I. Product definition
New energy box-type substation (referred to as "new energy box transformer" for short) is an integrated substation equipment specially designed for new energy generation systems such as wind energy and photovoltaic. It integrates step-up transformer, high-voltage switchgear, intelligent control system and protection device in an integrated box to realize the functions of energy collection, voltage conversion and grid-connected transmission of new energy power stations.
Second, the product structure composition
1. Core functional units
High voltage room: equipped with load switch cabinet, circuit breaker, lightning arrester, etc., to realize 35kV (or higher) voltage level grid connection.
Transformer room:
Photovoltaic power station: Double split winding transformer (such as 35kV/0.8-0.8kV) is usually used.
Wind farm: On-load voltage regulating transformers (such as 35kV/690V) are often used.
Low-voltage chamber: including intelligent grid-connected cabinet, SVG reactive power compensation device and anti-reflux protection system.
Intelligent control system: integrated SCADA communication interface, supporting remote monitoring and energy management.
2. Special configuration
Harmonic suppression device: to deal with higher harmonics generated by photovoltaic inverter.
Anti-islanding protection: in line with IEEE 1547 and other grid-connected standards.
Environmental adaptation system: equipped with dehumidifier and temperature-controlled fan (-40℃-+50℃ wide temperature operation).
Third, the technical characteristics
1. Special design for new energy
Dyn11 wiring is adopted for transformer to adapt to unbalanced load.
Configure dual MPPT input interface (photovoltaic only)
With low voltage ride-through (LVRT) function.
2. Intelligent operation and maintenance features
Integrated 5G communication module to support remote diagnosis.
Equipped with digital twin system to realize fault prediction.
Optional UAV inspection interface
3. High protection level
The box is made of 304 stainless steel or composite nano-materials.
Protection level reaches IP54 (IP65 is optional in coastal areas).
Special anti-corrosion treatment (C5-M anti-corrosion standard)
Fourth, typical application scenarios
Typical cases of technical points in application field
Optimal design of 35kV step-up and capacity ratio of centralized photovoltaic power station; Northwest Gobi Desert photovoltaic base
Distributed photovoltaic 10kV grid connection, anti-reflux protection industrial and commercial roof photovoltaic project
Design of 690 V/35 kV variable voltage and anti-vibration mountain wind farm for onshore wind farm
Anti-corrosion box transformer for offshore wind power, and ship transportation is suitable for coastal intertidal wind power projects.
Two-way converter design of energy storage power station, SOC intelligent management of power grid-side energy storage frequency modulation power station
V. Selection Guide
1. Selection of key parameters
Capacity matching: 1.1-1.3 times the total rated power of inverter.
Voltage level:
Photovoltaic: 0.8kV/10kV/35kV
Wind power: 0.69kV/35kV
Protection requirements:
Desert area: dust prevention design
Cold region: low temperature starting device
2. Energy efficiency standards
The no-load loss of transformer meets the first-class energy efficiency of GB 20052-2020.
System efficiency ≥98.5% (including transformer loss)
VI. Industry Development Trend
Modular prefabrication: "Lego" rapid splicing technology is adopted, and the installation period is shortened by 50%.
Digital Twin Application: Realizing Life Cycle Management through 3D Modeling
Optical storage and charging integration: integrating energy storage system and charging pile interface
Carbon footprint management: using environmental protection sulfur hexafluoride instead of gas
VII. Key points of operation and maintenance management
Check the operation status of cooling system every quarter.
Annual infrared thermal imaging detection of joint temperature
Analysis of insulation aging trend through on-line monitoring system
Establish oil chromatographic analysis file (oil-immersed transformer)
Eight, typical technical parameters
Project parameter range
The rated capacity is 500kVA-5000kVA.
Insulation level LI170AC70(35kV level)
Partial discharge ≤10pC (dry-type transformer)
Noise level ≤55dB(1m)
Service life ≥25 years
As the key interface equipment of renewable energy power generation, new energy box transformer is developing continuously in the direction of intelligence, high reliability and environmental friendliness. In the future, with the maturity of virtual power plant technology, its power grid support function will be further enhanced and become an important part of new power system. Technical introduction of new energy box substation products of Boshida Group Company
I. Product definition
New energy box-type substation (referred to as "new energy box transformer" for short) is an integrated substation equipment specially designed for new energy generation systems such as wind energy and photovoltaic. It integrates step-up transformer, high-voltage switchgear, intelligent control system and protection device in an integrated box to realize the functions of energy collection, voltage conversion and grid-connected transmission of new energy power stations.
Second, the product structure composition
1. Core functional units
High voltage room: equipped with load switch cabinet, circuit breaker, lightning arrester, etc., to realize 35kV (or higher) voltage level grid connection.
Transformer room:
Photovoltaic power station: Double split winding transformer (such as 35kV/0.8-0.8kV) is usually used.
Wind farm: On-load voltage regulating transformers (such as 35kV/690V) are often used.
Low-voltage chamber: including intelligent grid-connected cabinet, SVG reactive power compensation device and anti-reflux protection system.
Intelligent control system: integrated SCADA communication interface, supporting remote monitoring and energy management.
2. Special configuration
Harmonic suppression device: to deal with higher harmonics generated by photovoltaic inverter.
Anti-islanding protection: in line with IEEE 1547 and other grid-connected standards.
Environmental adaptation system: equipped with dehumidifier and temperature-controlled fan (-40℃-+50℃ wide temperature operation).
Third, the technical characteristics
1. Special design for new energy
Dyn11 wiring is adopted for transformer to adapt to unbalanced load.
Configure dual MPPT input interface (photovoltaic only)
With low voltage ride-through (LVRT) function.
2. Intelligent operation and maintenance features
Integrated 5G communication module to support remote diagnosis.
Equipped with digital twin system to realize fault prediction.
Optional UAV inspection interface
3. High protection level
The box is made of 304 stainless steel or composite nano-materials.
Protection level reaches IP54 (IP65 is optional in coastal areas).
Special anti-corrosion treatment (C5-M anti-corrosion standard)
Fourth, typical application scenarios
Typical cases of technical points in application field
Optimal design of 35kV step-up and capacity ratio of centralized photovoltaic power station; Northwest Gobi Desert photovoltaic base
Distributed photovoltaic 10kV grid connection, anti-reflux protection industrial and commercial roof photovoltaic project
Design of 690 V/35 kV variable voltage and anti-vibration mountain wind farm for onshore wind farm
Anti-corrosion box transformer for offshore wind power, and ship transportation is suitable for coastal intertidal wind power projects.
Two-way converter design of energy storage power station, SOC intelligent management of power grid-side energy storage frequency modulation power station
V. Selection Guide
1. Selection of key parameters
Capacity matching: 1.1-1.3 times the total rated power of inverter.
Voltage level:
Photovoltaic: 0.8kV/10kV/35kV
Wind power: 0.69kV/35kV
Protection requirements:
Desert area: dust prevention design
Cold region: low temperature starting device
2. Energy efficiency standards
The no-load loss of transformer meets the first-class energy efficiency of GB 20052-2020.
System efficiency ≥98.5% (including transformer loss)
VI. Industry Development Trend
Modular prefabrication: "Lego" rapid splicing technology is adopted, and the installation period is shortened by 50%.
Digital Twin Application: Realizing Life Cycle Management through 3D Modeling
Optical storage and charging integration: integrating energy storage system and charging pile interface
Carbon footprint management: using environmental protection sulfur hexafluoride instead of gas
VII. Key points of operation and maintenance management
Check the operation status of cooling system every quarter.
Annual infrared thermal imaging detection of joint temperature
Analysis of insulation aging trend through on-line monitoring system
Establish oil chromatographic analysis file (oil-immersed transformer)
Eight, typical technical parameters
Project parameter range
The rated capacity is 500kVA-5000kVA.
Insulation level LI170AC70(35kV level)
Partial discharge ≤10pC (dry-type transformer)
Noise level ≤55dB(1m)
Service life ≥25 years
As the key interface equipment of renewable energy power generation, new energy box transformer is developing continuously in the direction of intelligence, high reliability and environmental friendliness. In the future, with the maturity of virtual power plant technology, its power grid support function will be further enhanced and become an important part of new power system.
