CN111001119B - Intelligent gas fire extinguishing system and method for multi-station fusion power machine room - Google Patents
Intelligent gas fire extinguishing system and method for multi-station fusion power machine room Download PDFInfo
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- CN111001119B CN111001119B CN201910984863.XA CN201910984863A CN111001119B CN 111001119 B CN111001119 B CN 111001119B CN 201910984863 A CN201910984863 A CN 201910984863A CN 111001119 B CN111001119 B CN 111001119B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
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- G06N7/02—Computing arrangements based on specific mathematical models using fuzzy logic
- G06N7/023—Learning or tuning the parameters of a fuzzy system
Abstract
The invention relates to the field of fire extinguishers, and discloses an intelligent gas fire extinguishing system and method for a multi-station fusion power machine room, which comprises an upper computer, a lower computer, a temperature sensor and a high-pressure gas tank, wherein the temperature sensor and the high-pressure gas tank are arranged in a cabinet; the air inlet valve is positioned at the bottom of the high-pressure air tank, one end of the air inlet valve is connected with the high-pressure flame-retardant air bin through an air guide pipe, and the other end of the air inlet valve is communicated with the high-pressure air tank; the air inlet valve and the differential pressure control valve are connected with the lower computer; the high-pressure gas tank is filled with high-pressure flame-retardant gas. The intelligent fire extinguishing system not only can intelligently control the opening of the air inlet valve, but also can quickly extinguish fire in time by monitoring the pressure difference between the inside and the outside of the fire extinguishing tank in real time as the pressure difference control valve is arranged on the fire extinguishing tank.
Description
Technical Field
The invention relates to the field of fire extinguishers, in particular to an intelligent gas fire extinguishing system and method for a multi-station integrated electric power machine room.
Background
The electric power computer lab has very important position in electric power system, and electronic information system computer lab equipment is complicated and various, and the asset is intensive place, must guarantee electronic equipment's normal operating, and the reason that takes place the conflagration mainly includes electric line short circuit, transships, contact resistance is too big and static etc. in case the computer lab takes place the conflagration, will cause the confusion of great loss and power dispatching order, so fire extinguishing system is the indispensable guarantee of electric power computer lab.
For example, a "fire extinguishing system" disclosed in chinese patent literature, which is disclosed under publication No. CN207024430U, includes a fire extinguisher, a solenoid valve, a cable, a fire detection controller, and a power source, wherein the power source is connected to the fire detection controller through the cable, the fire detection controller is connected to the solenoid valve for controlling the fire extinguisher to spray out a fire extinguishing agent, whether the fire extinguishing material of the fire extinguisher is sprayed out or not is controlled by the switch of the solenoid valve, and the fire extinguishing agent in the fire extinguisher is a fluorinated ketone type fire extinguishing agent. The utility model discloses a can't carry out the intelligent control of temperature, this utility model's of conflagration emergence control time lag is big moreover, fire extinguishing efficiency is low.
Disclosure of Invention
The invention aims to solve the problem of low fire extinguishing efficiency when a fire disaster occurs in an electric power machine room, and provides an intelligent gas fire extinguishing system and method for a multi-station integrated electric power machine room.
In order to achieve the purpose, the invention adopts the following technical scheme:
an intelligent gas fire extinguishing system of a multi-station fusion power machine room comprises an upper computer, a lower computer, a temperature sensor and a high-pressure gas tank, wherein the temperature sensor and the high-pressure gas tank are arranged in a cabinet; the air inlet valve is positioned at the bottom of the high-pressure air tank, one end of the air inlet valve is connected with the high-pressure flame-retardant air bin through an air guide pipe, and the other end of the air inlet valve is communicated with the high-pressure air tank; the air inlet valve and the differential pressure control valve are connected with the lower computer; the high-pressure gas tank is filled with high-pressure flame-retardant gas. The differential pressure control valve comprises a differential pressure controller, a driving circuit, a differential pressure sensor and an electromagnetic valve, wherein the differential pressure sensor is connected with the differential pressure controller, and the differential pressure controller is connected with the electromagnetic valve through the driving circuit.
The pressure difference control valve is arranged at the air outlet of the high-pressure air tank, the high-pressure air tank is in a normally closed state when a fire disaster does not happen, when the fire disaster happens in the cabinet, the temperature rises, the pressure intensity in the cabinet increases, the pressure difference sensor can detect the change of the pressure difference between the inside and the outside of the high-pressure air tank at the first time, then the valve is controlled to be opened by the pressure difference controller, and the high-pressure flame-retardant gas is released from the high-pressure air tank. Because the time lag of the temperature is comparatively big, can in time put out a fire through the automatic pressure measurement of differential pressure control valve very first time, not only can carry out the automatic control switching of differential pressure control valve through the pressure measurement, can also control differential pressure control valve through the lower computer. When a fire disaster occurs, the lower computer monitors the temperature in the cabinet to rise suddenly, and then the opening of the air inlet valve is controlled through the lower computer, so that the temperature in the cabinet is controlled. The whole system can be repeatedly utilized, so that the energy is saved, the utilization rate is high, and a powerful guarantee is provided for electric fire fighting.
Furthermore, the upper computer is provided with an alarm display module, an air inlet valve control module, a pressure difference control valve module and a temperature detection module, wherein the alarm display module is used for sending an alarm to remind workers when a fire disaster occurs and displaying the specific position of the fire disaster; the air inlet valve control module is used for directly controlling the air inlet valve of each high-pressure air tank by a worker; the pressure difference control valve module is used for displaying the pressure difference inside and outside the high-pressure gas tank and the pressure of the high-pressure flame-retardant gas in the high-pressure gas tank in time, so that a worker can directly control the pressure difference control valve of each high-pressure gas tank through an upper computer; and the temperature detection module is used for displaying the current temperature in each cabinet.
Further, the high pressure flame retardant gas comprises nitrogen and/or carbon dioxide.
The fire retardant in the high-pressure gas tank can only be gas but not liquid, and electrical elements can be damaged if liquid is used for extinguishing fire.
The upper computer and the lower computer are in communication connection by adopting an RS485 or CAN bus.
A control method of an intelligent gas fire extinguishing system of a multi-station fusion power machine room is characterized in that an air inlet valve and a pressure difference control valve are in a normally closed state when a fire disaster does not happen, and a set pressure v is filled in a high-pressure gas tank0Set a temperature low threshold value T2A high temperature threshold T and a low differential pressure threshold v, and a temperature sensor is utilized to monitor the cabinet in real timeThe internal temperature, the pressure difference inside and outside the high-pressure gas tank is monitored through a pressure difference control valve, and when the pressure difference is smaller than a pressure difference low threshold value v in the case of fire, the pressure difference control valve is automatically opened; when the temperature T is0When the temperature is higher than the high-threshold T, opening a pressure difference control valve and an air inlet valve, conducting high-pressure flame-retardant gas to a high-pressure gas tank, and controlling the opening of the air inlet valve by using a lower computer; when the temperature T is1Less than temperature low threshold T2When the pressure reaches the set pressure v, the pressure difference control valve is closed, the pressure of the high-pressure flame-retardant gas in the high-pressure gas tank is monitored, and when the pressure reaches the set pressure v0At this time, the intake valve is closed.
When a fire disaster does not happen, the air inlet valve and the pressure difference control valve are in a normally closed state, high-pressure flame-retardant gas with certain pressure intensity is filled in the high-pressure gas tank, once the fire disaster happens, the air inlet valve and the pressure difference control valve are opened, then the high-pressure flame-retardant gas is conducted to the cabinet to achieve the effect of fire extinguishment, and after the fire extinguishment is successful, the temperature is reduced to the temperature low threshold T2Closing the differential pressure control valve and then filling the set pressure v into the high-pressure gas tank0The whole high-pressure gas tank of the high-pressure flame-retardant gas with the size is restored to the original state, and the air inlet valve is closed.
Further, when the lower computer is used for controlling the opening of the air inlet valve, the lower computer adopts a double-ring fuzzy controller consisting of an estimation compensator and a fuzzy PID controller, and the method specifically comprises the following steps:
A) setting controller temperature given value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
B) The deviation signal e is used as the input of the fuzzy PID controller to obtain the output delta u of the fuzzy PID controllerPID；
C) Obtaining output delta u of pre-estimated compensatord；
D) Output of the fuzzy PID controllerPIDAnd estimate the output of the fuzzy compensator delta udAs a total control quantity
Δu＝ΔuPID+Δud；
E) The total control quantity delta u is converted into a voltage of 1-5V through a D/A converter, and then is converted into a current control signal Tu of 4-20mA through a voltage/current converter, so that the opening of the air inlet valve is controlled according to the current control signal Tu.
Further, a fuzzy PID controller, comprising:
B1) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KD；
B2) Obtaining a deviation signal e;
B3) acquiring a deviation signal range EP according to a preset PID parameter;
B4) if the deviation signal e is out of the deviation signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is in the deviation range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID(ii) a B5) If the deviation e is within the deviation range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID。
The whole cabinet temperature system has the characteristics of nonlinearity and uncertainty, the PID parameters are automatically adjusted by adopting a fuzzy PID controller, the time lag is high in the process of adjusting the opening, and the output quantity change estimated value is obtained by utilizing the pre-estimation compensator, so that the output of the controller is compensated.
Further, in step C), the output delta u of the estimated fuzzy compensator is obtaineddThe method comprises the following steps: setting time lag tau, calculating the difference delta u between current control quantity delta u (t) and control quantity before time lag tau, delta u (t) -delta u (t-tau), and obtaining the change trend of current output by using differentiator
According to the difference Deltau between the control amounts and the variation trend of the output
Obtaining the estimated value delta T of the output quantity change after the time lag time, wherein the estimated value delta T is T (T + tau) -T (T), and the estimated value delta T is used as the output delta u of the estimated fuzzy compensatord。
The time lag is large in the temperature regulation process, and in order to overcome the influence generated by the lag time, the output delta u of the fuzzy PID controller is output by the pre-estimated compensatorPIDCompensation is performed.
Further, when the lower computer is used for controlling the opening of the air inlet valve, the lower computer adopts a fuzzy PID controller, and the fuzzy PID controller comprises:
a) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KDSetting a given controller temperature value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
b) Taking the deviation signal e as the input of a fuzzy PID controller, and acquiring a deviation signal range EP according to a preset PID parameter;
c) if the deviation signal e is out of the deviation signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is in the deviation signal range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID(ii) a If the deviation signal e is in the deviation signal range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID；
d) Output of fuzzy PID controllerPIDThe voltage is converted into a voltage of 1 to 5V by a D/A converter, and then is converted into a current control signal Tu of 4 to 20mA by a voltage/current converter, so that the opening of the air inlet valve is controlled according to the current control signal Tu.
If the fire is small, the time lag of temperature regulation is smaller than that of serious fire, and the opening degree can be controlled by directly using a fuzzy PID controller.
The invention has the following beneficial effects: when a fire breaks out, the pressure difference control valve on the high-pressure gas tank is automatically opened through pressure measurement at the first time, so that the fire extinguishing efficiency is high; and the lower computer monitors the temperature change in the cabinet, and the opening of the air inlet valve is controlled by using a double-ring fuzzy controller or a fuzzy PID controller, so that the fire is quickly extinguished.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent gas fire extinguishing system of a multi-station integrated power room in the first embodiment.
FIG. 2 is a schematic diagram of a dual-loop fuzzy controller for temperature control according to an embodiment.
FIG. 3 is a schematic diagram of a temperature control system using a fuzzy PID controller according to a second embodiment.
Fig. 4 is a schematic structural view of a high-pressure gas tank according to an embodiment.
1. The device comprises a functional module, 2, an upper computer, 3, a lower computer, 4, a high-pressure gas tank, 5, a pressure difference control valve, 6, an air inlet valve, 7 and a high-pressure flame-retardant gas cabin.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
In the first embodiment, as shown in fig. 1, the intelligent gas fire extinguishing system for the multi-station integrated power machine room comprises an upper computer 2, a lower computer 3, a temperature sensor and three high-pressure gas tanks 4, wherein the temperature sensor and the three high-pressure gas tanks 4 are arranged in a cabinet, the upper computer 2 is in communication connection with the lower computer 3 through a CAN bus, as shown in fig. 4, an air inlet valve 6 and a differential pressure control valve 5 located at an air outlet of the high-pressure gas tanks are arranged at the bottoms of the high-pressure gas tanks, and the differential pressure control valve 5 is communicated with the high-pressure gas tanks; one end of the air inlet valve 6 is connected with the high-pressure flame-retardant gas bin 7 through an air guide pipe, and the other end of the air inlet valve 6 is communicated with the high-pressure gas tank; the air inlet valve 6 and the differential pressure control valve 5 are both connected with the lower computer 3; the high-pressure gas tank is filled with a set pressure v0The high-pressure flame-retardant gas is nitrogen.
The differential pressure control valve comprises a differential pressure controller, a differential pressure sensor and an electromagnetic valve, wherein the differential pressure sensor is connected with the differential pressure controller, and the differential pressure controller is connected with the electromagnetic valve through a driving circuit.
The upper computer 2 is provided with a functional module 1 which comprises an alarm display module I, an air inlet valve control module II, a pressure difference control valve module III and a temperature detection module IV, wherein the alarm display module I is used for giving an alarm to remind workers when a fire disaster occurs and displaying the specific position of the fire disaster; the air inlet valve control module II enables workers to directly control air inlet valves of the high-pressure air tanks; the pressure difference control valve module III is used for displaying the pressure difference inside and outside the high-pressure gas tank and the pressure of the high-pressure flame-retardant gas in the high-pressure gas tank in time, and workers can directly control the pressure difference control valve of each high-pressure gas tank through an upper computer; and the temperature detection module is used for displaying the current temperature in each cabinet.
A control method of an intelligent gas fire extinguishing system of a multi-station fusion power machine room is characterized in that an air inlet valve and a pressure difference control valve are in a normally closed state when a fire disaster does not happen, and a set pressure v is filled in a high-pressure gas tank0Set a temperature low threshold value T2The temperature in each cabinet is monitored in real time by using a temperature sensor, the pressure difference inside and outside the high-pressure gas tank is monitored by using a pressure difference control valve, and when a fire breaks out, the pressure difference is detected to be smaller than the pressure difference low threshold value v, and the pressure difference control valve is automatically opened; simultaneously the lower computer detects the temperature T of the cabinet0And (4) opening the air inlet valve when the temperature is higher than the high temperature threshold value T, and conducting high-pressure flame-retardant gas to the high-pressure gas tank.
When utilizing the lower computer to control the aperture of admission valve, the lower computer adopts the dicyclo fuzzy controller that pre-estimate compensator and fuzzy PID controller constitute, specifically includes:
A) setting controller temperature given value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
B) The deviation signal e is used as the input of the fuzzy PID controller to obtain the output delta u of the fuzzy PID controllerPIDThe method comprises the following steps: B1) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KD；
B2) Obtaining a deviation signal e;
B3) acquiring a deviation signal range EP according to a preset PID parameter;
B4) if the deviation signal e is in the deviation signalOutside the signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is within the deviation range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID(ii) a B5) If the deviation e is within the deviation range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID。
C) Obtaining output delta u of pre-estimated compensatordThe method comprises the following steps: setting time lag tau, calculating the difference delta u between current control quantity delta u (t) and control quantity before time lag tau, delta u (t) -delta u (t-tau), and obtaining the change trend of current output by using differentiator
According to the difference Deltau between the control amounts and the variation trend of the output
Obtaining the estimated value delta T of the output quantity change after the time lag time, wherein the estimated value delta T is T (T + tau) -T (T), and the estimated value delta T is used as the output delta u of the estimated fuzzy compensatord。
D) Output of the fuzzy PID controllerPIDAnd estimate the output of the fuzzy compensator delta udAs a total control quantity Δ u, the algebraic sum of (a) and (b) is Δ uPID+Δud；
E) The total control amount Δ u is converted into a voltage of 1 to 5V through a D/a converter, and then converted into a current control signal Tu of 4 to 20mA through a voltage/current converter, thereby controlling the opening of the intake valve according to the current control signal Tu.
When the temperature T is1Less than temperature low threshold T2When the pressure reaches the set pressure v, the pressure difference control valve is closed, the pressure of the high-pressure flame-retardant gas in the high-pressure gas tank is monitored, and when the pressure reaches the set pressure v0At this time, the intake valve is closed.
In the second embodiment, the first embodiment of the method,
a control method for an intelligent gas fire extinguishing system of a multi-station integrated power machine room, which is an alternative to the first embodiment, as shown in fig. 2, in this embodiment, when a fire disaster occurs and a lower computer is used to control the opening of an air inlet valve, the lower computer uses a fuzzy PID controller, which includes:
a) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KDSetting a given controller temperature value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
b) Taking the deviation signal e as the input of a fuzzy PID controller, and acquiring a deviation signal range EP according to a preset PID parameter;
c) if the deviation signal e is out of the deviation signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is in the deviation signal range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID(ii) a If the deviation signal e is in the deviation signal range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID；
d) Output of fuzzy PID controllerPIDThe voltage is converted into a voltage of 1 to 5V by a D/A converter, and then is converted into a current control signal Tu of 4 to 20mA by a voltage/current converter, so that the opening of the air inlet valve is controlled according to the current control signal Tu. The rest steps are the same as the first embodiment.
When a fire disaster happens, the pressure difference control valve on the high-pressure gas tank is automatically opened through pressure measurement at the first time, the lower computer monitors the temperature change in the cabinet, and the double-ring fuzzy controller or the fuzzy PID controller is used for controlling the opening degree of the gas inlet valve to quickly extinguish the fire.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (2)
1. A control method of an intelligent gas fire extinguishing system of a multi-station fusion power machine room is adopted, and the intelligent gas fire extinguishing system of the multi-station fusion power machine room is characterized by comprising an upper computer, a lower computer, a temperature sensor and a high-pressure gas tank, wherein the temperature sensor and the high-pressure gas tank are arranged in a cabinet; the air inlet valve is positioned at the bottom of the high-pressure air tank, one end of the air inlet valve is connected with the high-pressure flame-retardant air bin through an air guide pipe, and the other end of the air inlet valve is communicated with the high-pressure air tank; the air inlet valve and the differential pressure control valve are connected with the lower computer; high-pressure flame-retardant gas is filled in the high-pressure gas tank; the upper computer is provided with an alarm display module, an air inlet valve control module, a pressure difference control valve module and a temperature detection module, wherein the alarm display module is used for sending an alarm to remind workers when a fire disaster occurs and displaying the specific position of the fire disaster; the air inlet valve control module is used for directly controlling the air inlet valve of each high-pressure air tank by a worker; the pressure difference control valve module is used for displaying the pressure difference between the inside and the outside of the high-pressure gas tank and the pressure of high-pressure flame-retardant gas in the high-pressure gas tank, so that a worker can control the pressure difference control valve of each high-pressure gas tank through an upper computer; the temperature detection module is used for displaying the current temperature in each cabinet; the upper computer and the lower computer are in communication connection by adopting an RS485 or CAN bus; the differential pressure control valve comprises a differential pressure controller, a driving circuit, a differential pressure sensor and an electromagnetic valve, wherein the differential pressure sensor is connected with the differential pressure controller, and the differential pressure controller is connected with the electromagnetic valve through the driving circuit;
the method comprises the following steps: the air inlet valve and the differential pressure control valve are in a normally closed state when no fire occurs, and the high-pressure air tank is filled with a set pressure v0Set a temperature low threshold value T2The temperature sensor is used for monitoring the temperature in the cabinet in real time, the pressure difference inside and outside the high-pressure gas tank is monitored through the pressure difference control valve, and when the pressure difference is smaller than the pressure difference low threshold value v in a fire disaster, the pressure difference control valve is automatically opened; when the temperature T is0When the temperature is higher than the high temperature threshold value T, the pressure difference control valve and the air inlet valve are opened, high-pressure flame-retardant gas is conducted to the high-pressure gas tank, and the high-pressure flame-retardant gas is utilizedThe lower computer controls the opening of the air inlet valve; when the temperature T is1Less than temperature low threshold T2When the pressure reaches the set pressure v, the pressure difference control valve is closed, the pressure of the high-pressure flame-retardant gas in the high-pressure gas tank is monitored, and when the pressure reaches the set pressure v0When so, closing the air inlet valve;
when the lower computer is used for controlling the opening of the air inlet valve, the lower computer adopts a double-ring fuzzy controller consisting of an estimation fuzzy compensator and a fuzzy PID controller, and the method specifically comprises the following steps:
A) setting controller temperature given value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
B) The deviation signal e is used as the input of the fuzzy PID controller to obtain the output delta u of the fuzzy PID controllerPID；
C) Obtaining output delta u of pre-estimated compensatord；
D) Output of the fuzzy PID controllerPIDAnd estimate the output of the fuzzy compensator delta udAs a total control quantity Δ u, the algebraic sum of (a) and (b) is Δ uPID+Δud；
E) Converting the total control quantity delta u into a voltage of 1 to 5V through a D/A converter, and converting the voltage into a current control signal Tu of 4 to 20mA through a voltage/current converter, so as to control the opening of the air inlet valve according to the current control signal Tu;
the fuzzy PID controller comprises:
B1) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KD；
B2) Obtaining a deviation signal e;
B3) acquiring a deviation signal range EP according to a preset PID parameter;
B4) if the deviation signal e is out of the deviation signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is in the deviation range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID；
B5) If the deviation e is within the deviation range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID(ii) a In step C), obtaining output delta u of the pre-estimated fuzzy compensatordThe method comprises the following steps: setting time lag tau, calculating the difference delta u between current control quantity delta u (t) and control quantity before time lag tau, delta u (t) -delta u (t-tau), and obtaining the change trend of current output by using differentiator
According to the difference Deltau between the control amounts and the variation trend of the output
Obtaining the estimated value delta T of the output quantity change after the time lag time, wherein the estimated value delta T is T (T + tau) -T (T), and the estimated value delta T is used as the output delta u of the estimated fuzzy compensatord；
When utilizing the next machine to control the aperture of admission valve, the next machine adopts fuzzy PID controller, includes:
a) setting PID parameters of the fuzzy PID controller, wherein the PID parameters comprise a proportional value KPIntegral value KIAnd the differential value KDSetting a given controller temperature value T3The current feedback signal T with the output range of 4 to 20mA is detected by a temperature sensor1Converting the signal into digital signal by A/D converter to obtain deviation signal e ═ T3-T1；
b) Taking the deviation signal e as the input of a fuzzy PID controller, and acquiring a deviation signal range EP according to a preset PID parameter;
c) if the deviation signal e is out of the deviation signal range EP, correcting the preset PID parameter by using a fuzzy control algorithm until the deviation signal e is in the deviation signal range EP, obtaining the corrected PID parameter, and calculating to obtain the output delta u of the fuzzy PID controllerPID(ii) a If the deviation signal e is in the deviation signal range EP, directly using PID algorithm to calculate and obtain the output delta u of the fuzzy PID controllerPID；
d) Output of fuzzy PID controllerPIDAfter conversion by D/A converterThe voltage is 1 to 5V, and then the voltage is converted into a current control signal Tu of 4 to 20mA through a voltage/current converter, so that the opening degree of the air inlet valve is controlled according to the current control signal Tu.
2. The control method of the intelligent gas fire extinguishing system for the multi-station converged power room according to claim 1, wherein the high-pressure flame retardant gas comprises nitrogen and/or carbon dioxide.
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