CN105425101A - Electric power system fault recording playback method - Google Patents

Abstract

The invention discloses an electric power system fault recording playback method. The method comprises the following steps: utilizing two Pictureboxes to achieve interactive drawing, wherein the painting canvas Picturebox1 is used for drawing an oscillogram and the Picturebox2 is used for drawing an amplification rectangular frame and positioning a cursor, adopting a dual-buffering technology, drawing all panels in a buffer area when drawing the panels and channels, and then drawing once on the Pictureboxes; reducing a sampling rate when a global graph is displayed; drawing according to the actual number of sampling points when checking a local graph; and only drawing points within a time interval observable by a user after waveform amplification and translation. In this way, oscillograms are prevented from being drawn repeatedly when the amplification rectangular frame is drawn or the cursor is moved, and smoothness is improved.

Description

A kind of Power System Fault Record back method

Technical field

The invention belongs to electric power system fault playback technology field, more specifically, relate to a kind of Power System Fault Record back method.

Background technology

For many years; fault wave recording device based on microcomputer; electric network fault can be recorded front and back electric parameters and state change process information occur; by failure wave-recording playback reproducer; can the action behavior of instantaneous variation intactly after faults and relay protection; become analytic system accident, particularly analyze the important evidence of relay protection action behavior.

There is following problem in existing fault recurrence method:

(1) fault wave recording device is in order to improve the precision of fault analysis (as fault localization), sampling rate can be very high, and data volume is very large, causes playback drawing panel needing the point of drafting a lot, every two points need draw one section of straight line, and it is not high that waveform redraws efficiency;

(2) in the procedure for displaying of waveform, need in same panel, show hyperchannel (as three-phase voltage current), be convenient to com-parison and analysis, what turn increase that panel draws like this counts;

(3) when being amplified rectangle frame by drafting and checking that waveform local or dragging cursor locate sampling point information, mouse is often mobile, and once waveform need redraw once, causes whole amplification process waveform constantly to redraw, and drafting efficiency is not high like this.

Summary of the invention

For the problems referred to above, the invention provides a kind of Power System Fault Record back method, its object is to solve panel draws and count many, the problem such as constantly need to redraw, improve and draw efficiency.

For achieving the above object, the present invention is by the following technical solutions:

A kind of Power System Fault Record back method, comprises the following steps:

(1) detect the mouse response events of painting canvas Picturebox1 and Picturebox2, if detected, then perform step (8); If do not detected, then perform step (2);

(2) selector channel name, and the Wave data of fetch channel name correspondence position in the data file;

(3) take double buffering graphics display technology, in internal memory, create the buffer zone Bitmap consistent with painting canvas Picturebox1, next draw in this buffer zone;

(4) judge X-axis scaling coefficient fZoomX, if coefficient is greater than 1/nGid, show to be now overall display state, nGrid remains unchanged; If coefficient is less than or equal to 1/nGid, show, now for checking local state, nGrid to be set to 1, wherein, nGrid represents that every several data point gets the parameter that a point carries out drawing;

(5) every nGrid point gets a point, according to the position StartTimeLoc of current window timing node in whole timing node and amplify rectangle frame and produce X-axis off-set value nXChange and X-axis scaling coefficient fZoomX, calculate drawing starting point nStartPoint and terminal nEndPoint;

(6) according to waveforms amplitude at the position StartTimeLoc of whole Y-axis window and amplify the vertical magnification reference position of rectangle frame, obtain Y-axis scaling fZoomY, Y-axis off-set value nYChange, drawing starting point nStartPoint in integrating step (5) and terminal nEndPoint, and X-axis scaling fZoomX, X-axis off-set value nXChange draw on the Bitmap of buffer zone, and call the drawing image function of Picturebox1, the image on Bitmap is drawn out in painting canvas Picturebox1;

(7) now draw complete, painting canvas PictureBox1 enters into and waits for mouse response phase;

(8) the mouse-click event of Picturebox1 or Pictureobox2 is detected, judge whether this mouse-click event is draw amplification rectangle frame or whether is cursor location, if this mouse-click event is one of them, then current active painting canvas switches to Picturebox2, response events is moved according to mouse, obtain physical coordinates position e.X and e.Y of mouse, calculate the width and length that amplify rectangle frame, then the refreshing function of painting canvas Picturebox2 is called, painting canvas Picturebox2 constantly redraws, mouse moves a pixel, Picturebox2 just redraws once, if this mouse-click event is not one of them, then terminate to draw,

(9) the mouse pine detecting Picturebox1 or Pictureobox2 plays event, if mouse up detected, the coordinate recorded when the coordinate recorded when then pressing according to mouse and mouse up, calculate fZoomX, nXChange, fZoomY, nYChange, and return step (3), complete Picturebox1 and redraw; If mouse up event do not detected, then continue to detect this event.

The present invention has following beneficial effect: what decrease that waveform need draw counts, and avoids constantly redrawing of Picturebox, substantially increases drawing efficiency.

Accompanying drawing explanation

Fig. 1 is the process flow diagram of the Power System Fault Record back method that the present invention proposes.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is further elaborated.

In general, the present invention adopts following measures to improve drafting efficiency:

Adopt two Picturebox Interactive Drawing, wherein painting canvas Picturebox1 is used for drawing waveforms figure, Picturebox2 for drawing amplification rectangle frame and positioning cursor.Can avoid so constantly redrawing oscillogram when drawing and amplifying rectangle frame or drag cursor, improve fluency.

Employing double buffering technology is drawn, and like this at drafting multi-panel, during hyperchannel, is first plotted in buffer zone by all panels, then disposablely draws on Picturebox, substantially increase drawing efficiency like this.

During display overall situation figure, take every several point to get a point, be equivalent to and reduce sampling rate, still can demonstrate the Changing Pattern of waveform; Check local time, then draw by real sampling number, make the minimizing of counting of display on painting canvas Picturebox like this, during drawing, efficiency improves.

After waveform amplification translation, only draw the point in user's SEE time interval, so more amplify, counting of the upper drafting of Picturebox is fewer, and Consumer's Experience is more smooth.

Specifically, in the present embodiment, Power System Fault Record back method, comprises the following steps:

(1) detect the mouse response events of painting canvas Picturebox1 and Picturebox2, if detected, then perform step (8); If do not detected, then perform step (2);

(2) selector channel name, and the Wave data of fetch channel name correspondence position in the data file;

(3) take double buffering graphics display technology, in internal memory, create the buffer zone Bitmap consistent with painting canvas Picturebox1, next draw in this buffer zone;

(4) judge X-axis scaling coefficient fZoomX, if coefficient is greater than 1/nGid, show to be now overall display state, nGrid remains unchanged; If coefficient is less than or equal to 1/nGid, show, now for checking local state, nGrid to be set to 1, wherein, nGrid represents that every several data point gets the parameter that a point carries out drawing;

Wherein, fZoomX<1 represents amplification.

(5) every nGrid point gets a point, according to the position StartTimeLoc of current window timing node in whole timing node and amplify rectangle frame horizontal magnification reference position, obtain X-axis off-set value nXChange and X-axis scaling coefficient fZoomX, calculate drawing starting point nStartPoint and terminal nEndPoint.So only need draw between user visible range, greatly reduce counting of need drawing;

(6) according to waveforms amplitude at the position StartTimeLoc of whole Y-axis window and amplify the vertical magnification reference position of rectangle frame, obtain Y-axis scaling fZoomY, Y-axis off-set value nYChange, drawing starting point nStartPoint in integrating step (5) and terminal nEndPoint, and X-axis scaling fZoomX, X-axis off-set value nXChange, to draw on the Bitmap of buffer zone, and call the drawing image function of Picturebox1, the image on Bitmap is drawn out in painting canvas Picturebox1;

(7) now draw complete, painting canvas PictureBox1 enters into and waits for mouse response phase;

(8) the mouse-click event of Picturebox1 or Pictureobox2 is detected, judge whether this mouse-click event is draw amplification rectangle frame or whether is cursor location, if this mouse-click event is one of them, then current active painting canvas switches to Picturebox2, namely painting canvas PictureBox2 is visible, and Picturebox1 hides.Response events is moved according to mouse, obtain physical coordinates position e.X and e.Y of mouse, calculate the width and length that amplify rectangle frame, then the refreshing function of painting canvas Picturebox2 is called, painting canvas Picturebox2 constantly redraws, mouse moves a pixel, and Picturebox2 just redraws once; If this mouse-click event is not one of them, then terminate to draw.

Wherein, amplify rectangle frame and cursor owing to drawing on painting canvas Picturebox2, a lot of waveform of counting need not be drawn, therefore greatly improve drawing efficiency.

(9) the mouse pine detecting Picturebox1 or Pictureobox2 plays event, if mouse up detected, the coordinate recorded when the coordinate recorded when then pressing according to mouse and mouse up, calculate fZoomX, nXChange, fZoomY, nYChange, and return step (3), complete Picturebox1 and redraw; If mouse up event do not detected, then continue to detect this event.

Such waveform only need redraw once at whole dynamic drafting amplification rectangle frame or positioning cursor process intermediate value.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (1)

1. a Power System Fault Record back method, comprises the following steps:

(1) detect the mouse response events of painting canvas Picturebox1 and Picturebox2, if detected, then perform step (8); If do not detected, then perform step (2);

(2) selector channel name, and the Wave data of fetch channel name correspondence position in the data file;

(3) take double buffering graphics display technology, in internal memory, create the buffer zone Bitmap consistent with painting canvas Picturebox1, next draw in this buffer zone;

(4) judge X-axis scaling coefficient fZoomX, if coefficient is greater than 1/nGid, show to be now overall display state, nGrid remains unchanged; If coefficient is less than or equal to 1/nGid, show, now for checking local state, nGrid to be set to 1, wherein, nGrid represents that every several data point gets the parameter that a point carries out drawing;

(5) every nGrid point gets a point, according to the position StartTimeLoc of current window timing node in whole timing node and amplify rectangle frame and produce X-axis off-set value nXChange and X-axis scaling coefficient fZoomX, calculate drawing starting point nStartPoint and terminal nEndPoint;

(6) according to waveforms amplitude at the position StartTimeLoc of whole Y-axis window and amplify the vertical magnification reference position of rectangle frame, obtain Y-axis scaling fZoomY, Y-axis off-set value nYChange, drawing starting point nStartPoint in integrating step (5) and terminal nEndPoint, and X-axis scaling fZoomX, X-axis off-set value nXChange draw on the Bitmap of buffer zone, and call the drawing image function of Picturebox1, the image on Bitmap is drawn out in painting canvas Picturebox1;

(7) now draw complete, painting canvas PictureBox1 enters into and waits for mouse response phase;

(8) the mouse-click event of Picturebox1 or Pictureobox2 is detected, judge whether this mouse-click event is draw amplification rectangle frame or whether is cursor location, if this mouse-click event is one of them, then current active painting canvas switches to Picturebox2, response events is moved according to mouse, obtain physical coordinates position e.X and e.Y of mouse, calculate the width and length that amplify rectangle frame, then the refreshing function of painting canvas Picturebox2 is called, painting canvas Picturebox2 constantly redraws, mouse moves a pixel, Picturebox2 just redraws once, if this mouse-click event is not one of them, then terminate to draw,

(9) the mouse pine detecting Picturebox1 or Pictureobox2 plays event, if mouse up detected, the coordinate recorded when the coordinate recorded when then pressing according to mouse and mouse up, calculate fZoomX, nXChange, fZoomY, nYChange, and return step (3), complete Picturebox1 and redraw; If mouse up event do not detected, then continue to detect this event.