Digital & Analog Electro-Hydraulic Control System in Isolated Grid

doi:10.11930/j.issn.10.11930.2015.4.147

Abstract

Abstract: The paper analyzes the characteristics and relations of primary frequency modulation and secondary frequency modulation of steam turbines in isolated grid. A digital & analog electro-hydraulic control system is researched, which, through the primary frequency modulation module and valve curve module, can realize the quick hardware frequency modulation, improve the response speed and stability of the primary frequency modulation and reduce the frequency adjustment period. The hardware and software features of the system is described and the dead band of primary frequency modulation is canceled. It is proved in practice that the united control system of hardware primary frequency modulation and software secondary frequency modulation is feasible.

Key words: isolated grid, primary frequency modulation, secondary frequency modulation, DEH, control system, steam turbine

CLC Number:

TM761+.2

TIAN Jun, WU Tianming, XIE Guoqiang, WANG Junxiang, LI Mingjun, LI Bo. Digital & Analog Electro-Hydraulic Control System in Isolated Grid[J]. Electric Power, 2015, 48(4): 147-150.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.4.147

https://www.electricpower.com.cn/EN/Y2015/V48/I4/147

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