Reliability evaluation method of pumped storage system based on multiple wind power plants
A technology of pumped storage and pumped storage power stations, which is applied in the field of reliability calculation of wind farm power generation systems, and can solve the problems of not taking into account the time series correlation of wind speed of a single wind farm and the influence of reliability evaluation results, etc.
Active Publication Date: 2017-02-22
CHONGQING UNIV +3
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[0004] Existing literature has in-depth research on the reliability of multiple wind farms and the combined system of multiple wind farms and pumped storage, but there are also shortcomings: First, when considering the impact of the correlation of multiple wind farms, it does not take into account The time-series correlation of the wind speed of a single wind farm itself will affect the results of reliability assessment; second, the existing research mainly focuses on the economic operation, capacity ratio, and feasibility of the multi-wind farm-pumped storage combined system. On the other hand, there are few literatures on the reliability research of multi-wind farm-pumped storage combined system
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[0174] In this embodiment, the IEEE-RTS79 system is used to study the impact of joint system access. The wind speed data is the historical wind speed data of Harvey and Karsruhe in North Dakota from 2012 to 2014. A total of 200 2MW wind turbines are installed in the two wind farms. The rated capacity of a single wind turbine is 2MW. The cut-in, rated and cut-out wind speeds are respectively 4, 15, 25m / s. The maximum storage capacity of the upper reservoir of the pumped storage power station is 1.396×106m3, and the minimum storage capacity is 7.88×104m3. The unit capacity of the pumped storage power station is 250MW, that is, the power of pumping water and power generation can be varied within the range of 0-250MW. Since the climbing speed of the hydroelectric unit is fast, its climbing time is ignored.
[0175] The reliability parameters of the wind turbines in the wind farm are shown in Table 1:
[0176] Table 1 Equivalent wind turbine reliability parameters
[0177] ...
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The invention discloses a reliability evaluation method of a pumped storage system based on multiple wind power plants. The method includes the following steps: 1, based on relevant characteristics of wind speeds of two adjacent wind power plants, calculating wind speed time series of the wind speeds of the two adjacent wind power plants according to an ARMA method; 2, establishing a reliability evaluation model of the pumped storage system based on the wind power plants; 3, conducting reliability evaluation on the reliability assessment model, obtained in step 2, of the pumped storage system based on the wind power plants by using a sequential Monte Carlo method. The method has the advantages that wind speed related informationis close to that in a real situation, in the evaluation process, the influences of the installed capacity, pumping efficiency and operation strategy of pumped power stations are taken into account, the use of pumped storage system can reduce the abandoned wind amount and improve the wind energy utilizationrate, and the impacts of wind electricity fluctuation on the security of electric power security systems are reduced.
Description
technical field [0001] The invention relates to the technical field of reliability calculation methods for wind farm power generation systems, in particular to a reliability evaluation method for a pumped storage system based on multiple wind farms. Background technique [0002] Due to the emergence of the global energy crisis and the deteriorating environmental problems, countries around the world are looking for energy structure transformation, and wind power technology has developed rapidly. Due to the continuous decline in the cost of wind power generation and the increasing maturity of wind power technology, the installed capacity of wind power and the scale of wind farms are gradually expanding, and large-scale grid connection is the inevitable trend of wind power development. Due to the intermittent and fluctuating nature of wind power output, grid integration of wind power will significantly reduce the reliability and security of the power system. With the large-sca...
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Login to View More IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06Y02E40/70Y04S10/50
Inventor 谢开贵胡博王蔓莉贺海磊周勤勇
Owner CHONGQING UNIV