Power Sharing Berbasis Hirarki Kontrol Pada Sistem Dc Microgrid Tegangan Rendah Dengan Mempertimbangkan Kondisi Soc Baterai

Effendy, Machmud (2023) Power Sharing Berbasis Hirarki Kontrol Pada Sistem Dc Microgrid Tegangan Rendah Dengan Mempertimbangkan Kondisi Soc Baterai. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

DC microgrid (DCMG) merupakan jaringan listrik mandiri bertegangan direct current (DC), dimana sumber energinya berasal dari energi terbarukan seperti matahari, dan menggunakan baterai sebagai penyimpan energi. DCMG terdiri dari beberapa DC generation (DCG) dan baterai yang saling terhubung antara satu dengan lainnya, sehingga antar DCG dan antar baterai dapat melakukan power sharing. Power sharing sangat di perlukan dalam jaringan DCMG karena dapat menjaga kestabilan tegangan DC bus saat terjadi fluktuasi beban dan sumber listrik, menjamin ketersediaan daya listrik, dan memperpanjang umur baterai, karena adanya keseimbangan state of charge (SoC) baterai. Oleh karena itu, tujuan penelitian ini adalah merancang dan membuat strategi kontrol untuk meningkatkan power sharing antar DCG dan juga meningkatkan keseimbangan SoC antar baterai. Untuk mencapai tujuan tersebut, penelitian ini menggunakan dua level hierarki kontrol dalam sistem DCMG yaitu primary control dan seondary control. Primary control yang di dalamnya terdapat adaptive droop control berfungsi menyetel (tuned) droop resistance, sehingga daya beban dapat disuplai secara proporsional oleh pembangkit, meskipun terdapat perbedaan resistansi penghantar (Rline). Teknik adaptive droop control berbasis fuzzy logic ini juga mampu menyeimbangkan SoC beberapa baterai saat kondisi charging dan disharging. Untuk merestorasi tegangan DC bus akibat penggunaan droop control, maka secondary control diterapkan, sehingga deviasi tegangan DC bus dapat di minimalisasi. Hasil simulasi dan eksperimen membuktikan bahwa pembangkit DC yang menerapkan adaptive droop control mampu membagi rasio daya beban antar sumber pembangkit DC mendekati 1:1. Sedangkan keseimbangan SoC di semua baterai dapat mencapai 100% , meskipun level SoC awal pada masing-masing baterai berbeda. Sedangkan drop tegangan DC bus mampu direstorasi menggunakan secondary control, baik saat terjadi perubahan daya pembangkit maupun daya beban.
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DC microgrid (DCMG) is an independent electricity network with direct current (DC) voltage, where the energy source comes from renewable energy such as the sun, and batteries are used as energy storage. DCMG consists of several DC generations (DCG) and batteries that are connected to each other, so DCGs and batteries can share power. Power sharing is very necessary in the DCMG network because it can maintain the stability of the DC bus voltage when there are fluctuations in the load and power source. Furthermore, it guarantees the availability of electric power, and it also extends battery life due to the state of charge (SoC) balance of the battery. The purpose of this research is to design and create a control strategy to increase power sharing between DCGs and also improve the SoC balance between batteries. To achieve this goal, this study uses primary control and secondary control as two hierarchical levels of control in the DCMG system. The primary control in which there is adaptive droop control can set the droop resistance, so that the load power can be supplied proportionally by the generator, even though there are differences in the resistance of the conductors (Rline). adaptive droop control based on fuzzy logic is also able to balance the SoC of several batteries during charging and discharging conditions. To restore the DC bus voltage due to the use of droop control, secondary control is applied, so that the deviation of the DC bus voltage can be minimized.
Simulation and experiment results have proven that a DC generator that implements adaptive droop control is able to divide the load power ratio between DC generator sources close to 1:1. Meanwhile, the SoC balance in all batteries can reach 100%, even though the initial SoC level in each battery is different. Furthermore, the DC bus voltage drop can be restored using secondary control when there is a change in generating power or load power.

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	DC microgrid, keseimbangan SoC baterai, power sharing, balancing on SoC of the batteries
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20001-(S3) PhD Thesis
Depositing User:	Machmud Effendy
Date Deposited:	26 Jul 2023 03:50
Last Modified:	26 Jul 2023 03:50
URI:	http://repository.its.ac.id/id/eprint/99492

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