CN102904334A - Matrix locking method of spare power automatic switching device - Google Patents

Abstract

The invention relates to a matrix locking method of a spare power automatic switching device. The method comprises the following steps of: inputting all quantities of spare power automatic switching actions to be locked, which serve as inputs, to the spare power automatic switching device, and defining the inputs as an input matrix K; setting a locking control word matrix A; when the spare power automatic switching device operates, performing operation according to the original logic of the spare power automatic switching actions until the spare power automatic switching actions are performed; if the actions are required, determining an action mode to be operated, and if a k-th spare power automatic switching mode is operated, taking out a k-th line from the matrix A; multiplying the k-th line matrix in the input matrix K by the k-th line matrix in the locking control word matrix A; and if a result D is equal to zero, not locking, and if D is not equal to zero, locking the spare power automatic switching actions. By adoption of the method, the main logic of the original spare power automatic switching actions can be unchanged, after various protection devices act, the logic of a specific spare power automatic switching action mode can be locked as required, and the working efficiency of spare power automatic switching construction and debugging can be improved.

Description

The matrix blocking method of backup auto-activating device

Technical field

The present invention relates to the control technology of electrical power trans mission/distribution system, specifically a kind of matrix blocking method of the backup auto-activating device for automatic throw-in equipment of emergency power supply is controlled.

Background technology

Along with expanding economy, electrical network is more and more higher to the requirement of power supply reliability, and automatic throw-in equipment of emergency power supply (abbreviation backup auto-activating device) both can increase power supply reliability, also can dwindle power failure range simultaneously, guarantees the power supply continuation.Therefore, after newly-built or comprehensive automation was transformed, backup auto-activating device had all been installed by 110kV transformer station.But, guarantee that prepared auto restart is correct, safe action, the action logic of prepared auto restart in the time of must considering subordinate's fault.At present, backup auto-activating device opens to satisfy locking under the specific condition by locking is set.For example, in 110kV transforming plant main transformer differential protection, high backup protection, the main body protection action situation, again send electricity to faulty equipment in order to prevent backup auto-activating device, cause equipment further to damage, need to according to actual conditions, carry out locking to backup auto-activating device.Science, rationally, easy to understand, the closedown mode that arranges flexibly be conducive to better bring into play the effect of prepared auto restart.

Prepared auto restart is by the meaning of mode locking: if all block signals are in parallel, open into the locking prepared auto restart as same, possible errors locking backup auto-activating device causes the expansion power failure range.

For example, 110kV adopts standard substation with internal bridge (its main electrical scheme as shown in Figure 1), and when a line became mode for two, 3DL was running status, and backup auto-activating device is the standby throwing mode of inlet wire.1DL is for whole loads, and the 2DL stand-by heat is during as the available power supply, and the action of 1B differential protection with tripping 1DL, 3DL, causes full station dead electricity.Satisfy inlet wire prepared auto restart operation condition this moment, prepared auto restart should tripping 1DL after, 2DL on the automatic pressing because fault coverage is in 1B three side current transformers, so 2B can normally move.The prepared auto restart action can ensure that a halfload recovers rapidly, avoids full station to have a power failure.If all block signals are in parallel; open into the locking prepared auto restart as same; the 1B differential protection is with the action of locking prepared auto restart; the power failure of user in the 2B supply district will be caused; enlarge power failure range; cause simultaneously full station to have a power failure, the normal running of the equipment such as the full station of impact isolating switch increases the operating time that restores electricity.

That uses in the prior art comprises following two kinds by the mode closedown mode:

1, a kind of mode by mode locking prepared auto restart is that existing wiring is opened into mode, be exactly protection system manufacturer provide respectively the locking of various prepared auto restart modes open into, designer with difference protect actuating signal access respectively corresponding locking open into.This mode mainly contains following shortcoming:

(1) because design is different, producer's equipment is different, and the prepared auto restart logic of each transformer station is not quite similar, and need to verify one by one inefficiency according to on-the-spot drawing during examination.

(2) if discovery logic problem in checking and accepting needs to change wiring, workload is large, transforms, dangerous source point is many in the enlarging construction, transforms wiring attractive in appearance not.

(3) wiring is complicated, needs a plurality of protection actions to export and connect, and wire jumper is many between the screen cabinet, and construction is complicated.

2, the another kind of mode by mode locking prepared auto restart is to need signals of locking prepared auto restart all to access backup auto-activating device to open into form all, is judged according to opening into situation by backup auto-activating device.This mode major defect:

(1) producer's design is different, is unfavorable for the unified management in the full company scope.

(2) will open into all as basis for estimation, the prepared auto restart action logic need to be write again, and workload is large.Decision logic is too complicated, affects the O﹠M personnel and is familiar with device characteristics.

The program adaptability of (3) solidifying is relatively poor, when running into equipment or operational mode specific (special) requirements being arranged, needs update routine, and practicality is not high.

Summary of the invention

Technical problem to be solved by this invention is; a kind of main logic that can not change original prepared auto restart action is provided; after various protective device actions; can by the logic of the specific prepared auto restart manner of execution of demand locking, can improve the matrix blocking method of the backup auto-activating device of prepared auto restart construction, debugging operating efficiency.

Method of the present invention is:

A. all are needed the amount of prepared auto restart action of locking as opening into the access backup auto-activating device, set one and have i locking and open into the access backup auto-activating device, these intakes are defined as open into matrix K K=[a ₁a ₂A _i];

B. set lock-in control word matrix A,

A in the matrix _IjHave 0 and 1 two kind of value, a _IjWhen representing that i opens into action, whether j kind prepared auto restart manner of execution needs locking; a _IjWhen i of=1 expression opened into action, j kind prepared auto restart manner of execution was blocked; a _IjWhen i of=0 expression opened into action, j kind prepared auto restart manner of execution need not locking;

When c. backup auto-activating device moves, carry out computing to the prepared auto restart action executing according to original logic of prepared auto restart action, if need action, carry out first following determining step: the first step, judge which kind manner of execution is about to action, will move such as k kind prepared auto restart mode, then take out matrix A k row; Second step will be opened in matrix K and the lock-in control word matrix A k column matrix and carry out multiplying, as a result then not locking of D=0, and move with regard to the locking prepared auto restart D ≠ 0.

Method of the present invention has the following advantages:

1, the loop is relatively independent between prepared auto restart and other protections.The external cabling of device is fixed, and can once directly build up.Transformation, enlarging need not the wiring of adjust operation equipment, need not to stop using as a servant operational outfit and debug.

2, since program Solidification in backup auto-activating device, producer can be for device, the Optimization Debugging outline simplify to be checked and accepted step, optimizes acceptance process, the standardization prepared auto restart is checked and accepted, and checks and accepts efficient thereby improve.

3, the backup auto-activating device action logic need not to adjust, only need to be before the prepared auto restart action, and two steps of increase are judged statement, workload is little, easily realizes.

4, the matrix control word can adapt to various backup auto-activating devices according to the manner of execution of existing backup auto-activating device with need the opening into decision of locking prepared auto restart, can satisfy any amount locking open into requirement.Prepared auto restart for various complicated connection types, various motion logic has superiority more.

5, no matter operational mode, standbyly throw logic, locking is opened into how to change, and all need not to change the wiring of operational outfit, need not the operational outfit debugging that has a power failure is improved the equipment reliability of operation.

6, the standby matrix control word implication of throwing is simply clear and definite, during O﹠M personnel Input Control Word, can carry out abundant preview to locking prepared auto restart logic, guarantees that prepared auto restart do not bother to see me out electricity to faulty equipment the time, the operation that automatically recovers normal device as far as possible on a large scale.

7, adapt to the development of Intelligent transformer station, decision logic can be revised at any time as required, and action logic is more intelligent.

Description of drawings

Fig. 1 is the 110kV Substation Bus Arrangement figure of existing employing standard internal bridge.

Embodiment

The inventive method embodiment is controlled to be example with the backup auto-activating device of the 110kV transformer station of employing standard internal bridge:

One, specific prepared auto restart is by the logic analysis of mode block action.

As shown in Figure 1, the 110kV internal bridge can have four kinds of prepared auto restart modes according to its ruuning situation.

1, standby throwing mode 1:1DL, the 3DL operation of inlet wire, a line two becomes operational mode, and the 2DL stand-by heat is as stand-by power supply.

2, standby throwing mode 2:2DL, the 3DL operation of inlet wire, a line two becomes operational mode, and the 1DL stand-by heat is as stand-by power supply.

3, standby throwing mode: 1DL, the 2DL operation of interior bridge, the 3DL stand-by heat, two lines two become operational modes, and two inlet wires are stand-by power supply each other.

Analyze with its relevant protection device action situation and prepared auto restart action logic.

1,1DL, 3DL operation, the 2DL stand-by heat, a line two becomes under the operational mode:

(1) 1B differential protection action, fault coverage be each side current transformer of 1B with interior part, 2B equipment is normal, need not the locking prepared auto restart.

(2) 1B main body protection action, fault coverage is the 1B body, 2B equipment is normal, need not the locking prepared auto restart.

(3) the sleeve pipe rheology of main transformer high-pressure side is normally adopted in the high backup protection of 1B, and fault coverage is the following equipment of 1B high-pressure side sleeve pipe rheology, and 2B equipment is normal, need not the locking prepared auto restart.

2,2DL, 3DL operation, the 1DL stand-by heat, a line two becomes under the operational mode:

The protection of 2B main transformer body, high backup protection need not the locking prepared auto restart with the corresponding fault of 1B.During the action of 2B differential protection, owing to there being the possibility of fault between 3DL switch and its rheology, need to analyze separately.

Permanent fault occurs between 3DL switch and its rheology; the action of 2B differential protection; tripping 2DL, 3DL switch, failure removal is if backup auto-activating device moves at this moment; the 1DL switch closes; to send electricity to the fault point, cause the injury that repeats to equipment, and this fault need to be excised by the upper level route protection; operate time is longer, needs the locking prepared auto restart this moment.

3,1DL, 2DL operation, the 3DL stand-by heat, two lines two become under the operational mode:

Because differential protection, main body protection, high backup protection are moved, and all have the possibility of main transformer fault.Therefore, above-mentioned fault occurs in any main transformer, all must the locking prepared auto restart.

Two, prepared auto restart is by the explanation of mode locking matrix control word

According to above analysis, protective device is moved situation and prepared auto restart manner of execution contacts, merge arrangement after, can set up following logic tabulation:

?	The standby throwing mode 1 of locking inlet wire	The standby throwing mode 2 of locking inlet wire	The standby throwing mode of locking bridge
				The action of 1B differential protection	0	0	1
The action of 1B main body protection	0	0	1

The high backup protection action of 1B	0	0	1
				The action of 2B differential protection	0	1	1
The action of 2B main body protection	0	0	1
				The high backup protection action of 2B	0	0	1

This analysis result form as a matrix, is set it and is locking matrix control word A.Matrix a _IjWhen representing that i opens into action, whether j kind prepared auto restart manner of execution needs locking, and equaling needs locking prepared auto restart action logic under 1 this condition of expression.A corresponding to upper table is

$A=\left[\begin{array}{ccc}0& 0& 1\\ 0& 0& 1\\ 0& 0& 1\\ 0& 1& 1\\ 0& 0& 1\\ 0& 0& 1\end{array}\right]$

After adopting locking matrix control word logic, during the operation of prepared auto restart equipment, carry out computing to the prepared auto restart action executing according to original logic, increase by two step decision logics when needing action.The first step, j kind prepared auto restart mode is moved, and then takes out matrix A j row.For example, 2 chargings of prepared auto restart mode are finished, and when condition suits the requirements action, namely take out the 2nd row among the A.Second step will be opened into matrix and locking matrix and carry out multiplying, and the result is 0 not locking, otherwise moves with regard to the locking prepared auto restart.2DL, 3DL operation, the 1DL stand-by heat, when a line two becomes operational mode, the action of 2B differential protection, at this moment, prepared auto restart satisfies operation condition, enters locking matrix decision logic.The prepared auto restart locking is opened into K=[0 0010 0], total locking judgment value KA is:

$\mathrm{KA}=\left[\begin{array}{cccccc}0& 0& 0& 1& 0& 0\end{array}\right]\left[\begin{array}{c}0\\ 0\\ 0\\ 1\\ 0\\ 0\end{array}\right]=1$

Therefore, locking inlet wire prepared auto restart mode 2.

Claims (1)

1. the matrix blocking method of a backup auto-activating device is characterized in that:

A. all are needed the amount of prepared auto restart action of locking as opening into the access backup auto-activating device, set one and have i locking and open into the access backup auto-activating device, these intakes are defined as open into matrix K K=[a ₁a ₂A _i];

B. set lock-in control word matrix A,

A in the matrix _IjHave 0 and 1 two kind of value, a _IjWhen representing that i opens into action, whether j kind prepared auto restart manner of execution needs locking; a _IjWhen i of=1 expression opened into action, j kind prepared auto restart manner of execution was blocked; a _IjWhen i of=0 expression opened into action, j kind prepared auto restart manner of execution need not locking;

When c. backup auto-activating device moves, carry out computing to the prepared auto restart action executing according to original logic of prepared auto restart action, if need action, carry out first following determining step: the first step, judge which kind manner of execution is about to action, will move such as k kind prepared auto restart mode, then take out matrix A k row; Second step will be opened in matrix K and the lock-in control word matrix A k column matrix and carry out multiplying, as a result then not locking of D=0, and move with regard to the locking prepared auto restart D ≠ 0.

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