Multi-section bus time-delay-free locking control circuit and method

Abstract

The invention provides a multi-section bus time-delay-free locking control circuit and method. The circuit is characterized in that a first incoming circuit breaker is electrically connected between a first main transformer and a first section of a first bus; the second incoming circuit breaker is electrically connected between the first main transformer and the second section of the first bus; the third incoming circuit breaker is electrically connected between the second main transformer and the first section of the second bus; the fourth incoming circuit breaker is electrically connected between the second main transformer and the second section of the second bus; the first section circuit breaker is electrically connected between the second section of the first bus and the first section of the second bus; the second section circuit breaker is electrically connected between the first sections of the first bus and the second sections of the second bus; the first interlocking loop is electrically connected between the first incoming circuit breaker and the first bus section; and the second interlocking loop is electrically connected between the second incoming circuit breaker and the second section of the first bus. According to the scheme, parallel operation of the two main transformers can be prevented, equipment safety is guaranteed, operation and maintenance reliability is improved, misoperation is avoided, and the working intensity of operation and maintenance personnel is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of busbar power supply, and in particular to a multi-section busbar non-delay locking control circuit and method. Background Art

[0002] In the single busbar double branch ring wiring project, in order to prevent the short-circuit current from exceeding the standard, two main transformers are not allowed to run in parallel. When one main transformer is put into operation, the operating personnel need to judge the actual position of the section and the low-voltage side incoming circuit breaker of the other main transformer, that is, the section interval and the two main transformer low-voltage incoming circuit breakers cannot be in the closed position at the same time. At present, the operation and position determination of the equipment can only rely on the operating personnel. The operation and maintenance personnel need to clearly judge the actual operation of each equipment and operate in sequence according to the five-protection program. The manual judgment, switch input five-protection logic program selection and operation time are long, and the workload is large. Once the judgment is wrong, it will cause misoperation, resulting in the parallel operation of the main transformers, the short-circuit current exceeds the standard, and the equipment is damaged; in addition, there is a certain delay, which affects the load power supply demand and power supply quality. Summary of the invention

[0003] The present invention provides a multi-section busbar delay-free locking control circuit and method, which can prevent two main transformers from running in parallel through a first interlocking circuit and a second interlocking circuit, thereby ensuring equipment safety and increasing operation and maintenance reliability. It does not require operation and maintenance personnel to make judgments, thus avoiding misoperation by operation and maintenance personnel that may cause equipment safety hazards, reducing the work intensity of operation and maintenance personnel, and solving the problem of low-voltage load transfer between the two main transformers.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A multi-section busbar non-delay blocking control circuit, comprising:

[0006] A first incoming line circuit breaker, wherein the first incoming line circuit breaker is electrically connected between the first main transformer and the first busbar section;

[0007] a second incoming line circuit breaker, the second incoming line circuit breaker being electrically connected between the first main transformer and the second section of the first busbar;

[0008] A third incoming line circuit breaker, the third incoming line circuit breaker being electrically connected between the second main transformer and the second busbar section;

[0009] a fourth incoming line circuit breaker, the fourth incoming line circuit breaker being electrically connected between the second main transformer and the second busbar section 2;

[0010] A first section circuit breaker, the first section circuit breaker being electrically connected between the first bus section 2 and the second bus section 1;

[0011] A second section circuit breaker, the second section circuit breaker being electrically connected between the first bus section 1 and the second bus section 2;

[0012] a first interlocking circuit, the first interlocking circuit being electrically connected between the first incoming circuit breaker and the first busbar section; when the fourth incoming circuit breaker and the second section circuit breaker are both closed, the first interlocking circuit is disconnected; when only one of the fourth incoming circuit breaker and the second section circuit breaker is closed or the fourth incoming circuit breaker and the second section circuit breaker are both opened, the first interlocking circuit is open;

[0013] a second interlocking circuit, the second interlocking circuit being electrically connected between the second incoming circuit breaker and the first busbar section 2; when the third incoming circuit breaker and the first section circuit breaker are both closed, the second interlocking circuit is disconnected; when only one of the third incoming circuit breaker and the first section circuit breaker is closed or the third incoming circuit breaker and the first section circuit breaker are both opened, the second interlocking circuit is open;

[0014] The first interlocking circuit acquires first opening state information of the fourth incoming circuit breaker and the second section circuit breaker, the first interlocking circuit generates first judgment information according to the first opening state information, and obtains first operation information of the first incoming circuit breaker according to the first judgment information;

[0015] The second interlocking circuit obtains the second opening state information of the third incoming circuit breaker and the first section circuit breaker, and the second interlocking circuit generates second judgment information according to the second opening state information, and obtains the second operation information of the second incoming circuit breaker according to the second judgment information.

[0016] Optionally, the first interlocking circuit includes:

[0017] A first normally closed auxiliary contact, the first normally closed auxiliary contact is electrically connected between the first incoming line circuit breaker and the first busbar section, and the first normally closed auxiliary contact is a normally closed auxiliary contact of the fourth incoming line circuit breaker;

[0018] A second normally closed auxiliary contact, the second normally closed auxiliary contact is electrically connected between the first incoming circuit breaker and the first busbar section, the second normally closed auxiliary contact is connected in parallel with the first normally closed auxiliary contact, and the second normally closed auxiliary contact is a normally closed auxiliary contact of the second section circuit breaker.

[0019] Optionally, the second interlocking circuit includes:

[0020] A third normally closed auxiliary contact, the third normally closed auxiliary contact is electrically connected between the second incoming line circuit breaker and the first busbar second section, and the third normally closed auxiliary contact is a normally closed auxiliary contact of the third incoming line circuit breaker;

[0021] A fourth normally closed auxiliary contact, the fourth normally closed auxiliary contact is electrically connected between the second incoming circuit breaker and the first busbar section 2, the fourth normally closed auxiliary contact is connected in parallel with the third normally closed auxiliary contact, and the fourth normally closed auxiliary contact is the normally closed auxiliary contact of the first section circuit breaker.

[0022] Optionally, the multi-section busbar non-delay blocking control circuit further includes:

[0023] a third interlocking circuit, the third interlocking circuit being electrically connected between the third incoming circuit breaker and the second busbar section;

[0024] When the second incoming line circuit breaker and the first section circuit breaker are both closed, the third interlock circuit is disconnected; when only one of the second incoming line circuit breaker and the first section circuit breaker is closed or the second incoming line circuit breaker and the first section circuit breaker are both opened, the third interlock circuit is open;

[0025] The third interlocking circuit obtains the third opening state information of the second incoming circuit breaker and the first section circuit breaker, and the third interlocking circuit generates third judgment information according to the third opening state information, and obtains the third operation information of the third incoming circuit breaker according to the third judgment information.

[0026] Optionally, the third interlocking circuit includes:

[0027] a fifth normally closed auxiliary contact, the fifth normally closed auxiliary contact being electrically connected between the third incoming line circuit breaker and the second busbar section, the fifth normally closed auxiliary contact being a normally closed auxiliary contact of the second incoming line circuit breaker;

[0028] The sixth normally closed auxiliary contact is electrically connected between the third incoming circuit breaker and the second busbar section, the sixth normally closed auxiliary contact is connected in parallel with the fifth normally closed auxiliary contact, and the sixth normally closed auxiliary contact is the normally closed auxiliary contact of the first section circuit breaker.

[0029] Optionally, the multi-section busbar non-delay blocking control circuit further includes:

[0030] a fourth interlocking circuit, the fourth interlocking circuit being electrically connected between the fourth incoming circuit breaker and the second busbar section 2;

[0031] When the first incoming line circuit breaker and the second section circuit breaker are both closed, the fourth interlock circuit is disconnected; when only one of the first incoming line circuit breaker and the second section circuit breaker is closed or the first incoming line circuit breaker and the second section circuit breaker are both disconnected, the fourth interlock circuit is open;

[0032] The fourth interlocking circuit obtains the fourth opening state information of the first incoming circuit breaker and the second section circuit breaker, and the fourth interlocking circuit generates fourth judgment information according to the fourth opening state information, and obtains fourth operation information of the fourth incoming circuit breaker according to the fourth judgment information.

[0033] Optionally, the fourth interlocking circuit includes:

[0034] a seventh normally closed auxiliary contact, the seventh normally closed auxiliary contact being electrically connected between the fourth incoming line circuit breaker and the second busbar section 2, the seventh normally closed auxiliary contact being a normally closed auxiliary contact of the first incoming line circuit breaker;

[0035] The eighth normally closed auxiliary contact is electrically connected between the fourth incoming line circuit breaker and the second busbar section 2, the eighth normally closed auxiliary contact is connected in parallel with the seventh normally closed auxiliary contact, and the eighth normally closed auxiliary contact is the normally closed auxiliary contact of the second section circuit breaker.

[0036] Optionally, current transformers are electrically connected between the first incoming line circuit breaker and the first main transformer, between the second incoming line circuit breaker and the first main transformer, between the third incoming line circuit breaker and the second main transformer, between the fourth incoming line circuit breaker and the second main transformer, between the first section circuit breaker and the second bus section 1, and between the second section circuit breaker and the second bus section 2.

[0037] The present invention also provides a multi-section busbar non-delay blocking control method, which is applied to the multi-section busbar non-delay blocking control circuit described above, and the method comprises:

[0038] Acquire first opening state information of the fourth incoming circuit breaker and the second section circuit breaker through the first interlocking circuit;

[0039] generating first judgment information according to the first opening state information;

[0040] Obtaining first operation information of a first incoming circuit breaker according to the first judgment information;

[0041] Acquire second opening state information of the third incoming circuit breaker and the first section circuit breaker through the second interlocking circuit;

[0042] generating second determination information according to the second opening state information;

[0043] Second operation information of the second incoming circuit breaker is obtained according to the second judgment information.

[0044] Optionally, the method further includes:

[0045] Acquiring third opening state information of the second incoming circuit breaker and the first section circuit breaker through the third interlocking circuit;

[0046] generating third judgment information according to the third opening state information;

[0047] Obtaining third operation information of a third incoming circuit breaker according to the third judgment information;

[0048] Acquiring fourth opening state information of the first incoming circuit breaker and the second section circuit breaker through the fourth interlocking circuit;

[0049] generating fourth determination information according to the fourth opening state information;

[0050] Fourth operation information of a fourth incoming circuit breaker is obtained according to the fourth judgment information.

[0051] The above solution of the present invention includes at least the following beneficial effects:

[0052] The above-mentioned scheme of the present invention can prevent the two main transformers from running in parallel through the first interlocking circuit and the second interlocking circuit, thereby ensuring equipment safety and increasing operation and maintenance reliability. It does not require operation and maintenance personnel to make judgments, avoids misoperation by operation and maintenance personnel, and causes equipment safety hazards. It reduces the work intensity of operation and maintenance personnel and solves the problem of low-voltage load transfer of the two main transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a module diagram of a multi-section busbar non-delay blocking control circuit provided by an embodiment of the present invention;

[0054] Figure 2 It is a circuit diagram of a multi-section busbar non-delay locking control circuit provided by an embodiment of the present invention.

[0055] The following are the descriptions of the reference numerals:

[0056] 10. The first main transformer; 11. The second main transformer; 21. The first incoming circuit breaker; 22. The second incoming circuit breaker; 23. The third incoming circuit breaker; 24. The fourth incoming circuit breaker; 31. The first interlocking circuit; 311. The first normally closed auxiliary contact; 312. The second normally closed auxiliary contact; 32. The second interlocking circuit; 321. The third normally closed auxiliary contact; 322. The fourth normally closed auxiliary contact; 33. The third interlocking circuit; 331. The fifth normally closed auxiliary contact; 332. The sixth normally closed auxiliary contact; 34. The fourth interlocking circuit; 341. The seventh normally closed auxiliary contact; 342. The eighth normally closed auxiliary contact; 41. The first busbar section 1; 42. The first busbar section 2; 43. The second busbar section 1; 44. The second busbar section 2; 51. The first section circuit breaker; 52. The second section circuit breaker. DETAILED DESCRIPTION

[0057] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0058] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a multi-section bus delay-free locking control circuit, comprising:

[0059] A first incoming line circuit breaker 21, the first incoming line circuit breaker 21 is electrically connected between the first main transformer 10 and the first busbar section 41;

[0060] A second incoming line circuit breaker 22, the second incoming line circuit breaker 22 is electrically connected between the first main transformer 10 and the first busbar second section 42;

[0061] A third incoming line circuit breaker 23, the third incoming line circuit breaker 23 is electrically connected between the second main transformer 11 and the second busbar section 43;

[0062] A fourth incoming line circuit breaker 24, the fourth incoming line circuit breaker 24 is electrically connected between the second main transformer 11 and the second busbar section 2 44;

[0063] A first section circuit breaker 51, the first section circuit breaker 51 is electrically connected between the first busbar section 2 42 and the second busbar section 1 43;

[0064] A second section circuit breaker 52, the second section circuit breaker 52 is electrically connected between the first bus section 1 41 and the second bus section 2 44;

[0065] The first interlocking circuit 31 is electrically connected between the first incoming circuit breaker 21 and the first busbar section 41; when the fourth incoming circuit breaker 24 and the second section circuit breaker 52 are both closed, the first interlocking circuit 31 is disconnected; when only one of the fourth incoming circuit breaker 24 and the second section circuit breaker 52 is closed or the fourth incoming circuit breaker 24 and the second section circuit breaker 52 are both opened, the first interlocking circuit 31 is open;

[0066] The second interlocking circuit 32 is electrically connected between the second incoming circuit breaker 22 and the first busbar second section 42; when the third incoming circuit breaker 23 and the first section circuit breaker 51 are both closed, the second interlocking circuit 32 is disconnected; when only one of the third incoming circuit breaker 23 and the first section circuit breaker 51 is closed or the third incoming circuit breaker 23 and the first section circuit breaker 51 are both opened, the second interlocking circuit 32 is connected;

[0067] The first interlocking circuit 31 obtains the first opening state information of the fourth incoming circuit breaker 24 and the second section circuit breaker 52, and the first interlocking circuit 31 generates the first judgment information according to the first opening state information, and obtains the first operation information of the first incoming circuit breaker 21 according to the first judgment information;

[0068] The second interlocking circuit 32 obtains the second opening state information of the third incoming circuit breaker 23 and the first section circuit breaker 51, generates second judgment information according to the second opening state information, and obtains the second operation information of the second incoming circuit breaker 22 according to the second judgment information.

[0069] In this embodiment, when the first busbar section 1 41 or the second busbar section 2 44 needs to be powered by the first main transformer 10: the first opening state information includes: the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both closed, the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both opened, and only one of the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 is closed;

[0070] If the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both closed, the second bus section 2 44 and the first bus section 1 41 are powered by the second transformer; the first judgment information is that the first interlocking circuit 31 is disconnected, and the first operation information is that the first incoming line circuit breaker 21 cannot be closed; because the first interlocking circuit 31 is disconnected, even if the first incoming line circuit breaker 21 is closed, the first main transformer 10 will not be connected to the first bus section 41, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel;

[0071] If the fourth incoming line circuit breaker 24 is closed and the second section circuit breaker 52 is opened, the second busbar section 2 44 is powered by the second main transformer 11; the first judgment information is that the first interlocking circuit 31 is open, and the first operation information is that the first incoming line circuit breaker 21 can be closed; because the first interlocking circuit 31 is open, the first incoming line circuit breaker 21 is closed at this time, the first main transformer 10 is connected to the first busbar section 1 41, and the first busbar section 1 41 is powered by the first main transformer 10, and the second busbar section 2 44 is powered by the second main transformer 11;

[0072] If the fourth incoming line circuit breaker 24 is opened and the second section circuit breaker 52 is closed, the first judgment information is that the first interlocking circuit 31 is open, and the first operation information is that the first incoming line circuit breaker 21 can be closed; because the first interlocking circuit 31 is open, the second section circuit breaker 52 is closed, and the first incoming line circuit breaker 21 is closed at this time, the first main transformer 10 is connected to the first bus section 1 41, and the first main transformer 10 is connected to the second bus section 2 44, and the first main transformer 10 is used to supply power to the first bus section 1 41 and the second bus section 2 44;

[0073] If the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both turned on, the first judgment information is that the first interlocking circuit 31 is open, and the first operation information is that the first incoming line circuit breaker 21 can be closed; since the first interlocking circuit 31 is open, the first incoming line circuit breaker 21 is closed at this time, the first main transformer 10 is connected to the first busbar section 41, and the first busbar section 41 is powered by the first main transformer 10;

[0074] When the first busbar section 2 42 or the second busbar section 1 43 needs to be powered by the first main transformer 10: the second opening state information includes: the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both closed, the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both opened, and only one of the third incoming line circuit breaker 23 and the first section circuit breaker 51 is closed;

[0075] If the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both closed, the second bus section 1 43 and the first bus section 2 42 are powered by the second main transformer 11; the second judgment information is that the second interlocking circuit 32 is disconnected, and the second operation information is that the second incoming line circuit breaker 22 cannot be closed; since the second interlocking circuit 32 is disconnected, even if the second incoming line circuit breaker 22 is closed, the first main transformer 10 will not be connected to the first bus section 2 42, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel;

[0076] If the third incoming line circuit breaker 23 is closed, the first section circuit breaker 51 is opened, and the second busbar section 1 43 is powered by the second main transformer 11; the second judgment information is that the second interlocking circuit 32 is open, and the second operation information is that the second incoming line circuit breaker 22 can be closed; because the second interlocking circuit 32 is open, the second incoming line circuit breaker 22 is closed at this time, the first main transformer 10 is connected to the first busbar section 2 42, and the first busbar section 2 42 is powered by the first main transformer 10, and the second busbar section 1 43 is powered by the second main transformer 11;

[0077] If the third incoming circuit breaker 23 is turned on and the first section circuit breaker 51 is closed, the second judgment information is that the second interlocking circuit 32 is open, and the second operation information is that the second incoming circuit breaker 22 can be closed; since the second interlocking circuit 32 is open, the second incoming circuit breaker 22 is closed at this time, the first main transformer 10 is connected to the first bus section 2 42, and the first main transformer 10 is connected to the second bus section 1 43, and the first main transformer 10 is used to supply power to the first bus section 2 42 and the second bus section 1 43;

[0078] If the third incoming circuit breaker 23 and the first section circuit breaker 51 are both turned on, the second judgment information is that the second interlocking circuit 32 is open, and the second operation information is that the second incoming circuit breaker 22 can be closed; since the second interlocking circuit 32 is open, the second incoming circuit breaker 22 is closed at this time, the first main transformer 10 is connected to the first bus section 2 42, and the first bus section 2 42 is powered by the first main transformer 10;

[0079] In this embodiment, the first interlocking circuit 31 and the second interlocking circuit 32 can prevent the two main transformers from running in parallel, thereby ensuring equipment safety and increasing operation and maintenance reliability. There is no need for operation and maintenance personnel to make judgments, which can avoid operation and maintenance personnel's misoperation and cause equipment safety hazards, reduce the work intensity of operation and maintenance personnel, and solve the problem of low-voltage load transfer of the two main transformers.

[0080] like Figure 2 As shown, in an optional embodiment of the present invention, the first interlocking circuit 31 includes:

[0081] A first normally closed auxiliary contact 311, the first normally closed auxiliary contact 311 is electrically connected between the first incoming circuit breaker 21 and the first busbar section 41, and the first normally closed auxiliary contact 311 is a normally closed auxiliary contact of the fourth incoming circuit breaker 24;

[0082] The second normally closed auxiliary contact 312 is electrically connected between the first incoming circuit breaker 21 and the first busbar section 41 . The second normally closed auxiliary contact 312 is connected in parallel with the first normally closed auxiliary contact 311 . The second normally closed auxiliary contact 312 is the normally closed auxiliary contact of the second section circuit breaker 52 .

[0083] In this embodiment, the fourth incoming line circuit breaker 24 is turned on, and the normally closed auxiliary contact of the fourth incoming line circuit breaker 24 is closed, that is, the first normally closed auxiliary contact 311 is closed; the fourth incoming line circuit breaker 24 is closed, and the normally closed auxiliary contact of the fourth incoming line circuit breaker 24 is opened, that is, the first normally closed auxiliary contact 311 is opened;

[0084] The second section circuit breaker 52 is opened, and the normally closed auxiliary contact of the second section circuit breaker 52 is closed, that is, the second normally closed auxiliary contact 312 is closed; the second section circuit breaker 52 is closed, and the normally closed auxiliary contact of the second section circuit breaker 52 is opened, that is, the second normally closed auxiliary contact 312 is opened;

[0085] The first normally closed auxiliary contact 311 and the second normally closed auxiliary contact 312 are both open, and the first interlocking circuit 31 is disconnected; at least one of the first normally closed auxiliary contact 311 and the second normally closed auxiliary contact 312 is closed, and the first interlocking circuit 31 is open;

[0086] The first interlocking circuit 31 is formed by connecting the first normally closed auxiliary contact 311 and the second normally closed auxiliary contact 312 in parallel, so that when the fourth incoming circuit breaker 24 and the second section circuit breaker 52 are both closed, the first interlocking circuit 31 is disconnected; when only one of the fourth incoming circuit breaker 24 and the second section circuit breaker 52 is closed or the fourth incoming circuit breaker 24 and the second section circuit breaker 52 are both opened, the first interlocking circuit 31 is connected.

[0087] like Figure 2 As shown, in an optional embodiment of the present invention, the second interlocking circuit 32 includes:

[0088] A third normally closed auxiliary contact 321, the third normally closed auxiliary contact 321 is electrically connected between the second incoming circuit breaker 22 and the first busbar second section 42, and the third normally closed auxiliary contact 321 is a normally closed auxiliary contact of the third incoming circuit breaker 23;

[0089] The fourth normally closed auxiliary contact 322 is electrically connected between the second incoming circuit breaker 22 and the first busbar section 2 42 . The fourth normally closed auxiliary contact 322 is connected in parallel with the third normally closed auxiliary contact 321 . The fourth normally closed auxiliary contact 322 is the normally closed auxiliary contact of the first section circuit breaker 51 .

[0090] In this embodiment, the third incoming line circuit breaker 23 is opened, and the normally closed auxiliary contact of the third incoming line circuit breaker 23 is closed, that is, the third normally closed auxiliary contact 321 is closed; the third incoming line circuit breaker 23 is closed, and the normally closed auxiliary contact of the third incoming line circuit breaker 23 is opened, that is, the third normally closed auxiliary contact 321 is opened;

[0091] The first section circuit breaker 51 is opened, and the normally closed auxiliary contact of the first section circuit breaker 51 is closed, that is, the fourth normally closed auxiliary contact 322 is closed; the first section circuit breaker 51 is closed, and the normally closed auxiliary contact of the first section circuit breaker 51 is opened, that is, the fourth normally closed auxiliary contact 322 is opened;

[0092] The third normally closed auxiliary contact 321 and the fourth normally closed auxiliary contact 322 are both open, and the second interlocking circuit 32 is disconnected; at least one of the third normally closed auxiliary contact 321 and the fourth normally closed auxiliary contact 322 is closed, and the second interlocking circuit 32 is open;

[0093] The second interlocking circuit 32 is formed by connecting the third normally closed auxiliary contact 321 and the fourth normally closed auxiliary contact 322 in parallel, so that when the third incoming circuit breaker 23 and the first section circuit breaker 51 are both closed, the second interlocking circuit 32 is disconnected; when only one of the third incoming circuit breaker 23 and the first section circuit breaker 51 is closed or when the third incoming circuit breaker 23 and the first section circuit breaker 51 are both opened, the second interlocking circuit 32 is connected.

[0094] like Figure 1 As shown, in an optional embodiment of the present invention, the multi-section busbar non-delay blocking control circuit further includes:

[0095] A third interlocking circuit 33, the third interlocking circuit 33 is electrically connected between the third incoming circuit breaker 23 and the second busbar section 43;

[0096] When the second incoming circuit breaker 22 and the first section circuit breaker 51 are both closed, the third interlock circuit 33 is disconnected; when only one of the second incoming circuit breaker 22 and the first section circuit breaker 51 is closed or the second incoming circuit breaker 22 and the first section circuit breaker 51 are both opened, the third interlock circuit 33 is connected;

[0097] The third interlocking circuit 33 obtains the third opening state information of the second incoming circuit breaker 22 and the first section circuit breaker 51, and the third interlocking circuit 33 generates third judgment information according to the third opening state information, and obtains the third operation information of the third incoming circuit breaker 23 according to the third judgment information.

[0098] In this embodiment, when the second busbar section 1 43 or the first busbar section 2 42 needs to be powered by the second main transformer 11: the third opening state information includes that the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both closed, the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both opened, and only one of the second incoming line circuit breaker 22 and the first section circuit breaker 51 is closed;

[0099] If the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both closed, the first busbar section 2 42 and the second busbar section 1 43 are powered by the first main transformer 10; the third judgment information is that the third interlocking circuit 33 is disconnected, and the third operation information is that the third incoming line circuit breaker 23 cannot be closed; since the third interlocking circuit 33 is disconnected, even if the third incoming line circuit breaker 23 is closed at this time, the second main transformer 11 will not be connected to the second busbar section 1 43, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel;

[0100] If the second incoming circuit breaker 22 is closed, the first section circuit breaker 51 is opened, and the first busbar section 2 42 is powered by the first main transformer 10; the third judgment information is that the third interlocking circuit 33 is open, and the third operation information is that the third incoming circuit breaker 23 can be closed; because the third interlocking circuit 33 is open, the third incoming circuit breaker 23 is closed at this time, the second main transformer 11 is connected to the second busbar section 1 43, and the second busbar section 1 43 is powered by the second main transformer 11, and the first busbar section 2 42 is powered by the first main transformer 10;

[0101] If the second incoming circuit breaker 22 is turned on and the first section circuit breaker 51 is closed, the third judgment information is that the third interlocking circuit 33 is open, and the third operation information is that the third incoming circuit breaker 23 can be closed; since the third interlocking circuit 33 is open, the third incoming circuit breaker 23 is closed at this time, the second main transformer 11 is connected to the second busbar section 43, and the second main transformer 11 is connected to the first busbar section 41, and the second busbar section 43 and the first busbar section 41 are powered by the second main transformer 11;

[0102] If the second incoming circuit breaker 22 and the first section circuit breaker 51 are both turned on, the third judgment information is that the third interlocking circuit 33 is open, and the third operation information is that the third incoming circuit breaker 23 can be closed; since the third interlocking circuit 33 is open, the third incoming circuit breaker 23 is closed at this time, the second main transformer 11 is connected to the second busbar section 43, and the second busbar section 43 is powered by the second main transformer 11;

[0103] The third interlocking circuit 33 can prevent the two main transformers from running in parallel, ensure equipment safety, increase operation and maintenance reliability, eliminate the need for judgment by operation and maintenance personnel, avoid misoperation by operation and maintenance personnel, and cause equipment safety hazards. It reduces the work intensity of operation and maintenance personnel and solves the problem of low-voltage load transfer between the two main transformers.

[0104] like Figure 2 As shown, in an optional embodiment of the present invention, the third interlocking circuit 33 includes:

[0105] A fifth normally closed auxiliary contact 331, the fifth normally closed auxiliary contact 331 is electrically connected between the third incoming circuit breaker 23 and the second busbar section 43, and the fifth normally closed auxiliary contact 331 is a normally closed auxiliary contact of the second incoming circuit breaker 22;

[0106] The sixth normally closed auxiliary contact 332 is electrically connected between the third incoming circuit breaker 23 and the second busbar section 43. The sixth normally closed auxiliary contact 332 is connected in parallel with the fifth normally closed auxiliary contact 331. The sixth normally closed auxiliary contact 332 is the normally closed auxiliary contact of the first section circuit breaker 51.

[0107] In this embodiment, the second incoming line circuit breaker 22 is opened, and the normally closed auxiliary contact of the second incoming line circuit breaker 22 is closed, that is, the fifth normally closed auxiliary contact 331 is closed; the second incoming line circuit breaker 22 is closed, and the normally closed auxiliary contact of the second incoming line circuit breaker 22 is opened, that is, the fifth normally closed auxiliary contact 331 is opened;

[0108] The first section circuit breaker 51 is opened, and the normally closed auxiliary contact of the first section circuit breaker 51 is closed, that is, the sixth normally closed auxiliary contact 332 is closed; the first section circuit breaker 51 is closed, and the normally closed auxiliary contact of the first section circuit breaker 51 is opened, that is, the sixth normally closed auxiliary contact 332 is opened;

[0109] When the fifth normally closed auxiliary contact 331 and the sixth normally closed auxiliary contact 332 are both open, the third interlocking circuit 33 is disconnected; when at least one of the fifth normally closed auxiliary contact 331 and the sixth normally closed auxiliary contact 332 is closed, the third interlocking circuit 33 is open;

[0110] The third interlocking circuit 33 is formed by connecting the fifth normally closed auxiliary contact 331 and the sixth normally closed auxiliary contact 332 in parallel, so that when the second incoming circuit breaker 22 and the first section circuit breaker 51 are both closed, the third interlocking circuit 33 is disconnected; when only one of the second incoming circuit breaker 22 and the first section circuit breaker 51 is closed or both are opened, the third interlocking circuit 33 is connected.

[0111] like Figure 1 As shown, in an optional embodiment of the present invention, the multi-section busbar non-delay blocking control circuit further includes:

[0112] A fourth interlocking circuit 34, the fourth interlocking circuit 34 is electrically connected between the fourth incoming circuit breaker 24 and the second busbar section 2 44;

[0113] When the first incoming circuit breaker 21 and the second section circuit breaker 52 are both closed, the fourth interlock circuit 34 is disconnected; when only one of the first incoming circuit breaker 21 and the second section circuit breaker 52 is closed or the first incoming circuit breaker 21 and the second section circuit breaker 52 are both disconnected, the fourth interlock circuit 34 is open;

[0114] The fourth interlocking circuit 34 obtains the fourth opening state information of the first incoming circuit breaker 21 and the second section circuit breaker 52, generates fourth judgment information according to the fourth opening state information, and obtains fourth operation information of the fourth incoming circuit breaker 24 according to the fourth judgment information.

[0115] In this embodiment, when the second busbar section 2 44 or the first busbar section 1 41 needs to be powered by the second main transformer 11: the fourth opening state information includes that the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both closed, the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both opened, and only one of the first incoming line circuit breaker 21 and the second section circuit breaker 52 is closed;

[0116] If the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both closed, the first busbar section 1 41 and the second busbar section 2 44 are powered by the first main transformer 10; the fourth judgment information is that the fourth interlocking circuit 34 is disconnected, and the fourth operation information is that the fourth incoming line circuit breaker 24 cannot be closed; because the fourth interlocking circuit 34 is disconnected, even if the fourth incoming line circuit breaker 24 is closed at this time, the second main transformer 11 will not be connected to the second busbar section 2 44, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel;

[0117] If the first incoming line circuit breaker 21 is closed, the second section circuit breaker 52 is opened, and the first busbar section 1 41 is powered by the first main transformer 10; the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming line circuit breaker 24 can be closed; because the fourth interlocking circuit 34 is open, the fourth incoming line circuit breaker 24 is closed at this time, the second main transformer 11 is connected to the second busbar section 2 44, and the second busbar section 2 44 is powered by the second main transformer 11, and the first busbar section 1 41 is powered by the first main transformer 10;

[0118] If the first incoming circuit breaker 21 is turned on and the second section circuit breaker 52 is closed, the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming circuit breaker 24 can be closed; since the fourth interlocking circuit 34 is open, the fourth incoming circuit breaker 24 is closed at this time, the second main transformer 11 is connected to the second bus section 2 44, and the second main transformer 11 is connected to the first bus section 1 41, and the second bus section 2 44 and the first bus section 1 41 are powered by the second main transformer 11;

[0119] If the first incoming circuit breaker 21 and the second section circuit breaker 52 are both turned on, the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming circuit breaker 24 can be closed; since the fourth interlocking circuit 34 is open, the fourth incoming circuit breaker 24 is closed at this time, the second main transformer 11 is connected to the second bus section 44, and the second bus section 44 is powered by the second main transformer 11;

[0120] The fourth interlocking circuit 34 can prevent the two main transformers from running in parallel, ensure equipment safety, increase operation and maintenance reliability, eliminate the need for judgment by operation and maintenance personnel, avoid misoperation by operation and maintenance personnel, and cause equipment safety hazards. It reduces the work intensity of operation and maintenance personnel and solves the problem of low-voltage load transfer between the two main transformers.

[0121] like Figure 2 As shown, in an optional embodiment of the present invention, the fourth interlocking circuit 34 includes:

[0122] The seventh normally closed auxiliary contact 341 is electrically connected between the fourth incoming line circuit breaker 24 and the second busbar section 2 44 . The seventh normally closed auxiliary contact 341 is a normally closed auxiliary contact of the first incoming line circuit breaker 21 .

[0123] The eighth normally closed auxiliary contact 342 is electrically connected between the fourth incoming line circuit breaker 24 and the second busbar section 2 44 . The eighth normally closed auxiliary contact 342 is connected in parallel with the seventh normally closed auxiliary contact 341 . The eighth normally closed auxiliary contact 342 is the normally closed auxiliary contact of the second section circuit breaker 52 .

[0124] In this embodiment, the first incoming line circuit breaker 21 is turned on, and the normally closed auxiliary contact of the first incoming line circuit breaker 21 is closed, that is, the seventh normally closed auxiliary contact 341 is closed; the first incoming line circuit breaker 21 is closed, and the normally closed auxiliary contact of the first incoming line circuit breaker 21 is opened, that is, the seventh normally closed auxiliary contact 341 is opened;

[0125] The second section circuit breaker 52 is opened, and the normally closed auxiliary contact of the second section circuit breaker 52 is closed, that is, the eighth normally closed auxiliary contact 342 is closed; the second section circuit breaker 52 is closed, and the normally closed auxiliary contact of the second section circuit breaker 52 is opened, that is, the eighth normally closed auxiliary contact 342 is opened;

[0126] When the seventh normally closed auxiliary contact 341 and the eighth normally closed auxiliary contact 342 are both open, the fourth interlocking circuit 34 is disconnected; when at least one of the seventh normally closed auxiliary contact 341 and the eighth normally closed auxiliary contact 342 is closed, the fourth interlocking circuit 34 is open;

[0127] The fourth interlocking circuit 34 is formed by connecting the seventh normally closed auxiliary contact 341 and the eighth normally closed auxiliary contact 342 in parallel, so that when the first incoming circuit breaker 21 and the second section circuit breaker 52 are both closed, the fourth interlocking circuit 34 is disconnected; when only one of the first incoming circuit breaker 21 and the second section circuit breaker 52 is closed or the first incoming circuit breaker 21 and the second section circuit breaker 52 are both disconnected, the fourth interlocking circuit 34 is connected.

[0128] like Figure 2 As shown, in an optional embodiment of the present invention, current transformers are electrically connected between the first incoming line circuit breaker 21 and the first main transformer 10, between the second incoming line circuit breaker 22 and the first main transformer 10, between the third incoming line circuit breaker 23 and the second main transformer 11, between the fourth incoming line circuit breaker 24 and the second main transformer 11, between the first section circuit breaker 51 and the second bus section 1 43, and between the second section circuit breaker 52 and the second bus section 2 44.

[0129] In this embodiment, by setting a current transformer, the current of each line can be detected to ensure the safety of each line;

[0130] In this embodiment, the first incoming circuit breaker 21 is electrically connected to a first display light through a first capacitor, and the closing and opening of the first incoming circuit breaker 21 can be judged by turning on and off the first display light; the second incoming circuit breaker 22 is electrically connected to a second display light through a second capacitor, and the closing and opening of the second incoming circuit breaker 22 can be judged by turning on and off the second display light; the third incoming circuit breaker 23 is electrically connected to a third display light through a third capacitor, and the closing and opening of the third incoming circuit breaker 23 can be judged by turning on and off the third display light. The fourth incoming circuit breaker 24 is electrically connected to a fourth display light through a fourth capacitor, and the closing and opening of the fourth incoming circuit breaker 24 can be determined by turning on and off the fourth display light; the first section circuit breaker 51 is electrically connected to a fifth display light through a fifth capacitor, and the closing and opening of the first section circuit breaker 51 can be determined by turning on and off the fifth display light; the second section circuit breaker 52 is electrically connected to a sixth display light through a sixth capacitor, and the closing and opening of the second section circuit breaker 52 can be determined by turning on and off the sixth display light.

[0131] The specific implementation process of the multi-section busbar non-delay blocking control circuit:

[0132] The first incoming line circuit breaker 21, the second incoming line circuit breaker 22, the third incoming line circuit breaker 23, the fourth incoming line circuit breaker 24, the first section circuit breaker 51 and the second section circuit breaker 52 are all trolley-type drawer-type circuit breakers;

[0133] During normal operation, the first main transformer 10 and the second main transformer 11 are powered at the same time, the first incoming line circuit breaker 21, the second incoming line circuit breaker 22, the third incoming line circuit breaker 23 and the fourth incoming line circuit breaker 24 are all closed, and the first section circuit breaker 51 and the second section circuit breaker 52 are opened; the first section circuit breaker 51 is opened, and the normally closed auxiliary contact of the first section circuit breaker 51 is closed, that is, the fourth normally closed auxiliary contact 322 and the sixth normally closed auxiliary contact 332 are both closed, and the second interlocking circuit 32 and the third interlocking circuit 33 are both connected, The first busbar section 2 42 is powered by the first main transformer 10, and the second busbar section 1 43 is powered by the second main transformer 11; the second section circuit breaker 52 is turned on, and the normally closed auxiliary contact of the second section circuit breaker 52 is closed, that is, the second normally closed auxiliary contact 312 and the eighth normally closed auxiliary contact 342 are both closed, the first interlocking circuit 31 and the fourth interlocking circuit 34 are both connected, and the first busbar section 1 41 is powered by the first main transformer 10, and the second busbar section 2 44 is powered by the second main transformer 11;

[0134] When the first main transformer 10 is in maintenance state:

[0135] The first incoming line circuit breaker 21 and the second incoming line circuit breaker 22 need to be opened. In order to ensure normal power supply, the first bus section 1 41, the first bus section 2 42, the second bus section 1 43 and the second bus section 2 44 need to be powered by the second main transformer 11. The first section circuit breaker 51 and the second section circuit breaker 52 need to be closed.

[0136] The first incoming circuit breaker 21 is turned on, and the normally closed auxiliary contact of the first incoming circuit breaker 21 is closed, that is, the seventh normally closed auxiliary contact 341 is closed; the second section circuit breaker 52 is closed, and the normally closed auxiliary contact of the second section circuit breaker 52 is opened, that is, the eighth normally closed auxiliary contact 342 is opened, at this time, the fourth interlocking circuit 34 is connected, the second main transformer 11 is connected to the second bus section 2 44, and the second main transformer 11 is connected to the first bus section 1 41, and the second bus section 2 44 and the first bus section 1 41 are powered by the second main transformer 11;

[0137] The second incoming circuit breaker 22 is turned on, and the normally closed auxiliary contact of the second incoming circuit breaker 22 is closed, that is, the fifth normally closed auxiliary contact 331 is closed; the first section circuit breaker 51 is closed, and the normally closed auxiliary contact of the first section circuit breaker 51 is opened, that is, the sixth normally closed auxiliary contact 332 is opened, at this time, the third interlocking circuit 33 is connected, the second main transformer 11 is connected to the second bus section 1 43, and the second main transformer 11 is connected to the first bus section 2 42, and the second main transformer 11 is used to supply power to the second bus section 1 43 and the first bus section 2 42;

[0138] When the first main transformer 10 is overhauled and needs to be put into operation and supply power:

[0139] The operator closes the first incoming circuit breaker 21, and the normally closed auxiliary contact of the first incoming circuit breaker 21 is opened, that is, the seventh normally closed auxiliary contact 341 is opened. Since the second section circuit breaker 52 is closed, the normally closed auxiliary contact of the second section circuit breaker 52 is opened, that is, the second normally closed auxiliary contact 312 and the eighth normally closed auxiliary contact 342 are both opened. The fourth incoming circuit breaker 24 is closed, and the normally closed auxiliary contact of the fourth incoming circuit breaker 24 is opened, that is, the first normally closed auxiliary contact 311 is opened, and the first interlock circuit 31 and the fourth interlock circuit 34 are both disconnected. After the first incoming circuit breaker 21 is closed, the second section circuit breaker 52 is opened, and the normally closed auxiliary contact of the second section circuit breaker 52 is closed, that is, the second normally closed auxiliary contact 312 and the eighth normally closed auxiliary contact 342 are both closed, the first interlocking circuit 31 and the second interlocking circuit 32 are both connected, the first main transformer 10 is connected to the first bus section 1 41, and the second main transformer 11 is connected to the second bus section 2 44. The first main transformer 10 supplies power to the first bus section 1 41, and the second main transformer 11 supplies power to the second bus section 2 44.

[0140] The operator closes the second incoming circuit breaker 22, and the normally closed auxiliary contact of the second incoming circuit breaker 22 is opened, that is, the fifth normally closed auxiliary contact 331 is opened. Since the first section circuit breaker 51 is closed, the normally closed auxiliary contact of the first section circuit breaker 51 is opened, that is, the fourth normally closed auxiliary contact 322 and the sixth normally closed auxiliary contact 332 are both opened, the third incoming circuit breaker 23 is closed, and the normally closed auxiliary contact of the third incoming circuit breaker 23 is opened, that is, the third normally closed auxiliary contact 321 is opened, and the second interlock circuit 32 and the third interlock circuit 33 are both disconnected; after completing the closing of the second first circuit breaker After closing, the first section circuit breaker 51 is opened, the normally closed auxiliary contact of the first section circuit breaker 51 is closed, that is, the fourth normally closed auxiliary contact 322 and the sixth normally closed auxiliary contact 332 are closed, the second interlocking circuit 32 and the third interlocking circuit 33 are both connected, the first main transformer 10 is connected to the first bus section 2 42, the second main transformer 11 is connected to the second bus section 1 43, the first main transformer 10 is used to supply power to the first bus section 2 42, and the second main transformer 11 is used to supply power to the second bus section 1 43; the low-voltage load transfer problem of the two main transformers is completed;

[0141] Through the above process, the first interlocking circuit 31, the second interlocking circuit 32, the third interlocking circuit 33 and the fourth interlocking circuit 34 can prevent the two main transformers from running in parallel, ensure the safety of equipment, increase the reliability of operation and maintenance, and avoid the need for judgment by operation and maintenance personnel, thereby avoiding misoperation by operation and maintenance personnel, causing equipment safety hazards, reducing the work intensity of operation and maintenance personnel, and solving the problem of low-voltage load transfer of the two main transformers.

[0142] An embodiment of the present invention further provides a multi-section busbar non-delay blocking control method, which is applied to the multi-section busbar non-delay blocking control circuit of any of the above embodiments, and the method comprises:

[0143] Acquire the first opening state information of the fourth incoming circuit breaker 24 and the second section circuit breaker 52 through the first interlocking circuit 31;

[0144] The first interlocking circuit 31 generates first judgment information according to the first opening state information;

[0145] Obtaining first operation information of the first incoming circuit breaker 21 according to the first judgment information;

[0146] Acquire second opening state information of the third incoming circuit breaker 23 and the first section circuit breaker 51 through the second interlocking circuit 32;

[0147] The second interlock circuit 32 generates second judgment information according to the second opening state information;

[0148] According to the second judgment information, second operation information of the second incoming circuit breaker 22 is obtained.

[0149] Furthermore, the method also includes:

[0150] Acquiring third opening state information of the second incoming circuit breaker 22 and the first section circuit breaker 51 through the third interlocking circuit 33;

[0151] The third interlocking circuit 33 generates third judgment information according to the third opening state information;

[0152] Obtaining third operation information of the third incoming circuit breaker 23 according to the third judgment information;

[0153] Acquiring fourth opening state information of the first incoming circuit breaker 21 and the second section circuit breaker 52 through the fourth interlocking circuit 34;

[0154] The fourth interlock circuit 34 generates fourth determination information according to the fourth opening state information;

[0155] According to the fourth judgment information, fourth operation information of the fourth incoming circuit breaker 24 is obtained.

[0156] In this embodiment, the first opening state information includes that the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both closed, the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both opened, and only one of the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 is closed; if the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both closed, the second bus section 2 44 and the first bus section 1 41 are powered by the second transformer; the first judgment information is that the first interlocking circuit 31 is disconnected, and the first operation information is that the first incoming line circuit breaker 21 cannot be closed; due to the first interlocking circuit 31 The interlocking circuit 31 is disconnected. At this time, even if the first incoming line circuit breaker 21 is closed, the first main transformer 10 will not be connected to the first bus section 1 41, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel. If the fourth incoming line circuit breaker 24 is closed and the second section circuit breaker 52 is opened, the second bus section 2 44 is powered by the second main transformer 11. The first judgment information is that the first interlocking circuit 31 is connected, and the first operation information is that the first incoming line circuit breaker 21 can be closed. Since the first interlocking circuit 31 is connected, the first incoming line circuit breaker 21 is closed at this time. The first main transformer 10 is connected to the first bus section 41, and the first bus section 41 is powered by the first main transformer 10, and the second bus section 2 44 is powered by the second main transformer 11; if the fourth incoming line circuit breaker 24 is turned on and the second section circuit breaker 52 is closed, the first judgment information is that the first interlocking circuit 31 is connected, and the first operation information is that the first incoming line circuit breaker 21 can be closed; because the first interlocking circuit 31 is connected and the second section circuit breaker 52 is closed, the first incoming line circuit breaker 21 is closed at this time, and the first main transformer 10 is connected to the first bus section 41 , the first main transformer 10 is connected to the second bus section 2 44, and the first bus section 1 41 and the second bus section 2 44 are powered by the first main transformer 10; if the fourth incoming line circuit breaker 24 and the second section circuit breaker 52 are both turned on, the first judgment information is that the first interlocking circuit 31 is open, and the first operation information is that the first incoming line circuit breaker 21 can be closed; because the first interlocking circuit 31 is open, the first incoming line circuit breaker 21 is closed at this time, the first main transformer 10 is connected to the first bus section 41, and the first bus section 41 is powered by the first main transformer 10;

[0157] The second opening state information includes that the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both closed, the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both opened, and only one of the third incoming line circuit breaker 23 and the first section circuit breaker 51 is closed; if the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both closed, the second bus section 1 43 and the first bus section 2 42 are powered by the second main transformer 11; the second judgment information is that the second interlocking circuit 32 is disconnected, and the second operation information is that the second incoming line circuit breaker 22 cannot be closed; due to the The second interlocking circuit 32 is disconnected. At this time, even if the second incoming line circuit breaker 22 is closed, the first main transformer 10 will not be connected to the first busbar section 2 42, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel; if the third incoming line circuit breaker 23 is closed, the first section circuit breaker 51 is opened, and the second busbar section 43 is powered by the second main transformer 11; the second judgment information is that the second interlocking circuit 32 is open, and the second operation information is that the second incoming line circuit breaker 22 can be closed; since the second interlocking circuit 32 is open, the second incoming line circuit breaker 22 is closed at this time. The first main transformer 10 is connected to the first bus section 42, the first bus section 42 is powered by the first main transformer 10, and the second bus section 43 is powered by the second main transformer 11; if the third incoming line circuit breaker 23 is turned on, the first section circuit breaker 51 is closed, the second judgment information is that the second interlocking circuit breaker 32 is open, and the second operation information is that the second incoming line circuit breaker 22 can be closed; because the second interlocking circuit 32 is open, the second incoming line circuit breaker 22 is closed at this time, the first main transformer 10 is connected to the first bus section 42, and the first section circuit breaker 51 is closed. A main transformer 10 is connected to the second bus section 1 43, and the first bus section 2 42 and the second bus section 1 43 are powered by the first main transformer 10; if the third incoming line circuit breaker 23 and the first section circuit breaker 51 are both turned on, the second judgment information is that the second interlocking circuit 32 is open, and the second operation information is that the second incoming line circuit breaker 22 can be closed; because the second interlocking circuit 32 is open, the second incoming line circuit breaker 22 is closed at this time, the first main transformer 10 is connected to the first bus section 2 42, and the first bus section 2 42 is powered by the first main transformer 10;

[0158] The third opening state information includes that the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both closed, the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both opened, and only one of the second incoming line circuit breaker 22 and the first section circuit breaker 51 is closed; if the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both closed, the first main transformer 10 supplies power to the first bus section 2 42 and the second bus section 1 43; the third judgment information is that the third interlocking circuit 33 is disconnected, and the third operation information is that the third incoming line circuit breaker 23 cannot be closed; due to the third interlocking circuit 33 The lock circuit 33 is disconnected. At this time, even if the third incoming line circuit breaker 23 is closed, the second main transformer 11 will not be connected to the second bus section 43, thereby preventing the first main transformer 10 and the second main transformer 11 from operating in parallel; if the second incoming line circuit breaker 22 is closed, the first section circuit breaker 51 is opened, and the first bus section 42 is powered by the first main transformer 10; the third judgment information is that the third interlock circuit 33 is open, and the third operation information is that the third incoming line circuit breaker 23 can be closed; since the third interlock circuit 33 is open, the third incoming line circuit breaker 23 is closed at this time. The second main transformer 23 is connected to the second busbar section 43, the second main transformer 11 is connected to the second busbar section 43, the second busbar section 43 is powered by the second main transformer 11, and the first busbar section 2 42 is powered by the first main transformer 10; if the second incoming line circuit breaker 22 is turned on, the first section circuit breaker 51 is closed, the third judgment information is that the third interlocking circuit 33 is open, and the third operation information is that the third incoming line circuit breaker 23 can be closed; because the third interlocking circuit 33 is open, the third incoming line circuit breaker 23 is closed at this time, the second main transformer 11 is connected to the second busbar section 43, and the second The main transformer 11 is connected to the first busbar section 41, and the second busbar section 43 and the first busbar section 41 are powered by the second main transformer 11; if the second incoming line circuit breaker 22 and the first section circuit breaker 51 are both turned on, the third judgment information is that the third interlocking circuit 33 is open, and the third operation information is that the third incoming line circuit breaker 23 can be closed; because the third interlocking circuit 33 is open, the third incoming line circuit breaker 23 is closed at this time, the second main transformer 11 is connected to the second busbar section 43, and the second busbar section 43 is powered by the second main transformer 11;

[0159] The fourth opening state information includes that the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both closed, the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both opened, and only one of the first incoming line circuit breaker 21 and the second section circuit breaker 52 is closed; if the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both closed, the first bus section 1 41 and the second bus section 2 44 are powered by the first main transformer 10; the fourth judgment information is that the fourth interlocking circuit 34 is disconnected, and the fourth operation information is that the fourth incoming line circuit breaker 24 cannot be closed; due to the fourth interlocking circuit 34, the fourth interlocking circuit 34 is disconnected, and the fourth interlocking circuit breaker 24 is disconnected. The locking circuit 34 is disconnected. At this time, even if the fourth incoming line circuit breaker 24 is closed, the second main transformer 11 will not be connected to the second bus section 44, thereby preventing the first main transformer 10 and the second main transformer 11 from running in parallel; if the first incoming line circuit breaker 21 is closed, the second section circuit breaker 52 is opened, and the first bus section 41 is powered by the first main transformer 10; the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming line circuit breaker 24 can be closed; since the fourth interlocking circuit 34 is open, the fourth incoming line circuit breaker 24 is closed at this time. The second main transformer 24 is connected to the second bus section 44, the second main transformer 11 is connected to the second bus section 44, the second bus section 44 is powered by the second main transformer 11, and the first bus section 41 is powered by the first main transformer 10; if the first incoming line circuit breaker 21 is turned on, the second section circuit breaker 52 is closed, the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming line circuit breaker 24 can be closed; because the fourth interlocking circuit 34 is open, the fourth incoming line circuit breaker 24 is closed at this time, the second main transformer 11 is connected to the second bus section 44, and the second The main transformer 11 is connected to the first bus section 41, and the second bus section 2 44 and the first bus section 41 are powered by the second main transformer 11; if the first incoming line circuit breaker 21 and the second section circuit breaker 52 are both turned on, the fourth judgment information is that the fourth interlocking circuit 34 is open, and the fourth operation information is that the fourth incoming line circuit breaker 24 can be closed; because the fourth interlocking circuit 34 is open, the fourth incoming line circuit breaker 24 is closed at this time, the second main transformer 11 is connected to the second bus section 2 44, and the second bus section 2 44 is powered by the second main transformer 11;

[0160] Through the above method and process, the two main transformers can be prevented from running in parallel, the equipment safety is guaranteed, the operation and maintenance reliability is increased, the operation and maintenance personnel do not need to make judgments, and the operation and maintenance personnel can avoid misoperation and cause equipment safety hazards. The workload of the operation and maintenance personnel is reduced, and the problem of low-voltage load transfer of the two main transformers is solved.

[0161] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-section busbar non-delay blocking control circuit, characterized in that: include: A first incoming line circuit breaker (21), the first incoming line circuit breaker (21) being electrically connected between the first main transformer (10) and the first busbar section (41); A second incoming line circuit breaker (22), the second incoming line circuit breaker (22) being electrically connected between the first main transformer (10) and the first busbar second section (42); A third incoming line circuit breaker (23), the third incoming line circuit breaker (23) being electrically connected between the second main transformer (11) and the second busbar section (43); a fourth incoming line circuit breaker (24), the fourth incoming line circuit breaker (24) being electrically connected between the second main transformer (11) and the second busbar section 2 (44); A first section circuit breaker (51), the first section circuit breaker (51) being electrically connected between the first busbar section 2 (42) and the second busbar section 1 (43); A second section circuit breaker (52), the second section circuit breaker (52) being electrically connected between the first bus section 1 (41) and the second bus section 2 (44); A first interlocking circuit (31), the first interlocking circuit (31) being electrically connected between the first incoming line circuit breaker (21) and the first busbar section (41); when the fourth incoming line circuit breaker (24) and the second section circuit breaker (52) are both closed, the first interlocking circuit (31) is disconnected; when only one of the fourth incoming line circuit breaker (24) and the second section circuit breaker (52) is closed or the fourth incoming line circuit breaker (24) and the second section circuit breaker (52) are both opened, the first interlocking circuit (31) is open; a second interlocking circuit (32), the second interlocking circuit (32) being electrically connected between the second incoming circuit breaker (22) and the first busbar second section (42); when the third incoming circuit breaker (23) and the first section circuit breaker (51) are both closed, the second interlocking circuit (32) is disconnected; when only one of the third incoming circuit breaker (23) and the first section circuit breaker (51) is closed or the third incoming circuit breaker (23) and the first section circuit breaker (51) are both opened, the second interlocking circuit (32) is open; The first interlocking circuit (31) acquires first opening state information of the fourth incoming circuit breaker (24) and the second section circuit breaker (52), the first interlocking circuit (31) generates first judgment information according to the first opening state information, and obtains first operation information of the first incoming circuit breaker (21) according to the first judgment information; The second interlocking circuit (32) obtains the second opening state information of the third incoming circuit breaker (23) and the first section circuit breaker (51), and the second interlocking circuit (32) generates second judgment information based on the second opening state information, and obtains the second operation information of the second incoming circuit breaker (22) based on the second judgment information.

2. The multi-section busbar non-delay blocking control circuit according to claim 1 is characterized in that: The first interlocking circuit (31) comprises: a first normally closed auxiliary contact (311), the first normally closed auxiliary contact (311) being electrically connected between the first incoming line circuit breaker (21) and the first busbar section (41), the first normally closed auxiliary contact (311) being a normally closed auxiliary contact of the fourth incoming line circuit breaker (24); A second normally closed auxiliary contact (312), the second normally closed auxiliary contact (312) is electrically connected between the first incoming circuit breaker (21) and the first busbar section (41), the second normally closed auxiliary contact (312) is connected in parallel with the first normally closed auxiliary contact (311), and the second normally closed auxiliary contact (312) is a normally closed auxiliary contact of the second section circuit breaker (52).

3. The multi-section busbar non-delay blocking control circuit according to claim 1 is characterized in that: The second interlocking circuit (32) comprises: a third normally closed auxiliary contact (321), the third normally closed auxiliary contact (321) being electrically connected between the second incoming line circuit breaker (22) and the first busbar second section (42), the third normally closed auxiliary contact (321) being a normally closed auxiliary contact of the third incoming line circuit breaker (23); A fourth normally closed auxiliary contact (322), the fourth normally closed auxiliary contact (322) is electrically connected between the second incoming circuit breaker (22) and the first busbar section 2 (42), the fourth normally closed auxiliary contact (322) is connected in parallel with the third normally closed auxiliary contact (321), and the fourth normally closed auxiliary contact (322) is a normally closed auxiliary contact of the first section circuit breaker (51).

4. The multi-section busbar non-delay blocking control circuit according to claim 1, characterized in that: Also includes: A third interlocking circuit (33), the third interlocking circuit (33) being electrically connected between the third incoming circuit breaker (23) and the second busbar section (43); When the second incoming line circuit breaker (22) and the first segmented circuit breaker (51) are both closed, the third interlock circuit (33) is disconnected; when only one of the second incoming line circuit breaker (22) and the first segmented circuit breaker (51) is closed or the second incoming line circuit breaker (22) and the first segmented circuit breaker (51) are both opened, the third interlock circuit (33) is open; The third interlocking circuit (33) obtains the third opening state information of the second incoming circuit breaker (22) and the first section circuit breaker (51), and the third interlocking circuit (33) generates third judgment information based on the third opening state information, and obtains third operation information of the third incoming circuit breaker (23) based on the third judgment information.

5. The multi-section busbar non-delay blocking control circuit according to claim 4, characterized in that: The third interlocking circuit (33) comprises: a fifth normally closed auxiliary contact (331), the fifth normally closed auxiliary contact (331) being electrically connected between the third incoming line circuit breaker (23) and the second busbar section (43), the fifth normally closed auxiliary contact (331) being a normally closed auxiliary contact of the second incoming line circuit breaker (22); A sixth normally closed auxiliary contact (332), the sixth normally closed auxiliary contact (332) is electrically connected between the third incoming line circuit breaker (23) and the second busbar section (43), the sixth normally closed auxiliary contact (332) is connected in parallel with the fifth normally closed auxiliary contact (331), and the sixth normally closed auxiliary contact (332) is a normally closed auxiliary contact of the first section circuit breaker (51).

6. The multi-section busbar non-delay blocking control circuit according to claim 1, characterized in that: Also includes: A fourth interlocking circuit (34), the fourth interlocking circuit (34) being electrically connected between the fourth incoming circuit breaker (24) and the second busbar section 2 (44); When the first incoming line circuit breaker (21) and the second segmented circuit breaker (52) are both closed, the fourth interlocking circuit (34) is disconnected; when only one of the first incoming line circuit breaker (21) and the second segmented circuit breaker (52) is closed or the first incoming line circuit breaker (21) and the second segmented circuit breaker (52) are both disconnected, the fourth interlocking circuit (34) is open; The fourth interlocking circuit (34) obtains fourth opening state information of the first incoming circuit breaker (21) and the second section circuit breaker (52), and the fourth interlocking circuit (34) generates fourth judgment information based on the fourth opening state information, and obtains fourth operation information of the fourth incoming circuit breaker (24) based on the fourth judgment information.

7. The multi-section busbar non-delay blocking control circuit according to claim 6, characterized in that: The fourth interlocking circuit (34) comprises: a seventh normally closed auxiliary contact (341), the seventh normally closed auxiliary contact (341) being electrically connected between the fourth incoming line circuit breaker (24) and the second busbar section 2 (44), the seventh normally closed auxiliary contact (341) being a normally closed auxiliary contact of the first incoming line circuit breaker (21); An eighth normally closed auxiliary contact (342), the eighth normally closed auxiliary contact (342) is electrically connected between the fourth incoming line circuit breaker (24) and the second busbar section 2 (44), the eighth normally closed auxiliary contact (342) is connected in parallel with the seventh normally closed auxiliary contact (341), and the eighth normally closed auxiliary contact (342) is a normally closed auxiliary contact of the second section circuit breaker (52).

8. The multi-section busbar non-delay blocking control circuit according to claim 1, characterized in that: Current transformers are electrically connected between the first incoming line circuit breaker (21) and the first main transformer (10), between the second incoming line circuit breaker (22) and the first main transformer (10), between the third incoming line circuit breaker (23) and the second main transformer (11), between the fourth incoming line circuit breaker (24) and the second main transformer (11), between the first section circuit breaker (51) and the second busbar section 1 (43), and between the second section circuit breaker (52) and the second busbar section 2 (44).

9. A multi-section busbar non-delay locking control method, characterized in that: Applied to the multi-section busbar non-delay blocking control circuit according to any one of claims 1 to 8, the method comprises: Acquiring first opening state information of the fourth incoming line circuit breaker (24) and the second section circuit breaker (52) through the first interlocking circuit (31); generating first judgment information according to the first opening state information; Obtaining first operation information of a first incoming circuit breaker (21) according to the first judgment information; Acquiring second opening state information of the third incoming circuit breaker (23) and the first section circuit breaker (51) through the second interlocking circuit (32); generating second determination information according to the second opening state information; Second operation information of the second incoming circuit breaker (22) is obtained according to the second judgment information.

10. The multi-section busbar non-delay blocking control method according to claim 9, characterized in that: Also includes: Acquiring third opening state information of the second incoming circuit breaker (22) and the first section circuit breaker (51) through the third interlocking circuit (33); generating third judgment information according to the third opening state information; Obtaining third operation information of a third incoming circuit breaker (23) according to the third judgment information; Acquiring fourth opening state information of the first incoming circuit breaker (21) and the second section circuit breaker (52) through the fourth interlocking circuit (34); generating fourth determination information according to the fourth opening state information; Fourth operation information of a fourth incoming circuit breaker (24) is obtained according to the fourth judgment information.

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