CN103647343A - Improvement method for spare power automatic switching operating mode of internal bridging line transformer substation - Google Patents

Abstract

The invention discloses an improvement method for a spare power automatic switching operating mode of an internal bridging line transformer substation. The improvement method for the spare power automatic switching operating mode of the internal bridging line transformer substation is characterized in that fifth and sixth spare power automatic switching operating modes are constructed on the basis of original four spare power automatic switching operating modes through construction of logic frame, programming, debugging, installation and inspection of the spare power automatic switching. The improvement method for the spare power automatic switching operating mode of the internal bridging line transformer substation has the advantages of solving the problem that the existing device is easy to generate large transformer nonload losses, avoiding large transformer nonload losses caused by small load at an initial commissioning stage of the transformer substation, prolonging the service life of the transformer substation, applied to increasing construction of the internal bridging line transformer substation and having significances in guaranteeing reliability of a power grid and improvement of economic returns.

Description

Improving one's methods of substation with internal bridge prepared auto restart operational mode

Technical field

The present invention relates to Power System and its Automation technical field, relate to or rather a kind of the improving one's methods of prepared auto restart operational mode of substation with internal bridge.

Background technology

Along with the development of national economy, user also progressively improves the requirement of the quality of power supply, is to save land resource and construction cost, when 110kV transformer station only has 2 during back into line and 2 main transformers, adopts internal bridge mode more.For improving the reliability of power supply, generally all install backup auto-activating device.When occurring that the system failure or other reasons are disconnected working power, it can be devoted oneself to work the power supply of stand-by power supply, stand-by equipment or other normal work rapidly automatically, and the user that original working power is disconnected restores electricity rapidly.In actual applications, backup auto-activating device should be able to respond the variation of primary connection, otherwise can not improve the reliability of power supply, can bring potential safety hazard on the contrary.Therefore the use of backup auto-activating device should be suited measures to local conditions, according to the different operational mode of transformer station action logic reasonable in design.

The current product of producing of Dan Ge prepared auto restart manufacturer can not well adapt to this internal bridge mode, the backup auto-activating device that substation with internal bridge is now equipped with needs bus connection switch to complete charge condition in co-bit, like this at transformer station's initial operation stage, institute's on-load is little, will bring larger transformer noload losses.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art improving one's methods of a kind of substation with internal bridge prepared auto restart operational mode is provided, improve existing backup auto-activating device operational mode, can adapt to preferably internal bridge mode, avoid the problems such as the transformer noload losses that existing prepared auto restart operational mode brings is large, line loss is large, equipment operating is frequent.

The invention is characterized in: by building logical framework, programming, debugging, installation, the check of prepared auto restart, on original 4 kinds of prepared auto restart operational mode bases, set up the 5th, the 6 two kind of prepared auto restart operational mode;

Obtain electric simulation amount and the status switch amount of each section of bus of substation with internal bridge and circuit, and sentence the state of each switch;

Compare with setting value, judge whether to meet a certain mode in setting value;

Judge whether to meet charge condition;

If meet charge condition, through adjusting time delay, by the prepared auto restart mode identifying, complete charging;

Complete after charging, when fault occurs, if meet the action that prepared auto restart operation condition completes prepared auto restart mode so.

Technique scheme is known, and the present invention can avoid the initial operation stage in transformer station, and institute's on-load is little, the larger transformer noload losses that may bring; Through on-the-spot application attestations such as white poplar transformer station, Si Pu transformer station, riverfront transformer stations, can effectively reduce transformer noload losses, extended the useful life of transformer, can be applicable to the construction of increasing substation with internal bridge, all significant ensureing electric network reliability, aspect increasing economic efficiency.

Accompanying drawing explanation

Fig. 1 is internal bridge schematic diagram.

Fig. 2 is schematic flow sheet of the present invention.

Fig. 3 is the 5th kind of prepared auto restart mode charging process schematic diagram of the present invention.

Fig. 4 is the 5th kind of prepared auto restart mode course of action schematic diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing, in the 5th kind of prepared auto restart mode, the present invention is further illustrated.

The present invention sets up the 5th, 6 two kinds of prepared auto restart modes and realizes by following steps:

1, set up prepared auto restart logical framework, determine the logic of new operational mode: grasping in the theory basis of current prepared auto restart operational mode the logical framework of building prepared auto restart;

2, programming, debugging: according to new operation logic, write, and debugging, last test is correct;

3, under program, fill: after device powers on, lower dress program also detects, and normal operation, meets on-the-spot service requirement;

4, check prepared auto restart logic function: can meet actual verification requirement, defencive function configuration is complete, action is quick, dependable performance; Utilize microcomputer type tester simulated failure, to the backup auto-activating device checking of testing.

As shown in Figure 1, under normal operating mode, the operation of inlet wire 1 band 1# main transformer, inlet wire 1 circuit breaker 1DL is in co-bit, and inlet wire 2 circuit breaker 2DL are in a minute position, are connected on that two sections of bus I are female, the bus connection switch 3DL of II between female be in a minute position, and 2# main transformer low-pressure side breaker thermal is standby.Because 2DL, 3DL are simultaneously at open position, 2# main transformer is out of service, has avoided no-load running.Under this operational mode, while breaking down in inlet wire 1 Huo1# main transformer district, spare power action (the 5th kind of prepared auto restart mode control word drops into), tripping inlet wire 1 switch 1DL, inlet wire 2 switch 2DL, bus connection switch 3DL close.

As shown in Figure 2:

Step S01: gather I, II section busbar voltage, the switching values such as the position of the switch of line voltage distribution and 1DL, 2DL, 3DL;

Step S02: charge condition: the charge condition of the 5th kind of prepared auto restart mode as shown in Figure 3:

(1) the female three-phase of I has pressure, and when #2 line voltage distribution checks that control word drops into, #2 circuit has pressure (Ux2);

(2) 1DL is in co-bit, and 2DL, 3DL are in a minute position;

Through prepared auto restart, after the charging interval, charged;

Step S03: operation condition: the 5th kind of prepared auto restart mode course of action as shown in Figure 4:

After charging completes, I mother's (three line voltages are all less than starting definite value with no pressure) with no pressure, Ux2 has pressure (when JXY2 drops into), I1 is without stream starting, through time delay Tt5, two pairs of switches that power supply 1 tripping operation contact action tripping power supply 1 switch (1DL), I mother need connection to cut, the switch (when JLT2 drops into) that power supply 2 tripping operation contact action tripping II mothers need connection to cut.Confirm after 1DL tripping, 1DLF tripping (when JLT1 drops into) and 2DLF tripping (during JLT2 input), and I mother (three line voltages are all less than combined floodgate definite value with no pressure) with no pressure, through Th5 time delay, close the two pairs of combined floodgate contacts and the segmentation 3DL of power supply 2.

If " accelerate prepared auto restart 56 ", control word drops into, after prepared auto restart starting, if initiatively tripping (TWJ1 is 1) of 1DL, the switch of jumping 1DL and needing connection to cut without time delay sky, logic is the same thereafter.

The 6th kind of similar the 5th kind of prepared auto restart mode of prepared auto restart mode:

The 6th kind of prepared auto restart mode charge condition:

(1) the female three-phase of II has pressure, and when inlet wire 1 line voltage distribution checks that control word drops into, inlet wire 1 circuit has pressure (Ux1);

(2) 2DL is in co-bit, and 1DL, 3DL are in a minute position;

Through prepared auto restart, after the charging interval, charged;

The 6th kind of prepared auto restart mode course of action:

After charging completes, II mother's (three line voltages are all less than starting definite value with no pressure) with no pressure, Ux1 has pressure (when JXY1 drops into), I2 is without stream starting, through time delay Tt6, two pairs of switches that power supply 2 tripping operation contact action tripping power supply 2 switches (2DL), II mother need connection to cut, the switch (when JLT1 drops into) that power supply 1 tripping operation contact action tripping I mother needs connection to cut.Confirm after 2DL tripping, 1DLF tripping (when JLT1 drops into) and 2DLF tripping (during JLT2 input), and II mother (three line voltages are all less than combined floodgate definite value with no pressure) with no pressure, through Th6 time delay, close the two pairs of combined floodgate contacts and the segmentation 3DL of power supply 1.

If " accelerate prepared auto restart 56 ", control word drops into, after prepared auto restart starting, if initiatively tripping (TWJ2 is 1) of 2DL, the switch of jumping 2DL and needing connection to cut without time delay sky, logic is the same thereafter.

Claims (1)

1. a substation with internal bridge prepared auto restart operational mode improves one's methods, it is characterized in that: by building logical framework, programming, debugging, installation, the check of prepared auto restart, on original 4 kinds of prepared auto restart operational mode bases, set up the 5th, the 6 two kind of prepared auto restart operational mode;

Obtain electric simulation amount and the status switch amount of each section of bus of substation with internal bridge and circuit, and sentence the state of each switch;

Compare with setting value, judge whether to meet a certain mode in setting value;

Judge whether to meet charge condition;

If meet charge condition, through adjusting time delay, by the prepared auto restart mode identifying, complete charging;

Complete after charging, when fault occurs, if meet the action that prepared auto restart operation condition completes prepared auto restart mode so.

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