Three-phase high-voltage circuit breaker integrated measurement method based on double-end grounding
A high-voltage circuit breaker and measurement method technology, which is applied in the field of electric equipment, can solve problems such as laborious work, danger, and time-consuming, and achieve the effects of large economic value, reduced labor intensity, and reduced operating danger
Inactive Publication Date: 2021-07-20
HANGZHOU XIHU ELECTRONICS INST
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Therefore, the implementation of these projects is not only time-consuming and labor-intensive, but also has certain operational risks.
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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only for understanding the present invention, and do not limit it in any way.
[0032] The three-phase high-voltage circuit breaker Q is connected in series with the three-phase high-voltage bus C, and is used to control the on-off of the three-phase high-voltage bus. Both ends of each phase of the three-phase high-voltage circuit breaker Q are grounded through the grounding switch J1 and J2 respectively. In the working state, the high-voltage circuit breaker Q is in the closed state, and the grounding knife switch J1 and J2 are in the open state, such as figure 1 Shown (one phase is taken as an example in the figure for illustration).
[0033] Such as figure 2 As shown, the three phases of the three-phase high-voltage circuit breaker Q are respectively connected in series to the three-phases C(X), C(Y) and...
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The invention discloses a three-phase high-voltage circuit breaker integrated measurement method based on double-end grounding. The existing method has many measurement process links, wastes time and labor and is unsafe. The measuring method comprises the following steps that firstly, the three-phase high-voltage circuit breaker is opened, all grounding knife switches are closed, and three-phase buses at two ends of the three-phase high-voltage circuit breaker are unfastened; then six ports of the three-phase high-voltage circuit breaker are respectively connected with a mechanical characteristic measuring module and a loop resistance measuring module in the detection device through comprehensive test lines; the mechanical characteristic measurement module obtains opening time or closing time by measuring resistance changes of two ends of each phase of the three-phase high-voltage circuit breaker; in the opening state of the three-phase high-voltage circuit breaker, the loop resistance measurement module measures the grounding loop resistance, measures the total resistance in the closing state, and calculates the loop resistance of each phase of the three-phase high-voltage circuit breaker. According to the method, a test wire does not need to be disconnected in the measurement process, and only one-time wiring is needed, so that the measurement time is shortened, the measurement efficiency is improved, and the operation risk is reduced.
Description
technical field [0001] The invention belongs to the technical field of power equipment, in particular to the technical field of power equipment measurement, in particular to an integrated measurement method for a three-phase high-voltage circuit breaker based on double-terminal grounding. Background technique [0002] In recent years, with the rapid development of the power system, the number of substations is increasing day by day, the voltage level is getting higher and higher, and the induced electricity in the substation is also increasing. As an important main equipment in a substation, high-voltage circuit breakers need regular preventive tests. Mechanical characteristic measurement and loop resistance measurement are two of the test items. The three-phase high-voltage circuit breaker is connected in series on the three-phase high-voltage bus, and is used to control the on-off of the three-phase high-voltage bus. The two ends of each phase in the three-phase high-volt...
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IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 楼狄叶新林王俊肖
Owner HANGZHOU XIHU ELECTRONICS INST