Discussion on Smart Grid Supporting Technologies

Abstract

Power grid intellectualization is an important method to promote the development of renewable energy source and implement energy conservation and emission reduction. Along with the increasing development of power electronics, IT and communication technologies, the construction of smart grid is becoming an important development direction of electric power industry. At first the necessity of developing smart grid is demonstrated; then the required performance of smart grid are introduced, including self-government and self-healing ability, defensive quality, compatibility of power grid, high efficient operation and management, outstanding quality and friendliness, convenience of power transaction. It is pointed out that to implement smart grid it is necessary to strengthen the research and development in two respects, i.e., the basic technologies and realization of functions. Basic technologies for smart grid mainly contain four issues, namely power equipments, measurement and communication devices, information management system, decision-making and control theory; the realization of functions mainly contain five issues, namely smart control centre, smart substations, smart transmission and distribution lines, smart relay protection system and smart demand side management. Finally, the performance appraisal system is briefly dissertated in power grid performance, economic effect and social effect. Solution of above-mentioned problems will contribute to the deep study and application of smart grid. 電網智能化是促進可再生能源發展、實現節能減排的重要手段。隨著電力電子、IT、通信等技術的不斷發展,智能電網將成為電力工業的重要發展方向。文章首先論證發展智能電網的必要性;介紹智能電網的性能要求,包括:自治和自愈能力、防御能力、電網兼容性、高效運營和管理、優質和友好性、電力交易的方便性。指出智能電網的實現需要加強基礎技術和功能實現2方面的研發:基礎技術主要包括電力設備、量測和通信設備、信息管理系統、決策與控制理論4個方面;功能實現則主要包括智能控制中心、智能變電站、智能線路、智能保護系統、智能需求側管理5個方面。最后從電網性能、經濟效益、社會效益3方面簡要論述智能電網的績效評價體系。上述問題的解決將有助于對智能電網的深入研究和應用。