it can be ensured that impact caused by multi-loop line trippingof the overhead line due to typhoon invasion is the minimum.

Description

technical field [0001] The invention relates to the field of power grid fault maintenance, and more specifically, relates to an optimization method for power grid guarantee in key areas under the condition of strong typhoon. Background technique [0002] In recent years, strong typhoons have repeatedly ravaged coastal areas, posing a greater threat to the safe and stable operation of power grids in coastal areas. Typhoon Hato, which landed in Zhuhai in 2017, and Typhoon Mangkhut, which landed in Zhuhai in 2018, affected the safe and stable operation of the Zhuhai power grid to varying degrees, and caused a large number of tower collapses and disconnection faults, causing a large number of load losses , has brought adverse effects on the national economy. [0003] Due to the great uncertainty in the path and intensity of the typhoon, during the raging period of the typhoon, there are great uncertainties in the position of the overhead line in the power grid, the location of ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/48H02J3/06H02J3/16
CPCH02J3/001H02J3/48H02J3/06H02J3/16H02J2203/20Y02E40/30
Inventor 曹安瑛陈建福丘冠新甘德树龙霏张勇杨锐雄裴星宇郭华君吴海雄杜成涛幸旭彬
Owner GUANGDONG POWER GRID CO LTD
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