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A prediction method for power grid peak regulation operation considering UHV DC connection

A UHV DC and operating mode technology, applied in forecasting, AC network circuits, electrical components, etc., can solve problems such as difficult adaptation and scientific evaluation, and achieve the effect of improving huge pressure

Active Publication Date: 2019-04-30
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the traditional evaluation method, UHV operates with constant active power, which will bring huge pressure to the peak regulation of the power system
In addition, it is difficult to meet the needs of complex peak-shaving operation modes, and it is impossible to make a comprehensive and scientific evaluation of the peak-shaving capacity of the power grid by only using the reserve load or peak-shaving surplus as a single evaluation index to evaluate the peak-shaving scheme

Method used

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  • A prediction method for power grid peak regulation operation considering UHV DC connection
  • A prediction method for power grid peak regulation operation considering UHV DC connection
  • A prediction method for power grid peak regulation operation considering UHV DC connection

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Embodiment

[0106] The present invention takes the Jiuquan-Hunan UHV DC project as an example to specifically analyze the peak shaving situation of the Jiuhu UHV DC connected to the Hunan power grid. The minimum power transmission capacity of Jiuhu UHV is 1000MW and the maximum is 4000MW. Combined with the load demand of Hunan Power Grid and the power transmission capacity of Jiuhu UHVDC, the operation scheme of Jiuhu UHVDC is divided into two cases: participating in peak regulation and not participating in peak regulation.

[0107] When Jiuhu DC does not participate in peak regulation, two operation modes are set. Method 1: Jiuhu DC transmits electric energy according to the minimum capacity, that is, 1000MW. Method 2: Jiuhu DC transmits electric energy according to the maximum capacity, that is, 4000MW.

[0108] When Jiuhu DC participates in peak regulation, three operation modes are set. Method 3: Jiuhu DC transmits electric energy at 1000MW from 0:00 to 8:00, and at 4000MW from 8:0...

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Abstract

The invention discloses a peak shaving running forecast method considering ultrahigh direct current access for a power grid. Aiming at the problem of peak shaving probably brought by an ultrahigh direct current accessed to the power grid, two indexes of peak shaving margin and abandoned power quantity are introduced, a set of multi-target segmented estimation method is proposed for peak shaving conditions in different months according to an ultrahigh direct current running mode, a mathematical model taking maximum peak shaving margin and minimum abandoned power quantity as targets is constructed, the model respectively utilizes the indexes to estimate the influence of ultrahigh direct current access on peak shaving balance of the power grid according to a low-load peak shaving surplus condition, and the peak shaving running forecast method considering the ultrahigh direct current access for the power grid is proposed. By the peak shaving running forecast method, reliable power supply of the power grid after ultrahigh direct current access can be guaranteed, meanwhile, the economic benefit is improved, and the peak shaving running forecast method has very important significance to running considering ultrahigh direct current access of the power grid.

Description

Technical field: [0001] The invention discloses a power grid peak-shaving operation prediction method considering UHV direct current access, and belongs to the field of power grid dispatching considering UHV direct current access. Background technique: [0002] With the connection of UHV DC to the power grid, the operation of the power grid will become more complex, and the problem of peak regulation will be further aggravated. It is urgent to study the impact of UHV DC connection on the peak regulation of the power grid and the countermeasures. At present, in the grid peak regulation evaluation method for UHV DC access, UHV DC is generally processed according to the operation mode of constant active power, and the peak regulation capacity of the power grid is evaluated with the reserve capacity or peak regulation surplus as indicators. Evaluate the peak-shaving capacity of the power grid with reserve capacity, that is, first find out the reserve capacity that the power grid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/00H02J2203/20Y02E40/70Y04S10/50
Inventor 陈道君陈跃辉张斌左剑张可人呙虎张磊李晨坤
Owner STATE GRID CORP OF CHINA
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