Korea Institute of Energy Research

Seaseung Oh

Su Yong Chae

Yujin Song

Suyong Chae

Jongbok Baek

Soo Bin Han

Jaejoon Choi

Provided is a control method of a complex energy system that supplies heat and power to energy consumers through a heat network and a power network. The control method includes monitoring energy consumption information of the energy consumers and confirming an energy price applied to each of the energy consumers, calculating a total energy consumption cost of the energy consumers according to the energy price and the energy consumption information, and controlling a cogenerator and a heat generator so that a sum of a power supply amount of the cogenerator and a power consumption amount from an external power grid is equal to a total power consumption amount of the energy consumers, a sum of a heat supply amount of the cogenerator and a heat supply amount of the heat generator is equal to a total heat consumption amount of the energy consumers, and a target function value obtained by subtracting the total energy consumption cost from a sum of a power consumption cost from the external power grid and operating costs of the cogenerator and the heat generator is maximized.

Complex energy system in bidirectional energy network and control method thereof

The present disclosure relates to frequency control of power conversion modules for decreasing THD (Total Harmonic Distortion) in a power conversion device in which a plurality of power conversion modules operate in parallel. In one aspect of the present disclosure, an embodiment provides a power conversion device comprising a plurality of power conversion modules being connected in parallel to receive input power and provide output AC power, and a frequency controller controlling each operating frequency of the plurality of power conversion modules, wherein, the frequency controller may include a function as a first frequency regulating step for regulating each operating frequency of the plurality of power conversion modules, so that the operating frequencies of the plurality of power conversion modules have a specific relationship with each other.

Control of power conversion device for decreasing total harmonic distortion

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Seoul, South Korea

Seaseung Oh