Electric energy meter at substation gateway with the function of monitoring secondary circuit faults
A technology for secondary circuit faults and electric energy meters, which is applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve the problems of cumbersome work flow, large workload, and complexity, and achieves lightening workload, reducing losses, and improving reliability. sexual effect
Active Publication Date: 2021-02-23
XINZHOU POWER SUPPLY COMPANY STATE GRID SHANXI ELECTRIC POWER
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Problems solved by technology
[0003] The present invention solves the technical problem that the current on-site detection of the electric energy meter at the gate is carried out one by one, the workload is large, the work process is cumbersome and complicated; and the on-site work must be operated under the condition of electrification, which has a certain safety risk, and provides a monitoring system. Substation Gateway Electric Energy Meter with Secondary Circuit Fault Function
Method used
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Embodiment Construction
[0014] 1. System hardware design: system block diagram such as figure 1 As shown, it is mainly composed of voltage and current sampling circuit, electric energy metering circuit, single-chip control circuit, display module, and remote communication module. The microcontroller STC89C52 controls the normal operation of the entire energy metering circuit, monitors the working status of the chip ADE7755, reads the active, reactive, apparent power, current and voltage values from the chip ADE7755 register, outputs it to the LCD display circuit, and saves the data to the memory. In order to prevent the loss of data in the event of a power failure, and to deal with data communication with remote computers.
[0015] 2. Current sampling circuit: such as figure 2 As shown in the figure, a 500µΩ manganese copper sheet is used as a current sampler, and the current signal is converted into a voltage signal through a sampling resistor and sent to the current input end of the energy mete...
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The present invention designs a substation gateway watt-hour meter with the function of monitoring secondary circuit faults, which can monitor the faults of the secondary voltage transformer and current transformer circuit of the gateway watt-hour meter in real time and send an error report to the remote, so that each department can immediately Understand the faults of electric energy meters, reduce losses, and reduce the workload of maintenance personnel. It includes a voltage sampling circuit, a current sampling circuit, an electric energy metering device, a single-chip microcomputer, a display module and / or a remote communication module; the output end of the voltage sampling circuit is connected to the input end of the electric energy metering device, and the output end of the current sampling circuit is connected to the The input end of the electric energy metering device is connected; the output end of the electric energy metering device is connected with the signal input end of the single-chip microcomputer; the signal output end of the single-chip microcomputer is connected with the display module and / or the remote communication module; the output end of the current sampling circuit is also connected with the single-chip microcomputer connected to the signal input terminal.
Description
technical field [0001] The invention designs a substation gateway electric energy meter with the function of monitoring the fault of the secondary circuit, which can monitor the faults of the secondary voltage transformer and current transformer circuit of the gateway electric energy meter in real time and transmit the error to the remote, so that each department can immediately Understand the failure of electric energy meters, reduce losses, and reduce the workload of maintenance personnel. Background technique [0002] The gateway electric energy meter is an important basis for trade settlement between power generation companies and power grid companies, between power grid companies, and between power grid companies and users. It is a national compulsory verification measuring instrument. The gateway electric energy meters installed at important gateway metering points such as power generation, cross-regional power transmission, cross-provincial power transmission, and lar...
Claims
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IPC IPC(8): G01R22/10G01R22/06
CPCG01R22/068G01R22/10
Inventor 亢建明邢洲白睿张喆
Owner XINZHOU POWER SUPPLY COMPANY STATE GRID SHANXI ELECTRIC POWER