Research On Reliability Assessment Of Generation And Transmission Systems Integrated With Wind Farms

Nowadays new energy source has been causing more attention from various countries in the world, the wind power is one of the fastest growing energy sources,and is regarded as an important alternative to traditional power generating sources. Enhanced public awareness of the environment has led to rapid wind power growth throughout the world to reduce greenhouse gas emissions associated with conventional energy generation. However, wind generation also has disadvantages as a regular energy source and is considered less reliable than conventional sources. Companies that need to evaluate the implantation of this type of generation are very concerned with the intermittence of the wind and with the uncertainties introduced in the planning and operation of their electric systems.The principles and characteristics of the sequential simulation of Monte Carlo simulation are expressed in the dissertation. Then a model of generation and transmission reliability system is established based on sequential Monte Carlo method, including flow computing, network topology, load reduction model and calculation of reliability index. The reliability evaluations of test system IEEE 14-Bus system as a calculating example to calculate two indicators of generation and transmission system,respectively EDLC and EENS.A new model of the wind farm output power considering multi-wake effect is established according to the probability distribution of the wind speed and the characteristic of the wind generator output power: based on the simple Jenson wake effect model, the wake effect with wind speed sheer model and the detail wake effect model with the detail shade areas of the upstream wind turbines are discussed respectively. When it is combined with the generation and transmission reliability system. An adequacy evaluation algorithm of wind power integration in power systems is presented, including the transmission network failure rate and capability constraints.Corresponding software is programmed according to the Matlab7. The calculations to IEEE-RTS79 test system which wind farm model added is carried out. The reliability index from calculated examples show the value of wind power, and will provide the valuable reference for wind farm operation and planning.