Method for wireless transmission of reference phasors in analog or phasor measurements

Abstract

The invention relates to a method of wirelessly transmitting reference phasor in analog or phasor measurement. The method is characterized by comprsing the following steps: voltage reference phasor is acquired, the acquired voltage reference phasor is wirelessly transmitted in a wireless transmission mode, the above voltage reference phasor is received by adopting a wireless receiving mode in a measurement place, and the received voltage reference phasor is used to complele the phasor measurement work at the measurement place. The invneiton provides an analog phasor measurement method based on the wireless reference phasor transmission mode, a phasor measurement experiment can be carried out on a secondary current circuit in need of phasor measurement at any place, the problem that current phasor measurement can not be carried out when no reference voltage phasor place (such as an outdoor current transformer terminal box, a 2 / 3 connection mode bus protection screen and the like) exists can be solved, and the problem that a conventional phase meter, a volt ampere characteristic tester and other measurement mode depend on measurement place reference phasor can be solved.

Description

technical field

[0001] The invention relates to a method for wireless transmission of reference phasors in analog or phasor measurements. Background technique

[0002] The inspection of the secondary current and secondary voltage amplitude and phase of the power system is the last inspection before the relay protection is put into operation. High-voltage and above power system components and line protection are directional. In order to ensure reliable and correct action, when the protection device is put into operation, it is necessary to measure the phase between the current and voltage under load. By measuring the phase between its current and voltage, it can be judged whether the phase sequence, phase, phase difference, power flow direction, etc. of the current loop are correct, and whether it meets the conditions for operation.

[0003] However, the current phasor measurement methods such as phase meter or volt-ampere characteristic tester are limited to the situation w...

Examples

Embodiment 1

[0016] For example, the 330kV AC field of Yinchuan East Converter Station in Ningxia adopts the three-half connection method. A single voltage transformer is installed on the C phase of the busbar, and A, B, and C three-phase voltage transformers are installed on the line and the incoming line side of the main transformer. Configure the voltage transformer terminal box. The current transformer is configured according to the circuit breaker, and the current secondary circuit is respectively connected to the terminal box of the current transformer. If it is necessary to measure the secondary current phasor in the terminal box of the current transformer, the measurement work cannot be completed because there is no voltage reference phasor, which affects the debugging efficiency. If the present invention is adopted, the wireless voltage acquisition device can be attached to the terminal box of the voltage transformer or the line protection screen, and the collection and transmissi...

technical field

[0001] The invention relates to a method for wireless transmission of reference phasors in analog or phasor measurements. Background technique

[0002] The inspection of the secondary current and secondary voltage amplitude and phase of the power system is the last inspection before the relay protection is put into operation. High-voltage and above power system components and line protection are directional. In order to ensure reliable and correct action, when the protection device is put into operation, it is necessary to measure the phase between the current and voltage under load. By measuring the phase between its current and voltage, it can be judged whether the phase sequence, phase, phase difference, power flow direction, etc. of the current loop are correct, and whether it meets the conditions for operation.

[0003] However, the current phasor measurement methods such as phase meter or volt-ampere characteristic tester are limited to the situation w...

Examples

Embodiment 1

[0016] For example, the 330kV AC field of Yinchuan East Converter Station in Ningxia adopts the three-half connection method. A single voltage transformer is installed on the C phase of the busbar, and A, B, and C three-phase voltage transformers are installed on the line and the incoming line side of the main transformer. Configure the voltage transformer terminal box. The current transformer is configured according to the circuit breaker, and the current secondary circuit is respectively connected to the terminal box of the current transformer. If it is necessary to measure the secondary current phasor in the terminal box of the current transformer, the measurement work cannot be completed because there is no voltage reference phasor, which affects the debugging efficiency. If the present invention is adopted, the wireless voltage acquisition device can be attached to the terminal box of the voltage transformer or the line protection screen, and the collection and transmissi...

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