A hot standby speed regulation power supply system
A power supply system and speed regulation technology, which is applied in the direction of power network operating system integration, control system, information technology support system, etc., can solve problems such as high probability of switching failure, skipping trips, and large switching delay, so as to avoid product quality degradation , the effect of reliable power supply
Active Publication Date: 2021-02-12
BEIJING DYNAMIC POWER CO LTD
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Problems solved by technology
However, due to the large switching delay, this technology is only suitable for loads with large inertia, such as fans, and is not suitable for high-torque and constant-torque loads such as belt conveyors, hoists, and water pumps; moreover, in this technology, when the high-voltage frequency conversion fails After cutting, the tangential power frequency moment is a blind cut (blind cut refers to: no measurement of the power supply (amplitude, frequency, phase) and motor speed to be cut is performed, only delay processing is performed, and the switch is started when the delay time is up process), so the probability of switching failure is high, when the switching current reaches figure 1 When the tripping threshold of circuit breaker QF0 is broken, QF0 will be topped off, and there is even a risk of tripping over the level
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be co...
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The invention discloses a hot standby speed regulation power supply system, which comprises two frequency converters of the same model, the two frequency converters are connected in parallel, and communicate through optical fiber connection; when supplying power, each frequency converter calculates and controls itself according to the same parameter signal waveform, one inverter acts as the master inverter, and the other inverter acts as the slave inverter. The bipolar transistor signal is blocked, but the control waveform calculated by itself is corrected in real time according to the control waveform of the master inverter, so that the control waveform of the slave inverter is consistent with the master inverter; when the master inverter fails, stop and send a control signal to the slave inverter Inverter, switching from the inverter to supply power to the load. Since the control waveforms of the two frequency converters are consistent at all times, the switching process does not need to wait for a delay, and can be realized within one interruption time, with rapid response, small switching disturbance and easy control.
Description
technical field [0001] The invention relates to the technical field of frequency converter power supplies, in particular to a hot standby speed regulation power supply system. Background technique [0002] With the development of industrial technology, energy problems are becoming more and more serious. High-voltage inverter power supply, as the preferred power supply for speed regulation and energy saving of motors, is more and more widely used in enterprises, and its role is becoming more and more important. Whether some high-power motors on site can operate reliably is related to the normal production of the entire production line. For example, during the production process, if the motors that drive important loads stop abnormally, the entire production line will stop production and restart. It takes a lot of manpower and material resources; if it is serious, it will cause the entire production line to be completely scrapped, causing irreparable losses to users: such as ...
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IPC IPC(8): H02J9/06H02P27/04H02P29/028
CPCH02J9/06H02P27/04H02P29/028Y02B70/30Y04S20/20
Inventor 彭丽巧唐德军彭丽敏
Owner BEIJING DYNAMIC POWER CO LTD