CN202285151U - Double-path working power supply of integrative experimental device with electricity-theft prevention for simulating working condition of metering of electric energy - Google Patents

Abstract

The utility model discloses a double-path working power supply of an integrative experimental device with electricity-theft prevention for simulating the working condition of the metering of electric energy, which comprises computer and system software, an RS232/485 communication interface, a precise power supply, an isolating transformer of the power supply, a wiring controller of the power supply, an electricity-theft/fault simulating switcher, an overcurrent and electricity-leakage protector, an electric energy meter, an internal impedance element, a load box, an external interference signal source, an external longitudinal redundancy checking (LRC) load box and an external voltage regulating and current boosting device; and the double-path working power supply of the integrative experimental device with electricity-theft prevention for simulating the working condition of the metering of the electric energy is convenient for the operations of teaching and training electricity-theft prevention, drilling actual operating skills, tracking, analyzing and researching an electricity-theft behavior and the like.

Description

Anti-stealing comprehensive experimental device simulates the dual-circuit working power supply of electric energy metering conditions

Technical field:

The utility model relates to an anti-stealing comprehensive experimental device for simulating a dual-circuit working power supply of electric energy metering conditions, which can be used for technical personnel of power supply enterprises to study, experiment and research anti-stealing technology.

Background technique:

In recent years, the methods of electricity stealing by users have been constantly refurbished, and the electricity stealing technology has become more and more intelligent. The phenomenon of electricity theft has been repeatedly banned, and has become one of the important factors for the loss of benefits of power supply enterprises.

Since electric energy cannot be stored and is consumed at the same time as it is stolen, electricity theft cannot be proved by the stolen electric energy, but can only be identified by behavior. However, on-site evidence of electricity theft (such as: electrical theft equipment, etc.), traces, etc. that can be used to prove electricity theft are easily destroyed. This requires power inspection personnel of power supply companies to be well aware of various electricity theft techniques and methods in advance. Otherwise, for users with concealed means of stealing electricity and high technical content, the on-site anti-stealing electricity inspection work will easily delay fighters and fall into a passive situation.

Electricity inspection personnel of power supply enterprises lack an anti-stealing experimental platform to study and research the performance of various types of billing electric energy meters and other metering devices running online and related anti-stealing functions (or defects in anti-stealing functions); Electricity theft or electric energy meter failure and the analysis and research of the electric energy meter that has been rotated are not enough, resulting in the lack of anti-stealing technology or screening of suspected elements of electric theft; Mechatronic electronic electric energy meter) and other means of stealing electricity, electricity inspectors also lack the technical platform to read the "trace data" stored inside the electric energy meter that can prove that the user has committed electricity theft.

Some domestic manufacturers of teaching and training equipment produce low-voltage metering anti-stealing training devices with single functions, which simply simulate the user’s method of stealing electricity by changing the wiring and physical parameters of the circuit for the metering circuit of the mechanical electric energy meter. The experimental power supply conditions of the device cannot meet the requirements. Access to the experimental requirements of the distributed electric energy meters under different metering methods. The function of the device is simple, and it can no longer meet the actual application needs of power supply enterprises such as anti-stealing experiments and actual measurements.

Invention content:

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a dual-channel working power supply for the anti-stealing comprehensive experimental device to simulate the working condition of electric energy measurement, which is convenient for anti-stealing teaching and training, practical skill drills, and tracking of electric-stealing behaviors. Analytical research etc.

The utility model solves the technical problem and adopts the following technical solutions:

The anti-stealing comprehensive experimental device simulates the dual-circuit working power supply of the electric energy metering working condition, including:

Computer and system software, RS232/485 communication interface, precision power supply, power isolation transformer, power wiring controller, stealing/fault simulation switcher, overcurrent and leakage protector, electric energy meter, built-in impedance element and load box, external Interference signal source, external LRC load box, external voltage regulator booster;

The computer is connected to two RS232/485 communication interfaces, and the two RS232/485 communication interfaces are respectively connected to a power wiring controller and a precision power supply;

Mains power and precision power supply are respectively connected to the power wiring controller and connected to the power stealing/fault simulation switch in two ways after passing through the overcurrent and leakage protectors, and the power wiring controller and the overcurrent 1. There is a power isolation transformer on the mains line between the leakage protectors;

The power stealing/fault simulation switcher is divided into three circuits and connected to three-phase four-wire electric energy meters, single-phase electric energy meters, and three-phase three-wire electric energy meters respectively, and impedance elements and load boxes are arranged in front of each electric energy meter.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

The utility model anti-stealing comprehensive experimental device simulates the dual-circuit working power supply of the electric energy metering working condition, adopts two sets of power supply technical schemes of mains power and precision power supply, and switches to Mains power supply experiment method. The mains access unit can select voltage gear output to meet the requirements of experiments and actual measurements of the connected electric energy meter access devices under various measurement methods; the precision power access unit, under the control of the computer, Adjustable constant voltage and constant current configuration output inductive and capacitive load current, which can realize voltage phase sequence setting, voltage disconnection setting, current interchange setting, current reverse connection setting, current disconnection setting, phase angle and frequency setting, Power supply output working condition phasor diagram display, etc., reproduce the on-site electric energy measurement working conditions, to meet the needs of simulating various high-tech stealing techniques experiments, and to conduct preliminary detection and running experiments on the measurement errors of electric energy meters under various working conditions . The use of dual-circuit power supply has comprehensively broadened the types of simulated power-stealing methods of the anti-stealing comprehensive experimental device and the application range of experimental measurements, and met the needs of anti-stealing technical investigation work to the greatest extent.

Description of drawings:

Figure 1 is a schematic diagram of the dual-way working power supply access system of the utility model anti-stealing comprehensive experimental device.

Numbers in the figure: 1 computer, 2 RS232/485 communication interface, 3 mains power supply, 4 precision power supply, 5 power supply wiring controller, 6 power supply isolation transformer, 7 overcurrent and leakage protector.

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

Detailed ways:

Embodiment: As shown in Figure 1, the schematic diagram of the dual-way working power supply access system of the anti-stealing comprehensive experiment device includes: computer 1, RS232/485 communication interface 2, mains power supply 3, precision power supply 4, power wiring controller 5, Power isolation transformer 6, overcurrent, leakage protector 7, etc.

The basic working process of the device power supply is: the three-phase four-wire mains power supply is introduced into the device, and the device's computer, precision power supply, power wiring controller, power stealing/fault simulation switcher and other equipment are respectively supplied with power through the device's main power switch. The operation instruction is sent through the computer 1 shown, and connected to the precision power supply and the power wiring controller through two RS232/485 communication interfaces. The shown power connection controller 5 accepts instructions to select the experimental working condition of mains power or precision power supply connection. For example: when an external interference signal source is connected to the power stealing experiment, in order to prevent damage to the precision power supply, the mains power supply is selected, and then the power supply wiring controller controls the power supply isolation transformer to realize the experimental working condition of optional voltage gear output; if the precision power supply is selected Power supply, precision power supply 4 Accept PC software control configuration output inductive or capacitive load current and other conditions of various electric energy measurement experiments. If you choose mains power, according to the rated working voltage of the electric energy meter connected to the experimental device, select three-phase four-wire (including single-phase electric energy meter) or three-phase three-wire connection mode to output 3×220/380V or 3×57.7/100V to work Voltage. If you choose a precision power supply, configure various power metering experimental conditions under the conditions of outputting inductive or capacitive load current according to the experimental requirements. The precision power control unit shown can realize voltage phase sequence setting, voltage disconnection setting, current interchange setting, current reverse connection setting, current disconnection setting, voltage gear output setting, current gear output setting, phase angle and frequency setting , power supply output working condition phasor diagram display, etc., to meet the needs of simulating various high-tech stealing techniques and experiments.

Claims (1)

1. the two-way working power of the comprehensive experimental device of opposing electricity-stealing simulation electric energy metrical operating mode is characterized in that comprising:

Computing machine, RS232/485 communication interface, precision voltage source, power isolation transformer, power supply wiring controller, stealing/fault simulation switch, overcurrent and earth leakage protective device, electric energy meter, built-in impedor and load box, external interference signal source, external LRC load box, external pressure regulation current lifting device;

Said computing machine connects two-way RS232/485 communication interface, and said two-way RS232/485 communication interface connects power supply wiring controller and precision voltage source respectively;

Civil power and precision voltage source insert said power supply wiring controller respectively and behind said overcurrent, earth leakage protective device, divide two-way to connect said stealing/fault simulation switch, and the line between said power supply wiring controller and said overcurrent, the earth leakage protective device is provided with power isolation transformer;

Said stealing/fault simulation switch divides three the tunnel to connect three-phase and four-line electric energy meter, single-phase electric energy meter, three-phase three-wire electric energy meter respectively, is provided with impedor, load box before each said electric energy meter.

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