December 09, 2025Dec 09, 2025
KCNA Pyongyang Times

Excitation control device for synchronous generator developed

Date: 19/09/2021 | Source: Pyongyang Times | Read original version at source

The electricity research institute of the State Academy of Sciences developed an excitation control device for synchronous generator.

The device maintains the terminal voltage of generator at a certain rate, evenly distributes reactive power to generators in parallel operation and keeps up the synchronous operation state of generators in times of trouble with the electrical system.

“Our research team analysed the defects of the previous excitation control device, developed a new one and introduced it to several power stations,” said Jo Chol Jin, section chief of the institute.

According to him, the previous device was greatly affected by frequency variation and failed to sensitively respond to the change in the operation state of various electrical systems. Another defect was that at thermal power plants using high frequency subexciters, the reactive power fluctuated as synchronizing signal measurement error of the subexciters became greater along with the increase in excitation current and subsequently the operation of controlled rectifiers got unsteady.

The research team developed a digitalized and intelligent excitation control device and program for thermal and hydroelectric power stations.

The device helps enhance the stability of operation and manoeuvrability of generator in various ranges of variation in voltage and frequency.

And the team has duplexed the excitation control system and improved the reliability of operation of generator and the stability of electrical system with various troubleshooting and excitation limiting functions.

“In particular, we studied and introduced a methodology for overcoming the effect of the phase short circuit caused by the rise in the inductance of line and load current, which was one of knotty problems in checking and measuring the synchronizing signal of thermal generators using high-frequency subexciters, and for compensating phase lag of control angle and ascertained the effectiveness of the methodology,” said researcher Ri Kwang Jin.

The new excitation control device costs 25 percent less than the previous one and can more than double the control precision and reduce the overshoot to less than ten percent.

“Our complex introduced the new excitation control device for synchronous generator this year and thus increased the lifespan of generating facilities and saved much labour and fund for repairing equipment,” said Ri Myong Sop, senior engineer of the Pukchang Thermal Power Complex.

More From Pyongyang Times

Iranian leader condemns misleading propaganda of West

Iranian leader condemns misleading propaganda of West

Seyed Ali Khamenei, leader of Iran’s Islamic revolution, censured the West for its misleading propaganda about Iran in a recent

December 07, 2025

Seyed Ali Khamenei, leader of Iran’s Islamic revolution, censured the West for its misleading propaganda about Iran in a recent

Sports contest of artistes held

Sports contest of artistes held

The 55th Sports Contest of Artistes took place at the Basketball Gymnasium on Chongchun Street in Pyongyang on December 3 and 4.

December 07, 2025

The 55th Sports Contest of Artistes took place at the Basketball Gymnasium on Chongchun Street in Pyongyang on December 3 and 4.

Quality of education improves at public health vocational schools

Quality of education improves at public health vocational schools

True to the intention of the Workers’ Party of Korea, which set this year as the first year of the public health revolution,

December 07, 2025

True to the intention of the Workers’ Party of Korea, which set this year as the first year of the public health revolution,

With ambition to lead the world

With ambition to lead the world

The Rason Hyesong General Development Company was selected as one of the top ten businesses of the DPRK in succession for 2023 and

December 07, 2025

The Rason Hyesong General Development Company was selected as one of the top ten businesses of the DPRK in succession for 2023 and

Chongjin Water Park newly built

Chongjin Water Park newly built

North Hamgyong Province has newly built the Chongjin Water Park. The public service centre with unique architectural and modern

December 07, 2025

North Hamgyong Province has newly built the Chongjin Water Park. The public service centre with unique architectural and modern

Preparations for operation of new factories go full steam ahead

Preparations for operation of new factories go full steam ahead

Different areas of the country are stepping up preparations in earnest for the operation of their new regional-industry factories,

December 07, 2025

Different areas of the country are stepping up preparations in earnest for the operation of their new regional-industry factories,

Russian FM warns against Japan’s moves toward militarization

Russian FM warns against Japan’s moves toward militarization

Maria Zakharova, spokeswoman for the Russian Foreign Ministry, warned against Japan’s dangerous moves towards militarization at a

December 06, 2025

Maria Zakharova, spokeswoman for the Russian Foreign Ministry, warned against Japan’s dangerous moves towards militarization at a

Ceremonies of moving into new houses held in Nampho

Ceremonies of moving into new houses held in Nampho

Modern rural dwellings which have been built at the Jamjin Farm in Kangso District and the Ryongho Farm in Ryonggang County,

December 06, 2025

Modern rural dwellings which have been built at the Jamjin Farm in Kangso District and the Ryongho Farm in Ryonggang County,

Art troupe of Korean schoolchildren in Japan arrives in Pyongyang

Art troupe of Korean schoolchildren in Japan arrives in Pyongyang

An art troupe of Korean schoolchildren in Japan headed by Ri Chol Su, principal of Toshun Korean Primary School, arrived in

December 06, 2025

An art troupe of Korean schoolchildren in Japan headed by Ri Chol Su, principal of Toshun Korean Primary School, arrived in

Scientific guarantee provided for solving steel and oil problems

Scientific guarantee provided for solving steel and oil problems

The State Academy of Sciences developed the technologies for producing reduced iron and synthetic fuel oil based on coal

December 06, 2025

The State Academy of Sciences developed the technologies for producing reduced iron and synthetic fuel oil based on coal

Secret of retaining honour of top enterprise for three years

Secret of retaining honour of top enterprise for three years

The Tanchon Smeltery is the one and only business that has been selected as one of the top ten enterprises for three consecutive

December 06, 2025

The Tanchon Smeltery is the one and only business that has been selected as one of the top ten enterprises for three consecutive

Venezuela exposes illegality of US’ ‘anti-drug operations’

Venezuela exposes illegality of US’ ‘anti-drug operations’

The Public Prosecutor General of Venezuela on November 26 exposed and condemned the illegality of the attacks the US is mounting o

December 05, 2025

The Public Prosecutor General of Venezuela on November 26 exposed and condemned the illegality of the attacks the US is mounting o

Vietnamese embassy hosts photo exhibition and reception

Vietnamese embassy hosts photo exhibition and reception

The Vietnamese embassy in Pyongyang hosted a photo exhibition and reception at the Taedonggang Diplomatic Club on December 3 on

December 05, 2025

The Vietnamese embassy in Pyongyang hosted a photo exhibition and reception at the Taedonggang Diplomatic Club on December 3 on

International Day of Persons with Disabilities marked

International Day of Persons with Disabilities marked

A meeting took place at the Central Youth Hall in Pyongyang on December 3 to mark the International Day of Persons with

December 05, 2025

A meeting took place at the Central Youth Hall in Pyongyang on December 3 to mark the International Day of Persons with

New houses built in North and South Phyongan provinces

New houses built in North and South Phyongan provinces

New villages have been built at the Chongok Farm and the Jasan Farm in Phyongsong City of South Phyongan Province and the

December 05, 2025

New villages have been built at the Chongok Farm and the Jasan Farm in Phyongsong City of South Phyongan Province and the

Institute of Agricultural Science built in South Phyongan Province

Institute of Agricultural Science built in South Phyongan Province

South Phyongan Province has newly built the Institute of Agricultural Science. The comprehensive research base with research

December 05, 2025

South Phyongan Province has newly built the Institute of Agricultural Science. The comprehensive research base with research

More Articles