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Quick switch-back protection method for local power grid power generation unit

A technology for local power grids and generator sets, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as inconsistent load requirements of local power grids, and achieve the effect of ensuring safety

Active Publication Date: 2008-04-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the OPC protection action under the FCB logic protection method of the existing local area grid, it will directly lead to the FCB action, which will automatically reduce the load by 95%-100%, which does not meet the load requirements of the local area grid.

Method used

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  • Quick switch-back protection method for local power grid power generation unit
  • Quick switch-back protection method for local power grid power generation unit

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] see figure 2 , the fast switch-back protection method of the generator set in the local grid is: under the condition of ensuring the safety of the generator set in the local grid, the generator set in the local grid can run in isolation with the local grid system under the condition of system out-of-tuning fault. When the following four conditions are met at the same time, the "fast switch back" FCB protection action command of the local power grid generator set is triggered:

[0026] (1) The permission conditions for fast switching back to FCB of local power grid generators exist

[0027] This refers to the necessary prerequisites for the effective implementation of the FCB instruction, generally refers to the "boiler fuel volume control system", "boiler combustion air volume control system", "boiler feed water control system" in the ...

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Abstract

The invention relates to a protection method for safe operation of a power grid, in particular to a fast switchback protection method for a generating set in a local power grid. A fast switch-back protection method for a generator set in a local power grid, which is an instruction to trigger a fast switch-back protection action of a generator set in a local power grid when the following four conditions are met simultaneously under the safe operation condition of the generator set in the local power grid : (1) The permission condition for fast switching back of the generator set in the local power grid exists; (2) The main fuel cutoff of the boiler does not occur; (3) The load of the generator in the local power grid is greater than 30%; (4) The main transformer outlet of the generator in the local power grid Switch tripped. The invention perfects the protection of the generator set in the special system in the local grid, and can run in isolation with the local grid under the condition of ensuring the safety of the generator set of the local grid. So as to meet the production continuity requirements of special industries such as metallurgy and petrochemical, and ensure the safety of personal and core equipment.

Description

(1) Technical field [0001] The invention relates to a protection method for safe operation of a power grid, in particular to a fast switchback protection method for a generating set in a local power grid. (2) Background technology [0002] The power grid can be divided into a generalized power grid and a local area power grid. The generalized power grid refers to a large power grid composed of many power plants and equipped with multiple sets of large generator sets, and is connected to each other. The local area power grid refers to a local, geographically Relatively concentrated power consumers are arranged, including a power plant and a small power grid equipped with several medium-capacity generator sets as the main power supply. [0003] If a generating set or a small-capacity power plant in the generalized power grid has a partial failure or a complete shutdown, the grid frequency deviation caused by the grid power shortage can be controlled by the primary frequency re...

Claims

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Application Information

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IPC IPC(8): H02H7/26
Inventor 陈又申谢同琪聂慧明
Owner BAOSHAN IRON & STEEL CO LTD
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