CN112701786B - 220kV and below electric voltage class skid-mounted electronic control integrated transformer substation - Google Patents
220kV and below electric voltage class skid-mounted electronic control integrated transformer substation Download PDFInfo
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Abstract
The invention provides a skid-mounted electric control integrated transformer substation with voltage class of 220kV and below, wherein a main transformer chamber and a main transformer heat dissipation chamber are arranged in the transformer substation, and the transformer substation comprises a skid body, an automatic control protection unit, an intelligent power supply unit, an operation and maintenance environment intelligent monitoring system and an intelligent equipment management service system. The high-voltage distribution unit adopts GIS combined electrical equipment, adopts a basin-type insulator to connect a bus, the basin-type insulator adopts a double-circular shielding inner ring structure, gas sealing is carried out through double sealing rings, and each design parameter in the double-circular shielding inner ring structure is determined according to a preset constraint condition and a target function. The invention enables the remote control personnel to pay attention to abnormal information more quickly and take corresponding measures, thereby not only enabling the interaction between the equipment and the remote control center and between the equipment and the client to be more efficient and smoother, but also improving the safety and automation level of the operation of the device, and being suitable for the scattered power supply use requirements of the equipment in oil and gas field engineering.
Description
Technical Field
The application relates to the technical field of oil and gas field electronic control, in particular to a 220kV and below voltage class skid-mounted electronic control integrated transformer substation with an intelligent management function.
Background
At present, most of 220kV or 110kV (including the following grades) transformer substations operated in the market are traditional civil structure or common prefabricated transformer substations, the traditional civil structure transformer substations have large occupied area, long construction period, low reusability and serious pollution in the construction process, and the economic and environment-friendly properties are extremely low for most of cities with extremely short construction land; the common pre-installed substation is generally only used for a power supply end with low power supply quality requirement, has relatively single product function, generally does not have unattended conditions and functions, is mostly unattended after equipment is put into operation, cannot accurately and timely master the operation environment of electrical equipment inside a house, the safety conditions around the equipment, possible electrical fires and the operation parameters and states of the equipment, and has the defects of hidden dangers brought to the operation of the equipment and the unattended operation in the real sense, and is usually only treated after an accident occurs, so that some unavoidable losses are caused, the problems are fundamentally solved, early warning is carried out in advance, and the fact that the equipment is particularly important and urgent.
Therefore, the intelligent 220kV or 110kV skid-mounted integrated transformer substation has the advantages of smaller floor area, shorter construction period, higher economic and environmental protection performance, stronger environmental perception capability and better suitability for unattended operation. The transformer substation can better monitor temperature, humidity, air pressure, security, electrical service life and state parameters in a device and the operation environment thereof in a targeted manner through an intelligent power distribution unit, an automatic control protection unit, an intelligent power supply unit, an operation and maintenance environment intelligent monitoring system and an intelligent device management service system, and a user monitors and processes information through a computer terminal, a computer Web end and a mobile phone App end through a control center or an intelligent device management service platform.
Disclosure of Invention
The application provides an automatically controlled integrated transformer substation of 220kV and following skid-mounted voltage class to improve the land used contradiction, shorten the construction cycle, improve construction economy feature of environmental protection, overcome prior art ' unmanned on duty ' can't master the defect of equipment fortune dimension environment in real time, innovated intelligent equipment management service platform, the user can inquire, monitor and handle equipment information through computer Web end, cell-phone App end.
The technical scheme adopted by the application is as follows:
a skid-mounted electric control integrated transformer substation with voltage class of 220kV and below is provided with a main transformer chamber and a main transformer heat dissipation chamber, and comprises an intelligent power distribution unit, a skid body, an automatic control protection unit, an intelligent power supply unit, an operation and maintenance environment intelligent monitoring system and an intelligent equipment management service system;
the intelligent power distribution unit is connected with the intelligent equipment management service system and comprises an intelligent circuit breaker temperature intelligent monitoring and diagnosing system, a characteristic parameter real-time intelligent monitoring and diagnosing system and a high-voltage power distribution unit, wherein the intelligent circuit breaker temperature intelligent monitoring and diagnosing system comprises a self-powered wireless temperature measuring sensor, an energy storage motor and opening and closing coil monitoring device, a residual electrical service life monitoring device and a mechanical characteristic parameter monitoring device, and the high-voltage power distribution unit adopts GIS combined electrical equipment;
the GIS combined electrical equipment adopts a basin-type insulator to connect the bus, the basin-type insulator adopts a double-circular shielding inner ring structure, double sealing rings are adopted to carry out gas sealing, and design parameters of the outer diameter D of the circular shielding inner ring, the radius R and the distance V between the double-circular shielding inner rings in the double-circular shielding inner ring structure are determined according to preset constraint conditions and a target function;
the constraint conditions are as follows: v is more than or equal to 6 and less than or equal to 12, D is more than or equal to 4 and less than or equal to 7,205 and R is less than or equal to 215;
the objective function is:
wherein EmaxAMaximum field strength, E, for the surface of the epoxy resin casting bodymaxBFor shielding the maximum field intensity E at the junction of the inner ring and the epoxy resin casting bodymaxCMaximum field strength E of air gap between epoxy resin casting body and metal flangemaxDThe maximum field intensity of the surface of the sealing ring;
the design parameters obtained were D5.29 mm, R212.6 mm, V11.93 mm;
the intelligent monitoring and diagnosing system for the temperature of the intelligent circuit breaker obtains a temperature rise signal through a self-powered wireless temperature measuring sensor arranged on a contact arm of the high-voltage vacuum circuit breaker, a bus and a cable lap joint surface, judges and gives early warning information according to a preset value, and uploads the early warning information of the temperature rise signal to the intelligent equipment management service system;
the intelligent circuit breaker temperature monitoring and diagnosing system monitors the current of the energy storage motor and the opening and closing coil on line through the energy storage motor and the opening and closing coil monitoring device, monitors the opening and closing short-circuit current times of the circuit breaker and the opening and closing times of the circuit breaker respectively through the residual electrical service life monitoring device and the mechanical characteristic parameter monitoring device, and sends the obtained current information of the energy storage motor and the opening and closing coil, the opening and closing short-circuit current times information of the circuit breaker and the opening and closing times information of the circuit breaker to the characteristic parameter real-time intelligent monitoring and diagnosing system;
the characteristic parameter real-time intelligent monitoring and diagnosing system is connected with the intelligent equipment management service system, compares the acquired current information of the energy storage motor and the opening and closing coil, the information of the opening and closing short circuit times of the circuit breaker and the information of the opening and closing times of the circuit breaker with respective preset values respectively to judge respective early warning information, and sends the respective early warning information to the intelligent equipment management service system;
the operation and maintenance environment intelligent monitoring system is respectively connected with the automatic control protection unit and the intelligent equipment management service system, the operation and maintenance environment intelligent monitoring system comprises an environment monitoring detector, an operation and maintenance environment control unit and a display unit which are distributed in the sledge, the environment monitoring detector comprises a first sensor for monitoring the temperature and the humidity in the sledge, a second sensor for monitoring the air pressure in the sledge, a third sensor for security entrance guard, a fourth sensor for electrical fire in the sledge, a fifth sensor for monitoring water immersion and a sixth sensor group for monitoring the electric quantity and non-electric quantity parameters of the power distribution unit, the operation and maintenance environment intelligent monitoring unit reads the temperature, the humidity, the air pressure, the entrance guard state, the temperature-sensing smoke signal, the water immersion signal, the electric quantity and the non-electric quantity parameters of the power distribution unit, the operation and maintenance environment control unit has a first control mode and a second control mode, the first control mode is used for intelligent management control, and the second control mode is used for remote centralized management control;
the automatic control protection unit comprises an intelligent sand-proof heating and ventilating device, an air conditioning device and a dehumidifying device.
Further, the operation and maintenance environment control unit is in a first control mode by default, and when the operation and maintenance environment control unit is in the first control mode:
when the first sensor detects that the temperature in the sledge body exceeds a preset first temperature threshold or the humidity exceeds a preset first humidity threshold, the operation and maintenance environment control unit sends a cooling instruction to the automatic control protection unit, and an intelligent sand-proof heating and ventilation device in the automatic control protection unit works in a ventilation mode to automatically open a dust-proof and sand-proof wind window for cooling or dehumidifying; when the first temperature and humidity sensor detects that the temperature in the sledge body exceeds a preset second temperature threshold value or is lower than a preset third temperature threshold value, the operation and maintenance environment control unit simultaneously sends an air conditioning instruction and a heat preservation instruction to the automatic control protection unit, starts an air conditioning device according to the air conditioning instruction, automatically closes the dustproof and sand-proof wind window according to the heat preservation instruction, works in a heat preservation and insulation mode, and cools or heats the temperature in the sledge body through the intelligent sand-proof heating and ventilation device;
when the humidity in the pry body exceeds a preset second humidity threshold value, the operation and maintenance environment control unit sends a dehumidification instruction to the automatic control protection unit, and a dehumidification device is started to perform dehumidification treatment on the interior of the pry body according to the dehumidification instruction;
when the second sensor detects that the air pressure in the closed skid body is lower than the preset atmospheric pressure, the operation and maintenance environment control unit sends an air inlet instruction to the automatic control protection unit according to logic judgment, and an air inlet fan and an air window of the intelligent sand prevention heating and ventilation device are opened according to the air inlet instruction;
when the air pressure reaches the preset air inlet pressure, the operation and maintenance environment control unit sends a turn-off instruction to the automatic control protection unit according to logic judgment, an air inlet fan and an air window of the intelligent sand-proof heating and ventilation device are closed, the pressure in the sledge is kept to be micro-positive pressure, and the influence of the micro-dust environment and the altitude height in the sledge on the insulation strength of a power distribution unit or an equipment air chamber is improved;
when the signals transmitted by the third sensor, the fourth sensor and the fifth sensor for detecting the security entrance guard, the fourth sensor for electrical fire in the sledge and the fifth sensor for monitoring water immersion are abnormal, when the sixth sensor group detects that the electric quantity and the non-electric quantity of the power distribution unit have deviation from the preset value, the sixth sensor group can automatically give an alarm and timely inform operation and maintenance personnel to process, and when the deviation is serious, the sixth sensor group can automatically send out a signal to stop the operation and maintenance personnel, wherein the non-electric quantity comprises the temperature of a cable lap joint surface and a contact.
Further, the operation and maintenance environment control unit may be switched from a first control mode to a second control mode, and when the operation and maintenance environment control unit is in the first control mode: and comparing and judging the acquired environmental monitoring data with a preset value by operation and maintenance management personnel, and sending a control instruction to the transformer substation through the remote centralized control center or the cloud server.
Through the embodiment of the application, the following technical effects can be obtained:
1) according to the 220kV or 110kV skid-mounted electronic control integrated substation, the operation and maintenance environment intelligent monitoring system and the intelligent equipment management service system are adopted, all detection or monitoring information of corresponding equipment in the substation can be integrated, corresponding auxiliary equipment in the substation can be controlled according to the corresponding information, safe and reliable operation of the substation device can be monitored and controlled in an all-around manner, and the operating requirement of the unattended substation device is very suitable through the reliability of the operation of the substation device;
2) when the data detected by the monitoring and detecting sensors exceed the preset values or are abnormal signals, the operation and maintenance environment control unit can manage the states in a grading way according to different priority levels and transmit the states to the remote control center or the cloud server according to the preset values, correspondingly, different reminding or requirements can be made for remote control personnel according to the information of the different levels transmitted to the remote control center or the cloud server, the working mode of the operation and maintenance environment control unit can be automatically switched or the running state of the equipment can be automatically controlled when the alarm information of the corresponding levels is sent out, so that the remote control personnel can quickly pay attention to the abnormal information and take corresponding measures, the interaction between the equipment and the remote control center as well as between the equipment and the client side is more efficient and smooth, and the running safety level and automation level of the device can be further improved, the device is very suitable for the power supply use requirement of comparatively dispersed equipment in oil and gas field engineering.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of the functional components of the skid-mounted integrated electronic control substation of the present invention;
FIG. 2 is a schematic diagram of an intelligent power distribution unit of the present invention;
FIG. 3 is a schematic diagram of an intelligent operation and maintenance environment monitoring system of the present invention;
FIG. 4 is a schematic diagram of an operation and maintenance environment control unit of the present invention;
fig. 5 is a schematic view of the structure of the basin-type insulator of the present invention.
Reference numerals:
1 double sealing ring, 2 gap air gaps, 3 double circular shielding inner rings, 4 metal flanges, 5 epoxy resin casting bodies and 6 conductors.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and 2, in the skid-mounted electronic control integrated transformer substation of the present invention, a main transformer chamber and a main transformer heat dissipation chamber are disposed in the transformer substation, and the transformer substation includes a skid body, an automatic control protection unit, an intelligent power supply unit, an intelligent operation and maintenance environment monitoring system, and an intelligent device management service system;
the intelligent power distribution unit is connected with the intelligent equipment management service system and comprises an intelligent circuit breaker temperature intelligent monitoring and diagnosing system, a characteristic parameter real-time intelligent monitoring and diagnosing system and a high-voltage power distribution unit, wherein the intelligent circuit breaker temperature intelligent monitoring and diagnosing system comprises a self-powered wireless temperature measuring sensor, an energy storage motor and opening and closing coil monitoring device, a residual electrical service life monitoring device and a mechanical characteristic parameter monitoring device;
the intelligent monitoring and diagnosing system for the temperature of the intelligent circuit breaker obtains a temperature rise signal through a self-powered wireless temperature measuring sensor arranged on a contact arm of the high-voltage vacuum circuit breaker, a bus and a cable lap joint surface, judges and gives early warning information according to a preset value, and uploads the early warning information of the temperature rise signal to the intelligent equipment management service system;
the intelligent circuit breaker temperature monitoring and diagnosing system monitors the current of the energy storage motor and the opening and closing coil on line through the energy storage motor and the opening and closing coil monitoring device, monitors the opening and closing short-circuit current times of the circuit breaker and the opening and closing times of the circuit breaker respectively through the residual electrical service life monitoring device and the mechanical characteristic parameter monitoring device, and sends the obtained current information of the energy storage motor and the opening and closing coil, the opening and closing short-circuit current times information of the circuit breaker and the opening and closing times information of the circuit breaker to the characteristic parameter real-time intelligent monitoring and diagnosing system;
the characteristic parameter real-time intelligent monitoring and diagnosing system is connected with the intelligent equipment management service system, compares the acquired current information of the energy storage motor and the opening and closing coil, the information of the opening and closing short circuit times of the circuit breaker and the information of the opening and closing times of the circuit breaker with respective preset values respectively to judge respective early warning information, and sends the respective early warning information to the intelligent equipment management service system;
the operation and maintenance environment intelligent monitoring system is respectively connected with the automatic control protection unit and the intelligent equipment management service system, the operation and maintenance environment intelligent monitoring system comprises an environment monitoring detector, an operation and maintenance environment control unit and a display unit which are distributed in the sledge, the environment monitoring detector comprises a first sensor for monitoring the temperature and the humidity in the sledge, a second sensor for monitoring the air pressure in the sledge, a third sensor for security entrance guard, a fourth sensor for electrical fire in the sledge, a fifth sensor for monitoring water immersion and a sixth sensor group for monitoring the electric quantity and non-electric quantity parameters of the power distribution unit, the operation and maintenance environment intelligent monitoring unit reads the temperature, the humidity, the air pressure, the entrance guard state, the temperature-sensing smoke signal, the water immersion signal, the electric quantity and the non-electric quantity parameters of the power distribution unit, the operation and maintenance environment control unit has a first control mode and a second control mode, the first control mode is used for intelligent management control, and the second control mode is used for remote centralized management control;
the automatic control protection unit comprises an intelligent sand-proof heating and ventilating device, an air conditioning device and a dehumidifying device;
the operation and maintenance environment control unit is in a first control mode by default, and when the operation and maintenance environment control unit is in the first control mode:
when the first sensor detects that the temperature in the sledge body exceeds a preset first temperature threshold or the humidity exceeds a preset first humidity threshold, the operation and maintenance environment control unit sends a cooling instruction to the automatic control protection unit, and an intelligent sand-proof heating and ventilation device in the automatic control protection unit works in a ventilation mode to automatically open a dust-proof and sand-proof wind window for cooling or dehumidifying;
when the first temperature and humidity sensor detects that the temperature in the sledge body exceeds a preset second temperature threshold value or is lower than a preset third temperature threshold value, the operation and maintenance environment control unit simultaneously sends an air conditioning instruction and a heat preservation instruction to the automatic control protection unit, starts an air conditioning device according to the air conditioning instruction, automatically closes the dustproof and sand-proof wind window according to the heat preservation instruction, works in a heat preservation and insulation mode, and cools or heats the temperature in the sledge body through the intelligent sand-proof heating and ventilation device;
when the humidity in the pry body exceeds a preset second humidity threshold value, the operation and maintenance environment control unit sends a dehumidification instruction to the automatic control protection unit, and a dehumidification device is started to perform dehumidification treatment on the interior of the pry body according to the dehumidification instruction;
when the second sensor detects that the air pressure in the closed skid body is lower than the preset atmospheric pressure, the operation and maintenance environment control unit sends an air inlet instruction to the automatic control protection unit according to logic judgment, and an air inlet fan and an air window of the intelligent sand prevention heating and ventilation device are opened according to the air inlet instruction;
when the air pressure reaches the preset air inlet pressure, the operation and maintenance environment control unit sends a turn-off instruction to the automatic control protection unit according to logic judgment, an air inlet fan and an air window of the intelligent sand-proof heating and ventilation device are closed, the pressure in the sledge is kept to be micro-positive pressure, and the influence of the micro-dust environment and the altitude height in the sledge on the insulation strength of a power distribution unit or an equipment air chamber is improved;
when the signals transmitted by the third sensor, the fourth sensor and the fifth sensor for security entrance guard, the fourth sensor for electrical fire in the sledge and the fifth sensor for monitoring water immersion are abnormal, when the sixth sensor group detects that the electric quantity and the non-electric quantity of the power distribution unit have deviation from a preset value, the sixth sensor group automatically gives an alarm to inform operation and maintenance personnel to process in time, and when the deviation is serious, the sixth sensor group automatically sends out a signal to stop the operation and maintenance personnel, wherein the non-electric quantity comprises the temperature of a cable lap joint surface and a contact head;
the operation and maintenance environment control unit can be switched from a first control mode to a second control mode, and when the operation and maintenance environment control unit is in the first control mode: and the operation and maintenance management personnel carry out comparison and judgment according to the acquired environment monitoring data and a preset value, and send control instructions to the transformer substation through the remote centralized control center or the cloud server, for example, the intelligent sand-proof heating and ventilation device fan and the air window are opened and closed, the air conditioning device is started and stopped, the mistaken entering voice warning and driving away are carried out, the power distribution unit is stopped and recovered, and the like.
It should be noted that the above-mentioned intelligent sand-prevention heating and ventilating device, air conditioning device, and dehumidifying device that use are all the existing devices in the prior art, and this application does not improve these devices themselves, as long as take the existing corresponding devices in the prior art to connect with the operation and maintenance environment control unit, so that can control the running state of these devices through the signal that the operation and maintenance environment control unit outputs can, and it is not described here too much.
The intelligent device management service system integrates device parameter acquisition and environment information data acquisition, data transmission, data analysis and other information technologies, realizes high-efficiency transmission from field devices to a cloud management platform and from a cloud to a client APP and Web, and performs multi-dimensional intelligent detection, analysis, alarm, maintenance and other safety management.
When data detected by the first sensor group, the second sensor group, the third sensor group, the fourth sensor group, the fifth sensor group and the sixth sensor group exceed respective corresponding set values or are abnormal signals, the operation and maintenance environment control unit divides the data or the signals into three levels of danger, warning and reminding according to preset values, transmits the three levels to a remote centralized control center or a cloud server (a storage layer and a service layer), and displays and manages the data or the signals in real time through a computer terminal of the centralized control center, a cloud client server APP and Web; when the remote centralized control center only displays the reminding information, the operation and maintenance environment control unit still works normally in the first control mode to remind the remote centralized control center to check corresponding data or signals in time, when the remote centralized control center or the cloud client displays the warning information but does not display the danger information, the operation and maintenance environment control unit can still work normally, but will automatically switch from the first control mode to the second control mode and issue an alarm, so that the remote centralized control center or the client can quickly check the alarm information and quickly intervene or process the field device in the second control mode according to the actual needs, when the remote centralized control center or the client displays the dangerous information, the operation and maintenance environment control unit automatically switches from the first control mode to the second control mode and stops the equipment in the station, and at the moment, the operation and maintenance personnel can recover the equipment operation after the fault is eliminated on site.
It should be noted that, when the data detected by the first to sixth sensors exceed the respective set values or are abnormal signals, the setting of different levels for the data or the signals may be different in different situations, which mainly depends on different application environments or technical requirements; for example, in general, in order to ensure the safe operation of a substation device, the level of voltage, current or power data index setting needs to be the highest (i.e., dangerous level), the levels of temperature, humidity, water immersion and smoke sensation signals need to be medium (i.e., alarm level), and the levels of atmospheric pressure and access control signals need to be the lowest (i.e., reminding level), which is also determined according to the actual situation of the oil field substation, and the level setting mode can ensure that a control unit can prompt or display various abnormal data or signals in time, and can reduce the workload of a remote control center or client personnel on the other hand, thereby avoiding the disadvantage that important prompt information is submerged or the control center personnel cannot see the important prompt information in time due to excessive data prompt information; in addition, the shutdown frequency, times or time of the substation equipment can be reduced to the greatest extent through the level setting mode, the oilfield equipment can work uninterruptedly as far as possible, and the use reliability and stability of the oilfield equipment are improved.
Certainly, in other different application occasions, the levels of the data or signals output by the different sensors can be adjusted or changed according to actual conditions or requirements, and the method is applicable as long as the method can ensure reliable transmission of the data or information, prompt a control center or customer personnel to check or process in time, and ensure stable and reliable operation of the whole substation device; in addition, in the actual operation process, the control center or the client personnel can change the previously preset level according to the actual needs so as to adapt to the requirements of different operation occasions, thereby providing greater flexibility.
Meanwhile, each system unit of the transformer substation device is modularized, arranged on a base of the sledge body according to technical requirements and connected with each other through a bus bar bridge (copper bar) and cables laid in cable grooves with strong and weak electricity separated to form an integral sledge block. The whole device leaves the factory in a complete set after production, processing and debugging in a factory, is integrally transported to a field site of an oil and gas field, and can be put into use by connecting associated equipment one by one through a reserved cable inlet and outlet end. Reach miniaturization, integrate, portable, only need with whole sled piece transport to the field installation good and set up corresponding input and output lead wire after can come into operation, improved the convenience of field installation's efficiency and use greatly.
The operation and maintenance environment intelligent monitoring unit collects output signals of all environment monitoring detectors through an I/O system of the operation and maintenance environment intelligent monitoring unit, and compares and analyzes the detection signals with preset values; when the environmental parameters exceed the limit, the control unit automatically sends alarm information and records the detection information in a database of the display unit, the database information can be uploaded to a control center or a cloud equipment management platform set up based on a cloud technology through a controller Internet of things transmission layer, and a user monitors and processes the information through a computer terminal, a Web end and a mobile phone App end.
The control unit reads the opening and closing state information of the entrance guard switch sensor through an I/O system of the control unit, when the sled body is monitored to be in an abnormal opening state, the control unit automatically sends alarm information, and the video monitoring unit in the sled records monitoring images and uploads the information.
The control unit reads the temperature parameters of the first temperature and humidity sensor and the air pressure parameters of the second sensor in an RS485 communication mode, displays the temperature parameters and the air pressure parameters on the display unit, controls corresponding equipment according to a preset program and uploads information.
The control unit collects water immersion signals through an I/O system of the control unit, and when the water immersion signals are collected, the control unit automatically sends alarm information and uploads the alarm information.
The control unit collects fire temperature and smoke sensing signals through an I/O system of the control unit, and when the fire signals are collected, the control unit automatically sends alarm information and uploads the alarm information.
The control unit acquires the electric quantity (voltage, current, power and the like) and the non-electric quantity (cable lap joint surface and contact temperature) of the power distribution unit through an I/O system of the control unit, when the acquired signals exceed the limit, the control unit gives an alarm, and when the limit is serious, the control unit automatically stops the equipment and uploads the information.
The direct current and inverter power supply unit is electrically connected with the operation and maintenance environment control unit, the protection unit, the lighting unit and the like so as to provide uninterrupted power supply.
The intelligent power distribution unit is characterized in that the intelligent power distribution unit is provided with a circuit breaker temperature intelligent monitoring and diagnosing system, a characteristic parameter real-time intelligent monitoring and diagnosing system (energy storage motor and opening and closing coil monitoring, residual electrical service life monitoring and mechanical characteristic parameter monitoring) and a chassis vehicle motor intelligent driving system which are arranged in a body of the intelligent power distribution unit, circuit breaker temperature signals (contact, bus and cable lap joints) and auxiliary equipment working current signals (energy storage motor and opening and closing coil) are collected, whether potential safety hazards exist or not (temperature rise of an electric contact surface is too high, coil or motor faults and the like) is analyzed and judged, when the collected signals exceed the limit, the monitoring and diagnosing system gives an alarm, and when the limit is serious, the control unit automatically stops equipment working and uploads information.
It should be noted that, in the embodiment of the present invention, the voltage class adopted by the skid-mounted electronic control integrated substation includes a voltage class of 220kV or 110kV and below, which may be specifically selected according to an actual working condition.
In order to meet the high-voltage requirement of 220kV or 110kV, the transformation of the power distribution unit mainly comprises the step of transforming the original power distribution device into a GIS combined electrical apparatus, namely, the high-voltage power distribution unit 8 adopts GIS combined electrical equipment, and the occupied area of the GIS combined electrical apparatus can be reduced by nearly 70% compared with the original power distribution unit.
A Gas Insulated Switchgear (GIS) is also called an SF6 full-enclosed switchgear, because it is composed of a bus, a circuit breaker, a transformer, an earthing switch, and the like, all of which are enclosed in a metal earthing case, and a full-enclosed switchgear using SF6 gas having excellent insulation and arc extinguishing properties as an insulating medium without using air. Compared with the conventional open high-voltage distribution equipment, the GIS has the advantages of smaller occupied area, more compact structure, more reliability, safety, flexibility and environmental protection. Therefore, the method is widely applied to ultrahigh voltage and extra-high voltage transformer substations in recent years. In the invention, the GIS combined electrical apparatus adopts the basin-type insulator to connect the bus, and the basin-type insulator has the vital functions of supporting the conductor, isolating the air chamber, electrically insulating and the like. In consideration of the fact that corona discharge is generated when the field intensity of the edge surface of the basin-type insulator exceeds the corona starting field intensity, the distribution of the edge surface electric field is taken as an important consideration in the design of the basin-type insulator when the basin-type insulator is designed.
The 220kV or 110kV basin-type insulator adopted by the invention is shown in figure 5, and adopts a double-circular shielding inner ring structure, wherein 1 is a double sealing ring, 2 is a gap air gap, 3 is a double-circular shielding inner ring, 4 is a metal flange, 5 is an epoxy resin casting body, 6 is a conductor, D is the outer diameter of the circular shielding inner ring, R is the radius, and V is the distance between the double-circular shielding inner rings. The design benchmark adopted by the basin-type insulator is as follows:
under the condition of meeting the design standard requirement, the applicant conducts repeated tests and parameter adjustment, and the data measured by specific experiments are as follows:
1) when the parameters D is 6mm, R is 210mm and V is 7.1mm, the maximum electric field intensity on the surface of the basin-type insulator is 11.90 kV/mm;
2) when the parameters D is 4.4mm, R is 210mm and V is 12mm, the maximum electric field intensity on the surface of the basin-type insulator is 11.67 kV/mm;
3) when the parameters D is 6mm, R is 213mm and V is 12mm, the maximum electric field intensity of the surface of the basin-type insulator is 11.51kV/mm respectively.
On the basis of the experimental data, in order to better optimize the maximum electric field intensity on the surface of the basin-type insulator, the following constraint conditions (in mm) and objective functions are set for the peripheral diameter D, the radius R and the circular ring distance V, and the outer diameter D of the circular shielding inner ring, the radius R and the double-circular shielding inner ring distance V are determined according to the constraint conditions and the objective functions: the constraint conditions are as follows: v is more than or equal to 6 and less than or equal to 12, D is more than or equal to 4 and less than or equal to 7,205 and R is less than or equal to 215
The objective function is
Wherein EmaxAMaximum field strength, E, for the surface of the epoxy resin casting bodymaxBFor shielding the maximum field intensity E at the junction of the inner ring and the epoxy resin casting bodymaxCMaximum field strength E of air gap between epoxy resin casting body and metal flangemaxDThe maximum field strength at the surface of the seal ring.
And when the design parameters are D (5.29 mm), R (212.6 mm) and V (11.93 mm) through screening of the constraint conditions and the objective function, when the double-circular shielding inner ring is designed by adopting the parameters (D (5.29 mm), R (212.6 mm) and V (11.93 mm), the maximum field intensity value of the surface of the basin-type insulator is 11.50kV/mm, which is further reduced than the minimum value of the maximum field intensity value of the surface measured before 11.51kV/mm, the maximum electric field intensity of the sealing ring junction, the air gap and the shielding inner ring junction is also reduced to a certain extent compared with the result measured before, the optimization effect is obvious, and the risk of flashover of the basin-type insulator is reduced.
In order to reasonably arrange the GIS combined electrical apparatus, ensure that the high-voltage distribution unit can save cost and improve the field utilization rate while meeting the requirement of power supply safety, the GIS combined electrical apparatus and the main transformer are jointly arranged in a transformer substation and provided with a main transformer chamber and a main transformer heat dissipation chamber.
The common state defects of partial discharge caused by GIS combined electrical equipment adopted in the high-voltage distribution unit in the operation process are as follows: free metal particle defects, high voltage conductor surface needle point defects, insulator internal air gap defects, insulator surface metal particle defects, floating electrode defects, and the like. And detecting the discharge signal of the GIS partial discharge through the characteristic parameter real-time intelligent monitoring and diagnosing system.
The running state that GIS combination electrical equipment that will detect in this application divide into "normal" state and "trouble" state two kinds, and wherein "normal" state specifically divide into: the "good" state, the "attention" state, and the "failure" state are specifically classified as: the high-voltage conductor comprises five types of free metal particles, a needle point on the surface of a high-voltage conductor, an air gap inside an insulator, metal particles on the surface of the insulator and a floating electrode.
In summary, the 220kV or 110kV skid-mounted electronic control integrated substation can centralize all detection or monitoring information of corresponding equipment in the substation and control corresponding auxiliary equipment in the device according to the corresponding information by adopting the operation and maintenance environment intelligent monitoring system and the intelligent equipment management service system, can monitor and control safe and reliable operation of the substation device in all directions, passes through the reliability of the operation of the device, and is very suitable for the use requirements of unattended substation devices; moreover, when the data detected by the monitoring and detecting sensors exceed the preset values or are abnormal signals, the operation and maintenance environment control unit can manage the states in a grading way according to different priority levels and transmit the states to the remote control center according to the preset values, correspondingly, different prompts or requirements can be made for remote control personnel or the cloud client according to the different level information transmitted to the remote control center, the working mode of the operation and maintenance environment control unit can be automatically switched or the running state of the equipment can be automatically controlled when the alarm information of the corresponding level is sent out, so that the remote control personnel or the cloud client can quickly pay attention to the abnormal information and take corresponding measures, the interaction between the field equipment and the remote control center as well as between the field equipment and the cloud client is more efficient and smooth, and the safety level and the automation level of the running of the device can be further improved, the device is very suitable for the power supply use requirement of comparatively dispersed equipment in oil and gas field engineering.
It should be noted that, the above detailed description is made on the control mode of the control unit, and in the specific implementation, a person skilled in the art may use a control element existing in the prior art to implement the control mode, such as a DSP, an FPGA, and other components, and the specific control mode may be written in the DSP or the FPGA in the form of software, or may be implemented by hardware, which is not described herein again, these are all conventional means in the prior art, and the present invention is not limited thereto.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (3)
1. A220 kV or 110kV skid-mounted electric control integrated transformer substation is characterized in that a main transformer chamber and a main transformer heat dissipation chamber are arranged in the transformer substation, and the transformer substation comprises an intelligent power distribution unit, a skid body, an automatic control protection unit, an intelligent power supply unit, an operation and maintenance environment intelligent monitoring system and an intelligent equipment management service system;
the intelligent power distribution unit is connected with the intelligent equipment management service system and comprises an intelligent circuit breaker temperature intelligent monitoring and diagnosis system, a characteristic parameter real-time intelligent monitoring and diagnosis system and a high-voltage power distribution unit, wherein the intelligent circuit breaker temperature intelligent monitoring and diagnosis system comprises a self-powered wireless temperature measuring sensor, an energy storage motor and opening and closing coil monitoring device, a residual electrical service life monitoring device and a mechanical characteristic parameter monitoring device, and the high-voltage power distribution unit adopts GIS combined electrical equipment;
the GIS combined electrical equipment adopts a basin-type insulator to connect the bus, the basin-type insulator adopts a double-circular shielding inner ring structure, double sealing rings are adopted to carry out gas sealing, and design parameters of the outer diameter D of the circular shielding inner ring, the radius R and the distance V between the double-circular shielding inner rings in the double-circular shielding inner ring structure are determined according to preset constraint conditions and a target function;
the constraint conditions are as follows: v is more than or equal to 6 and less than or equal to 12, D is more than or equal to 4 and less than or equal to 7, and R is more than or equal to 205 and less than or equal to 215;
the objective function is:
whereinE maxAThe maximum field intensity of the surface of the epoxy resin casting body,E maxBFor shielding the maximum field intensity at the junction of the inner ring and the epoxy resin casting body,E maxCThe maximum field intensity of an air gap between the epoxy resin casting body and the metal flange,E maxDThe maximum field intensity of the surface of the sealing ring;
the design parameters obtained were D =5.29 mm, R =212.6 mm, V =11.93 mm;
the intelligent monitoring and diagnosing system for the temperature of the intelligent circuit breaker obtains a temperature rise signal through a self-powered wireless temperature measuring sensor arranged on a contact arm of the high-voltage vacuum circuit breaker, a bus and a cable lap joint surface, judges and gives early warning information according to a preset value, and uploads the early warning information of the temperature rise signal to the intelligent equipment management service system;
the intelligent circuit breaker temperature monitoring and diagnosing system monitors the current of the energy storage motor and the opening and closing coil on line through the energy storage motor and the opening and closing coil monitoring device, monitors the opening and closing short-circuit current times of the circuit breaker and the opening and closing times of the circuit breaker respectively through the residual electrical service life monitoring device and the mechanical characteristic parameter monitoring device, and sends the obtained current information of the energy storage motor and the opening and closing coil, the opening and closing short-circuit current times information of the circuit breaker and the opening and closing times information of the circuit breaker to the characteristic parameter real-time intelligent monitoring and diagnosing system;
the characteristic parameter real-time intelligent monitoring and diagnosing system is connected with the intelligent equipment management service system, compares the acquired current information of the energy storage motor and the opening and closing coil, the information of the opening and closing short circuit times of the circuit breaker and the information of the opening and closing times of the circuit breaker with respective preset values respectively to judge respective early warning information, and sends the respective early warning information to the intelligent equipment management service system;
the operation and maintenance environment intelligent monitoring system is respectively connected with the automatic control protection unit and the intelligent equipment management service system, the operation and maintenance environment intelligent monitoring system comprises an environment monitoring detector, an operation and maintenance environment control unit and a display unit which are distributed in the sledge, the environment monitoring detector comprises a first sensor for monitoring the temperature and the humidity in the sledge, a second sensor for monitoring the air pressure in the sledge, a third sensor for security entrance guard, a fourth sensor for electrical fire in the sledge, a fifth sensor for monitoring water immersion and a sixth sensor group for monitoring the electric quantity and non-electric quantity parameters of the power distribution unit, the operation and maintenance environment intelligent monitoring system reads the temperature, the humidity, the air pressure, the entrance guard state, the temperature-sensing smoke signal, the water immersion signal, the electric quantity and the non-electric quantity parameters of the power distribution unit, the operation and maintenance environment control unit has a first control mode and a second control mode, the first control mode is used for intelligent management control, and the second control mode is used for remote centralized management control;
the automatic control protection unit comprises an intelligent sand-proof heating and ventilating device, an air conditioning device and a dehumidifying device.
2. The substation of claim 1,
the operation and maintenance environment control unit is in a first control mode by default, and when the operation and maintenance environment control unit is in the first control mode:
when the first sensor detects that the temperature in the sledge body exceeds a preset first temperature threshold or the humidity exceeds a preset first humidity threshold, the operation and maintenance environment control unit sends a cooling instruction to the automatic control protection unit, and an intelligent sand-proof heating and ventilation device in the automatic control protection unit works in a ventilation mode to automatically open a dust-proof and sand-proof wind window for cooling or dehumidifying;
when the first temperature and humidity sensor detects that the temperature in the sledge body exceeds a preset second temperature threshold value or is lower than a preset third temperature threshold value, the operation and maintenance environment control unit simultaneously sends an air conditioning instruction and a heat preservation instruction to the automatic control protection unit, starts an air conditioning device according to the air conditioning instruction, automatically closes the dustproof and sand-proof wind window according to the heat preservation instruction, works in a heat preservation and insulation mode, and cools or heats the temperature in the sledge body through the intelligent sand-proof heating and ventilation device;
when the humidity in the pry body exceeds a preset second humidity threshold value, the operation and maintenance environment control unit sends a dehumidification instruction to the automatic control protection unit, and a dehumidification device is started to perform dehumidification treatment on the interior of the pry body according to the dehumidification instruction;
when the second sensor detects that the air pressure in the closed skid body is lower than the preset atmospheric pressure, the operation and maintenance environment control unit sends an air inlet instruction to the automatic control protection unit according to logic judgment, and an air inlet fan and an air window of the intelligent sand prevention heating and ventilation device are opened according to the air inlet instruction;
when the air pressure reaches the preset air inlet pressure, the operation and maintenance environment control unit sends a turn-off instruction to the automatic control protection unit according to logic judgment, an air inlet fan and an air window of the intelligent sand-proof heating and ventilation device are closed, the pressure in the sledge is kept to be micro-positive pressure, and the influence of the micro-dust environment and the altitude height in the sledge on the insulation strength of a power distribution unit or an equipment air chamber is improved;
when the signals transmitted by the third sensor, the fourth sensor and the fifth sensor for detecting the security entrance guard, the fourth sensor for electrical fire in the sledge and the fifth sensor for monitoring water immersion are abnormal, when the sixth sensor group detects that the electric quantity and the non-electric quantity of the power distribution unit have deviation from the preset value, the sixth sensor group can automatically give an alarm and timely inform operation and maintenance personnel to process, and when the deviation is serious, the sixth sensor group can automatically send out a signal to stop the operation and maintenance personnel, wherein the non-electric quantity comprises the temperature of a cable lap joint surface and a contact.
3. The substation of claim 1, wherein the operation and maintenance environment control unit is switchable from a first control mode to a second control mode, and when the operation and maintenance environment control unit is in the first control mode: and comparing and judging the acquired environmental monitoring data with a preset value by operation and maintenance management personnel, and sending a control instruction to the transformer substation through the remote centralized control center or the cloud server.
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| CN114062598B (en) * | 2021-11-01 | 2024-06-04 | 一汽解放汽车有限公司 | Air treatment method, system, computer device and storage medium |
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| US9754966B1 (en) * | 2016-04-26 | 2017-09-05 | Nxp Usa, Inc. | Semiconductor on insulator (SOI) block with a guard ring |
| CN206672822U (en) * | 2017-06-28 | 2017-11-24 | 广州供电局有限公司 | Switch equal laminated structure and 250kV high-tension cable oscillation wave partial discharge test system |
| CN107635386B (en) * | 2017-08-08 | 2019-10-11 | 芜湖市凯鑫避雷器有限责任公司 | A kind of High-Voltage Electrical Appliances insulating mask arrangement |
| CN108183451A (en) * | 2017-12-29 | 2018-06-19 | 山东电工电气日立高压开关有限公司 | A kind of novel 1100kV GIS bus structures |
| CN108964277B (en) * | 2018-07-27 | 2019-05-10 | 盘锦广利达电气有限公司大庆分公司 | 35kV sledge fills automatically controlled integrated transformer substation |
| CN110287629B (en) * | 2019-07-01 | 2022-08-09 | 国网重庆市电力公司电力科学研究院 | Computer device, equipment and method for determining structural parameters of high-voltage basin-type insulator |
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