I. Product overview

     Renewable energy (photovoltaic, wind turbine) system installation and commissioning training platform mainly consists of roof photovoltaic installation platform, photovoltaic energy storage grid-connected system, photovoltaic grid-connected and off-grid system installation and commissioning platform, small-scale wind and solar complementary system, operating table and measuring tools and other components. The actual household photovoltaic system (grid-connected, off-grid, energy storage) and small-scale wind and solar complementary system (wind and solar complementary street lights, wind and solar complementary video monitoring, wind and solar complementary weather station) for the application of scenarios, the use of actual engineering widely used equipment (photovoltaic modules, grid-connected inverters, hybrid (off-grid) inverters, storage inverters, lithium batteries, photovoltaic convergence tanks and so on), the true restoration of the actual engineering construction and commissioning site. The training platform adopts modular combination design to train students in scheme design, process design, equipment and component installation, electrical connection, control line design and connection, system debugging, operation and maintenance of household PV systems and wind and solar hybrid systems.

II. Technical parameters

1. Input voltage: single-phase three-wire ~ 220V ± 10% 50Hz

2. Working environment: ambient temperature range -5℃～+40℃ relative humidity＜85% (25℃) altitude＜4000m

3. Device capacity: <6kVA

III. System components and functions

1.THRES-3A Rooftop Photovoltaic Mounting Platforms

     It mainly consists of roof (with square tube welding + multilayer board structure), rails and mounting accessories, 450W PV modules, safety rope bracket, inspection drone, PV special cable, etc. It can complete the installation and erection of roof PV modules.

2.THRES-3B Grid-connected photovoltaic energy storage system

    Photovoltaic energy storage and grid-connected system mainly consists of analogue wall (length 2050mm×width 900mm×height 2020mm, the frame and analogue wall are assembled by welding of high-quality cold-rolled steel plate on the front side, and solid wood multi-layer board on the back side), lithium batteries, storage inverters, photovoltaic convergence box, photovoltaic grid-connected box, bi-directional power meter, electrical control box (including S7-200 SMART CR40 PLC, 10.1 inch touch screen, AC contactor, power module, leakage protection, air switch, switch, changeover switch, indicator light, etc.), AC load, emergency load, trunking and accessories, cables, etc., constituting a complete PV energy storage and grid-connected system (supporting a variety of operating modes: grid-connected system, off-grid system, energy storage system), which can realise the control of PV, power grid, energy storage, EPS, DC access; energy storage inverters, two-way Energy meter, convergence box collector status monitoring display; AC load, emergency load energy management (load access control).

(1).li-ion battery

     The use of long-life LiFePO4 batteries and a high-performance BMS to protect and manage the battery system provides a wider range of uses and a longer life than conventional batteries.

• Rated capacity: 50.0Ah
• Nominal voltage: 48V
• Standard discharge: 25.0A/40.5V
• Maximum output power: 2.4KW
• Power Port: Ring Terminal
• Communication interface: CAN

(2).Energy storage inverters

     Single-phase energy storage inverter supports PV, battery, diesel, grid and load input at the same time, built-in self-generation and self-consumption, peak shaving and valley filling, backup power and other application modes, supports parallel connection of multiple machines, suitable for a variety of domestic and commercial energy storage application environment. With battery reverse connection protection, support RS485/CAN/DRM, support battery automatic switching, compatible with lead-acid and lithium batteries and other battery access.

DC input parameters (PV)

• Maximum input power : 4.6KW
• MPPT voltage range
• Maximum input current per MPPT : 14A
• Number of MPPT : 2
• Number of strings that can be accessed per MPPT  : 1

AC Output Parameters

• Maximum output current : 13A
• Rated output power : 3kVA
• Rated output voltage: 230VAC, L + N + PE
• Output voltage range : 176V～270V
• Rated voltage frequency : 50Hz/60Hz

Emergency power supply output (EPS)

• Maximum output power: 3kVA
• Rated output voltage: 230VAC, L + N + PE
• Rated output current: 13A
• Rated output frequency : 50Hz/60Hz

Battery parameters

• Battery voltage range: 40V～58V
• Maximum charging voltage : 58V
• Maximum charge/discharge current: 95A/62.5A
• Battery type: lithium battery/lead-acid battery
• Communication interface : RS485/CAN/DRM

Maximum efficiency: 97.60 per cent

Protection functions: AC short-circuit protection, AC output over-current protection, output over-voltage protection, insulation impedance protection, residual current (RCD) detection, surge protection, islanding protection, temperature protection, ground fault monitoring.

(3).Photovoltaic converter box

     The convergence box in the photovoltaic power generation system is to ensure that the photovoltaic module orderly connection and convergence function of the wiring device. The device can guarantee the PV system in the maintenance, inspection, easy to cut off the circuit, when the PV system failure to reduce the scope of power outages. The PV convergence box adopts 4 in 2 out DC500V parameter configuration, in which one way with monitoring function (real-time monitoring string current, bus voltage, temperature, switching status, etc.). Mainly includes 8 DC fuses DC500V/15A, 2 DC surge protectors 2P/DC500V/40KA, 2 anti-reverse diodes 55A/2000V, 2 DC circuit breakers 2P/63A/DC500V and monitoring module (support DC1700V system monitoring host + rail mounting, perforated 4-channel Hall sensor) and so on.

(4).Photovoltaic Grid Box

     PV grid-connected box includes knife gate switch 2P/220V/63A, bidirectional energy meter (class 1 accuracy, 220V/5(40)A, RS485 communication), PV grid-connected circuit breaker 2P/C63A (over-undervoltage/out-of-voltage protection, overload and short-circuit protection, automatic reclosing), surge protector 40kA/2P/440V with remote telecommunication, circuit breaker 2P/63A, earth leakage protector 2P/C16A, etc.

(5).PLC

     Adopting Siemens S7-200 SMART CR40 PLC (relay output, 220V AC power supply, 24 inputs/16 outputs), it realises PV, grid, energy storage, EPS, DC access control through the control program; status monitoring of storage inverters, bi-directional energy meters, convergence box collectors and display on the touch screen; AC loads, emergency loads access control.

(6).touchscreens

     Adopts 10.1-inch high-brightness TFT LCD (resolution 1024×600), Cortex-A7 CPU as the core (main frequency 800MHz), high-performance embedded integrated touch screen. 1 RS232, 2 RS485, 1 Ethernet, 1 USB, power supply DC24V. communicates with the PLC host through the switch and displays the information collected by the PLC host in real time. The information collected by the host, through the virtual keys on the touch screen to switch the working status of the device.

3.THRES-3C Installation and Commissioning Platform for Grid-connected and Off-grid Photovoltaic Systems

     Photovoltaic and off-grid system installation and commissioning platform mainly has a simulation wall (length 2050mm × width 900mm × height 2020mm, the frame is made of high-quality cold-rolled steel welding assembly, double-sided solid wood multi-layer boards), grid-connected inverters, hybrid (off-grid) inverter, lead-acid batteries, 2 sets of 2 into 1 out of the DC500V photovoltaic convergence device, photovoltaic grid-connected devices, hybrid (off-grid) inverter power distribution devices, waterproof box (125*125*75mm) 4, rail-type single-phase electronic energy meter (220V 0.25-0.5(80)A, RS485 interface), 3KW DC adjustable power supply, trunking and fittings, cables, etc., to achieve the PV grid-connected and off-grid system installation and commissioning.

(1).Grid-connected inverters (with MPPT function)

     The PV grid-connected unit is the core component in solar PV grid-connected power generation, where the sunlight energy is converted into DC energy through PV modules, and then converted into sinusoidal alternating current (AC) power with the same frequency and phase as that of the public grid by PV grid-connected inverters, and feeds this power into the power grid.

• DC maximum input power: 1200W
• DC voltage input range: 60～450V
• AC rated output power: 1000W
• MPPT efficiency: 99.9 per cent
• Maximum AC output current: 4.5A
• Protection functions: input over-voltage protection, input over-current protection, DC insulation monitoring, DC monitoring, ground fault current monitoring, grid monitoring, islanding protection, short-circuit protection and overheating protection, etc.
• Communication interface: RS485

(2).Hybrid (off-grid) inverters

     It integrates solar energy storage with utility power charging and storage, AC sine wave output, and is suitable for applications such as powerless areas, nomadic areas, communication base stations, unstable power areas, islands, border posts, scenic spots management offices, newspaper kiosks, and battery manufacturer's battery PACK supporting applications.

• Rated power: 3.2KVA/3KW
• DC input: 24VDC (rated battery voltage)
• Rated input voltage: 230VAC
• Rated output voltage: 230VAC
• Maximum PV array power: 3KW
• Rated PV voltage: 240VDC
• Maximum PV array open circuit voltage: 450VDC
• MPPT voltage range: 90VDC～430VDC
• Protection function: AC short-circuit protection, AC over-current protection, over-temperature protection, etc.

(3.)battery (e.g. in car)

• Capacity: 12V/120AH
• Quantity: 2 groups

(4).3KW DC adjustable power supply (300V/10A)

• Voltage: 0-300.00V, 5-digit display
• Current: 0-10.00A, 4-digit display
• Power: 3KW
• Communication interface: RS485

(5.).2 in 1 out DC500V photovoltaic convergence device (2 sets)

• DC fuse: 1100VDC/20A (4 pieces)
• DC Circuit Breaker: 2P/40A/550VDC
• DC Surge Protector: 2P/500VDC/40KA

(6).Photovoltaic grid-connected devices

• Disconnect switch: 2P/63A
• PV grid-connected circuit breaker: 2P/C63A (over-under-voltage/out-of-voltage protection, overload and short-circuit protection, auto reclosing)
• Surge Protector (Lightning Protector): 40kA/2P/440V with Remote Signal
• Air switch: 2P/C20A

(7).Hybrid (off-grid) inverter distribution devices

• Leakage protector: 2P/C16A
• Air switch: 2P/C10A
• DC Circuit Breaker: 2P/40A/550VDC
• DC fuse: 1100VDC/20A
• Surge Protector (Lightning Protector): 40kA/2P/440V with Remote Signal

4.THRES-3D Compact Wind Turbine System

     Small-scale wind and solar hybrid system mainly has photovoltaic modules, wind turbine, wind and solar hybrid controller, lead-acid batteries, off-grid inverter, infrared network camera, wind speed sensor, wind direction sensor, illuminance sensor, temperature, humidity and pressure built-in louvre box, the weather station intelligent gateway, two DC miniature circuit breaker 2P/C20A, power distribution box (H40 * W30 * D14cm), charger, Lighting, transfer switch, switching power supply, leakage protector, fan objects (base, sensor bracket, column, flange, PV module fixing parts, etc.), wire channel and accessories, cables, etc., constituting a complete wind and solar complementary street light system, wind and solar complementary video monitoring system, wind and solar complementary weather station system, to meet the functional requirements of the wind and solar complementary system installation and commissioning.

(1).photovoltaic module

• Maximum power Pmax: 20W
• Optimum operating voltage Vmpp: 17.8V
• Optimum operating current Impp: 1.12A
• Open circuit voltage Voc: 21.4V
• Short-circuit current Isc: 1.19A
• Component size: 430 x 430 x 20mm

(2).wind turbine

• Rated power: 400W
• Rated voltage : 24V
• Starting wind speed: 2.5m/s
• Rated wind speed : 11m/s
• Number of blades: 3
• Generator type: three-phase AC permanent magnet generator

(3).Wind and solar complementary controller

• Rated fan input power: 600W
• Rated PV input power: 300W
• Rated battery voltage: 12V mode/24V mode
• Display mode: liquid crystal display
• Over-charging and over-discharging protection for the battery.

(4).battery (e.g. in car)

• Capacity: 12V/17AH
• Quantity: 2 groups

(5).Off-grid inverters

• Input DC voltage range: 22-33VDC
• Output voltage: 220/230/240VAC
• Output rated power: 300W
• Output waveform: sine wave
• With low voltage alarm protection, low voltage shutdown protection, overload protection, overvoltage protection, overheating protection and short circuit protection.

(6).Wind Speed Sensor

• Measuring range: 0～70m/s
• Measurement accuracy: ±(0.3+0.03V)m/s
• Resolution: 0.1m/s
• Output signal: RS485 Modbus protocol

(7).Wind Sensors

• Measuring range: 0～360°
• Measurement accuracy: ±1.4°
• Resolution: 1°
• Output signal: RS485 Modbus protocol

(8).Illuminance Sensor

• Measuring range: 0-200000Lux
• Wavelength range: 380nm-730nm
• Accuracy: ± 7 per cent
• Output signal: RS485 Modbus protocol

(9)Temperature and humidity pressure built-in louvre box

• Measuring range: -50～70℃ 0～100%RH 10～1100hPa
• Measurement accuracy: ±0.3℃ ±3%RH ±0.1hPa
• Resolution: 0.1℃ 1%RH 0.1hPa
• Output signal: RS485 Modbus protocol

(10).Weather Station Intelligent Gateway

• The smart gateway consists of ARM main control module, WIFI communication module and housing, which reads the data of each sensor through the MODBUS protocol of RS485 interface and uploads the sensor data to the cloud platform through the MQTT protocol.
• Mobile APP application: support Android mobile phone system, able to collect and monitor a variety of wireless sensor data, control the status of the module (switch), with numbers, dials, folding lines, bar graphs and other display modes, support real-time data display and historical data query function.
• Cloud platform-Web page application: collect and monitor a variety of wireless sensor data, control the status of the module (switch), with numbers, dials, folding lines, columns, scatter plots, digital tubes, radar charts, word frequency statistics, and other display modes, support for real-time data display and historical data query function.

5.Operation desk, computer table and supporting measuring tools

• 1200 operating table: L x W x H = 1200mm x 760mm x 820mm.
• Profile computer desk: L x W x H = 625mm x 600mm x 1045mm.
• Supporting tools: including digital multimeter, AC and DC clamp-on ammeter, calculator, compass, level, megohmmeter, grounding resistance meter, digital level, advertising ruler, hand drill, MC4 photovoltaic tool kit, hexagonal wrench kit, tester, craftsman knife, file, hacksaw, stainless steel right-angled tape measure, tape measure, threading, multi-functional electrician's belt bag, double claw glass suction cup, screwdriver 6 sets, plum blossom opening One-piece spanner, diagonal jaw pliers, pipe crimpers, wire strippers, vise, sharp-nosed pliers, hydraulic pliers, herringbone ladder, network cable clamp, network cable tester, anti-noise earplugs, safety belts, gloves, goggles, helmets, toolboxes, hole opener, quick F-clamp, multifunctional combination of angle ruler, magnet-absorbing bracelet, sandpaper sanding frame, PVC pipe cutter, torque socket wrench, soldering iron, cold press pliers, etc.