WO2021047223A1 - High-voltage direct current power transmission converter valve tower provided with fire monitoring functions - Google Patents

Abstract

A high-voltage direct current power transmission converter valve tower provided with fire monitoring functions, comprising at least two valve layers, a shield cover being provided above above the top-end valve layer, and further comprising a detection module. The detection module comprises a controller, and further comprises at least one gas temperature sensor and/or at least one smoke sensor. The controller is respectively connected to the gas temperature sensor and/or the smoke sensor. The gas temperature sensor and/or the smoke sensor are disposed in the shield cover. The detection module is disposed in the shield cover at the top-end valve layer, may quickly detect changes in temperature by using the natural rising properties of a hot gas flow, and may thereby quickly provide an early warning at an early stage of a fire incident, and improve the real-time performance and reliability of early warning for fires in valve towers.

Description

High-voltage direct current transmission converter valve valve tower with fire monitoring function

Cross-references to related applications

This application is filed based on the Chinese patent application with the application number 201910854452.9 and the filing date of September 10, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

The application relates to a high-voltage direct current transmission converter valve valve tower with a fire monitoring function.

Background technique

The converter valve is one of the core equipment of high-voltage direct current transmission. Its function is to complete the AC-DC conversion. The AC power is converted into DC power at the rectifier station, and the DC power is converted into AC power at the inverter station. At present, most of the DC transmission projects that have been put into operation and are under construction are of ±800kV UHV voltage level, in addition to a small number of ±1100kV UHV voltage levels. The converter valve equipment is composed of a variety of electrical components. It has long-term work in high-voltage, high-current and harsh operating environments. It is affected by various factors such as component aging and high-voltage shocks. It may commutation during long-term operation. The heating of the internal components of the valve can cause a hidden danger of fire accidents, which will not only cause the shutdown of the DC transmission project, but also may cause fire safety accidents in the converter valve or valve hall in severe cases.

In order to reduce fire accidents caused by damage to equipment components, the current measures are as follows:

(1) Operation and maintenance personnel hold thermal imaging equipment to observe problems in various positions of the valve tower, which increases the work intensity of operation and maintenance personnel, and accidents during inspections will cause safety problems for operation and maintenance personnel;

(2) Through the machine inspection of the imaging equipment, the converter station monitors the temperature and fire of the converter valve tower, mainly through the infrared camera and the video camera pan-tilt installed on the inner wall of the valve hall. The state of the outside of the valve tower is monitored, and the imaging device on the side wall of the valve hall is relatively far away from the structure of the converter valve components, and there will be many dead spots in the measurement due to the structure of the valve tower.

None of the above measures can timely and accurately obtain the dynamic parameters inside the valve tower, resulting in poor monitoring effects, and therefore cannot make an effective and reliable judgment on whether a fire occurs in the valve tower.

Summary of the invention

The purpose of the present application is to provide a high-voltage direct current transmission converter valve valve tower with a fire monitoring function, so as to solve the problem that the prior art has a poor monitoring effect on whether a fire occurs in the valve tower.

To achieve the above objective, this application proposes a high-voltage direct current transmission converter valve valve tower with fire monitoring function, which includes at least two valve layers, a shielding cover is provided above the top valve layer, and a detection module. It includes a controller, the detection module further includes at least one gas temperature sensor and/or at least one smoke sensor, the controller is connected to the gas temperature sensor and/or the smoke sensor; the gas temperature sensor and/or the smoke sensor are arranged in the Mentioned in the shielding cover.

Beneficial effects: The detection module of the present application is arranged in the top valve layer shielding cover. Using the characteristics of the natural rise of hot air flow, the detection module can quickly detect the temperature and/or smoke, so that it can quickly warn the occurrence of early fire hazards and improve Improve the real-time and reliability of the valve tower fire warning.

Further, the gas temperature sensor and/or the smoke sensor are arranged on the inner side wall of the shielding cover to avoid the top valve layer for installation. Because each valve layer is avoided, the installation is convenient, and it is also convenient for the later valve layer to be installed. Maintenance and overhaul of components.

Further, the power terminal of the detection module is connected to the control power supply of the top valve layer. Power is taken directly through the top valve layer, making the installation structure simple.

Further, the detection module further includes a battery. The battery can be used as a backup power source, and the auxiliary control power supply can supply power to the detection module, or can independently supply power to the detection module.

Further, it also includes an alarm, which is installed and fixed on the edge part of the upper part of the shielding cover. It is convenient for operation and maintenance personnel to find out in time and perform corresponding operations.

Further, the alarm is located at the four corners of the outer side of the shielding cover, and the four corners are not equipped with valve devices, and are arranged at intervals from the valve layer.

Description of the drawings

Figure 1 is a schematic diagram of the valve tower structure of the application;

Figure 2 is a flow chart of the application for fire monitoring.

detailed description

In order to make the purpose, technical solutions, and advantages of the application more clear, the application will be further described in detail below with reference to the accompanying drawings and embodiments, but the implementation of the application is not limited thereto.

The main idea of this application is to install the detection module in the shielding cover on the top of the valve tower. If a fire occurs, based on the natural and rapid rise of the hot air flow, the gas temperature sensor in the detection module on the top can detect the temperature. Change, the smoke sensor can detect whether there is smoke, and it can be detected in the early stage of the fire, which is convenient for the operation and maintenance personnel to handle in advance, improves the timeliness and reliability of the valve tower fire warning, and also ensures the valve tower operation safety.

Valve tower embodiment:

The high-voltage direct current transmission converter valve valve tower is shown in Figure 1. It includes multiple valve layers. A shielding cover is provided on the top of the valve tower, that is, above the valve layer at the top. The valve tower includes a detection module. The detection module includes a controller, four One gas temperature sensor and four smoke sensors. The controller is connected to the gas temperature sensor and the smoke sensor respectively. The gas temperature sensor can be a non-contact infrared thermometer or a contact thermistor.

In this embodiment, the gas temperature sensor is an infrared thermometer, because any object will produce infrared radiation, of course, including the hot air flow generated by the fire, because the infrared thermometer is a non-contact measurement, which can be used when the hot air flow is generated. It can be detected in advance by radiation, which is helpful for timely detection of fire hazards. However, the contact type thermistor will only output the corresponding temperature when the hot air flows through the thermistor, and the response of the detection result is slow.

As other embodiments, the detection module includes a gas temperature sensor or a smoke sensor.

Both the infrared thermometer and the smoke sensor are arranged in the shielding cover. Specifically, the infrared thermometer and the smoke sensor are fixedly installed on the inner side wall of the shielding cover, and specifically installed at the four corners of the upper edge of the shielding cover. When viewed longitudinally, the installation of the smoke sensor and the infrared thermometer and the top valve The layers are not in contact with each other, avoiding the top valve layer. When viewed from above, the smoke sensor and infrared thermometer are installed outside the valve layer.

If a component of the converter valve is aging, the temperature is high or sparks are generated, the hot air flow will rise through the gap between the valve layer and the gap between the valve layer and the valve hall under the block of the valve device. The valve layer will be affected by the valve device. It affects the flow of hot air and also affects infrared radiation, which makes it difficult to be quickly detected by infrared thermometers. Therefore, infrared thermometers and smoke sensors are arranged at the four corners of the edge of the shielding cover.

Infrared thermometers and smoke sensors are installed at the four corners of the edge. There are no valve components installed at these four corners, which are separated from the valve layer. They are free and unobstructed spaces and will not affect the electrical characteristics of the converter valve itself. Makes the installation convenient, and in the later maintenance and regular re-inspection, it will not affect the operation of the valve layer device, and will not affect the detection and use of the sensor during the operation. Therefore, the infrared thermometer and the smoke sensor are guaranteed. Reliability of test results.

In addition, the installation at the four corners can achieve full-angle coverage of the valve tower, can quickly and accurately warn of early fire accidents inside the valve tower, and can make up for the inability of existing monitoring methods to monitor the inside of the valve tower, and the long distance leads to poor monitoring effects. Monitoring effect of fire hazard in flow valve tower.

The infrared thermometer detects the temperature of the valve components in the tower in real time. When the detected temperature is greater than the set temperature threshold, it is judged as over-temperature and there is a hidden danger of fire, and the alarm is triggered to output an alarm signal.

The smoke sensor detects in real time whether there is fire smoke in the airflow naturally rising from the bottom of the valve tower. When the detected smoke concentration is greater than the set concentration threshold, it is determined that there is a hidden danger of fire, and the alarm is triggered to output an alarm signal.

The infrared thermometer and the smoke sensor work at the same time to jointly monitor the fire hazard in the valve tower in real time. As shown in Figure 2, each can trigger the alarm separately to output an alarm signal for operation and maintenance personnel to view and process. specific:

First, install gas temperature sensors and smoke sensors on the inner side of the shielding cover on the top of the valve tower, and install alarms at the four corners of the outer edge of the shielding cover.

Then, the detection module in the valve tower starts to detect the temperature and smoke concentration in the valve tower:

When the detected temperature is greater than the set temperature threshold, it is judged as over-temperature and there is a hidden danger of fire, and the alarm is triggered to output an alarm signal to remind the operation and maintenance personnel to conduct timely inspections to avoid the occurrence of fire; otherwise, the alarm is turned off. Indicates that there is no fire hazard;

When the detected smoke concentration is greater than the set concentration threshold, it is determined that there is a hidden danger of fire, and the alarm is triggered to output an alarm signal to remind the operation and maintenance personnel to patrol and deal with it in time to avoid the occurrence of fire; otherwise, the alarm is turned off, indicating that there is no fire Hidden danger

At the same time, it detects temperature and smoke density. When either condition is met, an alarm will be triggered. When both conditions are not met, no alarm signal will be output, which improves the accuracy of fire warning and ensures the safety of the valve tower. .

The alarm is fixedly installed on the edge of the upper part of the shielding cover, specifically at the four corners of the outer edge of the shielding cover, including sound and light alarms. Through the sound and light dual alarm output, the reliability of the alarm output is improved. For example: when the infrared thermometer detects that there is a hidden danger of fire, the alarm signal output by the alarm is a long whistle sound, and when the smoke sensor detects that there is a hidden danger of fire, the alarm signal output by the alarm is a flashing light. It is convenient for the operation and maintenance personnel to quickly take corresponding measures according to different alarm signals; as other implementation methods, the infrared thermometer and the smoke sensor can both send out sound and light alarm signals at the same time when detecting that there is a hidden danger of fire.

The power terminal of the detection module is connected to the control power supply of the top valve layer, and the power is directly taken through the control power supply of the top valve layer; the power terminal of the detection module is a directly connected battery, and the high potential isolation between the battery and the valve tower can avoid a high voltage loop. Build the power supply loop again in the middle; the power end of the detection module can be connected to the control power supply of the top valve layer and the battery at the same time, and the battery assists the control power supply of the top valve layer to supply power to the detection module, which can improve the power supply reliability of the detection module.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application and not to limit the scope of protection. Although the application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that this Those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation of the application after reading this application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims of this application.

Claims (6)

1. A high-voltage direct current transmission converter valve valve tower with fire monitoring function includes at least two valve layers, a shielding cover is arranged above the top valve layer, and further includes:

   The detection module includes a controller, the detection module further includes at least one gas temperature sensor and/or at least one smoke sensor, and the controller is connected to the gas temperature sensor and/or the smoke sensor; the gas temperature sensor and/or The smoke sensor is arranged in the shielding cover.
2. The high-voltage direct current transmission valve tower with fire monitoring function according to claim 1, wherein the gas temperature sensor and/or the smoke sensor are arranged on the inner side wall of the shielding cover.
3. The high voltage direct current transmission converter valve valve tower according to claim 1, wherein the power terminal of the detection module is connected to the control power source of the top valve layer.
4. The high-voltage direct current transmission converter valve valve tower with fire monitoring function according to claim 1 or 3, wherein the detection module further comprises a battery.
5. The high-voltage direct current transmission converter valve valve tower with fire monitoring function according to claim 1, further comprising an alarm, which is installed and fixed on the edge part of the upper part of the shielding cover.
6. The high-voltage direct current transmission converter valve valve tower with fire monitoring function according to claim 5, wherein the alarm is at the four corners of the outer side of the shielding cover, and there are no valve devices installed at the four corners. Layer interval setting.

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