New Zealand's oil immersed transformers are about to experience explosive demand in 2023

Overview of Electricity sector in New Zealand in 2023

 

 

 

The Electricity sector in New Zealand system consists of two AC systems, namely, the south and the north, which are connected by a 1200kV Submarine communications cable in the middle. The country is rich in hydraulic resources, with a large proportion of installed hydropower capacity, and the majority is distributed in the southern part of the South Island, while New Zealand's load center is on the North Island. Therefore, there are capacity constraints on the transmission channels between the South and North Islands. Market analysis In 1996, Electricity sector in New Zealand began the reform of electricity marketization and reorganized the power generation assets of New Zealand Power Company. First, separate more than 30% of Electricity sector in New Zealand's installed capacity and establish another state-owned enterprise, ContactEnergy Ltd. Second, Electricity sector in New Zealand has been stripping off its power generation assets until its market share is less than 45%. Third, Electricity sector in New Zealand is prohibited from owning any power retail company. At present, about 40 distribution companies nationwide provide distribution services and power retail services. The Electricity sector in New Zealand electricity market is composed of the wholesale electricity market and the distribution competitive market, and implements a market mechanism combining primary spot trading and secondary futures contract trading. Due to the limitation of the transmission capacity of high-voltage DC cables between North Island and South Island, different price zones have been established for North Island and South Island respectively. In terms of operation process, power generation companies sell the generated electricity to the electricity wholesale market through competition, and the market wholesales the electricity to electricity buyers. Through the retail market, electricity buyers then sell the wholesale electricity to end users of different sizes.

 

 

Why are oil-immersed transformers particularly important in New Zealand

 

 

 

The reasons why oil immersed transformers are particularly important in New Zealand are as follows:

 

 

 

Oil immersed transformer in New Zealand is a new type of high-performance transformer with a more reasonable structure and better performance. This type of transformer has no air gap in its magnetic circuit, and the winding is tighter. The three magnetic circuits have the same length and are all the shortest. The cross-sectional area of the iron core column is closer to that of a circular shape, which further improves its performance, reduces losses, reduces noise, balances three terms, and can reduce the third harmonic component.

 

 

 

This type of oil immersed transformer is more suitable for the transformation of power grids in urban and rural areas, industrial and mining enterprises.

 

In New Zealand, this type of oil immersed transformer is also used for combination transformers and pre installed substation transformers, further demonstrating its importance in the country.

 

 

Hengfengyou Electric produces 6.6kv, 10kv Various types of oil immersed transformers, including 15kV, 30kV, 33kV, 35kV, etc., have been exported to New Zealand, and multiple 300kVA capacity 11kV three-phase oil immersed transformers have been exported. Customer feedback is very good.

 

 

 

When purchasing oil-immersed transformers in New Zealand, attention may be paid to the following aspects:

 

 

 

Quality and performance: New Zealand buyers may be concerned about the quality and performance of oil-immersed transformers. They may pay attention to whether the transformer meets relevant quality and performance standards, such as insulation performance, load capacity, noise level, etc.

 

 

Price and cost: When purchasing oil immersed transformers, price and cost are also important considerations. Buyers may seek the most cost-effective solution while also considering budget and investment returns.

 

 

 

Maintainability and reliability: Oil immersed transformers require regular maintenance and upkeep, so buyers may be concerned about their maintainability and reliability. They may consider the lifespan, failure rate, and convenience of maintenance of transformers.

 

 

 

Energy efficiency and environmental protection: In New Zealand, environmental protection and energy efficiency are important considerations. Buyers may be concerned about the energy efficiency of oil immersed transformers and their compliance with environmental standards and regulations.

 

 

 

Supplier's reputation and after-sales service: In addition to the quality and performance of the product itself, buyers also consider the supplier's reputation and after-sales service. They may seek continuous technical support, repair and maintenance, and component replacement services from suppliers.

 

 

 

Safety and compliance: In New Zealand, the safety and compliance of oil-immersed transformers are also very important. Buyers may be concerned about whether the product complies with relevant safety and environmental regulations, as well as whether the supplier holds relevant certifications and licenses.

 

 

Hengfengyou Electric Group mainly produces 11kV, 20kV, 33kV distribution transformers, distribution boxes, transmission towers, cables and other transmission and distribution products. 30 years of experience in manufacturing power transformers and other transmission and distribution equipment. Hengfengyou Electric will provide you with the best electrical product solutions. WhatsApp:+86158 5325 2696 (Jack)+86158 5321 8976 (Olivia) info@hengfengyou.com ;

 

https://www.hengfengyou.com 】

 

 

 

 

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New Zealand's insulation requirements for oil immersed transformers mainly include the following aspects:

 

 

 

Temperature and humidity requirements: The insulation oil inside the transformer needs to operate within the specified temperature and humidity range. In New Zealand, the operating temperature of transformers usually needs to be between -20 ℃ and 70 ℃, while humidity needs to be within a range of no more than 90% relative humidity.

 

 

 

Performance requirements for insulation oil: The insulation oil used in transformers must meet relevant New Zealand standards, such as NZS 3320:2003 "Safety Standards for Transformers and Capacitors". Insulating oil needs to have good electrical performance and thermal stability to ensure the normal operation and safety of transformers.

 

 

 

Insulation structure requirements: The insulation structure inside the transformer must comply with relevant standards, such as NZS 3320:2003 "Safety Standards for Transformers and Capacitors". The insulation structure of transformers requires strict design and manufacturing to ensure good electrical performance and reliability.

 

 

 

Fire resistance requirements: In New Zealand, the shell of the transformer needs to have a certain degree of fire resistance to prevent damage to personnel and equipment in the event of a fire. Specific fire resistance requirements can refer to relevant New Zealand standards, such as NZS 5261:2004 "Safety Standards for Electrical Equipment".

 

 

 

Maintenance and testing requirements: Transformers need to undergo regular maintenance and testing during use to ensure their normal operation and safety. Specific maintenance and testing requirements can refer to relevant standards, such as NZS 3320:2003 "Safety Standards for Transformers and Capacitors".