CT indirect secondary through-flow method for generator set

Abstract

The invention discloses a CT indirect secondary through-flow method for a generator set. The method comprises the following steps: (1), carrying out preparing for inspection work before a unit CT secondary loop through-flow test; turning on a power supply of a relay protection tester device after all early-stage work preparation is completed; adjusting the output rated current value to be 50 percent of the rated current value; recording and collecting current values of all equipment connected with the group of CT secondary circuits; checking whether the error between the secondary current display value and the measured value of each piece of equipment and the 50% of the rated current added by the relay protection tester is within an allowable range or not; adjusting the relay protection tester to enable the output value of the relay protection tester to reach a rated value, recording and collecting all equipment current values of the group of CT secondary circuits, judging whether an error between the measured CT secondary rated current value and the added CT secondary rated current value is within an allowable range or not, and ending the CT secondary through-flow experiment. Therefore, the time and labor are saved; meanwhile, the situation that a tester is exposed in a complex field environment for a long time is avoided, and work safety is improved.

Description

technical field [0001] The invention relates to the technical field of power debugging and power testing, in particular to a method for indirect secondary flow through CT of a generator set. Background technique [0002] my country is still in the high-speed stage of economic development. Although various industries are currently facing transformation, electricity, as an efficient, flexible and unique secondary energy, still has a large demand in my country, and the construction of various power plants is still non-stop. For power plants, the measurement and collection of various power data of the unit are realized through CT and PT. For CT, in daily production, many accidents are often caused by various problems in the CT secondary wiring, especially when the CT secondary circuit is open, it will often cause extremely serious accidents, ranging from Destruction of equipment will seriously threaten the personal safety of power plant staff. Therefore, in the commissioning s...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for the indirect secondary current flow of generator set CT. Obtain a convenient electrical and electronic room, only need a set of short wiring at the CT terminal box, and through different connection methods can complete the flow of all electrical equipment corresponding to the secondary circuit of the CT current, which saves time and manpower , At the same time, it avoids the long-term exposure of the test personnel to the complicated field environment, and improves the work safety

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