ارائه روشی مبتنی بر روش‌های جمع آثار و امپدانس مرزی برای شناسايي عامل غالب در ايجاد اعوجاج‌های هارمونيکی در باسبار PCC
محورهای موضوعی : مهندسی برق و کامپیوترمجيد مرادلو 1 , حميدرضا کارشناس 2
1 - دانشگاه صنعتی اصفهان
2 - دانشگاه صنعتی اصفهان
کلید واژه: کيفيت توان هارمونيک امپدانس هارمونيکی روش امپدانس مرزی سهم هارمونيکی,
چکیده مقاله :
در اين مقاله روش جديدی ارائه شده است که در آن برای شناسايي عامل غالب در ايجاد اعوجاج‌های هارمونيکی جريان و ولتاژ در باسبار PCC، حداقل نياز به اطلاعات دقيق در مورد امپدانس هارمونيکی مصرف‌کننده‌ها وجود داشته باشد. در روش پيشنهادی با استفاده از روش جمع آثار و تعريف سهم هارمونيکی ارائه‌شده در آن، و نيز ترکيب اين تعاريف با الگوريتم به‌کار رفته در روش امپدانس مرزی، شاخص‌های جديدی تعريف گرديده و الگوريتمی ارائه شده است. با استفاده از اين الگوريتم در شناسايي عامل غالب در ايجاد اعوجاج‌ها، بر خلاف روش امپدانس مرزی در هيچ يک از حالت‌ها نياز به مقادير دقيق امپدانس‌های هارمونيکی مصرف‌کننده نبوده و احتمال تشخيص نادرست در شناسايي عامل غالب حتی در حالت‌هايي که سهم طرفين اين باسبار به هم نزديک باشد، وجود ندارد. اين موضوع به‌وسيله مقايسه روش پيشنهادی با روش امپدانس مرزی نشان داده شده است. همچنين با استفاده از شبيه‌سازی شبکه توزيع صنعتی 13باسه IEEE بر روی نرم‌افزار DIGSILENT، اعتبار روش پيشنهادی بررسی گرديده است.
In this paper, a new method for identification of dominant source in creation of current and voltage distortions in PCC bus is presented. In proposed method, using superposition method along with definition of harmonic contribution and combining them with the critical impedance algorithm, new indices are defined and novel algorithm is presented. In this algorithm contrary to the critical impedance method, there is no need for values of customer's harmonic impedances. Also there is no probability that proposed algorithm lead to incorrect identification of dominant source even in cases in which the shares of PCC sides are close to each other. This fact is shown by comparison between proposed algorithm and critical impedance method. The analysis is verified on IEEE 13-bus test system using DigSilent software.
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