توزیع اقتصادی توان در نیروگاه‌ها با در نظر گرفتن آلاینده‌های زیست‌محیطی و شاخص‌های پایداری سیستم با استفاده از الگوریتم جستجوی هارمونی چندهدفه
محورهای موضوعی : مهندسی برق و کامپیوترحسین شریفی 1 , محمود اوکاتی صادق 2
1 - دانشگاه سیستان و بلوچستان
2 - دانشگاه سیستان و بلوچستان
چکیده مقاله :
حساسیت افکار عمومی نسبت به مسایل زیست‌محیطی در مسئله پخش بار اقتصادی نیز تأثیرگذار می‌باشد و در این صورت لازم است تابع هزینه مربوط به آلودگی نیز در مسئله پخش بار اقتصادی در نظر گرفته شود. قبل از معرفی مفهوم امنیت سیستم قدرت، مسئله پخش بار اقتصادی به‌طور معمول بر جنبه‌های اقتصادی بهره‌برداری متمرکز بود تا بر جنبه‌های امنیتی سیستم. امروزه با گستردگی شبکه قدرت و افزایش بار، ترکیب شاخص‌های پایداری شبکه با مفهوم پخش بار اقتصادی به یک ضرورت مهم تبدیل شده است. این مقاله به حل مسئله پخش بار اقتصادی با در نظر گرفتن مسئله آلایندگی نیروگاه‌ها و شاخص‌های امنیتی شبکه می‌پردازد. شاخص‌های امنیتی سیستم توسط توابع پنالتی به تابع هدف مسئله پخش بار اقتصادی اضافه شده است. از آنجایی که کاهش هزینه‌های سوخت و آلایندگی دو هدف نسبتاً متضاد می‌باشند حل مسئله توزیع اقتصادی توان و کاهش آلایندگی به یک مسئله بهینه‌سازی چندهدفه منجر می‌شود. پیچیدگی توابع هدف و لزوم در نظر گرفتن قیود بهره‌برداری نیروگاه‌ها و شاخص‌های امنیتی نیاز به استفاده از روش‌های کارامد بهینه‌سازی را بیش از پیش آشکار می‌کند. در این مقاله الگوریتم جستجوی هارمونی چندهدفه (MOHS) برای حل مسئله به کار گرفته شده است. نتایج نشان می‌دهد که MOHS از جهت همگرایی و دقت از قابلیت بسیار خوبی نسبت به سایر روش‌های به کار گرفته شده برخوردار است. سیستم تست به کار رفته برای حل مسئله پیشنهادی، سیستم تست IEEE با 10 واحد نیروگاهی، 39 باس و 46 خط انتقال می‌باشد.
Public sensitivity to environmental issues in the economic dispatch is also impressive. In this case it is necessary to consider the costs of pollution in the economic dispatch. Before the introduction of the concept of power system security, the subject of economic load dispatch normally focused on economic aspects rather than security of the system. Today, with the expansion of the power grid and system load, combination of stability and economic load dispatch indices has become a critical necessity. This article will consider the issue of solving the economic dispatch of power plants considering the emissions and security indices of the network. Using penalty functions, system security indices are added to the objective function of economic load dispatch problem. Since fuel costs and emission reduction targets are relatively contrasting, problem solving of economic load dispatch and emission reduction leads to a multi-objective optimization problem. Given the complexity of objective functions and necessity of the considering the practical constrains of power plants operation and security indices reveal more than ever the need to use efficient methods to optimize. In this article Multi Objective Harmony Search algorithm (MOHS) has been used to solve the problem. The results show that MOHS algorithm is excellent for convergence and accuracy compared to other employed methods. The proposed testing system used to solve the problem is IEEE test system with 10 power generation units, 39 bus and 46 transmission line.
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