An automatic control method and system for the rolling gate of the antifreeze shed of the valve cooling system in a converter station

Abstract

The present invention relates to an automatic control method and system for the rolling gate of an antifreeze shed in a converter station valve cooling system. A wind direction collector collects the current wind direction information, and a temperature collector collects the current ambient temperature. The corresponding data is sent to a controller. The controller calculates the number of rolling gates to be opened according to the temperature information, determines the reference rolling gate on the windward side through the wind direction information, and calculates the addresses of the remaining rolling gates to be opened, that is, opens the rolling gates on both sides of the reference rolling gate. Then, the controller controls the actuator to open and close the rolling gates of a specified orientation and a specified number. Moreover, the higher the ambient temperature, the smaller the temperature difference of the water to be cooled, and the more rolling gates need to be opened to improve the cooling capacity. And all the rolling gates are in different opening and closing states in each detection cycle, which not only eliminates the need for manual opening of the rolling gates, but also avoids the accumulation of garbage formed by a large number of foreign objects floating in due to the failure to close the rolling gates in time, and avoids many problems such as the blockage of the air inlet of the fan by foreign objects.

Description

Technical Field

[0001] The present invention relates to the field of power auxiliary facilities, and particularly relates to an automatic control method and system for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station. Background Art

[0002] The converter valve is the core equipment in the converter station to complete the AC-DC conversion, which is composed of a large number of power thyristors. Because it frequently breaks high voltage and passes through large current, a large amount of heat will be generated. The converter valve is cooled by a water cooling system. Its working principle is to bring the heat of the converter valve to a large number of thin water pipes of the outdoor external cooling equipment through the circulation of water in the water cooling pipes, and then cool the thin water pipes by blowing air with a fan. To prevent the outdoor pipes from being frozen in low temperature in winter, it is necessary to configure an anti-freezing shed for the outdoor external cooling equipment and configure a rolling gate. The cooling capacity of the water cooling system is directly related to the ambient temperature of the anti-freezing shed, the number of fans turned on, and the number of rolling gates opened. The fan determines the air flow speed, and the rolling gate determines the air flow rate.

[0003] The above water cooling system has the defects that the ambient temperature of the anti-freezing shed is uncontrollable, the number of fans turned on is controlled by the valve cooling system, while the number of rolling gates opened is manually controlled by the operation and maintenance personnel and is not coordinated. Specifically, the operation and maintenance personnel judge the opening and closing of the rolling gate according to the ambient temperature. In winter, when the temperature is too low, a large number of rolling gates are closed; in summer, a large number of rolling gates are opened to maintain the relative stability of the cooling capacity. This method has problems such as insufficient timeliness, reliability, and randomness of manual control, which easily lead to abnormalities in the valve cooling system such as an increase in the temperature of the valve tower of the DC system, frequent start and stop of the fan, and frequent air replenishment of the nitrogen pressure stabilizing system. In addition, there are problems such as a large amount of foreign objects floating into the anti-freezing shed and garbage accumulation formed by untimely cleaning due to the long-term opening and disorderly management of the rolling gate. Summary of the Invention

[0004] Aiming at the defects that the rolling gate is manually opened, not coordinated with the control of the fan by the valve cooling system, and there are problems such as a large amount of foreign objects floating into the anti-freezing shed and garbage accumulation formed by untimely cleaning due to the long-term opening and disorderly management of the rolling gate, the present invention provides an automatic control system for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station to improve and solve the existing problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] In the first aspect, an automatic control method for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station includes the following control steps:

[0007] First, set the detection period parameter of the controller 4, then the controller 4 issues an initialization command at intervals, that is, initialize the wind direction collector 1 and the temperature collector 3;

[0008] Second, the controller 4 drives the wind direction collector 1 to collect the wind direction. After the wind direction collector 1 completes initialization, the controller 4 sends a wind direction query frame. Then the controller 4 receives the wind direction return frame. After that, the controller 4 performs CRC check on the return frame. If the check is qualified, the wind direction information is extracted; if the check is unqualified, initialization is performed.

[0009] Third, the controller 4 determines the reference rolling shutter door through the wind direction, that is, the rolling shutter door on the windward side is used as the reference rolling shutter door.

[0010] Fourth, the controller 4 drives the temperature collector 3 to collect the temperature. After the temperature collector 3 completes initialization, the controller 4 sends a temperature query command. Then the controller 4 receives the temperature return data and extracts the return data value. After that, the return data value is converted, and then the return temperature information is obtained. This return temperature information can be recognized and calculated by the controller 4.

[0011] Fifth, the controller 4 calculates the addresses of the rolling shutter doors to be opened, that is, the sorting of all rolling shutter doors with the reference rolling shutter door as the standard.

[0012] Sixth, the controller 4 sends a command to open the rolling shutter doors to open the rolling shutter doors on both sides of the reference rolling shutter door.

[0013] Seventh, the controller 4 sends a command to close the remaining rolling shutter doors to close the remaining rolling shutter doors that do not need to be opened.

[0014] In a second aspect, an automatic control system for the rolling shutter doors of the anti-freezing shed of the valve cooling system of a converter station includes a DC power supply, a wind direction collector 1, a converter 2, a temperature collector 3, a controller 4, and an actuator 5; the controller 4 is connected to the converter 2 through a second data line 9, the controller 4 is connected to the temperature collector 3 through a third data line 11, the controller 4 is connected to the actuator 5 through a fourth data line 12, and the controller 4 is connected to the DC power supply through a third power line 10; the converter 2 is connected to the DC power supply through a second power line 8 and is connected to the wind direction collector 1 through a first data line 7; the wind direction collector 1 is connected to the converter 2 through a first power line 6; the DC power supply provides various levels of DC electrical energy to provide electrical energy for the converter 2 and the controller 4 connected to it, and the converter 2 provides electrical energy for the wind direction collector 1; the actuator 5 is connected to the rolling shutter doors of the anti-freezing shed and controls the opening of the rolling shutter doors.

[0015] Further, the controller 4 selects an 8051 single-chip microcomputer. There are many types of 8051 single-chip microcomputers on the market, which are widely used, easy to purchase and replace, and the 8051 single-chip microcomputer requires a customized shell; the voltage level of the third power line 10 is DC5V, which is adapted to the 8051 single-chip microcomputer.

[0016] Furthermore, the temperature collector 3 selects a DS18B20 temperature sensor. The DS18B20 temperature sensor has various packaging forms. The packaging form suitable for outdoor installation conditions is a three-pin chip type, which adopts the I²C protocol and has good installability and environmental adaptability. The third data line 11 selects an I²C bus.

[0017] Furthermore, the wind direction collector 1 selects a digital wind direction sensor with an RS485 transmission method, which is suitable for outdoor installation conditions. The first data line 7 selects an RS485 transmission line. Adopting the RS485 transmission method has high anti-interference ability. The second data line 9 selects a TTL transmission line and is connected to the controller 4. The converter 2 selects an RS485 to TTL converter and is adapted to the 8051 single-chip microcomputer. The voltage levels of the first power line 6 and the second power line 8 are DC24V and are adapted to the digital wind direction sensor with the RS485 transmission method.

[0018] Furthermore, the actuator 5 selects an integrated low-voltage relay board, which has a compact structure and saves installation space. After the outlet of the low-voltage relay board, it is connected in parallel with the control relay control line for the opening and closing of the rolling gate. The fourth data line 12 selects a flat cable.

[0019] Beneficial effects of implementing the present invention:

[0020] In the present invention, the wind direction collector 1 collects the current wind direction information, and the temperature collector 3 collects the current ambient temperature. The corresponding data is sent to the controller 4. The controller 4 calculates the number of rolling gates that need to be opened according to the temperature information, determines the reference rolling gate on the windward side through the wind direction information, and calculates the addresses of the remaining rolling gates that need to be opened, that is, opens the rolling gates on both sides of the reference rolling gate. Then, the controller 4 controls the actuator 5 to open and close the specified number of rolling gates in the specified direction. Moreover, the higher the ambient temperature, the smaller the temperature difference of the water that needs to be cooled, and the more rolling gates need to be opened to improve the cooling capacity.

[0021] The present invention controls the number of rolling gates opened according to the temperature information, that is, controls the ventilation area according to the temperature, makes the cooling capacity of the valve cooling system relatively stable, avoids the occurrence of various abnormal working conditions, and improves the stability of the valve cooling system; opens the rolling gates on the leeward side according to the wind direction information, that is, opens the rolling gates on both sides of the reference rolling gate, and all the rolling gates of the antifreeze shed are in different opening and closing states in each detection cycle. It not only does not require manual opening of the rolling gates, but also avoids the accumulation of garbage formed by a large amount of foreign objects floating into the antifreeze shed due to the rolling gates not being closed in time, and also avoids many problems such as foreign objects blocking the air inlet of the fan.

[0022] The present invention adopts automatic control to replace manual control, saving manpower and material resources. At the same time, this automatic control system adopts a compatible technical solution, which not only retains all the functions of the original manual control mode but also ensures that the utility of this system is higher than that of the original system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 : Schematic diagram of the automatic control device for the rolling gate;

[0025] Figure 2 : Flow chart of the automatic control of the rolling gate;

[0026] In the figure: wind direction collector (1), converter (2), temperature collector (3), controller (4), actuator (5), first power line (6), first data line (7), second power line (8), second data line (9), third power line (10), third data line (11), fourth data line (12). DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In one embodiment of the present invention, please refer to the attached Figure 1 as shown:

[0029] An automatic control system for the anti-freezing shed rolling gate of a converter station valve cooling system, comprising a DC power supply, a wind direction collector 1, a converter 2, a temperature collector 3, a controller 4 and an actuator 5; the controller 4 is connected to the converter 2 through a second data line 9, the controller 4 is connected to the temperature collector 3 through a third data line 11, the controller 4 is connected to the actuator 5 through a fourth data line 12, and the controller 4 is connected to the DC power supply through a third power line 10; the converter 2 is connected to the DC power supply through a second power line 8 and is connected to the wind direction collector 1 through a first data line 7; the wind direction collector 1 is connected to the converter 2 through a first power line 6; the DC power supply provides various levels of DC electrical energy to supply electrical energy to the converter 2 and the controller 4 connected thereto, and the converter 2 supplies electrical energy to the wind direction collector 1; the actuator 5 is connected to the anti-freezing shed rolling gate and controls the opening of the rolling gate.

[0030] In the present invention, the wind direction collector 1 is arranged outside the anti-freezing shed and is used to collect the current wind direction information, and the converter 2 converts the current wind direction information into wind direction data recognized by the controller 4; the temperature collector 3 is arranged inside the anti-freezing shed and is used to collect the current temperature data; the controller 4 processes the current wind direction data and temperature data and sends a control instruction to the actuator 5, and the actuator 5 controls the opening of the rolling gate.

[0031] For the working principle and process of the present invention, please refer to the attached Figure 2 as shown:

[0032] First, set the detection period parameter of the controller 4, then the controller 4 issues an initialization command at intervals, that is, initialize the wind direction collector 1 and the temperature collector 3; second, the controller 4 drives the wind direction collector 1 to collect the wind direction. After the wind direction collector 1 completes initialization, the controller 4 sends a wind direction query frame, and then the controller 4 receives a wind direction return frame. Then the controller 4 performs a CRC check on the return frame. If the check is qualified, the wind direction information is extracted. If the check is unqualified, initialization is performed; third, the controller 4 determines the reference rolling gate through the wind direction, that is, the rolling gate on the windward side is used as the reference rolling gate; fourth, the controller 4 drives the temperature collector 3 to collect the temperature. After the temperature collector 3 completes initialization, the controller 4 sends a temperature query command, and then the controller 4 receives the temperature return data and extracts the return data value. Then the return data value is converted, and then the return temperature information is obtained. This return temperature information can be recognized and calculated by the controller 4; fifth, the controller 4 calculates the address of the rolling gate to be opened, that is, the sorting of all rolling gates based on the reference rolling gate; sixth, the controller 4 sends a command to open the rolling gate to open the rolling gates on both sides of the reference rolling gate; seventh, the controller 4 sends a command to close the remaining rolling gates to close the remaining rolling gates that do not need to be opened.

[0033] In the present invention, the wind direction collector 1 collects the current wind direction information, and the temperature collector 3 collects the current ambient temperature. The corresponding data is sent to the controller 4. The controller 4 calculates the number of rolling gates to be opened according to the temperature information, determines the reference rolling gate on the windward side based on the wind direction information, and calculates the addresses of the remaining rolling gates to be opened. Then, the controller 4 controls the actuator 5 to open and close the specified number of rolling gates at the specified orientation. Moreover, the higher the ambient temperature, the smaller the temperature difference of the water to be cooled, and thus more rolling gates need to be opened to enhance the cooling capacity. Among them, the rolling gates are opened according to the wind direction information, that is, the rolling gates on the leeward side are opened, namely the rolling gates on both sides of the reference rolling gate.

[0034] In the implementation of the present invention, the number of rolling gates opened is controlled according to the temperature information, that is, the ventilation area is controlled according to the temperature, so that the cooling capacity of the valve cooling system is relatively stable, various abnormal working conditions are avoided, and the stability of the valve cooling system is improved; the rolling gates on the leeward side are opened according to the wind direction information, that is, the rolling gates on both sides of the reference rolling gate. Moreover, all the rolling gates of the antifreeze shed are in different opening and closing states in each detection cycle. It neither requires manual opening of the rolling gates nor avoids the accumulation of garbage formed by a large amount of foreign objects floating into the antifreeze shed due to the failure to close the rolling gates in time, and also avoids many problems such as foreign objects blocking the air inlet of the fan. The present invention adopts automatic control to replace manual control, saving manpower and material resources. At the same time, this automatic control system adopts a compatibility improvement scheme, retaining all the functions of the original manual control method, ensuring that the effectiveness of this system is only higher than that of the original method.

[0035] As a specific embodiment of the above embodiment, wherein:

[0036] The controller 4 selects the 8051 single-chip microcomputer. There are many types of 8051 single-chip microcomputers on the market, which are widely used, easy to purchase and replace. And the 8051 single-chip microcomputer needs a customized shell; the voltage level of the third power line 10 is DC5V, which is adapted to the 8051 single-chip microcomputer.

[0037] The temperature collector 3 selects the DS18B20 temperature sensor. The DS18B20 temperature sensor has many packaging forms. The packaging form for outdoor installation conditions is selected, which is a three-pin chip type, adopting the I²C protocol, and has good installability and environmental adaptability; the third data line 11 selects the I²C bus.

[0038] The wind direction collector 1 selects a digital wind direction sensor with an RS485 transmission method, which is suitable for outdoor installation conditions; the first data line 7 selects an RS485 transmission line, and the RS485 transmission method has high anti-interference performance; the second data line 9 selects a TTL transmission line and is connected to the controller 4; the converter 2 selects an RS485 to TTL converter and is adapted to the 8051 single-chip microcomputer; the voltage levels of the first power line 6 and the second power line 8 are DC24V and are adapted to the digital wind direction sensor with an RS485 transmission method.

[0039] The actuator 5 selects an integrated low-voltage relay board, which has a compact structure and saves installation space; after the outlet of the low-voltage relay board, it is connected in parallel with the control relay control line for the opening and closing of the rolling gate; the fourth data line 12 selects a ribbon cable.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic control method for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station, characterized in that, It includes the following control steps: First, set the detection cycle parameter of the controller (4). Then, the controller (4) issues an initialization command at intervals, that is, initialize the wind direction collector (1) and the temperature collector (3). Second, the controller (4) drives the wind direction collector (1) to collect the wind direction. After the wind direction collector (1) completes initialization, the controller (4) sends a wind direction query frame. Then, the controller (4) receives the wind direction return frame. Then, the controller (4) performs CRC check on the return frame. If the check is qualified, the wind direction information is extracted. If the check is unqualified, initialization is performed. Third, the controller (4) determines the reference rolling gate according to the wind direction, that is, the rolling gate on the windward side is used as the reference rolling gate. Fourth, the controller (4) drives the temperature collector (3) to collect the temperature. After the temperature collector (3) completes initialization, the controller (4) sends a temperature query command. Then, the controller (4) receives the temperature return data and extracts the return data value. Then, the return data value is converted. Then, the return temperature information is obtained, and this return temperature information can be recognized and calculated by the controller (4). Fifth, the controller (4) calculates the address of the rolling gate to be opened, that is, the sorting of all rolling gates with the reference rolling gate as the standard. Sixth, the controller (4) sends a command to open the rolling gate to open the rolling gates on both sides of the reference rolling gate. Seventh, the controller (4) sends a command to close the remaining rolling gates to close the remaining rolling gates that do not need to be opened.

2. The automatic control method for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station according to claim 1, characterized in that, It is realized by the automatic control system of the rolling gate of the anti-freezing shed of the converter station valve cooling system. The automatic control system of the rolling gate of the anti-freezing shed of the converter station valve cooling system includes: a DC power supply, a wind direction collector (1), a converter (2), a temperature collector (3), a controller (4) and an actuator (5); the controller (4) is connected to the converter (2) through a second data line (9), the controller (4) is connected to the temperature collector (3) through a third data line (11), the controller (4) is connected to the actuator (5) through a fourth data line (12), and the controller (4) is connected to the DC power supply through a third power line (10); the converter (2) is connected to the DC power supply through a second power line (8) and is connected to the wind direction collector (1) through a first data line (7); the wind direction collector (1) is connected to the converter (2) through a first power line (6); the DC power supply provides various levels of DC electrical energy to provide electrical energy for the converter (2) and the controller (4) connected to it, and the converter (2) provides electrical energy for the wind direction collector (1); the actuator (5) is connected to the rolling gate of the anti-freezing shed and controls the opening of the rolling gate.

3. The automatic control method for the rolling gate of the anti-freezing shed of the converter station valve cooling system according to claim 2, characterized in that, The controller (4) selects an 8051 single-chip microcomputer; the voltage level of the third power line (10) is DC5V, which is adapted to the 8051 single-chip microcomputer.

4. The automatic control method of the rolling gate of the antifreeze shed for the valve cooling system of a converter station according to claim 2, wherein, The temperature collector (3) selects a DS18B20 temperature sensor; the third data line (11) selects an I²C bus.

5. The automatic control method for the rolling gate of the anti-freezing shed of the valve cooling system of a converter station according to claim 2, wherein, The wind direction collector (1) selects a digital wind direction sensor with an RS485 transmission mode; the first data line (7) selects an RS485 transmission line; the second data line (9) selects a TTL transmission line and is connected to the controller (4); the converter (2) selects an RS485 to TTL converter and is adapted to an 8051 single-chip microcomputer; the voltage levels of the first power line (6) and the second power line (8) are DC24V and are adapted to a digital wind direction sensor with an RS485 transmission mode.

6. The automatic control method for the rolling gate of the anti-freezing shed of the valve cooling system in a converter station according to claim 2, wherein, The actuator (5) selects an integrated low-voltage relay board; after the outlet of the low-voltage relay board, it is connected in parallel with the control relay control line for the opening and closing of the rolling gate; the fourth data line (12) selects a flat cable.

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