High-proportion distributed photovoltaic grid-connected absorption capability analysis method

A distributed photovoltaic and absorptive capacity technology, applied in the field of distribution network, can solve problems such as inaccurate calculation methods, and achieve the effects of increasing population diversity, increasing mutation probability, and increasing network loss

Pending Publication Date: 2021-06-18
HEBEI UNIV OF TECH +2
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Problems solved by technology

This method adds the chaotic disturbance formula to the chaotic genetic algorithm, increases the diversity of the new generation of individuals according to the artificial degradation factor and the chaotic disturbance factor, and adds the immigration operator to increase the diversity of the population, effectively solving the problem of falling into the local optimal solution;

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  • High-proportion distributed photovoltaic grid-connected absorption capability analysis method
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  • High-proportion distributed photovoltaic grid-connected absorption capability analysis method

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Embodiment 1

[0158] by image 3 The shown ieee33 node power distribution system is an embodiment of the present invention. Among them, node 1 is the power point of the distribution network system, set as a balanced node, the voltage value is 1.04, the node voltage range is 0.95-1.05 (pu), the allowable value of voltage fluctuation is 3%, and the current limit of the line is 250A, the upper limit of the photovoltaic capacity of each node is 1MW, and the maximum short-circuit current value is selected according to the specified value in the "Technical Guidelines for Typical Design of 10k V Power Distribution Engineering" formulated by the State Grid Corporation of China: the maximum three-phase short-circuit current cannot exceed 20kA. Assume that all nodes in the test system can access photovoltaic power.

[0159] First, 300 sets of photovoltaic active power output arrays are formed through chaotic initialization, and then the generated photovoltaic active power output arrays are selected,...

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Abstract

The invention relates to a high-proportion distributed photovoltaic grid-connected absorption capability analysis method. According to the method, a chaos disturbance formula is added to a chaos genetic algorithm, the diversity of a new generation of individuals is increased through an artificial degradation factor and a chaos disturbance factor, an immigrant operator is added, the population diversity is increased, and the problem of falling into a local optimal solution is effectively solved; and then the improved chaos genetic algorithm is applied to the new field of distributed photovoltaic consumption of the power distribution network. According to the method, the problem that the maximum capacity of the distributed photovoltaic power supply allowed to be accessed by the power distribution network cannot be accurately and quickly calculated by an existing calculation method can be solved.

Description

technical field [0001] The invention relates to the technical field of power distribution network, in particular to a method for analyzing high-proportion distributed photovoltaic grid-connected accommodation capacity. Background technique [0002] Nowadays, fossil energy is decreasing day by day, the global environment is deteriorating day by day, and photovoltaic power generation has been widely developed and utilized. However, the output of distributed photovoltaic power supply is intermittent and fluctuating, which may affect the power quality of distribution network. Therefore, in order to reduce the impact, it is necessary to evaluate the distributed photovoltaic capacity of the distribution network in advance. [0003] With the development of science and technology, people have higher and higher requirements for the calculation of the distribution network's distributed photovoltaic consumption capacity. In the patent application publication number CN 111799838 A for d...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46H02J3/06G06N3/12G06N7/08
CPCG06N3/126G06N7/08H02J3/06H02J3/381H02J3/466H02J2203/10H02J2203/20H02J2300/24H02J2300/40Y02E10/56Y04S10/50
Inventor 李练兵张凯宁范辉梁纪峰李佳祺李东颖周文李铁成罗蓬冯慧波
Owner HEBEI UNIV OF TECH
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