Voltage Control in the Future Power Transmission Systems

Qin, Nan

doi:10.1007/978-3-319-69886-1

Cited by 6 publications

(7 citation statements)

References 51 publications

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“…Proračun tokova snaga svodi se na rešavanje sistema nelinearnih jednačina koga čine relacije (2.7) za svaki PQ i PV čvor, i relacije (2.8) za sve PQ čvorove. U svakoj iteraciji Newton-Raphsonove metode rešava se sledeći linearizovani sistem jednačina [5]:…”

Section: Klasični Model Tokova Snagaunclassified

Proračun Tokova Snaga Sa Uvaženom Udaljenom Regulacijom Napona

Brkušanin

2024

Zbornik radova FTN

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U ovom radu je predstavljeno proširenje klasičnog modela tokova snaga sa ciljem da se uvaži efekat udaljene regulacije napona. Udaljena regulacija napona podrazumeva da se u svakoj zoni elektroenergetskog sistema definiše po jedan pilot čvor u kome se reguliše napon tako što se menjaju proizvodnje reaktivnih snaga generatora u datoj zoni. Proširenje klasičnog modela tokova snaga se sastoji u uvođenju dva nova tipa čvorova: PQV i P. Predstavljeni model tokova snaga je verifikovan na primeru mreže od 30 čvorova, a rezultati su prikazani i komentarisani u radu.

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Section: Klasični Model Tokova Snagaunclassified

Proračun Tokova Snaga Sa Uvaženom Udaljenom Regulacijom Napona

Brkušanin

2024

Zbornik radova FTN

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“…is negative, the system will remain unstable after the voltage drop as the rate of change is less than zero. Here as (7):…”

Section: Oltc and Voltage Stability Limitations Analysesmentioning

confidence: 99%

“…As voltage instability is a dynamic process, the real power-bus voltage (P-V) curve can be used to obtain a better understanding of voltage analyses in stability studies [6]. The transferred power loss and the voltage drop are involved in system voltage instability [7]. Voltage drops occur due to heavy loads or large disturbances and causes an increase in the system currents.…”

Section: Introductionmentioning

confidence: 99%

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

Alkahdely

Alsammak²

2023

Bulletin EEI

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As electrical grids have expanded significantly, so too has the load on network buses. This, however, causes voltage drops to occur at the load side of the grid. A voltage drop causes a system to become unstable, increases its power loss, and reduces the amount of power that it transfers before finally leading to a collapse. An on-load tap changing (OLTC) transformer can be used to prevent the negative effects of an increased load by restoring the load voltage to its base value when sudden disturbances occur in the source. However, incorrect OLTC placement can cause the system to become unstable and cause collapse. This is referred to as the reverse action phenomenon of an OLTC. Therefore, this present study examined improving the ability of an OLTC to increase system stability and prevent collapse. A simple radial power distribution system was modelled in MATLAB. The results indicate that the proposed model can increase system stability and prevent collapse.

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“…The adjustable range of a VSR can be adjusted from the rated reactive power to half the capacity. Moreover, the speed of adjustment is determined by the operation time of the applied tap-changer, which is generally approximately several seconds [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…For example, in the event of a grid fault, immediate compensation of reactive power is required to maintain the voltage stability of the power system. In order to control reactive power continuously and dynamically, SVC or STATCOM adjusts reactive power very quickly and continuously through power electronic devices [7,8]. However, FACTS systems such as SVC and STATCOM are more expensive than passive compensation devices.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Reactive Power Control with a Variable Shunt Reactor and an Inverter-Based Wind Power Plant

Song

Kim

2022

Energies

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Underground or submarine cables have a higher capacitance component than overhead lines, and they inject a large amount of capacitive reactive power into the system. A separate reactive power compensation device is required in order for a wind power plant (WPP) connected to the public network with a cable to meet the reactive power requirements required by the grid code. In this paper, a reactive power control using a variable shunt reactor (VSR) was proposed to satisfy the reactive power requirement required by the grid code for a WPP connected to the grid through a cable. The proposed reactive power control method compensates for the capacitive reactive power of the cable by using a VSR, and it follows the reactive power command through the reactive power control of a WPP. In the section where it is difficult to follow the WPP reactive power command only with the reactive power capacity of a WPP due to cable losses or a cable reactive power compensation error of the VSR, the reactive power control is additionally supported through the hysteresis control of the VSR. The proposed method satisfies the grid codes, and it enables fast and accurate reactive power control. The performance of the proposed method was verified through simulation using MATLAB/Simulink.

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Voltage Control in the Future Power Transmission Systems

Cited by 6 publications

References 51 publications

Proračun Tokova Snaga Sa Uvaženom Udaljenom Regulacijom Napona

Proračun Tokova Snaga Sa Uvaženom Udaljenom Regulacijom Napona

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

Coordinated Reactive Power Control with a Variable Shunt Reactor and an Inverter-Based Wind Power Plant

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