Online monitoring method for capacitor voltage transformer
A voltage transformer and capacitive technology, applied in the field of capacitive voltage transformer online monitoring, can solve the problem of power supply reliability, the health status of capacitive voltage transformer is in a control vacuum, etc., and achieve the effect of small data volume
Pending Publication Date: 2021-02-19
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Problems solved by technology
[0006] The invention provides an online monitoring method for a capacitive voltage transformer, which solves the problem of power supply reliability caused by periodic power failure tests and the problem that the health status of the capacitive voltage transformer is in a control vacuum between two test cycles
Method used
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Embodiment 1
[0041] This implementation provides an online monitoring method for capacitive voltage transformers, such as figure 1 , including the following steps:
[0042] S1: Obtain the ledger information of the capacitive voltage transformer to be evaluated;
[0043] S2: Obtain the grid topology, and construct a comparison set according to the capacitive voltage transformers in the grid topology;
[0044] S3: Obtain the voltage telemetry data of all capacitive voltage transformers in the comparison set on the day of evaluation, and form a discrete voltage random variable;
[0045] S4: Calculate the Euclidean distance between all capacitor voltage transformers in the comparison set, and use the ratio K of the Euclidean distance calculated on the current day to the Euclidean distance calculated on the previous day as the evaluation index;
[0046] S5: According to the evaluation index, judge whether the abnormal standard is met;
[0047] S6: When the abnormal standard is met, an alarm ...
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The invention provides an online monitoring method for a capacitor voltage transformer. The online monitoring method comprises the following steps: acquiring machine account information of a capacitorvoltage transformer to be evaluated; obtaining a power grid topological structure, and constructing a to-be-evaluated capacitor voltage transformer comparison set; acquiring voltage telemetry data ofall the capacitor voltage transformers in the comparison set to form discrete voltage random variables; calculating the Euclidean distance is calculated, wherein the Euclidean distance is the Euclidean distance between every two capacitor voltage transformers in the comparison set, and the ratio K of the Euclidean distance of the evaluation day to the Euclidean distance of the day before the evaluation is used as an evaluation index; judging whether an abnormal standard is met or not; and giving an alarm when an abnormal standard is met. According to the invention, any hardware equipment is not required to be added, and the online monitoring of the health state of the capacitor voltage transformer is realized by utilizing the voltage telemetering data in the energy management system underthe condition of no power failure.
Description
technical field [0001] The invention relates to the technical field of voltage transformers, and more specifically, to an on-line monitoring method of a capacitive voltage transformer. Background technique [0002] Capacitive voltage transformer is a kind of high-voltage equipment widely used in power system. Its function is to measure the magnitude of high voltage amplitude as a voltage measuring element. For a long time, the method of periodic power failure preventive test has been used to monitor and control the health status. evaluate. Capacitive voltage transformers are structurally composed of a main capacitor and a voltage dividing capacitor in series. The capacitance of the voltage dividing capacitor is generally five times that of the main capacitor. Two capacitors are connected in series. The larger the capacitance, the smaller the voltage at both ends. , so using this principle of capacitive voltage division can convert high voltage into low voltage to achieve hi...
Claims
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Login to View More IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 王俊波武利会曾庆辉刘少辉刘昊张思寒李国伟陈贤熙张殷刘崧
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID