A Modified Control Topology to Improve Stability Margins in Micro-grids with Droop Controlled Inverter Based Distributed Generation

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

Electrical power systems are major contributors to the greenhouse gas emissions. Recent efforts to tackle the effects of global warming have made renewable energy-based distributed generation (DG) an important player in electrical power production. This led to the introduction of new concepts in the field of electrical power that would help harness the advantages offered by these renewable energy-based DGs, such as the micro-grid. Such new topologies, however, present their own challenges. Droop control techniques of Inverter Based Distributed Generation (IBDG) are generally the most common approach for controlling micro-grids especially in the islanded mode of operation. However, these techniques suffer from slow transient response in addition to inefficient power sharing under weak system conditions. An improved transient response as well as better load sharing can be achieved using higher droop gains. However, large droop gains drive the system into the unstable region. In this work, a new control topology is proposed to facilitate the use of higher droop gains. The advantages of the proposed control topology are proven through small-signal stability analysis. The controller gains are optimally determined using Particle Swarm Optimization (PSO). The control gain selection problem is formulated as a constrained optimization problem where the main objective is to maximize the droop gain while maintaining micro-grid stability and adequate dynamic performance. The proposed control topology with its optimal parameters is verified through tests on a micro-grid with three IBDG units in the MATLAB/SIMULINK environment. The results show that the proposed P-PID-PD controller facilitates the use of much higher droop gain values at higher stability margins compared to the commonly used PI-PI-P control topology.

روابط وملفات

التعريف والنوع

رقم الوثيقة

05f28f12-5506-451d-b475-1bab8ab953be

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

2284140_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"Hatem Zein El din ","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Nadim H. Kan'an","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

A Modified Control Topology to Improve Stability Margins in Micro-grids with Droop Controlled Inverter Based Distributed Generation

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Topology Renewable Energy Electrical Power

إشراف وإعداد

الإشراف

Hatem Zein El din

الإعداد

Nadim H. Kan'an

الاقتباسات الببليوغرافية