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Synchronously-closed multi-CPU coprocessing method

A collaborative processing and collaborative system technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as large inrush current

Active Publication Date: 2010-06-30
南京弘毅电气自动化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If one of the latter three conditions cannot be met, a large inrush current may be generated.

Method used

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  • Synchronously-closed multi-CPU coprocessing method
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  • Synchronously-closed multi-CPU coprocessing method

Examples

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Embodiment 1

[0024] Such as figure 2 As shown, DPR300AS digital automatic quasi-synchronization device, the first CPU system 1 and the second CPU system 2 use TI's high-speed DSP, the third CPU system 3 uses Motorola's 32-bit CPU, the first CPU1 and the second CPU2 from their respective The voltage data on both sides of the synchronous point is collected in an independent sampling loop. The third CPU system 3 shares the sampling data with the first CPU system 1 and the second CPU system 2 through the internal RAM. The first CPU system 1 and the second CPU system 2 complete the same A function that exits through an AND gate exits. The CPU system 3 functions as a synchronization relay.

[0025] Such as figure 1 As shown, a synchronous multi-CPU cooperative processing method includes a third CPU system 3 for coarse range control, two first CPU system 1 and second CPU system 2 for precise range control, and the synchronous process includes The following steps:

[0026] ① The first CPU sys...

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Abstract

The invention discloses a synchronously-closed multi-CPU (Central Processing Unit) coprocessing method, which comprises the following steps: (1) acquiring voltage signals of two sides of synchronous points through independent AD sampling by first and second CPU systems; (2) respectively calculating the voltage difference, the frequency difference and the angle difference of two sides of the synchronous points by the first and second CPU systems; (3) when the voltage difference of two sides of the synchronous points calculated by the first and second CPU systems does not meet the synchronous requirements, respectively transmitting a voltage regulating signal which passes through an AND gate outlet until the voltage difference meets the synchronous conditions; (4) when the frequency difference of two sides of the synchronous points calculated by the first and second CPU systems does not meet the synchronous requirements, respectively transmitting a frequency regulating signal which passes through an AND gate outlet until the frequency difference meets the synchronous conditions; (5) simultaneously operating the step (3) and the step (4), stopping regulating when the voltage difference and the frequency difference simultaneously meet the requirements; (6) sharing sample data among a third CPU system, the first CPU system and the second CPU system through an internal RAM (Random Access Memory); and (7) turning on a positive power supply of an outlet relay when the angle difference of two sides of the synchronous points is detected within 10 degrees by the third CPU system.

Description

technical field [0001] The invention relates to a method for synchronous closing at a synchronous point, in particular to a multi-CPU cooperative processing method for synchronous closing. Background technique [0002] The synchronous closing operation of the synchronous point is a complex and important operation in electrical operation. There are many cases of non-synchronous closing due to synchronous operation or synchronous device problems at home and abroad, especially for synchronous grid connection of generators, which will seriously damage the generator and even cause system oscillation. The synchronous closing process of the synchronous point must meet the following four conditions: [0003] 1) The phase sequence on both sides of the synchronization point must be the same [0004] 2) The voltages on both sides of the synchronous point are nearly equal [0005] 3) The frequencies on both sides of the synchronous point are nearly equal [0006] 4) The phases of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/40
Inventor 谢家麟
Owner 南京弘毅电气自动化有限公司
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