Voltage transformer integrated measuring device
A technology for voltage transformers and measuring devices, which is applied in the directions of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of electric energy measurement system errors, inability to guarantee fair energy transactions, fair social problems, economic losses, and the influence of error characteristics.
Pending Publication Date: 2017-12-22
SUZHOU HUADIAN ELECTRIC CO LTD
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Problems solved by technology
[0003] However, since most of the power voltage transformers operating in the power network are power transformers based on the principle of capacitive voltage division, the external electric and magnetic fields generated by adjacent phase power transformers in normal operation have a certain impact on their error characteristics.
Therefore, some errors are introduced into the electric energy metering system, which cannot guarantee the fairness and justice of electric energy transactions and may cause certain social problems and economic losses
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] Such as figure 1 As shown, the voltage transformer integrated measuring device of the present invention includes: a casing 1 , a three-phase step-up transformer 2 , a three-phase standard voltage transformer 3 , and a high-voltage bushing 4 .
[0024] The housing 1 has an inner space, the three-phase step-up transformer 2 and the three-phase standard voltage transformer 3 are integrated in the housing 1, and at the same time, in order to ensure good ele...
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The invention provides a voltage transformer integrated measuring device which comprises a shell, a three-phase step-up transformer, a three-phase standard voltage transformer and a high voltage bushing; the three-phase step-up transformer and the three-phase standard voltage transformer are integrated into the shell, and the high voltage bushing is arranged on the shell. The three-phase standard voltage transformer comprises two single-phase standard voltage transformers. The single-phase standard voltage transformer has a primary high voltage terminal and a secondary output terminal. The primary high voltage terminals of the two single-phase standard voltage transformers and the high voltage terminal of the three-phase step-up transformer are in star connection for three-phase output through the high voltage bushing, and the secondary output terminals of the two single-phase standard voltage transformers are in star connection with the secondary output terminal of the three-phase standard voltage transformer. The voltage transformer integrated measuring device simulates the state of the tested power voltage transformer during operation by three-phase synchronous boosting and compares with the three-phase standard voltage transformer so as to measure the error level of the tested voltage transformer, thereby ensuring the fairness and just of the power trade.
Description
technical field [0001] The invention relates to a measuring device, in particular to an integrated measuring device for voltage transformers. Background technique [0002] At present, when performing 220 (110) kV power voltage transformer calibration, it is necessary to increase the power frequency of the tested voltage transformer to the rated voltage to simulate the actual operating state of the voltage transformer, so as to compare with the standard device to achieve the national standard Quantity transfer works. The existing test method is to use a single-phase booster to compare the amplitude and phase of the single-phase standard voltage transformer and the tested voltage transformer so as to measure the error of the power transformer. [0003] However, since most of the power voltage transformers operating in the power network are power transformers based on the principle of capacitive voltage division, the external electric and magnetic fields generated by adjacent ...
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IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor李刚余青田耘袁峰马君
OwnerSUZHOU HUADIAN ELECTRIC CO LTD