Title:
LIQUID LEVEL CONTROL METHOD, APPARATUS AND DEVICE FOR DEAERATOR OF NUCLEAR POWER UNIT
Document Type and Number:
WIPO Patent Application WO/2022/037271
Kind Code:
A1
Abstract:
A liquid level control method, apparatus and device for a deaerator of a nuclear power unit. The method comprises: subjecting a deviation of a current liquid level of an ADG to an operation performed by a liquid level control ratio integration unit, and outputting a set flow rate value (S101); when an ARE flow rate is not lower than a preset ratio, switching to a cascaded control mode, and a flow rate ratio integration unit outputting a valve opening degree instruction (S102); when the ARE flow rate is lower than the preset ratio, switching to a single-stage automatic control mode, switching from a CEX closed-loop flow rate mode to a tracking mode, and calculating to obtain a valve opening degree instruction according to the set flow rate value, a first formula and a preset differential pressure correction formula (S103); when a CEX valve is in a manual state, the flow rate ratio integration unit outputting the valve opening degree instruction, wherein the valve opening degree instruction tracked by the flow rate ratio integration unit is obtained by calculating on the basis of current opening degrees of each valve and values of respective valves according to a second formula (S104); and executing an actual action so as to control the valve according to the valve opening degree instruction and a corrected opening degree curve (S105).
Inventors:
LI XIAOQIANG (CN)
YIN YAHUA (CN)
SONG YULIANG (CN)
YANG GUANG (CN)
YIN YAHUA (CN)
SONG YULIANG (CN)
YANG GUANG (CN)
Application Number:
PCT/CN2021/103417
Publication Date:
February 24, 2022
Filing Date:
June 30, 2021
Export Citation:
Assignee:
CHINA NUCLEAR POWER ENG CO LTD (CN)
CHINA GENERAL NUCLEAR POWER (CN)
CGN POWER CO LTD (CN)
CHINA GENERAL NUCLEAR POWER (CN)
CGN POWER CO LTD (CN)
International Classes:
G05D9/12; G05D9/00
Foreign References:
| CN113031663A | 2021-06-25 | |||
| CN104637557A | 2015-05-20 | |||
| CN101329585A | 2008-12-24 | |||
| CN210088824U | 2020-02-18 | |||
| CN102543235A | 2012-07-04 | |||
| CN108385599A | 2018-08-10 | |||
| JP2011174673A | 2011-09-08 |
Other References:
ZHANG XIN-LING, WANG HUI- FANG, LIANG XIAO- MING, LI ZHI- GUANGļ¼CHENG PU: "Application of JX-300XP in CE2000 Cascade Control System", RESEARCH PROGRESS OF POLYMYXIN B. CAOL AND CHEMICAL INDUSTRY - MEITAN YU HUAGONG, HEBEI SHENG MEITAN KEXUE YANJIUYUAN, CN, vol. 36, no. 6, 31 October 2013 (2013-10-31), CN , XP055901145, ISSN: 2095-5979
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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