JPS59116821A - Operating method of transformer tap position - Google Patents

Abstract

PURPOSE:To eliminate malfunction and to speed up processing by deciding on the direction and frequency of tap operation and performing tap control according to the result of a comparison between a reference tap value and a tap value to be operated, and comparing tap values before and after the control with each other and performing nonreaction processing. CONSTITUTION:The tap value of the transformer PT1 of a device 2 to be controlled is inputted from a TC slave station TC1 to the TC master station TV of a control system 1. At this time, the reference tap value is also transmitted and the system 1 compares both tap values with each other. Consequently, when both are not coincident with each other, a tap decrease or increase is commanded according to whether the tap value is larger or smaller than the reference tap value. Then, a decision on whether the tap value varies or not is made a specific time later and when the tap value does not coincide with the reference tap value, tap control is carried out at a specific frequency; and then the tap values before and after the control are compared with each other to perform the nonreaction processing. Thus, the tap operation is carried out accurately to speed up reaction confirming processing.

Description

[Detailed Description of the Invention] This invention provides two
In recent years, power system monitoring has come to employ a control system that is displayed as a skeleton screen on the system monitoring panel. In order to check all the tap positions between the transformers of the power transmission substation using information transmitted from a remote monitoring and control device (hereinafter referred to as TC) on such a system monitoring panel, the skeleton screen t-CRT is used.
It was displayed on the screen, and the operator was operating it while visually observing it.

For this reason, there were the following problems.

+1) After checking the tap positions between the transformers on the skeleton screen, it is necessary to judge the difference and determine the operating direction (the direction in which the taps go up and down). There are seven n.

(21) Since there is no response state change (state change) to the lifting/lowering operation of the transformer tap, the operator must memorize the tag position information transmitted from the TC before the operation. It takes time to confirm the response.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a transformer tap position operation method that eliminates the expense of erroneous operation and speeds up the response confirmation process. purpose.

An embodiment of the present invention will be fully described below with reference to the drawings.

In FIG. 1, l is a power system monitoring and control system, and this system l is a central processing unit (CPU).

Memory (MOR), display (CRT), operation desk (OPD), TC interface (INF) 2 and T
c formed from the master station (TC), each with a pass line (
BUS). is a controlled device, and this device λ is a plurality of controlled devices, which are transformers with on-load tap switching (PTl), (PT2), , (PTrl).
and a plurality of TC slave stations (TCθ
, (T Cz) ... (T Cn). The TC slave station (T el) of the controlled device (T
ea)...(TC!n) is the control system 1OT
It is connected to the C master station (TO). P5 Figure 1 does not show the system monitoring panel, which displays the transformer tap positions as a skeleton screen, but it is electrically connected to the control system 1, and the skeleton screen at the tap positions is not shown. The screen is displayed on a display (CRT).

Here, the tap position switching information (operation target tap position am information) of the transformer (PTθ) of the controlled device is transferred to the TC slave station ('r c
Suppose that an input signal is input to the Tc master station (TO) of the control system l from T). When the above information is sent, the reference tap position txt information is also sent, so the control system
Then, both tap positions are processed according to the flowchart shown in FIG.

The operation of this embodiment will be described below according to the flowchart shown in FIG.

First, tap position information (hereinafter referred to as tap value) is compared to see if the reference tap value and the operation target tap value match. If rNOJ is determined as a result of this comparison, the determined output is input to a tap position operation direction determining means that compares all the tap values that are larger or smaller than the reference tap value. If the winning result of this determining means is rYEsJ, a tap-up command is sent out by the selection output of the elevating/lowering position selection by the tag control means. Tap up command is sent n
After a predetermined period of time, it is determined whether the tag value has changed or not. When it is determined that the tag value has changed, it is determined whether the tag value matches the reference tag value or not, and when it is rNOJ, the command is input to a command comparing means for generating a command to further raise the tag position n or more times. The means of comparison is n
If the command is "NO" more than once, the process returns to the raising command process again.

When rYESJ, the elevator position selection is canceled, a refractory process is performed, and the operation is terminated.

Further, in the case of the tap control means, when the reference tap value and the operation target tap value match, rYEsJ is established, and the operation is completed through the lifting/lowering position selection cancellation. Furthermore, when there is no change in the tap value, rNOJ is established, and the operation is terminated by canceling the selection of the vertical position as shown in the figure.

In addition, in FIG. 2, the 70-chart on the right side of the figure is for a command to lower the tap operation.

FIG. 3 is a flowchart extracting and showing the main parts of the flowchart in FIG. 2. In FIG. is the reference tap 1st section, p the target tap value is larger, n
It is given to means B for determining the number of times in the direction of operation which determines the operating direction of the raising command (rising force) and the lowering command (lowering direction) and the number of times the tag is operated. As a result of the control, the tap value is controlled by the tap control means C, and as a result, the tag operates.
This is monitored by the refractory monitoring means, and when the tap does not operate, refractory processing Gt is performed. If the tap operates normally, the second comparison means E compares whether the value of Tara 7 and the reference 1ik match, and if they match, the process ends, and if they do not match, the process is repeated for the number of times the tap is controlled. Returns whether or not the second refractory motion C has been controlled.Furthermore, if the control has been performed the entire number of times, refractory processing is performed.

The above operations are performed by turning on/off the mask-control switch of the operating desk (OPD) and by operating the display (CRT) L symbol on the skeleton screen.

As described above, according to the present invention, after comparing the reference tag value and the operation target tap value, the direction and number of tap operations are determined based on the magnitude of both tap values, and the tap operation is fully controlled. Since the tack control performs refractory processing by comparing all control waves with those before p control, the tap position can be operated accurately to automatically operate the tap position, and changes in the target ramp position can be monitored. However, if there is no change, the same processing as the non-response of normal equipment operation is performed, so the processing can be speeded up, which has the advantage of simplifying the work.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are flow charts for explaining the operation of FIG. 1. /...Control system, λ...Controlled device, CPU midstream processing device, MOR...Memo! J, CRT...display, OPD...-1? Working desk, INT...TC
Interface, P Tr a P Tm p=・P
Trf "Transformer, TC/TC master station, TCt. TCi,...TCn...TC slave station.

Claims (1)

[Claims] (1) In the power system monitoring and control system, the tap positions between the transformers of the power transmission substation are displayed on the system monitoring panel, and the reference tap information and operation target tap information are transmitted from the total distance monitoring and control device for the tap positions. In the method of operating the tap position by: a first comparing means for comparing the two information groups; and, based on the result of the comparing means, the p reference tap information is determined from the magnitude of the operation target tap information, the tap rises,
an operation direction 2 and number determination means for determining the descending direction and the number of tap operations; a tap control means for fully controlling the taps to the tap position determined by the determination means; and a tap position controlled by the control means. a first refractory monitoring means that compares the value before and after the control and performs refractory processing if there is no change; 2. A transformer tap position f&operation method comprising a second comparing means and a second refractory monitoring means that performs refractory operation processing when the total number of tap operations is performed.