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Detection circuit and method for detecting parameter of voltage division circuit and electric energy metering chip

A technology of electric energy measurement chip and voltage divider circuit, which is applied in the direction of using digital measurement technology for measurement, voltage divider, measurement device, etc., can solve the problem of low measurement accuracy of measurement accuracy, fault detection signal, etc.

Pending Publication Date: 2019-09-13
SHENZHEN RENERGY TECH
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Problems solved by technology

[0004] The purpose of this application is to provide a detection circuit, method and electric energy metering chip for voltage divider circuit parameters, aiming to solve the problem of the measurement accuracy and fault detection signal of the measured voltage in the scene where the existing voltage measurement circuit needs DC potential bias. The problem of low measurement accuracy

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  • Detection circuit and method for detecting parameter of voltage division circuit and electric energy metering chip
  • Detection circuit and method for detecting parameter of voltage division circuit and electric energy metering chip
  • Detection circuit and method for detecting parameter of voltage division circuit and electric energy metering chip

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Embodiment Construction

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0024] see figure 1 and figure 2 The detection circuit of the voltage divider circuit parameters provided by an embodiment of the present application includes a voltage divider circuit 20 coupled with a first signal source 10 having a first frequency, and the voltage divider circuit 20 includes a first voltage divider 21 connected in series, a second A voltage divider 22 and a third voltage divider 23, the second voltage divider 22 is connected in parallel with a voltage measurement module 30, the detection circuit also includes a second signal source 40 and a DC signal ...

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Abstract

The application belongs to the technical field of voltage detection, and provides a detection circuit for detecting a parameter of a voltage division circuit. The detection circuit comprises the voltage division circuit coupled with a first signal source with a first frequency; the voltage division circuit comprises a first voltage divider, a second voltage divider and a third voltage divider which are connected in series; the second voltage divider is connected in parallel with a voltage measurement module; the detection circuit further comprises a second signal source and a direct current signal source; the direct current signal source is used for providing a direct current bias for the voltage measurement module; a buffer for configuring an input impedance, common mode rejection and linearity is arranged at the input end of the voltage measurement module; the voltage measurement module is used for detecting a first signal component of a second frequency on the second voltage dividerand determining whether a circuit parameter of the voltage division circuit is abnormal according to the first signal component.

Description

technical field [0001] The application belongs to the technical field of voltage detection, and in particular relates to a detection circuit and method for parameters of a voltage dividing circuit and an electric energy metering chip. Background technique [0002] The intelligent development of electric energy metering system requires the establishment of smart grid, which can help to strengthen the automation and informatization of the power grid, enhance the self-protection ability of the power grid, and better maintain the operation and safety of the power grid. The smart electric energy metering system requires the realization of digitization, standardization, networking and intelligence of electric energy metering. Its digitalization refers to the use of new technologies to realize new digital electric energy metering devices to achieve the accuracy and reliability of basic data; its intelligentization refers to the ability to store users' electricity consumption inform...

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Application Information

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IPC IPC(8): G01R35/02G01R19/25G01R15/04G01R19/32G01R22/10
CPCG01R35/02G01R19/2503G01R15/04G01R19/32G01R22/10
Inventor 赵琮陈世超许建超夏书香刘凯
Owner SHENZHEN RENERGY TECH
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