CN105098785A - Method for identifying whether gears of parallel main transformers of AVC system are consistent - Google Patents

Abstract

The invention discloses a method for identifying whether the gears of parallel main transformers of an AVC system are consistent, comprising the following steps: reactive power of two main transformers running in parallel is sampled and analyzed multiple times, the reactive power ratio of the two main transformers is calculated, and abnormal values are eliminated; whether impedance parameters are filled in correctly is inspected; once that the voltage is abnormal is detected, the AVC system sends a voltage regulation command to the two main transformers running in parallel, and records the reactive power of the two main transformers; whether there is change in gear is judged, and that the gears of the two parallel main transformers are consistent is determined if there is change in gear; or a composite criterion is implemented further, and whether there is change in field gear is judged based on time; if that there is change in field gear is decided according to the composite criterion, that the gear adjustment succeeds is determined, namely, the gears of the two parallel main transformers are consistent, and a voltage regulation command is no longer sent, or there is a need to continue sending a voltage regulation command. The problem that whether gear adjustment succeeds or not is judged only based on a single criterion and is not reliable in the voltage regulation process of AVC is solved effectively.

Description

The discrimination method that whether consistent AVC system main shift arranged side by side is

Technical field

The present invention relates to the discrimination method that whether consistent a kind of AVC system main shift arranged side by side is, belong to technical field of power system operation control.

Background technology

In AVC (AutomaticVoltageControl, automatism voltage control) system, transformer is the capital equipment of regulation voltage.For the consideration of reliability and economy, two transformers run mainly with juxtaposition.AVC system is once detect that voltage is defective, will pressure regulation order be sent out to the transformer of paired running simultaneously, once the tap change telemetry intelligence (TELINT) of transformer returns to AVC system, then can confirm this pressure regulation event success, otherwise, continuation is sent out pressure regulation order to the transformer of paired running by AVC system, until AVC is delivered in regulation stall change remote measurement.

But when some automatic channel, front end processor situation are bad, after AVC system sends pressure regulation order to parallel transformer, the change information of gear can not in time on give, such as there is A, the transformer of B two paired runnings, after AVC sends out pressure regulation order to these two transformers, wherein transformer A transfers the files successfully, the change information of its gear also can be sent to main website end timely, and transformer B may slow in one's movements due to primary equipment, tunnel condition is bad or the reason such as load tap changer tripping, the change information of gear in for a long time cannot on give.So AVC system will think that transformer B transfers the files unsuccessful in this event of transferring the files, in order to avoid the harm that circulating power brings to transformer, AVC can continue to repeat to send out last pressure regulation order to the transformer B of failure of transferring the files, make B action again, so repeatedly regulate, until action frequency is finished.

The pattern again sending pressure regulation order is ensure main transformer paired running reliable, effective for the situation of load tap changer tripping.But when primary equipment is slow in one's movements, tunnel condition is bad time, this method is but incorrect.In fact, when primary equipment is slow in one's movements, time tunnel condition is bad, the gear of transformer B changes, A, B has been in the consistent running status of gear, only gear change information delay delivers to AVC system, if AVC system only sends out pressure regulation order according to gear change information as successfully foundation of transferring the files again, by causing, the transformer gear of two paired runnings is inconsistent, if be in this state for a long time, the operation of the system of giving and fail safe are brought great hidden danger, also be easy to the fault causing on-load voltage regulating switch simultaneously, reduce transformer life.

Paired running transformer whether transfer the files successfully with and paired running transformer transfer the files after the conforming judgement of gear be inherently a problem, from the above analysis, the transfer the files method of success or not of traditional judgement is defective, needs to propose new criterion and comes.

Summary of the invention

The object of the invention is to overcome deficiency of the prior art, the discrimination method that whether consistent a kind of AVC system main shift arranged side by side is is provided, in solution prior art, two wrong shelves of transformer run and bring very big hidden danger large to system, also easily cause the fault of voltage adjustment of on-load switch simultaneously, reduce the technical problem of transformer life.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the discrimination method that whether consistent AVC system main shift arranged side by side is, comprises the steps:

Step one: carry out multiple repairing weld analysis to the idle of two paired running main transformers, calculates the idle ratio of two main transformers, and rejecting abnormalities value; By the idle ratio of two main transformers compared with the impedance inverse ratio of two main transformers, whether fill in correctly to check impedance parameter;

Step 2: once detect that voltage is abnormal, AVC sends pressure regulation order to two of paired running main transformers:

For two winding main transformers, AVC, to before main transformer pressure regulation, records the idle situation of two main transformers;

For three winding main transformer, AVC to before main transformer pressure regulation, record main transformer low-pressure side respectively according to the difference of operational mode or medium voltage side idle;

Step 3: judge whether gear changes, if had, then represent that this transfers the files successfully, namely two main shifts arranged side by side are consistent; Otherwise, perform compound criterion further, and binding time judges whether on-the-spot gear changes;

Step 4: change if go out on-the-spot gear by compound Criteria Decision, then show that this transfers the files successfully, and namely two main shifts arranged side by side are consistent, no longer send pressure regulation order, otherwise, need to continue to send out pressure regulation order.

Further, the concrete steps of step one are as follows:

Step 101): for main transformer A and the main transformer B of two paired runnings, put into operation the starting stage in AVC system, record the idle Q of m time of two main transformer the same sides respectively _a1, Q _a2..., Q _am, Q _b1, Q _b2..., Q _bm, calculate respectively ratio R _n, wherein n=1,2 ..., m, and R _naverage E (R) and variance V (R), remove exceptional value [E (R)-3*V (R), E (R)+3*V (R)] R outward _n, and then computation of mean values E (R) ';

Step 102): the impedance obtaining two main transformers from SCADA database, calculates the impedance inverse ratio of two main transformers

Step 103): a given threshold epsilon ₁, compare E (R) ' with might as well establish if then think that the impedance parameter of SCADA database is correct, record otherwise idle m time of real time record two main transformers, calculate average, after rejecting abnormalities value, retain this mean value in real time $E\left(\frac{Q_{An}}{Q_{Bn}}\right).$

Preferably, when carrying out idle collection to two main transformers, select the idle of the low-pressure side in not same date different moment, number of times m is greater than 30 times.

Further, the concrete steps of step 2 are as follows:

Step 201): once detect that voltage is abnormal, AVC sends pressure regulation order to respectively main transformer A, main transformer B, and records the idle Q before two main transformer pressure regulation _a0and Q _b0;

Step 202): the gear k obtaining two main transformers in real time from SCADA _a, k _b, idle Q _a, Q _b, and record two main transformers and whether be still in paired running;

Step 203): if k _a=k _b, represent and gear send successfully, then think that pressure regulation is successful, otherwise, represent and gear send failure.

Further, for two two winding main transformers, if Q _a>=Q _b, | Q _a-Q _a0|>=| Q _b-Q _b0|, described in step 3, compound criterion is as follows:

Criterion 1: given threshold epsilon ₂, ε ₃, when impedance parameter is correct, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)\frac{X_B}{X_A}\end{array}\right.$ Whether set up; When impedance parameter is filled in wrong, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)E\left(\frac{Q_A}{Q_B}\right)\end{array}\right.$ Whether set up;

Criterion 2: given threshold epsilon ₄, judge whether set up;

Criterion 3: given threshold epsilon ₅, Bu Fangshe $(n^{Q_A}+n^{Q_B})\&GreaterEqual;(n^{Q_{A0}}+n^{Q_{B0}}),$ Judge $1\&le;\frac{n^{Q_A}+n^{Q_B}}{n^{Q_{A0}}+n^{Q_{B0}}}\&le;\left(1+{\mathrm{\&epsiv;}}_5\right)$ Whether set up;

Wherein: Q _a0and Q _b0idle for front two main transformers of pressure regulation, Q _a, Q _bfor two main transformers idle of Real-time Obtaining, n is integer, n ∈ [2,6];

For two three winding main transformers, be divided into medium voltage side side by side/the equal paired running of low-pressure side split operation, medium voltage side and low-pressure side two kinds of operational modes:

When adopt medium voltage side side by side/low-pressure side split operation mode time, if Q _a1>=Q _b1, | Q _a1-Q _a10|>=| Q _b1-Q _b10| described in step 3, compound criterion is as follows:

Criterion 1: given threshold epsilon ₆, judge whether set up;

Criterion 2: given threshold epsilon ₇, judge whether set up;

Criterion 3: given threshold epsilon ₇, ε ₈, Bu Fangshe $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_7\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_8\right)\end{array}\right.$ Whether set up;

Wherein: Q _a10, Q _b10idle for front two the main transformer medium voltage sides of pressure regulation; Q _a1, Q _b1for two main transformer medium voltage sides idle of Real-time Obtaining;

When adopting medium voltage side and the equal paired running mode of low-pressure side, if Q _a1>=Q _b1, Q _a2>=Q _b2, | Q _a1-Q _a10|>=| Q _b1-Q _b10|, | Q _a2-Q _a20|>=| Q _b2-Q _b20|, described in step 3, compound criterion is as follows:

Criterion 1: given threshold epsilon ₉, ε ₁₀, judge $\left\{\begin{array}{c}1\&le;\frac{Q_{A1}}{Q_{B1}}\&le;(1+{\mathrm{\&epsiv;}}_9)\frac{Q_{A10}}{Q_{A10}}\\ 1<\frac{Q_{A2}}{Q_{B2}}\&le;(1+{\mathrm{\&epsiv;}}_{10})\frac{Q_{A20}}{Q_{B20}}\end{array}\right.$ Whether set up;

Criterion 2: given threshold epsilon ₁₁, ε ₁₂, judge $\left\{\begin{array}{c}\left|\frac{Q_{A1}-Q_{A10}}{Q_{B1}-Q_{B10}}\right|<(1+{\mathrm{\&epsiv;}}_{11})\\ \frac{|Q_{A2}-Q_{A20}|}{|Q_{B2}-Q_{B20}|}\&le;(1+{\mathrm{\&epsiv;}}_{12})\end{array}\right.$ Whether set up;

Criterion 3: given threshold epsilon ₁₃, ε ₁₄, Bu Fangshe $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{13}\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{14}\right)\end{array}\right.$ Whether set up;

Wherein: Q _a20, Q _b20idle for front two the main transformer low-pressure sides of pressure regulation; Q _a2, Q _b2for two main transformer low-pressure sides idle of Real-time Obtaining;

Send out in the s second after pressure regulation order to parallel transformer from AVC, if three compound criterions meet all simultaneously, then can think that transformer is transferred the files successfully above, but gear telemetry intelligence (TELINT) in time on give; If s did not all meet after second in these three criterions, then two transformer mistake gears are described, there is circulation, can be judged as transferring the files unsuccessfully, the span of s is: 180 ~ 360 seconds.

Compared with prior art, the beneficial effect that the present invention reaches is: utilize the transformer of paired running transfer the files before and after idlely judge whether to exist circulation and then obtain the whether consistent information of gear, introduce the idle measurement of redundancy in transformer station, by the compound criterion of idle/impedance, even if when guaranteeing to send on gear is not timely, AVC system also can analyze be because gear change information in time on to return be load tap changer tripping, and then send out make correct decision-making, AVC can be strengthened to transfer the files the correctness of decision logic, thus the mistake avoiding transformer to cause because of toning gear runs,

This method mathematical derivation is strict, algorithm there is clear and definite physical significance, effectively solve in AVC pressure regulation process the single insecure defect of successful basis for estimation of transferring the files;

The present invention is not only applicable to two-winding transformer, also can make correct judgement reliably for the three-winding transformer of different running method (medium voltage side side by side, low-pressure side division/medium voltage side is arranged side by side, low-pressure side is arranged side by side).

Embodiment

The present invention proposes to utilize the idle measurement/impedance of redundancy to judge that the conforming method of transformer gear is based on SCADA (SupervisoryControlAndDataAcquisition, data acquisition and supervisor control) system, basic premise gathers idle and information that is gear second every T.Core concept of the present invention be utilize the transformer of paired running transfer the files before and after idlely judge whether to exist circulation and then obtain the whether consistent information of gear.

The invention will be further described below, and following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.

The discrimination method that whether consistent AVC system main shift arranged side by side is, comprises the steps:

Step one: carry out multiple repairing weld analysis to the idle of two paired running main transformers, calculates the idle ratio of two main transformers, and rejecting abnormalities value; By the idle ratio of two main transformers compared with the impedance inverse ratio of two main transformers, whether fill in correctly to check impedance parameter.Concrete steps are as follows:

Step 101): for main transformer A and the main transformer B of two paired runnings, put into operation the starting stage in AVC system, record the idle Q of m time of two main transformer the same sides respectively _a1, Q _a2..., Q _am, Q _b1, Q _b2..., Q _bm, calculate respectively ratio R _n, and R _naverage E (R) and variance V (R), remove exceptional value [E (R)-3*V (R), E (R)+3*V (R)] R outward _n, and then computation of mean values E (R) '; Wherein n=1,2 ..., m, number of times m is greater than 30 times.When idle collection is carried out to two main transformers, select the idle of the low-pressure side in not same date different moment.

Step 102): the impedance obtaining two main transformers from SCADA database, calculates the impedance inverse ratio of two main transformers

Step 103): a given threshold epsilon ₁, compare E (R) ' with might as well establish if then think that the impedance parameter of SCADA database is correct, record otherwise idle m time of real time record two main transformers, calculate average, after rejecting abnormalities value, retain this mean value in real time $E\left(\frac{Q_{An}}{Q_{Bn}}\right).$

Step 2: for two winding main transformers: once detect that voltage is abnormal, AVC sends pressure regulation order to two of paired running main transformers, records the idle Q before two main transformer pressure regulation _a0and Q _b0; The gear k of two main transformers is obtained in real time from SCADA _a, k _b, idle Q _a, Q _b, and record two main transformers and whether be still in paired running; If k _a=k _b, represent and gear send successfully, then think that pressure regulation is successful, otherwise, represent and gear send failure.

For three winding main transformer: once detect that voltage is abnormal, AVC sends pressure regulation orders to two of paired running main transformers, record main transformer low-pressure side respectively according to the difference of operational mode or medium voltage side idle, be specially:

When two three winding main transformers adopt medium voltage sides side by side/low-pressure side split operation mode time, after AVC sends pressure regulation order to main transformer arranged side by side, the gear k of Real-time Obtaining two main transformers _a, k _b, medium voltage side is idle Q _a1, Q _b1, might as well Q be established _a1>=Q _b1, | Q _a1-Q _a10|>=| Q _b1-Q _b10|.If k _a=k _b, be considered as gear successfully on give, then think pressure regulation success, otherwise, enter step 3 and perform compound criterion;

When two three winding main transformer medium voltage sides, low-pressure side all adopt paired running mode, after AVC sends pressure regulation order to main transformer arranged side by side, the gear k of Real-time Obtaining two transformers _a, k _b, medium voltage side is idle Q _a1, Q _b1, low-pressure side is idle Q _a2, Q _b2, and check whether two transformers are in paired running.If k _a=k _b, be considered as gear successfully on give, then think pressure regulation success, otherwise, enter step 3 and perform compound criterion.

Step 3: judge whether gear changes, if had, then represent that this transfers the files successfully, namely two main shifts arranged side by side are consistent; Otherwise, perform compound criterion further, and binding time judges whether on-the-spot gear changes.

For two two winding main transformers, if Q _a>=Q _b, | Q _a-Q _a0|>=| Q _b-Q _b0|, compound criterion is as follows:

Criterion 1: given threshold epsilon ₂, ε ₃, when impedance parameter is correct, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)\frac{X_B}{X_A}\end{array}\right.$ Whether set up; When impedance parameter is filled in wrong, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)E\left(\frac{Q_A}{Q_B}\right)\end{array}\right.$ Whether set up;

Criterion 2: given threshold epsilon ₄, judge whether set up;

Criterion 3: given threshold epsilon ₅, Bu Fangshe $(n^{Q_A}+n^{Q_B})\&GreaterEqual;n^{Q_{A0}}+n^{Q_{B0}},$ Judge $1\&le;\frac{n^{Q_A}+n^{Q_B}}{n^{Q_{A0}}+n^{Q_{B0}}}\&le;(1+{\mathrm{\&epsiv;}}_5)$ Whether set up;

Wherein: Q _a0and Q _b0idle for front two main transformers of pressure regulation, Q _a, Q _bfor two main transformers idle of Real-time Obtaining, n is integer, n ∈ [2,6].

For two three winding main transformers, have medium voltage side side by side/low-pressure side split operation mode and medium voltage side, the equal paired running mode of low-pressure side, respectively the compound criterion of two kinds of operational modes is described in detail below:

When adopt medium voltage side side by side/low-pressure side split operation mode time, if Q _a1>=Q _b1, | Q _a1-Q _a10|>=| Q _b1-Q _b10| described in step 3, compound criterion is as follows:

Criterion 1: given threshold epsilon ₆, judge whether set up;

Criterion 2: given threshold epsilon ₇, judge whether set up;

Criterion 3: given threshold epsilon ₇, ε ₈, Bu Fangshe $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_7\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_8\right)\end{array}\right.$ Whether set up;

Wherein: Q _a10, Q _b10idle for front two the main transformer medium voltage sides of pressure regulation; Q _a1, Q _b1for two main transformer medium voltage sides idle of Real-time Obtaining.

When adopting medium voltage side and the equal paired running mode of low-pressure side, if Q _a1>=Q _b1, Q _a2>=Q _b2, | Q _a1-Q _a10|>=| Q _b1-Q _b10|, | Q _a2-Q _a20|>=| Q _b2-Q _b20|, described in step 3, compound criterion is as follows:

Criterion 1: given threshold epsilon ₉, ε ₁₀, judge $\left\{\begin{array}{c}1\&le;\frac{Q_{A1}}{Q_{B1}}\&le;(1+{\mathrm{\&epsiv;}}_9)\frac{Q_{A10}}{Q_{A10}}\\ 1<\frac{Q_{A2}}{Q_{B2}}\&le;(1+{\mathrm{\&epsiv;}}_{10})\frac{Q_{A20}}{Q_{B20}}\end{array}\right.$ Whether set up;

Criterion 2: given threshold epsilon ₁₁, ε ₁₂, judge $\left\{\begin{array}{c}\left|\frac{Q_{A1}-Q_{A10}}{Q_{B1}-Q_{B10}}\right|<(1+{\mathrm{\&epsiv;}}_{11})\\ \frac{|Q_{A2}-Q_{A20}|}{|Q_{B2}-Q_{B20}|}\&le;(1+{\mathrm{\&epsiv;}}_{12})\end{array}\right.$ Whether set up;

Criterion 3: given threshold epsilon ₁₃, ε ₁₄, Bu Fangshe $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{13}\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{14}\right)\end{array}\right.$ Whether set up;

Wherein: Q _a20, Q _b20idle for front two the main transformer low-pressure sides of pressure regulation; Q _a2, Q _b2for two main transformer low-pressure sides idle of Real-time Obtaining;

Send out in the s second after pressure regulation order to parallel transformer from AVC, if three compound criterions meet all simultaneously, then can think that transformer is transferred the files successfully above, but gear telemetry intelligence (TELINT) in time on give; If s did not all meet after second in these three criterions, then two transformer mistake gears are described, there is circulation, can be judged as transferring the files unsuccessfully, the span of s is: 180 ~ 360 seconds, preferably 240 seconds.

Step 4: change if go out on-the-spot gear by compound Criteria Decision, then show that this transfers the files successfully, and namely two main shifts arranged side by side are consistent, no longer send pressure regulation order, otherwise, need to continue to send out pressure regulation order.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (5)

1. The discrimination method that whether consistent 1.AVC system main shift arranged side by side is, is characterized in that, comprise the steps:

   Step one: carry out multiple repairing weld analysis to the idle of two paired running main transformers, calculates the idle ratio of two main transformers, and rejecting abnormalities value; By the idle ratio of two main transformers compared with the impedance inverse ratio of two main transformers, whether fill in correctly to check impedance parameter;

   Step 2: once detect that voltage is abnormal, AVC sends pressure regulation order to two of paired running main transformers:

   For two winding main transformers, AVC, to before main transformer pressure regulation, records the idle situation of two main transformers;

   For three winding main transformer, AVC to before main transformer pressure regulation, record main transformer low-pressure side respectively according to the difference of operational mode or medium voltage side idle;

   Step 3: judge whether gear changes, if had, then represent that this transfers the files successfully, namely two main shifts arranged side by side are consistent; Otherwise, perform compound criterion further, and binding time judges whether on-the-spot gear changes;

   Step 4: change if go out on-the-spot gear by compound Criteria Decision, then show that this transfers the files successfully, and namely two main shifts arranged side by side are consistent, no longer send pressure regulation order, otherwise, need to continue to send out pressure regulation order.
2. 2. the discrimination method that whether consistent AVC system according to claim 1 main shift arranged side by side is, it is characterized in that, the concrete steps of step one are as follows:

   Step 101): for main transformer A and the main transformer B of two paired runnings, put into operation the starting stage in AVC system, record the idle Q of m time of two main transformer the same sides respectively _a1, Q _a2..., Q _am, Q _b1, Q _b2..., Q _bm, calculate respectively ratio R _n, wherein n=1,2 ..., m, and R _naverage E (R) and variance V (R), remove exceptional value [E (R)-3*V (R), E (R)+3*V (R)] R outward _n, and then computation of mean values E (R) ';

   Step 102): the impedance obtaining two main transformers from SCADA database, calculates the impedance inverse ratio of two main transformers

   Step 103): a given threshold epsilon ₁, compare E (R) ' with might as well establish if then think that the impedance parameter of SCADA database is correct, record otherwise idle m time of real time record two main transformers, calculate average, after rejecting abnormalities value, retain this mean value in real time
3. 3. the discrimination method that whether consistent AVC system according to claim 2 main shift arranged side by side is, is characterized in that, when carrying out idle collection to two main transformers, select the idle of the low-pressure side in not same date different moment, number of times m is greater than 30 times.
4. 4. the discrimination method that whether consistent AVC system according to claim 1 main shift arranged side by side is, it is characterized in that, the concrete steps of step 2 are as follows:

   Step 201): once detect that voltage is abnormal, AVC sends pressure regulation order to respectively main transformer A, main transformer B, and records the idle Q before two main transformer pressure regulation _a0and Q _b0;

   Step 202): the gear k obtaining two main transformers in real time from SCADA _a, k _b, idle Q _a, Q _b, and record two main transformers and whether be still in paired running;

   Step 203): if k _a=k _b, represent and gear send successfully, then think that pressure regulation is successful, otherwise, represent and gear send failure.
5. 5. the discrimination method that whether consistent AVC system according to claim 1 main shift arranged side by side is, is characterized in that,

   For two two winding main transformers, if Q _a>=Q _b, | Q _a-Q _a0|>=| Q _b-Q _b0|, described in step 3, compound criterion is as follows:

   Criterion 1: given threshold epsilon ₂, ε ₃, when impedance parameter is correct, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)\frac{X_B}{X_A}\end{array}\right.$ Whether set up; When impedance parameter is filled in wrong, judge $\left\{\begin{array}{c}1\&le;\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_2)\frac{Q_{A0}}{Q_{A0}}\\ 1<\frac{Q_A}{Q_B}\&le;(1+{\mathrm{\&epsiv;}}_3)E\left(\frac{Q_A}{Q_B}\right)\end{array}\right.$ Whether set up;

   Criterion 2: given threshold epsilon ₄, judge whether set up;

   Criterion 3: given threshold epsilon ₅, Bu Fangshe $(n^{Q_A}+n^{Q_B})\&GreaterEqual;(n^{Q_{A0}}+n^{Q_{B0}}),$ Judge $1\&le;\frac{n^{Q_A}+n^{Q_B}}{n^{Q_{A0}}+n^{Q_{B0}}}\&le;(1+{\mathrm{\&epsiv;}}_5)$ Whether set up;

   Wherein: Q _a0and Q _b0idle for front two main transformers of pressure regulation, Q _a, Q _bfor two main transformers idle of Real-time Obtaining, n is integer, n ∈ [2,6];

   For two three winding main transformers, be divided into medium voltage side side by side/the equal paired running of low-pressure side split operation, medium voltage side and low-pressure side two kinds of operational modes:

   When adopt medium voltage side side by side/low-pressure side split operation mode time, if Q _a1>=Q _b1, | Q _a1-Q _a10|>=| Q _b1-Q _b10| described in step 3, compound criterion is as follows:

   Criterion 1: given threshold epsilon ₆, judge whether set up;

   Criterion 2: given threshold epsilon ₇, judge whether set up;

   Criterion 3: given threshold epsilon ₇, ε ₈, Bu Fangshe

   $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_7\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_8\right)\end{array}\right.$ Whether set up;

   Wherein: Q _a10, Q _b10idle for front two the main transformer medium voltage sides of pressure regulation; Q _a1, Q _b1for two main transformer medium voltage sides idle of Real-time Obtaining;

   When adopting medium voltage side and the equal paired running mode of low-pressure side, if Q _a1>=Q _b1, Q _a2>=Q _b2, | Q _a1-Q _a10|>=| Q _b1-Q _b10|, | Q _a2-Q _a20|>=| Q _b2-Q _b20|, described in step 3, compound criterion is as follows:

   Criterion 1: given threshold epsilon ₉, ε ₁₀, judge $\left\{\begin{array}{c}1\&le;\frac{Q_{A1}}{Q_{B1}}\&le;(1+{\mathrm{\&epsiv;}}_9)\frac{Q_{A10}}{Q_{A10}}\\ 1\&le;\frac{Q_{A2}}{Q_{B2}}\&le;(1+{\mathrm{\&epsiv;}}_{10})\frac{Q_{A20}}{Q_{B20}}\end{array}\right.$ Whether set up;

   Criterion 2: given threshold epsilon ₁₁, ε ₁₂, judge $\left\{\begin{array}{c}\left|\frac{Q_{A1}-Q_{A10}}{Q_{B1}-Q_{B10}}\right|<(1+{\mathrm{\&epsiv;}}_{11})\\ \frac{|Q_{A2}-Q_{A20}|}{|Q_{B2}-Q_{B20}|}\&le;(1+{\mathrm{\&epsiv;}}_{12})\end{array}\right.$ Whether set up;

   Criterion 3: given threshold epsilon ₁₃, ε ₁₄, Bu Fangshe

   $(n^{Q_{A2}}+n^{Q_{B2}})\&GreaterEqual;(n^{Q_{A20}}+n^{Q_{B20}}),$ Judge $\left\{\begin{array}{c}1\&le;\frac{n^{Q_{A1}}+n^{Q_{B1}}}{n^{Q_{A10}}+n^{Q_{B10}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{13}\right)\\ 1\&le;\frac{n^{Q_{A2}}+n^{Q_{B2}}}{n^{Q_{A20}}+n^{Q_{B20}}}\&le;\left(1+{\mathrm{\&epsiv;}}_{14}\right)\end{array}\right.$ Whether set up;

   Wherein: Q _a20, Q _b20idle for front two the main transformer low-pressure sides of pressure regulation; Q _a2, Q _b2for two main transformer low-pressure sides idle of Real-time Obtaining;

   Send out in the s second after pressure regulation order to parallel transformer from AVC, if three compound criterions meet all simultaneously, then can think that transformer is transferred the files successfully above, but gear telemetry intelligence (TELINT) in time on give; If s did not all meet after second in these three criterions, then two transformer mistake gears are described, there is circulation, can be judged as transferring the files unsuccessfully, the span of s is: 180 ~ 360 seconds.