A speed measuring device and a speed measuring method for a static frequency converter of a pumped storage unit
A technology of pumped storage units and static frequency converters, which is applied to measuring devices, instruments, linear/angular velocity measurements, etc., can solve problems such as dragging failures, and achieve good protection, economical and practical protection, and stable signals
Active Publication Date: 2018-10-30
NANJING NARI GROUP CORP +1
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Problems solved by technology
[0005] The main purpose of the present invention is to overcome the deficiencies in the prior art, and provide a speed measuring device and a speed measuring method for a static frequency converter of a pumped storage unit. The technical problem to be solved is that the photoelectric coding To solve the problem of dragging failure caused by signal jitter of the device, realize safe, reliable, stable signal, good protection, economical and practical pumped storage unit dragging operation
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[0035] Below in conjunction with accompanying drawing of description, the present invention will be further described.
[0036] Such as figure 1 The speed measuring device of a static frequency converter of a pumped storage unit is shown, including a controller, a photoelectric encoder and a toothed disk probe respectively connected to the controller; the photoelectric encoder is connected to the large shaft of the pumped storage unit through a coupling connected, the large shaft of the pumped energy storage unit is provided with a large shaft toothed plate, and the toothed plate probe is aligned with the large shaft toothed plate for detection and installation; the photoelectric encoder and the toothed plate probe are used to detect the rotation of the pumped energy storage unit The encoder pulse signal and the probe pulse signal are respectively collected and transmitted to the controller; the controller is used to judge the frequency of the received encoder pulse signal and...
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The invention discloses a speed measurement device for a pump storage group static frequency converter and a speed measurement method thereof. The speed measurement device comprises a controller, and a photoelectric encoder and a fluted disc probe which are respectively connected with the controller. The photoelectric encoder is connected with the main shaft of a pump storage group through a coupler. The fluted disc probe is aligned with a main shaft fluted disc which is installed on the main shaft of the pump storage group. The photoelectric encoder and the fluted disc probe are used for detecting rotating speed of the pump storage group so as to acquire encoder pulse signals and probe pulse signals and transmit the encoder pulse signals and the probe pulse signals to the controller. The controller performs frequency judgment on the received encoder pulse signals and the probe pulse signals and obtains the judgment result to act as group rotating speed output pulse signals to be transmitted to the speed feedback control end of the static frequency converter of the pump storage group. The problem of failure of dragging caused by signal jittering of the photoelectric encoder under the condition of high-rotating-speed dragging of the group can be solved so that safe and reliable and economic and practical dragging work of the pump storage group with stable signals and great protection can be realized.
Description
technical field [0001] The invention relates to a speed measuring device and a speed measuring method, in particular to a speed measuring device and a speed measuring method of a static frequency converter of a pumped storage unit, and belongs to the technical field of automatic control of a pumped storage unit. Background technique [0002] At present, pumped storage power stations generally use static frequency converter SFC to drive large-capacity pumped storage units. SFC devices are used as automatic control equipment to detect both the position of the rotor and the speed of the unit. For the pumping condition of the pumped storage unit, it can be divided into two processes: low speed detection and high speed detection. [0003] In order to realize the speed measurement at low speed, some SFC devices use incremental photoelectric encoders for measurement. However, the photoelectric encoder is connected to the large shaft of the pumped storage unit through a coupling. O...
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IPC IPC(8): G01P3/481G01P3/486
CPCG01P3/481G01P3/486
Inventor 梅高鑫蔡卫江何林波荣红施海东陈登山
Owner NANJING NARI GROUP CORP