CN102684212A - Device for automatically adjusting three-phase load imbalance - Google Patents
Device for automatically adjusting three-phase load imbalance Download PDFInfo
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- CN102684212A CN102684212A CN2012101818174A CN201210181817A CN102684212A CN 102684212 A CN102684212 A CN 102684212A CN 2012101818174 A CN2012101818174 A CN 2012101818174A CN 201210181817 A CN201210181817 A CN 201210181817A CN 102684212 A CN102684212 A CN 102684212A
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Abstract
The invention provides a device for automatically adjusting three-phase load imbalance. The device for automatically adjusting the three-phase load imbalance comprises a detection recording module, a logic control module and an execution module. The detection recording module comprises a current mutual inductance detecting part and a data recording part, wherein the current mutual inductance detecting part is connected with a three-phase transmission line to detect three-phase imbalance load data and transmit the three-phase imbalance load data to the data recording part, and the data recording part records and stores the three-phase imbalance load data. The logic control module is connected with the detection recording module to logically judge the three-phase imbalance load data so as to obtain a light load phase. The execution module is respectively connected with the logic control module and the three-phase transmission line so as to automatically compensate and adjust a single phase load according to the logic judgment result of the logic control module. The device automatically adjusts three-phase load imbalance and avoids a phenomenon that user equipment and transformers are burnt due to three-phase load imbalance.
Description
Technical field
The invention belongs to distribution system three-phase load regulation technology field, specifically, related to the uneven automatic regulating apparatus of a kind of three-phase load.
Background technology
At present; The adjustment means of distribution transformer load mainly are that elder generation surveys load through card, and then manual work adjustment balance; Yet this mode exists various disadvantages: 1, the rural power grids load variations is big; Season, different load was different, and peak of power consumption, low ebb are all different every day, must carry out manual work adjustment continually; 2, carry out people's work card and survey when loading, can only react three-phase load at that time, can not reflect the cyclic variation of distribution transforming; 3, interval certain time interval between twice adjustment if three-phase load variation during this period of time exceeds standard, then is very easy to burn out equipment and distribution transforming.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The objective of the invention is deficiency, thereby provide a kind of three-phase load simple in structure, easy to use, that adjustment is effective uneven automatic regulating apparatus to prior art.
To achieve these goals; The technical scheme that the present invention adopted is: the uneven automatic regulating apparatus of a kind of three-phase load; It comprises detection record module, Logic control module and Executive Module; Said detection record module comprises electric current mutual inductance test section and data recording portion, and said electric current mutual inductance test section connects three phase line and carries out stored record to detect the three-phase imbalance load data and said three-phase imbalance load data are sent to said data recording portion; Thereby said Logic control module connects said detection record module draws the light load phase so that said three-phase imbalance load data are carried out logic determines; Said Executive Module connects said Logic control module respectively and three phase line carries out the automatic compensation adjustment of single-phase load with the logic determines result according to said Logic control module.
Based on above-mentioned, this automatic regulating apparatus comprises four logic relays, four contactors and three current monitors that are connected with three phase line (CTa, CTb, CTc); Said current monitor (CTa, CTb, CTc) and four said logic relays have been formed the detection control loop, and four said logic relays and four said contactors have been formed compensation major loop and loop control logic;
In said detection control loop; The end of the said first current monitor CTa connects the end of the said first logic relay coil 1LJ; The other end of the said first logic relay coil 1LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said first current monitor CTa; The end of the said second current monitor CTb connects the end of the said second logic relay coil 2LJ; The other end of the said second logic relay coil 2LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said second current monitor CTb; The end of said the 3rd current monitor CTc connects the end of said the 3rd logic relay coil 3LJ; The other end of said the 3rd logic relay coil 3LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of said the 3rd current monitor CTc;
Said compensation major loop comprises first, second and the 3rd normally opened contact of said first contactor; First, second of said second contactor and the 3rd normally opened contact; First, second and the 3rd normally opened contact of first, second of said the 3rd contactor and the 3rd normally opened contact and said the 4th contactor; One end of first, second of said first contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said first contactor and the 3rd normally opened contact all is connected the A phase of three phase line; One end of first, second of said second contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said second contactor and the 3rd normally opened contact all is connected the B phase of three phase line; One end of first, second of said the 3rd contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said the 3rd contactor and the 3rd normally opened contact all is connected the C phase of three phase line; One end of first, second of said the 4th contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and first, second of said the 4th contactor and the other end of the 3rd normally opened contact are connected A, B, the C phase of three phase line respectively;
Said loop control logic comprises that Balance Control branch road, A control branch road, B mutually and control branch road mutually and control branch road mutually with C; The first normally-closed contact 3C-11 and said the 4th contactor coil C that said Balance Control is propped up the first normally-closed contact 1LJ-11 that route is connected on said first logic relay on the same line road successively, the first normally-closed contact 2LJ-11 of said second logic relay, the first normally-closed contact 3LJ-11 of said the 3rd logic relay, the first normally-closed contact 1C-11 of said first contactor, the first normally-closed contact 2C-11 of said second contactor, said the 3rd contactor form; One end of said Balance Control branch road connects the B phase of three phase line, and the other end of said Balance Control branch road connects the A phase of three phase line;
Said A controls the second normally-closed contact 3C-12 and the said first contactor coil 1C that branch road comprises the second normally-closed contact 2C-12 of the 4th normally opened contact 1C-24 of the first normally opened contact 0LJ-21 of the first normally opened contact 1LJ-21 of said first logic relay, said the 4th logic relay, said first contactor, said second contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 1LJ-21 of said first logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said A; The other end of the first normally opened contact 1LJ-21 of said first logic relay connects the end of the first normally opened contact 0LJ-21 of said the 4th logic relay; The other end of the first normally opened contact 0LJ-21 of said the 4th logic relay connects the end of the said first contactor coil 1C; The end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the first normally opened contact 1LJ-21 of said first logic relay; The other end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the second normally-closed contact 2C-12 of said second contactor; The other end of the second normally-closed contact 2C-12 of said second contactor connects the end of the second normally-closed contact 3C-12 of said the 3rd contactor; The other end of the second normally-closed contact 3C-12 of said the 3rd contactor connects the other end of the first normally opened contact 0LJ-21 of said the 4th logic relay, and the other end of the said first contactor coil 1C is controlled the A phase of the other end connection three phase line of branch road mutually as said A;
Said B controls the 3rd normally-closed contact 3C-13 and the said second contactor coil 2C that branch road comprises the second normally-closed contact 1C-12 of the 4th normally opened contact 2C-24 of the second normally opened contact 0LJ-22 of the first normally opened contact 2LJ-21 of said second logic relay, said the 4th logic relay, said second contactor, said first contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 2LJ-21 of said second logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said B; The other end of the first normally opened contact 2LJ-21 of said second logic relay connects the end of the second normally opened contact 0LJ-22 of said the 4th logic relay; The other end of the second normally opened contact 0LJ-22 of said the 4th logic relay connects the end of the said second contactor coil 2C; The end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the first normally opened contact 2LJ-21 of said second logic relay; The other end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the second normally-closed contact 1C-12 of said first contactor; The other end of the second normally-closed contact 1C-12 of said first contactor connects the end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor; The other end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor connects the other end of the second normally opened contact 0LJ-22 of said the 4th logic relay, and the other end of the said first contactor coil 2C is controlled the A phase of the other end connection three phase line of branch road mutually as said B;
Said C controls the 3rd normally-closed contact 2C-13 and said the 3rd contactor coil 3C that branch road comprises the 3rd normally-closed contact 1C-13 of the 4th normally opened contact 3C-24 of the 3rd normally opened contact 0LJ-23 of the first normally opened contact 3LJ-21 of said the 3rd logic relay, said the 4th logic relay, said the 3rd contactor, said first contactor, said second contactor mutually; Wherein, The end of the first normally opened contact 3LJ-21 of said the 3rd logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said C; The other end of the first normally opened contact 3LJ-21 of said the 3rd logic relay connects the end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay; The other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay connects the end of said the 3rd contactor coil 3C; The end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the first normally opened contact 3LJ-21 of said the 3rd logic relay; The other end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the 3rd normally-closed contact 1C-13 of said first contactor; The other end of the 3rd normally-closed contact 1C-13 of said first contactor connects the end of the 3rd normally-closed contact 2C-13 of said second contactor; The other end of the 3rd normally-closed contact 2C-13 of said second contactor connects the other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay, and the other end of said the 3rd contactor coil 3C is controlled the A phase of the other end connection three phase line of branch road mutually as said C.
The relative prior art of the present invention has outstanding substantive distinguishing features and marked improvement, and specifically, the present invention can adjust the three-phase load imbalance automatically, stops burning of load unbalanced subscriber equipment that causes of the three characteristics of the middle term and distribution transforming.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Fig. 2 is an electrical block diagram of the present invention.
Embodiment
Through embodiment, technical scheme of the present invention is done further detailed description below.
As shown in Figure 1; The uneven automatic regulating apparatus of a kind of three-phase load; It comprises detection record module, Logic control module and Executive Module; Said detection record module comprises electric current mutual inductance test section and data recording portion, and said electric current mutual inductance test section connects three phase line and carries out stored record to detect the three-phase imbalance load data and said three-phase imbalance load data are sent to said data recording portion;
Thereby said Logic control module connects said detection record module draws the light load phase so that said three-phase imbalance load data are carried out logic determines; Said Executive Module connects said Logic control module respectively and three phase line carries out the automatic compensation adjustment of single-phase load with the logic determines result according to said Logic control module.
As shown in Figure 2, be the electrical block diagram of specifically realizing this automatic regulating apparatus, this automatic regulating apparatus comprises four logic relays, four contactors, three current monitor CTa, CTb, CTc that are connected with A, B, C three phase line respectively; Said current monitor CTa, CTb, CTc and four said logic relays have been formed the detection control loop, and four said logic relays and four said contactors have been formed compensation major loop and loop control logic.
In said detection control loop; The end of the said first current monitor CTa connects the end of the said first logic relay coil 1LJ; The other end of the said first logic relay coil 1LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said first current monitor CTa; The end of the said second current monitor CTb connects the end of the said second logic relay coil 2LJ; The other end of the said second logic relay coil 2LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said second current monitor CTb; The end of said the 3rd current monitor CTc connects the end of said the 3rd logic relay coil 3LJ; The other end of said the 3rd logic relay coil 3LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of said the 3rd current monitor CTc.
Said current monitor CTa, CTb, CTc detect and record uncompensated load electric current; Four said logic relays detect the definite value load current that exceeds the quata through said current monitor CTa, CTb, CTc; Be used to judge the balance of A, B, C three-phase load; When A, B, C three-phrase burden balance; The said first logic relay coil 1LJ, the said second logic relay coil 2LJ and said the 3rd logic relay coil 3LJ all do not detect the definite value three-phase load electric current that exceeds the quata; Said the 4th logic relay coil 0LJ does not detect the definite value zero-sequence current that exceeds the quata yet, so said first logic relay, said second logic relay, said the 3rd logic relay, said the 4th logic relay all do not start; When the A phase load low excessively; The said first logic relay coil 1LJ detects the definite value three-phase load electric current that exceeds the quata; Said the 4th logic relay coil 0LJ detects the zero-sequence current of the definite value that exceeds the quata, and then said first logic relay and said the 4th logic relay start; When the B phase load low excessively; The said second logic relay coil 2LJ detects the definite value three-phase load electric current that exceeds the quata; Said the 4th logic relay coil 0LJ detects the zero-sequence current of the definite value that exceeds the quata, and then said second logic relay and said the 4th logic relay start; When the C phase load low excessively; Said the 3rd logic relay coil 3LJ detects the definite value three-phase load electric current that exceeds the quata; Said the 4th logic relay coil 0LJ detects the zero-sequence current of the definite value that exceeds the quata, and then said the 3rd logic relay and said the 4th logic relay start.
With three parts of single-phase load mean allocation that is no more than total load 15% as three single-phase compensation loads; The compensation process of three-phase load is accomplished by said compensation major loop and said loop control logic jointly; Wherein, First, second of first, second of first, second of first, second that said compensation major loop comprises said first contactor and the 3rd normally opened contact, said second contactor and the 3rd normally opened contact, said the 3rd contactor and the 3rd normally opened contact and said the 4th contactor and the 3rd normally opened contact; One end of first, second of said first contactor and the 3rd normally opened contact is connected single-phase compensation load respectively; The other end of first, second of said first contactor and the 3rd normally opened contact all is connected the A phase of three phase line, three single-phase compensation loads are inserted the A phase of three phase line; One end of first, second of said second contactor and the 3rd normally opened contact is connected single-phase compensation load respectively; The other end of first, second of said second contactor and the 3rd normally opened contact all is connected the B phase of three phase line, three single-phase compensation loads are inserted the B phase of three phase line; One end of first, second of said the 3rd contactor and the 3rd normally opened contact is connected single-phase compensation load respectively; The other end of first, second of said the 3rd contactor and the 3rd normally opened contact all is connected the C phase of three phase line, three single-phase compensation loads are inserted the C phase of three phase line; One end of first, second of said the 4th contactor and the 3rd normally opened contact is connected single-phase compensation load respectively; First, second of said the 4th contactor and the other end of the 3rd normally opened contact are connected A, B, the C phase of three phase line respectively, three single-phase compensation loads are inserted A, B, the C three-phase of three phase lines.
Said loop control logic comprises that Balance Control branch road, A control branch road, B mutually and control branch road mutually and control branch road mutually with C; Through the action of said loop control logic, three-phase compensation load can compensate to load unbalanced three phase line through said compensation major loop.
The first normally-closed contact 3C-11 and said the 4th contactor coil C that said Balance Control is propped up the first normally-closed contact 1LJ-11 that route is connected on said first logic relay on the same line road successively, the first normally-closed contact 2LJ-11 of said second logic relay, the first normally-closed contact 3LJ-11 of said the 3rd logic relay, the first normally-closed contact 1C-11 of said first contactor, the first normally-closed contact 2C-11 of said second contactor, said the 3rd contactor form; One end of said Balance Control branch road connects the B phase of three phase line; The other end of said Balance Control branch road connects the A phase of three phase line, so that said the 4th contactor coil C to be provided required supply voltage;
When A, B, C three-phrase burden balance; Said first logic relay, said second logic relay, said the 3rd logic relay, said the 4th logic relay all do not start; The 4th contactor coil C energising of said Balance Control branch road; First, second of said the 4th contactor is closed with the 3rd normally opened contact, with A, B, the C three-phase of three single-phase compensation load access three phase lines, simultaneously; The first normally-closed contact C-11 of said the 4th contactor breaks off, with the power supply disconnection of the said first contactor coil 1C, the said second contactor coil 2C and said the 3rd contactor coil 3C.
Said A controls the second normally-closed contact 3C-12 and the said first contactor coil 1C that branch road comprises the second normally-closed contact 2C-12 of the 4th normally opened contact 1C-24 of the first normally opened contact 0LJ-21 of the first normally opened contact 1LJ-21 of said first logic relay, said the 4th logic relay, said first contactor, said second contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 1LJ-21 of said first logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said A; The other end of the first normally opened contact 1LJ-21 of said first logic relay connects the end of the first normally opened contact 0LJ-21 of said the 4th logic relay; The other end of the first normally opened contact 0LJ-21 of said the 4th logic relay connects the end of the said first contactor coil 1C; The end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the first normally opened contact 1LJ-21 of said first logic relay; The other end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the second normally-closed contact 2C-12 of said second contactor; The other end of the second normally-closed contact 2C-12 of said second contactor connects the end of the second normally-closed contact 3C-12 of said the 3rd contactor; The other end of the second normally-closed contact 3C-12 of said the 3rd contactor connects the other end of the first normally opened contact 0LJ-21 of said the 4th logic relay; The other end that the other end of the said first contactor coil 1C is controlled branch road mutually as said A connects the A phase of three phase line, so that the said first contactor coil 1C to be provided required supply voltage.
When the A phase load low excessively; Said first logic relay and said the 4th logic relay start, and the first normally-closed contact 1LJ-11 of said first logic relay breaks off, and are about to first, second and the disconnection of the 3rd normally opened contact of the 4th contactor on the said compensation major loop after said the 4th contactor coil C dead electricity; At this moment; It is closed that the first normally-closed contact C-11 of said the 4th contactor recovers, with the said first contactor coil 1C power connection, and then; First, second of said first contactor is closed with the 3rd normally opened contact, three single-phase compensation loads is inserted the A phase of three phase line.First, second of said first contactor breaks off with the 3rd normally-closed contact 1C-11,1C-12,1C-13, with the power supply disconnection of said the 4th contactor coil C, the said second contactor coil 2C and said the 3rd contactor coil 3C.After single-phase compensation load inserts; The transmission line three-phase load recovers in the normal value; It is normal that said first logic relay and said the 4th logic relay recover; Normal condition is also recovered in each contact of said first logic relay and said the 4th logic relay, and at this moment, the said first contactor coil 1C keeps charged through self-holding circuit.
Said B controls the 3rd normally-closed contact 3C-13 and the said second contactor coil 2C that branch road comprises the second normally-closed contact 1C-12 of the 4th normally opened contact 2C-24 of the second normally opened contact 0LJ-22 of the first normally opened contact 2LJ-21 of said second logic relay, said the 4th logic relay, said second contactor, said first contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 2LJ-21 of said second logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said B; The other end of the first normally opened contact 2LJ-21 of said second logic relay connects the end of the second normally opened contact 0LJ-22 of said the 4th logic relay; The other end of the second normally opened contact 0LJ-22 of said the 4th logic relay connects the end of the said second contactor coil 2C; The end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the first normally opened contact 2LJ-21 of said second logic relay; The other end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the second normally-closed contact 1C-12 of said first contactor; The other end of the second normally-closed contact 1C-12 of said first contactor connects the end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor; The other end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor connects the other end of the second normally opened contact 0LJ-22 of said the 4th logic relay; The other end that the other end of the said first contactor coil 2C is controlled branch road mutually as said B connects the A phase of three phase line, so that the said second contactor coil 2C to be provided required supply voltage.
When the B phase load low excessively; Said second logic relay and said the 4th logic relay start; First normally opened contact 2LJ-21 of said second logic relay and the second normally opened contact 0LJ-22 of said the 4th logic relay are closed, with the said second contactor coil 2C power connection, thereby; First, second of said second contactor is closed with the 3rd normally opened contact, three single-phase compensation loads is inserted the B phase of three phase line.First, second of said second contactor breaks off with the 3rd normally-closed contact 2C-11,2C-12,2C-13; The power supply of said the 4th contactor coil C, the said first contactor coil 1C and said the 3rd contactor coil 3C is broken off, and the self-holding circuit with the said first contactor coil 1C breaks off simultaneously.After single-phase compensation load inserts; The transmission line three-phase load recovers in the normal value; It is normal that said second logic relay and said the 4th logic relay recover; Normal condition is also recovered in each contact of said second logic relay and said the 4th logic relay, and at this moment, the said second contactor coil 2C keeps charged through self-holding circuit.
Said C controls the 3rd normally-closed contact 2C-13 and said the 3rd contactor coil 3C that branch road comprises the 3rd normally-closed contact 1C-13 of the 4th normally opened contact 3C-24 of the 3rd normally opened contact 0LJ-23 of the first normally opened contact 3LJ-21 of said the 3rd logic relay, said the 4th logic relay, said the 3rd contactor, said first contactor, said second contactor mutually; Wherein, The end of the first normally opened contact 3LJ-21 of said the 3rd logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said C; The other end of the first normally opened contact 3LJ-21 of said the 3rd logic relay connects the end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay; The other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay connects the end of said the 3rd contactor coil 3C; The end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the first normally opened contact 3LJ-21 of said the 3rd logic relay; The other end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the 3rd normally-closed contact 1C-13 of said first contactor; The other end of the 3rd normally-closed contact 1C-13 of said first contactor connects the end of the 3rd normally-closed contact 2C-13 of said second contactor; The other end of the 3rd normally-closed contact 2C-13 of said second contactor connects the other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay; The other end that the other end of said the 3rd contactor coil 3C is controlled branch road mutually as said C connects the A phase of three phase line, so that the said second contactor coil 2C to be provided required supply voltage.
When the C phase load low excessively; Said the 3rd logic relay and said the 4th logic relay start; First normally opened contact 3LJ-21 of said the 3rd logic relay and the 3rd normally opened contact 0LJ-23 of said the 4th logic relay are closed, with the said second contactor coil 3C power connection, thereby; First, second of said the 3rd contactor is closed with the 3rd normally opened contact, three single-phase compensation loads is inserted the C phase of three phase line.First, second of said the 3rd contactor breaks off with the 3rd normally-closed contact 3C-11,3C-12,3C-13; The power supply of said the 4th contactor coil C, the said first contactor coil 1C and the said second contactor coil 2C is broken off, and the self-holding circuit with the said second contactor coil 2C breaks off simultaneously.After single-phase compensation load inserts; The transmission line three-phase load recovers in the normal value; It is normal that said the 3rd logic relay and said the 4th logic relay recover; Normal condition is also recovered in each contact of said the 3rd logic relay and said the 4th logic relay, and at this moment, said the 3rd contactor coil 3C keeps charged through self-holding circuit.
Through the acting in conjunction of said compensation major loop and said loop control logic, adjust balance in the A that single-phase compensation is loaded at transmission line, B, the C three-phase automatically, saved the trouble of artificial frequent adjustment, alleviated staff's burden greatly.
For more safe and reliable; The present invention can be provided with warning circuit; When the automatic adjustment function of device still can not balanced load; Said warning circuit module starts reports to the police, and the attendant drops into this automatic regulating apparatus after with the artificial leveling of three-phase imbalance load more again, adjusts three-phase imbalance load again automatically.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (2)
1. the uneven automatic regulating apparatus of a three-phase load; It is characterized in that: it comprises detection record module, Logic control module and Executive Module; Said detection record module comprises electric current mutual inductance test section and data recording portion, and said electric current mutual inductance test section connects three phase line and carries out stored record to detect the three-phase imbalance load data and said three-phase imbalance load data are sent to said data recording portion; Thereby said Logic control module connects said detection record module draws the light load phase so that said three-phase imbalance load data are carried out logic determines; Said Executive Module connects said Logic control module respectively and three phase line carries out the automatic compensation adjustment of single-phase load with the logic determines result according to said Logic control module.
2. the uneven automatic regulating apparatus of three-phase load according to claim 1 is characterized in that: this automatic regulating apparatus comprises four logic relays, four contactors and three current monitors that are connected with three phase line (CTa, CTb, CTc); Said current monitor (CTa, CTb, CTc) and four said logic relays have been formed the detection control loop, and four said logic relays and four said contactors have been formed compensation major loop and loop control logic; In said detection control loop; The end of the said first current monitor CTa connects the end of the said first logic relay coil 1LJ; The other end of the said first logic relay coil 1LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said first current monitor CTa; The end of the said second current monitor CTb connects the end of the said second logic relay coil 2LJ; The other end of the said second logic relay coil 2LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of the said second current monitor CTb; The end of said the 3rd current monitor CTc connects the end of said the 3rd logic relay coil 3LJ; The other end of said the 3rd logic relay coil 3LJ connects the end of said the 4th logic relay coil 0LJ, and the other end of said the 4th logic relay coil 0LJ connects the other end of said the 3rd current monitor CTc; Said compensation major loop comprises first, second and the 3rd normally opened contact of said first contactor; First, second of said second contactor and the 3rd normally opened contact; First, second and the 3rd normally opened contact of first, second of said the 3rd contactor and the 3rd normally opened contact and said the 4th contactor; One end of first, second of said first contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said first contactor and the 3rd normally opened contact all is connected the A phase of three phase line; One end of first, second of said second contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said second contactor and the 3rd normally opened contact all is connected the B phase of three phase line; One end of first, second of said the 3rd contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and the other end of first, second of said the 3rd contactor and the 3rd normally opened contact all is connected the C phase of three phase line; One end of first, second of said the 4th contactor and the 3rd normally opened contact is connected single-phase compensation load respectively, and first, second of said the 4th contactor and the other end of the 3rd normally opened contact are connected A, B, the C phase of three phase line respectively; Said loop control logic comprises that Balance Control branch road, A control branch road, B mutually and control branch road mutually and control branch road mutually with C; The first normally-closed contact 3C-11 and said the 4th contactor coil C that said Balance Control is propped up the first normally-closed contact 1LJ-11 that route is connected on said first logic relay on the same line road successively, the first normally-closed contact 2LJ-11 of said second logic relay, the first normally-closed contact 3LJ-11 of said the 3rd logic relay, the first normally-closed contact 1C-11 of said first contactor, the first normally-closed contact 2C-11 of said second contactor, said the 3rd contactor form; One end of said Balance Control branch road connects the B phase of three phase line, and the other end of said Balance Control branch road connects the A phase of three phase line; Said A controls the second normally-closed contact 3C-12 and the said first contactor coil 1C that branch road comprises the second normally-closed contact 2C-12 of the 4th normally opened contact 1C-24 of the first normally opened contact 0LJ-21 of the first normally opened contact 1LJ-21 of said first logic relay, said the 4th logic relay, said first contactor, said second contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 1LJ-21 of said first logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said A; The other end of the first normally opened contact 1LJ-21 of said first logic relay connects the end of the first normally opened contact 0LJ-21 of said the 4th logic relay; The other end of the first normally opened contact 0LJ-21 of said the 4th logic relay connects the end of the said first contactor coil 1C; The end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the first normally opened contact 1LJ-21 of said first logic relay; The other end of the 4th normally opened contact 1C-24 of said first contactor connects the end of the second normally-closed contact 2C-12 of said second contactor; The other end of the second normally-closed contact 2C-12 of said second contactor connects the end of the second normally-closed contact 3C-12 of said the 3rd contactor; The other end of the second normally-closed contact 3C-12 of said the 3rd contactor connects the other end of the first normally opened contact 0LJ-21 of said the 4th logic relay, and the other end of the said first contactor coil 1C is controlled the A phase of the other end connection three phase line of branch road mutually as said A; Said B controls the 3rd normally-closed contact 3C-13 and the said second contactor coil 2C that branch road comprises the second normally-closed contact 1C-12 of the 4th normally opened contact 2C-24 of the second normally opened contact 0LJ-22 of the first normally opened contact 2LJ-21 of said second logic relay, said the 4th logic relay, said second contactor, said first contactor, said the 3rd contactor mutually; Wherein, The end of the first normally opened contact 2LJ-21 of said second logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said B; The other end of the first normally opened contact 2LJ-21 of said second logic relay connects the end of the second normally opened contact 0LJ-22 of said the 4th logic relay; The other end of the second normally opened contact 0LJ-22 of said the 4th logic relay connects the end of the said second contactor coil 2C; The end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the first normally opened contact 2LJ-21 of said second logic relay; The other end of the 4th normally opened contact 2C-24 of said second contactor connects the end of the second normally-closed contact 1C-12 of said first contactor; The other end of the second normally-closed contact 1C-12 of said first contactor connects the end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor; The other end of the 3rd normally-closed contact 3C-13 of said the 3rd contactor connects the other end of the second normally opened contact 0LJ-22 of said the 4th logic relay, and the other end of the said first contactor coil 2C is controlled the A phase of the other end connection three phase line of branch road mutually as said B; Said C controls the 3rd normally-closed contact 2C-13 and said the 3rd contactor coil 3C that branch road comprises the 3rd normally-closed contact 1C-13 of the 4th normally opened contact 3C-24 of the 3rd normally opened contact 0LJ-23 of the first normally opened contact 3LJ-21 of said the 3rd logic relay, said the 4th logic relay, said the 3rd contactor, said first contactor, said second contactor mutually; Wherein, The end of the first normally opened contact 3LJ-21 of said the 3rd logic relay is controlled the B phase of an end of branch road through the first normally-closed contact C-11 connection three phase line of said the 4th contactor mutually as said C; The other end of the first normally opened contact 3LJ-21 of said the 3rd logic relay connects the end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay; The other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay connects the end of said the 3rd contactor coil 3C; The end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the first normally opened contact 3LJ-21 of said the 3rd logic relay; The other end of the 4th normally opened contact 3C-24 of said the 3rd contactor connects the end of the 3rd normally-closed contact 1C-13 of said first contactor; The other end of the 3rd normally-closed contact 1C-13 of said first contactor connects the end of the 3rd normally-closed contact 2C-13 of said second contactor; The other end of the 3rd normally-closed contact 2C-13 of said second contactor connects the other end of the 3rd normally opened contact 0LJ-23 of said the 4th logic relay, and the other end of said the 3rd contactor coil 3C is controlled the A phase of the other end connection three phase line of branch road mutually as said C.
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