A data-driven online method for rapidly assessing power grid transient voltage safety
A power grid transient and data-driven technology, applied in the direction of AC network voltage adjustment, AC network with the same frequency from different sources, electrical components, etc., can solve problems such as difficult online analysis stability constraint determination, long time-consuming simulation analysis, etc., to achieve Reduce storage space and evaluate the effect of accurate results
Active Publication Date: 2021-05-07
国家电网有限公司华北分部 +2
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However, the simulation analysis takes a long time, and it is difficult to be used in online analysis, stability constraint determination of reactive power optimization problems, etc.
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[0104] The present invention proposes a data-driven online method for quickly evaluating the safety of transient voltages in a power grid, which will be further described in detail in conjunction with specific embodiments below.
[0105] The present invention proposes a data-driven method for quickly evaluating the safety of power grid transient voltage online, which includes the following steps:
[0106] (1) Set the limit value of the power grid operation state quantity, including: the limit value of the power grid control state quantity and the limit value of the power flow result state quantity; randomly generate a large number of power grid operation modes, and operate the power grid that meets the limit value of the power grid operation state quantity The method and its corresponding control state quantities of the power grid are stored in the offline database; the specific steps are as follows:
[0107] (1-1) Set the limit value of grid control state quantity:
[0108] ...
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The invention proposes a data-driven online method for quickly evaluating the safety of the transient voltage of a power grid, which belongs to the technical field of power system operation control. The method firstly sets the limit value of the power grid operation state quantity, and stores the power grid operation mode that meets the limit value of the power grid operation state quantity in the offline database; calculates the transient voltage safety index TVSI of the power grid based on the bus voltage trajectory; simulates and analyzes offline The TVSI corresponding to each power grid operation mode in the database, and supplement the results to the offline database; select the adjacent grid operation mode of the current grid operation mode from the updated offline database, and use the adjacent grid operation mode to fit the current grid operation mode. The transient voltage security index is used to obtain the transient voltage security evaluation results of the current power grid operation mode. The invention can quickly evaluate the transient voltage safety of the power grid, and can be used for on-line analysis and stability constraint determination of reactive power optimization problems.
Description
technical field [0001] The invention relates to a data-driven online method for quickly evaluating the safety of a power grid transient voltage, and belongs to the technical field of power system operation control. Background technique [0002] In recent years, my country has built and put into operation a number of large-capacity long-distance transmission lines, forming a number of typical sending-end regional power grids (hereinafter referred to as: sending-end power grids) and receiving-end regional power grids (hereinafter referred to as: receiving-end power grids). The receiving-end power grid relies on external transmission of active power, and the power generation in its area is less than the load. Because the traditional synchronous generator can be used as a reactive power source, the reactive power source capacity of the receiving end grid is relatively small, resulting in poor internal voltage stability. [0003] In the modern power grid, a large number of inter...
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IPC IPC(8): H02J3/00H02J3/06H02J3/12
CPCH02J3/00H02J3/06H02J3/12
Inventor 谭贝斯汤磊罗亚洲李柱华贾琳王雪飞赵文禄齐子杰
Owner 国家电网有限公司华北分部