A Method for Evaluation of Regional Distributed Photovoltaic Maximum Capacity Access
A distributed photovoltaic and evaluation method technology, applied in the field of solar power generation, can solve problems such as repeated checking and calculation
Active Publication Date: 2020-05-22
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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This method is widely used in actual engineering, but it needs to be checked repeatedly
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[0025] The present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.
[0026] In this embodiment, a method for evaluating the maximum capacity access of regional distributed photovoltaics, specifically includes:
[0027] 1. Divide the regional power grid; as shown in Table 1, it is a proposal table for the new installed capacity of distributed power generation and the evaluation scope of the regional power grid.
[0028] Table 1 Suggested table of new installed capacity of distributed power generation and evaluation scope of regional power grid
[0029]
[0030] 2. Evaluate the grid adaptability of the regional grid. like figure 2 Shown is the regional power grid adaptability evaluation index system. The regional power grid adaptability evaluation includes three levels, including the adaptability evaluation of each voltage level, the grid adaptability evaluation of each subregion, and the overall grid adap...
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A regional distributed photovoltaic maximum capacity access evaluation method comprises the steps of partitioning by taking a substation as a power supply range; performing three-hierarchy evaluation on adaptability of each voltage grade power grid, adaptability of each partitioned power grid and adaptability of the whole power grid, wherein an evaluation index comprises nine items as follows: transformer reliability, circuit reliability, transformer full (over) load rate, circuit full (over) load rate, a short-circuit current, voltage deviation over standard rate and harmonic distortion over standard rate; and iteratively adjusting a distributed power supply installation scale with regard to adaptability evaluation of a power supply grid to obtain two or more than two distributed power supply installation scales with adaptability score approaching 0, and determining the maximum acceptance capability evaluation method of a regional power grid by probing and an interpolation method. The regional distributed photovoltaic maximum capacity access evaluation method is applicable to estimation on the distributed photovoltaic absorption capability by a power distribution network before grid connection of a distributed photovoltaic power supply.
Description
technical field [0001] The invention relates to a method for evaluating the maximum capacity access of regional distributed photovoltaics, which belongs to the technical field of solar power generation. Background technique [0002] my country clearly pointed out that by 2020, non-fossil energy will account for about 15% of the total primary energy consumption. Therefore, it is an inevitable trend to develop a low-carbon economy and use low-carbon energy to achieve its "green rise". The development of renewable energy such as photovoltaics and wind power is a way to develop clean and low-carbon energy. With the in-depth development of distributed power in the distribution network, distributed photovoltaic power generation has also been more and more used. When photovoltaics are integrated into the distribution network, it will affect the operation and maintenance of the distribution network. The capacity of photovoltaic power generation is different, and the power quality,...
Claims
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IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 李琼范瑞祥王华云郑蜀江王文彬蒙天骐
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST