PLC distributed IO-based smart watt-hour electric energy meter verification system
A smart energy meter, distributed technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve problems such as low work efficiency, heavy workload, waste, etc., to improve service quality, save costs, and improve user satisfaction Effect
Pending Publication Date: 2018-04-24
CHAOYANG POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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Problems solved by technology
[0003] Currently, the verification of smart electric energy meters is generally carried out by personnel on site, and the electric energy test instrument is used to test and verify it. The work efficiency is low and the waste is serious.
For a local power supply company, the total number of customer meters generally exceeds one million, so the daily operation and maintenance workload is very heavy. It is difficult to achieve good working results if the traditional working method is used
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[0035] PLC distributed IO is widely used in distributed control systems, and it is relatively easy to realize multi-user distributed data collection and centralized monitoring. Configure 8-12 IO modules, and each IO module can collect up to 8 voltage or current signals. In this way, one ET200 can collect 32-48 users’ energy meter data, and at the same time, ET200 can also be extended by adding Collect more energy meter data of users.
[0036] Siemens ET200 is mainly based on DP communication, therefore, in the present invention, DP communication and electric energy meter interactive measurement data are selected, but most of the remote transmission electric energy meters are RS485 mode or wireless mode, therefore, in the system of the present invention, Added 485-MODBUS to DP gateway or protocol converter.
[0037] In fact, ET200 can also be configured with a 485-MODBUS serial communication module 6ES7138-4DF01-0AB0 that supports its framework, and can also implement a serial...
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The invention provides a PLC distributed IO-based smart watt-hour electric energy meter verification system. The system includes an S7400 PLC main CPU module, an ET200 distributed IO, a voltage transmitter, a current transmitter, a protocol converter, a DTU serial transparent transmission module and a tested smart electric energy meter. According to the PLC distributed IO-based smart watt-hour electric energy meter verification system, voltage and current outputted from the smart electric energy meter to a user are directly detected by using the voltage transmitter and the current transmitterarranged at the site of the user; the voltage and current values outputted from the smart electric energy meter to the user are transmitted to a remote server, so that the remote server can calculateactual electric energy outputted from the smart electric energy meter to the user; and the PLC distributed IO reads electric energy metering numbers inside the smart electric energy meter through a communication mode and transmits the electric energy metering numbers to the remote server, so that the remote server can compare the electric energy metering numbers with actual user electric energy values detected by the voltage transmitter and the current transmitter.
Description
technical field [0001] The invention relates to an intelligent electric energy meter verification device, in particular to an intelligent electric energy meter verification system based on PLC distributed IO. Background technique [0002] The smart energy meter is the terminal of the smart grid. It realizes the basic power consumption measurement and does not need to be manually performed by the meter reader. It also has power consumption information storage, two-way multiple rate measurement functions, user-side control functions, and multiple data transmissions. Mode of two-way data communication function, anti-stealing function, etc. It is like a miniature computer, realizing remote control, automation, intelligence and convenience. Users only need to go to the business hall of the power company or pay the electricity bill on the manual POS machine to continue to use electricity. At present, smart energy meters have become the mainstream equipment of electricity meterin...
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IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 刘凤珍孙斌魏兴罗宏远张玖野孙晶李双利
Owner CHAOYANG POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY