CN217587447U - Intelligent energy efficiency device of distribution transformer and conversion circuit for intelligent detection - Google Patents
Intelligent energy efficiency device of distribution transformer and conversion circuit for intelligent detection Download PDFInfo
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Abstract
The application belongs to the technical field of electric power, and discloses a distribution transformer energy efficiency intelligent device, the device is provided with a power supply module, a control module, a communication module, a test power supply module, an empty load switching module, a direct resistance transformation ratio switching module, a transformation ratio test module, a direct resistance test module, a computer and a database, the power supply module supplies power to the control module and the communication module, the control module is used for controlling the empty load switching module, the direct resistance transformation ratio switching module, the transformation ratio test module, the action of the direct resistance test module and the transformation ratio test module, and data transmission is carried out between the direct resistance test module, the control module and the communication module can be communicated with each other, the communication module and the computer can be communicated with each other, the database is installed in the computer, and the test power supply module supplies power to the empty load switching module. The application also discloses a conversion circuit for the intelligent energy efficiency detection. The application has the following beneficial technical effects: the structure is simplified, the use is convenient, the detection efficiency is higher, and the operating personnel are safer.
Description
Technical Field
The application belongs to the technical field of electric power, and particularly relates to an energy efficiency intelligent device of a distribution transformer and a conversion circuit for intelligent detection.
Background
The distribution transformer is generally a double-winding transformer, almost all the connection modes and connection group labels are Dyn11 according to the actual situation of China, and 5 tapped RABs, RBCs and RCAs at the high-voltage side and RABs, rbc and Rca at the low-voltage side need to be tested for the distribution transformer with the tapping range of +/-2 x 2.5%. For a single-channel direct current resistance tester, if manual wiring is performed, 18 times of wire changing actions are required, and the test efficiency is very low.
Meanwhile, when no-load tests are carried out, the high-voltage side of the transformer can reach the highest 11kV line voltage level, and when no-load tests are carried out, test wires on the high-voltage side need to be manually removed, so that direct resistance, no-load and load tests cannot be wired at one time and cannot be automatically completed.
CN114034953A discloses distribution transformer efficiency measurement check out test set, its structure is including placing the platform, the electric cabinet, a support frame, position adjustment mechanism, place bench face and install the electric cabinet, and place a back side and weld with the support frame lower extreme mutually, adjust the resistance test head to the position of contradicting with the coil outside, carry out elastic support through the spring beam, the wire carries out synchronous traction, drive the take-up reel through torque spring and rotate, length to the wire carries out automatically regulated, ensure that the resistance test head normally circular telegram, prevent that the resistance test head from taking place to drop from the coil, the in-process transformer outside middle-end that the link dish descends is conflicting extrusion slider, laminating piece outside both ends draw close to the inboard, at this moment the extrusion ball produces elasticity, thereby improve the ability of contradicting of contact piece and transformer outside surface, avoid the detection head of link dish lower extreme to take place the displacement in the in-process of carrying out the detection, thereby improve the accuracy that the detection head carries out resistance detection to the coil.
CN114325499A discloses a distribution transformer energy efficiency comprehensive detection mobile platform, which comprises a mobile rack and an industrial personal computer, wherein the industrial personal computer is arranged above the mobile rack and used for realizing human-computer interaction; the transformer transformation ratio tester, the transformer direct-current resistance tester, the transformer insulation resistance tester and the transformer no-load tester are sequentially stacked and arranged on one side of the middle part of the movable rack; the variable-frequency programmable power supply is arranged on the other side of the middle part of the movable rack; the integrated measurement circuit switching unit is arranged in the middle of the middle part of the mobile rack; the booster is mounted on the mobile rack; the industrial personal computer, the transformer transformation ratio tester, the transformer direct current resistance tester, the transformer insulation resistance tester, the transformer no-load tester, the variable frequency program control power supply and the booster are all connected to the integrated measurement circuit switching unit. The utility model discloses the integrated level is high, avoids repeated wiring, and the inspection flow is simple, practices thrift the manual work, and work efficiency is showing and is improving.
CN214201623U discloses a comprehensive energy efficiency test platform, which comprises a switch cabinet, a rectifying device, a DC bus, an asynchronous motor inversion branch, a variable frequency motor inversion branch, a charging pile energy efficiency detection branch, a transformer energy efficiency detection branch, and a tested motor detection circuit; the tested motor detection circuit comprises a second low-voltage measuring device, a tested motor junction box, a tested motor, a load motor junction box and a load motor inverter which are sequentially connected in series, wherein the output end of the load motor is connected with a direct-current bus through the load motor junction box and the load motor inverter; the transformer energy efficiency detection branch comprises a tested transformer, a transformer load, a sixth switch, a first breaker and a third breaker, and the charging pile energy efficiency detection branch comprises a tested charging pile, a charging pile load, a fifth switch, a first breaker and a second breaker.
CN214201706U discloses a multifunctional motor energy efficiency test platform, which comprises a switch cabinet, a rectifying device, a direct-current bus, an asynchronous motor inversion branch, a variable-frequency motor inversion branch, a high-speed automobile motor inversion branch and a tested motor detection circuit; the tested motor detection circuit comprises a second low-voltage measuring device, a tested motor junction box, a tested motor, a load motor and a load motor junction box which are sequentially connected in series, wherein the output end of the load motor is connected with a direct-current bus through the load motor junction box and a load motor inverter; the asynchronous motor inversion branch circuit comprises a tested motor inverter, a filter, an asynchronous motor transformer and a first switch which are sequentially connected in series, the switch cabinet is connected with the tested motor inverter through a rectifying device, and the first switch is connected with a second low-voltage measuring device.
Above-mentioned prior art can not solve artifical wiring many, test efficiency low, the artifical test wire who removes the high-pressure side is dangerous, leads to directly hindering, no-load and load test can't once wiring, can't accomplish technical problem such as automatically.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a distribution transformer efficiency intelligent device and conversion circuit for intellectual detection system, it is realized that it adopts following technical scheme.
The utility model provides a distribution transformer efficiency intelligence device, the power module has, control module, communication module, experimental power module, empty load switch module, direct resistance transformation ratio switch module, transformation ratio test module, direct current resistance test module, a computer, a database, power module supplies to control module and communication module electric power, control module is used for controlling empty load switch module, direct resistance transformation ratio switch module, transformation ratio test module, direct current resistance test module's action and with transformation ratio test module, carry out data transmission between the direct current resistance test module, control module and communication module can intercommunication, can intercommunication between communication module and the computer, the database is installed in the computer, experimental power module supplies empty load switch module electric power, the alternating current commercial power supplies transformation ratio test module, direct current resistance test module, computer electric power.
A switching circuit for intelligently detecting the energy efficiency of a distribution transformer is composed of a low-voltage direct-resistance transformation ratio switching control component and a high-voltage direct-resistance transformation ratio switching control component, and is characterized in that the low-voltage direct-resistance transformation ratio switching control component is a contactor with six pairs of input and output ends, namely six switches, the input ends of a first pair of switches of the low-voltage direct-resistance transformation ratio switching control component are connected with a c-phase voltage measuring line, the output end of a first pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with the c end of the low-voltage side of a tested transformer, the input end of a third pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with a b-phase voltage measuring line, the output end of a third pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with the b end of the low-voltage side of the tested transformer, the input end of a fourth pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with a end of the low-voltage side of the tested transformer, the input end of the fifth pair of the low-voltage direct-resistance transformation ratio switching control component is connected with a measured end of the low-voltage side of the tested transformer, and the input end of the low-voltage direct-resistance transformation ratio switching control component is connected with a measured by the fifth pair of the low-voltage phase voltage side of the tested transformer; the high-voltage direct-resistance ratio switching control component is a contactor with six pairs of input and output ends, namely, six switches, the input ends of a first pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase current measuring line, the output ends of a first pair of switches of the high-voltage direct-resistance ratio switching control component are connected with the C end on the high-voltage side of the tested transformer, the input ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase voltage measuring line, the output ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with the C end on the high-voltage side of the tested transformer, and the input ends of a third pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a B-phase current measuring line, the output ends of a third pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-B voltage measuring line, the output ends of the fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A current measuring line, the output ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer, the input ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A voltage measuring line, and the output ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer; the low-voltage direct-resistance transformation ratio switching control component and the high-voltage direct-resistance transformation ratio switching control component are controlled by the control module and act simultaneously, and the switch states at the same moment are the same, namely, the contactors are all switched on or off, and the switches are all normally open and can be closed after being electrified.
A conversion circuit for energy efficiency intelligent detection of a distribution transformer is composed of a wiring control part and is characterized in that the wiring control part consists of KM9, KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19 and KM20, all of KM9 to KM20 are contactors, the low-voltage side of the wiring control part consists of KM9, KM10, KM11, KM12, KM13 and KM14, the 2 nd pin of KM9 is connected with an a-phase current measuring line, the 1 st pin of KM9 is connected with I + at the low-voltage side of a direct current resistance tester, the 6 th pin of KM9 is connected with a-phase voltage measuring line, the 5 th pin of KM9 is connected with U + at the low-voltage side of the direct current resistance tester, the 14 th pin of KM9 is connected with a direct resistance a + at the PLC, the 13 th pin of KM9 is connected with an output end of a power supply module +24, A1 of KM9 is connected with a direct resistance a + and the A2 of KM9 is grounded; a2 nd pin of KM12 is connected with a phase current measuring line a, A1 st pin of KM12 is connected with I-at the low-voltage side of a direct current resistance tester, a 6 th pin of KM12 is connected with a phase voltage measuring line a, a 5 th pin of KM12 is connected with U-at the low-voltage side of the direct current resistance tester, a 14 th pin of KM12 is connected with a direct resistance a-of PLC, a 13 th pin of KM12 is connected with the output end of a power supply module +24, A1 of KM12 is connected with the direct resistance a-, and A2 of KM12 is grounded; a2 nd pin of KM10 is connected with a b-phase current measuring line, A1 st pin of KM10 is connected with an I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM10 is connected with a b-phase voltage measuring line, a 5 th pin of KM10 is connected with a U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM10 is connected with a direct resistance b + of PLC, a 13 th pin of KM10 is connected with an output end of a power supply module +24, and an A1 of KM10 is connected with a direct resistance b + and an A2 of KM10 is grounded; a2 nd pin of KM13 is connected with a b-phase current measuring line, A1 st pin of KM13 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of KM13 is connected with a b-phase voltage measuring line, a 5 th pin of KM13 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of KM13 is connected with a direct resistance b-of PLC, a 13 th pin of KM13 is connected with an output end of a power supply module +24, an A1 of KM13 is connected with a direct resistance b-, and an A2 of KM13 is grounded; a2 nd pin of KM11 is connected with a c-phase current measuring line, A1 st pin of KM11 is connected with an I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM11 is connected with a c-phase voltage measuring line, a 5 th pin of KM11 is connected with a U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM11 is connected with a direct resistance c + of PLC, a 13 th pin of KM11 is connected with an output end of a power supply module +24, and an A1 of KM11 is connected with the direct resistance c + and an A2 of KM11 is grounded; a2 nd pin of the KM14 is connected with a c-phase current measuring line, A1 st pin of the KM14 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of the KM14 is connected with a c-phase voltage measuring line, a 5 th pin of the KM14 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of the KM14 is connected with a direct resistance c-of the PLC, a 13 th pin of the KM14 is connected with an output end of the power supply module +24, A1 of the KM14 is connected with a direct resistance c-, and A2 of the KM14 is grounded; the high-voltage side of the wiring control part consists of KM15, KM16, KM17, KM18, KM19 and KM20, the 2 nd pin of KM15 is connected with an A-phase current measuring line, the 1 st pin of KM15 is connected with I + of the high-voltage side of a direct-current resistance tester, the 6 th pin of KM15 is connected with an A-phase voltage measuring line, the 5 th pin of KM15 is connected with U + of the high-voltage side of the direct-current resistance tester, the 14 th pin of KM15 is connected with a direct resistance A + of PLC, the 13 th pin of KM15 is connected with the output end of a power supply module +24, and the A1 of KM15 is connected with a direct resistance A + and the A2 of KM15 is grounded; a2 nd pin of the KM18 is connected with an A phase current measuring line, A1 st pin of the KM18 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM18 is connected with an A phase voltage measuring line, a 5 th pin of the KM18 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM18 is connected with a direct resistance A-of the PLC, a 13 th pin of the KM18 is connected with an output end of the power supply module +24, A1 of the KM18 is connected with a direct resistance A-, and A2 of the KM18 is grounded; a2 nd pin of KM16 is connected with a B-phase current measuring line, A1 st pin of KM16 is connected with an I + at the high-voltage side of a direct-current resistance tester, a 6 th pin of KM16 is connected with a B-phase voltage measuring line, a 5 th pin of KM16 is connected with a U + at the high-voltage side of the direct-current resistance tester, a 14 th pin of KM16 is connected with a direct resistance B + of PLC, a 13 th pin of KM16 is connected with an output end of a power supply module +24, and an A1 of KM16 is connected with the direct resistance B + and an A2 of KM16 is grounded; a2 nd pin of KM19 is connected with a B-phase current measuring line, A1 st pin of KM19 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM19 is connected with a B-phase voltage measuring line, a 5 th pin of KM19 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM19 is connected with a direct resistance B-of PLC, a 13 th pin of KM19 is connected with an output end of a power supply module +24, an A1 of KM19 is connected with a direct resistance B-, and an A2 of KM19 is grounded; a2 nd pin of KM17 is connected with a C-phase current measuring line, A1 st pin of KM17 is connected with an I + at the high-voltage side of a direct-current resistance tester, a 6 th pin of KM17 is connected with a C-phase voltage measuring line, a 5 th pin of KM17 is connected with a U + at the high-voltage side of the direct-current resistance tester, a 14 th pin of KM17 is connected with a direct resistance C + of PLC, a 13 th pin of KM17 is connected with an output end of a power supply module +24, and an A1 of KM17 is connected with the direct resistance C + and an A2 of KM17 is grounded; a2 nd pin of the KM20 is connected with a C-phase current measuring line, A1 st pin of the KM20 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM20 is connected with a C-phase voltage measuring line, a 5 th pin of the KM20 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM20 is connected with a direct resistance C-of the PLC, a 13 th pin of the KM20 is connected with an output end of a power supply module +24, an A1 of the KM20 is connected with the direct resistance C-, and an A2 of the KM20 is grounded; a pair of normally open switches are formed between the 1 st pin and the 2 nd pin of KM9, between the 5 th pin and the 6 th pin of KM7, and between the 13 th pin and the 14 th pin of KM 7; the same applies to KM10-KM20, i.e. KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19, KM20 are: a pair of normally open switches is formed between the 1 st pin and the 2 nd pin, a pair of normally open switches is formed between the 5 th pin and the 6 th pin, and a pair of normally open switches is formed between the 13 th pin and the 14 th pin; during testing, KM9 and KM13, KM10 and KM14, KM11 and KM12 are sequentially put in the low-pressure side, and KM15 and KM19, KM16 and KM20, KM17 and KM18 are sequentially put in the high-pressure side; KM9 and KM13 are charged together with KM15 and KM19, KM10 and KM14 are charged together with KM16 and KM20, and KM11 and KM12 and KM17 and KM18 are charged together.
The application mainly has the following beneficial technical effects: the structure is simplified, the use is convenient, the detection efficiency is higher, and the operators are safer.
Drawings
Fig. 1 is a schematic block diagram of the present application.
Fig. 2 is a block diagram of the testing principle of the present application.
FIG. 3 is a schematic circuit diagram of a first portion of a main test loop as used in the present application.
FIG. 4 is a schematic circuit diagram of a second portion of the main test loop used in the present application.
Fig. 5 is a schematic diagram of a dc-to-dc ratio switching module and a first part of a wiring control section used in the present application.
Fig. 6 is a schematic diagram of a dc-to-dc ratio switching module and a second part of the wiring control section used in the present application.
Fig. 7 is a schematic diagram of a dc-to-dc ratio switching module and a third part of a connection control section used in the present application.
In fig. 1: m1-power supply module, M2-control module, M3-communication module, M4-test power supply module, M5-empty load switching module, M6-direct resistance ratio switching module, M7-ratio testing module, M8-direct current resistance testing module, M91-computer, M92-database; in FIG. 2: s1, starting, S2, checking main connection, S3, judging whether main connection exists, S4, testing high and low voltage direct resistance, S5, testing no load, S6, testing load, and S7, judging energy efficiency grade; in fig. 3 and 4: the left square frame represents a three-phase program control source, namely a test power supply module, 1-25 represent pins, an input A, an input B and an input C respectively represent the input of an A-phase power supply, a B-phase power supply and a C-phase power supply, an output A, an output B and an output C respectively represent the output of the A-phase power supply, an input N and an output N respectively represent input and output zero lines, a CT10 is a voltage compensation mutual inductor connected with the output A, a CT11 is a voltage compensation mutual inductor connected with the output B, a CT12 is a voltage compensation mutual inductor connected with the output C, S1 and S2 respectively represent output connection wires of each group of the CT10, the CT11 and the CT12, the S2 is connected together, the S1 of the CT10 is led out to form a compensation sampling la end, the low-voltage no-load induction switching control part is a contactor with three pairs of input and output ends, the low-voltage short-circuit switching control part is a contactor with three pairs of input and output ends, and the high-voltage load switching control part is a contactor with three pairs of input and output ends; in FIGS. 5-7: the low-voltage direct resistance ratio switching control component is a contactor with six pairs of input and output ends, the high-voltage direct resistance ratio switching control component is a contactor with six pairs of input and output ends, KM7-KM20 are control contactors, PLC < -direct resistance a +, PLC < -direct resistance B +, PLC < -direct resistance C + all represent control output ends with outputs connected to the PLC, PLC < -direct resistance a-, PLC < -direct resistance B-, PLC < -direct resistance C-all represent control output ends with outputs connected to the PLC, direct resistance a +, direct resistance B +, direct resistance C + respectively represent one ends connected with low-voltage side a, B, C, direct resistance a-, direct resistance B-, and direct resistance C-respectively represent the other ends connected with the low-voltage side a, B, C, P1 phi 24 represents an output end of a power supply module +24, PLC < -direct resistance A +, PLC < -direct resistance B +, PLC < -direct resistance C + respectively represent output ends connected to the PLC control output ends with the PLC, PLC < -direct resistance A-, B-, C-direct resistance, and PLC < -direct resistance C + respectively represent one ends connected with outputs connected with the high-voltage side A +, B-, C-, and C-direct resistance.
Detailed Description
Please refer to fig. 1 to 7, an energy efficiency intelligent apparatus for a distribution transformer, which comprises a power supply module M1, a control module M2, a communication module M3, a test power supply module M4, an empty load switching module M5, a direct resistance ratio switching module M6, a ratio testing module M7, a direct current resistance testing module M8, a computer M91, and a database M92, wherein the power supply module M1 supplies power to the control module M2 and the communication module M3, the control module M2 is used for controlling the empty load switching module M5, the direct resistance ratio switching module M6, the ratio testing module M7, and the direct current resistance testing module M8 to perform data transmission with the ratio testing module M7 and the direct current resistance testing module M8, the control module M2 and the communication module M3 can communicate with each other, the communication module M3 and the computer M91 can communicate with each other, the database M92 is installed in the computer M91, the test power supply module M4 supplies power to the empty load switching module M5, the alternating current utility power supply module M7, the ratio testing module M8, and the ratio testing module M91, and the computer.
The intelligent detection method for the energy efficiency of the distribution transformer by adopting the device comprises the following steps in sequence:
s1: starting;
s2: checking a main connection;
s3: judging whether the main connection exists or not, if not, prompting to switch to the main connection, otherwise, entering the next step;
s4: testing high-low voltage direct resistance, completing the direct resistance measurement of the high-voltage winding and the low-voltage winding through one-time wiring, and entering the next step after the testing is completed;
s5: carrying out no-load test, and entering the next step after the test is finished;
s6: carrying out a load test, and entering the next step after the test is finished;
s7: and judging the energy efficiency grade, namely judging the energy efficiency grade of the tested product according to the result of the no-load test.
The above-mentioned distribution transformer efficiency intelligent device, what its characterized in that experimental power module M4 provided does: the three-phase voltage adjustable between 0 and 800V is used for measuring no-load, and the test power supply module can be purchased in the market.
The energy efficiency intelligent device of the distribution transformer is characterized in that the empty load switching module M5 consists of a three-phase program control source, three voltage compensation transformers, three current transformers, a low-voltage no-load, induction switching control part, a high-voltage load switching control part and a low-voltage short-circuit switching control part, wherein a lead-out wire of an output A of the three-phase program control source is provided with one voltage compensation transformer which is called a first voltage compensation transformer and then connected in series with one current transformer which is called a first current transformer, the output end of the first current transformer is connected with the input end of a first switch of the low-voltage no-load and induction switching control part, and the output end of the first current transformer is connected with the output end of the first switch of the high-voltage load switching control part; a leading-out wire of an output B of the three-phase program control source is provided with a voltage compensation mutual inductor which is called a second voltage compensation mutual inductor and then connected in series with a current mutual inductor which is called a second current mutual inductor, the output end of the second current mutual inductor is connected with the input end of a second switch of the low-voltage no-load and induction switching control component, and the output end of the second current mutual inductor is connected with the output end of the second switch of the high-voltage load switching control component; a voltage compensation mutual inductor is arranged on a leading-out wire of an output C of the three-phase programmable source, the voltage compensation mutual inductor is called a third voltage compensation mutual inductor and then connected in series with a current mutual inductor, the current mutual inductor is called a third current mutual inductor, the output end of the second current mutual inductor is connected with the input end of a third switch of the low-voltage no-load and induction switching control component, and the output end of the third current mutual inductor is connected with the output end of the third switch of the high-voltage load switching control component; the output end of a first switch of the low-voltage no-load and induction switching control component is connected with an a end of the low-voltage side of the tested transformer, the output end of the first switch of the low-voltage no-load and induction switching control component is connected with the output end of a first switch of the low-voltage short-circuit switching control component, the output end of a second switch of the low-voltage no-load and induction switching control component is connected with a b end of the low-voltage side of the tested transformer, the output end of a second switch of the low-voltage no-load and induction switching control component is connected with the output end of a second switch of the low-voltage short-circuit switching control component, the output end of a third switch of the low-voltage no-load and induction switching control component is connected with the output end of a third switch of the low-voltage short-circuit switching control component, and the input end of the first switch of the low-voltage short circuit switching control component, the input end of the second switch of the low-voltage short circuit switching control component and the input end of the second switch of the low-voltage short circuit switching control component are connected together; the input end of the first switch of the high-voltage load switching control component is used for connecting with the A end of the high-voltage side of the tested transformer, the input end of the second switch of the high-voltage load switching control component is used for connecting with the B end of the high-voltage side of the tested transformer, and the input end of the first switch of the high-voltage load switching control component is used for connecting with the C end of the high-voltage side of the tested transformer.
The PLC in the application is Siemens, the model specification of the PLC is smart200, and the PLC can also be PLC of any other model specifications for realizing corresponding functions.
The energy efficiency intelligent device of the distribution transformer is characterized in that the PLC control module controls the actions of the low-voltage no-load, the induction switching control component, the high-voltage load switching control component and the low-voltage short-circuit switching control component.
Fig. 5 to 7 are actually connected together, and are separated due to a large influence, the six vertical lines on the left lower side in fig. 5 and the six vertical lines on the left upper side in fig. 6 are respectively connected, the four vertical lines on the left middle lower side in fig. 5 and the four vertical lines on the left middle upper side in fig. 6 are respectively connected, the four vertical lines on the right middle lower side in fig. 5 and the four vertical lines on the right middle upper side in fig. 6 are respectively connected, the six vertical lines on the right lower side in fig. 5 and the six vertical lines on the right upper side in fig. 6 are respectively connected, the six vertical lines on the left lower side in fig. 6 and the six vertical lines on the left upper side in fig. 7 are respectively connected, the two vertical lines on the left middle lower side in fig. 6 and the two vertical lines on the left middle upper side in fig. 7 are respectively connected, the two vertical lines on the right lower side in fig. 6 and the right upper side in fig. 7 are respectively connected, the two vertical lines on the left middle lower side in fig. 6 and the left upper side in fig. 7 are respectively connected, the right side in fig. 6 and the six vertical lines on the left side in turn are respectively connected, the right side in fig. 7 and the six vertical lines on the left side in fig. 6 and the left side: the low-voltage side comprises a C-phase current measuring line, a C-phase voltage measuring line, a B-phase current measuring line, a B-phase voltage measuring line, an a-phase current measuring line and an a-phase voltage measuring line, six rightmost vertical lines in the graphs of figures 5 to 7 sequentially comprise the C-phase voltage measuring line, the C-phase current measuring line, the B-phase voltage measuring line, the B-phase current measuring line, the A-phase voltage measuring line and the A-phase current measuring line from left to right, and four vertical lines in the left middle part below the lower part in the graph 5 sequentially comprise the following components: the positive output current I +, the negative output current I-, the positive output voltage U + and the negative output voltage U-are sequentially arranged from left to right in the four vertical lines at the right middle part below the lower part in the figure 5, wherein the four vertical lines are respectively arranged at the high-voltage winding of the direct resistance instrument: the negative output voltage U-, the positive output voltage U +, the negative output current I-, the positive output current I +, two vertical lines at the left middle part at the lower part in the figure 6 are sequentially arranged from left to right of a low-voltage winding of the direct resistance instrument: the negative output current I-, the negative output voltage U-, two vertical lines at the right middle part below the lower part in the figure 6 are sequentially arranged from left to right: negative output voltage U-, negative output current I-.
The above-mentioned energy efficiency intelligent device of distribution transformer is characterized in that the direct resistance ratio switching module M6 is composed of a low voltage direct resistance ratio switching control component and a high voltage direct resistance ratio switching control component, the low voltage direct resistance ratio switching control component is a contactor with six pairs of input and output ends, i.e. six switches, the input ends of the first pair of switches of the low voltage direct resistance ratio switching control component are connected with a c phase voltage measuring line, the output ends of the first pair of switches of the low voltage direct resistance ratio switching control component are connected with the c end of the low voltage side of the tested transformer, the input ends of the second pair of switches of the low voltage direct resistance ratio switching control component are connected with a c phase current measuring line, the output ends of the second pair of switches of the low voltage direct resistance ratio switching control component are connected with the c end of the low voltage side of the tested transformer, the input ends of the third pair of switches of the low voltage direct resistance ratio switching control component are connected with a b phase voltage measuring line, the output ends of a third pair of switches of the low-voltage direct-resistance ratio switching control component are connected with the b end of the low-voltage side of the tested transformer, the input ends of a fourth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a b phase current measuring line, the output ends of the fourth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with the b end of the low-voltage side of the tested transformer, the input ends of a fifth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with an a phase voltage measuring line, the output ends of a fifth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with an a end of the low-voltage side of the tested transformer, the input ends of a sixth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with an a phase current measuring line, and the output ends of a sixth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with an a end of the low-voltage side of the tested transformer; the high-voltage direct-resistance ratio switching control component is a contactor with six pairs of input and output ends, namely, six switches, the input ends of a first pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase current measuring line, the output end of a first pair of switches of the high-voltage direct-resistance ratio switching control component is connected with the C end on the high-voltage side of the tested transformer, the input ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase voltage measuring line, the output ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with the C end on the high-voltage side of the tested transformer, and the input ends of a third pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a B-phase current measuring line, the output ends of a third pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-B voltage measuring line, the output ends of the fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A current measuring line, the output ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer, the input ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A voltage measuring line, and the output ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer; the low-voltage direct-resistance transformation ratio switching control component and the high-voltage direct-resistance transformation ratio switching control component are controlled by the control module and act simultaneously, and the switch states at the same moment are the same, namely, the contactors are all switched on or off, and the switches are all normally open and can be closed after being electrified.
The above-mentioned distribution transformer energy efficiency intelligent device is characterized in that the transformation ratio testing module M7 comprises a transformer transformation ratio tester, a transformation ratio low-voltage side switching-on control module and a transformation ratio high-voltage side switching-on control module, the transformer transformation ratio tester is a transformer transformation ratio tester sold on the market and the model of which is XXF, the transformation ratio low-voltage side switching-on control module is a KM7 contactor, A1 of KM7 is grounded, A2 of KM7 is connected with an IO output end of the control module, the 1 st pin of KM7 is connected with a C-phase voltage measuring line, the 2 nd pin of KM7 is connected with a C-phase voltage measuring line, the 1 st pin of KM7 and the 2 nd pin of KM7 are a first pair of normally open switches of KM7 contactor, the 3 rd pin of KM7 is connected with a B-phase voltage measuring line, the 4 th pin of KM7 is connected with a B-phase voltage measuring line, the 3 rd pin of KM7 and the 4 th pin of KM7 are a second pair of KM7 are normally open switches of KM7, and a 5 th pin of KM7 is connected with a measuring line, the 6 th pin of KM7 is connected with the a end of the transformer transformation ratio tester, the 5 th pin of KM7 and the 6 th pin of KM7 are a third pair of normally open switches of a KM7 contactor, the first pair of normally open switches, the second pair of normally open switches and the third pair of normally open switches of the KM7 contactor are simultaneously switched on or simultaneously switched off, the transformation ratio high-voltage side switch-on control module is a KM8 contactor, A1 of KM8 is grounded, A2 of KM8 is connected with a second IO output end of the control module, the 2 nd pin of KM8 is connected with a C-phase voltage measuring line, the 1 st pin of KM8 is connected with the C end of the transformer transformation ratio tester, the 1 st pin of KM8 and the 2 nd pin of KM8 are the first pair of normally open switches of the KM8 contactor, the 4 th pin of KM8 is connected with a B-phase voltage measuring line, the 3 rd pin of KM8 is connected with the B end of the transformer transformation ratio tester, the 3 rd pin of KM8 and the 4 th pin of KM8 are a second pair of normally open switches of the KM8, and the 6 th pin of KM8 is connected with the A-phase voltage measuring line, the 5 th pin of KM8 connects with the A end of transformer transformation ratio tester, the 5 th pin of KM8 and the 6 th pin of KM8 are the third pair of normally open switches of KM8 contactor, and the first pair of normally open switches, the second pair of normally open switches and the third pair of normally open switches of KM8 contactor are switched on or off simultaneously.
In the production process of semi-finished products and finished products of power transformers, the newly installed transformers are required to be tested for the turn ratio or the voltage ratio before being put into operation and according to preventive test regulations of the State department of Electrical Power, and the correctness of the turn ratio of the transformers, the condition of tap switches, whether the transformers are in turn-to-turn short circuit or not and whether the transformers can be operated in parallel can be checked. The traditional transformation ratio bridge is not visual in reading, and only phase-by-phase measurement can be carried out to convert the reading. The XXF transformer transformation ratio tester overcomes the defects of the traditional transformation ratio bridge test, is simple, convenient and visual to operate, adopts a three-phase precise inverter power supply, and is quick in test and high in accuracy. The instrument has the following characteristics: A. the instrument adopts a three-phase precise inverter power supply instead of a single-phase mains supply as the measured voltage, thereby eliminating the harmonic influence of the mains supply voltage during measurement and ensuring more accurate measurement. When the working power supply is a generator, no influence is caused; B. three-phase output voltage is adopted, so that the testing speed is improved, the inter-phase included angle can be measured, and the transformer wiring group 0-11 can be automatically identified; C. the method is suitable for measuring a wide variety of transformers, in particular to the transformers of Z-type transformers, rectifier transformers, grounding transformers, electric furnace transformers, phase shift transformers and the like, and has the most comprehensive measurement parameters; D. the precise three-phase inverter power supply is adopted, so that high-low voltage reverse connection protection, transformer turn-to-turn short circuit protection, no-in-place protection of a tap switch, full short circuit protection of output and instrument stability are realized; E. after rated parameters are input, the transformer ratio value, the error value and the tap position of the tap switch can be automatically measured, particularly for tap switches with asymmetrical tapping, the accurate position of the tap switch of the transformer can be accurately measured, and the tap switches with 99 tap positions can be measured at most; F. the method adopts 7-inch high-definition color touch screen liquid crystal for modular display, chinese prompts exist in each operation step, a specification is not needed, and instrument operation can be completed only by looking at the liquid crystal prompts; G. the instrument can be externally connected with a printer to print measurement data, paperless office work is facilitated, and a cold-resistant temperature-resistant, sealed, waterproof, anti-falling, anti-vibration and multifunctional engineering plastic box is adopted, so that field test is facilitated. Therefore, the method can be directly used for measuring the transformer transformation ratio, and the applicant directly applies the method in the application, so that the development time and the development cost are saved.
The energy efficiency intelligent device of the distribution transformer is characterized in that the direct current resistance test module M8 consists of a wiring control part and a direct current resistance tester, and the direct current resistance tester is a hand-held direct current resistance tester sold in the market and having a model XXX 10C; the wiring control part comprises KM9, KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19 and KM20, wherein the KM9 to the KM20 are contactors, the low-voltage side of the wiring control part comprises KM9, KM10, KM11, KM12, KM13 and KM14, the 2 nd pin of KM9 is connected with a phase current measuring line a, the 1 st pin of KM9 is connected with I + of the low-voltage side of the direct current resistance tester, the 6 th pin of KM9 is connected with a phase voltage measuring line a, the 5 th pin of KM9 is connected with U + of the low-voltage side of the direct current resistance tester, the 14 th pin of KM9 is connected with a + of the PLC, the 13 th pin of KM9 is connected with the output end of a power supply module +24, and A1 of KM9 is connected with a + and A2 of KM9 is grounded; a2 nd pin of KM12 is connected with a phase current measuring line a, A1 st pin of KM12 is connected with I-on the low-voltage side of a direct current resistance tester, a 6 th pin of KM12 is connected with a phase voltage measuring line a, a 5 th pin of KM12 is connected with U-on the low-voltage side of the direct current resistance tester, a 14 th pin of KM12 is connected with a direct resistance a-of PLC, a 13 th pin of KM12 is connected with the output end of a power supply module +24, A1 of KM12 is connected with a direct resistance a-, and A2 of KM12 is grounded; a2 nd pin of KM10 is connected with a b-phase current measuring line, A1 st pin of KM10 is connected with I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM10 is connected with a b-phase voltage measuring line, a 5 th pin of KM10 is connected with U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM10 is connected with a direct resistance b + of PLC, a 13 th pin of KM10 is connected with an output end of a power supply module +24, A1 of KM10 is connected with the direct resistance b +, and A2 of KM10 is grounded; a2 nd pin of KM13 is connected with a b-phase current measuring line, A1 st pin of KM13 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of KM13 is connected with a b-phase voltage measuring line, a 5 th pin of KM13 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of KM13 is connected with a direct resistance b-of PLC, a 13 th pin of KM13 is connected with an output end of a power supply module +24, an A1 of KM13 is connected with a direct resistance b-, and an A2 of KM13 is grounded; a2 nd pin of KM11 is connected with a c-phase current measuring line, A1 st pin of KM11 is connected with an I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM11 is connected with a c-phase voltage measuring line, a 5 th pin of KM11 is connected with a U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM11 is connected with a direct resistance c + of PLC, a 13 th pin of KM11 is connected with an output end of a power supply module +24, and an A1 of KM11 is connected with the direct resistance c + and an A2 of KM11 is grounded; a2 nd pin of KM14 is connected with a c-phase current measuring line, A1 st pin of KM14 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of KM14 is connected with a c-phase voltage measuring line, a 5 th pin of KM14 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of KM14 is connected with a direct resistance c-of PLC, a 13 th pin of KM14 is connected with an output end of a power supply module +24, A1 of KM14 is connected with the direct resistance c-, and A2 of KM14 is grounded; the high-voltage side of the wiring control part consists of KM15, KM16, KM17, KM18, KM19 and KM20, the 2 nd pin of KM15 is connected with an A-phase current measuring line, the 1 st pin of KM15 is connected with I + of the high-voltage side of a direct-current resistance tester, the 6 th pin of KM15 is connected with an A-phase voltage measuring line, the 5 th pin of KM15 is connected with U + of the high-voltage side of the direct-current resistance tester, the 14 th pin of KM15 is connected with a direct resistance A + of PLC, the 13 th pin of KM15 is connected with the output end of a power supply module +24, and the A1 of KM15 is connected with a direct resistance A + and the A2 of KM15 is grounded; a2 nd pin of KM18 is connected with an A-phase current measuring line, A1 st pin of KM18 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM18 is connected with an A-phase voltage measuring line, a 5 th pin of KM18 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM18 is connected with a direct resistance A-of PLC, a 13 th pin of KM18 is connected with an output end of a power supply module +24, and an A1 of KM18 is connected with a direct resistance A-, and an A2 of KM18 is grounded; a2 nd pin of KM16 is connected with a B phase current measuring wire, A1 st pin of KM16 is connected with I + at the high-voltage side of a direct current resistance tester, a 6 th pin of KM16 is connected with a B phase voltage measuring wire, a 5 th pin of KM16 is connected with U + at the high-voltage side of the direct current resistance tester, a 14 th pin of KM16 is connected with a direct resistance B + of PLC, a 13 th pin of KM16 is connected with an output end of a power supply module +24, A1 of KM16 is connected with the direct resistance B +, and A2 of KM16 is grounded; a2 nd pin of KM19 is connected with a B-phase current measuring line, A1 st pin of KM19 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM19 is connected with a B-phase voltage measuring line, a 5 th pin of KM19 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM19 is connected with a direct resistance B-of PLC, a 13 th pin of KM19 is connected with an output end of a power supply module +24, an A1 of KM19 is connected with a direct resistance B-, and an A2 of KM19 is grounded; a2 nd pin of KM17 is connected with a C-phase current measuring line, A1 st pin of KM17 is connected with an I + at the high-voltage side of a direct-current resistance tester, a 6 th pin of KM17 is connected with a C-phase voltage measuring line, a 5 th pin of KM17 is connected with a U + at the high-voltage side of the direct-current resistance tester, a 14 th pin of KM17 is connected with a direct resistance C + of PLC, a 13 th pin of KM17 is connected with an output end of a power supply module +24, and an A1 of KM17 is connected with the direct resistance C + and an A2 of KM17 is grounded; a2 nd pin of the KM20 is connected with a C-phase current measuring line, A1 st pin of the KM20 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM20 is connected with a C-phase voltage measuring line, a 5 th pin of the KM20 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM20 is connected with a direct resistance C-of the PLC, a 13 th pin of the KM20 is connected with an output end of a power supply module +24, an A1 of the KM20 is connected with the direct resistance C-, and an A2 of the KM20 is grounded; a pair of normally open switches are formed between the 1 st pin and the 2 nd pin of KM9, between the 5 th pin and the 6 th pin of KM7, and between the 13 th pin and the 14 th pin of KM 7; the same applies to KM10-KM20, i.e. KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19, KM20 are: a pair of normally open switches is formed between the 1 st pin and the 2 nd pin, a pair of normally open switches is formed between the 5 th pin and the 6 th pin, and a pair of normally open switches is formed between the 13 th pin and the 14 th pin; during testing, KM9 and KM13, KM10 and KM14, KM11 and KM12 are sequentially put into the low-pressure side, and KM15 and KM19, KM16 and KM20, KM17 and KM18 are sequentially put into the high-pressure side; KM9 and KM13 are charged together with KM15 and KM19, KM10 and KM14 are charged together with KM16 and KM20, and KM11 and KM12 and KM17 and KM18 are charged together.
The direct resistance a of the PLC, the direct resistance b of the PLC, the direct resistance c of the PLC, the direct resistance A of the PLC, and the direct resistance A of the PLC refer to input and output points of the PLC, namely IO points of the PLC, as long as enough IO points exist, manual designation can be carried out, and only two parts of the IO points are different from each other; the direct resistance a +, the direct resistance B +, the direct resistance C +, the direct resistance a-, the direct resistance B-, the direct resistance C-, the direct resistance A +, the direct resistance B +, the direct resistance C +, the direct resistance A-, the direct resistance B-and the direct resistance C-refer to ports of each phase of the three-phase transformer respectively, each phase has two ports, one is positive, the other is negative, a capital letter is arranged on a high-voltage side, and a small letter is arranged on a low-voltage side.
The direct resistance ratio switching module in this application can also be called as conversion circuit for intelligent detection, and the wiring control part of the direct resistance testing module in this application can also be called as conversion circuit for intelligent detection.
The direct current resistance of the transformer is a necessary test item for semi-finished products, finished product delivery tests, installation, overhaul, change of tap switches, handover tests and preventive tests of a power department in transformer manufacturing. The welding quality of the winding joint and the existence of turn-to-turn short circuit of the winding can be checked, and the conditions that whether the contact of each position of the voltage tap switch is good, whether the actual position of the tap switch is consistent with the indication position, whether the outgoing line is broken, whether multiple strands of wires are wound in parallel, whether the strands are broken and the like can be detected. In order to meet the requirement of rapid measurement of the direct current resistance of the transformer, a domestic XXX10C handheld direct current resistance tester adopts a brand-new power supply technology, and has the characteristics of small volume, light weight, large output current, good repeatability, strong anti-interference capability, perfect protection function and the like. The whole machine is controlled by a high-speed single chip microcomputer, the automation degree is high, and the automatic discharge alarm device has the functions of automatic discharge and discharge alarm. The instrument has high test precision and simple and convenient operation, and can realize the rapid measurement of the direct resistance of the transformer. Therefore, the method can be directly used for measuring the direct-current resistance of the transformer, and the applicant directly applies the method in the application, so that the development time and the development cost are saved.
The main connection verification is automatically verified by a device, under an ideal condition, if a single-phase transformer is provided with two input ends and two output ends, the transformation ratio is the turn ratio and is also equal to the voltage ratio, but deviation can be caused due to various reasons, for example, when the transformation ratio is 25, the output of a low-voltage side is 400V when 10kV is input to a high-voltage side, and the ideal condition can not be achieved when deviation is caused, then a tap is set for adjustment, certainly, the tap is not set, and under the condition, before the direct current resistance of a high-voltage winding and a low-voltage winding is measured, or before the direct resistance of the high-voltage winding and the low-voltage winding is measured, the transformation ratio must be measured firstly.
In the application, the database is installed in the computer, the test result can be transmitted into the database of the computer through the communication module, in addition, the test report can be printed through the computer, and the test report can form the structural form of the template.
The three-phase program control source can be purchased in the market, such as DGDY-3H.
In the present application, the types of KM7-KM20 are LC1D09M7C.
In this application, through switching control, when doing the no-load test, the transformer high-voltage side can reach the highest 11kV line voltage level, when doing the no-load test, no longer need the artifical test wire that removes the high-voltage side, and direct resistance, no-load and load test can once be worked a telephone switchboard and accomplish, and automatic switching device promotes the efficiency of having tested. The switching action of the output of the current channel, the voltage channel and the program control source of the direct current resistance tester and the terminal of the high-voltage side or the low-voltage side of the tested object is realized by adopting the switch switching array. The no-load test is put into a low-voltage no-load and induction switching module, and a high-voltage load switching module and a low-voltage short-circuit switching module are disconnected; the load test is put into high-voltage load switching and low-voltage short-circuit switching, and the low-voltage no-load and induction switching module is disconnected; the transformer is unloaded (90% and 110% unloaded), the low-voltage side is required to be pressurized by an induction test, and the high-voltage side is open-circuited; the transformer load test requires pressurization at a high-voltage side and short circuit at a low-voltage side; the modules of low-voltage no-load, induction switching, high-voltage load switching and low-voltage short-circuit switching can be understood as switching elements; during no-load test, the PLC controls the 'low-voltage no-load and induction switching' to be closed, the 'high-voltage load switching' and the 'low-voltage short-circuit switching' to be disconnected, and therefore the output of the test power supply is conducted with the abc terminal of the low-voltage side of the transformer. Controlling the test power supply to boost voltage, measuring the current of the test loop through a current transformer, introducing the current into a current measurement channel of a power analyzer, and directly introducing the voltage of the test loop into a voltage measurement channel of the power analyzer; during a load test, the PLC controls the 'high-voltage load switching' and the 'low-voltage short-circuit switching' to be closed and the 'low-voltage no-load and induction switching' to be disconnected, so that the output of a test power supply is conducted with the ABC terminal of the high-voltage side of the transformer, and the ABC terminal of the low-voltage side of the transformer is short-circuited; and then controlling the test power supply to boost voltage, measuring the current of the test loop through the current transformer, introducing the current into a current measuring channel of the power analyzer, and directly introducing the voltage of the test loop into a voltage measuring channel of the power analyzer. When the direct resistance transformation ratio is switched: a direct resistance transformation ratio switching module is put in, KM9 and KM13, KM10 and KM14, KM11 and KM12 are put in sequence on the low-voltage side, KM15 and KM19, KM16 and KM20, KM17 and KM18 are put in sequence on the high-voltage side, and AB/BC/CA line resistance is measured respectively; and automatically acquiring a test result through PLC upper computer software, and judging whether the test is qualified. The direct current resistance test adopts a two-point four-wire method, so that I +, I-, U +, U-and transformer direct current resistance test needs to test RAB, RBC, RCA, RAB, RBC and RCA; when the test of #2 is completed by one-time wiring, the (I +, U +) (I-, U-) can be conducted with (A) (B), (B) (C), (C) (A), (a) (B), (B) (C) and (C) (a) respectively; the KM9 to the KM20 are all controlled by a PLC, the KM9-KM14 is responsible for low-voltage side direct resistance switching, and the KM15-KM20 is responsible for high-voltage side direct resistance switching; taking (a) (b) as an example, the PLC controls KM9 and KM13 to be closed, and the others to be opened, so that I + and U + of the impedance meter are conducted to the low-voltage side terminal a of the transformer, and I-and U-are conducted to the low-voltage side terminal b of the transformer. And starting the direct resistance meter to test to obtain a test result. And the rest is analogized. Transformation ratio: the transformation ratio test adopts a transformer transformation ratio tester, and the instrument provides six output terminals of ABCAbc; in the transformation ratio test, the ABCAbc terminals are required to be connected to six terminals of a transformer ABCAbbc respectively; the PLC controls KM7 to be closed, and the rest are opened, so that the ABCabc of the transformation ratio is conducted with the ABCabc of the transformer. And starting a transformation ratio instrument for testing to obtain a test result. The detection requirements of the capacity transformer with the voltage level of 10kV and the rated capacity of 800kVA or below are met. And (3) carrying out big data analysis aiming at the energy efficiency detection result data of the mass distribution transformer, and carrying out multi-dimensional evaluation and prediction on the quality of the current materials and the capability of suppliers. The energy efficiency grade judgment is realized in a table look-up mode, a table is recorded in advance, and the corresponding energy efficiency grade can be judged when test data fall into a corresponding range. The device structure that uses in this application is retrencied, and convenient to use, detection are high-efficient. The control operation of the test system is completed based on a PLC and a computer software interactive interface, test items can be automatically completed through the optimized design of software, and a data management system is introduced, so that the test results of all the test items can be automatically stored and test reports can be automatically generated, the tedious operations of recording, inputting and the like of testers are avoided, and the detection efficiency is improved.
The application mainly has the following beneficial technical effects: the structure is simplified, the use is convenient, the detection efficiency is higher, and the operating personnel are safer.
The above-described embodiments are merely preferred technical solutions of the present application, and should not be construed as limiting the present application. The protection scope of the present application shall be defined by the claims and equivalents thereof including technical features described in the claims. I.e., equivalent alterations and modifications within the scope of the invention, are also intended to be covered by the scope of this invention.
Claims (8)
1. The utility model provides a distribution transformer efficiency intelligent device, its characterized in that has power module (M1), control module (M2), communication module (M3), experimental power module (M4), empty load switches module (M5), direct resistance transformation ratio switches module (M6), transformation ratio test module (M7), direct current resistance test module (M8), computer (M91), database (M92), power module (M1) supplies to control module (M2) and communication module (M3) electric power, control module (M2) are used for controlling empty load switches module (M5), direct resistance transformation ratio switches module (M6), transformation ratio test module (M7), the action of direct current resistance test module (M8) and with transformation ratio test module (M7), carry out data transmission between direct current resistance test module (M8), control module (M2) and communication module (M3) can communicate each other, communication module (M3) and computer (M91) can communicate each other, database (M92) are installed in computer (M91) the power module (M91), alternating current resistance switches module (M5) and supplies to the test module (M7), alternating current resistance test module (M5) supplies to the power.
2. The intelligent energy efficiency device of the distribution transformer according to claim 1, characterized in that the test power module (M4) provides: the line voltage is adjustable three-phase voltage between 0 and 800V.
3. The distribution transformer energy efficiency intelligent device according to claim 1, characterized in that the empty load switching module (M5) is composed of a three-phase program control source, three voltage compensation transformers, three current transformers, a low voltage no-load, an induction switching control component, a high voltage load switching control component and a low voltage short circuit switching control component, wherein a leading-out line of an output A of the three-phase program control source is provided with one voltage compensation transformer, which is called a first voltage compensation transformer, and then connected in series with one current transformer, which is called a first current transformer, an output end of the first current transformer is connected with a first switch input end of the low voltage no-load, induction switching control component, and an output end of the first current transformer is connected with an output end of a first switch of the high voltage load switching control component; a leading-out wire of an output B of the three-phase program control source is provided with a voltage compensation mutual inductor which is called a second voltage compensation mutual inductor and then connected in series with a current mutual inductor which is called a second current mutual inductor, the output end of the second current mutual inductor is connected with the input end of a second switch of the low-voltage no-load and induction switching control component, and the output end of the second current mutual inductor is connected with the output end of the second switch of the high-voltage load switching control component; a voltage compensation mutual inductor is arranged on a leading-out wire of an output C of the three-phase programmable source, the voltage compensation mutual inductor is called a third voltage compensation mutual inductor and then connected in series with a current mutual inductor, the current mutual inductor is called a third current mutual inductor, the output end of the second current mutual inductor is connected with the input end of a third switch of the low-voltage no-load and induction switching control component, and the output end of the third current mutual inductor is connected with the output end of the third switch of the high-voltage load switching control component; the output end of a first switch of the low-voltage no-load and induction switching control component is connected with the end a of the low-voltage side of the tested transformer, the output end of the first switch of the low-voltage no-load and induction switching control component is connected with the output end of the first switch of the low-voltage short-circuit switching control component, the output end of a second switch of the low-voltage no-load and induction switching control component is connected with the end b of the low-voltage side of the tested transformer, the output end of the second switch of the low-voltage no-load and induction switching control component is connected with the output end of the second switch of the low-voltage short-circuit switching control component, the output end of the third switch of the low-voltage no-load and induction switching control component is connected with the output end of the third switch of the low-voltage short-circuit switching control component, and the input ends of the first switch, the second switch and the second switch of the low-voltage short circuit switching control component are connected together; the input end of the first switch of the high-voltage load switching control component is used for connecting with the A end of the high-voltage side of the tested transformer, the input end of the second switch of the high-voltage load switching control component is used for connecting with the B end of the high-voltage side of the tested transformer, and the input end of the first switch of the high-voltage load switching control component is used for connecting with the C end of the high-voltage side of the tested transformer.
4. The distribution transformer energy efficiency intelligent device according to claim 1, characterized in that the direct resistance ratio switching module (M6) is composed of a low voltage direct resistance ratio switching control component and a high voltage direct resistance ratio switching control component, the low voltage direct resistance ratio switching control component is a contactor with six pairs of input and output terminals, the input ends of a first pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a c-phase voltage measuring line, the output ends of the first pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a c end on the low-voltage side of a tested transformer, the input ends of a second pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a c end on the low-voltage side of the tested transformer, the output ends of the second pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a c end on the low-voltage side of the tested transformer, the input ends of a third pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a b-phase voltage measuring line, the output ends of a fourth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a-phase voltage measuring line, the output ends of a fifth pair of switches of the low-voltage direct-resistance ratio switching control component are connected with a end on the low-voltage side of the tested transformer, and the input ends of a phase voltage direct-resistance ratio switching control component are connected with a phase voltage measuring line of the sixth pair of the tested transformer; the high-voltage direct-resistance ratio switching control component is a contactor with six pairs of input and output ends, namely, six switches, the input ends of a first pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase current measuring line, the output end of a first pair of switches of the high-voltage direct-resistance ratio switching control component is connected with the C end on the high-voltage side of the tested transformer, the input ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase voltage measuring line, the output ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with the C end on the high-voltage side of the tested transformer, and the input ends of a third pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a B-phase current measuring line, the output ends of a third pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-B voltage measuring line, the output ends of the fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A current measuring line, the output ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer, the input ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A voltage measuring line, and the output ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer; the low-voltage direct-resistance transformation ratio switching control component and the high-voltage direct-resistance transformation ratio switching control component are controlled by the control module and act simultaneously, and the switch states at the same moment are the same, namely, the contactors are all switched on or off, and the switches are all normally open and can be closed after being electrified.
5. The energy-efficient intelligent device of claim 1, wherein the transformation ratio testing module (M7) comprises a transformer transformation ratio tester, a transformation ratio low-voltage side switch-on control module and a transformation ratio high-voltage side switch-on control module, the transformer transformation ratio tester is a transformer transformation ratio tester sold in the market as model XXF, the transformation ratio low-voltage side switch-on control module is a KM7 contactor, A1 of KM7 is grounded, A2 of KM7 is connected with an IO output end of the control module, 1 st pin of KM7 is connected with a C-phase voltage measuring line, 2 nd pin of KM7 is connected with a C-end of the transformer transformation ratio tester, 1 st pin of KM7 and 2 nd pin of KM7 are a first pair of normally open switches of KM7 contactor, 3 rd pin of KM7 is connected with a B-phase voltage measuring line, 4 th pin of KM7 is connected with a B-end of the transformer transformation ratio tester, 3 rd pin of KM7 and 4 th pin of KM7 are a second pair of normally open switches of KM7 contactor, the 5 th pin of KM7 is connected with a phase voltage measuring line a, the 6 th pin of KM7 is connected with the a end of a transformer transformation ratio tester, the 5 th pin of KM7 and the 6 th pin of KM7 are a third pair of normally open switches of a KM7 contactor, the first pair of normally open switches, the second pair of normally open switches and the third pair of normally open switches of the KM7 contactor are simultaneously switched on or simultaneously switched off, the transformation ratio high-voltage side switching control module is a KM8 contactor, A1 of KM8 is grounded, A2 of KM8 is connected with a second IO output end of the control panel, the 2 nd pin of KM8 is connected with a phase voltage measuring line C, the 1 st pin of KM8 is connected with the C end of the transformer transformation ratio tester, the 1 st pin of KM8 and the 2 nd pin of KM8 are a first pair of switches of the KM8 contactor, the 4 th pin of KM8 is connected with a phase voltage measuring line B, the 3 rd pin of KM8 is connected with the B end of the transformer transformation ratio tester, the 3 rd pin of KM8 and the 4 th pin are a second pair of KM8 contactor, the 6 th pin of KM8 connects A looks voltage measurement line, and the 5 th pin of KM8 connects the A end of transformer transformation ratio tester, and the 5 th pin of KM8 and the 6 th pin of KM8 are the third pair of normally open switches of KM8 contactor, and the first pair of normally open switch, the second pair of normally open switch, the third pair of normally open switch of KM8 contactor are put through simultaneously or are disconnected simultaneously.
6. The energy efficiency intelligent device of the distribution transformer according to claim 1, characterized in that the direct current resistance test module (M8) is composed of a wiring control part and a direct current resistance tester, wherein the direct current resistance tester is a hand-held direct current resistance tester sold in the market, and the model of the hand-held direct current resistance tester is XXX 10C; the wiring control part comprises KM9, KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19 and KM20, wherein the KM9 to the KM20 are contactors, the low-voltage side of the wiring control part comprises KM9, KM10, KM11, KM12, KM13 and KM14, the 2 nd pin of KM9 is connected with a phase current measuring line a, the 1 st pin of KM9 is connected with I + of the low-voltage side of the direct current resistance tester, the 6 th pin of KM9 is connected with a phase voltage measuring line a, the 5 th pin of KM9 is connected with U + of the low-voltage side of the direct current resistance tester, the 14 th pin of KM9 is connected with a + of the PLC, the 13 th pin of KM9 is connected with the output end of a power supply module +24, and A1 of KM9 is connected with a + and A2 of KM9 is grounded; a2 nd pin of KM12 is connected with a phase current measuring line a, A1 st pin of KM12 is connected with I-at the low-voltage side of a direct current resistance tester, a 6 th pin of KM12 is connected with a phase voltage measuring line a, a 5 th pin of KM12 is connected with U-at the low-voltage side of the direct current resistance tester, a 14 th pin of KM12 is connected with a direct resistance a-of PLC, a 13 th pin of KM12 is connected with the output end of a power supply module +24, A1 of KM12 is connected with the direct resistance a-, and A2 of KM12 is grounded; a2 nd pin of KM10 is connected with a b-phase current measuring line, A1 st pin of KM10 is connected with an I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM10 is connected with a b-phase voltage measuring line, a 5 th pin of KM10 is connected with a U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM10 is connected with a direct resistance b + of PLC, a 13 th pin of KM10 is connected with an output end of a power supply module +24, and an A1 of KM10 is connected with a direct resistance b + and an A2 of KM10 is grounded; a2 nd pin of KM13 is connected with a b-phase current measuring line, A1 st pin of KM13 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of KM13 is connected with a b-phase voltage measuring line, a 5 th pin of KM13 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of KM13 is connected with a direct resistance b-of PLC, a 13 th pin of KM13 is connected with an output end of a power supply module +24, an A1 of KM13 is connected with a direct resistance b-, and an A2 of KM13 is grounded; a2 nd pin of KM11 is connected with a c-phase current measuring wire, A1 st pin of KM11 is connected with I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM11 is connected with a c-phase voltage measuring wire, a 5 th pin of KM11 is connected with U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM11 is connected with a direct resistance c + of PLC, a 13 th pin of KM11 is connected with an output end of a power supply module +24, A1 of KM11 is connected with the direct resistance c +, and A2 of KM11 is grounded; a2 nd pin of the KM14 is connected with a c-phase current measuring line, A1 st pin of the KM14 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of the KM14 is connected with a c-phase voltage measuring line, a 5 th pin of the KM14 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of the KM14 is connected with a direct resistance c-of the PLC, a 13 th pin of the KM14 is connected with an output end of the power supply module +24, A1 of the KM14 is connected with a direct resistance c-, and A2 of the KM14 is grounded; the high-voltage side of the wiring control part consists of KM15, KM16, KM17, KM18, KM19 and KM20, the 2 nd pin of KM15 is connected with an A-phase current measuring line, the 1 st pin of KM15 is connected with I + of the high-voltage side of a direct-current resistance tester, the 6 th pin of KM15 is connected with an A-phase voltage measuring line, the 5 th pin of KM15 is connected with U + of the high-voltage side of the direct-current resistance tester, the 14 th pin of KM15 is connected with a direct resistance A + of PLC, the 13 th pin of KM15 is connected with the output end of a power supply module +24, and the A1 of KM15 is connected with a direct resistance A + and the A2 of KM15 is grounded; a2 nd pin of the KM18 is connected with an A phase current measuring line, A1 st pin of the KM18 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM18 is connected with an A phase voltage measuring line, a 5 th pin of the KM18 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM18 is connected with a direct resistance A-of the PLC, a 13 th pin of the KM18 is connected with an output end of the power supply module +24, A1 of the KM18 is connected with a direct resistance A-, and A2 of the KM18 is grounded; a2 nd pin of KM16 is connected with a B-phase current measuring line, A1 st pin of KM16 is connected with an I + at the high-voltage side of a direct-current resistance tester, a 6 th pin of KM16 is connected with a B-phase voltage measuring line, a 5 th pin of KM16 is connected with a U + at the high-voltage side of the direct-current resistance tester, a 14 th pin of KM16 is connected with a direct resistance B + of PLC, a 13 th pin of KM16 is connected with an output end of a power supply module +24, and an A1 of KM16 is connected with the direct resistance B + and an A2 of KM16 is grounded; a2 nd pin of KM19 is connected with a B-phase current measuring line, A1 st pin of KM19 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM19 is connected with a B-phase voltage measuring line, a 5 th pin of KM19 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM19 is connected with a direct resistance B-of PLC, a 13 th pin of KM19 is connected with an output end of a power supply module +24, an A1 of KM19 is connected with a direct resistance B-, and an A2 of KM19 is grounded; a2 nd pin of KM17 is connected with a C-phase current measuring line, A1 st pin of KM17 is connected with an I + at the high-voltage side of a direct-current resistance tester, a 6 th pin of KM17 is connected with a C-phase voltage measuring line, a 5 th pin of KM17 is connected with a U + at the high-voltage side of the direct-current resistance tester, a 14 th pin of KM17 is connected with a direct resistance C + of PLC, a 13 th pin of KM17 is connected with an output end of a power supply module +24, and an A1 of KM17 is connected with the direct resistance C + and an A2 of KM17 is grounded; a2 nd pin of the KM20 is connected with a C-phase current measuring line, A1 st pin of the KM20 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM20 is connected with a C-phase voltage measuring line, a 5 th pin of the KM20 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM20 is connected with a direct resistance C-of the PLC, a 13 th pin of the KM20 is connected with an output end of a power supply module +24, an A1 of the KM20 is connected with the direct resistance C-, and an A2 of the KM20 is grounded; a pair of normally open switches are formed between the 1 st pin and the 2 nd pin of KM9, between the 5 th pin and the 6 th pin of KM7, and between the 13 th pin and the 14 th pin of KM 7; the same applies to KM10-KM20, i.e. KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19, KM20 are: a pair of normally open switches is formed between the 1 st pin and the 2 nd pin, a pair of normally open switches is formed between the 5 th pin and the 6 th pin, and a pair of normally open switches is formed between the 13 th pin and the 14 th pin; during testing, KM9 and KM13, KM10 and KM14, KM11 and KM12 are sequentially put into the low-pressure side, and KM15 and KM19, KM16 and KM20, KM17 and KM18 are sequentially put into the high-pressure side; KM9 and KM13 were charged together with KM15 and KM19, KM10 and KM14 were charged together with KM16 and KM20, and KM11 and KM12 and KM17 and KM18 were charged together.
7. A switching circuit for intelligently detecting the energy efficiency of a distribution transformer is composed of a low-voltage direct-resistance transformation ratio switching control component and a high-voltage direct-resistance transformation ratio switching control component, and is characterized in that the low-voltage direct-resistance transformation ratio switching control component is a contactor with six pairs of input and output ends, namely six switches, the input ends of a first pair of switches of the low-voltage direct-resistance transformation ratio switching control component are connected with a c-phase voltage measuring line, the output end of a first pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with the c end of the low-voltage side of a tested transformer, the input end of a third pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with a b-phase voltage measuring line, the output end of a third pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with the b end of the low-voltage side of the tested transformer, the input end of a fourth pair of switches of the low-voltage direct-resistance transformation ratio switching control component is connected with a end of the low-voltage side of the tested transformer, the input end of the fifth pair of the low-voltage direct-resistance transformation ratio switching control component is connected with a measured end of the low-voltage side of the tested transformer, and the input end of the low-voltage direct-resistance transformation ratio switching control component is connected with a measured by the fifth pair of the low-voltage phase voltage side of the tested transformer; the high-voltage direct-resistance ratio switching control component is a contactor with six pairs of input and output ends, namely, six switches, the input ends of a first pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase current measuring line, the output end of a first pair of switches of the high-voltage direct-resistance ratio switching control component is connected with the C end on the high-voltage side of the tested transformer, the input ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a C-phase voltage measuring line, the output ends of a second pair of switches of the high-voltage direct-resistance ratio switching control component are connected with the C end on the high-voltage side of the tested transformer, and the input ends of a third pair of switches of the high-voltage direct-resistance ratio switching control component are connected with a B-phase current measuring line, the output ends of a third pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-B voltage measuring line, the output ends of the fourth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end B on the high-voltage side of the tested transformer, the input ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A current measuring line, the output ends of a fifth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer, the input ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with a phase-A voltage measuring line, and the output ends of a sixth pair of switches of the high-voltage direct-resistance transformation ratio switching control component are connected with the end A on the high-voltage side of the tested transformer; the low-voltage direct-resistance transformation ratio switching control component and the high-voltage direct-resistance transformation ratio switching control component are controlled by the control module and act simultaneously, and the switch states at the same moment are the same, namely, the contactors are all switched on or off, and the switches are all normally open and can be closed after being electrified.
8. A conversion circuit for energy efficiency intelligent detection of a distribution transformer is composed of a wiring control part and is characterized in that the wiring control part is composed of KM9, KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19 and KM20, wherein the KM9 to KM20 are contactors, the low-voltage side of the wiring control part is composed of KM9, KM10, KM11, KM12, KM13 and KM14, the 2 nd pin of KM9 is connected with an a-phase current measuring line, the 1 st pin of KM9 is connected with the I + at the low-voltage side of a direct current resistance tester, the 6 th pin of KM9 is connected with an a-phase voltage measuring line, the 5 th pin of KM9 is connected with the U + at the low-voltage side of the direct current resistance tester, the 14 th pin of KM9 is connected with the direct resistance a + at the low-voltage side of PLC, the 13 th pin of KM9 is connected with the output end of a power supply module +24, and the A1 of KM9 is connected with a + and the ground; a2 nd pin of KM12 is connected with a phase current measuring line a, A1 st pin of KM12 is connected with I-on the low-voltage side of a direct current resistance tester, a 6 th pin of KM12 is connected with a phase voltage measuring line a, a 5 th pin of KM12 is connected with U-on the low-voltage side of the direct current resistance tester, a 14 th pin of KM12 is connected with a direct resistance a-of PLC, a 13 th pin of KM12 is connected with the output end of a power supply module +24, A1 of KM12 is connected with a direct resistance a-, and A2 of KM12 is grounded; a2 nd pin of KM10 is connected with a b-phase current measuring line, A1 st pin of KM10 is connected with I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM10 is connected with a b-phase voltage measuring line, a 5 th pin of KM10 is connected with U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM10 is connected with a direct resistance b + of PLC, a 13 th pin of KM10 is connected with an output end of a power supply module +24, A1 of KM10 is connected with the direct resistance b +, and A2 of KM10 is grounded; a2 nd pin of KM13 is connected with a b-phase current measuring line, A1 st pin of KM13 is connected with I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of KM13 is connected with a b-phase voltage measuring line, a 5 th pin of KM13 is connected with U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of KM13 is connected with a direct resistance b-of PLC, a 13 th pin of KM13 is connected with the output end of a power supply module +24, A1 of KM13 is connected with a direct resistance b-, and A2 of KM13 is grounded; a2 nd pin of KM11 is connected with a c-phase current measuring wire, A1 st pin of KM11 is connected with I + at the low-voltage side of a direct-current resistance tester, a 6 th pin of KM11 is connected with a c-phase voltage measuring wire, a 5 th pin of KM11 is connected with U + at the low-voltage side of the direct-current resistance tester, a 14 th pin of KM11 is connected with a direct resistance c + of PLC, a 13 th pin of KM11 is connected with an output end of a power supply module +24, A1 of KM11 is connected with the direct resistance c +, and A2 of KM11 is grounded; a2 nd pin of the KM14 is connected with a c-phase current measuring line, A1 st pin of the KM14 is connected with an I-on the low-voltage side of a direct-current resistance tester, a 6 th pin of the KM14 is connected with a c-phase voltage measuring line, a 5 th pin of the KM14 is connected with a U-on the low-voltage side of the direct-current resistance tester, a 14 th pin of the KM14 is connected with a direct resistance c-of the PLC, a 13 th pin of the KM14 is connected with an output end of the power supply module +24, A1 of the KM14 is connected with a direct resistance c-, and A2 of the KM14 is grounded; the high-voltage side of the wiring control part consists of KM15, KM16, KM17, KM18, KM19 and KM20, the 2 nd pin of KM15 is connected with an A-phase current measuring line, the 1 st pin of KM15 is connected with I + of the high-voltage side of a direct-current resistance tester, the 6 th pin of KM15 is connected with an A-phase voltage measuring line, the 5 th pin of KM15 is connected with U + of the high-voltage side of the direct-current resistance tester, the 14 th pin of KM15 is connected with a direct resistance A + of PLC, the 13 th pin of KM15 is connected with the output end of a power supply module +24, and the A1 of KM15 is connected with a direct resistance A + and the A2 of KM15 is grounded; a2 nd pin of KM18 is connected with an A-phase current measuring line, A1 st pin of KM18 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM18 is connected with an A-phase voltage measuring line, a 5 th pin of KM18 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM18 is connected with a direct resistance A-of PLC, a 13 th pin of KM18 is connected with an output end of a power supply module +24, and an A1 of KM18 is connected with a direct resistance A-, and an A2 of KM18 is grounded; a2 nd pin of KM16 is connected with a B phase current measuring wire, A1 st pin of KM16 is connected with I + at the high-voltage side of a direct current resistance tester, a 6 th pin of KM16 is connected with a B phase voltage measuring wire, a 5 th pin of KM16 is connected with U + at the high-voltage side of the direct current resistance tester, a 14 th pin of KM16 is connected with a direct resistance B + of PLC, a 13 th pin of KM16 is connected with an output end of a power supply module +24, A1 of KM16 is connected with the direct resistance B +, and A2 of KM16 is grounded; a2 nd pin of KM19 is connected with a B-phase current measuring line, A1 st pin of KM19 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of KM19 is connected with a B-phase voltage measuring line, a 5 th pin of KM19 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of KM19 is connected with a direct resistance B-of PLC, a 13 th pin of KM19 is connected with an output end of a power supply module +24, an A1 of KM19 is connected with a direct resistance B-, and an A2 of KM19 is grounded; a2 nd pin of KM17 is connected with a C phase current measuring wire, A1 st pin of KM17 is connected with I + at the high-voltage side of a direct current resistance tester, a 6 th pin of KM17 is connected with a C phase voltage measuring wire, a 5 th pin of KM17 is connected with U + at the high-voltage side of the direct current resistance tester, a 14 th pin of KM17 is connected with a direct resistance C + of PLC, a 13 th pin of KM17 is connected with an output end of a power supply module +24, A1 of KM17 is connected with the direct resistance C +, and A2 of KM17 is grounded; a2 nd pin of the KM20 is connected with a C-phase current measuring line, A1 st pin of the KM20 is connected with an I-on the high-voltage side of a direct-current resistance tester, a 6 th pin of the KM20 is connected with a C-phase voltage measuring line, a 5 th pin of the KM20 is connected with a U-on the high-voltage side of the direct-current resistance tester, a 14 th pin of the KM20 is connected with a direct resistance C-of the PLC, a 13 th pin of the KM20 is connected with an output end of a power supply module +24, an A1 of the KM20 is connected with the direct resistance C-, and an A2 of the KM20 is grounded; a pair of normally open switches are formed between the 1 st pin and the 2 nd pin of KM9, between the 5 th pin and the 6 th pin of KM7, and between the 13 th pin and the 14 th pin of KM 7; the same applies to KM10-KM20, i.e. KM10, KM11, KM12, KM13, KM14, KM15, KM16, KM17, KM18, KM19, KM20 are: a pair of normally open switches are formed between the 1 st pin and the 2 nd pin, a pair of normally open switches are formed between the 5 th pin and the 6 th pin, and a pair of normally open switches are formed between the 13 th pin and the 14 th pin; during testing, KM9 and KM13, KM10 and KM14, KM11 and KM12 are sequentially put in the low-pressure side, and KM15 and KM19, KM16 and KM20, KM17 and KM18 are sequentially put in the high-pressure side; KM9 and KM13 were charged together with KM15 and KM19, KM10 and KM14 were charged together with KM16 and KM20, and KM11 and KM12 and KM17 and KM18 were charged together.
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|---|---|---|---|
| CN202221317622.3U CN217587447U (en) | 2022-05-25 | 2022-05-25 | Intelligent energy efficiency device of distribution transformer and conversion circuit for intelligent detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814438A (en) * | 2022-05-25 | 2022-07-29 | 国网湖北省电力有限公司鄂州供电公司 | Intelligent detection method for energy efficiency of distribution transformer |
| CN116990625A (en) * | 2023-09-27 | 2023-11-03 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
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- 2022-05-25 CN CN202221317622.3U patent/CN217587447U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814438A (en) * | 2022-05-25 | 2022-07-29 | 国网湖北省电力有限公司鄂州供电公司 | Intelligent detection method for energy efficiency of distribution transformer |
| CN116990625A (en) * | 2023-09-27 | 2023-11-03 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
| CN116990625B (en) * | 2023-09-27 | 2023-12-08 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
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