CN104167810A - Method for verifying correctness of decoupling operation mode of expanded inner bridging line standby power automatic switching - Google Patents

Abstract

The invention belongs to control technology of an electric power transmission and distribution network, and relates to a method for verifying correctness of decoupling an operation mode of expanded inner bridging line standby power automatic switching. The method is applied to a standby power automatic switching decoupling device of a power substation of which the power transmission and distribution network is at a voltage level of 220 kV or lower than 220 kV and a primary main connecting line is a double-power supply expanded inner bridging line. In a specific method for verifying correctness of decoupling the operation mode of a standby power supply automatic switching device with a double-power supply expanded inner bridging line, a logic algebraic expression of decoupling the operation mode of expanded inner bridging line standby power automatic switching is shown in the description in detail. The advantages of the method for verifying correctness of decoupling the operation mode of expanded inner bridging line standby power automatic switching are reflected in that: 1: using logic algebra for checking calculation of ''decoupling'' of the operation mode of the expanded inner bridging line standby power automatic switching device is simple and clear; and 2. the method of using logic algebra for checking calculation of ''decoupling'' the operation mode of the expanded inner bridging line standby power automatic switching device is convenient to implement and easy to understand.

Description

Decoupling zero expands the verification method of internal bridge prepared auto restart operational mode correctness

Technical field

The invention belongs to the control technology of power transmission and distribution network, relate to the verification method that a kind of decoupling zero expands interior bridge prepared auto restart operational mode correctness.

Background technology

< < Automation of Electric Systems > > magazine the 33rd the 23rd phase of volume one piece of paper in 2009 " expands the prepared auto restart control strategy of internal bridge " based on duplicate supply, the automatic throw-in equipment of emergency power supply (abbreviation prepared auto restart) that proposition expands internal bridge by duplicate supply is simplified to by 2 duplicate supply internal bridge prepared auto restarts and forms (be called for short decoupling zero and expand internal bridge prepared auto restart), but in actual motion, under a certain concrete mode of connection, the correctness of decoupling zero expansion internal bridge prepared auto restart operational mode also needs checking, to guarantee prepared auto restart reliability of operation.

Summary of the invention

Problem to be solved by this invention is to provide the decoupling zero that a kind of prepared auto restart that can be main electrical scheme of 220kV and following electric pressure electric substation expansion internal bridge that is dual power supply for transmission and distribution networks (is called for short " decoupling zero ") and forms after simplifying and expands internal bridge backup auto-activating device, can verify the verification method of its operational mode correctness.

Provide the technical scheme of the inventive method below:

It at the applied transmission and distribution networks of method of the present invention, is the decoupling zero backup auto-activating device of main electrical scheme of 220kV and following electric pressure electric substation expansion internal bridge that is dual power supply.

Main electrical scheme of electric substation at the applied transmission and distribution networks of method of the present invention is that standard expands internal bridge (seeing Fig. 1), include two-way power supply, on two-way power supply, be serially connected with respectively the first circuit breaker Q F1, the second circuit breaker Q F2, the 3rd circuit breaker Q F3 and the 4th circuit breaker Q F4, also connect respectively three main transformers: No. 1 main transformer, No. 2 main transformer and No. 3 main transformer, be two-way electric power incoming line, three step-down main transformers, four circuit breakers, wherein two circuit breakers are electric power incoming line circuit breaker, and another two circuit breakers are bridge circuit breaker; The line side of electric power incoming line and high voltage side of transformer are all connected to voltage transformer; The operational mode of exhaustive expansion internal bridge prepared auto restart has 12 kinds.

Expansion internal bridge is decoupled into by 2 internal bridges and forms: by QF1, QF2, QF4 circuit breaker, form first group of internal bridge; By QF1, QF3, QF4 circuit breaker, form second group of internal bridge;

By the control logic of 2 interior bridge prepared auto restarts, formed the prepared auto restart logic of a complete expansion internal bridge: by QF1, QF2, QF4 circuit breaker, formed the prepared auto restart of the internal bridge of first group of duplicate supply two inlet wire, be defined as prepared auto restart 1; The prepared auto restart that consists of the internal bridge of second group of duplicate supply two inlet wire QF1, QF3, QF4 circuit breaker, is defined as prepared auto restart 2;

The prepared auto restart that expands internal bridge is completed jointly by internal bridge prepared auto restart 1 and internal bridge prepared auto restart 2 these 2 part control logics;

The concrete grammar of the operational mode correctness of the decoupling zero automatic throw-in equipment of emergency power supply of the expansion internal bridge of checking dual power supply is as follows:

A.QF1, QF2, QF3, QF4 circuit breaker represent with A, B, C, D respectively, and A, B, C, D represent that respectively QF1, QF2, QF3, QF4 circuit breaker are running status, by logic algebra, are expressed as 1; With represent that respectively QF1, QF2, QF3, QF4 circuit breaker, for running status not, are hot stand-by duty, by logic algebra, be expressed as 0;

B. the satisfied logic algebra expression formula of internal bridge prepared auto restart 1 operational mode of decoupling zero is (1) formula:

$\mathrm{AB}\stackrel{\&OverBar;}{D}+A\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}---\left(1\right);$

C. the satisfied logic algebra expression formula of interior bridge prepared auto restart 2 operational modes of decoupling zero is (2) formula:

$\mathrm{AC}\stackrel{\&OverBar;}{D}+A\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}---\left(2\right);$

D. decoupling zero expansion internal bridge prepared auto restart operational mode logic algebra expression formula is (3) formula:

$(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})---\left(3\right);$

E. consider that logic algebra formula has with therefore decoupling zero expansion internal bridge prepared auto restart operational mode logic algebra expression formula is transformed to (4) formula:

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})*(C+\stackrel{\&OverBar;}{C})\\ +(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})*(B+\stackrel{\&OverBar;}{B})\end{array}---\left(4\right);$

F. arrange above formula, and consider with these two kinds of operational modes are equivalent to respectively the inactive mode of internal bridge 1 and internal bridge 2, from principle, are also the modes of stopping using, so decoupling zero expands internal bridge prepared auto restart operational mode logic algebra expression formula, are transformed to (5) formula:

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =\mathrm{AB}\stackrel{\&OverBar;}{C}D+\mathrm{ABC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BCD}+A\stackrel{\&OverBar;}{B}C\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\mathrm{CD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D\\ +\mathrm{AB}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}B\stackrel{\&OverBar;}{C}D+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\mathrm{AB}\stackrel{\&OverBar;}{C}D\end{array}---\left(5\right);$

From (5) Shi Ke get, the operational mode that decoupling zero expands internal bridge prepared auto restart is 12 kinds, and then has verified that it is consistent with the operational mode of exhaustive expansion internal bridge prepared auto restart that decoupling zero expands internal bridge prepared auto restart.

Advantage applies of the present invention exists:

1. logic algebra checking computations " decoupling zero " expand interior bridge backup auto-activating device operational mode, simply clear;

2. logic algebra checking computations " decoupling zero " expand the method for interior bridge backup auto-activating device operational mode, and it is convenient to implement, easy to understand.

Accompanying drawing explanation

Main wiring diagram of bridge in Tu1Shi Mou electric substation duplicate supply expands;

Specific embodiments

As shown in Figure 1, the expansion internal bridge of the dual power supply that the main electrical scheme of electric substation in the applied transmission and distribution networks of method of the present invention is standard, include two-way power supply, on two-way power supply, be serially connected with respectively the first circuit breaker Q F1, the second circuit breaker Q F2, the 3rd circuit breaker Q F3 and the 4th circuit breaker Q F4, also connect respectively three main transformers (i.e. No. 1 main transformer, No. 2 main transformers and No. 3 main transformers), the line side of electric power incoming line and high voltage side of transformer or low-pressure side are all connected to voltage transformer.Be two-way electric power incoming line, three step-down main transformers, four circuit breakers:

Provide the embodiment of the inventive method below:

1, expand the operational mode of internal bridge prepared auto restart

Fig. 1 is main electrical scheme of bridge in expanding, and the operational mode that expansion internal bridge prepared auto restart is listed by " method of exhaustion " is as being shown in Table 1, and operational mode has 12 kinds.

Table 1, the possible operational mode of expansion internal bridge prepared auto restart

Note: no matter No. 1, No. 2, No. 3 main transformers of electric substation are operation or inactive, but backup auto-activating device does not move accordingly, is inactive mode

2, expand the simplification of internal bridge prepared auto restart

< < Electric Power Automation Equipment > > " paper " has introduced expansion internal bridge, and can to simplify (being also referred to as " decoupling zero ") be 2 internal bridges, that is:

(1) by QF1, QF2, QF4 circuit breaker, form first group of internal bridge (see Fig. 1, QF3 thinks in running status);

(2) by QF1, QF3, QF4 circuit breaker, form second group of internal bridge (see Fig. 1, QF2 thinks in running status).

Can be formed by the control logic of 2 interior bridge prepared auto restarts the prepared auto restart control logic of a complete expansion internal bridge equally:

(1) by QF1, QF2, QF4 circuit breaker, formed the prepared auto restart (hereinafter to be referred as prepared auto restart 1) of the internal bridge of first group of duplicate supply two inlet wire;

(2) by QF1, QF3, QF4 circuit breaker, formed the prepared auto restart (hereinafter to be referred as prepared auto restart 2) of the internal bridge of second group of duplicate supply two inlet wire.

Therefore, the prepared auto restart of expansion internal bridge is completed jointly by internal bridge prepared auto restart 1 and internal bridge prepared auto restart 2 these 2 part control logics.

3, the mathematical proof of " decoupling zero " expansion internal bridge prepared auto restart

Expand internal bridge prepared auto restart whether can " decoupling zero " for to be formed by 2 internal bridge prepared auto restarts, we can prove that by the method for logic algebra whether this method for simplifying correct.QF1, QF2, QF3, QF4 circuit breaker represent with A, B, C, D respectively, and A, B, C, D represent that QF1, QF2, QF3, QF4 circuit breaker are respectively running status, are expressed as 1 by logic algebra; represent that QF1, QF2, QF3, QF4 circuit breaker are respectively not running status, hot stand-by duty, is expressed as 0 by logic algebra.

3.1 interior bridge prepared auto restarts 1 and interior bridge prepared auto restart 2 logic algebra expression formulas

In 1, main electrical scheme of internal bridge of Fig. 1 " decoupling zero " operation of QF1, QF2, QF4 circuit breaker with do not move, formed internal bridge prepared auto restart 1 totally 6 kinds of operational modes, one of them is for stopping using mode:

(1) operating circuit breaker QF1, QF4; The standby circuit breaker Q F2 that throws; When inlet wire 1 loses power supply, tripping QF1 circuit breaker, QF2 circuit breaker in throwing; When inlet wire 2 loses power supply, tripping QF4 circuit breaker, QF2 circuit breaker in throwing.Its logic algebra expression formula is:

(2) operating circuit breaker QF1, QF2; The standby circuit breaker Q F4 that throws; When inlet wire 1 loses power supply, tripping QF1 circuit breaker, QF4 circuit breaker in throwing.Its logic algebra expression formula is:

(3) operating circuit breaker QF2, QF4; The standby circuit breaker Q F1 that throws; When inlet wire 2 loses power supply, tripping QF4 circuit breaker, QF1 circuit breaker in throwing.Its logic algebra expression formula is:

(4) operating circuit breaker QF1; Standby circuit breaker Q F2, the QF4 of throwing; When inlet wire 1 loses power supply, tripping QF1 circuit breaker, QF4, QF2 circuit breaker in throwing.Its logic algebra expression formula is:

(5) operating circuit breaker QF4; Standby circuit breaker Q F1, the QF2 of throwing; When inlet wire 2 loses power supply, tripping QF4 circuit breaker, QF1, QF2 circuit breaker in throwing.Its logic algebra expression formula is:

(6) no matter No. 1, No. 3 main transformers of electric substation are operation or inactive, but backup auto-activating device does not move accordingly, is inactive mode.Its logic algebra expression formula is:

Obtaining thus the satisfied logic algebra expression formula of interior bridge prepared auto restart operational mode is formula (6):

$A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}---\left(6\right)$

In like manner, can obtain interior bridge prepared auto restart 2 logic algebra expression formulas is formula (7):

$A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}---\left(7\right)$

3.2 logic algebras that expand internal bridge prepared auto restart prove

Interior bridge prepared auto restart 1 is in operation and need to cooperates each other with interior bridge prepared auto restart 2, just can complete the logic that expands internal bridge prepared auto restart.Some operational mode that expands the logic of internal bridge prepared auto restart can be completed by interior bridge prepared auto restart 1, also can be completed by interior bridge prepared auto restart 2, and even some operational mode must be completed with interior bridge prepared auto restart 2 jointly by interior bridge prepared auto restart 1; Therefore, interior bridge prepared auto restart 1 should be the relation of "or" with interior bridge prepared auto restart 2 in logical relation, and therefore having " decoupling zero " to expand internal bridge prepared auto restart operational mode logic algebra expression formula is formula (8):

$(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})---\left(8\right)$

Consider that logic algebra formula has with therefore having " decoupling zero " to expand internal bridge prepared auto restart operational mode logic algebra expression formula becomes as formula (9):

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})*(C+\stackrel{\&OverBar;}{C})\\ +(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})*(B+\stackrel{\&OverBar;}{B})\end{array}---\left(9\right)$

(9) formula of arrangement, obtains " decoupling zero " expansion internal bridge prepared auto restart operational mode logic algebra expression formula and becomes as formula (10):

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =A\stackrel{\&OverBar;}{\mathrm{BC}}D+\mathrm{ABC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BCD}+A\stackrel{\&OverBar;}{B}C\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\mathrm{CD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D\\ +\mathrm{AB}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}B\stackrel{\&OverBar;}{C}D+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\mathrm{AB}\stackrel{\&OverBar;}{C}D\end{array}---\left(10\right)$

By (10) formula, expand on internal bridge prepared auto restart surface and have 14 kinds of operational modes, but with these two kinds of operational modes are equivalent to respectively the inactive mode of internal bridge 1 and internal bridge 2, from principle, are also the modes of stopping using, so expand the operational mode of internal bridge prepared auto restart, have in theory 12 kinds, and wherein a kind of is the mode of stopping using.Therefore, " decoupling zero " expansion internal bridge prepared auto restart operational mode logic algebra expression formula becomes (11) formula:

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =A\stackrel{\&OverBar;}{\mathrm{BC}}D+\mathrm{ABC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BCD}+A\stackrel{\&OverBar;}{B}C\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\mathrm{CD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D\\ +\mathrm{AB}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}B\stackrel{\&OverBar;}{C}D+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\mathrm{AB}\stackrel{\&OverBar;}{C}D\end{array}---\left(11\right)$

Wherein with these two kinds of operational mode < < Automation of Electric Systems > > " paper " do not enumerate, but in actual motion, be also to exist, such as, when QF2HuoQF3 electric substation is newly-built, do not consider that building this equipment when newly-built (is now equivalent to this circuit breaker unanimously in run location, this expansion internal bridge is now equivalent to internal bridge with these two kinds of operational modes are equivalent to internal bridge 1 prepared auto restart and one of them operational mode of internal bridge 2 prepared auto restarts), when Huo electric substation newly above expands internal bridge prepared auto restart, due to newly-built 2 transformers only, generally can, by QF2 or QF3 circuit breaker about amount is set to run location always, expansion internal bridge prepared auto restart be converted into internal bridge prepared auto restart; Therefore, with these 2 kinds of operational modes can seldom occur when the actual motion of perfect expansion internal bridge.

From above-mentioned analysis, logic algebra proves that the operational mode of " decoupling zero " expansion internal bridge prepared auto restart is also 12 kinds, thereby has proved that the operational mode of " decoupling zero " expansion internal bridge prepared auto restart is consistent with the operational mode of the expansion internal bridge prepared auto restart of " exhaustive ".

Claims (1)

1. decoupling zero expands a verification method for interior bridge prepared auto restart operational mode correctness, it is characterized in that:

It at the applied transmission and distribution networks of method of the present invention, is the decoupling zero backup auto-activating device of main electrical scheme of 220kV and following electric pressure electric substation expansion internal bridge that is dual power supply;

It in main electrical scheme of electric substation of the applied transmission and distribution networks of method of the present invention, is standard expansion internal bridge, include two-way power supply, on two-way power supply, be serially connected with respectively the first circuit breaker Q F1, the second circuit breaker Q F2, the 3rd circuit breaker Q F3 and the 4th circuit breaker Q F4, also connect respectively three main transformers: No. 1 main transformer, No. 2 main transformer and No. 3 main transformer, be two-way electric power incoming line, three step-down main transformers, four circuit breakers, wherein two circuit breakers are electric power incoming line circuit breaker, and another two circuit breakers are bridge circuit breaker; The line side of electric power incoming line and high voltage side of transformer are all connected to voltage transformer;

Expansion internal bridge is decoupled into by 2 internal bridges and forms: by QF1, QF2, QF4 circuit breaker, form first group of internal bridge; By QF1, QF3, QF4 circuit breaker, form second group of internal bridge;

By the control logic of 2 interior bridge prepared auto restarts, formed the prepared auto restart logic of a complete expansion internal bridge: by QF1, QF2, QF4 circuit breaker, formed the prepared auto restart of the internal bridge of first group of duplicate supply two inlet wire, be defined as prepared auto restart 1; The prepared auto restart that consists of the internal bridge of second group of duplicate supply two inlet wire QF1, QF3, QF4 circuit breaker, is defined as prepared auto restart 2;

The prepared auto restart that expands internal bridge is completed jointly by internal bridge prepared auto restart 1 and internal bridge prepared auto restart 2 these 2 part control logics;

The concrete grammar of the operational mode correctness of " decoupling zero " automatic throw-in equipment of emergency power supply of the expansion internal bridge of checking dual power supply is as follows:

A.QF1, QF2, QF3, QF4 circuit breaker represent with A, B, C, D respectively, and A, B, C, D represent that respectively QF1, QF2, QF3, QF4 circuit breaker are running status, by logic algebra, are expressed as 1; With represent that respectively QF1, QF2, QF3, QF4 circuit breaker, for running status not, are hot stand-by duty, by logic algebra, be expressed as 0;

B. the satisfied logic algebra expression formula of internal bridge prepared auto restart 1 operational mode of decoupling zero is (1) formula:

$\mathrm{AB}\stackrel{\&OverBar;}{D}+A\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}---\left(1\right);$

C. the satisfied logic algebra expression formula of interior bridge prepared auto restart 2 operational modes of decoupling zero is (2) formula:

$\mathrm{AC}\stackrel{\&OverBar;}{D}+A\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}---\left(2\right);$

D. decoupling zero expansion internal bridge prepared auto restart operational mode logic algebra expression formula is (3) formula:

$(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})---\left(3\right);$

E. consider that logic algebra formula has with therefore decoupling zero expansion internal bridge prepared auto restart operational mode logic algebra expression formula is transformed to (4) formula:

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})*(C+\stackrel{\&OverBar;}{C})\\ +(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})*(B+\stackrel{\&OverBar;}{B})\end{array}---\left(4\right);$

F. arrange above formula, and consider with these two kinds of operational modes are equivalent to respectively the inactive mode of internal bridge 1 and internal bridge 2, from principle, are also the modes of stopping using, so decoupling zero expands internal bridge prepared auto restart operational mode logic algebra expression formula, are transformed to (5) formula:

$\begin{array}{c}(A\stackrel{\&OverBar;}{B}D+\mathrm{AB}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{D})+(A\stackrel{\&OverBar;}{C}D+\mathrm{AC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{CD}+A\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D})\\ =A\stackrel{\&OverBar;}{\mathrm{BC}}D+\mathrm{ABC}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\mathrm{BCD}+A\stackrel{\&OverBar;}{B}C\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\mathrm{CD}+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D\\ +\mathrm{AB}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}B\stackrel{\&OverBar;}{C}D+A\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}D+\stackrel{\&OverBar;}{A}\stackrel{\&OverBar;}{B}\stackrel{\&OverBar;}{C}\stackrel{\&OverBar;}{D}+\mathrm{AB}\stackrel{\&OverBar;}{C}D\end{array}---\left(5\right);$

From (5) Shi Ke get, the operational mode that decoupling zero expands internal bridge prepared auto restart is 12 kinds, verifies that whether it is consistent with the operational mode of exhaustive expansion internal bridge prepared auto restart.