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Photovoltaic power generation

Photovoltaic power generation systems are characterized by significant DC‑side voltage fluctuations, inverter nonlinearity, pronounced harmonic content, stringent grid‑connection requirements, strong environmental adaptability, and the need to accommodate diverse application scenarios—including centralized, string‑type, residential, and commercial/industrial installations. As a critical interface device in photovoltaic plants, linking the DC side to the AC side and ultimately to the grid, transformers are designed around six key dimensions: safety and reliability, high efficiency and energy savings, harmonic mitigation, grid‑connection compatibility, resistance to environmental interference, intelligent operation and maintenance, and all‑scenario adaptability. These solutions cover a full spectrum of applications, ranging from large‑scale centralized PV plants and commercial/industrial distributed systems to residential PV installations, PV‑plus‑storage projects, and PV deployments on deserts, mountainous terrain, or water surfaces, as well as upgrades and retrofits of aging PV facilities. Adhering rigorously to national and industry‑mandated standards such as GB/T 19964 “Technical Specifications for Grid Connection of Photovoltaic Power Plants,” GB 20052 “Minimum Energy Efficiency Limits and Energy Efficiency Classes for Power Transformers,” GB/T 1094 “Power Transformers,” and NB/T 10393 “Minimum Energy Efficiency Limits and Energy Efficiency Classes for Transformers,” and taking into account the electrical characteristics and operating conditions of photovoltaic systems, we provide end‑to‑end, ready‑to‑deploy solutions.

Core Principles for Selection

Media and Structural Selection

Scene-based classification

1. Centralized photovoltaic power plants (10 MW and above) 2. Commercial and industrial distributed PV systems (100 kW–10 MW) 3. Residential PV systems (≤500 kW) 4. Outdoor harsh environments (desert, saline-alkali, coastal areas)

Energy Efficiency and Energy-Saving Selection

Mandatory Level 1 Energy Efficiency

1. Oil-immersed 2. Dry-type transformer 3. Core objective

Specialized electrical performance adaptation

Photovoltaic-specific core

1. DC bias rejection capability 3. Harmonic tolerance capability 3. Voltage compatibility and voltage regulation 4. Overload and voltage fluctuation tolerance

Media and Structural Selection

Scene-based classification

Specialized Supporting Solutions

Special Plan for DC Bias Suppression

Core standard configuration of photovoltaic transformers

Winding Design

Core role

Harmonic and Power Quality Mitigation Solutions

K13/K20 Harmonic-Resistant Transformer

Source control

End-of-pipe treatment

Goal

Special Plan for DC Bias Suppression

Core standard configuration of photovoltaic transformers

Winding Design

Core role

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

ZBW Series European‑Style Pad‑Mounted Transformer

Suitable for substations, industrial facilities, commercial buildings, residential structures, and other applications.

ZGS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

KYN28 Series High-Voltage Switchgear

Applicable to power plants, substations (distribution rooms), and various sectors including industry, commerce, and construction.

GZS Series American‑Style Pad‑Mounted Transformer

ZBW Series European‑Style Pad‑Mounted Transformer

ZGS Series American‑Style Pad‑Mounted Transformer

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GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

ZBW Series European‑Style Pad‑Mounted Transformer

Suitable for substations, industrial facilities, commercial buildings, residential structures, and other applications.

ZGS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

KYN28 Series High-Voltage Switchgear

Applicable to power plants, substations (distribution rooms), and various sectors including industry, commerce, and construction.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

GZS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

ZBW Series European‑Style Pad‑Mounted Transformer

Suitable for substations, industrial facilities, commercial buildings, residential structures, and other applications.

ZGS Series American‑Style Pad‑Mounted Transformer

Applicable to industries, commerce, residential use, urban lighting, construction, and other sectors.

KYN28 Series High-Voltage Switchgear

Applicable to power plants, substations (distribution rooms), and various sectors including industry, commerce, and construction.

Typical Cases

State Power Investment Corporation’s Lop Nur 100 MW/400 MWh energy storage project is paired with a 400 MW photovoltaic power generation project.

The State Power Investment Corporation’s 100 MW/400 MWh energy storage project is paired with a 400 MW photovoltaic power generation facility, located in the Hotan Prefecture of Xinjiang. The equipment was supplied by Shaanxi Hante Smart Electric Equipment Co., Ltd., and comprises four SFZ20‑100000/110 kV oil‑immersed three‑phase, double‑winding, on‑load tap‑changing step‑up transformers, along with associated grounding transformers, station service transformers, neutral‑point complete sets, and auxiliary equipment. Centered on 110 kV step‑up transmission, the project is tailored to accommodate the intermittent nature of solar generation; its integrated energy storage system enables coordinated operation between solar and storage, ensuring stable grid connection and reliable power supply. It serves as a critical substation‑level infrastructure supporting the large‑scale clean energy base in Hotan, Xinjiang.

Hante / Walking with You

Phone: +86 400-039-0239

Email: htzd@htzd-transformer.cn

You can contact us by phone or email.

Language

Shaanxi Hante Intelligent Electric Equipment Co., Ltd.

*Note: Please be sure to provide accurate information; we will contact you as soon as possible.

Email box

htzd@htzd-transformer.cn

National Toll-Free After-Sales Service Hotline

+86 400-039-0239

Address

No. 1 Hanbao Road, Hantai District, Hanzhong City, Shaanxi Province

Business license

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