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Method and system for evaluating new energy delivery ability with access to flexible DC grid

A flexible DC and new energy technology, applied in AC network circuits, wind power generation, electrical components, etc., can solve the problem of lack of analysis and calculation methods for the maximum delivery limit of new energy

Active Publication Date: 2019-05-03
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a lack of relevant analysis and calculation methods for the maximum transmission limit of new energy sources such as wind power, photovoltaics, pumped storage power generation, etc.
Moreover, the existing technology lacks research on the power supply capacity of wind power photovoltaic new energy and pumped storage combined operation system

Method used

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  • Method and system for evaluating new energy delivery ability with access to flexible DC grid
  • Method and system for evaluating new energy delivery ability with access to flexible DC grid
  • Method and system for evaluating new energy delivery ability with access to flexible DC grid

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Embodiment

[0170] For the wind-solar-pump combined operation system, if only the cross-section transmission power limit at one time point is calculated, it is only necessary to make the pumped storage power station generate as much power as possible (or pump as little water) as possible under various safety constraints. This cannot reflect the role of pumping and storage in the concept of time to eliminate peaks and fill valleys, nor can it fully reflect the working characteristics of pumping and storage and its requirements for storage capacity. For the two-area interconnection system, the maximum transmission power on the section between the power supply and power receiving areas should be equal to the smaller value of the maximum power supply in the power supply area and the maximum power consumption in the power receiving area. That is, formula (1):

[0171] P TTC =min(P Smax ,P Rmax ) (1)

[0172] In the formula: P Smax is the delivery limit of the power supply area, P Rmax It...

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Abstract

The invention provides a method and system for evaluating new energy delivery ability with access to a flexible DC grid. A pre-established AC / DC hybrid system is divided into a power supply region anda power receiving region. A wind power, photovoltaic and pumping joint operation optimization model is solved by using an interior point method, and the maximum power delivery amount in the power supply region is obtained, and the wind power, photovoltaic and pumping joint operation optimization model comprises a constraint condition and an objective function of the power supply region defined based on the consumption limit of the power receiving region.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to a method and system for evaluating new energy external transmission capabilities connected to a flexible DC power grid. Background technique [0002] With the adjustment of energy structure, the development scale of new energy is gradually increasing. The application of new energy is increasingly widespread around the world. By the end of 2016, China's wind power and solar grid-connected installed capacity reached 147 million kilowatts and 78 million kilowatts, respectively. However, traditional technology faces many practical problems when new energy is connected to the power system on a large scale. Therefore, the flexible DC transmission technology with fast and flexible controllability, high compactness and excellent environmental adaptability has been widely used in the integration of new energy sources. The fluctuation and intermittency of wind ...

Claims

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Application Information

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IPC IPC(8): H02J5/00H02J3/46
CPCH02J5/00H02J3/472Y02E10/76
Inventor 杨晓楠赵昆郎燕生张印刘鹏王磊罗雅迪王淼宋旭日李理李静黄金魁
Owner CHINA ELECTRIC POWER RES INST