CN206057436U - Without phase of line volt-ampere tester - Google Patents

Abstract

This utility model discloses one kind without phase of line volt-ampere tester, including main frame and slave, the main frame and slave are equipped with voltage, current signal input mouth, the input port is connected with processor by voltage measurement circuit, current measurement line output signal, the processor is connected to display, the intercommunication of the serial radio receiving transmitting module of the output signal of processor to serial radio receiving transmitting module, the main frame and slave.This utility model can gather multiple place secondary voltages, the analog quantity of electric current without phase of line volt-ampere tester and can be converted into the analog digital conversion of digital quantity, can by secondary voltage, current digital amount is reliable and stable transmits to main frame, and can realize remote (300m) wireless telecommunications.

Description

Wireless Phase Voltammetry Tester

technical field

The utility model relates to the field of electric power measurement, in particular to a phase volt-ampere tester.

Background technique

The existing phase voltammeter can measure voltage, current and the phase between two voltages and currents, and it is a common tool for relay protection debugging. However, with the construction of smart substations, the operating environment of secondary equipment has undergone tremendous changes. The secondary signals of transformers are converted into digital signals on the spot and transmitted to the central control cabinet through the network. At the work site, the distance between the secondary signals of different transformers is relatively long (some exceed 100m), which causes great inconvenience in testing between secondary signals.

At present, the domestic digital phase voltammeters used for secondary signal measurement of substations all use a host computer with multiple inputs, which is suitable for traditional substations where the secondary signals are all together. The solution for long-distance phase measurement is either to use GPS signal synchronization, or to use a dedicated synchronization pulse line. Using GPS signal synchronization, the hardware is complicated, the cost is high, and GPS signals are required on site. It is inconvenient to use a dedicated synchronous pulse line to lay special cables. Therefore domestic still do not have a kind of convenient and quick hand-held solution to be used for this.

Utility model content

The technical problem to be solved by the utility model is to realize a wireless phase volt-ampere tester capable of multi-position linkage and cooperation for measurement.

In order to achieve the above object, the technical solution adopted by the utility model is: a wireless phase volt-ampere tester, which is characterized in that: it includes a host and a slave, and the host and the slave are equipped with voltage and current signal input ports, and the input The ports are all connected to the processor through the output signal of the voltage measurement line and the current measurement line, the processor is connected to the display, and the output signal of the processor is sent to the serial wireless transceiver module, and the serial wireless transceiver module of the host and the slave communicate with each other.

The master and the slave are provided with independent power supplies.

Both the master and the slave are provided with a signal line interface, and the signal line interface is connected to a processor.

Both the housings of the host and the slave are provided with signal communication indicator lights and power supply indicator lights.

The wireless phase volt-ampere tester of the utility model can collect the analog quantities of secondary voltage and current at multiple locations and convert them into digital quantities for analog-to-digital conversion, and can reliably and stably transmit the digital quantities of secondary voltage and current to the host computer. And can realize long-distance (300m) wireless communication.

Description of drawings

The following is a brief description of the content expressed by each piece of accompanying drawing in the specification sheet of the utility model:

Figure 1 is a block diagram of a wireless phase volt-ampere tester.

detailed description

The wireless phase volt-ampere tester includes a master and a slave. The master and slave can not only work independently to measure and calculate various electrical parameters of input voltage and current signals; they can also realize the frequency and amplitude of voltage and current between different measurement points online. Synchronous measurement and calculation of electrical parameters such as value and phase, and output these results on the display; the host and slave are each equipped with a power supply for power supply. Serial wireless communication is adopted between the master and the slave.

The host of wireless phase volt-ampere tester includes voltage measurement circuit, current measurement circuit, display, host processor and serial wireless transceiver module. The voltage and current signals are connected to the respective measurement circuit through the input port for filtering, shaping, amplification and other processing. ; The output signal of the measurement line is connected to the host processor; the host processor is connected to the display for displaying measurement information; the serial wireless transceiver module is connected to the host processor for communicating with the slave.

Wireless phase volt-ampere tester slave, including voltage measurement circuit, current measurement circuit, display, slave processor and serial wireless transceiver module, voltage and current signals are connected to the respective measurement circuit through the input port for filtering, shaping and amplification and other processing; the output signal of the measurement line is connected to the slave processor; the slave processor is connected to the display for displaying measurement information; the serial wireless transceiver module is connected to the slave processor for communicating with the host.

The working process is as follows: when measuring, the master sends the measurement start command to the slave through the serial wireless transceiver module, and starts the master-side measurement at the agreed time; when the set measurement cycle is reached, first calculate the frequency and amplitude of each channel And the phase value, and then read the measurement results of the slave machine through the wireless module, after summarizing and calculating the results of each channel of the master and slave machine, the output is displayed on the monitor.

After receiving the measurement start command through the serial wireless transceiver module, the slave immediately stops the current work and starts a new round of measurement synchronously with the master at the agreed time. When the set measurement cycle is reached, the frequency of each channel is calculated. , amplitude and phase values, stored and output to the display of the slave for display, and when the measurement result query sent by the host is received, the stored result is sent to the host through the serial wireless module.

The tester has redundant means, that is, both the host and the slave are equipped with signal line interfaces, and the signal line interfaces of the host and slave are respectively connected to their respective connection processors, and the two signal interfaces can be connected through communication lines, so that when When the serial wireless transceiver module fails, the device can still be used normally. In addition, there are signal communication indicator lights and power indicator lights on the housings of the master and slave machines, allowing users to know the working conditions of the equipment in real time.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various insubstantial improvements are carried out by adopting the method concept and technical solutions of the present invention, or without Improvements that directly apply the concept and technical solutions of the present invention to other occasions are within the protection scope of the present utility model.

Claims (4)

1. Wireless phase volt-ampere tester, it is characterized in that: comprise host machine and slave machine, described host machine and slave machine are all provided with voltage, electric current signal input port, and described input port is all through voltage measurement line, current measurement line output signal It is connected with the processor, the processor is connected to the display, and the processor outputs signals to the serial wireless transceiver module, and the serial wireless transceiver modules of the host computer and the slave machine communicate with each other. 2. The wireless phase volt-ampere tester according to claim 1, characterized in that: said master and slave are provided with independent power supplies. 3. The wireless phase volt-ampere tester according to claim 1, characterized in that: both the host and the slave are provided with signal line interfaces, and the signal line interfaces are connected to a processor. 4. The wireless phase volt-ampere tester according to claim 1, characterized in that: signal communication indicator lights and power supply indicator lights are provided on the casings of the master and slave.