CN106527320A - Detection and maintenance system and method for heater in generator set - Google Patents

Abstract

The invention discloses a detection and maintenance system and method for a heater in a generator set, which are used in the field of electric power systems and can solve the problem of emergency shutdown of the generator set due to false alarms, thereby reducing the utilization rate of the generator set. The detection and maintenance system includes: the switch module starts the heater by receiving the start command sent by the controller, and turns off the heater by receiving the shutdown command sent by the controller; the heating chamber contains liquid, and the heating chamber is provided with an inlet for liquid inflow and an inlet for liquid outflow. The outlet; the temperature detector is set to detect the temperature of the liquid in the heating chamber and send it to the controller; the controller is used to send a command to start the heater to the switch module, and calculate the temperature change parameters of the liquid within the preset time period based on the received temperature. , and determine the feedback status of the switch module, and determine whether the heater is faulty based on the determined feedback status and temperature change parameters.

Description

Inspection and maintenance system and method for heater in generator set

technical field

The invention relates to the field of power systems, in particular to a detection and maintenance system and method for heaters in generator sets.

Background technique

Wind turbines are usually installed in outdoor environments with relatively harsh environmental conditions, and some have temperatures lower than -20°C in winter. In order to ensure the normal operation of the internal equipment of the wind turbine, it is necessary to use a heater to control the temperature inside the unit. The converter part of the wind turbine adopts a water circulation system for temperature control, and the water-cooled heater is used to heat the water in the water circulation system, so that the water temperature in the water-cooling system is increased to heat the converter. The water in the water-cooling system is in the closed space of the water-cooling system, and there is no liquid exchange with the outside world, so that the water temperature in the water-cooling circulation system gradually increases with the work of the water-cooling heater. The specific process is that after the PLC (Programmable Logic Controller, Programmable Logic Controller) sends a start command, the switch in the switch module is closed, the heater is connected to the power supply and starts to work, and the PLC confirms by receiving the feedback signal after the switch in the switch module is closed The heater is connected to the power supply to start working. However, in the actual operation process, when the wiring in the switch module is loose, although the heater is connected to the power supply and starts to work, the PLC cannot receive the feedback signal from the switch module, and the PLC does not receive the feedback signal from the switch module. An alarm is generated for the failure of the heater, that is, the PLC generates a false alarm due to an abnormality of the switch module. At this time, regardless of whether the alarm is true or false, the generating set needs to be shut down in an emergency to protect the safe operation of the generating set, thereby seriously reducing the utilization rate of the generating set.

Contents of the invention

Embodiments of the present invention provide a detection and maintenance system and method for a water-cooled heater of a wind power generating set, which can solve the problem of reducing the utilization rate of the generating set due to false alarms.

In a first aspect, the present invention provides a detection and maintenance system for a heater in a generator set, including: a controller, a switch module and a temperature detector;

The switch module activates or deactivates the heater by receiving a switch command sent by the controller, wherein at least a part of the heater is immersed in the liquid in the heating chamber, and the heating chamber is provided with an inlet for liquid inflow and an outlet for liquid outflow;

a temperature detector arranged to detect the temperature of the liquid in the heating chamber and send it to the controller;

The controller is used to send a command to start the heater to the switch module, calculate the temperature change parameter of the liquid within a preset time period according to the received temperature, and determine the feedback state of the switch module, and based on the determined feedback state and temperature change The quantity determines whether the heater is faulty, wherein, the feedback state includes that the controller receives the turn-on feedback signal of the switch module or the controller does not receive the turn-on feedback signal of the switch module.

According to the first aspect of the present invention, the controller is further used for:

When the feedback state is that the controller receives the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is less than the preset value, it is determined that the heater is faulty;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater is normal;

When the feedback state is that the controller does not receive the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is less than the preset value, it is determined that the heater is faulty;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater is normal.

According to the above aspects of the present invention, the method also includes:

When the feedback state is that the controller receives the feedback signal, it is judged that the switch module is normal;

If the temperature change parameter is less than the preset value, it is determined that the switch module is normal;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module is normal;

When the feedback state is that the controller does not receive the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module is faulty.

According to the above aspect of the present invention, the temperature detector includes an outlet temperature detector arranged at the outlet and connected to the controller, wherein,

The outlet temperature detector is used to detect the temperature of the liquid at the outlet and send it to the controller.

According to the above aspect of the present invention, the outlet temperature detector is also used for:

When the controller issues a command to start the heater, the first temperature of the liquid at the outlet is measured and sent to the controller, and after waiting for a preset period of time, the second temperature of the liquid at the outlet is measured and sent to the controller.

According to the above aspects of the present invention, the controller is also used for:

Calculating a temperature change parameter of the liquid within a preset time period according to the received first temperature and the received second temperature.

According to the above aspect of the present invention, the temperature change parameter includes a temperature change rate, and the preset value includes a preset temperature change rate.

According to the above aspect of the present invention, the controller is also used for:

judging whether it is necessary to adjust the power of the heater according to the temperature change parameter, and the preset value and/or the temperature required by the generating set;

When the power of the heater needs to be adjusted, a power adjustment instruction is sent to the heater.

According to the above aspect of the present invention, the temperature detector also includes an inlet temperature detector arranged at the inlet and connected to the controller, the inlet and the outlet are connected through an external pipeline, so that the liquid circulates according to the direction from the inlet to the outlet, wherein,

an inlet temperature detector for measuring the third temperature of the liquid at the inlet and sending it to the controller;

The controller is also used to perform one or more of the following judgments:

When the second temperature is less than or equal to the third temperature, it is determined that the setting positions of the inlet temperature detector and the outlet temperature detector are opposite;

When the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal;

When the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline is faulty.

According to the above aspect of the present invention, the controller is also used for:

receiving the temperature of the liquid detected by the temperature detector;

It is determined to start or stop the heater according to the temperature of the liquid detected by the temperature detector and the temperature required by the generating set.

In the second aspect, the present invention provides a detection and maintenance method for the water-cooled heater of the wind power generating set, which is used in the detection and maintenance system of the first aspect, wherein the liquid flows from the inlet to the outlet, and the method includes:

The controller sends a command to start the heater to the switch module;

The temperature detector detects the temperature of the liquid and sends it to the controller;

The controller calculates the temperature change parameters of the liquid within a preset time period according to the received temperature;

The controller judges the feedback state of the switch module, and the feedback state includes that the controller receives the activation feedback signal of the switch module or the controller does not receive the activation feedback signal of the switch module;

The controller determines whether the heater is malfunctioning based on the determined feedback state and the temperature change parameter.

According to the second aspect of the present invention, the acquisition by the controller of the temperature change of the liquid within the preset time period includes:

The controller determining whether the heater is faulty based on the determined feedback state and temperature change parameters includes:

When the feedback state is that the controller receives the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is less than the preset value, it is determined that the heater is faulty;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater is normal;

When the feedback state is that the controller does not receive the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is less than the preset value, it is determined that the heater is faulty;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater is normal.

According to the above aspects of the present invention, the method also includes:

When the feedback state is that the controller receives the feedback signal, it is judged that the switch module is normal;

If the temperature change parameter is less than the preset value, it is determined that the switch module is normal;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module is normal;

When the feedback state is that the controller does not receive the feedback signal, it is judged whether the temperature change parameter is less than the preset value;

If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module is faulty.

According to the above aspect of the present invention, the temperature detector detects the temperature of the liquid and sends it to the controller including:

The outlet temperature detector detects the temperature of the liquid at the outlet and sends it to the controller.

According to the above aspect of the present invention, the outlet temperature detector detects the temperature of the liquid at the outlet and sends it to the controller including:

When the controller issues a command to start the heater, the outlet temperature detector measures the first temperature of the liquid at the outlet and sends it to the controller;

After waiting for a preset period of time, the outlet temperature detector measures the second temperature of the liquid at the outlet and sends it to the controller.

According to the above aspect of the present invention, the calculation by the controller of the temperature change parameters of the liquid within the preset time period according to the received temperature includes:

The controller calculates a temperature change parameter of the liquid within a preset time period according to the received first temperature and the received second temperature.

According to the above aspect of the present invention, the temperature change parameter includes a temperature change rate, and the preset value includes a preset temperature change rate.

According to the above aspects of the present invention, the method also includes:

The controller judges whether it is necessary to adjust the power of the heater according to the temperature change parameter, the preset value and/or the temperature required by the generating set, and when it is necessary to adjust the power of the heater , sending a power adjustment command to the heater.

According to the above aspects of the present invention, the method also includes:

After waiting for a preset period of time, the inlet temperature detector measures the third temperature of the liquid at the inlet and sends it to the controller;

The controller performs one or more of the following judgments:

When the second temperature is less than or equal to the third temperature, it is determined that the setting positions of the inlet temperature detector and the outlet temperature detector are opposite;

When the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal;

When the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline is faulty.

According to the above aspects of the present invention, the method also includes:

The controller receives the temperature of the liquid detected by the temperature detector, and determines whether to start or turn off the heater according to the temperature of the liquid detected by the temperature detector and the temperature required by the generating set.

The embodiment of the present invention provides a detection and maintenance method and system for a heater in a generator set. In the present invention, at least a part of the heater in the detection and maintenance system is immersed in a heating chamber containing liquid, and the heating chamber is provided with an inlet and an outlet to allow the liquid to flow into the heating chamber. and out of the heating chamber, so that when the heater works, the temperature of the liquid in the heating chamber changes through heat transfer with the heater, and the temperature of the liquid is detected by the temperature detector and sent to the controller. After sending the command to start the heater, calculate the temperature change parameter of the liquid within the preset time period according to the temperature detected by the temperature detector, and judge whether the heater is faulty or not by the feedback state of the switch module and the temperature change parameter of the liquid. In this way, the controller performs multi-level heater detection and maintenance by combining the feedback status of the switch module and the temperature change parameters of the liquid to ensure the accuracy of heater detection and maintenance, avoid false alarms from the controller, and reduce emergency shutdowns of generator sets Gradually check the cause of the failure, so as to improve the utilization rate of the generator set.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic structural diagram of a detection and maintenance system for a heater in a generator set according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a detection and maintenance system for a heater in a generator set according to another embodiment of the present invention;

Fig. 3 is a schematic flowchart of a detection and maintenance method for a heater in a generator set according to an embodiment of the present invention.

Among them: 101-controller; 102-switch module; 103-outlet temperature detector; 104-inlet temperature detector; 201-heater; 202-heating chamber; 203-inlet; 204-exit.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

The detection and maintenance system and method for the heater in the generator set in the embodiments of the present invention are used to detect and maintain the heater in the generator set, and specifically can be used to detect and maintain the water-cooled heater in the wind power generator set.

Fig. 1 shows a schematic structural diagram of a detection and maintenance system for a heater 201 in a generator set according to an embodiment of the present invention. The inspection and maintenance system is used for inspection and maintenance of the heater 201 in FIG. 1, at least a part of the heater 201 is immersed in the liquid in the heating chamber 202, and the heating chamber 202 is provided with an inlet 203 for liquid inflow and an outlet for liquid outflow. Exit 204. The detection and maintenance system includes a controller 101, a switch module 102 and a temperature detector. The switch module 102 activates or closes the heater 201 by receiving instructions sent by the controller 101. The heating chamber 202 contains liquid, and the heating chamber 202 is provided with a device for the liquid to flow into. The inlet 203 and the outlet 204 for the liquid to flow out, the temperature detector is connected with the controller 101 , and is set to detect the temperature of the liquid in the heating chamber 202 and send it to the controller 101 .

Wherein, the controller 101 controls the start and stop of the heater 201 through the switch module 102 , the switch module 102 starts the heater 201 by receiving the start instruction sent by the controller 101 , and turns off the heater 201 by receiving the turn off instruction sent by the controller 101 . The controller 101 is configured to send a command to start the heater 201 to the switch module 102, calculate the temperature change parameter of the liquid within a preset time period according to the received temperature, and judge the feedback state of the switch module 102, and based on the determined feedback The state and temperature change parameters determine whether the heater 201 is malfunctioning. The feedback status includes that the controller 101 receives the turn-on feedback signal of the switch module 102 or the controller 101 does not receive the turn-on feedback signal of the switch module 102 .

It should be noted that when the heater 201 is working, the heat it heats can be transferred to the liquid, so that the temperature of the liquid changes. In the embodiment of the invention, there is no limitation on how to transfer heat between the heater 201 and the liquid, and various methods can be used, for example, immersing at least a part of the heater 201 in the liquid. In the embodiment of the present invention, the manner in which at least a part of the heater 201 is immersed in the liquid to realize heat transfer between the heater 201 and the liquid is described as an example.

Specifically, the controller 101 sends a starting command to the switch module 102, and the switch in the switch module 102 is closed, so that the heater 201 is powered on and starts to work. After the switch in the switch module 102 is closed, it forms a loop with the controller 101, and the controller 101 The opening feedback signal of the switch module 102 is received through this loop, that is, the controller 101 receives the opening feedback signal of the switch module 102, which means that the heater 201 is connected to the power supply, and the controller 101 does not receive the opening feedback signal of the switch module 102. Then it shows that the heater 201 may not be connected to the power supply; the heater 201 is powered on and starts to work, the liquid in the control chamber 103 enters through the inlet 203, and then flows out through the outlet 204, and heats up with the heater 201 during the flow of the liquid. transfer. If the heater 201 works normally, the temperature of the liquid in the heating chamber 202 will change after heat transfer with the heater 201 ; if the heater 201 fails, the temperature of the liquid in the heating chamber 202 will not change. To sum up, the controller 101 calculates the temperature change parameters of the liquid within a preset period of time according to the temperature sent by the temperature detector, and determines whether the heater 201 is faulty or not by receiving the feedback signal from the switch module 102 .

In the detection and maintenance system of the embodiment of the present invention, the controller 101 performs multi-level heater 201 detection and maintenance by combining the feedback state of the switch module 102 and the temperature change parameter of the liquid, so as to ensure the accuracy of the detection and maintenance of the heater 201 and avoid control The device 101 generates a false alarm, thereby reducing the emergency shutdown of the generating set and gradually checking the cause of the failure, thereby improving the utilization rate of the generating set.

At the same time, in the prior art, after the controller 101 sends a start command, the switch in the control module 102 is closed, and the heater 201 is powered on. After the switch in the switch module 102 is closed, it forms a loop with the controller 101, and the controller 101 passes The loop receives the feedback information of the opening of the switch module 102, and the controller 101 considers that the heater 201 has started to work. But at this time, the heater 201 may have been damaged. Since the heater 201 is usually a resistance heater 201, although the heater 201 is connected to the power supply, it cannot be heated normally due to its failure, and the controller 101 has received the opening of the switch module 102. After the feedback information, it is considered that the heater 201 is working normally, and it does not know that the heater 201 has broken down, so it will not send an alarm. At this time, the generator set also thinks that the heater 201 is working, but because the heater 201 is faulty, there is no heating. Then the internal converter and other equipment of the generator set cannot reach the required temperature, which seriously affects the normal operation of the generator set. In the detection and maintenance system of the embodiment of the present invention, the multi-level heater 201 detection and maintenance can be performed by combining the feedback state of the switch module 102 and the temperature change parameter of the liquid, so that the failure of the heater 201 can be found in time, and the controller 101 can avoid the failure to detect the heating. In order to avoid the situation that the converter 201 is faulty and no alarm is issued, and then avoid the situation that the internal converter of the generator set cannot reach the required temperature and affect the normal operation of the generator set, ensure the normal operation of the generator set, and improve the utilization rate of the generator set .

It can be understood that, the specific manner for the controller 101 shown in FIG. 1 to detect the failure of the heater 201 may be as follows.

The controller 101 can also be used to: when the feedback state is that the controller 101 receives the feedback signal of opening, judge whether the temperature change parameter is less than the preset value; if the temperature change parameter is less than the preset value, then determine that the heater 201 is faulty; if the temperature If the change parameter is greater than or equal to the preset value, it is determined that the heater 201 is normal; and when the feedback state is that the controller 101 has not received the feedback signal for opening, it is judged whether the temperature change parameter is less than the preset value; if the temperature change parameter is less than the preset value , it is determined that the heater 201 is faulty; if the temperature change parameter is greater than or equal to the preset value, it is determined that the heater 201 is normal.

Wherein, the preset value is a preset minimum value of a temperature change parameter that changes the temperature of the liquid within a preset time period when the heater 201 is working normally. When the feedback state is that the controller 101 receives the feedback signal, it indicates that the controller 101 has received the feedback signal from the switch module 102, that is, the heater 201 is connected to the power supply. At this time, if the temperature change parameter is greater than or equal to the preset value, then It indicates that the heater 201 is working normally; if the temperature change parameter is less than the preset value, it indicates that the heater 201 is malfunctioning. When the feedback state is that the controller 101 has not received the feedback signal, it indicates that the controller 101 has not received the feedback signal for opening the switch module 102, and the reason why the controller 101 has not received the feedback signal for opening the switch module 102 may be that the switch module 102 is faulty , it may also be that the heater 201 is faulty, so if the temperature change parameter is greater than or equal to the preset value, then the heater 201 is working normally; if the temperature change parameter is less than the preset value, then the heater 201 is faulty.

In the detection and maintenance system of the embodiment of the present invention, the controller 101 detects and maintains the heater 201 sequentially through the feedback state of the switch module 102 and the temperature change parameters of the liquid, so as to ensure the accuracy of the detection and maintenance of the heater 201 .

It can be understood that the controller 101 shown in FIG. 1 can also detect whether the switch module 102 fails by combining the feedback state of the switch module 102 and the temperature change parameter of the liquid. The specific method is: when the feedback state is that the controller 101 receives the opening feedback signal, it is determined that the switch module 102 is normal; when the feedback state is that the controller 101 does not receive the opening feedback signal, it is determined whether the temperature change parameter is less than the preset value; if If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module 102 is faulty.

Wherein, when the feedback state is that the controller 101 receives the activation feedback signal, it indicates that the controller 101 has received the activation feedback signal of the switch module 102, that is, the switch module 102 is normal. When the feedback state is that the controller 101 has not received the feedback signal for opening, it indicates that the controller 101 has not received the feedback signal for opening the switch module 102, and the reason why the controller 101 has not received the feedback signal for opening the switch module 102 may be that the switch module 102 The failure may also be the failure of the heater 201, so judge whether the temperature change parameter is less than the preset value at this time. If the temperature change parameter is greater than or equal to the preset value, it indicates that the heater 201 is normal at this time, and then determine that the switch module 102 is faulty.

In the detection and maintenance system of the embodiment of the present invention, the controller 101 can also perform detection and maintenance on the switch module 102 by combining the feedback state of the switch module 102 with the temperature change parameter of the liquid, so as to avoid false alarms from the controller 101 due to the failure of the switch module 102 , and then reduce the emergency shutdown of the generator set, thereby improving the utilization rate of the generator set, and through the above-mentioned step-by-step calculation, the real cause of the fault can be found, and the difficulty and time of maintenance staff can be reduced.

It can be understood that the temperature detector can be installed at any position capable of detecting the temperature of the liquid, but since the liquid flows in through the inlet 203, and then flows out through the outlet 204 after heat transfer occurs in the heating chamber 202, in order to ensure the accuracy of temperature detection, A temperature detector may be located within the heating chamber 202 or near the outlet 204 . But the liquid is usually sealed in the heating chamber 202 , if a temperature detector is installed in the heating chamber 202 , it will affect the sealing effect of the heating chamber 202 . Therefore, the temperature detector includes an outlet temperature detector 103 disposed at the outlet 204 and connected to the controller 101 . The outlet temperature detector 103 is used to detect the temperature of the liquid at the outlet 204 and send it to the controller 101 .

Specifically, the outlet temperature detector 103 is also used for: when the controller 101 issues a command to start the heater 201, measure the first temperature of the liquid at the outlet 204 and send it to the controller 101, and after waiting for a preset period of time , measure the second temperature of the liquid at the outlet 204 and send it to the controller 101 .

Through the detection of the temperature of the liquid by the process outlet temperature detector 103 , the controller 101 can calculate the temperature change of the liquid due to the heater 201 . That is, the controller 101 is further configured to: calculate the temperature change parameter of the liquid within a preset time period according to the received first temperature and the received second temperature.

It should be noted that the temperature change parameter may include a temperature change amount and a temperature change rate, and when the temperature change parameter is a temperature change amount, the preset value is the temperature of the liquid within a preset period of time when the heater 201 is working normally. The minimum value of the changed temperature change; when the temperature change parameter is the temperature change rate, the preset value is the preset temperature change rate, that is, the preset heater 201 is working normally to make the liquid temperature change within the preset time period Minimum temperature change rate. The controller 101 can calculate the temperature change amount based on the difference between the first temperature and the second temperature, and can also obtain the temperature change rate during the preset period of time from the difference between the first temperature and the second temperature.

It can be understood that the controller 101 can also judge whether it is necessary to adjust the power of the heater 201 according to the temperature change parameter, the preset value and/or the temperature required by the generator set; when the power of the heater 201 needs to be adjusted, A power adjustment command is sent to the heater 201 .

Wherein, the heater 201 can also be a heater whose power can be adjusted, so the controller 101 can judge whether the power of the heater 201 needs to be adjusted according to the calculated temperature change parameter, as well as the preset value and/or the temperature required by the generator set.

Specifically, when the temperature change parameter is greater than a preset value, it can be determined that the heater is normal, and at this time the controller 101 can adjust the power of the heater 201 . For example, the controller 101 increases the power of the heater 201 so that the heater 201 accelerates the rate of heat generation, thereby increasing the rate of temperature rise of the liquid. In addition, the heater 201 can also determine whether to adjust the power of the heater 201 according to the calculated temperature change rate and the temperature required by the generator set. For example, the controller 101 can determine the temperature difference according to the current temperature of the liquid and the temperature required by the generator set. If the temperature difference is large, the controller 101 can increase the power of the heater 201 to make the heater 201 accelerate the rate of heat generation , and then speed up the rate of liquid temperature rise; if the temperature difference is small, the controller 101 can reduce the power of the heater 201, so that the heater 201 reduces the rate of heat generation, so that the temperature of the liquid rises slowly, avoiding the power of the heater 201 If it is too large, the temperature of the liquid will rise rapidly, and then the temperature in the generator set will be too high, which will affect the generator set.

It should be noted that, in the embodiment of the present invention, the controller 101 can adjust the power of the heater 201 according to the operating condition of the generator set and the current state of the heater in the actual application scenario, and the adjustment method is not limited to the above-described method. When the power of the heater 201 needs to be adjusted, the controller 101 can send a power adjustment instruction to the heater 201 through the switch module 102 , or send a power adjustment instruction to the heater 201 through other components or directly.

Fig. 2 shows a schematic structural diagram of a detection and maintenance system for a heater 201 in a generator set according to yet another embodiment of the present invention. As for the detection and maintenance system shown in Figure 2, on the basis of the detection and maintenance system shown in Figure 1, an inlet temperature detector 104 connected to the controller 101 is provided at the inlet 203, and the inlet 203 and the outlet 204 are connected through an external pipeline, The liquid is circulated in the direction from the inlet 203 to the outlet 204 .

Wherein, the inlet temperature detector 104 that is connected with the controller 101 is set at the inlet 203, so that the controller 101 can detect the temperature of the liquid at the inlet 203 through the inlet temperature detector 104, and by comparing the temperature detected by the inlet temperature detector 104 with the temperature of the outlet By comparing the temperatures detected by the temperature detector 103, it can be determined whether the heater 201 is working and whether the maintenance system is normal. In addition, the generator set can connect the inlet 203 and the outlet 204 through an external pipeline, so that the liquid circulates in the external pipeline from the inlet 203 to the outlet 204 . At this time, the temperature detected by the inlet temperature detector 104 of the controller 101 is compared with the temperature detected by the outlet temperature detector 103, not only can it be determined whether the heater 201 is working, but also whether there is an abnormality in the external pipeline, and the fault can be found in time and repaired. processing to improve the utilization rate of generator sets.

Specifically, when the controller 101 issues a command to start the heater 201 , the outlet temperature detector 103 measures the first temperature of the liquid at the outlet 204 and sends it to the controller 101 . And after waiting for a preset period of time, the outlet temperature detector 103 measures the second temperature of the liquid at the outlet 204 and sends it to the controller 101, and the inlet temperature detector 104 measures the third temperature of the liquid at the inlet 203 and sends it to the controller device 101. The controller 101 is also used to perform one or more of the following judgments: when the second temperature is less than or equal to the third temperature, it is determined that the setting positions of the inlet temperature detector 104 and the outlet temperature detector 103 are opposite; when the second temperature When it is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal; when the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline is faulty.

It can be understood that, in the above embodiment, the controller 101 is also used to: receive the temperature of the liquid detected by the temperature detector; determine whether to start or turn off the heater according to the temperature of the liquid detected by the temperature detector and the temperature required by the generator set 201.

Among them, the controller 101 can determine the temperature of the liquid in real time by receiving the temperature of the liquid detected by the temperature detector, and then compare the temperature of the liquid with the temperature required by the generator set to determine whether the temperature of the liquid meets the requirements for the normal operation of the generator set. required temperature, and then determine whether to start or close the heater 201. For example, if the temperature of the liquid is lower than the temperature required by the generator set when the heater 201 is not started, it can be determined to start the heater 201, and a command to start the heater 201 is sent to the switch module 102; If the temperature is higher than the temperature required by the generator set, it means that the liquid has reached the temperature required by the generator set, and the heater 201 does not need to continue heating, then it can be determined to turn off the heater 201, and send a command to turn off the heater 201 to the switch module 102.

Through the above-mentioned process controller 101, the heater 201 can be started or closed in real time according to the temperature of the liquid, which avoids the situation that the temperature of the liquid drops and the heater 201 cannot be started in time to affect the normal operation of the generator set. The temperature and the heater cannot be turned off in time, resulting in a waste of resources.

Fig. 3 shows a schematic flowchart of a detection and maintenance method for the heater 201 in the generator set according to an embodiment of the present invention. The method shown in FIG. 3 can be used in the inspection and maintenance system shown in FIG. 1 or FIG. 2 . In the detection and maintenance system, the liquid in the heating chamber 202 flows from the inlet 203 to the outlet 204, as shown in Figure 3, the method includes: step 301, the controller 101 sends a command to start the heater 201 to the switch module 102; The temperature detector detects the temperature of the liquid and sends it to the controller 101; step 303, the controller 101 calculates the temperature change parameter of the liquid within a preset time period according to the received temperature; step 304, the controller 101 judges the feedback state of the switch module 102 , the feedback state includes that the controller 101 receives the opening feedback signal of the switch module 102 or the controller 101 does not receive the opening feedback signal of the switch module 102; step 305, the controller 101 judges the heater based on the determined feedback state and temperature change parameters 201 Is there a fault.

Specifically, step 305 can be specifically executed as follows: step 3051, when the feedback state is that the controller 101 receives a feedback signal, determine whether the temperature change parameter is less than a preset value; step 3052, if the temperature change parameter is less than a preset value, then determine Heater 201 failure; step 3053, if the temperature change parameter is greater than or equal to the preset value, then determine that the heater 201 is normal; step 3054, when the feedback state is that the controller 101 does not receive a feedback signal, determine whether the temperature change parameter is less than the preset value Set value; step 3055, if the temperature change parameter is less than the preset value, then determine that the heater 201 is faulty; step 3056, if the temperature change parameter is greater than or equal to the preset value, then determine that the heater 201 is normal.

It should be noted that, for the data processing principles of steps 301 to 305, reference may be made to the description in the embodiment shown in FIG. 1 , which will not be repeated here.

As an optional embodiment, the detection and maintenance method for the heater 201 in the generator set may also include: step 306, when the feedback state is that the controller 101 receives a feedback signal, it is determined that the switch module 102 is normal; step 307, when the feedback state is When the controller 101 does not receive the feedback signal, it is determined whether the temperature change parameter is less than the preset value; step 308, if the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module 102 is faulty.

It should be noted that, for the data processing principles of steps 306-308, reference may be made to the description in the embodiment shown in FIG. 1 , which will not be repeated here.

It can be understood that step 302 may be executed as: the outlet temperature detector 103 detects the temperature of the liquid at the outlet 204 and sends it to the controller 101 .

Specifically, when the controller 101 issued a command to start the heater 201, the outlet temperature detector 103 measured the first temperature of the liquid at the outlet 204 and sent it to the controller 101; after waiting for a preset period of time, the outlet temperature detector 103 measures the second temperature of the liquid at outlet 204 and sends it to controller 101 .

Further, step 303 may be performed as follows: the controller 101 calculates a temperature change parameter of the liquid within a preset time period according to the received first temperature and the received second temperature.

It should be noted that the temperature change parameter includes a temperature change rate, and the preset value includes a preset temperature change rate. For the data processing principles of the foregoing steps 302 and 303, reference may be made to the description in the embodiment shown in FIG. 1 , and details are not repeated here.

It can be understood that the detection and maintenance method of the heater 201 in the generator set in the embodiment of the present invention also includes: the controller 101 judges whether the heater needs to be adjusted according to the temperature change parameter, the preset value and/or the temperature required by the generator set 201, and when it is necessary to adjust the power of the heater 201, send a power adjustment command to the heater 201. For the data processing principles of the above steps, reference may be made to the description in the embodiment shown in FIG. 1 , and details are not repeated here.

After the outlet temperature detector 103 detects the first temperature and the second temperature in step 302 and sends them to the controller 101, the method further includes: step 309, after waiting for a preset period of time, the inlet temperature detector 104 measures the temperature of the inlet 203 The third temperature of the liquid at the place and sent to the controller 101; step 310, the controller 101 performs one or more of the following judgments: when the second temperature is less than or equal to the third temperature, it is determined that the inlet temperature detector 104 and The setting position of the outlet temperature detector 103 is opposite; when the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal; when the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline Fault.

Wherein, the liquid circulates according to the direction from the inlet 203 to the outlet 204, then the temperature of the liquid at the inlet 203 will also change, but if the heater 201 works normally, the temperature of the liquid at the outlet 204 should increase and be greater than the temperature at the inlet 203. The temperature, that is, the second temperature is greater than the third temperature and the first temperature. Therefore, if the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal; 203 and outlet 204 are reversely connected to the external pipeline, causing the liquid to flow into the heating chamber 201 from the outlet 204, and flow out of the heating chamber 202 from the inlet 203, or it is possible that the setting positions of the inlet temperature detector 104 and the outlet temperature detector 103 are reversed, so that the inlet What the temperature detector 104 detects is the temperature of the liquid at the outlet 204, and what the outlet temperature detector 103 detects is the temperature of the liquid at the inlet 203; if the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external Piping failure.

It can be understood that the detection and maintenance method of the heater 201 in the generator set in the embodiment of the present invention further includes: the controller 101 receives the temperature of the liquid detected by the temperature detector, and according to the temperature of the liquid detected by the temperature detector and the temperature of the generator set The desired temperature is determined to activate or deactivate the heater 201.

Among them, the controller 101 can determine the temperature of the liquid in real time by receiving the temperature of the liquid detected by the temperature detector, and then compare the temperature of the liquid with the temperature required by the generator set to determine whether the temperature of the liquid meets the requirements for the normal operation of the generator set. required temperature, and then determine whether to start or close the heater 201. For example, if the temperature of the liquid is lower than the temperature required by the generator set when the heater 201 is not started, it can be determined to start the heater 201, and a command to start the heater 201 is sent to the switch module 102; If the temperature is higher than the temperature required by the generator set, it means that the liquid has reached the temperature required by the generator set, and the heater 201 does not need to continue heating, then it can be determined to turn off the heater 201, and send a command to turn off the heater 201 to the switch module 102.

Through the above-mentioned process controller 101, the heater 201 can be started or closed in real time according to the temperature of the liquid, which avoids the situation that the temperature of the liquid drops and the heater 201 cannot be started in time to affect the normal operation of the generator set. The temperature and the heater cannot be turned off in time, resulting in a waste of resources.

It should be noted that, in the above embodiment, when the water-cooled heater in the wind power generating set is inspected and maintained, the liquid in the heating chamber 202 may be water or cooling liquid, etc., and the controller may be a PLC controller.

In the embodiments of the present invention, unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be A mechanical connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. A detection and maintenance system for a heater in a generating set, characterized in that, the detection and maintenance system includes: a controller (101), a switch module (102) and a temperature detector; The switch module (102) activates or deactivates the heater (201) by receiving instructions sent by the controller (101), wherein the heating chamber (202) is provided with an inlet (203) for liquid inflow and Outlet (204) for liquid outflow; The temperature detector is configured to detect the temperature of the liquid in the heating chamber (202) and send it to the controller (101); The controller (101), configured to send a command to start the heater (201) to the switch module (102), calculate a temperature change parameter of the liquid within a preset time period according to the received temperature, and judging a feedback state of the switch module (102), and judging whether the heater (201) is faulty based on the determined feedback state and the temperature change parameter, wherein the feedback state includes the controller (101) The activation feedback signal of the switch module (102) is received or the controller (101) does not receive the activation feedback signal of the switch module (102). 2. The inspection and maintenance system according to claim 1, characterized in that the controller (101) is also used for: When the feedback state is that the controller (101) receives the activation feedback signal, it is judged whether the temperature change parameter is less than a preset value; If the temperature change parameter is less than the preset value, it is determined that the heater (201) is faulty; If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater (201) is normal; When the feedback state is that the controller (101) has not received the activation feedback signal, judging whether the temperature change parameter is smaller than the preset value; If the temperature change parameter is less than the preset value, it is determined that the heater (201) is faulty; If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater (201) is normal. 3. The inspection and maintenance system according to claim 1 or 2, characterized in that the controller (101) is also used for: When the feedback state is that the controller (101) receives the activation feedback signal, it is determined that the switch module (102) is normal; When the feedback state is that the controller (101) has not received the activation feedback signal, judging whether the temperature change parameter is smaller than the preset value; If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module (102) is faulty. 4. The detection and maintenance system according to any one of claims 1-3, characterized in that, the temperature detector includes an outlet temperature sensor arranged at the outlet (204) and connected to the controller (101) detector (103), wherein, The outlet temperature detector (103) is used to detect the temperature of the liquid at the outlet (204) and send it to the controller (101). 5. The detection and maintenance system according to claim 4, characterized in that, the outlet temperature detector (103) is also used for: When the controller (101) issues the command to start the heater (201), measure the first temperature of the liquid at the outlet (204) and send it to the controller (101), and After waiting for the preset time period, the second temperature of the liquid at the outlet (204) is measured and sent to the controller (101). 6. The inspection and maintenance system according to claim 5, characterized in that, the controller (101) is also used for: calculating a temperature change parameter of the liquid within the preset time period according to the received first temperature and the received second temperature. 7. The inspection and maintenance system according to any one of claims 1, 2, 3 or 6, wherein the temperature change parameter includes a temperature change rate, and the preset value includes a preset temperature change rate. 8. The inspection and maintenance system according to claim 2, characterized in that the controller (101) is also used for: judging whether it is necessary to adjust the power of the heater (201) according to the temperature change parameter, and the preset value and/or the temperature required by the generating set; When it is determined that the power of the heater (201) needs to be adjusted, a power adjustment instruction is sent to the heater (201). 9. The inspection and maintenance system according to claim 5, characterized in that, the temperature detector further comprises an inlet temperature detector (104) arranged at the inlet (203) and connected to the controller (101) ), the inlet (203) and the outlet (204) are connected by an external pipeline, so that the liquid circulates according to the direction from the inlet (203) to the outlet (204), wherein, The inlet temperature detector (104) is used to measure a third temperature of the liquid at the inlet (203) and send it to the controller (101); The controller (101) is also configured to perform one or more of the following judgments: When the second temperature is less than or equal to the third temperature, it is determined that the setting positions of the inlet temperature detector (104) and the outlet temperature detector (103) are opposite; When the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal; When the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline is faulty. 10. The inspection and maintenance system according to claim 1, characterized in that the controller (101) is also used for: receiving the temperature of the liquid detected by the temperature detector; It is determined to start or stop the heater (201) according to the temperature of the liquid detected by the temperature detector and the temperature required by the generator set. 11. A detection and maintenance method for a heater in a generator set, characterized in that it is used in the detection and maintenance system according to any one of claims 1 to 8, wherein the liquid flows from the inlet (203) to the outlet (204) flows, the method comprising: The controller (101) sends a command to start the heater (201) to the switch module (102); The temperature detector detects the temperature of the liquid and sends it to the controller (101); The controller (101) calculates a temperature change parameter of the liquid within a preset time period according to the received temperature; The controller (101) judges the feedback status of the switch module (102), and the feedback status includes that the controller (101) receives the activation feedback signal of the switch module (102) or the controller ( 101) The activation feedback signal of the switch module (102) is not received; The controller (101) determines whether the heater (201) is faulty based on the determined feedback state and the temperature change parameter. 12. The detection and maintenance method according to claim 11, characterized in that, the controller (101) determining whether the heater (201) is faulty based on the determined feedback state and the temperature change parameter comprises: When the feedback state is that the controller (101) receives the feedback signal, it is judged whether the temperature change parameter is less than a preset value; If the temperature change parameter is less than the preset value, it is determined that the heater (201) is faulty; If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater (201) is normal; When the feedback state is that the controller (101) has not received the feedback signal, judging whether the temperature change parameter is smaller than the preset value; If the temperature change parameter is less than the preset value, it is determined that the heater (201) is faulty; If the temperature change parameter is greater than or equal to the preset value, it is determined that the heater (201) is normal. 13. The detection and maintenance method according to claim 11 or 12, characterized in that the method further comprises: When the feedback state is that the controller (101) receives the feedback signal, it is determined that the switch module (102) is normal; When the feedback state is that the controller (101) has not received the feedback signal, judging whether the temperature change parameter is smaller than the preset value; If the temperature change parameter is greater than or equal to the preset value, it is determined that the switch module (102) is faulty. 14. The detection and maintenance method according to any one of claims 11-13, characterized in that, the temperature detector detecting the temperature of the liquid and sending it to the controller (101) comprises: The outlet temperature detector (103) detects the temperature of the liquid at the outlet (204) and sends it to the controller (101). 15. The detection and maintenance method according to claim 14, characterized in that the outlet temperature detector (103) detects the temperature of the liquid at the outlet (204) and sends it to the controller (101) comprising: When the controller (101) issues the command to start the heater (201), the outlet temperature detector (103) measures the first temperature of the liquid at the outlet (204) and sends it to the said controller (101); After waiting for the preset period of time, the outlet temperature detector (103) measures a second temperature of the liquid at the outlet (204) and sends it to the controller (101). 16. The detection and maintenance method according to claim 15, the controller (101) calculating the temperature change parameters of the liquid within a preset time period according to the received temperature includes: The controller (101) calculates a temperature change parameter of the liquid within a preset time period according to the received first temperature and the received second temperature. 17. The detection and maintenance method according to any one of claims 11, 12, 13 or 16, wherein the temperature change parameter includes a temperature change rate, and the preset value includes a preset temperature change rate. 18. The detection and maintenance method according to claim 17, wherein the method further comprises: The controller (101) judges whether it is necessary to adjust the power of the heater (201) according to the temperature change parameter, the preset value and/or the temperature required by the generator set, and when it is necessary to adjust the power of the heater (201). When the power of the heater (201) is adjusted, a power adjustment instruction is sent to the heater (201). 19. The detection and maintenance method according to claim 15, wherein the method further comprises: After waiting for the preset period of time, the inlet temperature detector (104) measures a third temperature of the liquid at the inlet (203) and sends it to the controller (101); The controller (101) executes one or more of the following judgments: When the second temperature is less than or equal to the third temperature, it is determined that the setting positions of the inlet temperature detector (104) and the outlet temperature detector (103) are opposite; When the second temperature is greater than the third temperature and the first temperature, it is determined that the detection and maintenance system is normal; When the second temperature is greater than the third temperature and less than or equal to the first temperature, it is determined that the external pipeline is faulty. 20. The inspection and maintenance method according to claim 11, characterized in that the method further comprises: The controller (101) receives the temperature of the liquid detected by the temperature detector, and determines whether to start or turn off the heater (201) according to the temperature of the liquid detected by the temperature detector and the temperature required by the generator set ).