Stochastic Evaluation of Voltage in Distribution Networks Considering the Characteristic of Distributed Generators
As the probabilistic load flow (PLF) approach is often applied in the assessment the voltage in the distribution system with the distributed generation,the intermittent power output of the distributed generators (DGs) should be more considered.The power variation characteristics of load and distributed generators should be treated separately.In this paper,taking the PV arrays for the typical example,the probability density function (PDF) of the DG is derived from the mathematical model of the power source and the PDF of its uncertain variables.The stochastic voltage evaluation via the PLF is processed by the 2 point estimate method (2 PEM).Besides,the possible network configurations with the relative probability are also considered,for analyzing the comprehensive case for the occurrence of network change.The proposed method will be tested with the modified IEEE 13-nodel feeder test system,and the data for the probabilistic evaluating features of all the nodal voltages distribution are obtained.The results can be used to help know the general and complete voltage effects.
distribution network:distributed generators (DGs) stochastic evaluation:probabilistic load flow (PLF):probabilistic density function(PDF)
Zhe Zhang Gengyin Li Song Wang Jinhao Wang Zhigang Wang
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Shanxi Electric Power Research Institute Shanxi,Taiyuan 030001,P.R.China
国际会议
威海
英文
1132-1137
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）