A real-time online analysis method for power grid operation protection
An analysis method and power grid operation technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of inaccurate and objective analysis of power grid operation and protection, and achieve the effect of ensuring scientific and rationality and avoiding homogeneity.
Active Publication Date: 2019-07-02
YUNNAN ELECTRIC POWER DISPATCH CONTROL CENT +1
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Problems solved by technology
[0007] The present invention aims to solve the technical problem that the existing power grid operation protection analysis is not objective and accurate, and proposes a real-time online analysis method for power grid operation protection, which can solve the above problems
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Embodiment 1
[0032] Embodiment 1, the present invention proposes a real-time online analysis method for power grid operation protection, such as figure 1 The following steps are shown:
[0033] S1. Obtain the wide-area fault recording map information online in real time from the secondary information collection main station system of the dispatching control center (that is, the central dispatch), and after merging the recording data of each branch, aligning the time scale and synchronizing the sampling rate, Form a "big wave recorder" covering all the branch information of all the primary equipment in the substation; this step obtains data from the secondary information collection master station system of the dispatch control center, instead of using the data that comes with the protection, the operation process of the power grid By analyzing and judging the actual recorded wave data in the system, it is possible to more truly and objectively evaluate the performance of power grid operatio...
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The invention provides a power grid operation protection real-time online analysis method, which comprises the steps of: (1) acquiring wide-area fault wave-recording information online in real time from a secondary information acquisition main station system of a dispatching control center; (2) re-sampling wave-recording data in transformer substations, and combining all wave-recording data of the same transformer substation; (3) calculating whether a differential current of a region in which primary equipment is positioned is out of limit or not, and thereby determining a fault element; (4) determining corresponding protection obligatory actions according to the fault element; (5) and extracting actual protective action signals synchronously. The power grid operation protection real-time online analysis method can evaluate performance of power grid operation protection more truly and objectively through the actual wave-recording data and actual protection action signals of the transformer substations, completes the derivation of protective actions online by utilizing field operation data, and is fast and more objective when comparing the derived protective actions with the actual protective actions synchronously.
Description
technical field [0001] The invention relates to a real-time online analysis method for power grid operation protection. Background technique [0002] Power system simulation is a large branch in the field of simulation, which has a long history. With the development of power system, the power supply increases, the power grid expands, and the degree of automation increases. Many calculation and control problems are becoming more and more complex. Technically, considering the reliability of power supply and the safety of equipment, it is very unlikely to conduct various tests directly in the actual power system. Physical simulation requires purchasing a large number of manufacturers' equipment to conduct research in the laboratory, which is expensive. [0003] At present, when carrying out protection behavior analysis at home and abroad, they tend to use more detailed data, more transparent processes and observable intermediate variables to derive based on the same principle o...
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IPC IPC(8): G01R31/00G01R31/08
Inventor 李本瑜石恒初张琳波翟海燕赵明廖晓春方毅游昊邬炜莉张鑫罗吉沈雨王国伟左晓铮陈剑平王慧琼邓碧青
Owner YUNNAN ELECTRIC POWER DISPATCH CONTROL CENT