Low-carbon community new energy power supply system

Abstract

The invention relates to the related technical field of power supply systems, in particular to a low-carbon community new energy power supply system which comprises a photovoltaic panel power generation module, a pedal bicycle motion power generation module, an electric energy storage and distribution module and a central control mechanism. The pedal bicycle movement power generation module is used for recycling mechanical energy generated by pedal bicycle movement of community residents and converting the mechanical energy into electric energy, and the electric energy storage and distribution module is used for storing the electric energy generated by the photovoltaic panel power generation system and the pedal bicycle movement power generation system and reasonably distributing the electric energy according to community public electricity demands; the photovoltaic panel power generation system capable of automatically tracking the position of the sun is combined with the pedal bicycle motion power generation system, cooperative recycling of solar energy and motion mechanical energy is achieved, the limitation of single new energy power generation is made up, and the stability and continuity of community new energy power supply are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply systems, and in particular to a low-carbon community new energy power supply system. BACKGROUND

[0003] At present, the existing community new energy power supply mostly uses a photovoltaic panel power generation system alone, but the traditional photovoltaic panel is mostly fixedly installed and cannot be adjusted in real time according to the position of the sun, resulting in low utilization rate of solar radiation, and in particular in the morning, evening and seasonal changes, the power generation efficiency is greatly reduced. At the same time, a large amount of mechanical energy generated by the daily movement (such as fitness, leisure cycling) of the residents in the community is usually wasted and not effectively recycled. In addition, the single new energy power generation system has the problem of poor power supply stability, such as sudden drop in photovoltaic panel power generation capacity on cloudy days and at night, which is difficult to meet the continuous demand for community public power consumption.

[0004] In the related art, although the photovoltaic panel angle can be rotated following the movement of the sun by means of real-time detection of the solar position by a photosensitive element and adjustment of the photovoltaic panel angle by a motor, the function is relatively single and cannot be combined with the mechanical energy described above, which has certain limitations.

[0005] Therefore, there is an urgent need for a community power supply system that can combine multiple new energy power generation methods, improve energy collection efficiency and ensure power supply stability to solve the problems of the prior art. SUMMARY

[0006] The purpose of the present application is to provide a low-carbon community new energy power supply system, which combines a photovoltaic panel power generation system that automatically tracks the position of the sun with a pedal cycle exercise power generation system, realizes efficient recycling of solar energy and exercise mechanical energy, improves the efficiency and stability of community new energy power supply, meets the demand for community public power consumption, reduces dependence on traditional power grids and reduces carbon emissions to solve the problems raised in the background art.

[0007] The technical solution adopted by the present application is:

[0008] A low-carbon community new energy power supply system, comprising a photovoltaic panel power generation module, a pedal cycle exercise power generation module, an electric energy storage and distribution module and a central control mechanism, the photovoltaic panel power generation module is used to collect solar energy and convert it into electric energy, the pedal cycle exercise power generation module is used to recycle the mechanical energy generated by the pedal cycle exercise of community residents and convert it into electric energy, the electric energy storage and distribution module is used to store the electric energy generated by the photovoltaic panel power generation system and the pedal cycle exercise power generation system, and reasonably distribute it according to the demand for community public power consumption, and the central control mechanism is used to monitor, coordinate control and manage data of the entire new energy power supply system in real time.

[0009] Optionally, the photovoltaic panel power generation module comprises a photovoltaic panel array, a sun tracking device, a power generation control unit and a lightning protection mechanism, the photovoltaic panel array is installed on a community square roof, a parking lot roof, a green belt idle area and the like through a support in a sufficient light position, the sun tracking device is installed on each group of the photovoltaic panel power generation module, and is used for monitoring a sun position and adjusting an angle of the photovoltaic panel power generation module.

[0010] Optionally, the sun tracking device is composed of a double-shaft driving mechanism, a sun position sensor and an angle adjustment controller.

[0011] Optionally, the double-shaft driving mechanism is composed of a horizontal rotation assembly and a vertical pitch assembly, wherein the horizontal rotation assembly and the vertical pitch assembly are both driven by a stepping motor, and are used for driving the photovoltaic panel to rotate around a vertical shaft and to pitch around a horizontal shaft in sequence.

[0012] Optionally, the sun position sensor adopts a double-shaft sun tracking sensor.

[0013] Optionally, the power generation control unit is composed of a photovoltaic inverter and a direct current power distribution cabinet.

[0014] Optionally, the lightning protection mechanism is a lightning rod installed at a top end of a support where the photovoltaic panel array is located.

[0015] Optionally, the pedal bicycle exercise power generation module comprises a pedal bicycle body, a transmission mechanism, a generator, a rectification filtering module and an energy storage submodule, the pedal bicycle body is installed in a community fitness area and a leisure square, the rectification filtering module is composed of a rectification bridge and a filtering capacitor, the energy storage submodule is a lithium iron phosphate battery pack, one group of energy storage batteries corresponds to each pedal bicycle, the energy storage submodule is connected with an output end of the rectification filtering module, and is used for storing electric energy generated by the generator.

[0016] Optionally, the electric energy storage and distribution module comprises a main energy storage battery pack, a bidirectional inverter and a power distribution switch box, the main energy storage battery pack is a large-capacity lithium iron phosphate battery pack, the bidirectional inverter is a bidirectional grid-connected inverter, and the power distribution switch box is an outdoor rainproof power distribution box.

[0017] Optionally, the central control mechanism comprises: a central controller, a data acquisition module, a man-machine interface and a communication module, the central controller adopts an industrial-grade PLC, the model is Siemens S7-1200CPU 1214C, the data acquisition module is composed of a sensor and a data acquisition card, the sensor comprises a current sensor, a voltage sensor, a temperature sensor and an illumination intensity sensor, the man-machine interface is a touch screen, which is installed in a community property service center, and the communication module adopts a wireless communication unit and an Ethernet unit to realize the communication of the central controller with each subsystem and a remote monitoring platform.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] The present application combines the photovoltaic panel power generation system automatically tracking the sun position with the pedal bicycle exercise power generation system, realizes the collaborative recycling of solar energy and mechanical energy, makes up for the limitations of single new energy power generation, and improves the stability and sustainability of community new energy power supply.

[0020] 1. Photovoltaic panel automatic tracking technology: a dual-axis driven sun tracking device is adopted, combined with a high-precision sun position sensor and an intelligent controller, to realize real-time and accurate adjustment of the angle of the photovoltaic panel, compared with the traditional fixed photovoltaic panel, the solar radiation utilization rate is improved by 30%-50%, and the photovoltaic power generation efficiency is greatly improved.

[0021] 2. Efficient recovery of kinetic energy: the transmission ratio is optimized through a speed increasing gear set to improve the speed of the generator, so that the mechanical energy generated by the pedal bicycle exercise is efficiently converted into electrical energy, and an independent energy storage submodule is provided to ensure that the kinetic energy is not wasted, realizing the dual value of energy recovery and resident fitness.

[0022] 3. Intelligent collaborative control: based on the multi-parameter monitoring and preset logic of the central control system, the dynamic collaborative control of each subsystem is realized, the energy distribution strategy is adjusted in real time according to the factors such as light intensity, resident exercise participation, public power load, etc., the new energy is maximized, and the dependence on traditional power grid is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structural schematic diagram in the present application. DETAILED DESCRIPTION

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In view of the prior art, new energy power supply is usually provided by a photovoltaic panel power generation system, but the traditional photovoltaic panel is usually fixedly installed and cannot be adjusted in real time according to the position of the sun, resulting in low utilization rate of solar radiation, especially in the morning, evening and seasonal changes, the power generation efficiency is greatly reduced. At the same time, a large amount of mechanical energy generated by the daily movement of residents in the community (such as fitness and leisure cycling) is usually wasted and not effectively recycled. In addition, the single new energy power generation system has the problem of poor power supply stability, such as sudden drop in photovoltaic panel power generation capacity on cloudy days and at night, which is difficult to meet the continuous demand for community public power consumption. In the related art, although the photovoltaic panel angle can be adjusted by real-time detection of the sun's position by a photosensitive element and a motor, the function is relatively single and cannot be combined with the mechanical energy described above, which has certain limitations.

[0028] As shown in FIG. 1, the embodiment of the present application provides a low-carbon community new energy power supply system, which comprises a photovoltaic panel power generation module, a pedal bicycle exercise power generation module, an electric energy storage and distribution module and a central control mechanism. The photovoltaic panel power generation module is used to collect solar energy and convert it into electric energy. The pedal bicycle exercise power generation module is used to recycle the mechanical energy generated by the pedal bicycle exercise of community residents and convert it into electric energy. The electric energy storage and distribution module is used to store the electric energy generated by the photovoltaic panel power generation system and the pedal bicycle exercise power generation system, and reasonably distribute it according to the community public power consumption demand. The central control mechanism is used to monitor, coordinate control and manage the data of the entire new energy power supply system in real time. Figure 1 As shown in FIG. 1, the embodiment of the present application provides a low-carbon community new energy power supply system, which comprises a photovoltaic panel power generation module, a pedal bicycle exercise power generation module, an electric energy storage and distribution module and a central control mechanism. The photovoltaic panel power generation module is used to collect solar energy and convert it into electric energy. The pedal bicycle exercise power generation module is used to recycle the mechanical energy generated by the pedal bicycle exercise of community residents and convert it into electric energy. The electric energy storage and distribution module is used to store the electric energy generated by the photovoltaic panel power generation system and the pedal bicycle exercise power generation system, and reasonably distribute it according to the community public power consumption demand. The central control mechanism is used to monitor, coordinate control and manage the data of the entire new energy power supply system in real time.

[0029] Further, the photovoltaic panel power generation module comprises a photovoltaic panel array, a sun tracking device, a power generation control unit and a lightning protection mechanism, the photovoltaic panel array is installed on the roof of a community square, the roof of a parking lot, the idle area of a green belt or the like by a support in a well-illuminated position, the sun tracking device is installed on each group of the photovoltaic panel power generation module and is used for monitoring the position of the sun and adjusting the angle of the photovoltaic panel power generation module.

[0030] Specifically, the photovoltaic panel array is composed of a plurality of single-crystal silicon photovoltaic panels, each photovoltaic panel has a power of 300W-400W and a photoelectric conversion efficiency of not less than 23%, the photovoltaic panel array is installed on the roof of a community square, the roof of a parking lot, the idle area of a green belt or the like by a support in a well-illuminated position, the size of each photovoltaic panel is 1600mm×990mm×35mm, and the distance between adjacent photovoltaic panels is 500mm-800mm to avoid mutual shading and affect light absorption.

[0031] Further, the sun tracking device is composed of a double-shaft driving mechanism, a sun position sensor and an angle adjustment controller.

[0032] Further, the double-shaft driving mechanism is composed of a horizontal rotation assembly and a vertical pitch assembly, wherein the horizontal rotation assembly and the vertical pitch assembly are both driven by a stepping motor and are used to drive the photovoltaic panel to rotate around a vertical shaft and to pitch around a horizontal shaft, respectively.

[0033] Specifically, in the double-shaft driving mechanism, the stepping motor used in the horizontal rotation assembly is of the type 57HS22 and has a rated torque of 2.2N·m, which can drive the photovoltaic panel to rotate around the vertical shaft by 0-360°; the stepping motor used in the vertical pitch assembly is of the type 42HS08 and has a rated torque of 0.8N·m, which can drive the photovoltaic panel to pitch around the horizontal shaft by 0-90°. The transmission part of the driving mechanism adopts gear transmission, the gear modulus is 2, and the transmission ratio is 1:50, which ensures accurate and stable angle adjustment.

[0034] Further, the sun position sensor adopts a double-shaft sun tracking sensor.

[0035] Specifically, the sun position sensor is of the type TS-200, which can detect the azimuth and elevation angles of sunlight in real time, has a detection accuracy of ±0.1° and a working temperature range of -40℃-85℃, and is suitable for different climate environments in a community. The angle adjustment controller adopts an STM32F103C8T6 single-chip microcomputer as a control core, receives the azimuth and elevation angle signals transmitted by the sun position sensor, sends control instructions to the stepping motor of the double-shaft driving mechanism after data processing, and drives the photovoltaic panel to adjust the angle in real time, so that the photovoltaic panel always keeps perpendicular to the sunlight and maximizes the absorption of solar radiation energy.

[0036] Further, the power generation control unit is composed of a photovoltaic inverter and a direct current distribution cabinet.

[0037] Specifically, the photovoltaic inverter adopts a three-phase grid-connected inverter, the model is Solis-50K, the rated power is 50kW, the input voltage range is 200V-1000V, the output voltage is 380V / 220V, the conversion efficiency is not less than 98.5%, and the direct current generated by the photovoltaic panel can be converted into alternating current. The direct current distribution cabinet is used to collect the direct current output of each photovoltaic panel, and is equipped with protection elements such as direct current circuit breaker and lightning protection device to ensure the safe and stable operation of the direct current circuit.

[0038] Further, the lightning protection mechanism is a lightning rod installed at the top of the bracket where the photovoltaic panel array is located.

[0039] Specifically, the height of the lightning rod is 1.5m-2m higher than the photovoltaic panel array, and the lightning rod is made of galvanized steel pipe with a diameter of 50mm; at the same time, lightning protection devices are installed at the input and output ends of the photovoltaic inverter, the model is OBO V20-C / 3+NPE, which can effectively prevent damage to the system caused by lightning.

[0040] Further, the pedal exercise power generation module comprises a pedal exercise body, a transmission mechanism, a generator, a rectification and filtering module, and an energy storage submodule, the pedal exercise body is installed in the community fitness area and the leisure square, the rectification and filtering module is composed of a rectification bridge and a filtering capacitor, the energy storage submodule is a lithium iron phosphate battery pack, and each pedal exercise corresponds to a group of energy storage batteries, the energy storage submodule is connected with the output end of the rectification and filtering module, and is used to store the electric energy generated by the generator.

[0041] Specifically, the pedal exercise power generation module is used to recover the mechanical energy generated by the pedal exercise of community residents and convert it into electric energy.

[0042] Specifically, the pedal exercise body frame is welded by Q235 steel, the seat height is adjustable (the adjustment range is 700mm-900mm), the handlebar can rotate 360°, and is equipped with a brake device and a non-slip pedal to ensure the safety and comfort of residents' exercise. The number of pedal exercise bodies is configured according to the number of community residents, 10-15 pedal exercises are configured for every 500 residents, and are installed in the community fitness area, leisure square and other areas where residents are densely distributed.

[0043] Specifically, the transmission mechanism includes a chain wheel, a chain, a flywheel and a speed-up gear set. A resident pedals the pedal plate to drive the chain wheel to rotate, the chain wheel drives the flywheel to rotate through the chain, the flywheel is connected with the input end of the speed-up gear set, the transmission ratio of the speed-up gear set is 1:10-1:15, the low-speed rotation of the flywheel can be converted into high-speed rotation and transmitted to the input shaft of the generator to improve the power generation efficiency of the generator. The chain of the transmission mechanism is made of stainless steel and is subjected to galvanizing treatment on the surface to reduce wear and corrosion; the gear set is made of 45 steel and has a gear precision of 6 levels to ensure stable transmission and low noise.

[0044] Specifically, the generator is a permanent magnet synchronous generator with a model of YLS-1.5, a rated power of 1.5 kW, a rated speed of 1500 r / min, a rated voltage of 220 V (DC) and an efficiency of not less than 88%. When the transmission mechanism drives the input shaft of the generator to rotate, the permanent magnet rotor inside the generator cuts the stator winding to generate induced electromotive force and outputs DC power. The generator shell is made of aluminum alloy and has good heat dissipation performance to meet the long-time operation requirement.

[0045] Specifically, the rectification and filtering module is composed of a rectification bridge and a filtering capacitor. The rectification bridge is composed of four rectification diodes with a model of KBPC3510 to form a bridge rectification circuit, rectify the AC power output by the generator (if the generator is an AC output type, the rectification process needs to be clarified; in this scheme, the generator is a DC output type, and this module is mainly used to stabilize the voltage), and then filter out the voltage ripple through the filtering capacitor (with a model of CD60, a capacity of 1000 μF and a withstand voltage of 450 V) to output stable DC power.

[0046] Specifically, the energy storage submodule adopts a lithium iron phosphate battery pack, one set of energy storage battery is arranged for each pedal bike, the battery pack has a capacity of 12 V / 100 Ah, a cycle life of not less than 2000 times and a working temperature range of -20℃-60℃. The energy storage submodule is connected with the output end of the rectification and filtering module and is used to store the power generated by the generator. When the community public power demand increases or the photovoltaic panel power generation is insufficient, the power can be released to supplement the power supply.

[0047] Further, the power storage and distribution module comprises a main energy storage battery pack, a bidirectional inverter and a power distribution switch box. The main energy storage battery pack is a large-capacity lithium iron phosphate battery pack, the bidirectional inverter is a bidirectional grid-connected inverter, and the power distribution switch box is an outdoor rainproof power distribution box.

[0048] Specifically, the total capacity of the main energy storage battery pack is 500kWh-1000kWh, and the capacity is determined according to the community public power load (such as street lamps, monitoring, public toilet lighting, community activity center appliances, etc., and the daily public power consumption of a medium-sized community is usually 200kWh-500kWh). The battery pack adopts a modular design, and each battery module has a capacity of 50kWh, which is convenient for installation, maintenance and expansion. The battery pack is equipped with a battery management system (BMS) with a model of JK-BMS-500V, which can monitor the voltage, current, temperature, SOC (State of Charge) and other parameters of the battery in real time, prevent overcharging, overdischarging and overtemperature of the battery, and prolong the service life of the battery.

[0049] Specifically, the bidirectional inverter has a model of GoodWe-100K, a rated power of 100kW, an input voltage range of 400V-800V, an output voltage of 380V / 220V, and a conversion efficiency of not less than 98%. The bidirectional inverter has two working modes of rectification and inversion: when the photovoltaic panel power generation system and the pedal bicycle motion power generation system generate sufficient power, the inverter works in the rectification mode to convert alternating current (or direct current after processing) into direct current and store it in the main energy storage battery pack; when the community public power demand increases or the power generation system output is insufficient, the inverter works in the inversion mode to convert the direct current of the main energy storage battery pack into alternating current and deliver it to the community public power network.

[0050] Specifically, the distribution switch box is made of stainless steel and has a protection level of IP65. The distribution box is equipped with a total circuit breaker, branch circuit breakers, and a leakage protector, etc. The total circuit breaker has a rated current of 250A, and the branch circuit breakers are configured according to the power of each public power equipment (such as a street lamp circuit breaker with a rated current of 10A and a monitoring circuit breaker with a rated current of 5A). The distribution switch box distributes the power output by the bidirectional inverter to each public power equipment in the community, and has overload, short circuit and leakage protection functions to ensure the safety of power consumption.

[0051] Further, the central control mechanism comprises a central controller, a data acquisition module, a human-computer interaction interface and a communication module. The central controller is an industrial-grade PLC with a model of Siemens S-CPU C. The data acquisition module is composed of sensors and a data acquisition card. The sensors include current sensors, voltage sensors, temperature sensors and light intensity sensors. The human-computer interaction interface is a touch screen installed in the community property service center. The communication module uses a wireless communication unit and an Ethernet unit to realize communication between the central controller and each subsystem and the remote monitoring platform.

[0052] Specifically, the central controller has 14 digital inputs, 10 digital outputs, 2 analog inputs, and 1 analog output interface, which can meet the system's multiple parameter control requirements. The central controller pre-stores control programs, which can coordinate the control of each subsystem according to the preset logic (such as community public power load curve, photovoltaic panel power generation efficiency curve, energy storage battery SOC value, etc.). For example, when the SOC value of the main energy storage battery group is higher than 90%, the power supply to the energy storage battery group from the photovoltaic panel power generation system is reduced, and the public power equipment is directly powered; when the SOC value is lower than 20%, the incentive measures of the pedal bicycle power generation system are increased (such as prompting residents to participate in sports power generation through the human-machine interface), and if the photovoltaic panel power generation is insufficient, it can automatically switch to grid-connected power supply with traditional power grid (only used in emergency, priority to new energy power supply).

[0053] Specifically, the data acquisition module is composed of various sensors and data acquisition cards. The sensors include current sensors (model ACS712, measurement range 0-50A), voltage sensors (model LV25-P, measurement range 0-250V), temperature sensors (model DS18B20, measurement range -55℃-125℃), and light intensity sensors (model BH1750, measurement range 0-65535lx). The data acquisition card uses Advantech USB-4711, which has 16 analog input channels with a sampling rate of 100kS / s. It can real-time collect the output current, voltage, and light intensity of the photovoltaic panel power generation system, the power generation current and voltage of the pedal bicycle power generation system, the voltage, current, temperature, and SOC value of the main energy storage battery group, and the real-time load of the community public power equipment, and transmit the data to the central controller.

[0054] Specifically, the human-computer interaction interface uses a 10-inch touch screen, model Weilong MT8102iE, installed in the community property service center. The touch screen can real-time display the running parameters of each subsystem (such as photovoltaic panel power generation power, pedal bicycle power generation power, energy storage battery SOC value, public power load, etc.), system running state (normal, fault, standby, etc.), and support manual operation by staff, such as setting photovoltaic panel tracking accuracy, adjusting energy storage battery charge and discharge threshold, starting / stopping a subsystem, etc. In addition, the touch screen also has a fault alarm function. When the system fails (such as photovoltaic panel inverter failure, energy storage battery over-temperature, generator abnormality, etc.), an alarm prompt will pop up and a sound will be emitted, and the fault location and reason will be displayed, which is convenient for staff to timely troubleshoot and repair.

[0055] Specifically, the communication module adopts a 4G / 5G wireless communication module (model SIM7600CE) and an Ethernet module (model CP1243-1) to realize communication between the central controller and each subsystem and the remote monitoring platform. Staff can remotely view the system running status and receive fault alarm information through a mobile phone APP or a computer client, and can also remotely issue control instructions, such as adjusting the tracking angle of the photovoltaic panel and controlling the charging and discharging of the energy storage battery, to improve the convenience of system management.

[0056] Working principle:

[0057] 1. Energy collection stage:

[0058] In the photovoltaic panel power generation system that automatically tracks the position of the sun, a solar position sensor detects the azimuth and elevation angles of the sun in real time and transmits signals to an angle adjustment controller. The controller drives a double-shaft driving mechanism to adjust the angle of the photovoltaic panel, so that the photovoltaic panel is always perpendicular to the sunlight, maximizing the absorption of solar energy. The photovoltaic panel converts solar energy into direct current, which is collected by a direct current distribution cabinet and then transmitted to a photovoltaic inverter of the power generation control unit. The inverter converts the direct current into alternating current.

[0059] In the pedal exercise power generation system, residents pedal the pedals to drive the chain wheel to rotate, which drives the flywheel and speed-up gear set to rotate through the chain. The speed-up gear set drives the input shaft of the generator to rotate at high speed, and the generator converts mechanical energy into direct current. After filtering by a rectification and filtering module, part of the direct current is directly transmitted to the community public power network, and the other part is transmitted to the energy storage submodule for storage.

[0060] 2. Energy storage and distribution stage:

[0061] The alternating current output by the photovoltaic inverter and the direct current (converted into alternating current by a bidirectional inverter) after rectification and filtering of the pedal exercise power generation system are collected and transmitted to the electric energy storage and distribution system. The central control system monitors the community public power load and the SOC value of the main energy storage battery pack in real time through a data acquisition module. If the public power load is less than the total power generation capacity and the SOC value of the main energy storage battery pack is lower than 90%, the bidirectional inverter works in rectification mode to convert excess power into direct current and store it in the main energy storage battery pack. If the public power load is greater than the total power generation capacity or the SOC value of the main energy storage battery pack is higher than 90%, the bidirectional inverter works in inversion mode (or direct power supply mode) to preferentially distribute power to public power equipment to meet power demand.

[0062] 3. Cooperative control stage:

[0063] During the day when the light is sufficient, the photovoltaic panel power generation system that automatically tracks the position of the sun is the main power source, and the pedal exercise power generation system is the auxiliary power source. The two systems together meet the community public power demand, and the excess power is stored in the main energy storage battery pack.

[0064] When the light is dim on cloudy days or in the evening, the photovoltaic panel's power generation efficiency decreases. The central control system prompts residents to participate in the pedal cycle exercise to generate electricity through the human-computer interaction interface, and simultaneously starts the main energy storage battery pack to discharge to make up for the power supply gap.

[0065] At night without light, the photovoltaic panel power generation system stops working, and the pedal cycle exercise power generation system and the main energy storage battery pack jointly supply power to the community public power equipment (such as street lamps, monitoring, and other necessary power equipment at night);

[0066] When the SOC value of the main energy storage battery pack is lower than 20% and the photovoltaic panel power generation is insufficient and the pedal cycle exercise power generation contribution is small, the central control system automatically switches to grid-connected power supply with the traditional power grid (only as an emergency backup to avoid long power outages), and simultaneously sends out an alarm prompt to remind the staff to take measures (such as organizing community residents to participate in exercise power generation, checking whether the photovoltaic panel system is malfunctioning, etc.).

[0067] 4. Implementation case

[0068] (I) System installation and debugging

[0069] Installation of photovoltaic panel power generation system with automatic sun position tracking:

[0070] Select the community square roof (area about 500㎡) and parking lot canopy (area about 1000㎡) as the photovoltaic panel installation area, clean the installation site, and ensure that the ground is flat and the bearing capacity meets the requirements (the roof bearing capacity is not less than 200kg / ㎡, and the parking lot canopy bearing capacity is not less than 150kg / ㎡);

[0071] Install the photovoltaic panel support, which is made of aluminum alloy and is fixed on the roof or canopy structure through expansion bolts. The support height is 300mm-500mm to facilitate ventilation and heat dissipation;

[0072] Install the photovoltaic panel array, fix the monocrystalline silicon photovoltaic panel (power 350W, size 1650mmx992mmx35mm) on the support, and ensure that there is no obstruction between adjacent photovoltaic panels with a spacing of 600mm;

[0073] Install the sun tracking device, install the double-shaft driving mechanism (step motor 57HS22 and 42HS08) and the sun position sensor (TS-200) on the back of each photovoltaic panel, and connect the angle adjustment controller (STM32F103C8T6);

[0074] Install the power generation control unit and lightning protection module, install the photovoltaic inverter (Solis-50K) and DC power distribution cabinet in the community power distribution room, install the lightning rod on the top of the photovoltaic panel support, and install the lightning protector (OBO V20-C / 3+NPE) at the input and output ends of the inverter.

[0075] Debugging photovoltaic panel tracking function: start the sun tracking device, simulate the sun position at different times through the sun position sensor, observe whether the angle adjustment of the photovoltaic panel is accurate, and ensure that the tracking error is less than 0.5°; at the same time, test the conversion efficiency of the photovoltaic inverter, and ensure that the output voltage and frequency meet the community public power standard (380V / 50Hz, 220V / 50Hz).

[0076] Pedal bicycle exercise power generation system installation:

[0077] Divide the pedal bicycle installation area in the community fitness area (about 200㎡), pour the concrete foundation (thickness 100mm, strength grade C30), and reserve the fixing bolt hole;

[0078] Install the pedal bicycle body (12 in total), fix the bicycle frame on the concrete foundation through the fixing bolt, and adjust the seat height to a position suitable for most residents (default 800mm);

[0079] Install the transmission mechanism and generator: install the chain wheel, chain, flywheel, and speed-up gear set (transmission ratio 1:12) inside the bicycle frame to ensure smooth transmission; fix the permanent magnet synchronous generator (YLS-1.5) at the rear of the bicycle, and connect the speed-up gear set output shaft through the shaft coupling;

[0080] Install the rectifier filter module and energy storage submodule: install a waterproof box on the side of the bicycle frame, and install the rectifier bridge (KBPC3510), filter capacitor (CD601000μF / 450V), and lithium iron phosphate battery pack (12V / 100Ah) inside, and connect the generator output end;

[0081] Debug the exercise power generation function: arrange staff to pedal the bicycle, monitor the generator output parameters through the current sensor and voltage sensor, and ensure that when the bicycle moves at a normal riding speed (3m / s-5m / s), the generator output power reaches 1kW-1.2kW, the rectified and filtered voltage stabilizes at 12V-14V, and the energy storage submodule charges normally.

[0082] Electric energy storage and distribution system and central control system installation:

[0083] Install the main energy storage battery pack (total capacity 800kWh, composed of 16 50kWh battery modules), bidirectional inverter (GoodWe-100K), and power distribution switch box in the community power distribution room, connect the main energy storage battery pack and bidirectional inverter through the cable, connect the bidirectional inverter output end to the power distribution switch box, and connect the power distribution switch box output end to the community public power equipment (50 street lamps, 20 surveillance cameras, 10 public toilet lighting sets, and some community activity center electrical appliances) through the cable;

[0084] Install the central control system: Install the central controller (Siemens S7-1200), data acquisition card (Advantech USB-4711), and communication module (SIM7600CE and CP1243-1) in the control cabinet of the power distribution room, and connect each sensor (current, voltage, temperature, and light intensity sensor) with each subsystem controller.

[0085] Install the human-machine interface: Install the touch screen (Wilon MT8102iE) in the community property service center and connect it with the central controller through Ethernet.

[0086] Overall system debugging: Start the central control system, test whether the data acquisition module can accurately collect the operating parameters of each subsystem, and whether the human-machine interface can display the data in real time. Simulate different scenarios (such as sunny, cloudy, night, high power load, and low power load) to test whether the central controller can adjust the energy distribution strategy according to the preset logic to ensure that each subsystem works normally and the power supply is stable.

[0087] (II) System operation and maintenance

[0088] Daily operation:

[0089] The staff monitors the system operation status in real time through the human-machine interface or remote monitoring platform, records the photovoltaic panel power generation power, pedal bike power generation power, main energy storage battery SOC value, public power load, and other data daily, and analyzes the system operation efficiency.

[0090] Regularly check the transmission mechanism of the pedal bike motion power generation system. If problems such as loose chain and worn gear are found, adjust or replace the parts in time. Check whether the photovoltaic panel surface is dusty or stained, clean it 1-2 times a month to ensure the light transmittance of the photovoltaic panel.

[0091] When the system fails, the central control system automatically sends an alarm prompt. The staff checks the fault cause according to the alarm information, such as checking whether the input voltage and current are normal if the photovoltaic inverter fails, checking whether the heat dissipation device is damaged if the energy storage battery overheats, and replacing the faulty parts in time.

[0092] Regular maintenance:

[0093] Maintain the photovoltaic panel power generation system that automatically tracks the sun's position every quarter: Check the running status of the stepper motor of the double-axis drive mechanism and add lubricating oil; calibrate the sun position sensor to ensure detection accuracy; test the performance of the lightning protection module to ensure that the lightning protection function is normal.

[0094] Maintain the generator and energy storage submodule of the pedal bike motion power generation system every half year: Check the winding insulation resistance of the generator to ensure good insulation performance; detect the battery capacity of the energy storage submodule. If the capacity attenuation exceeds 20%, replace the battery in time.

[0095] Every year, the power storage and distribution system, central control system are maintained comprehensively: detecting the BMS function of the main energy storage battery pack, updating the control program; checking the conversion efficiency of the bidirectional inverter, performing parameter calibration; testing the communication stability of the communication module, ensuring the normal function of remote monitoring.

[0096] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for the purpose of limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement of the technical solutions described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included within the scope of the present application.

Claims

1. A low-carbon community new energy power supply system, characterized in that, The application relates to a new energy power supply system for a community, which comprises photovoltaic panel power generation modules, foot-pedal bicycle exercise power generation modules, an electric energy storage and distribution module and a central control mechanism, wherein the photovoltaic panel power generation modules are used for collecting solar energy and converting the solar energy into electric energy; the foot-pedal bicycle exercise power generation modules are used for recycling mechanical energy generated by community residents' foot-pedal bicycle exercises and converting the mechanical energy into electric energy; the electric energy storage and distribution module is used for storing electric energy generated by the photovoltaic panel power generation system and the foot-pedal bicycle exercise power generation system and reasonably distributing the electric energy according to community public power consumption demands; and the central control mechanism is used for real-time monitoring, coordinated control and data management of the whole new energy power supply system.

2. The low-carbon community new energy power supply system according to claim 1, characterized in that, The photovoltaic panel power generation module comprises a photovoltaic panel array, a sun tracking device, a power generation control unit and a lightning protection mechanism; the photovoltaic panel array is installed on a community square roof, a parking lot roof, a green belt idle area and the like through a support in a light sufficient position; the sun tracking device is installed on each set of the photovoltaic panel power generation module and is used for monitoring a sun position and adjusting an angle of the photovoltaic panel power generation module.

3. The low-carbon community new energy power supply system according to claim 2, characterized in that, The sun tracking device is composed of a double-shaft driving mechanism, a sun position sensor and an angle adjusting controller.

4. The low-carbon community new energy power supply system according to claim 3, characterized in that, The double-shaft driving mechanism is composed of a horizontal rotation component and a vertical pitching component; the horizontal rotation component and the vertical pitching component are both driven by a stepping motor and are used for driving the photovoltaic panel to rotate around a vertical shaft and to pitch around a horizontal shaft.

5. The low-carbon community new energy power supply system according to claim 3, characterized in that, The sun position sensor adopts a double-shaft sun tracking sensor.

6. The low-carbon community new energy power supply system according to claim 2, characterized in that, The power generation control unit is composed of a photovoltaic inverter and a direct current distribution cabinet.

7. The low-carbon community new energy power supply system according to claim 2, characterized in that, The lightning protection mechanism is a lightning rod which is installed at the top of the support where the photovoltaic panel array is arranged.

8. The low-carbon community new energy power supply system according to claim 1, characterized in that, The foot-pedal bicycle exercise power generation module comprises a foot-pedal bicycle body, a transmission mechanism, a generator, a rectification filtering module and an energy storage sub-module; the foot-pedal bicycle body is installed in a community fitness area and a leisure square; the rectification filtering module is composed of a rectification bridge and a filtering capacitor; the energy storage sub-module is a lithium iron phosphate battery group, and each foot-pedal bicycle corresponds to a group of energy storage batteries; the energy storage sub-module is connected with an output end of the rectification filtering module and is used for storing electric energy generated by the generator.

9. The low-carbon community new energy power supply system according to claim 1, characterized in that, The electric energy storage and distribution module comprises a main energy storage battery group, a bidirectional inverter and a power distribution switch box; the main energy storage battery group is a large-capacity lithium iron phosphate battery group; the bidirectional inverter is a bidirectional grid-connected inverter; and the power distribution switch box is an outdoor rainproof power distribution box.

10. The low-carbon community new energy power supply system according to claim 1, characterized in that, The central control mechanism comprises a central controller, a data acquisition module, a man-machine interaction interface and a communication module; the central controller adopts an industrial-grade PLC, and the model is Siemens S7-1200 CPU 1214C; the data acquisition module is composed of sensors and a data acquisition card; the sensors comprise current sensors, voltage sensors, temperature sensors and light intensity sensors; the man-machine interaction interface is a touch screen which is installed in a community property service center; and the communication module adopts a wireless communication unit and an Ethernet unit to realize communication of the central controller with each subsystem and a remote monitoring platform.

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