Initial phase angle determining method and system
An initial phase and determination method technology, applied to the phase angle between voltage and current, measuring devices, instruments, etc., to achieve the effect of solving the accuracy of space charge measurement
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Embodiment 1
[0041] figure 1 This is a flowchart of a method for determining an initial phase angle provided in an embodiment of this application.
[0042] Such as figure 1 As shown, the method for determining the initial phase angle provided by this embodiment is used to determine the initial phase angle for space charge measurement of insulating materials under AC voltage, and is applied to a measurement system for space charge measurement of insulating materials under AC voltage. Including the following steps:
[0043] S101: Apply power frequency AC voltage to the insulating material.
[0044] Apply a power-frequency AC voltage of a preset voltage level to the insulating material to be tested. The preset voltage level matches the insulation level of the insulating material, that is, the working voltage of the corresponding insulating material. In addition, the power-frequency AC voltage is 50 Hz. Frequency alternating current.
[0045] S102: Load a pulse signal on the insulating material.
[00...
Embodiment 2
[0060] image 3 It is a flowchart of a method for determining an initial phase angle provided in an embodiment of this application.
[0061] Such as image 3 As shown, the initial phase angle determination system provided in this embodiment is used to determine the initial phase angle for space charge measurement of insulating materials under AC voltage, and is applied to a measurement system for space charge measurement of insulating materials under AC voltage. It includes a first signal generating device 10, a second signal generating device 20, an acoustic signal detecting device 30, a signal sampling device 40, and a signal processing device 50.
[0062] The first signal generating device 10 is used to apply a power frequency AC voltage of a preset voltage level to the insulating material to be tested, and the preset voltage level matches the insulation level of the insulating material, that is, the working voltage of the corresponding insulating material. Frequency AC voltage ...
Embodiment 3
[0074] Figure 5 This is a structural block diagram of an initial phase angle determination system provided by another embodiment of this application.
[0075] Such as Figure 5 As shown, the initial phase angle determination system provided by this embodiment has two basic components, one is a high-voltage pulse generator (pulse frequency 2kHz) that allows space charge detection under an AC voltage of up to 100Hz, and the other is a maximum sampling frequency of 2GS / s High-performance Eclipse digital signal processor, which can store fast alternating signals.
[0076] The small AC signal is generated by a signal generator, and then amplified by a high-voltage power amplifier 2000 times. This amplified high-voltage AC voltage acts on the PEA measurement unit. At the same time, a series of high-voltage pulse signals triggered externally by Eclipse also act on the PEA measurement unit, which causes the insulation system in the PEA measurement unit to generate an acoustic signal of t...
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