Handling method of province-level power grid black-start and large-range power failure accidents

A provincial power grid and accident handling technology, applied in the field of power system, can solve problems such as system collapse, complex and variable availability of power transmission and transformation equipment, and load recovery impact, etc., and achieve the effect of formulating a scientific system

Inactive Publication Date: 2013-04-10
CHINA THREE GORGES UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the availability of power generation equipment and power transmission and transformation equipment during the black start process is complex and changeable. In addition, the existing black start scheme only does basic safety and stability checks, while the self-excitation criterion, air-conditioning Load tra...

Method used

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  • Handling method of province-level power grid black-start and large-range power failure accidents
  • Handling method of province-level power grid black-start and large-range power failure accidents
  • Handling method of province-level power grid black-start and large-range power failure accidents

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Experimental program
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Embodiment

[0034] The detailed simulation calculation and analysis of the black start process of the black start scheme of the Leiyang Plant by the Hunan Dongjiang Unit via the long-distance high-voltage line is carried out. The calculation report is as follows:

[0035] 1) Self-excitation calibration: The self-excitation problem of the unit is a resonance phenomenon. When the length of the transmission line increases, the capacitive reactance XC of the line becomes smaller. If XCXd+XT, self-excitation does not occur, On the contrary, a self-excitation phenomenon occurs. In this scheme, the Dongjiang generator set empty-charges the 220kV busbar of the Leiyang plant via the long-distance high-voltage line:

[0036] Xd+XT=0.5947+0.0853=0.68 (per unit value),

[0037] Bc=2*(0.018682+0.056+0.004446)=0.158

[0038] XC=6.32 (per unit value),

[0039] XC>>Xd+XT, so self-excitation will not occur.

[0040] 2) Power frequency overvoltage verification: The total length of the power transmissi...

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Abstract

The invention discloses a handling method of province-level power grid black-start and large-area power failure accidents. The black-start of the power grid is divided into two stages, schemes of black-start of several subsystems are generated on conditions that black-start power sources and other constraint conditions are satisfied, and all of the schemes of black-start of the several subsystems are relatively independent and synchronous recovery is possible. When all of the subsystems are recovered, power is transmitted to surplus non-transmitted nodal points of designated girds, and power supply points are charged nodal points in the system at the moment, power-transmission paths are preferably calculated and are not necessarily black-start assembling units. The handling method of the province-level power grid black-start and large-range power failure accidents takes quick recovery optimization algorithms of large-area power failure accidents as the core, provides black-start optimization schemes by utilizing black-start optimization algorithms, divides the province-level power grid black-start into a stage of subsystem independent recovery and a stage of interconnection and corporation recovery to ensures that establishment of black-start schemes is more systemic and scientific.

Description

technical field [0001] The invention relates to a method for handling black-start and large-area blackout accidents of a provincial power grid, and relates to the field of electric power systems. Background technique [0002] With the development and progress of society, people have higher and higher requirements for production and quality of life, and more and more dependence on electric energy, which inevitably requires the power grid to have higher power supply security and reliability. Since the 1960s, there have been many blackouts in various countries, which have seriously affected people's social and economic activities. Although after decades of development, the power system has made great progress in safety and stability technology, but due to the extremely complex factors affecting the safe and stable operation of the power system, some accidental factors, such as natural disasters; human factors, such as: misoperation, The mutual superposition of wars and terrori...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 周云海唐立春陈浩王正纲李军陈卓张彬桥粟世玮
Owner CHINA THREE GORGES UNIV
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