Monitoring system and method of micro-power grid power quality

A power quality monitoring and monitoring system technology, applied in information technology support systems, electrical components, circuit devices, etc., can solve problems such as power outages, and achieve the effect of improving power supply reliability and avoiding large-scale power outages

Inactive Publication Date: 2018-06-29
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of large-scale power outages in the prior art when dealing with microgrid faults, this application provides a microgrid power quality monitoring system and method

Method used

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  • Monitoring system and method of micro-power grid power quality
  • Monitoring system and method of micro-power grid power quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 As shown in , it is a structural block diagram of a microgrid power quality monitoring system provided in the embodiment of the present application. The micro-grid power quality monitoring system includes several PT / CTs, several circuit breakers, several relay modules, a merging unit, a micro-grid measurement and control device, and a micro-grid monitoring device; each of the PT / CTs is connected to a The circuit breaker is connected and a relay module is connected; each of the relay modules is respectively connected with the merging unit and the microgrid measurement and control device, and each of the relay modules is also connected with a circuit breaker; the merging unit It is connected with the micro-grid measurement and control device; the micro-grid measurement and control device is connected with the micro-grid monitoring device.

[0030] In the microgrid power quality monitoring system, the PT / CT is used to collect the voltage / current of users in t...

Embodiment 2

[0032] see figure 1 As shown in , it is a structural block diagram of a microgrid power quality monitoring system provided in the embodiment of the present application. The micro-grid power quality monitoring system includes several PT / CTs, several circuit breakers, several relay modules, a merging unit, a micro-grid measurement and control device, and a micro-grid monitoring device; each of the PT / CTs is connected to a The circuit breaker is connected and a relay module is connected; each of the relay modules is respectively connected with the merging unit and the microgrid measurement and control device, and each of the relay modules is also connected with a circuit breaker; the merging unit It is connected with the micro-grid measurement and control device; the micro-grid measurement and control device is connected with the micro-grid monitoring device.

[0033] Optionally, each PT / CT is connected to a relay module through an optical fiber, and each PT / CT is connected to a...

Embodiment 3

[0044] On the basis of embodiment 1, see figure 2 As shown, it is a schematic flow chart of a microgrid power quality monitoring method provided by this application, and the monitoring method specifically includes the following steps:

[0045] Collect the user's incoming line voltage / current signal;

[0046] receiving the voltage / current signal and performing amplification processing;

[0047] Combining and synchronizing the amplified voltage / current signals;

[0048] Calculate power consumption and analyze power quality according to the combined and synchronously processed voltage / current signals;

[0049] Receive the power consumption and power quality information, and quickly isolate the faulty single user.

[0050] Optionally, receiving the power consumption and power quality information, and quickly isolating a single user that has failed, specifically includes:

[0051] Judging whether the power quality meets the requirements, if the power quality does not meet the ...

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Abstract

The invention discloses the technical field of micro-power grid monitoring, and particularly discloses a monitoring system and method of micro-power grid power quality. In the system, PT / CT is used for collecting voltage / current of a user in a micro-power grid, converting the voltage / current into a digital signal, and sending the digital signal to a combination unit; a relay module is used for amplifying a voltage / current signal and performing long-distance transmission; the combination unit is used for synchronizing the data sent by various PT / CT and sending the data to a micro-power grid measuring and controlling device; the micro-power grid measuring and controlling device is used for analyzing power quality and calculating power consumption and sending a result to the micro-power gridmonitoring device; the micro-power grid monitoring device is used for monitoring power quality of the user in real time, and sending a tripping instruction to the micro-power grid measuring and controlling device when a power utilization failure occurs to a user side; the micro-power grid measuring and controlling device sends the tripping instruction to the relay module, and quickly cuts off a circuit breaker corresponding to the user so as to realize quick isolation of a single user having a fault, and therefore, large-scale power failure is avoided.

Description

technical field [0001] The present application relates to the technical field of microgrid monitoring, and in particular to a microgrid power quality monitoring system and method. Background technique [0002] With the continuous development of science and technology, microgrid has become a structure of the future power system. As the third-level power grid after the transmission network and distribution network, this kind of micro-grid structure that is close to the load and can be self-regulated has higher economic and environmental benefits than the current large power grid. In the power system with a large number of distributed power generation applications in the future, the microgrid has and can exert its greatest potential. Especially in the field of intelligent power distribution, it is inseparable from the development of distributed power supply and micro-grid technology. A large number of distributed power supply and running on the medium-voltage or low-voltage di...

Claims

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Application Information

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IPC IPC(8): H02J13/00
CPCH02J13/00019Y04S40/124Y02E60/00Y04S10/52
Inventor 李浩涛杨洋张睿苏适严玉廷
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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