■ Technology Introduction

In order to improve and solve many problems of the manual transformer, we have developed a linear OLTC (On Load Tap Changer) technology that can adjust the voltage in real time under load. By applying this, we developed intelligent transformers, smart transformers, smart voltage regulators, and distributed power (solar, wind power) transformers.  

On-Load Tap Changer (OLTC) technology, which is capable of real-time voltage adjustment at high voltage, is a very important core technology in the power industry. The OLTC is installed in a power transformer and is mainly used for substations, but the problem of voltage instability still persists due to technical limitations. In addition, all other transformers except power transformers installed in substations are passive transformers, and voltage cannot be adjusted at all under load. Still, if the voltage is unavoidable, the tap of the manual transformer must be adjusted after a power outage, but there is a serious problem in that the voltage cannot be adjusted at all after the transformer is installed, since power outages cannot be frequently performed.  

To improve this problem, we developed a linear OLTC (On Load Tap Changer) that can adjust voltage in real time under load. This enables real-time voltage adjustment in any case. Conventional advanced technologies are all rotary rotation methods, but our developed technology is a technology that has been developed with a completely different linear sliding method and is a technology that has overcome the technical limitations of advanced technologies and is a patented technology.  

On-load tap changer (OLTC) technology for stabilizing transmission/distribution voltage is a very important core technology in the power industry. It is mainly used for substations by attaching an on-load tap-changer OLTC to a power transformer, and it is applied to a line voltage regulator and system. Since the transformer is used manually, there is a serious problem that the voltage cannot be adjusted. To improve this problem, we developed a linear sliding type OLTC (On Load Tap Changer). While all of the existing overseas technologies are rotary, our technology is a patented technology with a linear sliding method that is completely different from the existing method. Due to our developed technology, OLTC intelligent transformer and smart transformer can be used, resulting in voltage stabilization and efficiency improvement, reducing power bills and reducing losses.  

Electricity is supplied from the power plant through the substation to power consumers (factory, building). When supplying such a long distance through a wire, a loss occurs due to the resistance of the wire, the voltage drops due to the loss, and becomes more unstable due to the influence of the load. When unstable voltage is applied to the transformer, the conventional passive transformer cannot respond at all. When unstable voltage is applied to a passive transformer, the output voltage must be unstable, and all loads must be used in an unstable state, reducing efficiency and increasing losses.  

If the voltage is unstable, the efficiency decreases and losses increase even when the voltage is low, and a higher voltage becomes a bigger problem. It's like high blood pressure and low blood pressure frequently repeating, and it's like a car repeating speeding and slowing from time to time. When the voltage is used as a “stable rated voltage”, the loss is least and the efficiency is good. When the voltage drops by 5%, the losses increase to 9.75%. This is because when the voltage drops, the current rises and the loss is proportional to the square of the risen current.  

In the case of using “intelligent transformer” capable of “real-time voltage adjustment”, the voltage is stabilized, improving efficiency, reducing losses, and reducing power bills. Conventional electric power devices have one unique function, but the developed technologies "intelligent transformer" and "smart transformer" all become possible.

■ Expected Effects with the Product

○Switch to a high-quality power environment

Intelligent transformer, smart transformer development innovatively improves power quality according to real-time voltage adjustment It maximizes system efficiency and load efficiency, thus reducing energy.

○High efficiency of load facilities

Malfunction and error reduction of industrial equipment and load equipment, the defect rate of the product is reduced, productivity is improved, and the maintenance cost is reduced by extending the life of the load equipment.

○ Energy savings / lower electricity bills

Real-time voltage adjustment stabilizes all loads, increases load efficiency, reduces system loss and load loss, and

Energy savings, which reduces power bills.

○ System stability / reduced maintenance costs

Real-time voltage adjustment improves the overall power quality to protect the electrical device due to overvoltage and the power system and load is stable due to voltage instability has the effect of preventing accidents in advance and preventing.

○ Increase productivity / maximizing corporate profits

The overall power quality is improved to reduce the electrical error reduction and defect rate and increase productivity to maximize the company's profit and increase the competitiveness. 

○ Reduced opportunity costs by extending the life of power equipment and load equipment

Real-time voltage adjustment stabilized the voltage is not the electrical impact of the load equipment is extended the life of the power equipment and the load equipment reduces the opportunity cost.

○ Building a low-carbon (CO2) environment

Contributes to carbon dioxide (Co2) reduction and green growth by reducing power energy.