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CPLD realization of frequency measure in digital relay protection equipment

Yangguang Wang, Wang Jian

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Abstract

This paper introduces CPLD realization of frequency measure in digital relay protection equipment powered by DSP.The differences of principle and precision between frequency measurement method,cycle measure method,and equivalent precision frequency measurement method are compared.CPLD design and realization in the frequency measurement system are detailed,every functional module of CPLD is given,and the VHDL language description of hardware realization of frequency measure is presented.The merit of high integration,high speed,and high reliability in frequency measurement brought by adopting CPLD chip in composition of system is illustrated.

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What this paper is about

This paper introduces CPLD realization of frequency measure in digital relay protection equipment powered by DSP.The differences of principle and precision between frequency measurement method,cycle measure method,and equivalent precision frequency measurement method are compared.CPLD design and realization in the frequency measurement system are detailed,every functional module of CPLD is given,and the VHDL language description of hardware realization of frequency measure is presented.The merit of high integration,high speed,and high reliability in frequency measurement brought by adopting CPLD chip in composition of system is illustrated.

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Available abstract

This paper introduces CPLD realization of frequency measure in digital relay protection equipment powered by DSP.The differences of principle and precision between frequency measurement method,cycle measure method,and equivalent precision frequency measurement method are compared.CPLD design and realization in the frequency measurement system are detailed,every functional module of CPLD is given,and the VHDL language description of hardware realization of frequency measure is presented.The merit of high integration,high speed,and high reliability in frequency measurement brought by adopting CPLD chip in composition of system is illustrated.

Key concepts: Complex programmable logic device, Realization (probability), VHDL, Measure (data warehouse), Computer science, Electronic engineering, Digital signal processing, Relay

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