Hu K.,Tsinghua University |
Chen L.,Tsinghua University |
Chen Q.,Tsinghua University |
Wang X.-H.,Inner Mongolia Power Group Co. |
And 3 more authors.
Energy | Year: 2017
Due to the nature of fluctuation and intermittence, integration of renewable energy sources (RESs) requests more flexibility of power systems. However, the “heat-led” operation mode limits the adjustability of combined heat and power (CHP) plants, and reduce the accommodation of RESs. This paper studies an integrated thermal and power system and introduces a phase-change heat storage (HS) facility into the CHP plant to improve the adjustability, where the heat released from the extraction steam is not consistent to the heat load at each moment. Furthermore, the heat transfer processes in the HS facility are modelled as a thermal resistance network, which provides the feasibility for analyzing the integrated system in a unified model. On this basis, the operation plan of the integrated system is optimized by the linear programming (LP) method to minimize the wind energy loss. The results show that: 1) HS facility installation increases the flexibility of power system, and reduces the wind energy loss from 18.7% to 11.2%. 2) Heat transfer processes should be carefully taken into account for precisely setting the power generations of each plant. 3) The phase-change temperatures of HS materials should be between 90 °C and 100 °C for the maximum wind power accommodation. © 2017 Elsevier Ltd
Cheng X.,University of Sichuan |
Cheng W.,Inner Mongolia Power Group Co. |
Wang H.,University of Sichuan |
Du Z.,University of Sichuan
Gongneng Cailiao/Journal of Functional Materials | Year: 2017
Hydroxy-terminated polypropylene glycol, carboxyl-terminated polypropylene glycol and epoxy-terminated polypropylene were used to modifiy epoxy resin. Dynamic mechanical thermal analysis, impact strength and scanning electron microscopy were used to study the modified epoxy resin. The glass transition temperature(Tg)of epoxy resin firstly increased and then decreased as the adding amount of hydroxy-terminated polypropylene glycol increased, and phase seperation appeared. The compatibility increased when carboxyl-terminated polypropylene glycol was used as modifier, and phase seperation appeared in larger adding amount. Phase separation didn't exist when epoxy-terminated polypropylene was used. The variation of impact strength of three different modified epoxy resin consisted with the variation of phase seperation of modified epoxy resin. Test results show that the toughness of epoxy resin is enhanced by way of plasticization when adding hydroxy-terminated polypropylene glycol and when adding epoxy-terminated polypropylene glycol, the toughness is enhanced by way of increasing the flexibility of the crosslinked networks. © 2017, Chongqing Functional Materials Periodical Press Co. Ltd. All right reserved.
Zhang X.,Nanjing University of Science and Technology |
Gao Z.,Inner Mongolia Power Group Co. |
Chen Q.,Nanjing University of Science and Technology
Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology | Year: 2013
For the band-limited networked control systems(NCSs), transmission deadbands with different deadband scheduling policies are set at the sensor and controller respectively. The signal difference-based scheduling policy is adopted at the sensor node, and the system state error-based one is adopted at the controller node. The model of NCSs is established considering the deadband scheduling, the network-induced time delay and the data packet dropout. The design method of controller is given for guaranteing the exponent stability of NCSs. The semi-physical simulative experiments with the real network and the simulative controlled plant are carried out. The experiment results indicate that the network traffic of sensors and controllers is reduced obviously by the proposed approach with the system stabilization.
Zhao G.T.,Inner Mongolia Electrical Power Research Institute |
Yang B.F.,Inner Mongolia Electrical Power Research Institute |
Zhang H.B.,Inner Mongolia Power Group CO. |
Lu H.J.,Inner Mongolia Electrical Power Research Institute
Applied Mechanics and Materials | Year: 2014
Given the characteristics of power distribution grid project including the huge amount of investment, long construction period, long investment payback period and so on, the precision of investment estimate has a tremendous influence on decision making, economic effect and cost control in each stage. By way of introducing the current situation of investment estimate of power distribution grid project, and analyzing the key factors affecting the investment estimate precision including investment decision-making and management, project design plans, risk and the investment estimate preparation, this paper puts forward improvement strategies aiming at influencing factors in order to promote the rapid development of power distribution grid project in Inner Mongolia. © (2014) Trans Tech Publications, Switzerland.
Bai Y.,Tianjin University |
Fang D.,Tianjin University |
Hou Y.,Tianjin University |
He X.,China Electric Power Research Institute |
Zhu C.,Inner Mongolia Power Group Co.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010
The solutions of real-time online monitoring and control in power network dispatch center for large-scale wind farms are discussed and the structure and functions of the real-time online monitoring and control system are introduced. The integrated communication management terminal installed in wind farm communicates with the local monitoring and control systems via OPC interface to acquire wind farm data and then sends the data through power dispatch data network or green channel to the monitoring and control master system in dispatch center. According to the dispatch instructions, the master system sends the settings of power control and voltage control to the integrated communication management terminal of controlled wind farms to online control the active power of wind farm and bus voltage of step-up substation for the AGC (Automatic Generation Control) and AVC(Automatic Voltage Control) of large-scale wind farms. The introduced system has been operated in the dispatch center of the west Inner Mongolia power grid.
Shang L.-Q.,University of Science and Technology of China |
Liu X.-F.,University of Science and Technology of China |
Lv D.-N.,University of Science and Technology of China |
Lv D.-N.,Inner Mongolia Power Group Co.
Advanced Materials Research | Year: 2014
In this paper, the substation electrical simulation system was designed on the MCGS development platform. The designs include simulation system interface design, database establishment, component modeling, and operating process design. The simulation system not only can simulate the substation switching operation and the fault, but also has the functions of real-time data, historical data and alarm records. The designed simulation system is simple, clear, and easy to use. It can be applied to the teaching and training of the substation operator. © (2014) Trans Tech Publications, Switzerland.
Du J.,Chinese Academy of Agricultural Sciences |
Zhang J.,Chinese Academy of Agricultural Sciences |
Guo Z.,Inner Mongolia University of Technology |
Shi W.,Inner Mongolia Power Group Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2014
A sun-tracking system was developed in order to improve the collection efficiency of solar air collector and receive more solar energy. Several main tracking modes were briefly introduced. The passive-tracking mode was likely to be perplexed by weather condition and the active-tracking mode could not avoid the cumulative error. A single-axe automatic tracking mode which combined active-tracking mode and passive-tracking mode wais presented. The proposed combined mode overcame the shortcomings of the two modes. Experiments showed that this system works with high precision, good stability and little loss of solar energy. Automatic tracking system could make the collector outlet temperature increased an average of 15℃, so that the collector efficiency was improved. ©, 2014, Chinese Society of Agricultural Machinery. All right reserved.
Wang Y.,CAS Institute of Electrical Engineering |
Wang S.,CAS Institute of Electrical Engineering |
Yu Y.,Inner Mongolia Power Group Co. |
Li J.,CAS Institute of Electrical Engineering
Advanced Materials Research | Year: 2013
Wind power generation has made great development in China in recent years. The paper researches on development course of wind power in Inner Mongolia region, where wind power resources is richest in China and the installed capacity of wind power is largest, and proposes the suggestions of the related development mode and policy. China wind power represented by Inner Mongolia has just experienced rapid growth. The rapid growth of the scale also brings some problems. China government shall refer to development mode and current situation of the countries with a higher development degree of wind power, consider the specific situation of China, timely adjust development mode of wind power, and improve wind power planning and related policies to guide China wind power to continue fast healthy development. Thus, improve the utilization level and sustainable development ability of renewable energy in China. © (2013) Trans Tech Publications, Switzerland.
Liu S.,Inner Mongolia University of Technology |
Guo L.,Inner Mongolia University of Technology |
Kang L.,Inner Mongolia Power Group Co.
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2012
Wind farm group integrated system consists of many Large-Scale a single wind farm, which will have a total capacity of 1,000MW (and above). Reactive- power fluctuation of Wind farm group will seriously worse the voltage in limited area nearby.However, Reactive power optimization is limited to the regulation of reactive power of a single wind farm mostly, that cannot satisfy the demand of voltage regulating for local power system. Using the voltage level of PCC and integrated substation as a target function, this paper applies an efficient method based on genetic algorithm to extract reactive power compensation point and optimize reactive power compensation capacity of STATCOM. Taking wind power system within Inner Mongolia Huitengxile district power network as an example, the simulation results show that this method is valid to prevent voltage collapse. © 2012 IEEE.
Gao Z.-N.,Nanjing University of Science and Technology |
Gao Z.-N.,Inner Mongolia Power Group Co. |
Xie R.-H.,Nanjing University of Science and Technology |
Fan W.-H.,Nanjing University of Science and Technology |
Chen Q.-W.,Nanjing University of Science and Technology
Kongzhi yu Juece/Control and Decision | Year: 2012
Considering the characteristics in wireless networked control systems (WiNCS), limited network bandwidth, limited node energy and high network collision probability, the signal difference-based transmission deadband is set up in sensors and controllers to reduce network collision and node energy consumption. Then, with the consideration of the probability distribution of delay in some intervals and parametric uncertainties, a model of WiNCS is established based on transmission deadband, and the H ∞ controller is designed. Results of the semi-physical simulative experiments with real wireless network and simulative controlled plant show that the network traffic of sensors and controllers is reduced obviously by using the proposed approach on the basis of the system asymptotical stabilization.