Research On The Subsidy Method Of Small Hydro Power Network Based On Whole Life Cycle

The large-scale development of small hydropower will eventually face all distributed power will face the interconnection, but large-scale grid connected distributed generation will change the trend of grid distribution, resulting in a new power quality problems. The theoretical research shows that the microgrid can guarantee the operation stability of the power grid and distributed power supply and satisfy the large-scale access. Take into account this, this paper discusses the small hydropower model will be applied to the future development of small hydropower. However, due to the micro grid is a collection of a variety of distributed power supply and device and energy management system of autonomous operation management system is to store a large amount of energy, small hydropower and micro pattern inevitably will result in an increase in the cost of power generation, plus a small hydropower itself is a weak public products. Therefore, it is necessary to subsidies for the study of specific subsidies to ensure the sustainable development of small hydropower has essential significance.Firstly the life cycle theory in the field of engineering application, the domestic and foreign multi energy complementary micro, small hydropower and micro net subsidy methods of research, clarifies the rules and find out the existing problems. Then introduced several common small hydropower generation mode, including off the grid, distributed small hydropower and micro three class. Based on the impact analysis which small hydropower in distributed directly incorporated into the power grid of the grid voltage fluctuation, power factor, power supply reliability, relay protection and automatic device set generated, Taking voltage as an example, the grid voltage characteristics were comparative simulation for distributed small hydropower and small hydropower micro grid, results show: Small Hydropower microgrid can significantly alleviate the small hydropower grid of the grid voltage fluctuation. Then the small hydropower microgrid components in accordance with the cost of unit life cycle cost deconstruction principle layer decomposition to facilitate cost estimation and evaluation, and were constructed including the initial investment cost, maintenance of life cycle cost cost and operation cost of small hydropower, small hydropower and micro grid two power model the model, combined with the annual generating capacity of small hydropower regression prediction model were obtained the final calculation model the unit cost of power generation, and a practical example is calculated, in the foundation to ensure the generator’s revenue rate of 10% calculated on the specific amount of subsidies, on this basis, finally from the source of subsidies, subsidies and other aspects of life are given subsidies advice.