CN116222249A - Condenser water level control method - Google Patents
Condenser water level control method Download PDFInfo
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- CN116222249A CN116222249A CN202211575131.3A CN202211575131A CN116222249A CN 116222249 A CN116222249 A CN 116222249A CN 202211575131 A CN202211575131 A CN 202211575131A CN 116222249 A CN116222249 A CN 116222249A
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- water level
- condenser water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Electrical Variables (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention aims to provide a condenser water level control method, which is used for determining a condenser water level range and a target value according to condenser water level historical data; 2 condenser water level monitoring sensors are adopted to obtain a condenser water level value at the moment t; averaging the 2 condenser water level values at the moment t to obtain an average value of the condenser water level; taking an absolute value after the average value of the condenser water level at the moment t is differed from the target value to obtain an offset value; converting the deviation value into a proportional coefficient through linearization; acquiring a boiler steam pressure value at the moment t, and converting the boiler steam pressure value into an integral coefficient through linearization; and controlling the opening of the condenser water level regulating valve in real time according to the operation, thereby realizing the control of the condenser water level. According to the invention, 2 condenser water level monitoring sensors are adopted to monitor the condenser water level, so that the measuring error of the condenser water level can be reduced; the control accuracy can be improved by converting the boiler steam pressure value into an integral coefficient.
Description
Technical Field
The invention relates to a control method of a condenser, in particular to a water level control method.
Background
The condenser is the core device in the thermodynamic system and serves as a source of cooling water in the thermodynamic cycle. The height of the condenser water level has very important influence on the whole thermodynamic system, and if the condenser water level is not well controlled, the safety and the economy of the thermodynamic system are directly influenced. Therefore, the control of the condenser water level is an important link for ensuring the safe and stable operation of the thermodynamic system, and the quick and accurate control of the condenser water level is necessary.
Disclosure of Invention
The invention aims to provide a condenser water level control method capable of solving the problems of condenser water level control and the like.
The purpose of the invention is realized in the following way:
the invention relates to a condenser water level control method, which is characterized by comprising the following steps:
(1) Determining the water level range and the target value S of the condenser according to the historical data of the water level of the condenser P ；
(2) 2 condenser water level monitoring sensors are adopted to obtain condenser water level values L of the 2 condenser water level monitoring sensors at t time 1 (t) and L 2 (t)；
(3) The condenser water level value L at the moment t 1 (t) and L 2 (t) averaging to obtain an average value L of the condenser water level V (t)：
(4) Average value L of condenser water level at time t V (t) and the target value S P Taking absolute value after making difference to obtain a deviation value E (t):
E(t)＝|L V (t)-S P |；
(5) Converting the deviation value E (t) into a proportionality coefficient C through linearization P (t)：
(6) Acquiring a boiler steam pressure value P (t) at t momentAnd converts it into an integral coefficient C through linearization B (t)：
| Steam pressure value P (t) | Integral coefficient C B (t) |
| P(1) | C B (1) |
| P(2) | C B (2) |
| … | … |
| P(n) | C B (n) |
；
(7) The opening degree of the condenser water level regulating valve is controlled in real time, so that the condenser water level is controlled.
The invention may further include:
1. when the average value L of the condenser water level V (t) is smaller than the target value S P When the opening degree K (t) of the water level regulating valve of the condenser is increased according to the following steps:
when the average value L of the condenser water level V (t) is greater than the target value S P When the opening K (t) of the condenser water level regulating valve is closed according to the above mode;
wherein C is P (t)、C B And (t) and E (t) are respectively the proportional coefficient, the integral coefficient and the deviation value at the moment t.
The invention has the advantages that:
1. according to the invention, 2 condenser water level monitoring sensors are adopted to monitor the condenser water level, so that the measurement error can be reduced.
2. The invention converts the steam pressure value of the boiler into the integral coefficient, and can improve the control precision.
3. The invention can rapidly and accurately control the water level of the condenser through real-time operation.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
with reference to fig. 1, the technical scheme adopted by the invention is a condenser water level control method, which comprises the following steps:
(1) Determining the water level range and the target value S of the condenser according to the historical data of the water level of the condenser P 。
(2) 2 condenser water level monitoring sensors are adopted to obtain a condenser water level value L at the moment t 1 (t) and L 2 (t)。
(3) The condenser water level value L at the moment t 1 (t) and L 2 (t) averaging to obtain an average value L of the condenser water level V (t)。
(4) Average value L of condenser water level at time t V (t) and the target value S P Taking absolute value after making difference to obtain deviation value E (t).
E(t)＝|L V (t)-S P | (2)
(5) Converting the deviation value E (t) into a proportionality coefficient C through linearization P (t)。
| Deviation value E (t) | Scaling factor C P (t) |
| E(1) | C P (1) |
| E(2) | C P (2) |
| … | … |
| E(n) | C P (n) |
(6) The boiler steam pressure value P (t) at the moment t is obtained and converted into an integral coefficient C through linearization B (t)
| Steam pressure value P (t) | Integral coefficient C B (t) |
| P(1) | C B (1) |
| P(2) | C B (2) |
| … | … |
| P(n) | C B (n) |
(7) The opening degree of the condenser water level regulating valve is controlled in real time, so that the condenser water level is controlled.
a) When the average value L of the condenser water level V (t) is smaller than the target value S P And opening the condenser water level regulating valve according to the following formula.
b) When the average value L of the condenser water level V (t) is greater than the target value S P And (3) closing the opening K (t) of the condenser water level regulating valve according to the formula.
Wherein C is P (t)、C B And (t) and E (t) are respectively the proportional coefficient, the integral coefficient and the deviation value at the moment t.
Examples:
assume that a thermodynamic system is available to control the condenser water level.
(1) According to the historical data of the condenser water level, determining that the measuring range of the condenser water level is 0-700 mm and the target value S P 400mm.
(2) 2 condenser water level monitoring sensors are adopted to obtain a condenser water level value L at the moment t 1 (t) 320mm and L 2 (t) is 324mm.
(3) The condenser water level value L at the moment t 1 (t) and L 2 (t) averaging to obtain an average value L of the condenser water level V (t)。
(4) Average value L of condenser water level at time t V (t) and the target value S P Taking absolute value after making difference to obtain deviation value E (t).
E(t)＝|322-400|＝78mm
(5) Converting the deviation value E (t) into a proportionality coefficient C through linearization P (t)。
| Deviation value E (t) | Scaling factor C P (t) |
| 0 | 0 |
| … | … |
| 400 | 0.1 |
The proportion coefficient C is obtained by comparing the table P (t) was 0.02.
(6) The boiler steam pressure value P (t) at the moment t is obtained to be 3.5MPa, and is converted into an integral coefficient C through linearization B (t)。
| Steam pressure value P (t) | Integral coefficient C B (t) |
| 0 | 0 |
| … | … |
| 7 | 0.1 |
The integral coefficient C is obtained by comparing the table B (t) is 0.05.
(7) The opening degree of the condenser water level regulating valve is controlled in real time, so that the condenser water level is controlled.
Due to the average value L of the condenser water level V (t) is smaller than the target value S P Opening the opening K (t) of the water level regulating valve of the condenser is opened according to the formula (3).
K(t)＝0.02×78+0.05×78＝5.5。
Claims (2)
1. A condenser water level control method is characterized in that:
(1) Determining the water level range and the target value S of the condenser according to the historical data of the water level of the condenser P ；
(2) 2 condenser water level monitoring sensors are adopted to obtain condenser water level values L of the 2 condenser water level monitoring sensors at t time 1 (t) and L 2 (t)；
(3) The condenser water level value L at the moment t 1 (t) and L 2 (t) averaging to obtain an average value L of the condenser water level V (t)：
(4) Average value L of condenser water level at time t V (t) and the target value S P Taking absolute value after making difference to obtain a deviation value E (t):
E(t)＝|L V (t)-S P |；
(5) Converting the deviation value E (t) into a proportionality coefficient C through linearization P (t)：
；
(6) The boiler steam pressure value P (t) at the moment t is obtained and converted into an integral coefficient C through linearization B (t)：
；
(7) The opening degree of the condenser water level regulating valve is controlled in real time, so that the condenser water level is controlled.
2. The condenser water level control method according to claim 1, wherein:
when the average value L of the condenser water level V (t) is smaller than the target value S P When the opening degree K (t) of the water level regulating valve of the condenser is increased according to the following steps:
when the average value L of the condenser water level V (t) is greater than the target value S P When the opening K (t) of the condenser water level regulating valve is closed according to the above mode;
wherein C is P (t)、C B And (t) and E (t) are respectively the proportional coefficient, the integral coefficient and the deviation value at the moment t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211575131.3A CN116222249A (en) | 2022-12-08 | 2022-12-08 | Condenser water level control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211575131.3A CN116222249A (en) | 2022-12-08 | 2022-12-08 | Condenser water level control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116222249A true CN116222249A (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211575131.3A Pending CN116222249A (en) | 2022-12-08 | 2022-12-08 | Condenser water level control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116222249A (en) |
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2022
- 2022-12-08 CN CN202211575131.3A patent/CN116222249A/en active Pending
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