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Method for determining maximum photovoltaic absorptive capacity of long-distance transmission power grid

A determination method and technology of absorption capacity, applied in photovoltaic power generation, load forecasting in AC network, electrical components, etc., can solve the problem of imperfect determination method of maximum photovoltaic consumption, deviation of maximum photovoltaic consumption, and no consideration of other Types of power supply joint scheduling and other issues

Inactive Publication Date: 2017-08-01
STATE GRID XINJIANG ELECTRIC POWER CORP +1
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Problems solved by technology

[0004] At present, the method for determining the maximum consumption of photovoltaics in China is not perfect, usually only from the perspective of the safety of a single photovoltaic power station, without considering joint scheduling with other types of power sources, or simply using mathematical optimization methods, the result is usually satisfied Under special conditions or extreme conditions, there is a certain deviation in the determination of the maximum photovoltaic consumption

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  • Method for determining maximum photovoltaic absorptive capacity of long-distance transmission power grid
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  • Method for determining maximum photovoltaic absorptive capacity of long-distance transmission power grid

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] figure 2 It is the geographic wiring diagram of the southern region of the Xinjiang power grid. The southern region is a typical long-distance transmission power grid relative to the main grid of Xinjiang. It is mainly divided into Hotan, southern Xinjiang and Aksu regions.

[0034] Typical daily load curves in Hotan, southern Xinjiang, and Aksu in summer are as follows: image 3 , Figure 4 , Figure 5 shown. The parameters of conventional power supplies in southern Xinjiang are shown in the table below:

[0035]

[0036] According to the stability verification results of the N-1 system of the Southern Xinjiang Power Grid, the transmission power limits of each section in Southern Xinjiang are shown in the table below

[0037]

[0038] Hydropower and photovoltaic electricity prices are 0.54 yuan / kwh and 0.9 yuan / kwh...

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Abstract

The invention discloses a method for determining the maximum photovoltaic absorptive capacity of a long-distance transmission power grid. The method takes into account the operation constraint of a plurality of power supplies and the power constraint limitation of the main section of the power grid. A multi-power supply optimization complementary model is established. The maximum photovoltaic absorptive capacity of the region is determined by using the photovoltaic absorptive rate as the index. Compared with the existing methods, the method considers the power grid security characteristics, uses the mathematical optimization result of various power supply complementary economic dispatching, effectively determines the maximum photovoltaic installed capacity of each region from the aspect of the photovoltaic absorptive rate, and plays a certain guiding role in planning a photovoltaic power station of the region.

Description

technical field [0001] The invention relates to a method for determining the maximum photovoltaic consumption capacity of a long-distance power transmission grid, and belongs to the technical field of power supply planning in new energy power generation technology. Background technique [0002] Large-scale grid-connected photovoltaic power plants can not only provide a considerable amount of clean electricity for the public grid, but also facilitate the large-scale application of new photovoltaic power generation technologies and promote the reduction of photovoltaic power generation costs. However, in recent years, the planned installed capacity of photovoltaic power plants in some areas in Northwest China has exceeded expectations, and the power supply has far exceeded regional demand, resulting in increased pressure on power transmission, which inevitably reduces the photovoltaic consumption rate in this region, and the phenomenon of solar abandonment is serious. At the s...

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Application Information

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IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/003H02J3/383H02J3/46H02J2203/20Y02E10/56
Inventor 常喜强郭小龙李渝陈军郝红岩
Owner STATE GRID XINJIANG ELECTRIC POWER CORP
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