有源配電網(wǎng)供電能力分析研究
[Abstract]:In recent years, with the increasingly prominent problem of energy security and the increasing pressure of environmental protection, renewable energy power generation in the world has developed rapidly. Distributed generation using renewable energy has begun to connect to the distribution network in large quantities, which brings forward new problems and challenges to the operation and planning of the distribution network. Distributed generation with intermittent renewable energy, such as wind and solar energy, has strong randomness and uncertainty, which is often concealed by load fluctuation in the case of low permeability. Traditionally, only the value of its electricity is considered. However, with the increase of the access capacity and quantity of distributed generation, the load supply situation of distribution network will change greatly, more and more loads will be absorbed locally, and the ability of the system to cope with the load growth will be improved. Thus delaying the demand of distribution network upgrade and transformation. Therefore, it is of great significance to evaluate the capacity value of distributed power generation and calculate the power supply capacity of active distribution network scientifically. In this paper, the concept of power supply capacity of active distribution network is established, and the analysis method of power supply capability of active distribution network is proposed. Firstly, a new idea to evaluate the power supply capacity of active distribution network under certain reliability requirements is put forward in view of the shortcomings of traditional power supply capacity calculation method which fails to take into account the matching relationship between power supply and load in time series. Secondly, based on Monte Carlo simulation method, the evaluation method of power supply adequacy in active distribution network is established, and based on this, heuristic load adjustment strategy is adopted. This paper analyzes the ability of distribution network to rely on its own network structure to transfer load and the capacity value of distributed generation, and puts forward a method to evaluate the power supply ability of active distribution network. Finally, the influence of the reliability level of active distribution network, the different load types and the configuration of distributed power source on the power supply capacity is analyzed by an example. It provides a new reference for the planning and operation of distribution network and the optimal configuration of distributed power supply.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM732
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