CN111653957A - A partition control method for the environment in the substation control cabinet with its own battery - Google Patents

Abstract

The invention relates to a partition control method suitable for the environment in a substation control cabinet with its own storage battery. This method is aimed at the equipment in the cabinet of the modular control cabinet of the substation with its own battery, starting from the modular design concept, and adopts the scheme of "partitioned arrangement of equipment in the cabinet + diversified temperature control + single cabinet control + centralized control" to establish The partition remote control system of the cabinet environment of the intelligent control cabinet of the substation with its own battery solves the environmental control problem of the modular control cabinet of the substation with its own battery.

Description

A partition control method for the environment in the substation control cabinet with its own battery

technical field

The invention relates to a partition control method suitable for the environment in a substation control cabinet with its own storage battery.

Background technique

At present, there are three main ways to control the environment of the intelligent control cabinet:

1. Natural air cooling method

A fan (axial flow fan or centrifugal fan) is used to realize the convection of the air inside and outside the cabinet, exhaust the hot air in the cabinet to the outside of the cabinet, and at the same time suck the cold air outside the cabinet into the cabinet to realize the transfer of heat inside the cabinet.

Advantages: (1) The fan is simple in structure, small in size, easy to install and maintain; (2) Low energy consumption; (3) Low cost;

Disadvantages: (1) When the ambient temperature is too high in summer, the heat dissipation effect is poor, and it cannot bear the heavy responsibility of cooling the cabinet for a long time; (2) The protection level is low, and dust, moisture and corrosive gases enter the cabinet, and it is easy to accumulate dust and other dirt. And pollute the components in the cabinet, thereby aggravating the heat island effect of the components; (3) The fan can only dissipate heat and cool down, and the ambient temperature in winter is too low to heat the cabinet.

2. Heat exchanger cooling method

The heat exchanger device is a kind of use of the air outside the cabinet that is lower than the temperature inside the cabinet, and it is effectively exchanged through the heat exchange core, and the heat in the cabinet is transferred to the air outside the cabinet. When the heat exchanger is working, the air outside the cabinet and the air in the cabinet with different temperatures are driven by the fan to exchange heat through the partition plate made of metal material, and the airflow on both sides is 100% completely separated.

Advantages: (1) The protection level is high, which eliminates the possible pollution caused by humidity and dust in the cabinet, and avoids functions such as failures caused by heat, humidity, dust and other pollutants. (2) The heat dissipation effect is better than that of the fan.

Disadvantages: (1) Since the essence of the heat exchanger is heat conduction, the temperature in the cabinet is always higher than the ambient temperature. When the ambient temperature is too high in summer, the temperature in the cabinet will be too high; (2) The heat exchanger fan can only dissipate heat Cool down, the ambient temperature in winter is too low to heat the cabinet.

3. Air conditioner temperature control method

Cabinet air conditioners can be installed in a variety of ways, such as wall-mounted, semi-embedded, fully-embedded, and overhead. The cooling or heating can be determined according to the specific temperature in the cabinet.

Advantages: (1) The heat dissipation effect is good. Since the cold air is directly sent to the vicinity of the heat source, it can ensure that no hot spots appear in the cabinet; (2) The protection level is high, which can prevent dust, moisture and corrosive gases from entering the cabinet; (3) In winter When the ambient temperature is too low, it can be heated up.

Disadvantage: high energy consumption.

At present, the mainstream layout scheme of smart substations is to place the protection, measurement and control and other bay-level equipment on-site in the intelligent control cabinets of the corresponding bays. The intelligent control cabinet with its own battery has different requirements for environmental temperature and humidity due to protection, measurement and control, switches, smart components, batteries and other equipment. The equipment room is bad. Especially in the intelligent control cabinet with its own battery, the self-ignition of the battery and the fire caused by overheating cannot be ignored. Therefore, the environmental control of the intelligent control cabinet with its own battery is very important.

After the secondary equipment of the GIS prefabricated intelligent control cabinet is deployed, the temperature control has the following problems due to inconsistent temperature requirements.

1. The distribution of heat sources is scattered: the secondary equipment of the intelligent control cabinet is distributed, and the traditional equipment in the intelligent control cabinet is included, resulting in many types of equipment in the intelligent control cabinet. It is difficult to control, and it is impossible to cool down at a specific point.

2. The start-up delay of the refrigeration equipment: Since only one temperature and humidity controller is installed and placed at a fixed point, it will start when the surrounding ambient temperature does not reach the start-up conditions of the temperature and humidity controller. However, the heating situation of each device is inconsistent. Often, the temperature of a device with a large amount of heat has reached a very high temperature. However, the ambient temperature around the temperature and humidity probe has not reached the startup temperature of the temperature and humidity controller, and the air conditioner or other refrigeration devices cannot immediately Start, resulting in the heating equipment can not be cooled in time.

In view of the situation of the equipment in the modular control cabinet of the substation with its own storage battery, this application adopts the scheme of "divisional arrangement of equipment in the cabinet + diversified temperature control + single cabinet control + centralized control" based on the modular design concept to establish The partition remote control system of the cabinet environment of the intelligent control cabinet of the substation with its own battery solves the environmental control problem of the modular control cabinet of the substation with its own battery.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a partition control method suitable for the environment in the control cabinet of the substation with its own battery. The method starts from the modular design concept, and establishes a partition remote control of the environment in the intelligent control cabinet of the substation with its own battery. The system solves the environmental control problem of the substation modular control cabinet with its own battery.

In order to achieve the above object, the technical solution of the present invention is: a partition control method suitable for the environment in the substation control cabinet with its own storage battery, comprising the following steps:

Step S1, arranging the equipment in the intelligent control cabinet by partition: arranging the secondary equipment, traditional equipment, and energy storage equipment in the intelligent control cabinet in the intelligent area, the traditional area, and the energy storage area, respectively;

Step S2, according to the equipment materials and heating conditions of different equipment in the traditional area, the smart area, and the energy storage area, configure different environmental control equipment:

The temperature and humidity probes are evenly distributed in the traditional area, and each traditional equipment uses a heater for dehumidification without cooling equipment;

The smart area adopts the strategy of "fixed-point cooling and dehumidification", configures a temperature and humidity probe for each secondary equipment, and arranges a semiconductor refrigerator for each secondary equipment to conduct directional cooling according to the heating condition of each equipment;

The temperature and humidity probes are evenly distributed in the energy storage area, and high-power air conditioners are configured to cool and dehumidify according to the characteristics of the energy storage equipment;

Step S3, the intelligent control cabinet environment partition control strategy: connect the temperature and humidity probes in the traditional area, the intelligent area, and the energy storage area to a temperature control module, and at the same time connect the heater, semiconductor refrigerator, high-power air conditioner, power switch outside the cabinet, The energy storage device is connected to the temperature control module, the energy storage device is used to supply power to the temperature control module, and the temperature control module controls the heaters respectively according to the temperature detected by the temperature and humidity probes in the traditional area, the smart area, and the energy storage area. , semiconductor refrigerators, high-power air conditioners, if any temperature in the traditional area, intelligent area, and energy storage area is higher than the high temperature threshold, the temperature control module controls the power switch outside the cabinet to cut off the power outside the cabinet.

In an embodiment of the present invention, each intelligent control cabinet environment partition control system is connected to a switch to construct a substation whole station control cabinet environment control system.

In an embodiment of the present invention, the environment control system for the substation-wide control cabinet includes the following two control modes:

A. Automatic mode

In this mode, the temperature and humidity start value and return value can be set. When the temperature and humidity measured by the temperature and humidity probe reach the start value, the refrigeration dehumidifier will automatically start to work. When the temperature and humidity measured by the temperature and humidity probe reaches the return value, the cooling The dehumidifier automatically stops working; the refrigeration dehumidifier is a heater, a semiconductor refrigerator or a high-power air conditioner;

Obtain regional weather big data through the connection between the main server of the environmental control system of the total station control cabinet of the power station and the data center, and formulate the temperature control strategy of the environmental control system of the total station control cabinet of the power station according to the weather forecast data;

B. Manual mode

In this mode, there are two modes of remote control and local control:

When set to remote control, the start and stop of each refrigeration dehumidifier in each intelligent control cabinet can be controlled only in the background of the environmental control system;

When set to local control, only the intelligent control cabinet can control the start and stop of each refrigeration dehumidifier in each intelligent control cabinet.

In an embodiment of the present invention, it also includes a cabinet fire intelligent judgment process: evenly arrange detection controllers in each partition of the intelligent control cabinet, and the detection controllers integrate smoke, temperature, and gas sensors; The controller adopts methods including fixed threshold, multi-sensor fusion, and sensor trend judgment for intelligent fire detection.

In an embodiment of the present invention, the method for intelligent fire detection by means of sensor trend judgment is as follows:

According to the change speed of the detection value detected by the detection controller, the trend is judged. When the steepness of the data rise continues to increase and exceeds the preset allowable value, even if the detection value does not exceed the alarm threshold, an alarm signal is still issued to remind the operation and maintenance personnel. Note; specifically:

，即令探测值

、

、.......、

，当

时发出报警信号，

为预设允许值。Differentiate probe values into multiple

, even if the detection value

,

,......,

,when

When an alarm signal is issued,

Default allowable value.

Compared with the prior art, the present invention has the following beneficial effects: the method of the present invention starts from the modular design concept, and solves the problem of the substation with its own battery by establishing a substation remote control system for the internal environment of the intelligent control cabinet with its own battery. Environmental control issues for modular control cabinets.

Description of drawings

FIG. 1 is a schematic diagram of the partition layout of each device in the intelligent control cabinet of the present invention.

FIG. 2 is a schematic diagram of a single-cabinet environment control system of the present invention.

FIG. 3 is a schematic diagram of the environmental control system of the total station control cabinet of the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

The invention provides a partition control method suitable for the environment in a substation control cabinet with its own storage battery, comprising the following steps:

Step S1, arranging the equipment in the intelligent control cabinet by partition: arranging the secondary equipment, traditional equipment, and energy storage equipment in the intelligent control cabinet in the intelligent area, the traditional area, and the energy storage area, respectively;

Step S2, according to the equipment materials and heating conditions of different equipment in the traditional area, the smart area, and the energy storage area, configure different environmental control equipment:

The temperature and humidity probes are evenly distributed in the traditional area, and each traditional equipment uses a heater for dehumidification without cooling equipment;

The smart area adopts the strategy of "fixed-point cooling and dehumidification", configures a temperature and humidity probe for each secondary equipment, and arranges a semiconductor refrigerator for each secondary equipment to conduct directional cooling according to the heating condition of each equipment;

The temperature and humidity probes are evenly distributed in the energy storage area, and high-power air conditioners are configured to cool and dehumidify according to the characteristics of the energy storage equipment;

Step S3, the intelligent control cabinet environment partition control strategy: connect the temperature and humidity probes in the traditional area, the intelligent area, and the energy storage area to a temperature control module, and at the same time connect the heater, semiconductor refrigerator, high-power air conditioner, power switch outside the cabinet, The energy storage device is connected to the temperature control module, the energy storage device is used to supply power to the temperature control module, and the temperature control module controls the heaters respectively according to the temperature detected by the temperature and humidity probes in the traditional area, the smart area, and the energy storage area. , semiconductor refrigerators, high-power air conditioners, if any temperature in the traditional area, intelligent area, and energy storage area is higher than the high temperature threshold, the temperature control module controls the power switch outside the cabinet to cut off the power outside the cabinet.

The environmental partition control system of each intelligent control cabinet is connected to the switch to construct the environmental control system of the substation whole station control cabinet.

The following is a specific implementation process of the present invention.

The present invention is a partition control method suitable for the environment in the substation control cabinet with its own storage battery, and the realization is as follows:

1. The layout of the secondary equipment in the intelligent control cabinet (as shown in Figure 1).

The parallel DC battery and super capacitor are used as the modular control cabinet of the substation. The equipment in the cabinet includes protection, measurement and control, switches, intelligent components, batteries and other equipment. Various equipments have different requirements for ambient temperature and humidity, and different requirements for temperature detection.

Adopting the strategy of "centralized partitioning of heat sources", the secondary equipment of the prefabricated intelligent control cabinet is all electronic devices that are easily affected by heat, while the traditional equipment of the prefabricated intelligent control cabinet is not easily affected by heat. Therefore, the prefabricated intelligent control cabinet is divided into traditional area, intelligent area and energy storage area.

Secondary equipment such as protection, measurement and control, switches, and intelligent components are centrally arranged in the intelligent area.

Traditional relays, status display panels, pressure plates, etc. are arranged in the traditional area.

Equipment such as batteries and super capacitors are arranged in the energy storage area.

2. The environmental control equipment in the intelligent control cabinet is diversified.

According to the equipment materials and heating conditions of different equipment in the traditional area, intelligent area and energy storage area, configure different environmental control equipment.

(1) The temperature and humidity probes are evenly distributed in the traditional area. The equipment uses ordinary heaters for dehumidification without cooling equipment.

(2) The smart area adopts the strategy of "fixed-point cooling and dehumidification", and configures a temperature and humidity probe for each secondary device. Taking advantage of the simple structure, small size, and rapid cooling time of semiconductor refrigerators, each device is equipped with a semiconductor refrigerator to conduct directional cooling according to the heating conditions of each device.

(3) The energy storage area is equipped with a professional high-power air conditioner for cooling and dehumidification according to the characteristics of the battery.

3. Control method

(1) Single cabinet environmental control system (as shown in Figure 2)

A. Zone temperature control

Configure a temperature and humidity probe for each secondary device in the smart area.

B, over-temperature self-protection

If the temperature of any detection area is higher than the maximum allowable value, the power supply outside the cabinet will be cut off.

(2) Environmental control system of the total station control cabinet (as shown in Figure 3)

The single cabinet environment control system is connected to the switch, and then the switch is connected to the whole station control cabinet environment control system.

The structure of the whole control system is shown in Figure 3. There are two control modes as follows:

A. Automatic mode

In this mode, the start value and return value of temperature and humidity can be set. When the temperature and humidity measured by the sensor reach the starting value, the refrigeration dehumidifier automatically starts to work. When the temperature and humidity measured by the sensor reach the return value, the refrigeration dehumidifier automatically stops working. The whole process requires no manual intervention.

The regional weather big data is obtained through the connection between the main server of the environmental control system and the data center, and the temperature control strategy of the intelligent control cabinet of the whole station is formulated according to the weather forecast data.

B. Manual mode

In this mode, there are two modes of remote control and local control.

When set to remote control, the start and stop of each refrigeration dehumidifier in each intelligent control cabinet can be controlled only in the background of the environmental control system (generally set in the central control building or secondary equipment room).

When set to local control, only the intelligent control cabinet can control the start and stop of each refrigeration dehumidifier in each intelligent control cabinet.

4. Intelligent judgment of cabinet fire

Each partition of the cabinet is evenly arranged with detection controllers (integrated with smoke, temperature and gas sensors).

The temperature control system integrates the function of intelligent fire judgment, and carries out intelligent fire detection through the detection controller. Various methods such as fixed threshold, multi-sensor fusion, and sensor trend judgment are used to make judgments. When the high-sensitivity gas sensor detects an abnormal "thermal runaway gas concentration" or the smoke sensor detects "visible smoke" or multi-sensor (gas, smoke and temperature) composite judgment is abnormal, an early warning prompt will be given. Under the premise of early warning, the temperature sensor When an abnormal "temperature characteristic value" is detected and has a clear upward trend, a fire warning will be issued and the external power supply will be cut off.

In this embodiment, the method for intelligent fire detection by means of sensor trend judgment is as follows:

According to the change speed of the detection value detected by the detection controller, the trend is judged. When the steepness of the data rise continues to increase and exceeds the preset allowable value, even if the detection value does not exceed the alarm threshold, an alarm signal is still issued to remind the operation and maintenance personnel. Note; specifically:

，即令探测值

、

、.......、

，当

时发出报警信号，

为预设允许值。Differentiate probe values into multiple

, even if the detection value

,

,......,

,when

When an alarm signal is issued,

Default allowable value.

The above are the preferred embodiments of the present invention, all changes made according to the technical solutions of the present invention, when the resulting functional effects do not exceed the scope of the technical solutions of the present invention, belong to the protection scope of the present invention.

Claims (5)

1. A partition control method suitable for the environment in a substation control cabinet with a storage battery is characterized by comprising the following steps:

step S1, arranging the equipment in the intelligent control cabinet in a partition mode: respectively arranging secondary equipment, traditional equipment and energy storage equipment in an intelligent control cabinet in an intelligent area, a traditional area and an energy storage area;

step S2, configuring different environment control devices aiming at the device materials and heating conditions of different devices in the traditional area, the intelligent area and the energy storage area:

temperature and humidity probes are uniformly distributed in the traditional area, and each traditional device adopts a heater for dehumidification and is not provided with a cooling device;

the intelligent area adopts a 'fixed-point cooling and dehumidifying' strategy, a temperature and humidity probe is configured for each secondary device, a semiconductor refrigerator is arranged for each secondary device, and directional cooling is carried out according to the heating condition of each device;

temperature and humidity probes are uniformly distributed in the energy storage area, and a high-power air conditioner is configured according to the characteristics of energy storage equipment to cool and dehumidify;

step S3, controlling the environment partition of the intelligent control cabinet: connect the humiture probe in tradition district, intelligent district, energy storage district with a temperature control module, simultaneously with heater, semiconductor cooler, high-power air conditioner, the outer switch of cabinet, energy storage equipment with temperature control module connects, and energy storage equipment is used for doing the power supply of temperature control module, temperature control module control the work of heater, semiconductor cooler, high-power air conditioner respectively according to the temperature condition that the humiture probe in tradition district, intelligent district, energy storage district detected, if the arbitrary temperature in tradition district, intelligent district, energy storage district is higher than the high temperature threshold value, then the outer switch of temperature control module control cabinet cuts off the outer power of cabinet.

2. The method of claim 1, wherein each intelligent control cabinet environmental zone control system access switch is configured to construct a substation total station control cabinet environmental control system.

3. The zonal control method for the environment inside the substation control cabinet with the battery as claimed in claim 2, wherein the substation total station control cabinet environment control system comprises the following two control modes:

A. automatic mode

In the mode, a temperature and humidity starting value and a temperature and humidity returning value can be set, when the temperature and humidity measured by the temperature and humidity probe reaches the starting value, the refrigeration dehumidifier automatically starts to work, and when the temperature and humidity measured by the temperature and humidity probe reaches the returning value, the refrigeration dehumidifier automatically stops working; the refrigeration dehumidifier is a heater, a semiconductor refrigerator or a high-power air conditioner;

acquiring regional weather big data through connection of a main server of the power station total station control cabinet environment control system and a data center, and formulating a temperature control strategy of the power station total station control cabinet environment control system according to weather forecast data;

B. manual mode

In this mode, there are two modes of remote control and local control:

when the remote control is set, the start and stop of each refrigeration dehumidifier in each intelligent control cabinet can be controlled only at the background of the environment control system;

when the intelligent control cabinet is set to be controlled on site, the start and stop of each refrigeration dehumidifier in each intelligent control cabinet can be controlled only by the intelligent control cabinet.

4. The zone control method suitable for the environment in the substation control cabinet with the storage battery of any one of claims 1 to 3, further comprising a cabinet body fire intelligent judgment process: the detection controllers are uniformly distributed in each partition of the intelligent control cabinet and are integrated with the smoke-sensing, temperature-sensing and gas sensors; the intelligent fire detection is carried out by a detection controller by means of fixed threshold, multi-sensor fusion and sensor trend judgment.

5. The zone control method suitable for the environment in the substation control cabinet with the storage battery as claimed in claim 4, wherein the intelligent fire detection by means of sensor trend judgment is as follows:

judging the trend according to the change speed of the detection value detected by the detection controller, and sending an alarm signal to remind operation and maintenance personnel to pay attention even if the detection value does not exceed the alarm threshold value when the gradient of data rising is continuously increased and exceeds a preset allowable value; specifically, the method comprises the following steps:

differentiating the detection values into a plurality

Prompt detection value

、

、.......、

When is coming into contact with

When the alarm signal is sent out,

is a preset allowable value.

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