A stochastic dynamic programming method for multi-energy storage flexible suppression of wind power
A stochastic dynamic programming, multi-energy storage technology, applied in wind power generation, circuit devices, AC network circuits, etc., can solve the problem of inability to resist wind power uncertainty and fluctuations on the power grid, and achieve flexible suppression of wind power randomness. Overall benefit, the effect of increasing the lifespan of energy storage
Active Publication Date: 2018-09-25
NANJING UNIV OF POSTS & TELECOMM
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[0003] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology and provide a stochastic dynamic programming method for multi-energy storage flexible suppression of wind power. According to the probability distribution of energy storage daily scheduling and considering the maximum allowable charging capacity ratio and the minimum discharge capacity ratio Restricting the random dynamic planning of energy storage charging and discharging, the purpose of flexibly suppressing the randomness of wind power is achieved with a small charging and discharging cost, and it solves the problem that the scheduling plan based on experience cannot resist the impact of wind power uncertainty and volatility on the power grid. technical problem
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[0025] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0026]figure 1 It is a multi-stage multi-stage decision-making recursive process diagram. According to the energy storage charge and discharge constraints and the energy storage charge and discharge ramp rate constraints, the energy storage at time t is charged and discharged with a probability relationship. The energy storage at time t and The amount of charge and discharge determines the energy storage capacity at time t+1.
[0027] figure 2 It is a flow chart of the stochastic dynamic programming method, which illustrates the flow of the stochastic dynamic programming method under the multi-energy storage optimization model.
[0028] (1) Construction of multi-energy storage optimization model
[0029] (1) Objective function:
[0030]
[0031] Among them, F is the cost of charging and discharging energy storage, p t is the probability dist...
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The present invention discloses a multi-energy storage stochastic and dynamic planning method for flexibly suppressing the randomness of wind power and belongs to the power system automation technical field. According to the method of the invention, a multi-energy storage model with minimizing energy storage charging and discharging costs adopted as an objective function is constructed according to energy storage parameters; an energy storage charging upper proportion coefficient and an energy storage discharging lower proportion coefficient are additionally adopted on the basis of the upper and lower limit of original energy storage capacity; and a stochastic and dynamic planning method is utilized to optimize the multi-energy storage model on the basis of a known daily scheduling probability. With the multi-energy storage stochastic and dynamic planning method for flexibly suppressing the randomness of the wind power of the invention adopted, energy storage charging and discharging costs can be minimized under a condition that constraint conditions are satisfied, and the randomness of the wind power can be suppressed flexibly, and an energy storage life can be prolonged.
Description
technical field [0001] The invention discloses a random dynamic programming method for multi-energy storage flexible suppression of wind power, which belongs to the technical field of electric power system automation. Background technique [0002] At present, energy saving, emission reduction and curbing global warming have become a common challenge and an important issue facing the whole world. Since most of my country's power industry uses coal to generate electricity, the problem of energy conservation and emission reduction is particularly prominent in my country's power industry. With the enhancement of people's awareness of environmental protection, the development of wind energy can achieve sustainable energy development and reduce the proportion of non-renewable energy such as coal power generation in my country's total power generation. With the development of micro-grid technology, wind power and other renewable energy-based power generation technologies have beco...
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IPC IPC(8): H02J3/28G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/28H02J2203/20Y02E10/76Y02E40/70Y04S10/50
Inventor 岳东单延逍张慧峰
Owner NANJING UNIV OF POSTS & TELECOMM