Monitoring device of power generator real time power angle

A technology of generator and rotor position, applied in motor generator testing, measuring device, phase angle between voltage and current, etc., can solve the problem that the accuracy is not as good as the direct method, etc. high precision effect

Inactive Publication Date: 2008-05-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the existing PMU device can also be used for generator measurement, it calculates the internal potential phase and power angle of the generator through the indirect method, which is affected by factors such as the generator model and transient process, and the accuracy is not as good as the direct method.

Method used

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  • Monitoring device of power generator real time power angle
  • Monitoring device of power generator real time power angle
  • Monitoring device of power generator real time power angle

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Experimental program
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Effect test

Embodiment

[0022] figure 1 A working principle block diagram of the present invention is given. The generator real-time power angle monitoring device mainly includes a CPU module, a GPS module, a rotor pulse acquisition and photoelectric isolation circuit, a hardware clock and signal acquisition circuit, a keyboard and a display module, and a power supply module.

[0023] CPU module: connected with GPS module, rotor pulse acquisition and photoelectric isolation circuit, hardware clock and signal acquisition circuit, keyboard and display module, used to complete the acquisition of rotor position signal, form GPS time scale, perform data communication, complete angle Computing and other tasks. Such as figure 2 As shown, the CPU module includes a CPU microprocessor 1, a latch 2, a program memory 3, a data memory 4, a decoder 5, and an external communication interface 6. Among them, CPU microprocessor 1 adopts 16-bit 80C196 single-chip microcomputer, which has 256 bytes of on-chip RAM an...

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PUM

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Abstract

A detecting device of real time power angle on electric generator is prepared as receiving clock information from GPS system to have a current accurate time, simultaneously collecting pulse signal issued by photoelectric transducer on generator rotor to monitor position of generator rotor in real time to obtain generator internal potential phase and then to obtain voltage phase at generator end, finally obtaining power angle by calculating phase difference of potential phase in generator to voltage phase at generator end.

Description

technical field [0001] The invention relates to a device for directly measuring the rotor position and power angle of a generator in real time. Background technique [0002] With the development of the economy and society, the scale of the power system is expanding day by day, and more stringent requirements are put forward for the monitoring and control of the safe and stable operation of the power system. The power angle in the power system is the most direct physical quantity that reflects the stable state of the system. However, due to the lack of a high-precision synchronous clock, the power system has not been able to directly obtain the voltage phasor and power angle of each node in the system at the same time for a long time. With the United States opening its Global Positioning System, or GPS, to civilian use, electric power systems have gained a new means of time synchronization. In recent years, a GPS-based phasor measurement unit (PhaseMeasurement Unit, referred...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34G01R25/00
Inventor 张大海刘玉田
Owner SHANDONG UNIV
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