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New-energy connected-grid power control method based on prediction and adjustment performance and safety constraint

A technology of safety constraints and power control, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems that cannot truly reflect the transient state and dynamic safety and stability characteristics of the power grid, and achieve the effect of improving the safety and stability margin of the power grid and improving real-time performance

Active Publication Date: 2014-04-30
NANJING NARI GROUP CORP +2
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Problems solved by technology

[0008] The present invention divides the new energy power station into a plurality of power station groups with similar control performance cost ratio indicators according to the control performance cost ratio index of the grid-connected power control of the new energy power station at the current moment to the change of the safety and stability margin of the power grid, thereby solving the problem of accessing the power transmission channel Different groups of new energy power stations cannot truly reflect the current transient state and dynamic security and stability characteristics of the power grid

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  • New-energy connected-grid power control method based on prediction and adjustment performance and safety constraint
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  • New-energy connected-grid power control method based on prediction and adjustment performance and safety constraint

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[0045] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0046] figure 1 Step 1 describes that if the control center needs to control the grid-connected active power of the new energy power station according to the requirements of safe and stable operation of the power grid at this time, then enter step 2); otherwise, end this method.

[0047] figure 1 Step 2 in the above describes the calculation of the grid-connected active power prediction accuracy and grid-connected active power regulation performance index of the new energy power station participating in the grid-connected active power control at the current moment by the following method, and then enter step 3);

[0048] First of all, the grid-connected active power prediction values ​​of each new energy power station in each grid-connected active power assessment period before the current moment are connected by a straight line to obtain each new...

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Abstract

The invention discloses a new-energy connected-grid power control method based on prediction and adjustment performance and safety constraint and belongs to the technical field of electric-power system scheduling operation and control. According to control performance-price-ratio indexes of power-gird safety stability margin changes by new-energy-power-station connected-grid power control at a current moment, the new-energy connected-grid power control method divides new-energy power stations into a plurality of power-station groups which are approximate in control performance-price-ratio index so that a problem that grouping of the new-energy power stations according to the difference of connection power transmission channels can not reflect truly current transient and dynamic safety stability characteristics of a power grid is solved. The new-energy connected-grid power control method based on the prediction and adjustment performance and the safety constraint is capable of improving instantaneity, reliability and precision of new-energy power-station connected-grid active-power limitation and instantaneity, reliability and precision of new-energy power-station connected-grid active-power improvement and activeness of new-energy power-station connected-grid active-power prediction and control technology equipped level improvement.

Description

technical field [0001] The invention belongs to the technical field of power system scheduling operation and control. More precisely, the invention relates to a method for real-time control of grid-connected power of new energy sources considering the constraints of safe and stable operation of the power grid. Background technique [0002] The power generation characteristics of new energy power plants such as wind power and photovoltaic power plants are volatile, random and intermittent. In order to fully absorb the power of new energy power plants under the premise of ensuring the safety and stability of the power grid, the power grid control center not only needs to master the grid connection of new energy power plants Power prediction information, and it is necessary to be able to control the grid-connected power of new energy power plants in real time. GB / T19963-2011 "Technical Regulations for Wind Farm Connected to Power System" promulgated by the National Standardizat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
Inventor 徐泰山汪宁渤马明马彦宏刘强周强段慧路亮王昊昊
Owner NANJING NARI GROUP CORP
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