Temperature and time control fan active control system for reactive equipment room of transformer substation

Abstract

The invention relates to a temperature and time control fan active control system for a reactive equipment room of a transformer substation, which comprises a temperature sensor, an air inlet quantity sensor, a timer, an air inlet quantity alarm, a remote interaction device, a central controller and a plurality of fans, and the central controller comprises a temperature and time control controller, an online controller, an air inlet quantity monitoring controller and a power supply. According to the invention, a local and on-line dual-control mode is adopted, so that remote manual control can be realized; the system can be remotely connected to an AVC system of a transformer substation, and automatically starts a corresponding fan along with the closing of a switch, thereby achieving an active control effect. The reactive room temperature of the transformer substation can be effectively managed and controlled, the operation and maintenance cost is further reduced, the automatic management and control level of a power grid is improved, and important support is provided for implementation of a strong intelligent power grid.

Description

Technical Field

[0001] The present invention belongs to the technical field of substation fan control, and in particular relates to a temperature-time controlled fan active control system for a reactive equipment room of a substation. Background Art

[0002] Currently, the market primarily uses two control strategies for substation reactive room fan control systems: temperature control and time control. Temperature control uses temperature as a criterion, starting or stopping the fan when the temperature reaches a certain level; time control uses time as a criterion, controlling the fan contactor when the timer expires. If the reactive room temperature under these control strategies is suboptimal, the fan will often experience issues such as sweeping and overheating.

[0003] Both of the above control strategies have their shortcomings: the temperature control strategy uses temperature as the only criterion, which may cause one set of fans to be constantly on while the other set starts occasionally. This method will reduce the service life of the main fan; although the time control strategy can rotate regularly, it relies on manual operation by personnel, which may cause the machine to start even when the indoor temperature and humidity are normal. In addition, only one set of fans can be turned on at a time, and the adjustment capacity is limited. In addition, the two control systems are passive adjustments, and the control action is only controlled when the temperature or time reaches the limit. Both have hysteresis. The schematic diagram and control strategy of the existing control system are shown in the figure below. Figure 1 、 2 shown. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a temperature-controlled fan active control system for the reactive equipment room of a substation, which can effectively control the fan through the fan control environment system, reduce human intervention, and increase the intelligence of the controller.

[0005] The present invention solves the technical problem by the following technical solutions: A temperature-time controlled fan active control system for a reactive equipment room in a transformer substation comprises a temperature sensor, an air intake volume sensor, a timer, an air intake volume alarm, a remote interactor, a central controller and a number of fans. The central controller comprises a temperature-time controlled controller, an online controller, an air intake volume monitoring controller and a power supply. The temperature sensor is responsible for detecting the temperature, the timer is responsible for countdown, the air intake volume sensor is responsible for detecting the air intake volume, the remote interactor is responsible for accessing the remote manual remote control and the automatic opening / closing function with AVC and can return the current status of the temperature and air intake volume. The central controller is responsible for receiving signals from each sensor and performing calculations to make decisions. The air intake volume alarm is responsible for receiving signals from the central controller and providing an alarm function when an alarm is required.

[0006] Moreover, the temperature time control controller controls the single-interval dual fans. After power-on, the timer starts counting down and reads the temperature sensor data. If the countdown is reached, the average fan operation time of fan 1 and fan 2 is swapped to extend the life of the fan; if the fan 1 start-up temperature is reached, fan 1 is turned on; if not, the temperature is continuously monitored; after turning on fan 1, it is continuously determined whether the fan 1 shutdown temperature is reached. If so, it is turned off. If above the temperature, it is determined whether it is greater than the fan 2 start-up temperature. If so, fan 2 is turned on. If not, it is determined whether the fan 2 shutdown temperature is reached. If so, fan 2 is turned off. If not, the current temperature is continuously monitored.

[0007] Moreover, the air intake volume monitoring controller reads the air intake volume sensor data after power-on to determine whether the air intake volume is below the limit. If so, it is considered that the ventilation network is blocked, and the air intake volume alarm is activated and the remote interactive device is connected to remotely alarm. After receiving the alarm, the personnel will clean the ventilation network in time.

[0008] Moreover, the online controller collects data from various local sensors and the switching status of several fans, and outputs the data that needs to be uploaded to the remote interactive device to realize the uploading function; at the same time, it reads the control instructions of the remote interactive device to directly control the opening and closing of the fan; the remote interactive device plays a function like Internet access and transmission of the Internet of Things, and is the data entrance and exit provided by the system to the external control. According to the entrance and exit, it can be manually remotely controlled, and can also follow the AVC automatic control, that is, when the switch is closed, the fan in the corresponding area of ​​the interval is automatically turned on, and the temperature can be actively controlled before the temperature of the reactive room rises, thereby reducing the high temperature time of the reactive room.

[0009] The positive effects that the present invention can produce are: 1. This invention is used for multi-bay and multi-fan control scenarios in substation reactive rooms. It adopts local and online dual control modes and can be remotely controlled manually. It can be remotely connected to the substation AVC system and automatically start the corresponding fan following the closing of the switch, achieving active control effect. 2. Local control adopts a dual control strategy of temperature and time, which controls the temperature from two dimensions, can effectively enhance the control effect, while reducing the fan start-up time and extending the fan life; at the same time, it is equipped with an air intake sensor, and a matching air intake monitoring controller and air intake alarm, which can monitor the fan air intake and alarm when the air intake is insufficient, so that personnel can promptly detect and deal with the dirt on the fan filter.

[0010] 3. The integrated control system can effectively control the temperature of the reactive power room of the substation, further reduce operation and maintenance costs, improve the level of automated control of the power grid, and provide important support for the realization of a strong smart grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a connection diagram of the temperature and time control active control system in the prior art; Figure 2 It is the logic diagram of the temperature and time control controller of the prior art; Figure 3 This is a connection diagram of the temperature and time control active control system of the present invention; Figure 4 This is the logic diagram of the temperature and time control controller of the present invention; Figure 5 This is the logic diagram of the air intake monitoring controller of the present invention; Figure 6 This is the logic diagram of the online controller of the present invention. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the scope of protection of the present invention cannot be limited thereto.

[0013] like Figures 3 to 6 As shown, a temperature-time controlled fan active control system for the reactive equipment room of a substation is innovative in that it includes a temperature sensor, an air intake volume sensor, a timer, an air intake volume alarm, a remote interactor, a central controller and several fans, and the central controller includes a temperature-time controlled controller, an online controller, an air intake volume monitoring controller and a power supply; the temperature sensor is responsible for detecting the temperature, the timer is responsible for countdown, the air intake volume sensor is responsible for detecting the air intake volume, the remote interactor is responsible for accessing the remote manual remote control and the automatic opening / closing function with AVC and can return the current status of the temperature and air intake volume, the central controller is responsible for receiving the signals of each sensor and performing calculations to make decisions, and the air intake volume alarm is responsible for receiving the signal of the central controller and providing an alarm function when an alarm is needed.

[0014] The temperature time control controller controls the single-interval dual fans. After power-on, the timer starts counting down and reads the temperature sensor data. If the countdown is reached, the average fan operation time of fan 1 and fan 2 is swapped to extend the life of the fan; if the fan 1 start-up temperature is reached, fan 1 is turned on; if not, the temperature is continuously monitored; after turning on fan 1, it is continuously determined whether the fan 1 shutdown temperature is reached. If so, it is turned off. If above the temperature, it is determined whether it is greater than the fan 2 start-up temperature. If so, fan 2 is turned on. If not, it is determined whether the fan 2 shutdown temperature is reached. If so, fan 2 is turned off. If not, the current temperature is continuously monitored.

[0015] The air intake volume monitoring controller reads the air intake volume sensor data after power-on to determine whether the air intake volume is below the limit. If so, it is considered that the ventilation network is blocked, and the air intake volume alarm is activated and the remote interactive device is connected to remotely alarm. After receiving the alarm, the personnel clean the ventilation network in time.

[0016] The online controller collects data from various local sensors and the switching status of several fans, and outputs the data that needs to be uploaded to the remote interactive device to realize the uploading function; at the same time, it reads the control instructions of the remote interactive device to directly control the opening and closing of the fan; the remote interactive device plays the role of Internet access and transmission of the Internet of Things. It is the data entrance and exit provided by the system to the external control. According to the entrance and exit, it can be manually remotely controlled or automatically controlled according to AVC. That is, when the switch is closed, the fan in the corresponding area of ​​the interval is automatically turned on. The temperature can be actively controlled before the temperature of the reactive room rises, reducing the high temperature time of the reactive room.

[0017] The present invention is used for multi-bay and multi-fan control scenarios in substation reactive rooms. It adopts local and online dual control modes and can be remotely controlled manually. It can be remotely connected to the substation AVC system and automatically start the corresponding fan following the closing of the switch, achieving active control effect. The local control adopts a dual control strategy of temperature and time, which manages the temperature from two dimensions, which can effectively enhance the control effect, while reducing the fan startup time and extending the fan life; at the same time, it is equipped with an air intake sensor, and a matching air intake monitoring controller and air intake alarm, which can monitor the fan air intake and alarm when the air intake is insufficient, so that personnel can promptly discover and deal with the dirt on the fan filter.

[0018] This integrated control system can effectively control the temperature of the reactive power room of the substation, further reduce operation and maintenance costs, improve the level of automated control of the power grid, and provide important support for the realization of a strong smart grid.

[0019] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A temperature-controlled and time-controlled fan active control system for a reactive equipment room in a substation, characterized by: It includes a temperature sensor, an air intake volume sensor, a timer, an air intake volume alarm, a remote interface, a central controller and several fans. The central controller includes a temperature and time control controller, an online controller, an air intake volume monitoring controller and a power supply. The temperature sensor is responsible for detecting the temperature, the timer is responsible for countdown, the air intake volume sensor is responsible for detecting the air intake volume, the remote interface is responsible for accessing the remote manual remote control and the automatic opening / closing function with AVC and can return the current status of the temperature and air intake volume. The central controller is responsible for receiving signals from each sensor and performing calculations to make decisions. The air intake volume alarm is responsible for receiving signals from the central controller and providing an alarm function when an alarm is needed.

2. The temperature-controlled and time-controlled fan active control system for the reactive equipment room of a substation according to claim 1 is characterized in that: The temperature time control controller controls the single-interval dual fans. After power-on, the timer starts counting down and reads the temperature sensor data. If the countdown is reached, the average fan operation time of fan 1 and fan 2 is swapped to extend the life of the fan; if the fan 1 start-up temperature is reached, fan 1 is turned on; if not, the temperature is continuously monitored; after turning on fan 1, it is continuously determined whether the fan 1 shutdown temperature is reached. If so, it is turned off. If above the temperature, it is determined whether it is greater than the fan 2 start-up temperature. If so, fan 2 is turned on. If not, it is determined whether the fan 2 shutdown temperature is reached. If so, fan 2 is turned off. If not, the current temperature is continuously monitored.

3. The temperature-controlled and time-controlled fan active control system for the reactive equipment room of a substation according to claim 1 is characterized in that: The air intake volume monitoring controller reads the air intake volume sensor data after power-on to determine whether the air intake volume is below the limit. If so, it is considered that the ventilation network is blocked, and the air intake volume alarm is activated and the remote interactive device is connected to remotely alarm. After receiving the alarm, the personnel clean the ventilation network in time.

4. The temperature-controlled and time-controlled fan active control system for the reactive equipment room of a substation according to claim 1 is characterized in that: The online controller collects data from various local sensors and the switching status of several fans, and outputs the data that needs to be uploaded to the remote interactive device to realize the uploading function; at the same time, it reads the control instructions of the remote interactive device to directly control the opening and closing of the fan; the remote interactive device plays the role of Internet access and transmission of the Internet of Things. It is the data entrance and exit provided by the system to the external control. According to the entrance and exit, it can be manually remotely controlled or automatically controlled according to AVC. That is, when the switch is closed, the fan in the corresponding area of ​​the interval is automatically turned on. The temperature can be actively controlled before the temperature of the reactive room rises, reducing the high temperature time of the reactive room.

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