High-precision timing method and device, and photovoltaic power grid inverter control method and device

A timing device, high-precision technology, applied in photovoltaic power grid inverter control method and device, high-precision timing method, timing, device field, can solve the problem of affecting timing accuracy, long timing time, and MCU timer timing cycle being broken Break and other problems, to achieve the effect of long-term high-precision timing

Active Publication Date: 2022-07-22
JIANGSU RCT POWER ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing timing method is usually carried out by the timer in the control unit (Microcontroller Unit, MCU), but in the main control MCU timing process, because the foreground system can trigger external interrupt and abnormal, cause the MCU timer timing cycle to be interrupted, and Each interruption may cause the actual timing time to be too long, which affects the timing accuracy

Method used

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  • High-precision timing method and device, and photovoltaic power grid inverter control method and device
  • High-precision timing method and device, and photovoltaic power grid inverter control method and device
  • High-precision timing method and device, and photovoltaic power grid inverter control method and device

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[0047] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary, and should not be construed as any limitation to the protection scope of the present invention.

[0048] After the existing master MCU timer is configured with the counting mode, the value of this register will automatically increase by 1 every time a machine cycle passes. When the count value is accumulated to the period value in the set period register, an interrupt request can be generated at the same time. At this time, the counter is cleared, and a fixed-cycle timing interrupt is realized by this method. There are many interrupts in embedded systems, and there are also nested interrupts, such as figure 1 shown.

[0049] At the same time, in the front and back systems, each stage of a control flow is processed by ...

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Abstract

The invention provides a high-precision timing method and device and a photovoltaic power grid inverter control method and device.According to the high-precision timing method, a timing period is divided into a decimal part and an integer part, a control unit measures the decimal part with millisecond as the precision, and a real-time clock measures the integer part with second as the precision; therefore, long-time high-precision timing is realized.

Description

technical field [0001] The invention relates to timing technology in the field of industrial control, and in particular to a high-precision timing method and device, and a photovoltaic grid inverter control method and device. Background technique [0002] Nowadays, more and more industrial control fields require time-accurate calculation of fault information. When the operating conditions of the machine deviate from the normal value, within a certain time range, the machine should keep running normally, but if the threshold time is exceeded, the machine must stop immediately. This process requires the machine to accurately time the deviated operating conditions. [0003] The existing timing method is usually executed by the timer in the control unit (Microcontroller Unit, MCU), but during the timing process of the master control MCU, because the foreground system will trigger external interrupts and exceptions, the MCU timer timing cycle is interrupted, and Each interruptio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04F10/00H02J3/38
CPCG04F10/00H02J3/381H02J2300/24Y02E10/56
Inventor 王瑞生李白龙王福梅朱乔
Owner JIANGSU RCT POWER ENERGY TECH CO LTD
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