Transmission System Planning in Power Systems with Wind Generators Considering Available Transfer Capability

doi:10.3969/j.issn.1000-7229.2015.10.011

Abstract

Abstract:

The rapid development of large-scale wind farms results in some new problems for the secure and economic operation of the power system associated. In making transmission system planning, sufficient available transfer capability （ATC） is required so as to accommodate large-scale wind farms, while excessive transmission capacity must be avoided so as to save investment. Given this background, a stochastic optimization model for transmission system planning is presented for a power system with the integration of large-scale wind farms with the following contributions: 1） a probabilistic ATC model is developed with the correlations among random input variables such as wind speed and loads as well as the outage probabilities of generators and transmission lines taken into account；2） a method is employed to solve the probabilistic ATC model by the combined use of the Latin hypercube sampling based Monte Carlo simulation and sensitivity analysis；3） a bi-objective transmission system planning model is presented with transmission investment cost minimized and the expected value of ATC maximized, subject to the acceptable overload probability constraints, and in this way the economics and operation risks associated with a transmission planning scheme could be compromised. Finally, the developed transmission system planning model is solved by the well-established genetic algorithm, and demonstrated by a 18-bus and a 46-bus sample power systems.

Key words: transmission system planning, wind farm, available transfer capability （ATC）, Latin hypercube sampling, sensitivity analysis, correlation

CLC Number:

TM 715

ZHENG Jing, WEN Fushuan, ZHOU Minglei, XU Qian, LIANG Liang, YU Min. Transmission System Planning in Power Systems with Wind Generators Considering Available Transfer Capability[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(10): 73-81.

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