A Hierarchical Control and Operation Method of No. 0 High Addition of Power Station Units under Multiple Operating Conditions

A power station unit and hierarchical control technology, applied in the direction of separation methods, control systems, chemical instruments and methods, etc., can solve the problems of economic and safety contradictions, no comprehensive consideration, and take care of one and lose the other, so as to improve the overall control level and take safety into consideration sexual and economical effects

Active Publication Date: 2021-07-20
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

Part of the control is based on the simple control of No. 0 high and the pressure after the steam control valve is added, and the other part is based on the principle of controlling the No. 0 high and the outlet water temperature. During the control process, there are often trade-offs. Without comprehensive consideration, the economy and There are contradictions in security, and it is impossible to achieve effective balance

Method used

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  • A Hierarchical Control and Operation Method of No. 0 High Addition of Power Station Units under Multiple Operating Conditions

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] Such as figure 1 Shown: According to the normal start-up requirements of the unit, firstly, the feed water in the deaerator is boosted by the front pump 11 and the feed water pump 13, and then enters the high-pressure heater, and then passes through 3-2-1 15-row high-heat generator and external steam cooling step by step device 16, and finally the feed water enters the No. 0 high-heater and 0-exhaust steam for heat exchange, so as to increase the outlet water temperature t of the No. 0 high-power out . 0 The extraction steam is taken from the 5th stage rear extraction port of the high pressure cylinder, the parameter is p 1 , t 1 The steam passes through the 0 pump check valve 1, the 0 pump electric valve 2, the 0 pump pipeline regulating valve 3 and the 0 high steam inlet electric valve 4, and finally enters the 0 high heat to complete the steam-wa...

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Abstract

A hierarchical control and operation method for No. 0 high-increase operation of a power station unit under multiple working conditions, comprising the following steps: (1) specifying the control target of No. 0 high-increase; (2) multi-working conditions for the operation of No. 0 high-increase Carry out modular division; (3) divide the control process into three-level control, this method can adapt to the automatic operation of No. To achieve the purpose of graded response and precise control, the adjusted quantity can be operated in the optimal range, and at the same time, it can provide early warning, accurate alarm and quick response in the face of abnormal conditions, which significantly improves the overall economy and safety of the unit.

Description

technical field [0001] The invention relates to the technical field of large-scale thermal power generator sets, in particular to a hierarchical control and operation method of No. 0 high-power generator set of a power station under multi-working conditions. Background technique [0002] As the conventional configuration of large ultra-supercritical thermal power units at present, the No. 0 high-power unit has obvious effects in realizing high efficiency and wide load and responding to rapid load changes of units. The addition of No. 0 high-speed heater can effectively increase the feedwater temperature of the thermal power unit at low load, making it close to the optimal feedwater temperature, thereby increasing the flue gas temperature at the boiler outlet, ensuring the denitrification equipment to be put into operation as soon as possible, and improving the operating economy of the unit under low load as a whole . At the same time, it can also assist the unit to quickly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22D1/32F22D1/50F22B35/00
CPCF22B35/00F22D1/325F22D1/50
Inventor 宋晓辉辛志波牛利涛赵如宇王林李长海伍刚高景辉
Owner XIAN THERMAL POWER RES INST CO LTD
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