A method for energy coordinated distribution control of a hybrid energy storage system
A hybrid energy storage system and energy coordination technology, applied in wind power generation, AC network load balancing, AC network circuits, etc., can solve the problems of few applications, no priority analysis of charge and discharge, and no consideration of priority, etc., to achieve extended operation The effects of life, reduction of charge and discharge depth, and performance improvement
Active Publication Date: 2022-02-11
CHONGQING UNIV
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Problems solved by technology
Existing research has solved the basic problem of energy allocation through the low-pass filter allocation strategy, but it does not consider the priority of energy allocation under different charge state combinations of the system, and allocate energy reasonably
At present, the research on the coordination and distribution of power and energy within the hybrid energy storage system is still in the stage of theoretical analysis, and it is rarely used in practical engineering. The existing problem is that there is no clear analysis of the priority of charging and discharging under different working conditions.
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[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0034] figure 1 It is a block diagram of the energy coordination and distribution method of the hybrid energy storage system. There are four inputs, namely, the charging and discharging state of the lithium battery energy storage unit, the state of charge, the state of charge of the supercapacitor energy storage unit, and the power command, which is the current power demand. There are two outputs, which are the charging and discharging reference power of the lithium battery energy storage unit and the supercapacitor energy storage unit. First, fuzzify the input variables, determine the membership function, convert the four inputs into language variables, and then analyze the various combinations of the four input states of charge, determine the priority of energy allocation under different states, and then use this Formulate the correspond...
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The invention relates to an energy coordination distribution control method of a hybrid energy storage system, which belongs to the field of electrician theory and new technology. The method is: four inputs, that is, the charging and discharging state of the lithium battery energy storage unit, the state of charge, the state of charge of the supercapacitor, and the power command, that is, the current power demand; two outputs, namely, the lithium battery and the supercapacitor The charge and discharge reference power of the energy storage unit; first, fuzzify the input variables, determine the membership function, convert the four inputs into language variables, and then analyze the various combinations of the state of charge of the four inputs, in different states Determine the priority of energy allocation, and then formulate corresponding fuzzy rules, use language variables to represent the required output, that is, the reference power value of charge and discharge, and finally defuzzify the output variable to obtain the actual reference power. The invention reduces the charging and discharging depth, thereby reducing the cost of life loss and improving the performance of the hybrid energy storage system.
Description
technical field [0001] The invention belongs to the field of electrotechnical theory and new technology, and relates to an energy coordination distribution control method of a hybrid energy storage system. Background technique [0002] The gradual increase in the penetration rate of renewable energy power generation in the microgrid will bring problems such as wind curtailment, solar curtailment, and power quality degradation. Connecting the hybrid energy storage system to the microgrid is an effective measure to solve this problem. Existing studies have solved the basic problem of energy allocation through the low-pass filter allocation strategy, but did not consider the priority of energy allocation under different charge state combinations of the system to allocate energy reasonably. At present, the research on the coordination and distribution of power and energy within the hybrid energy storage system is still in the stage of theoretical analysis, and it is rarely used...
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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/383H02J3/386H02J3/32H02J2203/20Y02E10/56Y02E10/76
Inventor 李春燕余长青赵溶生陈骁蔡文悦张谦
Owner CHONGQING UNIV