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Characteristic measurement system and method for network distribution bus PT signal, and transformer substation

A technology of signal characteristics and busbars, which is applied in general control systems, control/regulation systems, and fault detection by conductor type, etc. It can solve the problem of low power grid data acquisition accuracy, inability to eliminate frequency mixing errors, and inability to solve low-frequency oscillation data in distribution networks. It can solve the problems of interference and other problems, and achieve the effect of high-precision synchronous data acquisition, low transformation cost, and improvement of measurement performance standards.

Inactive Publication Date: 2019-07-16
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

Today's PMU (power grid synchrophasor measurement unit) has accumulated a set of mature and stable application theories after years of operation and application, but the PMU standard was formulated too early, and the accuracy of grid data collection is low, so it cannot effectively eliminate the mixing error , unable to solve the interference of distribution network low-frequency oscillation and high-frequency harmonics on data processing

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  • Characteristic measurement system and method for network distribution bus PT signal, and transformer substation
  • Characteristic measurement system and method for network distribution bus PT signal, and transformer substation
  • Characteristic measurement system and method for network distribution bus PT signal, and transformer substation

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0030] see figure 1 :

[0031] Aiming at the above problems, this paper develops a measurement system for the PT signal characteristics of the distribution network bus, including:

[0032] A programmable logic device for synchronous control of multiple analog-to-digital converters;

[0033] An SRAM cache module for data interaction with the above-mentioned programmable logic device;

[0034] Multiple distribution network bus PT signal devices;

[0035] and a trigger module; where:

[0036] Each distribution network bus PT signal device performs data interaction with the I / O terminal of the programmable logic device after passing through the signal conditioning module and the analog-to-digital con...

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PUM

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Abstract

The invention relates to a characteristic measurement system and method for a network distribution bus PT signal, and a transformer substation, and belongs to the technical field of the electric system automation. The system comprises a programmable logic device capable of performing synchronous control on multiple analog-to-digital converters, a SRAM cache module, multiple network distribution network bus PT signal devices, and a trigger module; each network distribution bus PT signal performs data interaction with an I / O port of the programmable logic device after passing through a signal conditioning module and the ADCs in order; a communication port is arranged on the I / O port of the programmable logic device; and the trigger module performs data interaction with the I / O port of the programmable logic device. The synchronous collection is triggered by unifying the external synchronous trigger signals, thereby realizing the high-precision synchronous collection between multiple channel bus PT signals. The collection standard is obviously improved, and the 20 thousand-point voltage waveform sampling can be reached at each cycle of the power distribution network. And a data precision requirement for the network distribution bus running state measurement at the new period is satisfied.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to a measurement system and method for PT signal characteristics of distribution network busbars and a substation. Background technique [0002] In recent years, with the increasing complexity of urban distribution network year by year, the difficulty of safe and stable operation of low-voltage distribution network is also increasing. With the comprehensive impact of factors such as the operation of UHV substations, wind power, and grid-connected photovoltaic power stations. The power sources of the low-voltage distribution network are becoming more and more complex, and how to monitor and manage the low-voltage distribution network more effectively has become an important issue. Today's PMU (power grid synchrophasor measurement unit) has accumulated a set of mature and stable application theories after years of operation and application, but th...

Claims

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Application Information

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IPC IPC(8): G01R31/08G05B19/042
CPCG01R31/086G05B19/0428G05B2219/2612
Inventor 张黎元郄洪涛张杰康宁仝新宇张颖张志君周正肖丹丹张庆堃赵紫昆
Owner STATE GRID TIANJIN ELECTRIC POWER
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