CN116292240A

CN116292240A - Quick response system and method for vacuum system abnormality early warning

Info

Publication number: CN116292240A
Application number: CN202310148584.6A
Authority: CN
Inventors: 李闯; 刘琼伟; 高晓亮; 李雪冰; 甘李; 李鹏竹; 陈杰; 李福山; 耿武扬
Original assignee: Jingneng Shiyan Thermoelectricity Co ltd
Current assignee: Jingneng Shiyan Thermoelectricity Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-23

Abstract

The invention discloses a rapid response system and a rapid response method for vacuum system abnormality early warning, and relates to the technical field of thermal control of vacuum systems. According to the invention, the vacuum pump current, the vacuum system investment, the shaft seal steam supply valve opening, the shaft seal pressure, the circulating water temperature, the pressure behind the non-operated vacuum pump inlet valve and the steam-water separator liquid level of the vacuum system are monitored in real time in a mode of an analog circuit, and the abnormal state problem in the operation of the vacuum system is distinguished by utilizing various judging conditions. The early warning information judged by the invention can be quickly responded to the unit monitoring operation picture by the operator, so that the operator can be provided with accurate and timely early warning information, and the operator can make corresponding treatment in advance when a vacuum system has a problem, thereby ensuring the operation safety of the whole unit.

Description

Quick response system and method for vacuum system abnormality early warning

Technical Field

The invention relates to the technical field of thermal control of vacuum systems, in particular to a rapid response system and a rapid response method for early warning of vacuum system abnormality.

Background

In the vacuum systems in various fields, the operation state of the vacuum system needs to be closely monitored all the time, which is one of the important links of the thermodynamic cycle of the power plant and plays an important role in the safe production of the power plant. In the operation process of the vacuum system, the vacuum system is often in failure or even in failure shutdown because certain parameters deviate from the normal unit operation parameter values. The fault diagnosis of the current vacuum system usually relies on the experience judgment of the operator to find out the fault problem, or the operator is informed in advance by running the light word of the monitoring picture. The methods are difficult to accurately and timely locate the fault part of the vacuum system, so that the problems of fault cause judgment errors and untimely fault treatment frequently occur when the problems are treated. In addition, a monitoring system for the operation condition of the vacuum system is lacking, visual early warning information cannot be given to operators, corresponding processing is timely carried out when the vacuum system has a problem, and the operation safety of the whole unit is ensured.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a rapid response system and a rapid response method for early warning of the vacuum system, which can reasonably analyze and judge various abnormal operation conditions of the vacuum system and finally make correct early warning prompts and accurate processing instruction comments.

In order to achieve the above purpose, the invention adopts the following technical scheme: a quick response system for early warning of vacuum system abnormality comprises a quick vacuum rising fault early warning system of a unit and a fault early warning system of insufficient output of a vacuum pump;

the unit vacuum rapid rising fault early warning system comprises a comparison block N015, a comparison block N016, a subtraction block N018, a comparison block N023, a comparison block N024, a subtraction block N025, a subtraction block N028, a subtraction block N031, a non-block N037, a comparison block N040, a comparison block N017, a comparison block N021, a comparison block N022, a counting block N038 and a comparison block N041;

the input end of the comparison smaller than the block N015 is connected with an analog input block N001 of the A or B vacuum pump current;

the input end smaller than the block N016 is respectively connected with an analog input block N002 of the pressure behind the inlet valve of the A or B vacuum pump and an analog constant block N003 of the local atmospheric pressure;

the input end of the subtracting block N018 is respectively connected with an analog input block N004 of the circulating water temperature of the vacuum pump A or B and an analog input block N005 of 10min before the circulating water temperature of the vacuum pump A or B; the output end of the subtracting block N018 is sequentially connected with an absolute value block N019 in series, and the comparison is larger than the block N020;

the input end of the comparison smaller than the block N023 is connected with an analog input block N006 of the unit vacuum;

The input end of the comparison larger than the block N024 is connected with an analog input block N007 of the opening degree of the shaft seal steam supply and adjustment door;

the input end of the subtraction block N025 is respectively connected with an analog input block N008 of the shaft seal pressure and an analog input block N009 of 1min before the shaft seal pressure; the output end of the subtraction block N025 is sequentially connected with an absolute value block N026 and a comparison block N027 in series;

the input end of the subtracting block N028 is respectively connected with an analog input block N001 of the vacuum pump current A or B and an analog input block N010 1min before the vacuum pump current A or B; the output end of the subtracting block N028 is sequentially connected with an absolute value block N029 and a comparison block N030 in series;

the input end of the subtracting block N031 is respectively connected with an analog input block N011 of the cooling water temperature of the vacuum pump A or B and an analog input block N012 of 1min before the cooling water temperature of the vacuum pump A or B; the output end of the subtraction block N031 is sequentially connected with an absolute value block N032, a comparison smaller than the block N033, a AND block N034, a delay block N035 and a pulse block N036 in series;

the input end of the non-block N037 is connected with the output end of the pulse block N036, and the output end of the non-block N037 is connected with the input end of the block N034;

the input end of the module N040 with the comparison value is connected with an analog input module N001 of the vacuum pump current A or B;

The input end of the AND block N017 is respectively connected with the output end smaller than the block N015, the output end smaller than the block N016 and the output end smaller than the block N023; the output end of the block N017 is connected with a unit vacuum fast rising fault early warning switching value output block N042;

the input end of the AND block N021 is respectively connected with the output end which is larger than the block N020 and the output end which is smaller than the block N023; the output end of the block N021 is connected with a unit vacuum fast rising fault early warning switching value output block N043;

the input end of the AND block N022 is respectively connected with the output end which is smaller than the block N023, the output end which is larger than the block N024 and the output end which is larger than the block N027; the output end of the block N022 is connected with a unit vacuum rapid rising fault early warning switching value output block N044;

the input end of the counting block N038 is respectively connected with the output end of the comparing block N030, the output end of the comparing block N033 and the output end of the pulse block N036; the output end of the counting block N038 is connected with the input end which is larger than the block N039;

the input end of the AND block N041 is respectively connected with the output end smaller than the block N023, the output end larger than the block N039 and the output end larger than the block N040; the output end of the block N041 is connected with a unit vacuum fast rising fault early warning switching value output block N045.

On the basis of the technical scheme, the vacuum pump output deficiency fault early warning system comprises a subtraction block N046, a subtraction block N049, a non-block N055, a comparison block N059, a subtraction block N060, a comparison block N063, a counting block N056, a sum block N058 and a sum block N064;

the input end of the subtracting block N046 is respectively connected with an analog input block N001 of the vacuum pump current A or B and an analog input block N010 1min before the vacuum pump current A or B; the output end of the subtraction block N046 is sequentially connected with an absolute value block N047 and a comparison block N048 in series;

the input end of the subtraction block N049 is respectively connected with an analog input block N011 of the cooling water temperature of the vacuum pump A or B and an analog input block N012 of 1min before the cooling water temperature of the vacuum pump A or B; the output end of the subtraction block N049 is sequentially connected with an absolute value block N050, a comparison smaller than the block N051, a block N052, a delay block N053 and a pulse block N054 in series;

the input end of the non-block N055 is connected with the output end of the pulse block N054, and the output end of the non-block N055 is connected with the input end of the block N052;

the input end of the larger than block N059 is connected with an analog input block N001 of the A or B vacuum pump current;

the input end of the subtraction block N060 is respectively connected with an analog input block N001 of the vacuum pump current A or B and an analog input block N010 1min before the vacuum pump current A or B; the output end of the subtraction block N060 is sequentially connected with an absolute value block N061 and a comparison block N062 in series;

The input end of the comparison smaller than the block N063 is respectively connected with an analog input block N013 of the liquid level of the A or B steam-water separator and an analog constant block N014 of the liquid level of the steam-water separator with a low fixed value;

the input end of the counting block N056 is respectively connected with the output end which is larger than or equal to the output end of the block N048, the output end which is smaller than the block N051 and the output end of the pulse block N054; the output end of the counting block N056 is connected with the input end which is larger than the input end of the block N057;

the input end of the AND block N058 is respectively connected with the output end which is larger than the block N057 and the output end which is larger than the block N059; the output end of the block N058 is connected with a vacuum pump output insufficient fault early warning switching value output block N065;

the input end of the AND block N064 is respectively connected with the output end which is larger than the block N059, the output end which is larger than the block N062 and the output end which is smaller than the block N063; the output end of the block N064 is connected with a vacuum pump output insufficient fault early warning switching value output block N066.

The invention also provides a method for quickly responding to the system based on the vacuum system abnormality early warning, which is characterized in that: the unit vacuum rapid rising fault early warning system can send out four fault situations, which are respectively:

An inlet valve of the vacuum pump set A or B is internally leaked;

the circulating water temperature rises, the standby pump is started, and the circulating water temperature is reduced;

the shaft seal pressure is abnormal, and the shaft seal pressure of the steam turbine is timely adjusted;

the vacuum system is put into, the vacuum pump has abnormal force, please check the running state of the vacuum pump on the spot, and switch the standby pump in time;

the vacuum pump insufficient output fault early warning system can send out two fault situations, namely:

the vacuum pump has abnormal force, please check the running state of the vacuum pump on site, and switch the standby pump in time;

the steam-water separator has low liquid level and is used for checking whether the water supplementing pipeline is normal or not on site.

Based on the technical scheme, the specific steps of pushing the internal leakage fault condition of the inlet valve of the vacuum pump set A or B are as follows:

the analog quantity of the A or B vacuum pump current is input into a block N001 as an input end which is smaller than the block N015, and is compared with a fixed value 3A, if the analog quantity is true, a switching value signal 1 is output, which indicates that the A or B vacuum pump is not operated at the moment, namely, the A or B vacuum pump current value is smaller than 3A, and otherwise, 0 is output;

the analog quantity input block N002 of the pressure behind the inlet valve of the vacuum pump A or B and the analog quantity constant block N003 of the local atmospheric pressure are used as input ends which are smaller than the block N016, if the analog quantity input block N002 is true, a switching value signal 1 is output, the pressure behind the inlet valve of the vacuum pump which is not operated at the moment is lower than the local atmospheric pressure and is negative, otherwise, 0 is output;

The analog quantity input block N006 of the unit vacuum is used as an input end smaller than the block N023, if the analog quantity input block is true, a switching value signal 1 is output, the input of a vacuum system is represented, and otherwise, 0 is output;

the output end smaller than the block N015, the output end smaller than the block N016 and the output end smaller than the block N023 are used as the input end of the block N017 and are connected with the output end of the block N017 and the unit vacuum fast rising fault early warning 1 switch value output block N042;

and when the vacuum pump A or B does not operate and the pressure behind the vacuum pump inlet valve is lower than the local atmospheric pressure, and the vacuum system is put into operation, pushing the internal leakage fault condition of the vacuum pump inlet valve A or B if the conditions are met.

Based on the technical scheme, the pushing circulation water temperature is increased, the standby pump is started, and the concrete steps of reducing the fault condition of the circulation water temperature are as follows:

an analog quantity input block N004 of the circulating water temperature of the vacuum pump A or B and an analog quantity input block N005 of the circulating water temperature of the vacuum pump A or B, which is 10 minutes before the circulating water temperature of the vacuum pump A or B, are used as input ends of a subtraction block N018, and represent fluctuation change of the circulating water temperature of the vacuum pump A or B within 10 minutes;

the output end of the subtracting block N018 is used as the input end of the absolute value block N019, the output end of the absolute value block N019 is used as the input end which is larger than the block N020, and the absolute value block N019 is compared with a fixed value of 5 ℃, so that the fluctuation change value of the circulating water temperature of the vacuum pump A or B within 10min is larger than the fixed value of 5 ℃, if the fluctuation change value of the circulating water temperature of the vacuum pump A or B within 10min is larger than the fixed value of 5 ℃, a switching value signal 1 is output, and otherwise, 0 is output;

The output end which is larger than the block N020 and the output end which is smaller than the block N023 are used as the input end of the block N021 and are connected with the output end of the block N021 and the unit vacuum fast rising fault early warning 2 switching value output block N043;

when the fluctuation change value of the circulating water temperature of the vacuum system input A or B vacuum pump within 10min is larger than the fixed value of 5 ℃, if the conditions are met, the circulating water temperature is pushed to rise, the standby pump is started, and the fault condition of the circulating water temperature is reduced.

Based on the technical scheme, the pushing shaft seal pressure is abnormal, and the specific steps for timely adjusting the fault condition of the shaft seal pressure of the steam turbine are as follows:

an analog quantity input block N007 of the opening degree of the shaft seal steam supply regulating valve is used as an input end of a relatively larger block N024 and is compared with a fixed value of 5%, if the analog quantity input block is true, a switching quantity signal 1 is output, and otherwise, 0 is output;

the analog input block N008 of the shaft seal pressure and the analog input block N009 of the shaft seal pressure 1min before are used as the input ends of the subtraction block N025 to represent the fluctuation change of the shaft seal pressure within 1 min;

the output end of the subtracting block N025 is used as the input end of the absolute value block N026, the output end of the absolute value block N026 is used as the input end of the block N027 which is larger than the absolute value block N027, and the absolute value block N026 is compared with the fixed value 10kPa, so that the fluctuation change value of the shaft seal pressure within 1min and the fixed value 10kPa are larger than the comparison, if the fluctuation change value of the shaft seal pressure within 1min and the fixed value 10kPa are larger than the fixed value, a switching value signal 1 is output, and otherwise, 0 is output;

The output end smaller than the block N023, the output end larger than the block N024 and the output end larger than the block N027 are used as the input end of the block N022 and are connected with the output end of the block N022 and the unit vacuum rapid rising fault early warning 3 switch value output block N044;

the vacuum system input, the opening degree of the shaft seal steam supply regulating valve is more than 5%, the fluctuation change value of the actual shaft seal pressure within 1min is more than 10kPa, if the conditions are met, the shaft seal pressure is pushed to be abnormal, and the fault condition of the shaft seal pressure of the steam turbine is timely regulated.

Based on the technical scheme, the pushing vacuum system is already put into, the vacuum pump has abnormal output, please check the running state of the vacuum pump on the spot, the specific steps of timely switching the fault situation of the standby pump are as follows:

the analog quantity input block N001 of the vacuum pump current A or B, the analog quantity input block N010 of the vacuum pump current A or B1 min before the vacuum pump current A or B are used as the input end of the subtracting block N028, and represent the fluctuation change of the vacuum pump current A or B within 1 min;

the output end of the subtracting block N028 is used as the input end of the absolute value block N029, the output end of the absolute value block N029 is used as the input end of the comparison larger than the block N030, and the comparison is carried out with the fixed value 1A, so that the fluctuation change value of the vacuum pump current A or B within 1min is larger than the fixed value 1A, if the fluctuation change value of the vacuum pump current A or B within 1min is larger than the fixed value 1A, the switching value signal 1 is output, and otherwise, 0 is output;

The analog quantity input block N011 of the cooling water temperature of the vacuum pump A or B and the analog quantity input block N012 of 1min before the cooling water temperature of the vacuum pump A or B are used as the input ends of the subtraction block N031, and represent the fluctuation change of the cooling water temperature of the vacuum pump A or B within 1 min;

the output end of the subtracting block N031 is used as the input end of the absolute value block N032, the output end of the absolute value block N032 is used as the input end smaller than the absolute value block N033, and the absolute value block N032 is compared with a fixed value 1 ℃, so that the fluctuation change value of the cooling water temperature of the vacuum pump A or B within 1min and the fixed value 1 ℃ are smaller than the comparison, if yes, a switching value signal 1 is output, and otherwise, 0 is output;

the output end smaller than the block N033 is used as the input end of the and block N034, the output end of the and block N034 is used as the input end of the delay block N035, the constant value is set to 60s in the delay block N035, the output end of the delay block N035 is used as the input end of the pulse block N036, the constant value is set to 0.5s in the pulse block N036, the output end of the pulse block N036 is used as the input end of the non-block N037, and the output end of the non-block N037 is also used as the input end of the and block N034;

the output end larger than the block N030 is used as the input end of the counting block N038, the output end smaller than the block N033 is used as the EN enabling end of the counting block N038, the output end of the pulse block N036 is used as the R resetting end of the counting block N038, when the fluctuation change value of the cooling water temperature of the A or B vacuum pump in 1min is smaller than the fixed value of 1 ℃, counting is started, the result triggered by the fluctuation change value of the current of the A or B vacuum pump in 1min being larger than the fixed value of 1A is counted, the counting time is 1min, and if the fluctuation change value exceeds 1min, the counting is restarted;

The output end of the counting block N038 is used as the input end of the comparing block N039 and is compared with the fixed value 5 in a larger way, when the fluctuation change value of the A or B vacuum pump current in 1min is larger than the fixed value 1A and more than 5 times occur in 1min, if so, a switching value signal 1 is output, otherwise, 0 is output;

the analog quantity of the vacuum pump current A or B is input into a block N001 as an input end of a larger block N040, and is compared with a fixed value 3A, the vacuum pump current A or B and the fixed value 3A are compared more, if the comparison is true, a switching value signal 1 is output, and otherwise, 0 is output;

the output end smaller than the block N023, the output end larger than the block N039 and the output end larger than the block N040 are used as the input end of the block N041 and are connected with the output end of the block N041 and the unit vacuum rapid rising fault early warning 4 switch value output block N045;

the method is characterized in that the operation of the vacuum pump A or B, the input of the vacuum system, the fluctuation change value of the vacuum pump current A or B in 1min is larger than the fixed value 1A, more than 5 times of the vacuum pump cooling water temperature is normal in 1min, if the conditions are met, the vacuum system is pushed to be input, the vacuum pump output is abnormal, the operation state of the vacuum pump is checked on site, and the fault condition of the standby pump is switched in time.

Based on the technical scheme, the pushing vacuum pump has abnormal output, and the on-site inspection of the running state of the vacuum pump is carried out, and the specific steps of timely switching the fault situation of the standby pump are as follows:

the analog quantity input block N001 of the vacuum pump current A or B, the analog quantity input block N010 of the vacuum pump current A or B1 min before the vacuum pump current A or B are used as the input end of the subtracting block N046, and represent the fluctuation change of the vacuum pump current A or B within 1 min;

the output end of the subtracting block N046 is used as the input end of the absolute value block N047, the output end of the absolute value block N047 is used as the input end of the relatively larger or equal block N048, and is compared with the fixed value 1A, the fluctuation change value of the A or B vacuum pump current in 1min is compared with the fixed value 1A more or equal, if the fluctuation change value of the A or B vacuum pump current in 1min is more or equal to the fixed value 1A, the switching value signal 1 is output, and otherwise, the switching value signal 0 is output;

the analog quantity input block N011 of the cooling water temperature of the vacuum pump A or B and the analog quantity input block N012 of 1min before the cooling water temperature of the vacuum pump A or B are used as the input ends of the subtraction block N049, and represent the fluctuation change of the cooling water temperature of the vacuum pump A or B within 1 min;

the output end of the subtracting block N049 is used as the input end of the absolute value block N050, the output end of the absolute value block N050 is used as the input end of the comparison smaller than the block N51, and the comparison is carried out with the fixed value 1 ℃, so that the fluctuation change value of the cooling water temperature of the vacuum pump A or B within 1min is represented to be smaller than the fixed value 1 ℃, if the fluctuation change value of the cooling water temperature of the vacuum pump A or B within 1min is true, the switching value signal 1 is output, and otherwise, the switching value signal 0 is output;

The output end smaller than the block N051 is used as the input end of the block N052, the output end of the block N052 is used as the input end of the delay block N053, the output end of the delay block N53 is used as the input end of the pulse block N054, the output end of the pulse block N054 is used as the input end of the non-block N055, and the output end of the non-block N055 is also used as the input end of the block N052;

the output end of the pulse block N054 is used as the R reset end of the counting block N056, the fluctuation change value of the cooling water temperature of the vacuum pump A or B in 1min is smaller than the fixed value 1 ℃, the counting is started, the result triggered by the fluctuation change value of the current of the vacuum pump A or B in 1min being larger than or equal to the fixed value 1A is counted, the counting time is 1min, and the counting is restarted if the fluctuation change value exceeds 1 min;

the output end of the counting block N056 is used as the input end of the comparing block N057 and is compared with the fixed value 5 in a larger way, when the fluctuation change value of the A or B vacuum pump current in 1min is larger than the fixed value 1A and more than 5 times occur in 1min, if so, a switching value signal 1 is output, otherwise, 0 is output;

the analog quantity of the vacuum pump current A or B is input into a block N001 as an input end of a larger than block N059 and is compared with a fixed value 3A, the vacuum pump current A or B and the fixed value 3A are compared more, if the comparison is true, a switching value signal 1 is output, and otherwise, 0 is output;

The output end which is larger than the block N057 and the output end which is larger than the block N059 are used as the input end of the block N058 and are connected with the output end of the block N058 and the output block N065 of the vacuum pump output shortage fault early warning 1 switch quantity;

the method is characterized in that the operation of the vacuum pump A or B is indicated, the fluctuation change value of the vacuum pump current A or B in 1min is larger than the fixed value 1A, more than 5 times occur in 1min, the cooling water temperature of the vacuum pump is normal, if the conditions are met, the pushing vacuum pump is abnormal in force, the operation state of the vacuum pump is checked on site, and the fault condition of the standby pump is switched in time.

Based on the technical scheme, the specific steps of pushing the steam-water separator to have low liquid level and checking whether the water supplementing pipeline has normal fault conditions on site are as follows:

the analog quantity input block N001 of the vacuum pump current A or B, the analog quantity input block N010 of the vacuum pump current A or B1 min before the vacuum pump current A or B are used as the input end of the subtracting block N060, and represent the fluctuation change of the vacuum pump current A or B within 1 min;

the output end of the subtracting block N060 is used as the input end of the absolute value block N061, the output end of the absolute value block N061 is used as the input end of the comparison block N062 which is larger than the absolute value block N062, and the comparison is carried out with the fixed value 1A, the fluctuation change value of the vacuum pump current A or B in 1min is represented to be larger than or equal to the fixed value 1A, if the fluctuation change value is true, the switching value signal 1 is output, and otherwise, the switching value signal 0 is output;

The analog quantity input block N013 of the liquid level of the A or B steam-water separator and the analog quantity constant block N014 of the liquid level low constant value of the steam-water separator are used as the input ends which are smaller than the block N063, if yes, a switching value signal 1 is output, the liquid level of the A or B steam-water separator is lower than the liquid level low constant value of the steam-water separator at the moment, otherwise, 0 is output;

the output end which is larger than the block N059, the output end which is larger than the block N062 and the output end which is smaller than the block N063 are used as the input end of the block N064 and are connected with the output end of the block N064 and the vacuum pump output shortage fault early warning 2 switching value output block N066;

and (3) indicating that the A or B vacuum pump operates, indicating that the fluctuation change value of the A or B vacuum pump current within 1min is larger than a fixed value 1A, A or the liquid level of the B vapor-water separator is lower than the liquid level low fixed value of the vapor-water separator, and if the conditions are met, pushing the liquid level of the vapor-water separator to be low, and checking whether the water supplementing pipeline has a normal fault condition or not in situ.

The invention has the beneficial effects that:

when the rapid response system for the abnormal early warning of the vacuum system is specifically operated, the vacuum pump current, the vacuum system input, the shaft seal steam supply valve opening degree, the shaft seal pressure, the circulating water temperature, the pressure behind the non-operated vacuum pump inlet valve and the liquid level of the steam-water separator of the vacuum system are monitored in real time in a mode of an analog circuit, and the abnormal state problem in the operation of the vacuum system is distinguished by utilizing various judging conditions. The early warning information judged by the invention can be quickly responded to the unit monitoring operation picture by the operator, so that the operator can be provided with accurate and timely early warning information, and the operator can make corresponding treatment in advance when a vacuum system has a problem, thereby ensuring the operation safety of the whole unit.

Drawings

FIG. 1 is a schematic diagram of a unit vacuum rapid rise fault early warning system;

fig. 2 is a schematic structural diagram of a vacuum pump failure early warning system according to the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout.

The technical scheme and the beneficial effects of the invention are more clear and definite by further describing the specific embodiments of the invention with reference to the drawings in the specification. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.

Referring to fig. 1 and 2, the embodiment of the invention provides a rapid response system for early warning of vacuum system abnormality, which comprises a rapid unit vacuum rising fault early warning system and a vacuum pump insufficient output fault early warning system.

The unit vacuum rapid rising fault early warning system pushes the following four equipment system fault situations through a plurality of data and model combinations in N001-N066:

1) "leak in inlet valve of A or B vacuum pump group";

2) The circulating water temperature is increased, the standby pump is started, and the circulating water temperature is reduced;

3) "abnormal shaft seal pressure, please adjust the turbine shaft seal pressure in time";

4) The vacuum system is put into, the vacuum pump has abnormal force, the operation state of the vacuum pump is checked on site, and the standby pump is switched in time.

The vacuum pump output deficiency fault early warning system pushes the following two equipment system fault conditions through a plurality of data and model combinations in N001-N066:

1) "vacuum pump output is abnormal, please check the running state of the vacuum pump on site, switch the spare pump in time";

2) "the steam-water separator liquid level is low, check whether the water supplementing pipeline is normal on site.

The data and the model combination are preset, and the data of each analog input block come from the data of the real-time running state of each device received by the power plant DCS system.

The quick response system for the abnormal early warning of the vacuum system comprises an analog input block N001 of the current of the A or B vacuum pump, an analog input block N002 of the pressure behind an inlet valve of the A or B vacuum pump, an analog constant block N003 of the local atmospheric pressure, an analog input block N004 of the circulating water temperature of the A or B vacuum pump, an analog input block N005 of 10min before the circulating water temperature of the A or B vacuum pump, an analog input block N006 of the vacuum unit, an analog input block N007 of the opening degree of a shaft seal steam supply and regulation valve, an analog input block N008 of the shaft seal pressure, an analog input block N009 of 1min before the shaft seal pressure, an analog input block N010 of 1min before the current of the A or B vacuum pump, an analog input block N011 of the cooling water temperature of the A or B vacuum pump, an analog input block N012 of the liquid level of the A or B vacuum pump, an analog input block N013 of the liquid level of the steam-water separator, an analog constant block N014 of the liquid level low fixed value of the steam-water separator the comparison is smaller than a block N015, a comparison is smaller than a block N016, a comparison is smaller than a block N017, a subtraction block N018, an absolute value block N019, a comparison is larger than a block N020, a comparison is larger than a block N021, a comparison is larger than a block N022, a comparison is smaller than a block N023, a subtraction block N025, an absolute value block N026, a comparison is larger than a block N027, a subtraction block N028, an absolute value block N029, a comparison is larger than a block N030, a subtraction block N031, an absolute value block N032, a comparison is smaller than a block N033, a comparison is N034, a delay block N035, a pulse block N036, a non-block N037, a count block N038, a comparison is larger than a block N039, a comparison is larger than a block N040, a comparison block N041, a quick set vacuum rising fault early warning switching value output block N042, a quick set vacuum rising fault early warning switching value output block N043, a quick set vacuum rising fault early warning switching value output block N044, a quick set vacuum early warning output block N045; subtracting block N046, absolute value block N047, comparing greater than or equal to block N048, subtracting block N049, absolute value block N050, comparing less than block N051, and block N052, delay block N053, pulse block N054, non-block N055, counting block N056, comparing greater than block N057, and block N058, comparing greater than block N059, subtracting block N060, absolute value block N061, comparing greater than block N062, comparing less than block N063, and block N064, vacuum pump output shortage fault early warning switching value output block N065, vacuum pump output shortage fault early warning switching value output block N066;

Wherein, the output of the analog input block N001 of the A or B vacuum pump current is compared with the fixed value 3A by comparing the analog input block N015 with the fixed value;

the output of the absolute value block N019 is compared with a fixed value of 5 ℃ through comparing the absolute value block N020;

the output of the analog input block N006 of the unit vacuum is compared with a fixed value of 80kPa by comparing the analog input block N023 with a fixed value;

the output of an analog input block N007 of the opening degree of the shaft seal steam supply regulating valve is compared with a fixed value of 5% by comparing the analog input block N024 with the output of the analog input block N007;

the output of absolute value block N026 is compared greater than block N027 to a constant value of 10 kPa;

the output of absolute value block N029 is compared with a fixed value 1A by comparing greater than block N030;

the output of the absolute value block N032 is compared with a fixed value of 1 ℃ through comparing the absolute value block N033 with the fixed value;

the delay time of the delay block N035 is 60s;

the pulse time of pulse block N036 is 0.5s;

the output of the counting block N038 is compared with a fixed value 5 by comparing the output of the counting block N039 with the fixed value;

the output of the analog input block N001 of the A or B vacuum pump current is compared with a fixed value 3A by comparing the analog input block N015 with a larger value;

the output of absolute value block N047 is compared to a constant value 1A by comparing greater than block N048;

the output of the absolute value block N050 is compared with a fixed value of 1 ℃ through comparison of the absolute value block N051;

the delay time of the delay block N053 is 60s;

Pulse time of pulse block N054 is 0.5s;

the output of the counting block N056 is compared with a fixed value 5 by comparing the output of the counting block N057 with the fixed value 5;

the output of the analog input block N001 of the A or B vacuum pump current is compared with a fixed value 3A by comparing the analog input block N059 with a larger value;

the output of the absolute value block N061 is compared with a fixed value 1A through comparing the absolute value block N061 with the fixed value 1A;

1) The unit vacuum fast rising fault early warning 1 comprises:

the output end smaller than the block N015, the output end smaller than the block N016 and the output end smaller than the block N023 are used as the input end of the block N017 and are connected with the output end of the block N017 and the on-off quantity output block N042 of the unit vacuum rapid rising fault early warning 1,

When the vacuum pump A or B does not operate and the pressure after the vacuum pump inlet valve is lower than the local atmospheric pressure, if the conditions are met, pushing the valve A or B to leak inwards;

2) The unit vacuum fast rising fault early warning 2 comprises:

when the fluctuation change value of the circulating water temperature of the vacuum system input A or B vacuum pump within 10min is larger than the fixed value of 5 ℃, pushing the circulating water temperature to rise, starting a standby pump and reducing the circulating water temperature if the conditions are met;

3) The unit vacuum fast rising fault early warning 3 comprises:

the method is characterized in that the vacuum system input, the opening degree of a shaft seal steam supply regulating valve is more than 5%, the fluctuation change value of the actual shaft seal pressure within 1min is more than 10kPa, and if the conditions are met, the shaft seal pressure abnormality is pushed, and the shaft seal pressure of the steam turbine is timely regulated;

4) The unit vacuum fast rising fault early warning 4 comprises:

the method comprises the steps of representing that a vacuum pump A or B is operated, a vacuum system is put into, the fluctuation change value of the vacuum pump current A or B in 1min is larger than a fixed value 1A, more than 5 times occur in 1min, the cooling water temperature of the vacuum pump is normal, if the conditions are met, pushing the vacuum system to be put into, the vacuum pump is abnormal in force, checking the operation state of the vacuum pump on site, and switching the standby pump in time;

5) The vacuum pump insufficient output fault early warning 1 comprises:

the method is characterized in that the method comprises the steps that A or B vacuum pumps run, the fluctuation change value of the current of the A or B vacuum pumps in 1min is larger than a fixed value 1A, more than 5 times occur in 1min, the cooling water temperature of the vacuum pumps is normal, if the conditions are met, the vacuum pumps are pushed to have abnormal force, the running state of the vacuum pumps is checked on site, and the standby pumps are switched in time;

6) The vacuum pump insufficient output fault early warning 2 comprises:

and (3) indicating that the A or B vacuum pump operates, indicating that the fluctuation change value of the A or B vacuum pump current within 1min is larger than a fixed value 1A, A or that the liquid level of the B vapor-water separator is lower than the liquid level of the vapor-water separator by a fixed value, and if the conditions are met, pushing the vapor-water separator to be low, and checking whether the water supplementing pipeline is normal or not on site.

In the description of the present invention, a description of the terms "one embodiment," "preferred," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and a schematic representation of the terms described above in the present specification does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the invention, which modifications and adaptations are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A quick response system for vacuum system abnormality early warning is characterized in that: the device comprises a unit vacuum rapid rising fault early warning system and a vacuum pump insufficient output fault early warning system;

2. The rapid response system for vacuum system anomaly pre-warning of claim 1, wherein: the vacuum pump insufficient output fault early warning system comprises a subtracting block N046, a subtracting block N049, a non-block N055, a comparing block N059, a subtracting block N060, a comparing block N063, a counting block N056, a comparing block N058 and a comparing block N064;

3. The method of the fast response system based on the vacuum system abnormality pre-warning according to any one of claims 1 to 2, characterized in that: the unit vacuum rapid rising fault early warning system can send out four fault situations, which are respectively:

an inlet valve of the vacuum pump set A or B is internally leaked;

4. A method according to claim 3, wherein the specific step of pushing the leak failure condition in the inlet valve of the a or B vacuum pump stack is:

5. A method according to claim 3, wherein the pushing of the circulating water temperature increase, requesting the start of the backup pump, and the lowering of the circulating water temperature fault condition is performed by:

6. A method according to claim 3, wherein the pushing shaft seal pressure anomaly, requesting timely adjustment of turbine shaft seal pressure failure conditions, comprises the steps of:

7. A method according to claim 3, wherein the pushing vacuum system is already put into operation, the vacuum pump is abnormal in force, the operation state of the vacuum pump is checked in situ, and the specific steps for switching the fault situation of the standby pump in time are as follows:

8. A method according to claim 3, wherein the pushing vacuum pump has abnormal force, please check the operation state of the vacuum pump in situ, and the specific step of switching the fault situation of the standby pump in time is:

9. A method according to claim 3, wherein the specific step of pushing the steam-water separator to have a low liquid level and checking in situ whether the water replenishment line is in a normal fault condition is: