CN109521358B - Impedance matching calculation method and system for protection device outlet relay circuit - Google Patents

Impedance matching calculation method and system for protection device outlet relay circuit Download PDF

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Publication number
CN109521358B
CN109521358B CN201811310223.2A CN201811310223A CN109521358B CN 109521358 B CN109521358 B CN 109521358B CN 201811310223 A CN201811310223 A CN 201811310223A CN 109521358 B CN109521358 B CN 109521358B
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Prior art keywords
relay
voltage
resistance value
outlet
relay circuit
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CN109521358A (en
Inventor
徐丽青
吴焱
肖文
张玮
阮青亮
卢家力
岳峰
陈新之
余华武
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Nanjing SAC Automation Co Ltd
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Nanjing SAC Automation Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/18Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis

Abstract

The invention discloses an impedance matching calculation method for an outlet relay circuit of a protection device, which comprises the following steps of calculating the input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit; calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil; calculating the percentage of the resistance value of the relay coil in the total resistance value of the outlet relay circuit; and calculating the action voltage range of the relay according to the percentage. According to the invention, the reliable action voltage range of the relay is calculated according to the input voltage range of the outlet relay circuit and the percentage of the resistance value of the relay coil, the matching of the voltage and the rated resistance of the relay is ensured, and the reliability of the protection device of the power system is improved.

Description

Impedance matching calculation method and system for protection device outlet relay circuit
Technical Field
The invention relates to a method and a system for calculating impedance matching of an outlet relay circuit of a protection device, and belongs to the field of computers.
Background
Fig. 1 shows an outlet relay circuit of a protection device, which includes a relay and a resistor, and certainly, a plurality of relays and a plurality of resistors may be connected in series, at this time, the plurality of resistors may be equal to one large resistor, coils of the plurality of relays are equal to one large coil in resistance, and the outlet relay circuit of the protection device should be within a range of 55% to 70% of an input power voltage, and 55% is reliable and inactive, and 70% is reliable and active. However, due to the inherent characteristics of the relay, the operating voltage of the relay is usually within the range of 40% -80%, the discreteness is large, and the operating voltage is not matched with the resistance value of a relay coil, so that the accuracy of the relay is poor, and the reliable operation of the power system protection device is influenced. Therefore, an impedance matching calculation method for the outlet relay circuit is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a system for calculating the impedance matching of a relay circuit at the outlet of a protection device, which are used for calculating the reliable action voltage range of a relay and ensuring that the input power supply voltage is matched with the rated resistance of the relay.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for calculating impedance matching of an outlet relay circuit of a protection device comprises the following steps,
calculating an input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit;
calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil;
calculating the percentage of the resistance value of the relay coil in the total resistance value of the outlet relay circuit;
and calculating the action voltage range of the relay according to the percentage.
The calculation formula of the input target voltage is as follows,
wherein, UoptionTo input a target voltage, UnQD<Uoption≤UQD,UnQDEqual to 55%, U, of the input supply voltageQDEqual to 70% of the input supply voltage, k being a factor.
k=2。
The calculation formula of the resistance value of the series resistor of the relay is as follows,
wherein, UoptionInputting a target voltage;when the action voltage of the relay is m% of the rated voltage of the relay, the resistance value of the series resistor of the relay is set;when the relay action voltage is m% of the rated voltage of the relay, the relay action current is obtained; rcoilIs the relay coil resistance value.
The calculation formula of the percentage is as follows,
wherein, ω isoptionThe percentage of the resistance value of the relay coil to the total resistance value of the outlet relay circuit is set;when the action voltage of the relay is m% of the rated voltage of the relay, the resistance value of the series resistor of the relay is set; rcoilIs the relay coil resistance value.
The calculation formula of the relay action voltage range is as follows,
wherein, omega is the action voltage of the selected relay, omegaoptionThe percentage of the resistance of the relay coil to the total resistance of the outlet relay circuit, UrelayFor rated voltage of the relay, UnQDEqual to 55%, U, of the input supply voltageQDEqual to 70% of the input supply voltage.
A protection device outlet relay circuit impedance matching calculation system includes,
an input target voltage calculation module: calculating an input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit;
a resistance value calculation module: calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil;
a percentage calculation module: calculating the percentage of the resistance value of the relay coil in the total resistance value of the outlet relay circuit;
a voltage range calculation module: and calculating the action voltage range of the relay according to the percentage.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a protection device outlet relay circuit impedance matching calculation method.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a protection device outlet relay circuit impedance matching calculation method.
The invention achieves the following beneficial effects: according to the invention, the reliable action voltage range of the relay is calculated according to the input voltage range of the outlet relay circuit and the percentage of the resistance value of the relay coil, the matching of the voltage and the rated resistance of the relay is ensured, and the reliability of the protection device of the power system is improved.
Drawings
FIG. 1 is a circuit diagram of an exit relay of the protection device;
FIG. 2 is a flow chart of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 2, a method for calculating impedance matching of an outlet relay circuit of a protection device includes the following steps:
step 1, calculating an input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit.
The input target voltage is the ideal output relay circuit input voltage, and the specific formula is as follows:
wherein, UoptionInputting a target voltage; input voltage range of [ U ]nQD,UQD];UnQD<Uoption≤UQD;UnQDEqual to 55% of the input supply voltage, which is typically 24V, 110V, 220V; u shapeQDEqual to 70% of the input supply voltage; k is a coefficient which can be set artificially according to the situation, and the optimal value is 2.
And 2, calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil.
The specific calculation formula is as follows:
wherein the content of the first and second substances,when the action voltage of the relay is m% of the rated voltage of the relay, the resistance value of the series resistor of the relay is set;when the relay action voltage is m% of the rated voltage of the relay, the relay action current is within the range of 40% -80%, and the relay action is ensured; rcoilIs the relay coil resistance value.
And 3, calculating the percentage of the resistance value of the relay coil to the total resistance value of the outlet relay circuit.
The specific calculation formula is as follows:
wherein, ω isoptionThe percentage of the relay coil resistance value to the total resistance value of the outlet relay circuit.
And 4, calculating the action voltage range of the relay according to the percentage.
The specific calculation formula is as follows:
where ω is the selected relay operating voltage.
According to the method, the reliable action voltage range of the relay is calculated according to the input voltage range of the outlet relay circuit and the percentage of the resistance value of the relay coil, the voltage is ensured to be matched with the rated resistance of the relay, and the reliability of the power system protection device is improved.
A protection device outlet relay circuit impedance matching calculation system, comprising:
an input target voltage calculation module: and calculating the input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit.
A resistance value calculation module: and calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil.
A percentage calculation module: and calculating the percentage of the resistance value of the relay coil to the total resistance value of the outlet relay circuit.
A voltage range calculation module: and calculating the action voltage range of the relay according to the percentage.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a protection device outlet relay circuit impedance matching calculation method.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a protection device outlet relay circuit impedance matching calculation method.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.

Claims (9)

1. A protection device outlet relay circuit impedance matching calculation method is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
calculating an input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit; the input target voltage is the ideal outlet relay circuit input voltage;
calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil;
calculating the percentage of the resistance value of the relay coil in the total resistance value of the outlet relay circuit;
and calculating the action voltage range of the relay according to the percentage.
2. The protection device outlet relay circuit impedance matching calculation method according to claim 1, characterized in that: the calculation formula of the input target voltage is as follows,
wherein, UoptionTo input a target voltage, UnQD<Uoption≤UQD,UnQDEqual to 55%, U, of the input supply voltageQDEqual to 70% of the input supply voltage, k being a factor.
3. The protection device outlet relay circuit impedance matching calculation method according to claim 2, characterized in that: k is 2.
4. The protection device outlet relay circuit impedance matching calculation method according to claim 1, characterized in that: the calculation formula of the resistance value of the series resistor of the relay is as follows,
wherein, UoptionInputting a target voltage;when the action voltage of the relay is m% of the rated voltage of the relay, the resistance value of the series resistor of the relay is set;for relay operating voltage to be relayWhen the rated voltage of the electric appliance is m%, the relay acts on the current; rcoilIs the relay coil resistance value.
5. The protection device outlet relay circuit impedance matching calculation method according to claim 1, characterized in that: the calculation formula of the percentage is as follows,
wherein, ω isoptionThe percentage of the resistance value of the relay coil to the total resistance value of the outlet relay circuit is set;when the action voltage of the relay is m% of the rated voltage of the relay, the resistance value of the series resistor of the relay is set; rcoilIs the relay coil resistance value.
6. The protection device outlet relay circuit impedance matching calculation method according to claim 1, characterized in that: the calculation formula of the relay action voltage range is as follows,
wherein, omega is the action voltage of the selected relay, omegaoptionThe percentage of the resistance of the relay coil to the total resistance of the outlet relay circuit, UrelayFor rated voltage of the relay, UnQDEqual to 55%, U, of the input supply voltageQDEqual to 70% of the input supply voltage.
7. A protection device outlet relay circuit impedance matching calculation system is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
an input target voltage calculation module: calculating an input target voltage of the outlet relay circuit according to the input voltage range of the outlet relay circuit; the input target voltage is the ideal outlet relay circuit input voltage;
a resistance value calculation module: calculating the resistance value of the series resistor of the relay according to the input target voltage, the relay action current and the resistance value of the relay coil;
a percentage calculation module: calculating the percentage of the resistance value of the relay coil in the total resistance value of the outlet relay circuit;
a voltage range calculation module: and calculating the action voltage range of the relay according to the percentage.
8. A computer readable storage medium storing one or more programs, characterized in that: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform any of the methods of claims 1-6.
9. A computing device, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-6.
CN201811310223.2A 2018-11-06 2018-11-06 Impedance matching calculation method and system for protection device outlet relay circuit Active CN109521358B (en)

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