Combined real-time peak regulation method for AC/DC hybrid grid

An AC-DC hybrid and DC transmission system technology, which is applied in the direction of AC-DC network circuit layout, electrical components, circuit devices, etc., can solve the problem that the power grid peak regulation method cannot meet the full use of AC-DC hybrid large power grid regulation resources, etc. Scope optimization and regulation of power generation resources and the effect of improving the acceptance level

Active Publication Date: 2016-02-17
NANJING NARI GROUP CORP +3
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Problems solved by technology

[0002] The power generation characteristics of wind power, photovoltaic and other new energy power stations have the characteristics of volatility, randomness and intermittency. With the gradual increase of wind power, photovoltaic and other new energy grid-connected scales, the existing grid peak regulation methods cannot meet the full utilization of AC and DC. The regulation resources of mixed large power grid to improve the service capability of new energy grid connection

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  • Combined real-time peak regulation method for AC/DC hybrid grid
  • Combined real-time peak regulation method for AC/DC hybrid grid
  • Combined real-time peak regulation method for AC/DC hybrid grid

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Embodiment Construction

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0019] figure 1 Step 1 in the description is that if the current moment is the evaluation time of the power grid joint peak regulation, go to step 2), otherwise, the calculation of the power grid joint peak regulation is not performed, and the method ends.

[0020] figure 1 Step 2 in the above describes that according to the set parameters, a certain time between the current assessment time of the grid joint peak shaving and the assessment time immediately after the current assessment time is taken as the reference time for the calculation of the grid joint peak shaving, that is, through the formula ( 1) To determine the base time for grid joint peak shaving calculation:

[0021] t c =t 0 +a(t 1 -t 0 )(1)

[0022] Among them, t 0 is the current moment, t 1 is the evaluation time of power grid joint peak shaving immediately after the curren...

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Abstract

The invention discloses an alternating current and direct current hybrid power grid joint real time peak shaving method which belongs to the technical field of power system operation and control. According to the invention, the constraints of a contact line plan of a non safe and reliable constraint and a direct current system power transmission plan are relieved; alternating current and direct current hybrid power grids are used as a whole body; an objective function which comprehensively considers the comprehensive evaluation index, the power limit, the interruptible load limit, the AGC unit economy and environmental friendliness, and the power loss of a new energy power station is established; by using AGC unit active regulation rate, direct current system power, power grid steady frequency, active reserve and the online power transmission capacity of a safe and reliable power transmission channel as the constraints, and by considering bus load prediction, new energy power station power prediction and a non AGC unit power generation plan, optimization calculation is carried out on the new energy power station power, an active AGC unit, the direct current system power and interruptible load control; the comprehensive power transmission capacity of alternating current and direct current hybrid power grids is fully used; and the acceptance level of new energy power generation is improved.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control. More precisely, the invention relates to a combined real-time peak-shaving control method for an AC-DC hybrid power grid that is suitable for considering the constraints of safe, reliable and economical operation. Background technique [0002] The power generation characteristics of wind power, photovoltaic and other new energy power stations have the characteristics of volatility, randomness and intermittency. With the gradual increase of wind power, photovoltaic and other new energy grid-connected scales, the existing grid peak regulation methods cannot meet the full utilization of AC and DC. The regulation and control resources of the mixed large power grid are required to improve the service capability of new energy grid connection. The main manifestations are: according to the set connection line plan and the DC system transmission plan, the hierarchical and zonal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J4/00
Inventor 徐泰山常青许涛汪宁渤刘强马明段慧王昊昊
Owner NANJING NARI GROUP CORP
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