CN209342898U - One kind metering device scene that do not have a power failure changes the outfit electricity addscope - Google Patents

Abstract

The utility model relates to an on-the-spot electricity addition instrument for a non-stop metering device, and its technical feature is that it includes a casing and a measurement circuit; the measurement circuit includes: a voltage acquisition circuit, a current acquisition circuit, an AD measurement and a power calculation module, Isolation module, main MCU module, wireless communication module and power supply module; The output end of described voltage collection circuit and current collection circuit is connected with AD measurement and power calculation module respectively, is used for collecting the voltage signal and the voltage signal of measured electric energy meter by wiring The power value is obtained after the current signal; the AD measurement and power calculation module are connected with the isolation module to realize the isolation between the strong current and the weak current; the isolation module is connected with the main MCU module, and the main MCU module passes The wireless communication module is connected with the upper computer for real-time reading of current and voltage sampling data and then data processing. The utility model can accurately measure the power loss during the replacement process in real time.

Description

An on-site replacement power addition instrument for non-stop metering devices

technical field

The utility model belongs to the technical field of electric energy measurement, and relates to an electric quantity supplementary instrument, in particular to an on-site replacement electric quantity supplementary instrument for a non-stop power meter.

Background technique

At present, many links such as periodic rotation, fault replacement, and verification replacement in the metering work need to replace the electric energy meter without power failure. In order to ensure the uninterrupted power consumption of users and ensure the quality of power supply, it is often necessary to change meters on site. According to the requirements of the "Technical Specifications for Electric Energy Metering Devices", when replacing the electric energy meter with electricity, it is necessary to short-circuit the current paddle of the junction box first, and then disconnect the voltage paddle, so that the user can use electricity normally during the meter replacement. However, during the meter replacement period, the energy meter cannot achieve measurement, resulting in power loss. When the meter is replaced on site, the power loss is often calculated by artificial timing and the average load forecasting method. However, due to real-time changes in the user's power load and the fact that the meter replacement time cannot be accurate to the actual value, the calculation of the user's replacement power is inaccurate and easy. Cause the risk of recovery and power loss, especially in the process of high-quality service, it is easy to cause service risks such as complaints caused by user dissatisfaction.

At present, when the high-voltage user metering device is replaced without power failure, the wattmeter method and power estimation method are generally used to calculate the power loss during the replacement process. Such methods are too simple. In addition, due to large fluctuations in user load, the usual average Estimation, it is difficult to accurately estimate the replacement power. In addition, since during the replacement process, when it comes to users with large electricity loads, the replacement time should be clearly stipulated and can be accurately timed. Therefore, it is necessary to propose a battery additional meter, which can accurately measure the power loss during the replacement process in real time.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and propose a non-stop metering device with reasonable design, convenient and practical, and capable of real-time and accurate measurement of power loss during the replacement process.

The utility model solves its practical problems and realizes by taking the following technical solutions:

A non-stop metering device is equipped with an on-site electric quantity supplementary instrument, including a casing and an internal measurement circuit; the measurement circuit includes: a voltage acquisition circuit, a current acquisition circuit, AD measurement and power calculation modules, an isolation module, a main MCU module, Wireless communication module and power module; The output end of described voltage acquisition circuit and current acquisition circuit is connected with AD measurement and power calculation module respectively, is used for obtaining the power value after the voltage signal and current signal of the electric energy meter under test are collected by wiring ; The AD measurement and power calculation module are connected with the isolation module to realize the isolation between the strong current and the weak current; the isolation module is connected with the main MCU module, and the main MCU module is connected with the upper computer through the wireless communication module connection, for real-time reading of current and voltage sampling data and then data processing; the power supply module includes an external power supply module and a lithium battery power supply module, and the external power supply module and the lithium battery power supply module are respectively connected to the AD through a power supply voltage conversion module The measurement and power calculation module, the isolation module and the main MCU module are connected and supplied with power.

Moreover, the input end of the main MCU module is also connected to the GPS module for realizing GPS time synchronization and geographic positioning functions.

Moreover, the input end of the main MCU module is also connected with the high-stable crystal oscillator module, which is used for monitoring the time of electric energy accumulation during device replacement.

Moreover, the main MCU module is also connected with the meter calibration interface module, and is used for receiving the electric energy pulse of the electric energy meter under test, and checking and checking the electric energy meter.

Moreover, the main MCU module is also connected with the meter reading interface module for reading the data of the multifunctional electric energy meter and its event data.

Advantage and beneficial effect of the utility model:

1. The utility model aims at the problem of power loss during live meter replacement, and proposes a power addition meter that can be measured during live power meter replacement. When the electric energy meter is replaced with electricity, the accurate measurement of the lost electricity and the recovery of the electricity fee ensure the accurate measurement of the electricity electricity fee and the particles are returned to the warehouse.

2. Through the transformation of the electric energy meter calibrator, the utility model completes data sampling with the help of the voltage and current sampling equipment of the electric energy meter calibrator. The operation is simple, no need to carry additional instruments, and the power value during the replacement period can be obtained quickly and accurately. , so as to effectively reduce and avoid customer dissatisfaction and other disputes that may be caused when the replacement power is charged. At the same time, through the geographical positioning of the additional instrument and the recording of the equipment by the host computer, it can ensure that traces of on-site construction power recovery are left. Keep evidence to prevent economic and security risks from artificial calculations.

3. The power adding meter of the utility model is modified on the basis of the electric energy meter calibrator, and the data is transmitted to the tablet computer through the built-in wireless communication, and the data sampling is completed by means of the voltage and current sampling equipment of the power adding meter, and the operation is simple, that is, The mobile operation terminal does not need to carry additional equipment, and can quickly and accurately obtain the power value during the replacement.

Description of drawings

Fig. 1 is a circuit block diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail:

A kind of non-stop metering device on-the-spot replacement electricity additional instrument, as shown in Figure 1, includes a housing and its internal measurement circuit; the measurement circuit includes: voltage acquisition circuit, current acquisition circuit, AD measurement and power calculation module, isolation Module, main MCU module, wireless communication module and power supply module; The output end of described voltage acquisition circuit and current acquisition circuit is connected with AD measurement and power calculation module respectively, is used for collecting the voltage signal and the electric current of measured electric energy meter by wiring The power value is obtained after the signal; the AD measurement and power calculation module are connected with the isolation module to realize the isolation between the strong current and the weak current; the isolation module is connected with the main MCU module, and the main MCU module is wirelessly The communication module is connected with the host computer for real-time reading of current and voltage sampling data and then data processing; the power module includes an external power supply module and a lithium battery power supply module, and the external power supply module and the lithium battery power supply module are powered by The voltage conversion module is respectively connected with the AD measurement and power calculation module, the isolation module and the main MCU module and supplies power to them.

In this embodiment, the input end of the main MCU module is also connected to the GPS module for realizing GPS time synchronization and geographic positioning functions.

In this embodiment, the input end of the main MCU module is also connected to the high stability crystal oscillator module, which is used for monitoring the time of electric energy accumulation during the device replacement.

In this embodiment, the main MCU module is also connected with the meter calibration interface module, and is used for receiving the electric energy pulse of the electric energy meter under test, and performing verification and inspection on the electric energy meter.

In this embodiment, the main MCU module is also connected to the meter reading interface module for realizing the reading of the data of the multi-function electric energy meter and its event data.

In this embodiment, the utility model can add a single-phase electric energy meter, a three-phase three-wire electric energy meter, and a three-phase four-wire electric energy meter to carry out continuous electricity charge additional measurement during the replacement process, and the specific method is as follows:

(1) Measuring single-phase electric energy meter

Ua terminal is connected to live wire, Uo terminal is connected to neutral wire, Ia current clamp is connected to live wire, pay attention to the polarity;

(2) Measurement of three-phase three-wire electric energy meter

Ua, Uc terminals are connected to A-phase and C-phase voltages, and Uo terminal is connected to B-phase voltage;

Ia and Ic current clamps are connected to A and C current loops according to polarity

(3) Measuring three-phase four-wire electric energy meter

Ia, Ib and Ic current clamps are connected to A, B and C current loops according to polarity

Ua, Ub and Uc terminals are connected to A phase, B phase and C phase voltage, and Uo terminal is connected to neutral line voltage;

Each module of the utility model is described in detail below respectively:

(1) Voltage acquisition circuit: realize the measurement of the voltage signal through wiring;

(2) Current acquisition circuit: realize the measurement of the current signal through wiring;

(3) AD measurement and power calculation module: realize the measurement of electrical parameters such as voltage, current, and phase, and the calculation of power values, and perform basic calculations for electric energy accumulation;

(4) Isolation module: realize the isolation between strong current and weak current, ensure sufficient insulation strength and withstand voltage value, and ensure the safety of operators;

(5) Main MCU module: the core of the measurement equipment, realizing data calculation and data interaction;

(6) GPS module: It can complete the GPS time synchronization function and effectively ensure the correctness of electric energy measurement;

(7) High stability crystal oscillator module: effectively guarantee the accuracy of the time when the electric energy is accumulated during the device replacement;

(8) Calibration interface module: used to receive the electric energy pulse of the meter under test, and realize the verification and inspection function of the electric energy meter;

(9) Meter reading interface module: realize the reading of multi-function electric energy meter data and its event data;

(10) Wireless communication module: adopt WIFI communication mode to realize the communication between the test equipment and the tablet computer, and realize the data interaction of the man-machine interface;

(11) Power supply voltage conversion module: it converts a single power supply mode into the voltage power supply required by the equipment;

(12) External power supply/lithium battery power supply: the core power of the test equipment, supporting the effective operation of the test equipment.

(13) Host computer (tablet computer): R&D control software reads sampling data in real time and analyzes and calculates. It adopts Android 6.0 or above operating system, simple and convenient UI operation interface, and can be learned and used quickly.

It should be emphasized that the embodiments of the utility model are illustrative rather than restrictive, so the utility model includes and is not limited to the embodiments described in the specific implementation, and those skilled in the art according to the utility model Other implementations derived from the technical solution also belong to the protection scope of the present utility model.

Claims (5)

1. A kind of electricity addscope 1. metering device scene that do not have a power failure changes the outfit, it is characterised in that: the measurement including shell and its inside Circuit；The measuring circuit includes: voltage collection circuit, current collection circuit, AD measurement and power computation module, isolation mode Block, main MCU module, wireless communication module and power module；The output end of the voltage collection circuit and current collection circuit point It is not connected with AD measurement and power computation module, for acquiring the voltage signal and electric current letter of tested electric energy meter by wiring Performance number is obtained after number；The AD measurement and power computation module are connected with isolation module, for realizing forceful electric power and light current Between isolation；The isolation module is connected with main MCU module, which passes through wireless communication module and host computer It is connected, carries out data processing after the sampled data for reading electric current and voltage in real time；The power module includes external supplies Electric module and lithium battery power supply module, the external power supply module and lithium battery power supply module pass through supply voltage conversion module point It is not connected with AD measurement and power computation module, isolation module and main MCU module and powers for it.
2. 2. one kind according to claim 1 does not have a power failure, metering device scene changes the outfit electricity addscope, it is characterised in that: described The input terminal of main MCU module is also connected with GPS module, for realizing GPS clock synchronization and geographic positioning functionality.
3. 3. one kind according to claim 1 does not have a power failure, metering device scene changes the outfit electricity addscope, it is characterised in that: described The input terminal of main MCU module is also connected with high stability crystal oscillator module, the electric energy accumulative time during changing the outfit for monitoring device.
4. 4. one kind according to claim 1 does not have a power failure, metering device scene changes the outfit electricity addscope, it is characterised in that: described Main MCU module is also connected with calibration interface module, for receiving tested electrical energy meter electricity energy impulse, carries out verification inspection to electric energy meter It looks into.
5. 5. one kind according to claim 1 does not have a power failure, metering device scene changes the outfit electricity addscope, it is characterised in that: described Main MCU module is also connected with meter reading interface module, for realizing the copy reading to multifunctional electric energy meter data and its event data.