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Flexible wide area power grid phase measurement system

A wide-area power grid and phasor measurement technology, which is applied in the field of wide-area power grid phasor measurement systems, can solve problems such as prone to abnormalities and failures, and the structure of the power distribution system is huge and complex, so as to save networking costs and avoid information volume oversized effect

Inactive Publication Date: 2011-09-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Claims
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Problems solved by technology

Compared with the power transmission system, the structure of the power distribution system in the power system is larger and more complex, and it is more prone to abnormalities and failures. There is basically no application in the electrical system

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  • Flexible wide area power grid phase measurement system
  • Flexible wide area power grid phase measurement system
  • Flexible wide area power grid phase measurement system

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Embodiment Construction

[0048] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0049]The design idea of ​​the present invention is: since the power system (grid) is in a normal state most of the time, there is neither abnormality nor failure, but abnormality or failure may occur in individual places at individual times. In the daily work of the power system, faults or abnormalities of the system can be found in various ways. For example, through the data of the SCADA (Supervisory Control And Data Acquisition) system to reflect the abnormal phenomena of the system, inspectors find abnormal phenomena in the power supply equipment in the substation. The personnel found that there were frequent unexplained abnormalities or failures in the local power grid. Many of the information obtained by the abo...

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Abstract

The invention discloses a flexible wide area power grid phase measurement system in the technical field of power system monitoring. The flexible wide area power grid phase measurement system comprises a mobile phase measurement unit, a communication network and a central platform which are sequentially connected. The mobile phase measurement unit comprises a signal pickup module, a forward channel module, an analogue-to-digital conversion module, a synchronous sampling module, a data management module and a communication interface module, wherein the signal pickup module, the forward channel module, the analogue-to-digital conversion module, the data management module and the communication interface module are sequentially connected; and the synchronous sampling module is connected with the analogue-to-digital conversion module and the data management module respectively. The communication network is used for transmitting a digital signal with additional time information to the central platform. The central platform is used for receiving the digital signal with the additional time information, and storing and analyzing received data. The flexible wide area power grid phase measurement system realizes flexible networking by the mobile phase measurement unit so as to not only save the networking cost, but also solve the problems of effective information extraction difficulties caused by an overgreat information amount.

Description

technical field [0001] The invention belongs to the technical field of power system monitoring, and in particular designs a flexible wide-area power grid phasor measurement system. Background technique [0002] The wide-area power grid of the power system is a geographical concept. It consists of generators, substations and important nodes. The smallest unit is the provincial network, and the next level is the regional network (such as East China, North China, Central China), and the next level For the national interconnection grid. The wide area power grid measurement system (WAMS) is mainly composed of a synchrophasor measurement unit (PMU) at the station end, a communication system and a data acquisition center at the dispatch center. Its simplified structure diagram is shown in figure 1 shown. [0003] With the help of the precise time synchronization function of the global positioning system GPS, the information such as phase angle and voltage with time scale collecte...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 梁志瑞牛胜锁苏海锋
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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