Calculation method and calculation system for intra-area black-start recovery network

A calculation method and black start technology, applied in calculation, complex mathematical operations, instruments, etc., can solve problems such as difficult to quickly determine the optimal solution, and achieve a reasonable line reactive effect

Active Publication Date: 2021-06-01
STATE GRID SHAANXI ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solving the optimal recovery path for black start is a problem of finding a local minimum tree in graph theory. It has been proved to be a polynomial non-deterministic problem (NPC, non-deterministic polynomial complete problem), and it is difficult to quickly determine the optimal solution.
At present, there is still a lack of a method to quickly solve the optimal starting network directly by solving differential equations without repeated searches.

Method used

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  • Calculation method and calculation system for intra-area black-start recovery network
  • Calculation method and calculation system for intra-area black-start recovery network
  • Calculation method and calculation system for intra-area black-start recovery network

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Embodiment

[0061] The present invention is described in detail below in conjunction with specific examples, the IEEE 39 node power grid is as follows figure 1 As shown, node 33 is a hydroelectric power plant, and it is used as a black start power supply. Its installed capacity is 3×200MW, The maximum reactive power that the unit can absorb when it is no-load is 0.3S N . During the black start process, one unit is completely connected to the factory power, and the other two units are black start units. The starting power that the black start unit can provide is 80% of its rated power.

[0062] Step 1: Define e j and b j variable

[0063]

[0064]

[0065]

[0066] c j Can be determined by a broad or deep search.

[0067] Step 2: Establish the line reactive power table shown in Table 1 according to the association relationship of each node.

[0068] Table 1 Line reactive power matrix

[0069]

[0070] Table 1, w 1 ~w 39 are 39 nodes in the power grid, d ij Conside...

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Abstract

The invention discloses a calculation method and a calculation system for an intra-area black-start recovery network, an optimal network among units during black-start is determined by using a constructed energy function, and the constraint that the reactive power absorption capacity of a black-start power supply is greater than capacitive reactive power is naturally considered in a mode of minimizing line reactive power. The optimal start-up network can be quickly obtained in the form of solving the differential equation set, a linear programming tool is not needed, and a new method is provided for solving the start-up network.

Description

technical field [0001] The invention belongs to the technical field of power grid start-up scheme design, and in particular relates to a calculation method and a calculation system for an intra-area black start restoration network. Background technique [0002] After the black boot partition scheme is determined, it is necessary to provide maximum power support to restore the system as soon as possible. However, the start-up characteristics of each unit are different. In the early stage of recovery, the unit needs to comprehensively consider factors such as unit rated capacity, start-up time, and ramp rate to determine the unit with priority for recovery. During recovery of the unit, the selected transmission line generates capacitive reactive power at no load. When the reactive power absorption capacity of the black start power supply is less than the capacitive reactive power, it will lead to unbalanced reactive power and voltage rise. Therefore, determining a reasonable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06G06Q10/04G06F17/13
CPCG06Q50/06G06Q10/04G06F17/13
Inventor 彭书涛霍超程林章海静邓俊夏楠郑天悦李树芃尹俊钢李俊臣
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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