Power transmission line dynamic capacity-increasing operation risk assessment method based on BP neural network
A BP neural network and transmission line technology, which is applied in the field of dynamic capacity increase operation risk assessment of transmission lines, can solve problems such as complex evaluation, and achieve the effect of simple calculation and engineering practicability
Inactive Publication Date: 2016-06-15
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +1
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[0007] The purpose of the present invention is to provide a dynamic capacity-increasing operation of transmission lines based on a BP neural network model in view of the fact that the Markov chain Monte Carlo climate model is used to evaluate the risk of dynamic capacity-increasing operation of transmission lines in the prior art. Risk assessment method, through which the operation risk of the transmission line after capacity expansion can be evaluated more easily, providing a reference for the safe operation of the transmission line
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[0034] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.
[0035] like figure 2 As shown, the method of the present invention includes five steps, which are described in detail below.
[0036] Step 1 is data collection and preprocessing, which is to sample the three-phase currents of A, B, and C of the transmission line at a constant sampling frequency, and sample the micro-meteorological data on the transmission line site to obtain meteorological data for several days. The micro-meteorological data is mainly the data that affects the thermal capacity parameters of the transmission line, that is, the wind speed, ambient temperature, and solar radiation intensity along the transmission line.
[0037] Steps 2 and 3 are to establish a BP neural network prediction model as a climate prediction model, and substitute the microclimate data obtained in step 1) into the BP neural networ...
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The invention discloses a power transmission line dynamic capacity-increasing operation risk assessment method based on a BP neural network. The power transmission line dynamic capacity-increasing operation risk assessment method belongs to the technical field of power system automation. The power transmission line dynamic capacity-increasing operation risk assessment method comprises the steps of acquiring current data of a power transmission line and microclimate data of a power transmission line site, and then establishing a meteorological data prediction model based on the BP neural network. By utilizing the meteorological data prediction model, meteorological data within the next hour can be predicted, lead wire temperature distribution within the next hour after line capacity increase can be calculated by utilizing parameters such as the predicted meteorological data and current data, and a risk index after capacity-increasing operation of a lead wire can be calculated by substituting the lead wire temperature distribution into a risk assessment formula. The power transmission line dynamic capacity-increasing operation risk assessment method can be used for assessing operation risk of the power transmission line after capacity increase more simply and conveniently, and provides reference basis for safe operation of the power transmission line.
Description
technical field [0001] The invention belongs to the technical field of power system automation, and in particular relates to a method for risk assessment of dynamic capacity-enhancing operation of power transmission lines. Background technique [0002] In order to solve the contradiction between the continuous growth of demand for transmission capacity and the difficulty of constructing new lines, the dynamic capacity expansion technology of transmission lines has developed rapidly. This type of technology generally monitors the operating environment of the overhead transmission line at any time (such as ambient temperature, humidity, wind power, and solar radiation and other parameters), and accordingly improves the current carrying capacity of the transmission line according to the monitored operating environment of the overhead transmission line. In the "Q / GDW242-2008 Technical Guidelines for Online Monitoring System of Conductor Temperature of Overhead Transmission Lines...
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Login to View More IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06N3/084G06Q50/06
Inventor 王天正罗剑波郭瑞宙李雪明陈汹陈永华宋长坡梁晖朱开阳朱石晶曲晓蕾钟亮民
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER