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Large-scale distribution type power generation-based power grid dispatching method

A technology of distributed power generation and power grid dispatching, applied in the direction of single-network parallel feeding arrangement, sustainable manufacturing/processing, climate sustainability, etc., can solve problems such as low reliability, waste of resources, adverse effects of local power grid operation, etc. Achieve the effects of reducing operational risks, enhancing power generation capacity, and diversifying energy types

Inactive Publication Date: 2013-04-17
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the characteristics of small capacity and strong intermittence of distributed energy sources, their participation in the market alone will bring many problems: on the one hand, independent distributed energy sources often have to bear high fines because they cannot guarantee reliable power generation; on the other hand, due to Its reliability is low, and its large-scale development may have adverse effects on the operation of local power grids, such as causing overload of related lines or fluctuations in bus voltage, deterioration of power quality, etc., and the system cannot withdraw from the original large-scale units in order to ensure stable operation of the power grid , resulting in a waste of resources
The access of multiple distributed power sources and energy storage devices in distributed power sources has completely changed the fault characteristics of the power distribution system, changed the original topology structure and power flow direction of the distribution network, and changed the change of electrical quantities after a fault. It is very complicated, and the traditional protection principle and fault detection method will be greatly affected, which may lead to the inability to accurately determine the location of the fault.

Method used

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  • Large-scale distribution type power generation-based power grid dispatching method
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Embodiment 1

[0016] figure 1 It is a system schematic diagram of a grid dispatching method based on large-scale distributed power generation provided by the present invention. like figure 1 As shown, this embodiment implements a grid dispatching method based on large-scale distributed power generation, which uses virtual power plants to integrate distributed energy, and the system operates according to the upper and lower limits of output provided by virtual power plants combined with the power generation of conventional power plants Under the premise of ensuring the reliable and stable operation of the power grid, rationally arrange the output of virtual power plants and conventional units at each time period. figure 1 The VPP management system in the system is the virtual power plant in the embodiment of the present invention. The system is networked with conventional power plants and can include conventional units such as hotspot cogeneration and small hydropower; distributed photovolt...

Embodiment 2

[0018] figure 2 It is a system structure diagram of the integration of distributed energy by the virtual power plant provided by the present invention. like figure 2 As shown, this embodiment realizes the integration of distributed energy resources by the virtual power plant. Before the virtual power plant participates in the energy market, it combines the upper and lower limits of internal distributed power output, the interruptible load at each time period, and the data of distributed energy storage charging and discharging, and reports and dispatches the upper and lower limits of its output at each time period according to its internal load forecast data; After accepting the system scheduling requirements, the scheduling requirements are met by arranging the start-stop output of local distributed generation in the grid, the amount of interruptible load interruption, and the charging and discharging of energy storage batteries.

[0019] The embodiment of the present inve...

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Abstract

The invention discloses a large-scale distribution type power generation-based power grid dispatching method. The method comprises the following steps of: integrating distribution type energy sources by a virtual power plant; and reasonably arranging the power of each time interval of the virtual power plant and a normal machine set by a system according to the upper limit and the lower limit or the power offered by the virtual power plant in combination with the power generation running parameters of a normal power plant on the premise that the reliable and stable running of the power grid is guaranteed. The virtual power plant can reasonably arrange the local distribution type power generating power and can interrupt the load interruption and the charging and discharging of an energy storage battery in combination with the characteristic of the local distribution type energy sources according to the dispatching requirement, so that the power requirement of the system to the virtual power plant can be met. According to the method, the distribution type energy sources is uniformly managed by the virtual power plant, and the energy sources is diversified in variety by integrating various distribution type energy sources, so that the running risk can be reduced, and the power generation capability can be enhanced; therefore, the method can participate in the power grid dispatching.

Description

technical field [0001] The invention relates to the field of power system grid dispatching, in particular to a grid dispatching method based on large-scale distributed power generation. Background technique [0002] The national "Twelfth Five-Year Plan" outline clearly proposes to promote the promotion and application of distributed energy systems. The National Energy Administration emphasized that it will steadily promote distributed power generation demonstration projects, and distributed energy construction will be an important development direction for future smart grid construction. In recent years, distributed energy power plants have developed rapidly at home and abroad with their unique advantages. In the "12th Five-Year" power grid plan of Shenzhen Power Supply Bureau, it is also proposed to actively promote the construction of distributed energy power plants. [0003] Due to the characteristics of small capacity and strong intermittence of distributed energy sourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCY02P80/14
Inventor 祝宇翔黄媚李扬郑晓辉
Owner SHENZHEN POWER SUPPLY BUREAU