Review of under Frequency Load Shedding Program of Kosovo Power System based on ENTSO-E Requirements

Kabashi, Gazmend; Kabashi, Serbeze

doi:10.11591/ijece.v8i2.pp741-748

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Pada operasi suatu pusat listrik tenaga termis, seperti pusat listrik tenaga uap (PLTU) dan pusat listrik tenaga gas (PLTG), penurunan frekuensi yang besar akan sangat mempengaruhi karakteristik kerjanya, sehingga kemampuannya menurun. Disamping itu pengoperasian turbin diluar frekuensi yang diizinkan dapat menimbulkan kerusakan pada sudu-sudu turbin [8].…”

Section: Pendahuluanunclassified

Studi Skenario Load Shedding Pada Penyulang Dalam Operasi Sistem Tenaga Listrik Menggunakan Under Frequency Relay

Sofyar¹

2020

eltikom

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Pada operasi sistem tenaga listrik, pensuplaian tenaga listrik ke konsumen dikatakan baik apabila besarnya tegangan dan frekuensi yang diterima sesuai dengan yang ditentukan dan masih dalam batas toleransinya. Load shedding atau pelepasan beban pada penyulang dilakukan secara otomatis dengan menggunakan under frequency relay (UFR). Pada penelitian ini dibuat simulasi program komputer untuk menganalisis tahapan load shedding yang digunakan oleh PT. PLN (Persero) Sektor Barito sehingga dapat diketahui respon frekuensi akhir setelah dilakukan pelepasan beban dan selanjutnya mencoba memberikan usulan tahapan peleasan beban yang lain untuk mendapatkan respon frekuensi yang baik. Pada output dari simulasi program diperlihatkan untuk pembebanan maksimum 77,9 MW, frekuensi akhirnya adalah 50,61 Hz dan untuk pembebanan minimum 53 MW, frekuensi akhirnya sebesar 50,02 Hz dengan kondisi sistem kehilangan satu unit pembangkit (skenario pertama). Kemudian untuk kondisi sistem kehilangan dua unit pembangkit terbesarnya (skenario kedua), pada pembebanan maksimum 77,9 MW dan minimum 53 MW, frekuensi akhinya masing-masing sebesar 49,7 Hz dan 50,3 Hz.

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Section: Pendahuluanunclassified

Studi Skenario Load Shedding Pada Penyulang Dalam Operasi Sistem Tenaga Listrik Menggunakan Under Frequency Relay

Sofyar¹

2020

eltikom

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“…The design and calculation the amount of load shedding is a complex process, requiring large amounts of input data on incident situations that cause serious frequency attenuation. Conventional load-shedding methods typically use load shedding relays [7][8][9][10][11] with step-by-step load shedding that correspond to levels of frequency attenuation or df/dt [12]. Most of these methods, the power of load that need to be cut in the form of load shedding tables is built by the electrical system specialist.…”

Section: Introductionmentioning

confidence: 99%

Minimize the load reduction considering the activities control of the generators and phase distance

Nghia

Anh

Binh³

et al. 2021

IJECE

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This study shows how to calculate the minimum load that needs to be reduced to restore the frequency to the specified threshold. To implement this problem, the actual operation of the electricity system in the event of a generator outage is considered. The main idea of this method is to use the power balance equation between the generation and the load with different frequency levels. In all cases of operating the electrical system before and after the generator outage, the reserve capacity of other generators is considered in each generator outage situation. The reduced load capacity is calculated based on the reciprocal phase angle sensitivity or phase distance. This makes the voltage phase angle and voltage value quality of recovery nodes better. The standard IEEE 9-generator 37-bus test scheme was simulated to show the result of the proposed technique.

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“…The underfrequency load shedding relay (UFLS) is the traditional load shedding method used quite commonly in the current power system. In [4], the relays are set to operate whenever the frequency drops to a specified level and a fixed amount of load power is shed to restore the frequency. Using under frequency load shedding relay to disconnect the load bus will make in insufficient or excessive load shedding and take a long time to restore the frequency back to stable.…”

Section: Introductionmentioning

confidence: 99%

A voltage electrical distance application for power system load shedding considering the primary and secondary generator controls

Nghia¹,

Anh²,

Binh³

et al. 2019

IJECE

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This paper proposes a method for determining location and calculating the minimum amount of power load needed to shed in order to recover the frequency back to the allowable range. Based on the consideration of the primary control of the turbine governor and the reserve power of the generators for secondary control, the minimum amount of load shedding was calculated in order to recover the frequency of the power system. Computation and analysis of the voltage electrical distance between the outage generator and the loads to prioritize distribution of the amount power load shedding at load bus positions. The nearer the load bus from the outage generator is, the higher the amount of load shedding will shed and vice versa. With this technique, a large amount of load shedding could be avoided, hence, saved from economic losses, and customer service interruption. The effectiveness of the proposed method tested on the IEEE 37 bus 9 generators power system standard has demonstrated the effectiveness of this method.

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Review of under Frequency Load Shedding Program of Kosovo Power System based on ENTSO-E Requirements

Cited by 5 publications

References 1 publication

Studi Skenario Load Shedding Pada Penyulang Dalam Operasi Sistem Tenaga Listrik Menggunakan Under Frequency Relay

Studi Skenario Load Shedding Pada Penyulang Dalam Operasi Sistem Tenaga Listrik Menggunakan Under Frequency Relay

Minimize the load reduction considering the activities control of the generators and phase distance

A voltage electrical distance application for power system load shedding considering the primary and secondary generator controls

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