System and method for monitoring operation state of magnetic valve type controllable reactor and excitation unit of magnetic valve type controllable reactor

A condition monitoring system and unit operation technology, applied in signal transmission systems, instruments, measuring electricity and other directions, can solve the problems of weak current temperature signal interference, eddy current loss heating, data drift and other problems, to overcome the insulation level and long-distance transmission, guarantee Reliability and stability, achieve the level of maintenance and the effect of

Pending Publication Date: 2018-11-20
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the importance of the trigger signal to the reliable and stable operation of the system, the online acquisition of the thyristor gate trigger signal may reduce the operational reliability of the system, which is not conducive to the safe and stable operation of the system.
[0004] In order to realize the temperature measurement of the magnetic valve, as far as the existing temperature measurement technology is concerned, whether it is commonly used RTD thermal resistance (Pt100), thermocouple (high resistance wire) and other electrical temperature measurement sensors, or pressure thermometers, infrared temperature measurement and other temperature measurement technologies, first of all, they are unable to completely solve the safety hazards caused by the insulation of high-voltage equipment caused by metal wires, metal parts, shielding measures, installation of pressure temperature bulbs or infrared probes in high-voltage areas, and metal wires and metal parts. There will also be serious eddy current loss and heating problems in the environment; in addition, the weak current temperature signal will be seriously disturbed in the strong magnetic field environment, making it difficult to provide real-time, stable and reliable temperature information
The fiber grating temperature sensor, which is commonly used in temperature measurement applications of transformers and dry-type air-core reactors, has the characteristics of passive, strong anti-electromagnetic interference, and can be used in harsh environments, but is limited by its own technical principles. It is often necessary to solve the comprehensive interaction of environmental factors such as pressure, stress, temperature, vibration, and bending, and often requires more complex packaging technology, which is not conducive to the measurement of a single temperature physical quantity in a complex space environment.
As mentioned above, MCR changes the saturation of the magnetic valve by adjusting the magnitude of the DC excitation current, and then realizes the continuous adjustment of the reactive capacity; and the "excitation current detection circuit for magnetically controlled reactor" disclosed in Chinese patent 201420738387.6 In this method, the DC excitation current and magnetic valve saturation information are obtained by pre-embedding the DC shunt resistor inside the magnetron reactor; however, under the internal environment characteristics of high voltage, strong magnetic field interference and strong corrosion, The received electrical signal may be seriously interfered, and then problems such as data drift, high failure rate and data misreporting may occur, and the reliability and stability of the measurement information cannot be guaranteed

Method used

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  • System and method for monitoring operation state of magnetic valve type controllable reactor and excitation unit of magnetic valve type controllable reactor
  • System and method for monitoring operation state of magnetic valve type controllable reactor and excitation unit of magnetic valve type controllable reactor
  • System and method for monitoring operation state of magnetic valve type controllable reactor and excitation unit of magnetic valve type controllable reactor

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Embodiment 1

[0037] This embodiment provides a magnetic valve type controllable reactor and its excitation unit operating state monitoring system, such as Figure 1-2 As shown, it includes a fluorescent temperature optical fiber sensor, a high-voltage excitation unit box, a low-voltage information collection box, and an integrated monitoring system for MCR operation status. and a temperature measurement signal connector 3, one end of the temperature-resistant optical fiber 2 is connected to the temperature measurement probe 1, and the other end is connected to the temperature measurement signal connector 3, and the surface of the temperature-resistant optical fiber is wrapped with polytetrafluoroethylene. The high-voltage excitation unit box is provided with an excitation unit, an AC-DC active CT transformer, an AC-DC mixed signal processor and a first Zigbee wireless transmission processor; The buffer is composed of and connected to the reactor winding tap terminals.

[0038] The low-vol...

Embodiment 2

[0046] This embodiment provides a monitoring method utilizing the monitoring system described in Embodiment 1, the steps of which are as follows:

[0047] When measuring temperature, the optical fiber temperature measurement decoding module generates an excitation signal and transmits it to the phosphor at the temperature measurement point through the temperature-resistant optical fiber; after receiving the excitation, the phosphor radiates fluorescence energy, which is transmitted back to the optical fiber temperature measurement decoding through the temperature-resistant optical fiber module;

[0048] Different ambient temperatures have different fluorescence lifetimes. The optical fiber temperature measurement decoding module obtains the temperature information at the current temperature measurement point by measuring the life span of the fluorescent signal transmitted back in the reverse direction; the optical fiber temperature measurement decoding module outputs the magnet...

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Abstract

The invention discloses a system and method for monitoring an operation state of a magnetic valve type controllable reactor and an excitation unit of the magnetic valve type controllable reactor. According to the monitoring system, the excitation unit current information measured by an AC/DC active CT transformer is transmitted to an AC/DC mixed signal processor, and the excitation unit current information processed by the AC/DC hybrid signal processor is wirelessly transmitted to a second Zigbee wireless transmission processor through a first Zigbee wireless transmission processor; the magnetic valve temperature information corresponding to a temperature measurement point is decoded by an optical fiber temperature measurement decoding module and then transmitted to an optical fiber temperature measurement signal demodulation processor; the excitation unit current information processed by the second Zigbee wireless transmission processor and the magnetic valve temperature information processed by the optical fiber temperature measurement signal demodulation processor are transmitted to a protocol conversion communication unit, and the signal is then transmitted by the protocol conversion communication unit to an integrated MCR operation state monitoring system. The system is advantaged in that problems of internal high voltage of a core of a magnetron reactor, strong magnetic field interference and reliability of signal transmission of a high voltage excitation unit are solved.

Description

technical field [0001] The invention belongs to the field of power system power transmission and transformation equipment, and relates to the monitoring and analysis of the operation performance and health status of power system power transmission and transformation equipment, specifically a magnetic valve type controllable reactor and its excitation unit operation state monitoring system and method. Background technique [0002] With the advancement of technology, more and more dynamic reactive power compensation devices based on magnetic control reactors are applied to the power grid, providing more flexible and effective voltage and reactive power adjustment capabilities for the power grid. However, in the actual application of such new flexible power transmission equipment that combines traditional grid equipment and power electronic control technology, special fault detection and online monitoring devices and other fault prevention methods have not been maturely develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R19/00G01K11/32G08C17/02
CPCG08C17/02G01K11/3213G01R19/0092G01R31/00
Inventor 童力杨成钢刘浩军姚晖邵先军赵建文张建平郑宏陈超
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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