A fan control system suitable for small hydropower station outside area

Abstract

The utility model relates to the technical field of water conservancy project ventilation air conditioning, especially a fan control system suitable for the area outside the plant of small hydropower station, the area outside the plant includes the water inlet, spillway and water intake tower area, the fan control system includes the low voltage distribution cabinet of setting in the room, the ventilation air conditioning monitoring system workstation of setting in the central control room, network switch and the local control unit of setting in each area outside the plant, the utility model discloses the fan control cabinet or the ventilation air conditioning monitoring system of central control room of setting in the fan vicinity directly control or monitor the operation of fan, utilize the control loop of regional fan control module box integration fan, avoid the problem that control cable is too long and is vulnerable to interference, and the volume of regional fan control module box is small, can be wall-mounted installation, effectively solve the installation problem of the area outside the plant, the utility model has the characteristics such as centralized control, higher economy, smaller floor area, flexible installation position.

Description

Technical Field

[0001] This utility model relates to the field of ventilation and air conditioning technology in hydropower projects, and in particular to a fan control system suitable for the outdoor area of ​​a small hydropower station. Background Technology

[0002] In conventional ventilation and air conditioning systems for small and medium-sized hydropower stations, the power supply and control circuits for the fans in the external area are generally installed in low-voltage distribution cabinets. Therefore, the distribution and distance of the fans do not affect the centralized control of the ventilation and air conditioning monitoring system. However, according to the requirements of some regulations for small and medium-sized hydropower stations, the fans in the external area (intake, spillway, intake tower) need to be equipped with separate fan control cabinets. The fan control cabinets are close to the fans and installed locally. This installation requirement makes the control circuits of the fans far away from the low-voltage distribution cabinets. The installation positions of the fans are scattered and far apart from each other, with some fans even more than 1 kilometer apart. Due to the large voltage drop of the control cables at this distance and the susceptibility to electromagnetic interference along the cable path, the fans cannot be directly controlled through the control cables of the ventilation and air conditioning monitoring system. If ventilation and air conditioning monitoring systems are set up separately in each external area, it will greatly increase the equipment cost. Moreover, the monitoring system cabinets occupy a large area, and the space in the external area is very limited, making the layout and installation of the equipment difficult. Therefore, a fan control system suitable for the external area of ​​small hydropower stations is needed to meet the needs of users. Utility Model Content

[0003] The purpose of this utility model is to provide a fan control system suitable for the external area of ​​a small hydropower station, so as to solve the problems of high cost, large footprint and difficult installation of existing ventilation and air conditioning systems.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fan control system applicable to the external area of ​​a small hydropower station, the external area including the inlet, spillway and intake tower area, the fan control system including a low-voltage distribution cabinet installed indoors, a ventilation and air conditioning monitoring system workstation installed in the central control room, a network switch, and local control units installed in each external area, the ventilation and air conditioning monitoring system workstation being connected to the network switch via twisted pair cable, the network switch being connected to the regional fan control module box in each regional control unit via optical fiber cable, and the indoor low-voltage distribution cabinet being connected to the regional control units in each area via power cable.

[0005] As a preferred embodiment of the wind turbine control system applicable to the off-site area of ​​a small hydropower station, the local control unit includes a regional wind turbine control module box, wind turbines, and a wind turbine control cabinet corresponding to each wind turbine.

[0006] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the wind turbine control cabinet includes a power module, a wind turbine start-stop control circuit, a sensor interface, and a display panel.

[0007] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the power supply module's incoming line is led from the low-voltage distribution cabinet via a power cable, and the wind turbine start / stop control circuit is connected to the regional wind turbine control module box via a control cable.

[0008] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the sensor interface includes an analog input interface and an analog output interface. The analog input interface is connected to the wind turbine and the terminal sensor via a shielded twisted pair cable, and the analog output interface is connected to the regional wind turbine control module box via a shielded twisted pair cable.

[0009] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the display panel is equipped with buttons, knobs and indicator lights on its side wall.

[0010] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the regional wind turbine control module box includes a PLC device and a touch panel.

[0011] As a preferred embodiment of the wind turbine control system applicable to the external area of ​​a small hydropower station, the terminal sensors include a temperature sensor and a humidity sensor.

[0012] As a preferred embodiment of the present invention, a fan control system applicable to the external area of ​​a small hydropower station includes an exhaust fan and a blower.

[0013] This utility model provides a wind turbine control system applicable to the off-site area of ​​a small hydropower station, which has the following features:

[0014] Beneficial effects:

[0015] This invention firstly establishes a ventilation and air conditioning monitoring system workstation in the central control room of the plant, and sets up fan control cabinets near the exhaust and supply fans outside the plant. Regional fan control module boxes are set up in different areas outside the plant. Each regional fan control module box collects the fan's operating status through its respective fan control cabinet and executes start / stop commands. The ventilation and air conditioning monitoring system workstation in the central control room can collect data from each regional fan control module box via fiber optic communication and transmit control commands to the module boxes, thereby controlling the fans. This allows operators to directly control or monitor the fan operation through the fan control cabinets or the ventilation and air conditioning monitoring system in the central control room. The regional fan control module boxes are small in size and can be wall-mounted, effectively solving the installation limitations in areas outside the plant. This invention features centralized control, higher economic efficiency, smaller footprint, and flexible installation location. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the connection of the fan control system in an embodiment;

[0018] Figure 2 This is a schematic diagram of the fan control cabinet in the embodiment;

[0019] Figure 3 This is a schematic diagram of the regional fan control module box in the embodiment.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Low-voltage distribution cabinet; 1a. Twisted pair cable; 1b. Optical fiber cable; 1c. Power cable; 1d. Control cable; 1e. Shielded twisted pair cable; 2. Ventilation and air conditioning monitoring system workstation; 3. Local control unit; 4. Network switch; 5. Area fan control module box; 501. PLC device; 502. Touch panel; 6. Fan; 7. Fan control cabinet; 701. Power module; 702. Fan start / stop control circuit; 703. Sensor interface; 704. Display panel; 8. Terminal sensor; 801. Temperature sensor; 802. Humidity sensor. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example 1: Refer to Figures 1-3 This embodiment is a ventilation and air conditioning monitoring system applicable to the external area of ​​small and medium-sized hydropower stations. The external area of ​​the hydropower station includes multiple areas such as water inlet, spillway and water intake tower.

[0026] In this embodiment, the ventilation and air conditioning monitoring system includes an indoor low-voltage distribution cabinet 1, a ventilation and air conditioning monitoring system workstation 2 in the central control room, local control units 3 in the inlet area, local control units 3 in the spillway area, local control units 3 in the water intake tower area, and a network switch 4 located in the central control room. The ventilation and air conditioning monitoring system workstation 2 is connected to the network switch 4 via a twisted pair cable 1a. The network switch 4 is connected to the area fan control module box 5 in the local control units 3 of each area via an optical fiber cable 1b. The indoor low-voltage distribution cabinet 1 is connected to the local control units 3 of each area via a power cable 1c.

[0027] The local control unit is a crucial component of the automated monitoring system, responsible for monitoring and controlling the field equipment. The local area usually refers to the site where construction and other activities are carried out directly.

[0028] Each area's local control unit 3 includes one area wind turbine control module box 5, several wind turbines 6, and one wind turbine control cabinet 7 corresponding to each wind turbine 6.

[0029] like Figure 2As shown, the fan control cabinet 7 includes a power module 701, a fan start / stop control circuit 702, a sensor interface 703, and a display panel 704. The power input line of the power module 701 is drawn from the low-voltage distribution cabinet 1. The fan start / stop control circuit 702 is connected to the fan 6 through a control cable 1d. The analog input interface of the sensor interface 703 is connected to the fan 6 and the terminal sensor 8 through a shielded twisted pair cable 1e. The analog output interface of the sensor interface 703 is connected to the area fan control module box 5 through a shielded twisted pair cable 1e. The contactor and circuit breaker of the fan start / stop control circuit 702 are connected to the area fan control module box 5 through a control cable 1d. The fan control cabinet 7 sends the open / closed status of the internal circuit breaker and contactor, the operating status of the fan 6, and the temperature and humidity information collected by the terminal sensor 8 to the area fan control module box 5. At the same time, the fan control cabinet 7 receives the control commands issued by the area fan control module box 5.

[0030] The side wall of the display panel 704 is equipped with buttons, knobs and indicator lights. The buttons and knobs are for manual operation, and the indicator lights are for indicating the current working status.

[0031] like Figure 3 As shown, the area fan control module box 5 includes a PLC device 501 and a touch panel 502. The digital input interface of the PLC device 501 is connected to the fan control cabinet 7, and the digital output interface of the PLC device 501 is connected to the fan control cabinet 7. The analog input interface of the PLC device 501 is connected to the terminal sensor 8 via a shielded twisted pair cable 1e. The terminal sensor 8 includes a temperature sensor 801 and a humidity sensor 802. The fan 6 includes an exhaust fan and a supply fan. The area fan control module box 5 is located in the center of each area and is equidistant from each fan 6.

[0032] The specific working principle is as follows: the ventilation and air conditioning monitoring system workstation 2 communicates with the local control unit 3 through optical cable 1b to obtain all ventilation and air conditioning operation data. It obtains temperature and humidity data of different areas through terminal sensors 8 in each area. The data collected in each area is preprocessed by the area fan control module box 5. Then, the ventilation and air conditioning monitoring system workstation 2 processes the data collected in all areas and automatically controls the equipment according to the current environmental data and equipment status according to the preset program. The power plant operator can also manually input control commands on the ventilation and air conditioning monitoring system workstation 2 to remotely start and stop the ventilation and air conditioning equipment.

[0033] Each area's local control unit 3 can independently collect the operating data of all ventilation and air conditioning systems in its area, as well as the temperature and humidity signals from the sensors. The area fan control module box 5 within the area can process the collected data and perform automatic control according to the preset temperature and humidity range. It can also receive control commands sent by the ventilation and air conditioning monitoring system workstation 2, adapting to the characteristics of "unmanned" or "minimal" operation of hydropower stations.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine control system applicable to the external area of ​​a small hydropower station, the external area including the intake, spillway, and water intake tower area, characterized in that: The fan control system includes a low-voltage distribution cabinet (1) installed indoors, a ventilation and air conditioning monitoring system workstation (2) installed in the central control room, a network switch (4), and local control units (3) installed in various areas outside the plant. The ventilation and air conditioning monitoring system workstation (2) is connected to the network switch (4) via a twisted pair cable (1a). The network switch (4) is connected to the regional fan control module box (5) in the local control unit (3) of each area via an optical fiber cable (1b). The low-voltage distribution cabinet (1) installed indoors is connected to the local control unit (3) of each area via a power cable (1c).

2. The wind turbine control system applicable to the off-site area of ​​a small hydropower station as described in claim 1, characterized in that: The local control unit (3) includes a regional wind turbine control module box (5), a wind turbine (6), and a wind turbine control cabinet (7) corresponding to each wind turbine.

3. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 2, characterized in that: The fan control cabinet (7) includes a power module (701), a fan start / stop control circuit (702), a sensor interface (703), and a display panel (704).

4. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 3, characterized in that: The power supply module (701) is connected to the low-voltage distribution cabinet (1) via a power cable (1c), and the fan start / stop control circuit (702) is connected to the area fan control module box (5) via a control cable (1d).

5. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 3, characterized in that: The sensor interface (703) includes an analog input interface and an analog output interface. The analog input interface is connected to the fan (6) and the terminal sensor (8) via a shielded twisted pair cable (1e). The analog output interface is connected to the area fan control module box (5) via a shielded twisted pair cable (1e).

6. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 3, characterized in that: The sidewall of the display panel (704) is equipped with buttons, knobs and indicator lights.

7. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 1, characterized in that: The regional fan control module box (5) includes a PLC device (501) and a touch panel (502).

8. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 5, characterized in that: The terminal sensor (8) includes a temperature sensor (801) and a humidity sensor (802).

9. A wind turbine control system suitable for the off-site area of ​​a small hydropower station as described in claim 5, characterized in that: The fan (6) includes an exhaust fan and an exhaust fan.

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