Multifunctional low-voltage non-inductive transfer platform and synchronous grid connection and loop closing method thereof

Abstract

The invention discloses a multifunctional low-voltage non-inductive transfer platform and a synchronous grid-connected and loop-closing method thereof.The multifunctional low-voltage non-inductive transfer platform comprises a circuit breaker, the circuit breaker is connected with a synchronous grid-connected control module and a transformer area loop-closing control module, a circuit breaker is arranged between a first wiring terminal and a second wiring terminal, and a circuit breaker is arranged between the second wiring terminal and a third wiring terminal; the synchronous grid-connected control module is in communication connection with an external generator car through the communication end, the first wiring end is connected with the output end of the generator car through a generator sampling line, the second wiring end is connected with a first load through a first low-voltage cable, and the first load is connected with a first transformer through a first low-voltage switch. The third wiring terminal is connected with a second load through a second low-voltage cable, the second load is connected with the first transformer through a second low-voltage switch, the first sampling terminal is connected with the power side of the first low-voltage switch, and the second sampling terminal is connected with the power side of the second low-voltage switch. According to the invention, synchronous grid connection of the generator car can be realized, loop closing of two transformers can be completed, and two different operations can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power synchronous grid connection and ring closing, and in particular to a multifunctional low-voltage inductive power transfer platform and a synchronous grid connection and ring closing method thereof. Background Art

[0002] In order to improve the stable operation of the power system, the synchronous connection of the power generation vehicle or the synchronous connection of two transformers is usually adopted. The synchronous connection of the power generation vehicle refers to the process of directly connecting the power generation vehicle to the power grid, running synchronously with the power grid, and sharing the power grid load. The power of the power generation vehicle and the power grid are exchanged with each other to realize the distribution and utilization of power. It can ensure the stability of the power grid while reducing the interruption of power supply to users. The power grid can be maintained, repaired or upgraded without affecting the normal power consumption of users, avoiding the inconvenience and loss caused to users by power outages. The synchronous connection of two transformers to the grid refers to the closing of the two transformers. The closing of the ring allows the two transformers to share the pressure of power transmission and jointly support the load of the power system. When one of the transformers fails or needs maintenance, the other transformer can automatically take over its work, thereby ensuring the continuous power supply of the power system. However, when the scene changes, two different devices are required to realize the two different operations of synchronous connection of the power generation vehicle and synchronous connection of the two transformers. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a multifunctional low-voltage non-inductive power transfer platform which can realize two operation modes of synchronously connecting a power generation vehicle to the grid and closing the loop of two transformers.

[0004] The present invention is realized through the following technical scheme: a multifunctional low-voltage inductive power supply transfer platform, including a circuit breaker, a synchronous grid-connected control module, a substation area closed-loop control module, a wiring terminal 1, a wiring terminal 2, a wiring terminal 3, a sampling terminal 1, a sampling terminal 2, and a communication terminal. The circuit breaker is respectively connected to the synchronous grid-connected control module and the substation area closed-loop control module, the circuit breaker is arranged between the wiring terminal 1 and the wiring terminal 2, and the circuit breaker is arranged between the wiring terminal 2 and the wiring terminal 3. The synchronous grid-connected control module is connected to the external power generation vehicle through the communication terminal, the wiring terminal 1 is connected to the output terminal of the generator set of the power generation vehicle through the generator sampling line, the wiring terminal 2 is connected to the first load through the first low-voltage cable, the first load is connected to the first transformer through the first low-voltage switch, the wiring terminal 3 is connected to the second load through the second low-voltage cable, the second load is connected to the first transformer through the second low-voltage switch, the sampling terminal 1 is connected to the power supply side of the first low-voltage switch, and the sampling terminal 2 is connected to the power supply side of the second low-voltage switch.

[0005] Furthermore: the communication terminal is connected to the power generation vehicle through a communication line.

[0006] Furthermore: the connection circuit between the first terminal and the output terminal of the generator set of the generator vehicle is provided with a generator vehicle output switch.

[0007] Furthermore: the sampling terminal 1 is connected to the power supply side of the first low-voltage switch through a first sampling line.

[0008] Furthermore: the second sampling terminal is connected to the power supply side of the second low-voltage switch through a second sampling line.

[0009] The synchronous grid-connected method using the multifunctional low-voltage non-inductive power transfer platform described above includes a method in which the power generation vehicle supplies power to the first load and a method in which the power generation vehicle supplies power to the first load and the second load.

[0010] The method for the power generation vehicle to supply power to the first load comprises the following steps:

[0011] S10. The synchronous grid-connected control module collects the power parameters of the generator through the generator sampling line;

[0012] S12. The synchronous grid-connected control module collects the electric energy parameters of the first low-voltage switching power supply side through the first sampling line;

[0013] S13. The synchronous grid-connected control module collects the electric energy parameters of the first low-voltage switch power supply side and the electric energy parameters of the generator, compares the electric energy parameters of the generator and the electric energy parameters of the first low-voltage switch power supply side, and determines whether the electric energy parameters of the generator and the electric energy parameters of the first low-voltage switch power supply side are within the setting range, if not, execute step S14, if yes, execute step S15;

[0014] S14. The synchronous grid-connected control module adjusts the electric energy parameters of the generator;

[0015] S15. When the power parameters of the generator and the power parameters of the first low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the output switch of the generator car, closes the circuit breaker, disconnects the first low-voltage switch, and the generator car supplies power to the first load;

[0016] The method for the power generation vehicle to supply power to the first load and the second load comprises the following steps:

[0017] S20. The synchronous grid-connected control module collects the electric energy parameters of the second low-voltage switching power supply side through the second sampling line;

[0018] S21. The synchronous grid-connected control module adjusts the power parameters of the generator according to the collected power parameters on the second low-voltage switch power supply side, and adjusts the power parameters of the generator set to within the setting range;

[0019] S22. When the power parameters of the generator and the power parameters of the second low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the power output switch, disconnects the second low-voltage switch, and the generator car supplies power to the second load;

[0020] S23. The synchronous grid-connected control module completes the power supply to the second load. The synchronous grid-connected control module compares the power parameters of the generator and the power parameters of the first low-voltage switch power supply according to the collected power parameters of the generator and the power parameters of the first low-voltage switch power supply, and determines whether the power parameters of the generator and the power parameters of the first low-voltage switch power supply are within the setting range. If not, execute step S24, and if so, execute step S25;

[0021] S24. The synchronous grid-connected control module adjusts the power parameters of the generator according to the power parameters of the first transformer;

[0022] S25. When the power parameters of the generator and the power parameters of the first low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the circuit breaker of the multifunctional low-voltage non-inductive transfer platform, disconnects the first low-voltage switch, and the generator car supplies power to the first load;

[0023] S26. When the power generation vehicle supplies power to the first load and the second load, the multifunctional low-voltage inductive power transfer platform realizes one-to-two synchronous grid connection.

[0024] Furthermore, the electric energy parameters include voltage frequency, voltage amplitude, and voltage phase angle difference.

[0025] The loop closing method using the multifunctional low-voltage non-sensing power transfer platform described above comprises the following steps:

[0026] S30. The area closed-loop control module collects power information of the first transformer through the first low-voltage cable;

[0027] S31. The area closing loop control module collects the power information of the second transformer through the second low-voltage cable;

[0028] S32. The area closing-loop control module is in the closing-loop detection state. When it is detected that the power information of the first transformer and the power information of the second transformer are within the setting range, the circuit breaker is closed and the first low-voltage switch is disconnected, so that the power transfer between the first transformer and the second transformer is completed.

[0029] Furthermore, the electric energy information includes frequency, amplitude, and phase angle difference.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] By connecting the circuit breaker to the synchronous grid-connected control module and the area closing control module respectively, a circuit breaker is set between the terminal one and the terminal two, and a circuit breaker is set between the terminal two and the terminal three, the synchronous grid-connected control module is connected to the power generation vehicle through the communication terminal, the terminal one is connected to the output terminal of the generator set of the power generation vehicle through the generator sampling line, the terminal two is connected to the first load through the first low-voltage cable, the first load is connected to the first transformer through the first low-voltage switch, the terminal three is connected to the second load through the second low-voltage cable, and the second load is connected to the first transformer through the second low-voltage switch. The platform collects the electric energy parameters of the generator and the electric energy parameters of the power supply side of the first low-voltage switch when the generator car is connected to the power grid. Then the synchronous grid-connected control module of the platform adjusts the electric energy parameters of the generator and the power supply side of the first low-voltage switch so that the electric energy parameters of the two are within the setting range. Finally, the circuit breaker is controlled to close and the first low-voltage switch is disconnected so that the generator car supplies power to the first load. Alternatively, the platform first collects the electric energy parameters of the power supply side of the second low-voltage switch, and then the synchronous grid-connected control module of the platform adjusts the electric energy parameters of the generator and the power supply side of the first low-voltage switch so that the electric energy parameters of the two are within the setting range. Finally, the circuit breaker is controlled to close and the first low-voltage switch is disconnected so that the generator car supplies power to the first load. Alternatively, the platform first collects the electric energy parameters of the power supply side of the second low-voltage switch, and then the synchronous grid-connected control module of the platform The module adjusts the electric energy parameters of the generator and the electric energy parameters of the second low-voltage switch power supply side within the setting range, controls the generator to be connected to the grid, closes the output switch of the generator car, disconnects the second low-voltage switch, and the generator car supplies power to the second load. After the power supply to the second load is completed, the synchronous grid connection control module adjusts the electric energy parameters of the generator and the electric energy parameters of the first low-voltage switch power supply side within the setting range, controls the generator to be connected to the grid, closes the circuit breaker, disconnects the first low-voltage switch, and the generator supplies power to the first load, thereby realizing one-to-two synchronous grid connection, and the generator car unit supplies power to the first load and the second load. Electricity; when the first transformer and the second transformer are closed in a loop, the platform collects the electric energy information of the first transformer through the second terminal and the third terminal, and the area closing control module is in a closing detection state. When it is detected that the electric energy information of the two is within the setting range, the circuit breaker is closed and the first low-voltage switch is disconnected, so that the power transfer between the first transformer and the second transformer is completed, thereby realizing that only the power transfer platform of the present invention is needed to realize the connection of the power generation vehicle to the power grid and the completion of the power transfer between the two areas, and two different operations can be realized using one device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The wiring of the multifunctional low-voltage non-inductive power supply transfer platform of the present invention Figure 1 ;

[0033] Figure 2 The wiring of the multifunctional low-voltage non-inductive power supply transfer platform of the present invention Figure 2 ;

[0034] Figure 3 It is a structural block diagram of the multifunctional low-voltage non-sensing power supply transfer platform of the present invention.

[0035] Explanation of the reference numerals: K1-circuit breaker, 1-synchronous grid-connected control module, 2-station area closing control module, S1-first low-voltage switch, S2-second low-voltage switch, S3-generator car output switch. DETAILED DESCRIPTION

[0036] Reference Figures 1 to 3 The multifunctional low-voltage non-inductive power supply transfer platform provided in this embodiment includes a circuit breaker K1, a synchronous grid-connected control module 1, a substation area closing loop control module 2, a terminal 1, a terminal 2, a terminal 3, a sampling terminal 1, a sampling terminal 2, and a communication terminal. The circuit breaker K1 is connected to the synchronous grid-connected control module 1 and the substation area closing loop control module 2 respectively. The circuit breaker K1 is arranged between the terminal 1 and the terminal 2, and the circuit breaker K1 is arranged between the terminal 2 and the terminal 3. The synchronous grid-connected control module 1 is connected to the external power generation vehicle through the communication terminal. The terminal 1 is connected to the output terminal of the generator set of the power generation vehicle through the generator sampling line. The terminal 2 is connected to the first load through the first low-voltage cable, and the first load is connected to the first transformer through the first low-voltage switch S1. The terminal 3 is connected to the second load through the second low-voltage cable, and the second load is connected to the first transformer through the second low-voltage switch S2. The sampling terminal 1 is connected to the power supply side of the first low-voltage switch S1, and the sampling terminal 2 is connected to the power supply side of the second low-voltage switch S2.

[0037] The communication end is connected to the power generation vehicle via a communication line.

[0038] The connection circuit between the terminal 1 and the output terminal of the generator set of the generator car is provided with a generator car output switch S3.

[0039] The sampling terminal 1 is connected to the power supply side of the first low-voltage switch S1 through the first sampling line.

[0040] The sampling terminal 2 is connected to the power supply side of the second low-voltage switch S2 through a second sampling line.

[0041] The synchronous grid-connected method using the multifunctional low-voltage non-inductive power transfer platform provided in this embodiment includes a method for a power generation vehicle to supply power to a first load and a method for a power generation vehicle to supply power to a first load and a second load.

[0042] The method for the power generation vehicle to supply power to the first load comprises the following steps:

[0043] S10. The synchronous grid-connected control module collects the electric energy parameters of the generator through the generator sampling line.

[0044] S12. The synchronous grid-connected control module collects the electric energy parameters on the first low-voltage switching power supply side through the first sampling line.

[0045] S13. The synchronous grid-connected control module collects the electric energy parameters on the power supply side of the first low-voltage switch and the electric energy parameters of the generator, compares the electric energy parameters of the generator with the electric energy parameters on the power supply side of the first low-voltage switch S1, and determines whether the electric energy parameters of the generator and the electric energy parameters on the power supply side of the first low-voltage switch S1 are within the setting range. If not, execute step S14; if yes, execute step S15.

[0046] S14. The synchronous grid-connected control module adjusts the electric energy parameters of the generator.

[0047] S15. When the electric energy parameters of the generator and the electric energy parameters on the power supply side of the first low-voltage switch S1 are within the set range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the output switch S3 of the generator car, closes the circuit breaker K1, disconnects the first low-voltage switch S1, and the generator car supplies power to the first load.

[0048] The method for the power generation vehicle to supply power to the first load and the second load comprises the following steps:

[0049] S20. The synchronous grid-connected control module collects the electric energy parameters on the power supply side of the second low-voltage switch S2 through the second sampling line.

[0050] S21. The synchronous grid-connected control module adjusts the electric energy parameters of the generator according to the collected electric energy parameters on the power supply side of the second low-voltage switch S2, and adjusts the electric energy parameters of the generator set to within the set range.

[0051] S22. When the electric energy parameters of the generator and the electric energy parameters on the power supply side of the second low-voltage switch S2 are within the set range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the generator output switch S3, disconnects the second low-voltage switch S2, and the generator truck supplies power to the second load.

[0052] S23. The synchronous grid-connected control module completes the power supply to the second load. The synchronous grid-connected control module compares the electric energy parameters of the generator and the electric energy parameters of the power supply side of the first low-voltage switch S1 based on the collected electric energy parameters of the generator and the electric energy parameters of the power supply side of the first low-voltage switch S1, and determines whether the electric energy parameters of the generator and the electric energy parameters of the power supply side of the first low-voltage switch S1 are within the setting range. If not, execute step S24; if so, execute step S25.

[0053] S24. The synchronous grid-connected control module adjusts the electric energy parameters of the generator according to the electric energy parameters of the first transformer.

[0054] S25. When the electric energy parameters of the generator and the electric energy parameters on the power supply side of the first low-voltage switch S1 are within the set range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the circuit breaker K1 of the multifunctional low-voltage non-inductive power transfer platform, disconnects the first low-voltage switch S1, and the generator truck supplies power to the first load.

[0055] S26. When the power generation vehicle supplies power to the first load and the second load, the multifunctional low-voltage inductive power transfer platform realizes one-to-two synchronous grid connection.

[0056] Specifically, the electric energy parameters include voltage frequency, voltage amplitude, and voltage phase angle difference.

[0057] The loop closing method using the multifunctional low-voltage non-inductive power transfer platform provided in this embodiment includes the following steps:

[0058] S30. The substation closed-loop control module collects the electric energy information of the first transformer through the first low-voltage cable.

[0059] S31. The substation closed-loop control module collects the electric energy information of the second transformer through the second low-voltage cable.

[0060] S32. The area closing-loop control module is in the closing-loop detection state. When it is detected that the power information of the first transformer and the power information of the second transformer are within the setting range, the circuit breaker is closed and the first low-voltage switch is disconnected, so that the power transfer between the first transformer and the second transformer is completed.

[0061] Specifically, the electric energy information includes frequency, amplitude, and phase angle difference.

[0062] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. Multifunctional low-voltage non-inductive power supply platform, characterized by: It includes a circuit breaker, a synchronous grid-connected control module, a substation area closing loop control module, a terminal 1, a terminal 2, a terminal 3, a sampling terminal 1, a sampling terminal 2, and a communication terminal. The circuit breaker is connected to the synchronous grid-connected control module and the substation area closing loop control module respectively. The circuit breaker is arranged between the terminal 1 and the terminal 2, and the circuit breaker is arranged between the terminal 2 and the terminal 3. The synchronous grid-connected control module is connected to the external power generation vehicle through the communication terminal. The terminal 1 is connected to the output terminal of the generator set of the power generation vehicle through the generator sampling line. The terminal 2 is connected to the first load through the first low-voltage cable, and the first load is connected to the first transformer through the first low-voltage switch. The terminal 3 is connected to the second load through the second low-voltage cable, and the second load is connected to the first transformer through the second low-voltage switch. The sampling terminal 1 is connected to the power supply side of the first low-voltage switch, and the sampling terminal 2 is connected to the power supply side of the second low-voltage switch.

2. According to claim 1, the multifunctional low-voltage non-sensing power supply transfer platform is characterized in that: The communication terminal is connected to the power generation vehicle through a communication line.

3. According to claim 2, the multifunctional low-voltage non-sensing power supply transfer platform is characterized in that: The connection circuit between the first terminal and the output terminal of the generator set of the generator vehicle is provided with a generator vehicle output switch.

4. The multifunctional low-voltage non-sensing power supply transfer platform according to claim 3 is characterized in that: The sampling terminal 1 is connected to the power supply side of the first low-voltage switch through a first sampling line.

5. The multifunctional low-voltage non-sensing power supply transfer platform according to claim 4 is characterized in that: The second sampling terminal is connected to the power supply side of the second low-voltage switch through a second sampling line.

6. The synchronous grid-connected method using the multifunctional low-voltage non-sensing power transfer platform of claim 5 is characterized in that: The method includes a method for a power generation vehicle to supply power to a first load and a method for a power generation vehicle to supply power to a first load and a second load, The method for the power generation vehicle to supply power to the first load comprises the following steps: S10. The synchronous grid-connected control module collects the power parameters of the generator through the generator sampling line; S12. The synchronous grid-connected control module collects the electric energy parameters of the first low-voltage switching power supply side through the first sampling line; S13. The synchronous grid-connected control module collects the electric energy parameters of the first low-voltage switch power supply side and the electric energy parameters of the generator, compares the electric energy parameters of the generator and the electric energy parameters of the first low-voltage switch power supply side, and determines whether the electric energy parameters of the generator and the electric energy parameters of the first low-voltage switch power supply side are within the setting range, if not, execute step S14, if yes, execute step S15; S14. The synchronous grid-connected control module adjusts the electric energy parameters of the generator; S15. When the power parameters of the generator and the power parameters of the first low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the output switch of the generator car, closes the circuit breaker, disconnects the first low-voltage switch, and the generator car supplies power to the first load; The method for the power generation vehicle to supply power to the first load and the second load comprises the following steps: S20. The synchronous grid-connected control module collects the electric energy parameters of the second low-voltage switching power supply side through the second sampling line; S21. The synchronous grid-connected control module adjusts the power parameters of the generator according to the collected power parameters on the second low-voltage switch power supply side, and adjusts the power parameters of the generator set to within the setting range; S22. When the power parameters of the generator and the power parameters of the second low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the power output switch, disconnects the second low-voltage switch, and the generator car supplies power to the second load; S23. The synchronous grid-connected control module completes the power supply to the second load. The synchronous grid-connected control module compares the power parameters of the generator and the power parameters of the first low-voltage switch power supply according to the collected power parameters of the generator and the power parameters of the first low-voltage switch power supply, and determines whether the power parameters of the generator and the power parameters of the first low-voltage switch power supply are within the setting range. If not, execute step S24, and if so, execute step S25; S24. The synchronous grid-connected control module adjusts the power parameters of the generator according to the power parameters of the first transformer; S25. When the power parameters of the generator and the power parameters of the first low-voltage switch power supply side are within the setting range, the synchronous grid-connected control module controls the generator to be connected to the grid, closes the circuit breaker of the multifunctional low-voltage non-inductive transfer platform, disconnects the first low-voltage switch, and the generator car supplies power to the first load; S26. When the power generation vehicle supplies power to the first load and the second load, the multifunctional low-voltage inductive power transfer platform realizes one-to-two synchronous grid connection.

7. According to claim 6, the synchronous grid-connected method of the multifunctional low-voltage non-sensing power transfer platform according to claim 3 is characterized in that: The electric energy parameters include voltage frequency, voltage amplitude, and voltage phase angle difference.

8. A loop closing method using the multifunctional low-voltage non-sensing power transfer platform as claimed in claim 5, characterized in that: The following steps are involved: S30. The area closed-loop control module collects power information of the first transformer through the first low-voltage cable; S31. The area closing loop control module collects the power information of the second transformer through the second low-voltage cable; S32. The area closing-loop control module is in the closing-loop detection state. When it is detected that the power information of the first transformer and the power information of the second transformer are within the setting range, the circuit breaker is closed and the first low-voltage switch is disconnected, so that the power transfer between the first transformer and the second transformer is completed.

9. The loop closing method of the multifunctional low-pressure non-inductive power transfer platform according to claim 8 is characterized in that: The electric energy information includes frequency, amplitude, and phase angle difference.

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