دانلود رایگان مقاله انگلیسی, ملاحظات توان راکتیو در تحلیل قابلیت اطمینان سیستم های فتوولتائیک

Reactive Power Considerations in Reliability Analysis of Photovoltaic Systems

تاریخ انتشار : 2012

نوع مقاله : IEEE CONFERENCE PUBLICATIONS

تعداد صفحات : 6

Abstract—Reactive power is very essential in maintaining

voltage stability of power systems. The voltage constraint at

network nodes due to reactive power deficit or insufficiency of

reactive power sources restricts active power delivery to the loads

and could result in forced load curtailment. Limited attention has

been given to reactive power aspect in reliability evaluation of

power systems with penetration of renewable energy sources. The

reactive power issues become more significant in distributed

generation using renewable energy sources such as photovoltaic

(PV) Cells, which operate mostly at unity power factor. This

paper investigates the effect of reactive power shortage on

reliability of power systems with significant penetration of PV

cells. The IEEE 14-Bus system is utilized to perform this study. A

measure of Expected Energy Not Supplied (EENS) on account of

reactive power shortage and voltage violation in network is

calculated. By using conventional Monte Carlo simulation, the

results are compared with the case without taking into account

reactive power and voltage violation constrains. This paper

suggests that placement of the PV in the network can greatly

reduce active and reactive power shortage during the

contingencies. The reactive power is studied here from design and

planning perspectives for reliable and stable power system

operation when high penetrations of PV energy sources are

present.

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