CN211908382U - Join in marriage and become dynamic increase volume light and store up integrated device - Google Patents

Join in marriage and become dynamic increase volume light and store up integrated device Download PDF

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Publication number
CN211908382U
CN211908382U CN202020871585.5U CN202020871585U CN211908382U CN 211908382 U CN211908382 U CN 211908382U CN 202020871585 U CN202020871585 U CN 202020871585U CN 211908382 U CN211908382 U CN 211908382U
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power converter
power
integrated device
module
grid
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CN202020871585.5U
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Inventor
余斌
万代
黎刚
朱光明
欧阳帆
朱维钧
梁文武
许立强
臧欣
李理
严亚兵
徐浩
洪权
李刚
熊尚峰
吴晋波
刘海峰
李辉
徐波
陶莉
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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Abstract

The utility model discloses a distribution transformer dynamic capacity-increasing light storage integrated device, which comprises a central monitoring component, a light storage component, a power converter and an external auxiliary device; the optical storage assembly, the power converter and the external auxiliary equipment are in communication connection with the central monitoring system; the light storage assembly and the external auxiliary equipment are connected with the power converter, and the external auxiliary equipment is used for being connected to a 380V main line of the power distribution area. The utility model provides a join in marriage and become developments increase-volume light and store up integrated device, in meeting peak degree summer or spring festival load power consumption peak period, through inserting the device peak clipping fill-up, realize joining in marriage and become developments increase-volume, can effectively improve and join in marriage and become transshipping, circuit overload, platform district low voltage, the unbalanced three phase condition of load, reduce platform district line loss, improve operation economy, improve distribution network power supply reliability.

Description

Join in marriage and become dynamic increase volume light and store up integrated device
Technical Field
The utility model relates to an electric control field especially relates to a join in marriage and become developments increase volume light and store up integrated device.
Background
Along with economic development and social progress of China, the electricity consumption of industrial and agricultural production and civil use is also rising year by year, the electricity demand is in a diversified trend, and the power supply requirement for the power department is higher and higher. In many rural power grid areas covered by national grid companies, the guarantee of power supply remains a significant problem due to the weakness of the local grid structure. Particularly, the annual power utilization load rate is low, the peak power utilization is periodic or seasonal, and the peak load is prominent in a specific period, so that distribution transformation of a transformer area, line overload, low voltage of a user and incapability of guaranteeing the power supply capacity are frequently caused.
How to solve the problem of heavy overload operation of the distribution transformer, avoid equipment accidents, and improve the power supply quality, the power supply reliability and the high-quality service level is very important.
SUMMERY OF THE UTILITY MODEL
The utility model provides a join in marriage and become developments increase appearance light and store up integrated device for solve distribution network seasonal load peak period's distribution transformer overload, circuit overload and user low-voltage's problem.
A distribution transformer dynamic capacity-increasing optical storage integrated device comprises a central monitoring component, an optical storage component, a power converter and an external auxiliary device;
the optical storage assembly, the power converter and the external auxiliary equipment are in communication connection with the central monitoring system; the light storage assembly and the external auxiliary equipment are connected with the power converter, and the external auxiliary equipment is used for being connected to a 380V main line of the power distribution area.
Furthermore, the optical storage assembly comprises a photovoltaic assembly, an energy storage battery, a battery management module and a high-voltage box, wherein the photovoltaic assembly and the energy storage battery are both connected to the direct current side of the power converter through the high-voltage box, the battery management module is connected with the energy storage battery,
further, the energy storage battery is composed of a plurality of lithium batteries, and the total output voltage of the energy storage battery is 200-400V.
Furthermore, the central monitoring comprises a microprocessor, a communication module and a switch which are connected in sequence; the communication module is provided with an RS485 communication interface and an Ethernet port, and the switch is provided with a 4G module, a WIFI networking module and the Ethernet port. The communication module is communicated with the optical storage assembly, the power converter, the external auxiliary equipment and the switch through an RS485 communication interface, and an Ethernet port of the communication module is in standby configuration; the 4G module is used for communicating with a power distribution main station, timely uploading state information of the optical storage integrated device, receiving a control command of the power distribution main station and realizing remote monitoring; and the WIFI networking module and the Ethernet port are used for debugging the device.
Furthermore, the power converter comprises a bidirectional converter and a controller connected with the bidirectional converter, the central monitoring device is connected with the controller and controls the starting, stopping and working modes of the bidirectional converter, the controller receives a control command of the central monitoring device to control the bidirectional converter, and the bidirectional converter can realize DC/DC conversion and DC/AC conversion. The power converter can work in a grid-connected mode or an off-grid mode, and split-phase current control can be realized.
Further, the external auxiliary equipment comprises a grid-connected circuit breaker, a grid-connected cable, an HPLC module and a switching power supply; the grid-connected circuit breaker and the switch power supply are connected to the alternating current side of the power converter, the grid-connected circuit breaker is connected to a 380V main line of a power distribution area through the grid-connected cable, and the HPLC module is connected to the grid-connected cable in series; the microprocessor, the switch, the battery management module and the power converter are all connected with the switching power supply. The HPLC module adopts a power carrier communication technology and is communicated with the HPLC module of the district transformer comprehensive distribution box to obtain the real-time district load rate.
Furthermore, the external auxiliary equipment also comprises a smoke detector, a temperature and humidity sensor, a door magnetic switch, an air conditioner and a cooling fan; the smoke detector, the temperature and humidity sensor and the door magnetic switch are all connected with the switching power supply, and the air conditioner and the cooling fan are all connected to the alternating current side of the power converter. The switch power supply takes electricity from the alternating current side of the power converter to supply power for the microprocessor, the switch, the battery management module, the power converter, the smoke detector, the temperature and humidity sensor and the door magnetic switch.
The energy storage battery box comprises an energy storage battery cabin and a main control cabin which are divided by a heat insulation plate; energy storage battery, battery management module, high-voltage box, air conditioner, smoke detector set up in the energy storage battery cabin, central monitoring, power converter, the circuit breaker that is incorporated into the power networks, the cable that is incorporated into the power networks, HPLC module, switching power supply, temperature and humidity sensor, radiator fan set up in the main control cabin, the door magnetic switch is installed on the cabinet door of box. The smoke detector, the temperature and humidity sensor, the cooling fan and the air conditioner are used for monitoring and adjusting the internal environment of the device box body; the door magnetic switch is used for carrying out protection and alarm of the access control system.
Furthermore, the photovoltaic module is arranged at the top of the box body and used for photovoltaic power generation to provide electric energy for a power grid, and the inclination angle of the photovoltaic module is determined according to actual lighting.
Furthermore, the battery management module, the power converter, the grid-connected circuit breaker, the smoke detector, the temperature and humidity sensor and the door magnetic switch are all in communication connection with the microprocessor in an RS485 communication mode.
The working principle and the process of the distribution transformation dynamic capacity-increasing light storage integrated device are as follows.
The central monitoring module issues a power converter charging and discharging command according to the platform area load information acquired by the HPLC module, and controls the storage and release of energy of the energy storage battery;
when the energy storage battery does not work, the central monitoring control is switched to the photovoltaic module to generate electricity to provide electric energy for the power grid;
when the central control receives the abnormal alarm of the battery management module, the power converter and the smoke detector, the control device is switched to a standby state or a stop state, and an alarm signal of the device is sent;
and the central monitor controls the working modes of the air conditioner and the cooling fan according to the information of the temperature and humidity sensor.
Has the advantages that:
the utility model provides a join in marriage and become developments increase appearance light and store up integrated device, the device itself both can regard as the power, can regard as the load again. According to the power consumption requirements and power consumption characteristics of users in different time periods, the device is charged in the power consumption valley period, and is discharged according to the real-time requirements of user loads in the power consumption peak period, so that the power supply capacity is increased locally. During peak period of load power utilization in summer or spring festival, the peak clipping and valley filling are connected to realize dynamic capacity increasing of distribution transformer, so that the conditions of distribution transformer overload, line overload, low voltage of transformer area and unbalanced three phases of load can be effectively improved, the line loss of transformer area is reduced, the operation economy is improved, and the power supply reliability of a power distribution network is improved. During the non-load power utilization peak period, the system can be used for temporary power supply, emergency power protection, uninterrupted power operation and the like.
Drawings
Fig. 1 is a schematic structural diagram of a distribution-transformation dynamic capacity-increasing optical storage integrated device provided by an embodiment of the present invention;
fig. 2 is a front view of the internal layout of a box body of a distribution-transformation dynamic capacity-increasing light-storage integrated device provided by an embodiment of the present invention;
fig. 3 is an electrical connection diagram of a distribution transformer dynamic capacity-increasing optical storage integrated device provided by an embodiment of the present invention;
fig. 4 is a communication connection diagram of a distribution transformation dynamic capacity-increasing optical storage integrated device provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
In this embodiment, a distribution and transformation dynamic capacity-increasing light-storage integrated device with a power/capacity of 15kW/60kWh is described as an example, considering a certain margin for seasonal long-term (4-6 hours) overload of a rural power grid main flow 50kVA distribution and transformation.
As shown in fig. 1, the present embodiment provides a distribution transformation dynamic capacity-increasing optical storage integrated device, which includes a central monitoring unit 1, an optical storage assembly 2, a power converter 3, and an external auxiliary device 4;
the optical storage assembly 2, the power converter 3 and the external auxiliary equipment 4 are all in communication connection with the central monitoring unit 1; the light storage assembly 2 and the external auxiliary device 4 are both connected with the power converter 3, and the external auxiliary device 4 is used for being connected to a 380V main line of a power distribution area.
Specifically, referring to fig. 1 to 4, the central monitoring unit 1 includes a microprocessor, a communication module, and a switch, which are connected in sequence; the communication module is provided with an RS485 communication interface and an Ethernet port, and the switch is provided with a 4G module, a WIFI networking module and the Ethernet port. The microprocessor can adopt an AM335X microprocessor based on an ARM Cortex-A8 kernel, and comprises functions of real-time data acquisition, data processing, alarm management, energy management, communication with a remote monitoring system and the like; and monitoring, energy management, security monitoring, operation control and configuration of system operation strategies are performed downwards, and the online maintenance of the system is completed. The state information of the device is uploaded upwards through the 4G module and can be controlled remotely. The communication module is communicated with the optical storage assembly 2, the power converter 3, the external auxiliary equipment 4 and the switch through an RS485 communication interface, and an Ethernet port of the communication module is in standby configuration; the 4G module is used for communicating with a power distribution main station, timely uploading state information of the optical storage integrated device, receiving a control command of the power distribution main station and realizing remote monitoring; and the WIFI networking module and the Ethernet port are used for debugging the device.
The optical storage assembly 2 comprises a photovoltaic assembly 21, an energy storage battery 22, a battery management module 23 and a high-voltage box 24, wherein the photovoltaic assembly 21 and the energy storage battery 22 are both connected to the direct current side of the power converter 3 through the high-voltage box 24 and a direct current contactor, the battery management module 23 is connected with the energy storage battery 22,
in this embodiment, the photovoltaic module 21 is a polysilicon solar panel with a rated power of 250W and a working voltage of 36V. The energy storage battery 22 is composed of a plurality of lithium batteries, the energy storage battery 22 specifically adopts a single 3.2V lithium iron phosphate battery, is formed by connecting a plurality of batteries PACK in series, integrally forms a battery cluster (energy storage battery), the total output voltage of the energy storage battery is 200-400V, and a mode of combining constant current charging and constant voltage charging is adopted. The battery management module 23 adopts a two-stage architecture of BMU and BCU, and the BMU is responsible for battery cell and battery PACK management and integrates functions of information acquisition, equalization, information uploading, heat management and the like of each battery cell. The BCU is responsible for managing all BMUs in a battery cluster, has the functions of current collection, total voltage collection, insulation resistance detection, SOC estimation and the like of the battery cluster, and drives and disconnects the direct current contactor when the state of the energy storage battery is abnormal, so that the battery cluster is withdrawn from operation, and the use safety of the energy storage battery is guaranteed.
The Power Converter (PCS)3 comprises a bidirectional converter and a controller connected with the bidirectional converter, the central monitoring unit 1 is connected with the controller and controls the start, stop and working mode of the controller, the controller receives a control command of the central monitoring unit 1 to control the bidirectional converter, and the bidirectional converter can realize DC/DC conversion and DC/AC conversion. The power converter automatically follows the power grid to be synchronous, DC/DC and AC/DC conversion is realized, the input range of a direct current side meets 30-800V DC, 380AC 50Hz is output, charging and discharging are carried out on the optical storage assembly 2, grid-connected power factor and electric energy quality requirements are met, a grid-connected and independent inversion working mode is provided, active regulation, reactive regulation, three-phase imbalance and harmonic suppression capability are provided, functions of over/under voltage protection, over/under frequency protection, phase sequence or polarity error protection, direct current input overload protection, output short circuit protection, anti-islanding protection, over-temperature protection, lightning protection, insulation detection and the like are provided, and an external communication interface is provided. In practice, the existing power converter meeting the above requirements can be selected according to the above functions, and the implementation scheme of the power converter is not described herein again.
The external auxiliary equipment 4 comprises a grid-connected circuit breaker, a grid-connected cable 42, an HPLC module 41, a switching power supply, a smoke detector, a temperature and humidity sensor, a door magnetic switch, an air conditioner, a cooling fan, a socket and a distribution box 43; the grid-connected circuit breaker and the switch power supply are connected to the alternating current side of the power converter, the grid-connected circuit breaker is arranged in the distribution box 43, the grid-connected circuit breaker is connected to a 380V main line of a distribution area through the grid-connected cable 42, and the HPLC module 41 is connected to the grid-connected cable 42 in series; the microprocessor, the switch, the battery management module 23 and the power converter are all connected with the switching power supply. The HPLC module 41 employs a power carrier communication technology, and communicates with the HPLC module of the distribution box to obtain a real-time distribution area load rate. The smoke detector, the temperature and humidity sensor and the door magnetic switch are all connected with the switching power supply, and the air conditioner, the cooling fan and the socket are all connected to the alternating current side of the power converter. The device can realize distribution network access, load information acquisition, fault isolation, environment monitoring, auxiliary power supply and system protection. The grid-connected circuit breaker is provided with overcurrent protection and leakage protection, and the grid-connected cable is connected with the distribution line through a parallel groove clamp. The switch power supply takes electricity from the alternating current side of the power converter to supply power for the microprocessor, the switch, the battery management module, the power converter, the smoke detector, the temperature and humidity sensor and the door magnetic switch.
As shown in fig. 2, the energy storage battery box further comprises a box body 5, wherein the box body 5 comprises an energy storage battery compartment and a main control compartment which are divided by a heat insulation board 51; energy storage battery 22, battery management module 23, high-voltage box 24, air conditioner, smoke detector set up in the energy storage battery cabin, central monitoring 1, power converter 3, the circuit breaker that is incorporated into the power networks, the cable 42 that is incorporated into the power networks, HPLC module 41, switching power supply, temperature and humidity sensor, radiator fan set up in the main control cabin, the door magnetic switch is installed on the cabinet door of box 5. The smoke detector, the temperature and humidity sensor, the cooling fan and the air conditioner are used for monitoring and adjusting the internal environment of the device box body; the door magnetic switch is used for carrying out protection and alarm of the access control system. The photovoltaic module 21 is arranged at the top of the box body 5 and used for photovoltaic power generation to provide electric energy for a power grid, and the inclination angle of the photovoltaic module is determined according to actual lighting.
As shown in fig. 3, the photovoltaic module 21 and the energy storage battery 22 are connected to the dc side of the power converter 3, the ac side of the power converter 3 is connected to the grid-connected breaker, the switching power supply, the socket, the air conditioner, and the heat dissipation fan take power from the ac side of the power converter 3, the switching power supply takes power from the ac side of the power converter 3 to supply power to the central monitoring unit 1, the battery management system 23, the controller, and the external auxiliary device 4, wherein the microprocessor of the central monitoring unit 1, the battery management module 23, the controller, the temperature and humidity sensor, and the switch and the door magnetic switch use 12V power supply.
As shown in fig. 4, the battery management module 23, the power converter 3, the grid-connected circuit breaker, the smoke detector, the temperature and humidity sensor, and the door magnetic switch are all in communication connection with the microprocessor through an RS485 communication mode, and the communication protocol is ModbusRTU.
The working principle and the process of the distribution transformation dynamic capacity-increasing light storage integrated device provided by the embodiment are as follows.
The central monitoring module issues a power converter charging and discharging command according to the platform area load information acquired by the HPLC module, and controls the storage and release of energy of the energy storage battery;
when the energy storage battery does not work, the central monitoring control is switched to the photovoltaic module to generate electricity to provide electric energy for the power grid;
when the central control receives the abnormal alarm of the battery management module, the power converter and the smoke detector, the control device is switched to a standby state or a stop state, and an alarm signal of the device is sent;
and the central monitor controls the working modes of the air conditioner and the cooling fan according to the information of the temperature and humidity sensor.
The above embodiments provide a distribution transformation dynamic capacity-increasing optical storage integrated device, which can be used as both a power supply and a load. According to the power consumption requirements and power consumption characteristics of users in different time periods, the device is charged in the power consumption valley period, and is discharged according to the real-time requirements of user loads in the power consumption peak period, so that the power supply capacity is increased locally. During peak period of load power utilization in summer or spring festival, the peak clipping and valley filling are connected to realize dynamic capacity increasing of distribution transformer, so that the conditions of distribution transformer overload, line overload, low voltage of transformer area and unbalanced three phases of load can be effectively improved, the line loss of transformer area is reduced, the operation economy is improved, and the power supply reliability of a power distribution network is improved. During the non-load power utilization peak period, the system can be used for temporary power supply, emergency power protection, uninterrupted power operation and the like. Has the characteristics of mobility, large capacity, low noise, energy conservation, emission reduction and environmental protection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A distribution transformer dynamic capacity-increasing optical storage integrated device is characterized by comprising a central monitoring component, an optical storage component, a power converter and external auxiliary equipment;
the optical storage assembly, the power converter and the external auxiliary equipment are in communication connection with the central monitoring system; the light storage assembly and the external auxiliary equipment are connected with the power converter, and the external auxiliary equipment is used for being connected to a 380V main line of the power distribution area.
2. The distribution transformation dynamic capacitance-increasing light-storage integrated device according to claim 1, wherein the light-storage assembly comprises a photovoltaic assembly, an energy storage battery, a battery management module and a high-voltage box, the photovoltaic assembly and the energy storage battery are both connected to the direct-current side of the power converter through the high-voltage box, and the battery management module is connected with the energy storage battery.
3. The distribution transformer dynamic capacity-increasing integrated optical storage device according to claim 2, wherein the energy storage battery is composed of a plurality of lithium batteries, and the total output voltage of the energy storage battery is 200-400V.
4. The distribution transformation dynamic capacity-increasing optical storage integrated device according to claim 2, wherein the central monitoring comprises a microprocessor, a communication module and a switch which are connected in sequence; the communication module is provided with an RS485 communication interface and an Ethernet port, and the switch is provided with a 4G module, a WIFI networking module and the Ethernet port.
5. The distribution transformation dynamic capacity-increasing light-storage integrated device according to claim 4, wherein the power converter comprises a bidirectional converter and a controller connected with the bidirectional converter.
6. The distribution transformer dynamic capacity-increasing optical storage integrated device according to claim 4, wherein the external auxiliary equipment comprises a grid-connected circuit breaker, a grid-connected cable, an HPLC module and a switching power supply; the grid-connected circuit breaker and the switch power supply are connected to the alternating current side of the power converter, the grid-connected circuit breaker is connected to a 380V main line of a power distribution area through the grid-connected cable, and the HPLC module is connected to the grid-connected cable in series; the microprocessor, the switch, the battery management module and the power converter are all connected with the switching power supply.
7. The distribution transformer dynamic capacity-increasing optical storage integrated device according to claim 6, wherein the external auxiliary equipment further comprises a smoke detector, a temperature and humidity sensor, a door magnetic switch, an air conditioner and a cooling fan; the smoke detector, the temperature and humidity sensor and the door magnetic switch are all connected with the switching power supply, and the air conditioner and the cooling fan are all connected to the alternating current side of the power converter.
8. The distribution transformation dynamic capacity-increasing light-storage integrated device according to claim 7, further comprising a box body, wherein the box body comprises an energy storage battery compartment and a main control compartment which are divided by a heat insulation plate; energy storage battery, battery management module, high-voltage box, air conditioner, smoke detector set up in the energy storage battery cabin, central monitoring, power converter, the circuit breaker that is incorporated into the power networks, the cable that is incorporated into the power networks, HPLC module, switching power supply, temperature and humidity sensor, radiator fan set up in the main control cabin, the door magnetic switch is installed on the cabinet door of box.
9. The distribution transformation dynamic capacity-increasing light storage integrated device according to claim 8, wherein the photovoltaic module is arranged on the top of the box body.
10. The distribution transformer dynamic capacity-increasing optical storage integrated device according to claim 7, wherein the battery management module, the power converter, the grid-connected circuit breaker, the smoke detector, the temperature and humidity sensor and the door magnetic switch are all in communication connection with the microprocessor through an RS485 communication mode.
CN202020871585.5U 2020-05-22 2020-05-22 Join in marriage and become dynamic increase volume light and store up integrated device Active CN211908382U (en)

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Application Number Priority Date Filing Date Title
CN202020871585.5U CN211908382U (en) 2020-05-22 2020-05-22 Join in marriage and become dynamic increase volume light and store up integrated device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020871585.5U CN211908382U (en) 2020-05-22 2020-05-22 Join in marriage and become dynamic increase volume light and store up integrated device

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CN211908382U true CN211908382U (en) 2020-11-10

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