IEC ISO Padmount 220kv Mobile Substation Transformer Three Phase Electrical OLTC

Outdoor Mobile Substation with 220kv power transformer CZBT

1. Application of Outdoor Mobile Substation with 220kv power transformer CZBT

The prefabricated mobile substation is applied to fully or partial replace the conventional substation and resume the power supply in case of emergency；help an area which suffers shortage of power supply capacity in heavy load season or period； Use as the temporary substation in areas with booming power demand that exceed the existing electric power capability, to ease the tension of power supply；Work as a temporary substation in areas of permanent substation suspended due to the capital shortage or other kind of reason.

The prefabricated mobile substation is the flexible and reliable way for transportation with the complete equipment. It also saves investment in various aspects, concerning the land requisition, civil construction, equipment installation, etc. which improves the reliability of power supply for the system.

The prefabricated mobile substation provides with all the functions that a conventional substation has; as well as easy installation and quick into the service. It could be into operation at once on site after the connection of input and output cable only.

Introduction of mobile substation main device

■ Main power transformer

The design and production technology of our main transformer is researched and redeveloped on the basis of a variety of advanced technologies. With the assist of our many-year design and manufacture experiences, the reliability and performance of the product have reached international advanced level. Through continuous improvement and alteration, a series of the product has been formed, with characteristics of low loss, low noise, low partial discharge, high short circuit withstand capability, high impedance, and fully-enclosed. The series covers 16000 ~ 63000kVA double-winding non- excitation voltage regulating transformer, 16000 ~ 63000kVA double-winding power transformer load tap. Its main features are as follows.

(1) Features of Outdoor Mobile Substation with 220kv power transformer CZBT

1.1 Product standards

GB1094.1 ~ 2-1996

GB1094.3 ,5-2003

GB/T6451-2008

IEC60076

1.2 low loss

- Optimization of electromagnetic calculations, using combined technology of electrical shielding and magnetic circuit, effectively controlled leakage, so as to reduce the load loss and to avoid partial overheating.

- Use high quality cold-rolled lattice orientation high permeability silicon steel, to reduce the load loss, no-load current.

- Core all-helical stacking with STEP joints, and advanced stacking process, reduced the load loss, load current and electromagnetic noise.

1.3 Low partial discharge To ensure the safe and steady operation of the transformer under continuous rated voltage, our Electric Power Research Institute conducted a lot of research to develop a more reasonable insulation structure, plus the strict technology specifications and technical staff experience, ensured the low partial discharge of our products.

1.4 High strength

- Adoption of six-side method positioning for the body, meets the transportation requirements of horizontal acceleration not more than 0.3g, vertical direction not greater than 0.15g.

- Upper and Lower Clamps and the formation of tight fixed side beam frame.

- The tank can withstand the vacuum test and required positive pressure test.

1.5 Low Noise

- Use of high-quality core silicon steel;

- Core STEP by STEP stepping joints;

- Reduction of the flux density, despite of the increase of cost;

- Use low-noise fan as the air cooling equipment;

- Increase the shock absorbing measures;

- Well interior-protection, to avoid direct rigid contact of the body and tank.

1.6 Maintenance-free Our company adopts the domestic leading technology, use fully enclosed structure for the transformer tank, ensuring product life of 30 years, and maintenance-free operation.

2. Hardware facility

We own two large scale assembly workshops, one for 110kV and the other for 22OkV. Assembly workshop for 110kV has 169m length, 24m span, 28m inner height, 22.5m height of crane rail. Travelling cranes by remote control are provided in the workshop, the maximum lifting weight is 200 tons.

Modern automatic control systems are adopted in test center, large scale complete set of equipments are controlled by integrate control desk with many functions.

3. Outdoor Mobile Substation with 220kv power transformer CZBT Outline drawing

HV side incoming line uses 220kV GIS switch, using oil-SF6 bushing to connect GIS switching and transformer; the project uses two trailers, HV incoming line GIS and transformer are mounted on the trailer 1, and switchgear and control, protection, metering and other equipments are mounted in the container on the trailer 2.