CN109949388B - Multi-calculation power system vector operation device and drawing method - Google Patents
Multi-calculation power system vector operation device and drawing method Download PDFInfo
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- CN109949388B CN109949388B CN201910101253.0A CN201910101253A CN109949388B CN 109949388 B CN109949388 B CN 109949388B CN 201910101253 A CN201910101253 A CN 201910101253A CN 109949388 B CN109949388 B CN 109949388B
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Abstract
The invention discloses a multi-item calculation power system vector operation device and a drawing method, which relate to a method for quickly and accurately drawing a power system vector diagram by taking a mobile phone APP as a carrier and a sequence component calculation and power calculation and vector operation method.
Description
Technical Field
The invention relates to a vector operation device and a drawing method, in particular to a vector operation device and a drawing method of a power system capable of performing multiple calculation.
Background
In power work, a vector diagram is often required to be drawn, after on-site vector measurement, the phase relation of each quantity is required to be drawn into the vector diagram, and especially, professions such as metering, relay protection and the like often need to draw the vector diagram. The relay protection profession utilizes a vector diagram to carry out differential detection, analyze asymmetric faults, judge whether secondary wiring is correct, judge system capacitive susceptibility, judge whether phase sequences and three phases are symmetric, judge transformer connection groups and the like; the metering profession uses the vector diagram to perform the work of electric energy metering, electricity utilization inspection, electric power inspection, meter loading, electricity connection and the like. At present, two main methods exist for drawing a vector diagram in the field work of a power system:
one method is to manually draw a vector diagram on paper by hand after a worker measures the vector magnitude and angle. Manually drawing a vector diagram has the following problems that the drawing speed is low; drawing is rough, and the relation between the amplitude and the phase of the vector cannot be accurately reflected; the rapid calculation of the negative sequence and the zero sequence vector cannot be realized; the power and the power factor cannot be automatically calculated according to the voltage and the current vectors; the addition and subtraction operation of the vector and the calculation of the number product cannot be accurately and rapidly realized.
Another method is to draw with a phase tester, measure each electric quantity using a phase tester having a drawing function, and draw a vector diagram. The method has the following problems that the calculation of the negative sequence and the zero sequence vector cannot be realized; the single set of phase tester with drawing function is expensive; repeated investments are required. If the device is popularized and used, each working group needs to be provided with one set, and a large number of repeated purchases are needed; the instrument is heavy and not easy to carry.
Therefore, the two methods are not suitable for large-scale popularization and application.
Disclosure of Invention
Based on the shortcomings in the prior art mentioned in the background art, the invention provides a power system vector operation device capable of performing multiple calculations and a drawing method.
The invention adopts the following technical scheme to overcome the technical problems, and specifically comprises the following steps:
the utility model provides a but electric power system vector operation device and drawing method of multiple calculation, includes the device body, device body connection terminal, is equipped with APP in the terminal, install the collection unit that is used for measuring each vector in the device body, the collection unit has an input and an output, input signal connection terminal, the collection unit output data connect be used for the vector in the input of the calculation unit of projection length calculation of axis of ordinates, wherein, the calculation unit has four outputs, be first output, second output, third output and fourth output respectively; the first output end of the calculating unit is in signal connection with the input end of the drawing unit for drawing the vector diagram in the rectangular coordinate system, the drawing unit is provided with two input ends, the first output end of the calculating unit is in signal connection with the first input end of the drawing unit, the second output end of the calculating unit is in signal connection with the input end of the component unit for calculating positive sequence, negative sequence and zero sequence components, and the output end of the component unit is in signal connection with the second input end of the drawing unit.
As a further scheme of the invention: and the third output end of the calculating unit is in signal connection with the input end of the power unit for calculating active power, reactive power, apparent power and power factor.
As still further aspects of the invention: the fourth output end of the calculating unit is in signal connection with the input end of the calculating unit for carrying out vector addition and subtraction operation and quantity product operation.
As still further aspects of the invention: the device body is connected with the terminal in a data line connection mode, a Bluetooth connection mode or a WiFi wireless connection mode.
As still further aspects of the invention: the terminal is a mobile phone, a tablet PC or a smart watch.
As still further aspects of the invention: and the third output end of the calculating unit is in signal connection with the input end of the power unit for calculating active power, reactive power, apparent power and power factor.
A drawing method of a power system vector operation device capable of carrying out multiple calculations comprises the following steps:
step one, drawing vectors, wherein the drawing of the vectors is divided into the following three steps:
s1, measuring each vector, inputting vector amplitude and angle in a mobile phone APP, generating a vector diagram and drawing the vector diagram in a rectangular coordinate system;
s2, rapidly generating a three-phase vector diagram according to one phase of the three-phase symmetrical system;
s3, rapidly converting a phase voltage vector diagram and a line voltage vector diagram;
step two, calculating sequence components, wherein the sequence components are calculated in the following two steps;
s21, inputting the amplitude and angle of three-phase current in APP, calculating positive sequence, negative sequence and zero sequence current components and drawing;
s22, inputting the amplitude and the angle of the three-phase voltage in the APP, calculating positive sequence, negative sequence and zero sequence voltage components and drawing;
step three, power calculation, namely, inputting the amplitude and angle of voltage and current vectors in the APP, and calculating active power, reactive power, apparent power and power factor;
step four, vector operation, wherein the vector operation comprises the following two steps;
s41, vector addition and subtraction operation, namely inputting the amplitude and the angle of each vector in the APP, and outputting an operation result;
s42, carrying out quantity product operation, inputting the amplitude and the angle of each vector in the APP, and outputting an operation result.
After adopting the structure, compared with the prior art, the invention has the following advantages: the mobile phone APP is used as a carrier, and the method and the device for rapidly and accurately drawing the vector diagram, the calculation sequence component, the calculation power and the vector operation of the power system are provided, so that the speed and the accuracy of drawing the vector diagram are greatly improved, human errors are avoided, the working efficiency is improved, the intelligent drawing is realized, the specialized rapid drawing of complex vector diagrams such as metering, relay protection and the like is facilitated, and the calculation and the drawing of positive sequence, negative sequence and zero sequence components are realized. When the system has asymmetric faults such as short circuit, broken line and the like, the negative sequence component and the zero sequence component are rapidly calculated, a basis is provided for fault judgment of the power system, the fault judgment and positioning speed is improved, and the system is convenient to carry. If each working group is provided with a set of phase tester with a drawing function, the phase tester is a huge investment, and the invention takes the mobile phone APP as a carrier, and can be popularized and installed in a large scale in a free way in the mobile phones of staff only by one-time investment research and development, thereby saving a large amount of investment.
Drawings
Fig. 1 is a flowchart of an operation of a power system vector computing device using a plurality of calculable items.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Example 1
Referring to fig. 1, in an embodiment of the present invention, a multi-item computing power system vector computing device includes a device body, where the device body is connected to a terminal, and a specific connection manner may be a data line connection, a bluetooth connection or a WiFi wireless connection manner, where the terminal is not limited, and an APP is installed in the terminal, where the terminal may be a mobile phone, a tablet PC, a smart watch, etc., and by opening the APP in the terminal, each parameter is input into the device body by means of the terminal; the device is characterized in that an acquisition unit for measuring each vector is arranged in the device body, the acquisition unit is provided with an input end and an output end, the input end is in signal connection with a terminal, the amplitude and the angle of each vector can be input into the acquisition unit through an APP, the output end of the acquisition unit is in data connection with the input end of a calculation unit for calculating the projection length of the vector on the transverse axis and the longitudinal axis, the calculation unit is provided with four output ends, namely a first output end, a second output end, a third output end and a fourth output end, the calculation unit calculates the projection length of the vector on the transverse axis and the longitudinal axis according to the amplitude and the angle of the vector transmitted in the acquisition unit, and the end point coordinates of the vector are determined.
The first output end of the calculating unit is in signal connection with the input end of the drawing unit for drawing the vector diagram in the rectangular coordinate system, further, the drawing unit is provided with two input ends, the first output end of the calculating unit is in signal connection with the first input end of the drawing unit, the drawing unit draws the vector diagram in the rectangular coordinate system according to the vector endpoint coordinates input from the calculating unit, the second output end of the calculating unit is in signal connection with the input end of the component unit for calculating positive sequence, negative sequence and zero sequence components, the component unit calculates the positive sequence, negative sequence and zero sequence components by utilizing the symmetrical component method through the axial projection length of the three-phase vector provided by the calculating unit, and the component unit is in signal connection with the second input end of the drawing unit and draws the vector diagram of the positive sequence, the negative sequence and the zero sequence components through the drawing unit.
The third output end of the calculating unit is in signal connection with the input end of the power unit for calculating the active power, the reactive power, the apparent power and the power factor, and the power unit calculates the active power, the reactive power, the apparent power and the power factor according to the axial length of the voltage vector and the current vector in the calculating unit.
The fourth output end of the computing unit is in signal connection with the input end of the computing unit for carrying out vector addition and subtraction operation and number product operation, and the computing unit carries out vector addition and subtraction operation and number product operation according to the axial length of the vector in the computing unit.
Example 2
In order to further explain the above-mentioned multi-computable power system vector computing device, the present application provides a further embodiment, which specifically describes a drawing method of the multi-computable power system vector computing device, which has the steps of:
step one, drawing vectors, wherein the drawing of the vectors is divided into the following three steps:
s1, measuring each vector, inputting vector amplitude and angle in a mobile phone APP, generating a vector diagram and drawing the vector diagram in a rectangular coordinate system;
s2, rapidly generating a three-phase vector diagram according to one phase of the three-phase symmetrical system;
s3, rapidly converting the phase voltage vector diagram and the line voltage vector diagram, namely rapidly calculating the phase voltage from the line voltage and drawing, and rapidly calculating the line voltage from the phase voltage and drawing;
step two, calculating sequence components, wherein the sequence components are calculated in the following two steps;
s21, inputting the amplitude and the angle of three-phase current in APP, calculating positive sequence, negative sequence and zero sequence current components by using a symmetrical component method, and drawing;
s22, inputting the amplitude and the angle of the three-phase voltage in the APP, calculating positive sequence, negative sequence and zero sequence voltage components by using a symmetrical component method, and drawing;
step three, power calculation, namely, inputting the amplitude and angle of voltage and current vectors in the APP, and calculating active power, reactive power, apparent power and power factor;
step four, vector operation, wherein the vector operation comprises the following two steps;
s41, vector addition and subtraction operation, namely inputting the amplitude and the angle of each vector in the APP, and outputting an operation result;
s42, carrying out quantity product operation, inputting the amplitude and the angle of each vector in the APP, and outputting an operation result.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. It is intended that all such variations as fall within the scope of the appended claims.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Claims (3)
1. The utility model provides a but electric power system vector operation device of multiple calculation, includes the device body, device body connection terminal, is equipped with APP in the terminal, and characterized in that, install the collection unit that is used for measuring each vector in the device body, collection unit has an input and an output, input signal connection terminal, and collection unit output data connect the input of the calculation unit that is used for the projection length calculation of vector in horizontal axis and vertical axis, wherein, the calculation unit has four outputs, are first output, second output, third output and fourth output respectively; the first output end of the computing unit is in signal connection with the input end of the drawing unit for drawing the vector diagram in the rectangular coordinate system, the drawing unit is provided with two input ends, the first output end of the computing unit is in signal connection with the first input end of the drawing unit, the second output end of the computing unit is in signal connection with the input end of the component unit for computing positive sequence, negative sequence and zero sequence components, and the output end of the component unit is in signal connection with the second input end of the drawing unit;
the third output end of the calculating unit is in signal connection with the input end of the power unit for calculating active power, reactive power, apparent power and power factor;
the fourth output end of the computing unit is in signal connection with the input end of the computing unit for carrying out vector addition and subtraction operation and number product operation;
the method for drawing by using the power system vector operation device capable of calculating multiple items comprises the following steps:
step one, drawing vectors, wherein the drawing of the vectors is divided into the following three steps:
s1, measuring each vector, inputting vector amplitude and angle in a mobile phone APP, generating a vector diagram and drawing the vector diagram in a rectangular coordinate system;
s2, rapidly generating a three-phase vector diagram according to one phase of the three-phase symmetrical system;
s3, rapidly converting a phase voltage vector diagram and a line voltage vector diagram;
step two, calculating sequence components, wherein the sequence components are calculated in the following two steps;
s21, inputting the amplitude and angle of three-phase current in APP, calculating positive sequence, negative sequence and zero sequence current components and drawing;
s22, inputting the amplitude and the angle of the three-phase voltage in the APP, calculating positive sequence, negative sequence and zero sequence voltage components and drawing;
step three, power calculation, namely, inputting the amplitude and angle of voltage and current vectors in the APP, and calculating active power, reactive power, apparent power and power factor;
step four, vector operation, wherein the vector operation comprises the following two steps;
s41, vector addition and subtraction operation, namely inputting the amplitude and the angle of each vector in the APP, and outputting an operation result;
s42, carrying out quantity product operation, inputting the amplitude and the angle of each vector in the APP, and outputting an operation result.
2. The multi-calculation power system vector calculation device according to claim 1, wherein the connection mode of the device body and the terminal is data line connection, bluetooth connection or WiFi wireless connection.
3. The multi-computable power system vector computing device of claim 1, wherein the terminal is a cell phone or a tablet PC or a smart watch.
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