The Access Of Distributed Photovoltaic Power Station And Its Protection And Control System Research In Hangzhou Area

In recent years at home and abroad to develop the photovoltaic industry, however, because of the influence of Europe and the United States double inverse photovoltaic industry also met great crisis and challenges. Distributed photovoltaic power as a relatively new way of photovoltaic applications, will be more and more used in domestic pv power generation projects, however because of distributed photovoltaic power generation the main distribution network is connected to the electricity grid enterprise, has broken the original distribution network structure and the trend of power grid enterprise management mode. Especially in the safe operation, power quality and line maintenance in terms of technology and management difficulties.Photovoltaic technology after decades of ontology development has very mature, but access to the distribution network is still belongs to the exploration stage for power grid companies, one of distributed photovoltaic access way, protection configuration and control system technology is not mature. Due to a lack of distributed photovoltaic projects comprehensive control and management methods, led to a number of distributed photovoltaic projects grid at a slow pace. So the distribution of photovoltaic power generation how to appear more meaningful access to distribution network, the thesis chapters mainly content is as follows:This paper firstly introduces the background and significance of the topic, simply summarizes the development situation of other countries around the world photovoltaic industry, combined with the status quo of PV development in our country, points out the main direction in the future development of distributed photovoltaic PV development, importance of the research on distributed PV connected into the distribution network, this paper mainly in the following three aspects work:Through the Hangzhou region, the current photovoltaic project construction and operation of research and analysis, put forward several modes of access for distributed power distribution network, and analyses the application characteristics and scope of the pros and cons of various models and the model, with difficulty in the actual existence of access, through the analysis of some typical connection modes commonly used.Analysis of the impact of distributed photovoltaic power access to distribution network, and put forward the corresponding requirement of relay protection device configuration. Combined with the actual situation, the protection configuration scheme for distributed photovoltaic power Grid-connected, conducts the research to the principle and configuration of the side protective system protective side and photovoltaic power station.Research and analysis of the problem of connection of the photovoltaic control system, analyzes the means of distribution and dispatching automation system information access, compared to the information transmission channel quality, combined with the current area of Hangzhou distribution network dispatch automation system, puts forward the future construction of distribution network scheduling system architecture with automatic system and the required function.Finally, through the typical distributed photovoltaic power project access to distribution network, with three kinds of typical connection modes, illustrates the formulation of access, configuration and access to distribution network dispatch automation system of relay protection way.