CN219304181U - New energy box-type transformer station - Google Patents

Abstract

The utility model discloses a new energy box-type transformer station, which comprises: the box-to-bottom bracket is provided with a box-to-high voltage inlet wire interval, a box-to-high voltage operation interval and a box-to-low voltage interval; the box transformer high-voltage incoming line interval is internally provided with a charged indicator, a high-voltage isolating switch, a high-voltage lightning arrester and a high-voltage sleeve; a transformer oil tank and a self-powered transformer are arranged in the tank-to-high voltage operation interval, and a transformer radiator is arranged on one side of the transformer oil tank; a transformer low-voltage outlet sleeve is arranged in the box low-voltage interval; the high-voltage inlet space of the box transformer is completely isolated from the high-voltage operation space of the box transformer and the low-voltage space of the box transformer; the high-voltage isolating switch adopts a three-station isolating switch, so that a visible fracture can be formed, the power failure maintenance safety of a single box transformer substation can be ensured, and the normal work of other box transformers in a power supply circuit can not be influenced.

Description

New energy box-type transformer station

Technical Field

The utility model relates to the technical field of transformer stations, in particular to a new energy box-type transformer station.

Background

The clean renewable energy source has become the prop force of the energy industry due to the advantages of large reserve and no pollution, is strategic choice for optimizing the energy structure, protecting the ecological environment and promoting the sustainable development, and therefore, diversified demands are put forward for new energy box-type transformer stations. The wind power box type transformer station is used for wind power generation, 690V electric energy generated by a wind generating set is converted into 35kV electric energy, and the functions of boosting and grid connection are achieved. The photovoltaic box-type transformer station is applied to a solar grid-connected power generation system. The solar cell panel converts solar energy into electric energy through receiving solar energy, the electric energy enters a solar inversion station after being collected, the electric energy is converted into grid-connected low-voltage electric energy through a grid-connected inverter, and the electric energy is converted into 35kV electric energy through photovoltaic and is integrated into a power grid. Due to the continuous widening of the technical field, the existing new energy box-type transformer station is further expanded to the fields of wind-light integration projects, fishing light integration projects and the like.

The new energy box-type transformer station currently mainly has three types: american new energy box-type transformer station: the device is formed by combining a step-up transformer, a station transformer, a high-voltage load switch fuse set, a low-voltage circuit breaker, a lightning arrester and other protection measuring equipment. European style new energy box-type transformer station: the inside of the box-type transformer station is composed of a high-voltage chamber, a transformer chamber and a low-voltage chamber which are independent, and the transformer chamber and the low-voltage chamber are distributed in a shape of a Chinese character 'mu', and the high-voltage part is selected from a scheme of vacuum load switch and fuse protector/vacuum circuit breaker. The new energy box type transformer station of the Hua style: the box-type transformer station high-voltage chamber, transformer and low-voltage cabinet part select article font overall arrangement, and the transformer radiator exposes in the atmosphere, and high-voltage part switch selection is with European style new forms of energy box-type transformer station, and structural layout is similar with American box-type transformer station, belongs to the combination type box-type transformer station of two. The American type new energy box-type transformer station is characterized in that a high-voltage load switch, a high-voltage fuse and a transformer are all arranged in an oil tank, the overall external dimension is smaller than that of an European type transformer station, the cost advantage is larger, and the maintenance is easy. The European-style new energy box-type transformer station and the Hua-style box-type transformer station are provided with vacuum load switches/breakers at high voltage, and meanwhile, the incoming wires are provided with isolating switches, so that safe outage overhaul at the high voltage side can be realized, and the performance is reliable.

However, the new energy box-type transformer station has the following disadvantages: the high-voltage side of the American new energy box type transformer station has no independent visible fracture when the single box type transformer station is subjected to power failure maintenance, and the normal power generation function of other fans in a line is easily influenced for ensuring safety during maintenance. The European new energy box-type transformer station and the Hua-type transformer station have larger overall dimension and higher cost of single product; the site occupation space is larger, and the site construction cost is higher compared with the site construction cost.

Disclosure of Invention

The utility model aims to provide a new energy box-type transformer station, which aims to solve the problems that the high-voltage side of the existing new energy box-type transformer station has no independent visible fracture, and the normal power generation function of other fans in a line is easily affected in order to ensure safety during maintenance.

The utility model provides a new energy box-type transformer station, which comprises: the box transformer bottom bracket is provided with a box transformer high-voltage inlet wire interval, a box transformer high-voltage operation interval and a box transformer low-voltage interval; the box transformer high-voltage incoming line interval is internally provided with a charged indicator, a high-voltage isolating switch, a high-voltage lightning arrester and a high-voltage sleeve; a transformer oil tank and a self-powered transformer are arranged in the tank-to-high voltage operation interval, and a transformer radiator is arranged on one side of the transformer oil tank; a transformer low-voltage outlet sleeve is arranged in the box low-voltage interval; the box-type transformer high-voltage inlet space is completely isolated from the box-type transformer high-voltage operation space and the box-type transformer low-voltage space; the high-voltage isolating switch adopts a three-station isolating switch, and can form a visible fracture.

Further, the box transformer high-voltage wire inlet space is provided with a high-voltage cable wire inlet hole, the box transformer low-voltage wire inlet space is provided with a low-voltage side cable wire inlet hole, and a high-voltage cable enters from the high-voltage cable wire inlet hole.

Further, a manhole, a functional centralized screen assembly and an inductive LED lighting device in the box transformer are arranged in the box transformer low-voltage interval.

Further, the box transformer high-pressure inlet space is provided with a patrol robot, a temperature-sensing self-starting fire extinguishing device and a smoke sensing device.

Furthermore, the high-voltage lightning arrester adopts a gapless metal zinc oxide lightning arrester and is provided with an on-line monitoring device.

Further, an active electromagnetic lock is additionally arranged at the high-pressure room door of the high-pressure inlet space of the box transformer, and an anti-rust and anti-theft mechanical lock is additionally arranged at the outer door.

Further, a high-voltage load switch, an off-circuit tap-changer, a pressure release valve, an oil temperature gauge, an oil level gauge, a pressure gauge and an oil drain valve are arranged in the box transformer high-voltage operation interval.

Further, a high-voltage fuse is arranged in the transformer oil tank.

Further, the arrangement of the high-voltage fuses is staggered with the operation space of the high-voltage load switch.

Further, the transformer radiator is provided with a protective cover.

The beneficial effects of the utility model are as follows: the utility model provides a new energy box-type transformer station, which comprises: the box-to-bottom bracket is provided with a box-to-high voltage inlet wire interval, a box-to-high voltage operation interval and a box-to-low voltage interval; the box transformer high-voltage incoming line interval is internally provided with a charged indicator, a high-voltage isolating switch, a high-voltage lightning arrester and a high-voltage sleeve; a transformer oil tank and a self-powered transformer are arranged in the tank-to-high voltage operation interval, and a transformer radiator is arranged on one side of the transformer oil tank; a transformer low-voltage outlet sleeve is arranged in the box low-voltage interval; the high-voltage inlet space of the box transformer is completely isolated from the high-voltage operation space of the box transformer and the low-voltage space of the box transformer; the high-voltage isolating switch adopts a three-station isolating switch, so that a visible fracture can be formed, the power failure maintenance safety of a single box transformer substation can be ensured, and the normal work of other box transformers in a power supply circuit can not be influenced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a new energy box-type transformer station provided by the utility model;

FIG. 2 is a left side view of the new energy box-type transformer station provided by the utility model;

FIG. 3 is a top view of the new energy box-type transformer station provided by the utility model;

fig. 4 is a front view of a high-voltage isolating switch of the new energy box-type transformer station provided by the utility model;

FIG. 5 is a top view of the high voltage isolating switch of the new energy box-type transformer station provided by the utility model;

FIG. 6 is a left side view of the high voltage isolating switch of the new energy box type transformer station provided by the utility model;

fig. 7 is an electrical scheme of the new energy box-type transformer station provided by the utility model.

Illustration of: 1-a charge indicator; 2-high voltage isolating switch; 3-a high voltage arrester; 4-high voltage bushing; 5-high voltage cable; 6-a high-voltage cable inlet hole; 7-a box-type transformer substation warning board; 8, a nameplate of a box-type variable product; 9-a box transformer bottom bracket; 10-box transformer high-voltage incoming line intervals; 11-tank change high-pressure operation interval; 12-a transformer oil tank; 13-a transformer radiator; 14-tank low pressure interval; 15-a self-powered transformer; 16-transformer low voltage outlet bushing; 17-a low-voltage side cable inlet hole; 18-a manhole in the box transformer; 19-function type centralized screen assembly; 20-a patrol robot; 21-a temperature-sensing self-starting fire extinguishing device; 22-an induction LED lighting device; 23-smoke sensor.

Detailed Description

Referring to fig. 1 to 7, an embodiment of the present utility model provides a new energy box-type transformer station, including: the intelligent transformer comprises a charge indicator 1, a high-voltage isolating switch 2, a high-voltage lightning arrester 3, a high-voltage sleeve 4, a high-voltage cable 5, a high-voltage cable inlet hole 6, a box transformer warning board 7, a box transformer product nameplate 8, a box transformer bottom bracket 9, a box transformer high-voltage inlet wire interval 10, a box transformer high-voltage operation interval 11, a transformer oil tank 12, a transformer radiator 13, a box transformer low-voltage interval 14, a self-powered transformer 15, a transformer low-voltage outlet sleeve 16, a low-voltage side cable inlet hole 17, a box transformer inner manhole 18, a functional centralized screen 19, a patrol robot 20, a temperature sensing self-starting fire extinguishing device 21, an induction type LED lighting device 22 and a smoke sensing device 23.

The box transformer bottom bracket 9 is provided with a box transformer high-voltage incoming line interval 10, a box transformer high-voltage operation interval 11 and a box transformer low-voltage interval 14; the charging indicator 1, the high-voltage isolating switch 2, the high-voltage lightning arrester 3 and the high-voltage sleeve 4 are arranged in the box transformer high-voltage wire inlet space 10; a transformer oil tank 12 and a self-powered transformer 15 are arranged in the tank transformer high-voltage operation interval 11, and a transformer radiator 13 is arranged on one side of the transformer oil tank 12; a transformer low voltage outlet bushing 16 is arranged in the tank low voltage space 14; the box-section high-voltage inlet space 10 is completely isolated from the box-section high-voltage operation space 11 and the box-section low-voltage space 14; the high-voltage isolating switch 2 adopts a three-station isolating switch, and can form a visible fracture.

The box transformer high-voltage wire inlet space 10 is provided with a high-voltage cable wire inlet hole 6, the box transformer low-voltage space 14 is provided with a low-voltage side cable wire inlet hole 17, and the high-voltage cable 5 enters from the high-voltage cable wire inlet hole 6. Inside the box transformer substation low-voltage interval 14 are arranged a box transformer substation manhole 18, a functional centralized panel 19 and an induction type LED lighting device 22.

The box transformer high-voltage incoming line interval 10 is provided with a patrol robot 20, a temperature-sensing self-starting fire extinguishing device 21 and a smoke sensing device 23. The high-voltage lightning arrester 3 adopts a gapless metal zinc oxide lightning arrester and is provided with an on-line monitoring device. The box transformer high-voltage inlet space is provided with an active electromagnetic lock at a 10 high-voltage chamber door, and an anti-rust and anti-theft mechanical lock is arranged at an outer door. The high-voltage load switch, the non-excitation tapping switch, the pressure release valve, the oil temperature gauge, the oil level gauge, the pressure gauge and the oil drain valve are arranged in the box transformer high-voltage operation interval 11. A high voltage fuse is provided in the transformer tank 12. The arrangement of the high-voltage fuses is staggered with the operation space of the high-voltage load switch. The transformer radiator 13 is provided with a protective cover.

The specific electrical components of the new energy box-type transformer station are configured as follows:

and (3) transformer configuration: the transformer is a 35kV oil immersed amorphous alloy power transformer (three-phase, double-winding, no-load voltage regulation, self-cooling and low loss). The amorphous alloy iron core is selected, and the energy-saving and environment-friendly performances are superior to those of other types of transformers with the same specification. The short-circuit resistance of the transformer meets the standard requirement of the existing 35KV power transformer. The coil material adopts copper conductor. In the aspect of environmental protection, when the amorphous alloy iron core is used for an oil immersed transformer, harmful gases such as CO, SO, NO and the like can be effectively reduced, and the degree of pollution to the atmosphere is reduced. In terms of energy saving, since the amorphous alloy material has superior magnetic permeability, it is easier to magnetize or demagnetize with little energy consumption. The no-load loss of the amorphous alloy transformer is far lower than that of the traditional transformer, and the energy-saving effect is obvious. The transformer is provided with a thermometer to monitor the upper layer oil temperature of the transformer; an oil level indicating device is arranged to detect the oil level state of the transformer. Considering the factors of theft prevention and mechanical damage prevention and facilitating maintenance operation in operation, an oil drain valve and an oil sampling device are arranged outside the box body. The transformer is provided with a protection device for heavy gas, light gas, oil level, pressure, oil temperature and the like, can output a heavy gas signal, a light gas signal, an oil level low-level number and a pressure release signal, and is connected with a protection measurement and control device of the transformer by a 4 mA-20 mA oil temperature signal.

High-voltage configuration selection: the high-voltage side adopts a high-voltage isolating switch and wall bushing incoming line connection mode. And an isolating switch, a high-voltage wall bushing, a metal zinc oxide lightning arrester, an electrified display and the like are arranged in the high-voltage side incoming line interval and are completely isolated from the high-voltage operation interval and the low-voltage interval, so that the personal safety of operators is ensured. The high-voltage isolating switch selects a three-station isolating switch (an electric operating mechanism is configured to realize electric operation), a visible fracture can be formed, the power failure maintenance safety of a single box transformer substation can be ensured, and the normal work of other box transformers in a power supply circuit can not be influenced.

Table 1 isolating switch parameters

The high-voltage lightning arrester adopts a gapless metal zinc oxide lightning arrester and is provided with an on-line monitoring device (leakage current and action recorder). The installation position of the lightning arrester on-line monitoring device is easy to observe, and the full current detection test under the later operation voltage is easy to complete. The high-voltage lightning arrester is arranged and has enough safe distance with the center of the access cable penetration hole, so that the high-voltage potential point of the high-voltage lightning arrester is prevented from discharging to the low-potential part of the cable or the cable terminal. The high-voltage chamber door is additionally provided with an active electromagnetic lock and a charged display, and when the high-voltage side is charged, the high-voltage chamber door cannot be opened; if the high-pressure chamber door is opened in an electrified way, the alarm function is realized, and the five-prevention linkage is realized. The outer door of the box body is additionally provided with an antirust and anti-theft mechanical lock. The high-voltage operation interval is internally provided with a high-voltage load switch, an off-circuit tap-changer, a pressure release valve, an oil temperature gauge, an oil level gauge, a pressure gauge, an oil drain valve and the like. The transformer and the high-voltage component are arranged in a box body, and the structure is compact. The three-phase load switch is adopted to configure the electric operating mechanism, so that the on-site/remote operation can be realized. The high-voltage fuse adopts a special high-voltage current-limiting full-range plug-in fuse for combined type box transformer protection, is arranged in an oil tank, does not need to be perforated on the side wall of the oil tank, and has no hidden trouble of oil leakage and oil leakage. The radiator of the transformer is exposed outside the box transformer, natural wind heat dissipation can be realized, and the radiator is provided with a protective cover, so that the jolt of equipment transportation paths and the safety of the site can be effectively ensured, and the heat dissipation performance is not influenced. The upper and lower outgoing lines at the high-voltage side of the box body need to have oil leakage prevention measures. The accident oil drain valve box body is arranged outside. The 35KV fuse on the high-voltage side of the box-type transformer is used for overcurrent and short-circuit protection of the transformer. And after the single-phase fuse is fused, the linkage is tripped out of the low-voltage side frame circuit breaker. The load switch position signal, the fuse action signal, the high-voltage cabinet control power supply disappearance signal and the like are additionally provided with 1 pair of normally open passive contacts, and are distributed to the secondary terminal strip of the box transformer substation for the intelligent measurement and control unit of the box transformer substation. The arrangement of the high-voltage fuses is staggered with the operation space of the load switch, so that the damage to operators caused by accidental explosion and flying of the fuses when the operators operate the load switch is prevented.

Low-voltage configuration type selection: the low-voltage interval is internally provided with a low-voltage outlet sleeve, a low-voltage protection element, a voltage and current measuring device and the like. The enough space is reserved in the low-voltage cable chamber, the installation wiring and the overhaul test of the low-voltage power cable are facilitated, the height of the reserved space at the lower part of the wiring terminal or the wiring busbar is not lower than 600mm, the width meets the requirements of the number of wiring cable terminals and the tapping electric safety space of a construction wiring phase line, and the space thickness is not smaller than 400mm. The cable penetrating position is provided with a cable fixing section steel and a cable fixing clamp. The drawer type intelligent circuit breaker is arranged at the low-voltage side, and a zero-flashover structure and a low-temperature-resistant product are adopted as the line protection of the low-voltage side. The tripping unit has the functions of long delay protection, short delay protection, instantaneous tripping protection and grounding protection, and is provided with a communication module and an electric operating mechanism. The current and time settings can be continuously adjusted on site as desired. The release is in a modularized design, and intelligent function expansion of the circuit breaker can be achieved on-line and anywhere upgrading under the condition that power failure is not needed. The circuit breaker has a self-diagnosis function, and the internal diagnosis information comprises the following functions: whether the electric switching-on and switching-off is successful, whether the built-in and external transformers are connected reliably, and whether the control unit operates normally. The low-voltage surge protector for the intelligent measurement and control unit of the box transformer substation is characterized in that a low-voltage side breaker switch-on and switch-off position signal, a protection action signal, a low-voltage cabinet control power supply vanishing signal and the like are additionally provided with 1 pair of normally open passive contacts and are distributed to the box transformer substation secondary terminal strip for supplying the box transformer substation by adopting a B+C-level lightning protection and surge protection device, the low-voltage surge protector has a fault signal uploading function, and the on-off state of a front-end protection element also has a signal sending function. The low voltage is configured with 3 metering current transformers (0.2S level) and 3 measuring protection current transformers (0.5/5P 30), the multifunctional meter is configured with large screen liquid crystal display, and the RS485 interface is configured to send out information such as current and voltage. 3 low-voltage transformers (0.5 level) are configured, so that the output of the low-voltage side voltage AC100V can be realized, and voltage signal input of corresponding levels is provided for an electric meter (provided by a local electric power bureau) and an intelligent measurement and control device.

Self-powered equipment: the box-type transformer station is internally provided with self-power-consumption equipment (an auxiliary transformer is arranged according to three phases and dry mode, rated voltage output is AC400V, and a wiring terminal is provided with a protective cover), and the self-power-consumption equipment comprises an illumination device, an anti-condensation device and the like. The self-used power supply capacity meets the power supply requirement of the equipment and leaves a certain margin. The cut-off capacity of the wire-feeding knife-fuse switch and the attached fuse meets the requirement of a short-circuit current value at the low voltage side. The low-voltage side is provided with an online UPS power supply special for low-temperature-resistant electric power, and an alternating current power supply is provided for measurement and control and protection equipment and the like of the box-type transformer substation. The UPS power supply capacity is 2kVA, and the configuration battery capacity meets the 2-hour power failure requirement. The UPS power supply is provided with 1-cycle AC220V power supply as an input power supply by the auxiliary power utilization system, and a battery direct-current power supply is used as a hot standby. When the AC power supply of the auxiliary power system is interrupted, the auxiliary power system can be switched to the DC power supply without time limit, so that the AC output is ensured to be uninterrupted. Lithium batteries-power lithium batteries are selected as batteries for the UPS matching, the lithium batteries are utilized in a gradient manner (the secondary utilization of the power lithium batteries after the recovery is realized based on the consideration of the full life cycle use angle of the batteries which are used for recovering the battery raw materials by using the secondary utilization resources for automobile application and the battery system of the battery raw materials, the cost of the batteries can be reduced, and the environmental pollution is avoided.

Box transformer structure: the functional new energy box is arranged into a delta-shaped structure. The box body has enough mechanical strength guarantee, and does not deform in transportation, hoisting and installation. Attractive appearance, and coordinated colors and environment. The shell is made of stainless steel plates, is uniformly sprayed with paint, is resistant to insolation, corrosion and sand and has firm adhesive force. The high-low pressure unit chamber shell of the box body is of a full-sealing structure, the protection level is not lower than IP54, and the protection level of the transformer oil tank is not lower than IP68. The thickness of the material of the oil tank is more than or equal to 6.0mm, the thickness of the material of the expansion radiating fin is more than or equal to 2.0mm, and the thickness of the material of the fin radiating fin is more than or equal to 1.5mm. The inclination of the top cover of the box body is larger than 3 degrees, and a rainproof sealing cover plate and a rainproof eave are arranged. The exposed element is additionally provided with a protective cover for preventing mechanical damage and rain and wind sand. The inner and outer surfaces of the box body and the cabinet are smooth and clean, the phenomena of rust, coating falling and collision damage are avoided, the coating layer is firm and uniform, and obvious chromatic aberration and light reflection are avoided. The base of the box body and all exposed metal parts are subjected to rust prevention treatment, and a durable protective layer is sprayed. The metal components are also subjected to rust-proofing treatment and sprayed with a protective layer. The heat dissipation of the box transformer room unit adopts a natural ventilation heat dissipation mode, the side face of the transformer room shell adopts a metal mesh plate, the thickness of the metal mesh plate is 3mm, the mesh diameter is 30mm, and the metal mesh plate is made of stainless steel. The components and cables in each unit chamber in the box transformer are all provided with measures for preventing small animals from being bitten. The case becomes the bottom and sets up the manhole door that gets into case and become basic cable pit, and this manhole door sets up the inside at case low pressure side shell to take the apron sealed and convenient dismantlement. The box door is provided with a windproof hinge, all doors on the box are outwards opened, the opening angle is more than 90 degrees, and a positioning device is arranged. The box body of the box-type transformer is provided with a special grounding body, the grounding conductor is provided with two fixed connection terminals connected with a grounding grid, and the grounding conductor has obvious grounding marks. The metal framework of the box body, the high-low power distribution device and the metal bracket of the transformer part are all provided with grounding terminals meeting technical conditions and are reliably connected with a special grounding conductor. The special grounding conductors of the high and low voltage distribution devices and the transformer part are connected with each other or are reliably connected together through special terminals, the non-electrified metal exposed parts of all the high and low voltage equipment are reliably grounded, and the door and the extractable part are reliably grounded when in an open or isolated position under normal running conditions. The high-pressure chamber and the low-pressure chamber are internally provided with the illuminating lamps, the illuminating switch is arranged on the inner door, and when the door is opened, the illuminating lamps are automatically opened, so that the operation and the maintenance are convenient. The box becomes the lower business turn over of cable and goes out the line down, and the mounted position of reservation cable can be convenient for test and wiring construction and operation maintenance space requirement. The high-voltage cable wiring busbar can be convenient for connecting a plurality of cables. The circuit breaker and the busbar adopt firm fixing measures to avoid damage to the circuit breaker and deformation of the busbar caused by excessive stress of the access cable.

Monitoring and protecting:

an intelligent environment management system is arranged in the box body: the method realizes transformer oil surface temperature monitoring, high-voltage distribution room and low-voltage distribution room environment temperature and humidity on-line monitoring and dehumidification treatment, fire smoke alarm, roof dew point on-line monitoring and condensation treatment. The system consists of an intelligent management system host, 2 environmental temperature and humidity sensors, 2 dew point collectors, 2 smoke sensors, 1 transformer oil surface temperature sensor and 12 heating films, wherein the two environmental temperature and humidity sensors are arranged in a high-voltage cable chamber and a low-voltage distribution chamber.

The system can monitor the temperature and humidity of air in the high-voltage cable chamber and the low-voltage distribution chamber respectively through the temperature and humidity sensor and the dew point collector, and the dew point temperature of the inner top plate automatically starts the indoor intelligent dehumidifier and the heating film attached to the top plate for heating, so that the indoor air humidity is reduced, and the condensation caused by the temperature difference condensation or the overlarge moisture of the inner top plate is eliminated; the system can monitor the oil surface temperature of the transformer, and can output overtemperature alarm and an overtemperature Wen Tiaozha passive contact signal when the oil temperature of the transformer is too high, so as to finish overtemperature early warning and tripping functions of the transformer; the system carries out fire disaster early warning through the smoke sensor, and simultaneously, the system is provided with an RS485 interface and a Modbus-RTU protocol, has the function of communicating with the measurement and control device, and uploads relevant data of the system and alarming information with a time stamp.

The box-type substation configuration monitoring system comprises: the monitoring, control, measurement and protection of all the box transformer substation are realized, real-time data and information of all the box transformer substation are collected, and the low-voltage side switch of the box transformer substation can be controlled by a remote place and a site respectively.

The monitoring system structure comprises: the box transformer substation monitoring system is independently networked and adopts an open and layered network structure, and consists of centralized control layer equipment and an on-site measurement and control protection unit. The centralized control layer equipment is configured according to the engineering perspective scale, and the on-site measurement and control protection unit is configured according to the engineering actual construction scale. The centralized control layer equipment group screen is arranged in a secondary equipment room of the monitoring center, and the on-site measurement and control protection units are respectively arranged in corresponding box-type substations. The selection of all equipment and elements of the on-site measurement and control protection unit ensures normal operation in the installation and operation environment of the box-type substation. The local measurement and control protection unit is provided with a ring network switch, forms a plurality of independent ring networks according to the on-site networking condition, shares a transmission medium with a monitoring system of a unit, realizes reliable communication with a transformer substation monitoring system, and can transmit box transformer information to a power grid dispatching department.

Centralized control layer equipment and functions: the centralized control layer device comprises: ring network switch, convergence switch, core switch, screen body and accessories. The centralized control layer equipment mainly comprises the following functions: the on-site measurement and control protection unit collects the switching value and analog quantity information of the box-type transformer substation in real time, performs digital filtering and validity checking on the collected real-time information, performs engineering value conversion, signal joint jitter elimination, scale calculation and other processing, thereby providing various real-time data such as applicable current, voltage, active power, reactive power, power factor and the like, and sending the data to a monitoring center and a power grid dispatching department, and receiving a dispatching instruction issued by the monitoring center and the power grid dispatching department to control on-site equipment.

In-situ measurement and control protection unit and function: the in-situ measurement and control protection unit comprises: measurement and control protection device, network switch, fiber terminal box, etc. The measurement and control protection device collects switching value information and analog value information of the box-type substation in real time and sends the information to the centralized control layer equipment through the optical fiber ring network. The measurement information comprises a load switch position, a pressure release action signal, a high-voltage fuse fusing, a transformer operating temperature, a transformer temperature high, a transformer temperature ultrahigh, a high oil level abnormal signal, a low-voltage frame circuit breaker closing and tripping position, a low-voltage frame circuit breaker accident tripping and box-type transformer door opening signal and the like. The oil level control device has the non-electric quantity protection functions of pressure release, abnormal oil level, ultrahigh oil temperature and the like of the transformer.

Panoramic monitoring source control terminal equipment: the new energy panoramic monitoring system of the box transformer configuration comprises a multifunctional intelligent IED of a new energy station, a new energy centralized control device and a station side safety and stability control device.

The new energy multifunctional intelligent IED integrates the function of a source control terminal IED, has 2 paths of RJ45 ports and 8 paths of 485 serial ports, supports Modbus, GOOSE, UDP, ethernet 104 and other communication protocols, is used for communication with a fan main controller or a photovoltaic inverter, acquires the operation information of the fan or the inverter and realizes the control function of the fan or the inverter.

The operation information mainly comprises information such as a grid-connected state of the power generation unit, a grid-disconnected state of the power generation unit, a low-pass state of the power generation unit, a high-pass state of the power generation unit, a permission state of the power generation unit and the like, and meanwhile, the multifunctional intelligent IED of the new energy station collects and calculates the following analog quantity information through an alternating current plug-in unit and a CPU plug-in unit. The state and analog quantity information is sent to the new energy centralized control device through GOOSE in a single-ring bidirectional ring network communication mode formed by 2 ring network communication ports of the CPU, and meanwhile, a power generation unit cutting command and a power generation unit power returning command issued by the new energy centralized control device are received and used for fast power adjustment of a fine cutting machine (taking a single fan as a unit) and a photovoltaic station.

And the source control terminal: the source control terminal is a data acquisition and control device arranged on the wind power generation side/the photovoltaic power generation side and is used as a link between the power generation unit and the emergency monitoring layer device, so that the functions of rapid acquisition and uploading of the operation information of the power generation unit, rapid receiving and executing of control instructions and the like are realized.

The source control terminal layer has the functions of power generation unit grid connection, grid disconnection, low penetration and the like, and is used for rapidly collecting and transmitting information and rapidly receiving and executing control commands, the information transmission speed meets the requirement of millisecond-level emergency control, and meanwhile, the source control terminal layer has the function of power generation unit secondary/super oscillation monitoring and alarming.

The functions are as follows: and (3) rapidly acquiring and identifying the operation condition of the power generation unit, and sending the operation information of the power generation unit required by millisecond-level emergency control to an emergency state monitoring layer. And receiving a cut-off command or a power adjustment command issued by the emergency state monitoring layer, and rapidly executing the cut-off command or the power adjustment command. And monitoring the running state of the self-service monitoring system and sending the running state information to an emergency monitoring layer. And collecting three-phase voltage and three-phase current of the power generation unit, wherein the sampling frequency is not less than 1000Hz. Continuously recording the original sampling signal to form a data file every minute, wherein the file data format meets the COMTRADE format requirement; the wave recording file should be stored in the nonvolatile memory, and can respond to the calling command of the emergency monitoring layer device and upload the wave recording file. And carrying out sub/super synchronous oscillation analysis and alarm based on the sampling data, and uploading analysis results and alarm information to an emergency monitoring layer. The system has the communication interfaces of optical fibers and Ethernet ports, supports the function of rapid communication protocol conversion, and supports communication protocols such as GOOSE, modbus, UDP. The switching value output function is provided.

Information interaction requirements: the source control terminal layer information interaction meets the requirements related to the B table B.3 of the annex B of the Q/GDW 12056-2020.

Performance index requirements: the communication message adopts multiple verification, the command message can be executed after effective confirmation, and misoperation of the device is prevented. The delay from the receipt of the control command to the completion of the execution by the source control terminal layer is not more than 60ms. The communication between the source control terminal and the power generation unit meets the real-time requirement of emergency control.

Other requirements are: the source control terminal is provided with the capability of communicating with the inverter or the data collector GOOSE and the capability of communicating with the emergency monitoring equipment GOOSE. The source control terminal equipment has the function of an optical fiber ring network.

Remote power cut and power transmission and fire monitoring system:

and (5) power interruption and transmission management: the remote/on-site opening and closing and the isolation knife and the low-voltage breaker internal fixed camera are realized through the control system and the electric operating device, and the indoor inspection robot is configured, so that the manual operation can be assisted.

The optical fiber temperature detectors are arranged at the high-voltage inlet wire interval, the low-voltage interval and the cable duct, so that temperature variation of the cable is timely found, an alarm is given to an upper computer, the temperature abnormality position is quickly found, and the workload of on-site inspection staff is reduced.

The smoke detector is arranged at the high-voltage inlet wire interval and the low-voltage interval, the manual alarm button is arranged at the main inlet and outlet, and the signal enters the fire alarm controller. And a gas fire extinguishing device is arranged indoors to realize interlocking with a fire monitoring system.

Temperature sensing self-starting fire extinguishing device: the temperature sensing self-starting fire extinguishing device is arranged at intervals of high and low pressure. The device is an independent automatic fire detecting and extinguishing system, once a fire disaster occurs, a fire detecting pipe is heated, ruptured and decompressed, a container valve of the extinguishing device is started, and the extinguishing agent is sprayed to the fire extinguishing agent at a break (namely a part needing to be extinguished) through the fire detecting pipe to extinguish the fire.

Inspection robot system: the indoor track type robot inspection system consists of a track assembly, a robot body, a software system and a communication control box. The track assembly is designed and installed according to the actual condition in the box transformer substation, and the robot walks along the track to realize the whole coverage of the object to be inspected in the box transformer substation.

Image recognition function: the rail hanging robot completes data acquisition of video images through a visible light camera carried by the rail hanging robot, and performs intelligent analysis processing on image data through a self-developed high-precision image recognition algorithm to recognize image contents. The image recognition function can accurately recognize various meters such as indoor meters, pressure plates, switches, indicator lamps, equipment appearance and the like, and can automatically read the meters, so that the state information of power equipment and environment in the station can be comprehensively mastered.

Infrared temperature measurement function: the rail hanging robot needs to collect temperature data of indoor power equipment by utilizing an infrared thermal imager carried by the rail hanging robot, then analyzes the collected data, further diagnoses faults and thermal defects of heating equipment, and triggers corresponding alarms. The infrared temperature measurement function comprises infrared general measurement, accurate temperature measurement, remote control temperature measurement and the like. After the inspection task is executed, a task report is automatically generated, and high-density and high-granularity detection and multidimensional analysis management of power distribution room equipment and environmental temperature are realized.

Dynamic environment monitoring: the environment monitoring module carried by the rail hanging robot is provided with environment information such as harmful gas, temperature, humidity and smoke in the monitoring environment. The environment information collected by the robot in real time is timely transmitted to the control center, on-site environment information is provided for operators, and when the harmful gas is monitored to exceed the standard, the system gives an alarm to prompt the operation and maintenance personnel to timely process the harmful gas.

Two-way pronunciation intercom: the bidirectional voice function of the rail hanging robot means that a centralized control indoor worker can talk between the inspection robot management background and the robot, and the bidirectional voice function of the rail hanging robot is realized by opening the voice talk of the inspection robot management background, so that the rail hanging robot can be used for remotely commanding on-site work by the management background or requiring rapid evacuation under emergency.

And (3) task management: in the monitoring platform, task management is divided into 7 large modules of comprehensive inspection, routine inspection, special inspection, custom tasks, map point selection, task display and the like, each large module is divided into different small modules, and different types of tasks can be established according to various conditions. The task system can not only manually execute tasks, but also distribute and execute tasks according to schedules to realize an automatic inspection function.

Inspection function: the automatic inspection function of the rail hanging robot enables the rail hanging robot to automatically complete indoor inspection work, and the rail hanging robot has the characteristics of high automation and intelligence, thereby replacing manual inspection. The automatic inspection mode mainly comprises the following steps: timing inspection, routine inspection, single inspection, manual control inspection, etc., and various modes support mutual switching. The robot can finish tasks according to a preset inspection mode, and inspection activities such as meter reading, power equipment temperature measurement and environment monitoring are finished according to a set rule.

Data statistics and analysis: the monitoring platform has the functions of storing, analyzing, counting and searching the monitoring data. The monitoring platform performs standardized sorting and ordering on the data and supports export and storage of excel reports and pdf reports. The operation and maintenance personnel can search the data in the monitoring platform according to the task or the monitoring point to quickly look up the monitoring data.

And (3) report output: the track-hanging robot can automatically generate a report after executing a task, and an operation and maintenance person can search and check the report according to time, inspection type, task name and the like on the monitoring platform. The operation and maintenance personnel can search according to the requirements to check various reports, including inspection task reports, data reports, alarm record reports, environmental information reports and the like.

External interface: the robot system provides an API interface to the outside and can perform data interaction with an external system. The remote control, task issuing, inspection result and alarm information of the robot can be obtained through API call, so that the robot system is integrated to an upper management control platform, and linkage and unified supervision among multiple systems are realized.

In FIG. 7, A-W is a 35kV charge indicator, a 35kV disconnecting switch, a 35kV lightning arrester, a 35kV load switch, a 35kV fuse, a transformer, a low-voltage multifunctional meter, an intelligent measurement and control device, a PT protection fuse, a low-voltage PT device, a low-voltage side circuit breaker, a low-voltage side measurement transformer, a low-voltage side knife fuse isolation device, a surge protector, a control transformer, a miniature circuit breaker, a socket, a UPS uninterrupted power supply, a low-voltage side measurement and protection transformer, an intelligent environment management device, a panoramic monitoring source control terminal device, a kilowatt-hour meter (reserved) and a fluorescent optical fiber temperature measuring device in sequence.

The new energy box-type transformer station has the advantages that: the box transformer high-voltage unit and the box transformer low-voltage unit are of a fully-sealed and insulating shielding structure, the outside is free of insulating distance, the temperature rise is low, the sealing is excellent, the failure rate is low, and the personal safety is reliably ensured. The transformer and the high-voltage assembly are arranged in a box body, the high-voltage fuse is arranged in the oil tank, the side wall of the oil tank does not need to be provided with holes, and hidden danger of oil leakage does not exist. The box transformer has compact structure and reasonable layout, and can be placed in a manhole. Is suitable for environments with severe natural conditions (beach/desert/grassland). The power transformer is an amorphous alloy transformer, so that the loss is low, and the short circuit resistance meets the standard requirement of the transformer. The high-voltage side isolating switch can form a visual fracture, so that the normal power generation function of other box transformers in the same circuit is not affected by power failure overhaul of a single box transformer. And an intelligent environment management system is configured, so that the condensation or icing condition inside the on-site operation cabinet is effectively solved. The occurrence of insulation defects and accidents which endanger equipment and personal safety are avoided due to the fact that water drops generated by condensation drop on components, wiring terminals, bus bars and the like in the cabinet. The system adopts comprehensive treatment control aiming at condensation or icing formation mechanism (relative humidity of air, air temperature in the box body and the like), thoroughly damages condensation or icing formation conditions and eliminates cabinet condensation or icing. Configuring panoramic monitoring source control terminal equipment: the functions of real-time tracking of the new energy fault process, refined up-feeding of the new energy power generation unit information, refined cutting machine, rapid power adjustment of the photovoltaic station and controllable resource monitoring of the new energy are realized. Based on real-time perception of the state of the unit, when a serious AC/DC fault occurs in the power grid, the panoramic monitoring system sends the off-grid power loss of the unit to a large power grid stability control decision master station in real time, and an area control strategy is optimized; when a new energy station is needed to cut, a single unit is used as a minimum control object to perform unit-level accurate control, so that the running economy of the station is improved. The lithium battery is selected as the battery in the UPS, and the UPS has the advantages of small volume, light weight and high specific energy; the charge holding capacity is strong, and the working temperature range is wide; the cycle service life is long; the safety is high, and the safe and rapid charge and discharge can be realized. No environmental pollution; has no memory effect and the like. The power lithium battery is selected to be utilized in a gradient manner, and is closely matched with the government to construct a low-carbon economy and environment-friendly society. The method has the advantages of effectively utilizing resources, strictly protecting ecological environment, establishing a healthy, green and low-carbon cyclic development economic system and promoting the realization of carbon peak and carbon neutralization targets. The box-type transformer substation realizes an unattended scheme, has the functions of remote power cut and power transmission, the in-box configuration inspection robot and automatic fire extinguishing, and the circuit breaker is provided with a communication module and an electric operating mechanism, so that remote opening and closing can be realized, and a matched remote power cut and power transmission management system is realized. The intelligent system requirements of new energy in the future are met, the functional integrated panel is arranged in the low-pressure compartment, and the panel body is provided with an integrated explosion-proof glass door. The intelligent measurement and control device for the box transformer substation, the intelligent environment management device, the panoramic monitoring source control terminal device, the fluorescent optical fiber temperature measurement device, the fire controller, the inspection robot communication control, the matched ring network switch and accessories are integrally installed in the cabinet body, so that the intelligent environment measurement and control device is convenient to install, debug and manage, and the reliability is high.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A new energy box-type transformer station, comprising: the box-type transformer substation bottom bracket (9), wherein a box-type transformer substation high-voltage incoming line interval (10), a box-type transformer substation high-voltage operation interval (11) and a box-type transformer substation low-voltage interval (14) are arranged on the box-type transformer substation bottom bracket (9);

a charged indicator (1), a high-voltage isolating switch (2), a high-voltage lightning arrester (3) and a high-voltage sleeve (4) are arranged in the box-type transformer high-voltage incoming line interval (10); a transformer oil tank (12) and a self-powered transformer (15) are arranged in the tank-to-high-voltage operation interval (11), and a transformer radiator (13) is arranged on one side of the transformer oil tank (12); a transformer low-voltage outlet sleeve (16) is arranged in the box low-voltage interval (14); the box-type high-voltage inlet wire interval (10) is completely isolated from the box-type high-voltage operation interval (11) and the box-type low-voltage interval (14); the high-voltage isolating switch (2) adopts a three-station isolating switch, and can form a visible fracture.

2. The box-type transformer station according to claim 1, characterized in that the box-type transformer high-voltage inlet space (10) is provided with a high-voltage cable inlet hole (6), the box-type transformer low-voltage space (14) is provided with a low-voltage side cable inlet hole (17), and the high-voltage cable (5) enters from the high-voltage cable inlet hole (6).

3. The box-type transformer station according to claim 1, characterized in that a box-type transformer manhole (18), a functional centralized panel (19) and an inductive LED lighting device (22) are arranged in the box-type transformer low-voltage interval (14).

4. The box-type transformer station according to claim 1, characterized in that the box-type transformer high-voltage incoming line interval (10) is provided with a patrol robot (20), a temperature-sensing self-starting fire extinguishing device (21) and a smoke sensing device (23).

5. The box-type transformer station according to claim 1, characterized in that the high-voltage arrester (3) is a gapless metallic zinc oxide arrester and is provided with on-line monitoring means.

6. The box-type transformer station according to claim 1, wherein the box-type transformer high-voltage incoming line interval (10) is provided with an active electromagnetic lock on a high-voltage chamber door, and a rust-proof anti-theft mechanical lock on an outer door.

7. The box-type transformer station according to claim 1, characterized in that a high-voltage load switch, an off-circuit tap-changer, a pressure relief valve, an oil temperature gauge, an oil level gauge, a pressure gauge, an oil drain valve are installed in the box-type transformer station high-voltage operation interval (11).

8. The tank transformer station according to claim 7, characterized in that a high voltage fuse is provided in the transformer tank (12).

9. The box-type transformer station of claim 8, wherein the arrangement of the high voltage fuses is spatially offset from the high voltage load switch operation.

10. A box-type transformer station according to claim 1, characterized in that the transformer radiator (13) is provided with a protective cover.

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