Research On Nuclear Power Unit Participate In Ancillary Service

Ancillary services mainly refer to various measures to ensure the safety of electric power system and the eligibility of electric energy quality, and measures to realize electric power transmission and transaction. Aucillary services are special power commodities, they play an important part in safe and stable operation of electric power system. In different power markets, the type and number of required ancillary services vary as a result of differences of power grid structures, distribution characteristics of power source and load, load-frequency and load-voltage characteristics.Nuclear energy is a clean, environmental-friendly and economical energy source. At present, nuclear power plant is one of the power source which is vigorously developed by our country in special and by many other countries worldwide in general. Normally, for the reasons of safety and economy, nuclear power plant is operated with base load and constant power, and basically, it is not used for power system regulation, such as peak load regulation and load following. In recent years, with the electricity demand growing rapidly, the peak-valley difference has been increasing gradually, which makes power system regulation more difficult. In such case, whether it is necessary or possible to use nuclear power plant as ancillary service become a question which is worth investigating and studying, and how can nuclear power plant be a part of ancillary service also become a question which is attracting more attention.This article is written in the light of actual situation in our country to focus analysis on the current situation of ancillary services in the southern region, to study the feasibility and necessity of being a part of ancillary services for the nuclear power units province in terms of technology, economy and policy, to straighten out the relationship between nuclear power units and pumped storage hydropower plants, to solves the connecting problem between nuclear generators'participating in assistant service and paying pumped-storage rental fee, to give constructive opinions on how to work out the policy for using nuclear power units as ancillary services so as to improve operation standard and ensure the safety, stability and economy of electric power system.