Yunnan Power Grid Research Articles

Impact of Wind Speed Correlation on Transient Stability of Power System

Wind speeds of different wind turbines in a big wind farm always have correlations because of their close geographical location. This paper builds wind speed model by t-copula function and uses rank correlation matrix to measure the correlation of wind speeds. The case study of IEEE-39 bus system and Yunnan Power Grid shows that wind speed correlation has certain effect on the transient stability of power system.Taking wind speed correlation into consideration makes the analysis of systems transient stability more close to reality.

云南建设智能电网的战略意义

智能电网比常规电网更加安全可靠，可以更好地兼容可再生能源发电并网，世界各地都在规划建设智能电网。国内外电网发展趋势及云南电网面临的众多安全问题都要求云南电网加快智能电网建设。本文从能源开发需求、国家宏观政策及电力体制改革要求、优化电网运行和管理模式、电网安全需要和实现在国内省网公司中的领先地位等五方面探讨了云南电网公司建设智能电网的战略意义。 Smart grid is safer and more reliable than traditional grid, and it’s more compatible for renewable energy generation, and smart grid is being in plan and construction all over the world. The development trend of power grid at home and abroad and many security problems that Yunnan Power Grid faces require Yunnan Power Grid to speed up the construction of smart grid. This article discusses the strategic significance of smart grid construction in Yunnan Power Grid in the five aspects, i.e. the energy development demand, the national macro policy and reform of the electricity management system requirements, optimization of power grid operation and management mode, the power grid security requirements and making Yunnan Power Grid achieve the leading position among all the power grids of China.

云南智能电网建设浅析

云南电网肩负着云南电力供应和电力外送双重任务,自身结构复杂。本文通过分析云南电网现状，对比云南电网与智能电网要求的差距，提出在云南智能电网的建设中要注意：设备是系统的基础，要加强实时、自动化、电器和用户的交互式技术的开发，建设与智能电网相适应的电力市场。 Yunnan power grid has a complex structure and shoulders the dual task of local power supply and power ex-port. In this paper, by analyzing the Yunnan power grid status quo and comparing Yunnan power grid with the smart grid, Yunnan smart grid construction should be advised: as the device is the basis of the system, it is necessary to strengthen the development of real-time automation, the interactive technologies between the electrical appliance and the users, and construct the electricity market which is suitable for the smart grid.

云南新能源发电分析研究

面对日趋严重的环境污染和资源枯竭问题，经济环保的新能源发电越来越多地受到人们的重视。云南风能、太阳能、生物质能及页岩气等新能源储量巨大，开发潜力可观。本文从云南开发新能源的优势和挑战两方面分析了云南新能源发展遇到的问题，分析介绍了一种适合云南电网特点的风光储互补发电系统。 Facing the increasingly serious problems of environmental pollution and resource depletion, new energy power generation which is economic and environmental attracts more and more attention of us. Yunnan Province has huge reserves of new energy, such as wind, solar, biomass, and shale gas, and its potential development is considerable. This paper analyzes the problems of new energy development in Yunnan Province from two aspects: advantages and challenges in the development of new energy, and introduces a kind of wind-light-storage complementary system which is suitable for the characteristics of Yunnan power grid.

Research of TCSC Damping Effect on Low Frequency Oscillation in West Yunnan Power Grid

Based on the analysis of damping theory of Thyristor Controlled Series Capacitor (TCSC), the influence of TCSC to electric magnetic torque with and without damping function is studied by one generator infinite model so to deduce the mechanism of low frequency oscillation damping of TCSC. Combined with ‘the Twelfth Five-year Plan’ power and transmission grid construction plan in western Yunnan, the proper scheme for TCSC damping control was chosen in the southwestern Yunnan power grid and the transient and dynamic simulations of southwestern Yunnan power grid were performed. The simulation results show that TCSC can improve the system damping when the grid is in Yunguang area oscillation mode with frequency of 0.27Hz and 0.6Hz，especially in condition when Yunnan grid is in the local area oscillation mode of 0.6 Hz. The simulations also demonstrate that TCSC can improve transient stability of Yunnan power grid. The application of TCSC in southwestern Yunnan Power Grid is of great significance to power grid safe operation.

The Applied Research of Hydroturbine Prime mover and Governor Modeling of in the Yunnan Power Grid

With the expansion of power system, the system simulation, fault simulation will be one of the most important work to ensure the operation of Yunnan Power Grid safe and stable.It is also proposed newer and higher requirement to the hydroturbine prime mover and governor models in the Yunnan Power Grid which is based on hydroturbine. In this paper, taking the Luoma River Hydropower Second Stage #2 as an example, a new modeling method of hydroturbine prime mover and governor through parameters- measured is proposed.

Research on the Automatic Generation Control (AGC) Coordinated Control Modes between Provincial Dispatching and Regional Dispatching in Yunnan Power Grid

With the constant expansion of Yunnan power grid, in current dispatching Automatic generation Control (AGC) mode, the use effect of small and medium-sized hydropower resources in the unified dispatching was not ideal. By building zoning control model artificially, the control targets and their coordinated relationship between main area and sub-areas are explicitly pointed out .The zoning and layered control mode of AGC between provincial dispatching and regional dispatching is put forward. Analysis and comparison are also made of the “independent zoning and layered control mode” and “coordinated zoning and layered control mode”, and then their existing problems are pointed out. The research can provide the foundation of further study on AGC coordinated control strategies between provincial dispatching and regional dispatching, which can realize single goal and multi-objects of AGC coordinated control in the power grid.