CN210041091U - Compact photovoltaic power generation system switch station - Google Patents
Compact photovoltaic power generation system switch station Download PDFInfo
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- CN210041091U CN210041091U CN201822130592.5U CN201822130592U CN210041091U CN 210041091 U CN210041091 U CN 210041091U CN 201822130592 U CN201822130592 U CN 201822130592U CN 210041091 U CN210041091 U CN 210041091U
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Abstract
The utility model provides a compact photovoltaic power generation system switch station, it includes: the cabin body and a plurality of switch devices arranged in the cabin body are connected through a bus connector; each switchgear includes a sealed metal container, and a plurality of individual elements connected together and disposed inside the metal container, and sulfur hexafluoride gas or nitrogen gas or a mixture of the sulfur hexafluoride gas and the nitrogen gas is filled inside the metal container as an insulating and arc extinguishing medium. The utility model discloses in, the medium voltage switch station of a plurality of gas-insulated metal enclosed switchgear integration for the compactness of prefabricated cabin form, light-duty, integration realizes real mill's prefabricated production debugging, has characteristics such as small, light in weight, transportation convenience, insulating properties are good, longe-lived, operation is reliable, maintenance and repair cycle length, and the equipment operation does not receive external environment to influence moreover, adaptable any environment.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field, concretely relates to compact photovoltaic power generation system switch station.
Background
A switchyard is an electric power facility that selectively connects or disconnects electric power systems (power grids) and consumers thereof through switchgear.
At present, medium-voltage switchyards mainly adopted in the photovoltaic field are divided into two forms of traditional architectural switchyards and assembled switchyards. Both forms of switchyard have the following disadvantages:
1) the traditional building type switch station needs to carry out civil construction, has long construction period and large occupied area, needs to carry out large-area plant area leveling, has high cost, and is easy to be limited by environments such as large gradient, narrow land parcel and the like;
2) the assembly type switch station needs to be assembled, wired and debugged on site, the construction period is long, and the installation quality is easily influenced by the environment and the construction quality;
3) both the two use the traditional switch equipment which takes air as an insulating medium, have the problems of larger volume (the width of the cabinet is generally not less than 1200mm, the volume is generally not less than 7m), heavier weight (generally not less than 2t), more metal plates, difficult operation, inconvenient transportation and the like, and have poor capability of bearing high humidity and high pollution and are greatly limited by severe environment;
4) both the two are easily limited and influenced by the common adverse conditions of high altitude, high humidity, sand wind and the like of photovoltaic projects, so that the equipment quality and the service life are reduced, and the maintenance and overhaul period is short.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve, at least in part, the technical problems occurring in the prior art.
Solve the utility model discloses the technical scheme that technical problem adopted is:
the utility model provides a compact photovoltaic power generation system switch station, it includes: the cabin body and a plurality of switch devices arranged in the cabin body are connected through bus connectors; each switch device comprises a sealed metal container and a plurality of independent elements which are arranged inside the metal container and are mutually connected, wherein sulfur hexafluoride gas or nitrogen gas or a mixed gas of the sulfur hexafluoride gas and the nitrogen gas is filled inside the metal container to be used as an insulating and arc extinguishing medium.
Optionally, the switchgear adopts one or more of a grounding transformer outgoing line cabinet, a bus PT cabinet, an SVG outgoing line cabinet, a photovoltaic outgoing line cabinet and a main transformer incoming line cabinet.
Optionally, the individual element employs one or more of a disconnector, an earthing switch, a circuit breaker, a voltage transformer, a current transformer, a lightning arrester and a live display device.
Optionally, the cabin body is of a double-layer integrated structure, and a heat insulation material is added into the interlayer.
Optionally, the switching station further includes a condensation control system disposed inside the cabin, the condensation control system including: the humidity sensors are dispersedly arranged in the cabin body; each humidity sensor is electrically connected with the humidity controller and is used for measuring the humidity in the cabin in real time and outputting the measurement result to the humidity controller; the humidity controller is internally preset with a humidity threshold value, is electrically connected with the air conditioning system, and is used for carrying out data processing on the received measurement results of all the humidity sensors to obtain a current humidity value, starting the dehumidification function of the air conditioning system when the current humidity value exceeds the upper limit of the humidity threshold value, and closing the dehumidification function of the air conditioning system when the current humidity value is lower than the lower limit of the humidity threshold value.
Optionally, the switchyard further comprises a temperature control system disposed inside the cabin, the temperature control system comprising: the temperature sensors are dispersedly arranged in the cabin body; each temperature sensor is electrically connected with the temperature controller and is used for measuring the temperature in the cabin in real time and outputting the measurement result to the temperature controller; the temperature controller is internally preset with a temperature threshold value, is electrically connected with the air conditioning system and is used for carrying out data processing on the received measurement results of all the temperature sensors to obtain a current temperature value, if the current temperature value obtained for the first time is lower than the lower limit of the temperature threshold value, the heating function of the air conditioning system is started, and when the subsequently obtained current temperature value exceeds the upper limit of the temperature threshold value, the heating function of the air conditioning system is closed, and when the subsequently obtained current temperature value is lower than the lower limit of the temperature threshold value, the heating function of the air conditioning system is started again; and if the current temperature value obtained for the first time is higher than the upper limit of the temperature threshold value, starting the refrigeration function of the air conditioning system, closing the refrigeration function of the air conditioning system when the current temperature value obtained for the subsequent time is lower than the lower limit of the temperature threshold value, and starting the refrigeration function of the air conditioning system again when the current temperature value obtained for the subsequent time is higher than the upper limit of the temperature threshold value.
Optionally, the switch station is still including setting up the inside pressure-fired fresh air system of cabin body, pressure-fired fresh air system includes: the micro-positive pressure air conditioner comprises a micro-positive pressure air conditioner body, an air supply pipeline and an air exhaust pipeline, wherein the micro-positive pressure air conditioner body is positioned on one side in the cabin body, the air supply pipeline is divided into an outer cabin body part and an inner cabin body part, an inlet of the outer cabin body part of the air supply pipeline is positioned outside the cabin body, an outlet of the outer cabin body part of the air supply pipeline is connected with the micro-positive pressure air conditioner body, an outlet of the inner cabin body part of the air supply pipeline is positioned in the cabin body, the air exhaust pipeline is also divided into an outer cabin body part and an inner cabin body part, an inlet of the outer cabin body part of the air exhaust pipeline is connected with the micro-positive pressure air conditioner body, an outlet of the; the micro-positive pressure air conditioner is used for filtering air sucked by the outer cabin part of the air supply pipeline and then sending the air into the inner cabin part of the air supply pipeline, discharging the air sucked by the inner cabin part of the air exhaust pipeline to the outer cabin part of the air exhaust pipeline, and always maintaining the air pressure in the inner cabin in a micro-positive pressure state in the air supply and exhaust process.
Optionally, the switching station further includes a sulfur hexafluoride gas alarm system and an automatic ventilation system, which are disposed inside the cabin, and the sulfur hexafluoride gas alarm system includes: the automatic ventilation system comprises at least one exhaust fan and a corresponding ventilation pipeline, wherein the inlet of the ventilation pipeline is connected with the corresponding exhaust fan, and the outlet of the ventilation pipeline extends out of the cabin body; the sulfur hexafluoride gas collector is electrically connected with the gas alarm controller and is used for collecting the concentration of sulfur hexafluoride gas in the cabin in real time and outputting the sulfur hexafluoride gas to the gas alarm controller; the oxygen collector is electrically connected with the gas alarm controller and is used for collecting the oxygen concentration in the cabin body in real time and outputting the oxygen concentration to the gas alarm controller; the gas alarm controller is respectively electrically connected with the gas alarm and the exhaust fans, a sulfur hexafluoride gas concentration safety threshold and an oxygen concentration safety threshold are preset in the gas alarm controller, and the gas alarm controller is used for starting the gas alarm and the exhaust fans when the sulfur hexafluoride gas concentration in the cabin body exceeds the safety threshold or the oxygen concentration in the cabin body is lower than the safety threshold.
Optionally, the switch station further comprises a fire alarm system and an automatic ventilation system, wherein the fire alarm system and the automatic ventilation system are arranged in the cabin, the fire alarm system comprises a plurality of temperature-sensitive detectors, a plurality of smoke-sensitive detectors, a fire alarm controller and a fire alarm, the temperature-sensitive detectors and the smoke-sensitive detectors are arranged in the cabin in a distributed manner, the automatic ventilation system comprises at least one exhaust fan and a corresponding ventilation pipeline, the inlet of the ventilation pipeline is connected with the corresponding exhaust fan, and the outlet of the ventilation pipeline extends out of the cabin; a temperature alarm threshold value is preset in the temperature-sensitive detector and is used for measuring the temperature in the cabin body in real time and outputting a temperature alarm signal to the fire alarm controller when the temperature measurement value exceeds the temperature alarm threshold value; a smoke concentration alarm threshold value is preset in the smoke detector and is used for measuring the smoke concentration in the cabin body in real time and outputting a smoke alarm signal to the fire alarm controller when the smoke concentration measured value exceeds the smoke concentration alarm threshold value; the fire alarm controller is respectively electrically connected with the fire alarm and the exhaust fans and used for analyzing the received temperature alarm signal and the received smoke alarm signal, starting the fire alarm when the analysis result accords with a preset alarm rule, and closing the exhaust fans and the air doors.
Optionally, the switching station still includes the setting and is in the inside video monitor system in cabin body, video monitor system includes a plurality of cameras, and it installs respectively around the internal and towards the positive position department of each switchgear of cabin, each video signal of camera output all inserts to being located the outside main control room video monitor system in cabin body.
Optionally, the switch station further comprises a conventional lighting system and an emergency lighting system, the conventional lighting system and the emergency lighting system are arranged inside the cabin, the conventional lighting system comprises a plurality of LED explosion-proof lighting lamps which are dispersedly arranged inside the cabin, and the emergency lighting system comprises a plurality of emergency lighting lamps which are dispersedly arranged inside the cabin and an uninterruptible power supply which is electrically connected with the emergency lighting lamps.
Has the advantages that:
the utility model discloses in, with a plurality of gas-insulated metal enclosed switchgear, specifically be at the inside switchgear that fills of sealed metal container has insulation and arc extinguishing medium, integrated compactness for prefabricated cabin form, it is light-duty, the middling pressure switchyard of integration, be convenient for popularize and apply at photovoltaic power plant, realize real factory prefabrication production debugging, small has, light in weight, transportation is convenient, insulating properties is good, long service life, the operation is reliable, characteristics such as maintenance cycle length, and equipment operation is not influenced by external environment, adaptable any environment, the expense that traditional building-type switchyard and assembled switchyard had has is high, area is big, the construction cycle length, need on-the-spot assembly and debugging, environment adaptability can be poor, the problem of aspects such as maintenance cycle length is short.
Drawings
Fig. 1 is a top sectional view of a medium voltage switchgear station of a compact photovoltaic power generation system provided by an embodiment of the present invention;
fig. 2 is a rear view of a medium voltage switchgear station of a compact photovoltaic power generation system provided by an embodiment of the present invention;
fig. 3 is a right sectional view of a medium voltage switchgear station in the compact photovoltaic power generation system provided by the embodiment of the present invention;
fig. 4 is a left side view of the medium voltage switchgear station of the compact photovoltaic power generation system provided by the embodiment of the present invention.
In the figure: 1-a temperature and humidity controller; 2-micro positive pressure air conditioning; 3-a gas alarm controller; 4-an exhaust fan; 5-fire alarm controller; 6A-temperature sensitive detector; 6B-a smoke detector; 7-emergency lighting lamp; 8-fire alarm; 9-a camera; 10-a cabin body; g1-grounding transformer outlet cabinet; g2-busbar PT cabinet; G3-SVG cabinet for outgoing lines; g4-first photovoltaic outlet cabinet; g5-a second photovoltaic outlet cabinet; G6-Main transformer inlet cabinet.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the present embodiment provides a medium voltage switchgear station of a compact photovoltaic power generation system, which includes: the cabin body 10 and a plurality of switch devices arranged inside the cabin body 10 are connected through bus connectors. Each switchgear includes a sealed metal container, and a plurality of individual elements connected together and disposed inside the metal container, and sulfur hexafluoride gas or nitrogen gas or a mixture of the sulfur hexafluoride gas and the nitrogen gas is filled inside the metal container as an insulating and arc extinguishing medium.
In the embodiment, a plurality of gas-insulated metal-enclosed switchgear, in particular to switchgear filled with insulating and arc-extinguishing media in a sealed metal container, is integrated into a compact, light and integrated medium-voltage switchgear station in a prefabricated cabin form, is convenient to popularize and apply in a photovoltaic power station, realizes real factory prefabricated production debugging, and has the characteristics of small volume, light weight, convenient transportation, good insulating property, long service life, reliable operation, long maintenance and repair period and the like.
The switch equipment can adopt one or more of a grounding transformer outgoing line cabinet, a bus PT cabinet (namely a bus voltage transformer cabinet), an SVG outgoing line cabinet (namely a static reactive compensation outgoing line cabinet), a photovoltaic outgoing line cabinet and a main transformer incoming line cabinet.
As shown in fig. 2, in the present embodiment, the switching device includes six switching devices, which are respectively a grounding transformer outgoing line cabinet G1, a bus PT cabinet G2, an SVG outgoing line cabinet G3, a first photovoltaic outgoing line cabinet G4, a second photovoltaic outgoing line cabinet G5, and a main transformer incoming line cabinet G6. However, the present invention is not limited thereto, and those skilled in the art can select fewer types of switchgear devices according to actual needs, and can select a specific number of each type of switchgear device.
The individual element may employ one or more of a disconnecting switch, an earthing switch, a circuit breaker, a voltage transformer, a current transformer, a lightning arrester, and a live display device.
Wherein, the isolating switch preferably adopts a three-position isolating switch; the circuit breaker is preferably a vacuum solid-sealed circuit breaker; the arrester is preferably a plug-in arrester.
The structure and operation of the various types of switchgear are described in detail below.
1) Grounding transformer outgoing line cabinet: because the main transformer 35kV side wiring is the triangle-shaped connection, so need provide an artificial neutral point through grounding transformer, the system of being convenient for adopts little resistance ground connection. The grounding transformer outlet cabinet has the function of leading out a wiring from a 35kV bus for connecting a grounding transformer. Three-station isolating switches, a vacuum solid-sealed circuit breaker and a current transformer are sequentially installed from the bus side to the grounding transformer side, and a lightning arrester and a live display device are installed at the lower port of the circuit breaker.
2) A bus PT cabinet: the bus PT cabinet is used for measuring bus voltage. The function of the bus PT cabinet is to provide a connection for installing PT on a 35kV bus. From the bus side to the PT side, three-station isolating switch and vacuum solid-sealed circuit breaker are sequentially installed, and a lightning arrester and a live display device are installed at the lower port of the circuit breaker.
3) SVG cabinet of being qualified for next round of competitions: SVG equipment is used for providing reactive compensation for the system, and the function of SVG outlet cabinet is to draw forth the wiring from the 35kV generating line and be used for connecting SVG equipment. Three-station disconnecting switches, vacuum solid-sealed circuit breakers and current transformers are sequentially installed from the bus side to the SVG equipment side, and lightning arresters and live display devices are installed at the lower ports of the circuit breakers.
4) Photovoltaic cabinet of being qualified for next round of competitions: the photovoltaic outlet cabinet provides the junction for photovoltaic current collection circuit is connected to the 35kV generating line. Three-station isolating switches, a vacuum solid-sealed circuit breaker, a voltage transformer and a current transformer are sequentially arranged from the bus side to the collecting line side, and a lightning arrester and a live display device are arranged at the lower port of the circuit breaker. The number of the photovoltaic outgoing line cabinets can be adjusted according to the number of actual current collecting circuits.
5) The main transformer inlet wire cabinet: the main transformer inlet cabinet has the function that a connection wire is led out from a 35kV bus to be connected with a main transformer. Three-station isolating switches, a vacuum solid-sealed circuit breaker and a current transformer are sequentially installed from the bus side to the main transformer side, and a lightning arrester and a live display device are installed at the lower port of the circuit breaker.
The cabin 10 may be a container type prefabricated cabin and may be made of a modular design. Specifically, the cabin body adopts a closed double-layer integrated structure, the interlayer is added with a heat insulation material, and the outer layer and the inner layer of the cabin body are preferably made of weather-resistant steel materials with an anti-corrosion function, so that the medium-voltage switch station is suitable for various environments and has the functions of shock resistance, water resistance, moisture resistance, rust resistance, dust resistance, water resistance, theft resistance, heat insulation and heat preservation.
Moreover, the cabin body is manufactured in a modularized mode, so that the cabin body is integrated, and the whole cabin body can be installed on a foundation through fixing bolts and can be disassembled, assembled and moved. The top of the cabin body is provided with a bevel angle with a certain angle, and the middle of the cabin body is high and the two sides of the cabin body are low, so that the cabin body has an automatic drainage function. The protection grade of the cabin body is not lower than IP43 grade, and the protection grade of the segmental splicing part of the cabin body is not lower than IP54 grade, so that the cabin body can resist wind and shock and is suitable for high-pollution environment.
In this embodiment, according to the design and operation characteristics of the photovoltaic power station, the medium-voltage switchgear is designed into each switchgear (also called as a switch air chamber) such as a main transformer incoming line cabinet, a photovoltaic outgoing line cabinet, an SVG outgoing line cabinet, a bus PT cabinet, and a grounding transformer outgoing line cabinet, and each switchgear is connected through a bus connector. Wherein each switchgear gas insulated metal enclosed structure is composed of a plurality of individual elements connected with each other, i.e. main elements such as disconnecting switch, earthing switch, circuit breaker, voltage transformer, current transformer, lightning arrester and live display device are enclosed in a sealed metal container, and SF is filled between the metal container and the metal container6Gas or nitrogen or the mixture of the two is used as an insulating and arc extinguishing medium.
Therefore, the medium-voltage switch cabinet is not influenced by external environmental condition changes, and can adapt to any environment, such as the operation in a place with a severe environment; using SF for switchgear6The gas or the nitrogen or the mixed gas of the gas and the nitrogen is used as an insulating and arc extinguishing medium, so that the insulating property of the equipment is improved, the insulating distance is reduced, the external dimension of the cabinet body is greatly reduced, and the cabinet has the characteristics of good insulating property, light weight, long service life, long maintenance and overhaul period and the like; the inside on-off switch adopts the non-maintaining vacuum circuit breaker of good performance, can reduce the work load of maintaining and overhauing greatly. Because the medium-voltage switch station adopts the gas-insulated metal enclosed switch equipment which is advanced compared with the traditional medium-voltage switch station, the structure is more compact, the volume is smaller, the floor area is greatly reduced, the floor area of a single switch equipment is only 1.2 cubic meters, and compared with the floor area of a single cabinet in an assembled switch station which is 3-4.2 cubic meters, the actual area of the whole switch station can be reduced to 1/2 of the assembled switch station adopted in the current photovoltaic power station or the traditional building switch station1/5, the land cost is greatly reduced.
Moreover, the medium-voltage switch station adopts a photovoltaic power station specialized design: the prefabricated production debugging in a factory is completely realized, the whole set is transported integrally, the transportation under various road condition and environment conditions is not influenced, the cabin body and equipment are not required to be assembled on site, the site construction installation and debugging engineering is omitted, the site civil engineering construction period is greatly shortened, the construction method is particularly suitable for the engineering characteristics of electric price rush and construction period overtime in the current photovoltaic industry, and the problems that the civil engineering of the photovoltaic power station cannot be constructed or high construction measure cost is required in winter in northern areas of China can be effectively solved.
In addition, the medium voltage switchgear station may further include various auxiliary systems disposed inside the cabin 10, such as: the system comprises a condensation control system, a temperature control system, a micro-positive pressure fresh air system, a sulfur hexafluoride gas alarm system, a fire alarm system, an automatic ventilation system, a video monitoring system, a conventional lighting system and an accident lighting system. Of course, the present invention is not limited to the types of the auxiliary systems disposed inside the cabin, and may be one or more of the aforementioned auxiliary systems, or may be other types of auxiliary systems, and may be specifically set by those skilled in the art according to actual needs.
The specific structure of the aforementioned auxiliary system is described in detail below with reference to fig. 1, 3, and 4, respectively.
The condensation control system includes: the humidity sensors are dispersedly arranged in the cabin body; each humidity sensor is electrically connected with the humidity controller and is used for measuring the humidity in the cabin in real time and outputting the measurement result to the humidity controller; the humidity controller is internally preset with a humidity threshold value which is electrically connected with the air conditioning system and used for carrying out data processing on the received measurement results of all the humidity sensors to obtain a current humidity value, closing a relay contact point thereof to start the dehumidification function of the air conditioning system when the current humidity value exceeds the upper limit of the humidity threshold value, and opening the relay contact point thereof to close the dehumidification function of the air conditioning system when the current humidity value is lower than the lower limit of the humidity threshold value.
The data processing of the received measurement results of all the humidity sensors refers to processing according to a preset processing rule, for example, averaging all the measurement results, the average value of all the measurement results is the current humidity value, or eliminating a plurality of measurement results that are too high and/or too low in advance, averaging the remaining measurement results, and the average value of the remaining measurement results is the current humidity value.
In this embodiment, the condensation control system makes the environmental humidity index in the cabin meet the working requirements of the switching station, and can effectively prevent condensation from being generated, so that the medium-voltage switching station can be suitable for various extreme humidity areas.
The temperature control system includes: the temperature sensors are dispersedly arranged in the cabin body; each temperature sensor is electrically connected with the temperature controller and is used for measuring the temperature in the cabin in real time and outputting the measurement result to the temperature controller; the temperature controller is internally preset with a temperature threshold which is electrically connected with the air conditioning system and used for carrying out data processing on the received measurement results of all the temperature sensors to obtain a current temperature value, if the current temperature value obtained for the first time is lower than the lower limit of the temperature threshold, the relay contact is closed to start the heating function of the air conditioning system, when the subsequently obtained current temperature value exceeds the upper limit of the temperature threshold, the relay contact is opened to close the heating function of the air conditioning system, and when the subsequently obtained current temperature value is lower than the lower limit of the temperature threshold, the relay contact is closed again to start the heating function of the air conditioning system; if the current temperature value obtained for the first time is higher than the upper limit of the temperature threshold value, the relay contact is closed to start the refrigeration function of the air conditioning system, when the current temperature value obtained for the subsequent time is lower than the lower limit of the temperature threshold value, the relay contact is opened to close the refrigeration function of the air conditioning system, and when the current temperature value obtained for the subsequent time is higher than the upper limit of the temperature threshold value, the relay contact is closed again to start the refrigeration function of the air conditioning system.
The data processing of the received measurement results of all the temperature sensors refers to processing according to a preset processing rule, for example, averaging all the measurement results, the average value of all the measurement results is the current temperature value, or eliminating a plurality of measurement results that are too high and/or too low in advance, and averaging the remaining measurement results, and the average value of the remaining measurement results is the current temperature value.
Therefore, the temperature control system has the temperature cold-warm bidirectional regulation function, realizes automatic temperature control, enables the temperature in the cabin body to meet the working requirement of the switching station, and enables the medium-voltage switching station to be suitable for working in various extreme temperature areas.
In this embodiment, the temperature and humidity controller 1 is used in which a temperature controller and a humidity controller are integrated. The temperature and humidity controller uses an advanced single chip as a control core, can simultaneously measure and control temperature signals and humidity signals, realizes liquid crystal digital display, and can also respectively set and display upper and lower limits of temperature and humidity thresholds through keys, so that the instrument can automatically start the functions of dehumidification, refrigeration and heating of an air conditioner according to the field situation, and automatically adjust the temperature and the humidity of the detected environment. Of course, the condensation control system and the temperature control system may share one set of air conditioning system.
Pressure-fired new trend system includes: pressure-fired air conditioner 2, air supply pipeline and exhaust duct, pressure-fired air conditioner 2 is located one side in the cabin body 10, air supply pipeline divide into cabin body outer part and cabin body internal part, and the entry of the cabin body outer part of air supply pipeline is located outside the cabin body 10, the export is connected with pressure-fired air conditioner 2, the entry of the cabin body internal part of air supply pipeline is connected with pressure-fired air conditioner 2, the export is located cabin body 10, exhaust duct also divide into cabin body outer part and cabin body internal part, and the entry of the cabin body outer part of exhaust duct is connected with pressure-fired air conditioner 2, the export is located outside the cabin body 10, the entry of the cabin body internal part of exhaust duct is located cabin body 10, the. The micro-positive pressure air conditioner 2 is used for filtering air sucked by the outer part of the cabin body of the air supply pipeline, then sending the air into the interior of the cabin body through the inner part of the cabin body of the air supply pipeline, discharging the air sucked by the inner part of the cabin body of the air exhaust pipeline to the exterior of the cabin body through the outer part of the cabin body of the air exhaust pipeline, and always maintaining the air pressure in the cabin body in a micro-positive pressure state in the air supply and exhaust process.
In this embodiment, the micro positive pressure state means that the difference between the air pressure inside the cabin and the standard atmospheric pressure is 10Pa to 100 Pa. The micro-positive pressure fresh air system is combined with the condensation control system and the temperature control system, so that the automatic temperature and humidity adjusting function in the cabin body is realized, the cabin body is ensured to be in a micro-positive pressure state, and floating dust and the like in the outside air are prevented from entering the cabin body.
The purification principle of the micro-positive pressure fresh air system is as follows: under the action of the fan, outdoor air is continuously sucked into the fresh air system, is filtered by various filter screens, harmful substances in outdoor air are removed, clean air is discharged indoors, the indoor pressure is slightly higher than that outdoors, and indoor dirty air is discharged outdoors through the exhaust pipeline, so that the indoor air quality is improved.
The "micro-positive pressure" has two notions in concept, first, the "positive pressure" means that the indoor air pressure is higher than the outdoor air pressure; the next is "micro", which is a relative value, meaning that the difference between the indoor air pressure and the standard atmospheric pressure (101 kpa) (also called the positive pressure value) is "micro".
Generally, the positive pressure generated by the micro-positive pressure fresh air system is between ten and several dozen pascals, and even exceeds one hundred pascals in some cases. The positive pressure value is related to the air output of the fresh air system and the indoor sealing condition. Generally, the positive pressure value is proportional to the square of the air output and the higher the sealing performance, the larger the positive pressure.
The automatic ventilation system (also called as axial flow fan smoke exhaust system) comprises at least one exhaust fan 4 and a corresponding ventilation pipeline, wherein the inlet of the ventilation pipeline is connected with the corresponding exhaust fan 4, and the outlet of the ventilation pipeline extends out of the cabin 10.
In this embodiment, the automatic ventilation system may include two exhaust fans respectively installed in the upper space and the lower space of the cabin body, so as to realize the functions of current conversion and smoke exhaust between the cabin body and the outside air and maintain the stable environment in the cabin.
The sulfur hexafluoride gas alarm system comprises: a sulfur hexafluoride gas collector, an oxygen collector, a gas alarm controller 3 and a gas alarm. The sulfur hexafluoride gas collector is electrically connected with the gas alarm controller 3 and is used for collecting the concentration of sulfur hexafluoride gas in the cabin in real time and outputting the sulfur hexafluoride gas to the gas alarm controller 3. The oxygen collector is electrically connected with the gas alarm controller 3 and is used for collecting the oxygen concentration in the cabin body in real time and outputting the oxygen concentration to the gas alarm controller 3. The gas alarm controller 3 is electrically connected with the gas alarm and the exhaust fans 4 respectively, and is preset with a sulfur hexafluoride gas concentration safety threshold and an oxygen concentration safety threshold, and is used for starting the gas alarm and the exhaust fans 4 when the sulfur hexafluoride gas concentration inside the cabin body exceeds the safety threshold (namely the sulfur hexafluoride gas content exceeds the standard) or the oxygen concentration inside the cabin body is lower than the safety threshold (namely oxygen deficiency).
In this embodiment, the sulfur hexafluoride gas alarm system may monitor the concentration of sulfur hexafluoride gas and the concentration of oxygen in the cabin in real time, alarm when the content of sulfur hexafluoride gas exceeds the standard or is deficient in oxygen, and start the exhaust fan for ventilation at the same time, so as to prevent the sulfur hexafluoride gas from leaking and endangering the safety of workers entering the cabin.
The fire alarm system comprises a plurality of temperature-sensitive detectors 6A, a plurality of smoke-sensitive detectors 6B, a fire alarm controller 5 and a fire alarm 8, wherein the plurality of temperature-sensitive detectors 6A and the plurality of smoke-sensitive detectors 6B are arranged in the cabin body in a dispersed manner. A temperature alarm threshold is preset in the temperature-sensitive detector 6A and is used for measuring the temperature inside the cabin in real time and outputting a temperature alarm signal to the fire alarm controller 5 when the temperature measurement value exceeds the temperature alarm threshold. A smoke concentration alarm threshold value is preset in the smoke detector 6B and is used for measuring the smoke concentration in the cabin body in real time and outputting a smoke alarm signal to the fire alarm controller 5 when the smoke concentration measurement value exceeds the smoke concentration alarm threshold value. The fire alarm controller 5 is electrically connected with the fire alarm 8 and each exhaust fan 4 respectively, and is used for analyzing the received temperature alarm signal and the received smoke alarm signal, starting the fire alarm 8 when the analysis result accords with the preset alarm rule, and closing each exhaust fan 4 and the air door simultaneously. The preset alarm rules can be set by those skilled in the art according to actual conditions, for example, the fire alarm is started when the temperature alarm signal and the smoke alarm signal are received simultaneously, or the fire alarm is started when the temperature alarm signal or the smoke alarm signal is received separately.
In this embodiment, the fire alarm system is linked with the automatic ventilation system, and can automatically alarm and shut down the exhaust fan when a fire breaks out. The fire alarm controller can also be connected with a fire alarm system of a main control room positioned outside the cabin body.
The video monitoring system comprises a plurality of cameras 9 which are respectively arranged on the periphery in the cabin and at positions facing the front of each switching device, and video signals output by the cameras 9 are all connected to a main control room video monitoring system positioned outside the cabin so as to realize remote monitoring of the switching station.
The conventional lighting system comprises a plurality of LED explosion-proof lighting lamps which are dispersedly arranged in the cabin, and the emergency lighting system comprises a plurality of emergency lighting lamps 7 dispersedly arranged in the cabin and an uninterrupted power supply electrically connected with the emergency lighting lamps, so that the lighting requirements under normal and accident working conditions are met.
The auxiliary systems can complete related installation, wiring and debugging work in a factory, are integrally designed, realize high integration of electrical equipment and transport the electrical equipment to the site as a whole, and reduce the site workload and the construction period to the maximum extent.
This embodiment medium voltage switch station outer layer is according to the photovoltaic power plant characteristic, the design is the prefabricated cabin of confined container formula, the cabin body adopts steel sheet and insulation material to make, the cabin body is inside in advance at auxiliary system such as integrated installation heating ventilation of mill, the illumination, the fire control, security protection, combine photovoltaic project high altitude, many wind sand, extremely cold extremely hot, environmental characteristics such as, can make switch station adaptation different areas photovoltaic power plant environmental aspect, especially adapt to various abominable operational environment, satisfy switch station operation requirement, the commonality is strong, realize unmanned on duty in the true sense, non-maintaining or few maintenance.
To sum up, the utility model provides a compact photovoltaic power generation system switch station has following advantage:
1) the gas insulated metal closed switch device is adopted, the operation is reliable, and the safety is high.
Adopts advanced gas-insulated metal-enclosed switch technology, and the switch equipment is filled with SF6The gas or the nitrogen or the mixed gas of the gas and the nitrogen is used as an insulating and arc extinguishing medium, the insulating property and the arc extinguishing capability are better than those of the traditional air switch, the operation safety and the reliability of a power station can be improved, the service life of the equipment is longer, and the maintenance and overhaul period is also greatly prolonged.
2) The gas insulated switch integrated switch station has small volume and light weight.
The gas insulated switchgear is integrated into a whole, the volume is smaller, the weight is lighter, the occupied area is only 1/2 of an assembled switch station, 1/5 of a fire disaster traditional building type switch station greatly reduces the land cost, and the adaptability to narrow and gradient conditions of mountain photovoltaic project plots is strong.
3) Completely realizes factory pre-assembly production and debugging, and greatly shortens the construction period.
The medium-voltage switch station is completely produced, installed and debugged in a factory, the whole switch station is transported to a photovoltaic project site as a whole, transportation is not influenced under various road condition and environment conditions, the process of installing and debugging field equipment is omitted, the quality of equipment installation and debugging is improved, the construction period is greatly shortened, the medium-voltage switch station is particularly suitable for the engineering characteristics of sudden attack of the current photovoltaic industry, electricity price rush and construction period overtime, and the problems that the civil engineering of the photovoltaic power station cannot be constructed or high construction measure cost is required in winter in northern areas of China can be effectively solved.
4) The integrated switch station can adapt to various severe environments.
The medium-voltage switch station switch adopts a gas-insulated metal sealing technology, the cabin body is completely sealed, a temperature and humidity control system is configured, micro-positive pressure in the cabin is kept, the operation is not influenced by the external environment, the medium-voltage switch station switch is suitable for severe environments such as special wind sand, high altitude and high humidity of a photovoltaic power station, and the specific special design is not needed.
5) A plurality of auxiliary systems are integrated in the cabin body, so that maintenance-free and unattended operation are realized.
Auxiliary systems such as heating ventilation, illumination, fire control, security protection are installed in the cabin body in an integrated mode in a factory, the environment required by the operation of the switch station is guaranteed, the maintenance period is shortened, and the switch station is intelligent and unattended.
6) The construction cost is low
Compared with the traditional building type switch station and the common assembly type switch station, the medium-voltage switch station comprehensively considers equipment, construction safety and land cost, and has obvious advantage in price.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (11)
1. A compact photovoltaic power generation system switchyard, characterized by comprising: the cabin body and a plurality of switch devices arranged in the cabin body are connected through bus connectors; each switch device comprises a sealed metal container and a plurality of independent elements which are arranged inside the metal container and are mutually connected, wherein sulfur hexafluoride gas or nitrogen gas or a mixed gas of the sulfur hexafluoride gas and the nitrogen gas is filled inside the metal container to be used as an insulating and arc extinguishing medium.
2. The switchyard according to claim 1, characterized in that said switchgear employs one or more of an earthing transformer outlet cabinet, a busbar PT cabinet, an SVG outlet cabinet, a photovoltaic outlet cabinet and a main transformer inlet cabinet.
3. A switchyard according to claim 1, characterized in that the individual elements employ one or more of disconnectors, earthing switches, circuit breakers, voltage transformers, current transformers, lightning arresters and live display devices.
4. The switchyard according to claim 1, characterized in that the cabin is a double-layer integrated structure with heat insulation material added in the interlayer.
5. The switchyard according to any of claims 1-4, further comprising a condensation control system disposed inside the enclosure, the condensation control system comprising: the humidity sensors are dispersedly arranged in the cabin body; each humidity sensor is electrically connected with the humidity controller and is used for measuring the humidity in the cabin in real time and outputting the measurement result to the humidity controller; the humidity controller is internally preset with a humidity threshold value, is electrically connected with the air conditioning system, and is used for carrying out data processing on the received measurement results of all the humidity sensors to obtain a current humidity value, starting the dehumidification function of the air conditioning system when the current humidity value exceeds the upper limit of the humidity threshold value, and closing the dehumidification function of the air conditioning system when the current humidity value is lower than the lower limit of the humidity threshold value.
6. The switchyard according to any of claims 1-4, characterized in that the switchyard further comprises a temperature control system arranged inside the enclosure, the temperature control system comprising: the temperature sensors are dispersedly arranged in the cabin body; each temperature sensor is electrically connected with the temperature controller and is used for measuring the temperature in the cabin in real time and outputting the measurement result to the temperature controller; the temperature controller is internally preset with a temperature threshold which is electrically connected with the air conditioning system and used for carrying out data processing on the received measurement results of all the temperature sensors to obtain a current temperature value, and controlling the relay contact in the temperature controller to be closed to start the heating/cooling function of the air conditioning system or controlling the relay contact in the temperature controller to be opened to close the heating/cooling function of the air conditioning system according to the comparison result of the current temperature value and the temperature threshold.
7. The switchyard according to any of claims 1-4, further comprising a micro-positive pressure fresh air system disposed inside the enclosure, the micro-positive pressure fresh air system comprising: the micro-positive pressure air conditioner comprises a micro-positive pressure air conditioner body, an air supply pipeline and an air exhaust pipeline, wherein the micro-positive pressure air conditioner body is positioned on one side in the cabin body, the air supply pipeline is divided into an outer cabin body part and an inner cabin body part, an inlet of the outer cabin body part of the air supply pipeline is positioned outside the cabin body, an outlet of the outer cabin body part of the air supply pipeline is connected with the micro-positive pressure air conditioner body, an outlet of the inner cabin body part of the air supply pipeline is positioned in the cabin body, the air exhaust pipeline is also divided into an outer cabin body part and an inner cabin body part, an inlet of the outer cabin body part of the air exhaust pipeline is connected with the micro-positive pressure air conditioner body, an outlet of the; the micro-positive pressure air conditioner is used for filtering air sucked by the outer cabin part of the air supply pipeline and then sending the air into the inner cabin part of the air supply pipeline, discharging the air sucked by the inner cabin part of the air exhaust pipeline to the outer cabin part of the air exhaust pipeline, and always maintaining the air pressure in the inner cabin in a micro-positive pressure state in the air supply and exhaust process.
8. The switchyard according to any of claims 1 to 4, further comprising a sulfur hexafluoride gas alarm system and an automatic ventilation system arranged inside the enclosure, the sulfur hexafluoride gas alarm system comprising: the automatic ventilation system comprises at least one exhaust fan and a corresponding ventilation pipeline, wherein the inlet of the ventilation pipeline is connected with the corresponding exhaust fan, and the outlet of the ventilation pipeline extends out of the cabin body; the sulfur hexafluoride gas collector is electrically connected with the gas alarm controller and is used for collecting the concentration of sulfur hexafluoride gas in the cabin in real time and outputting the sulfur hexafluoride gas to the gas alarm controller; the oxygen collector is electrically connected with the gas alarm controller and is used for collecting the oxygen concentration in the cabin body in real time and outputting the oxygen concentration to the gas alarm controller; the gas alarm controller is respectively electrically connected with the gas alarm and the exhaust fans, a sulfur hexafluoride gas concentration safety threshold and an oxygen concentration safety threshold are preset in the gas alarm controller, and the gas alarm controller is used for starting the gas alarm and the exhaust fans when the sulfur hexafluoride gas concentration in the cabin body exceeds the safety threshold or the oxygen concentration in the cabin body is lower than the safety threshold.
9. The switching station according to any one of claims 1 to 4, characterized in that the switching station further comprises a fire alarm system and an automatic ventilation system which are arranged inside the cabin, wherein the fire alarm system comprises a plurality of temperature-sensitive detectors, a plurality of smoke-sensitive detectors, a fire alarm controller and a fire alarm, the plurality of temperature-sensitive detectors and the plurality of smoke-sensitive detectors are respectively arranged inside the cabin in a distributed manner, the automatic ventilation system comprises at least one exhaust fan and a corresponding ventilation duct, the inlet of the ventilation duct is connected with the corresponding exhaust fan, and the outlet of the ventilation duct extends out of the cabin; a temperature alarm threshold value is preset in the temperature-sensitive detector and is used for measuring the temperature in the cabin body in real time and outputting a temperature alarm signal to the fire alarm controller when the temperature measurement value exceeds the temperature alarm threshold value; a smoke concentration alarm threshold value is preset in the smoke detector and is used for measuring the smoke concentration in the cabin body in real time and outputting a smoke alarm signal to the fire alarm controller when the smoke concentration measured value exceeds the smoke concentration alarm threshold value; the fire alarm controller is respectively electrically connected with the fire alarm and the exhaust fans and used for analyzing the received temperature alarm signal and the received smoke alarm signal, starting the fire alarm when the analysis result accords with a preset alarm rule, and closing the exhaust fans and the air doors.
10. The switchyard according to any of claims 1-4, further comprising a video monitoring system disposed inside the cabin, wherein the video monitoring system comprises a plurality of cameras respectively installed at the positions around the cabin and facing the front of each switching device, and video signals output by each camera are connected to a main control room video monitoring system located outside the cabin.
11. The switchyard according to any of claims 1-4, further comprising a conventional lighting system and an emergency lighting system disposed inside the enclosure, the conventional lighting system comprising a plurality of LED explosion-proof lights dispersed inside the enclosure, and the emergency lighting system comprising a plurality of emergency lights dispersed inside the enclosure and an uninterruptible power supply electrically connected thereto.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117294021A (en) * | 2023-11-22 | 2023-12-26 | 华能吉林发电有限公司 | Monitoring device based on electric power big data |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117294021A (en) * | 2023-11-22 | 2023-12-26 | 华能吉林发电有限公司 | Monitoring device based on electric power big data |
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