CN216595420U

CN216595420U - Integrated permanent magnet wind driven generator stator winding insulation detection device

Info

Publication number: CN216595420U
Application number: CN202122864107.9U
Authority: CN
Inventors: 吴一斐; 许凌飞; 李晓锋; 武志坚
Original assignee: Zhejiang Haide New Energy Co Ltd
Current assignee: Zhejiang Haide New Energy Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-05-24
Anticipated expiration: 2031-11-22

Abstract

The utility model discloses an integrated permanent magnet wind driven generator stator winding insulation detection device which comprises a contactor KS1, a contactor KS3 and an insulation detection system. Through the integration in the wind power generation converter in the tower cylinder, communication is established between the insulation detection system and the converter control system, and then insulation detection and insulation data acquisition can be remotely and directly ordered by the wind power plant main control system, so that operation and maintenance personnel can diagnose fast and efficiently, and the operation and maintenance pressure is reduced.

Description

Integrated permanent magnet wind driven generator stator winding insulation detection device

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a permanent magnet wind power generator stator winding insulation detection device integrated in a wind power generation converter, which is suitable for online detection of the insulation performance of a permanent magnet wind power generator.

Background

With the increasing severity of environmental pollution and the increasing of energy crisis in various parts of the world, wind energy is used as an inexhaustible renewable energy source, and the influence of the wind energy is rising year by year; according to data disclosed by the national statistical bureau, in the national installed power generation capacity at the end of 2020, the installed grid-connected wind power capacity accounts for about 12.8% of the whole, and meanwhile, the installed grid-connected wind power rate is ranked first, so that the wind power industry develops most rapidly in 2020; meanwhile, with the departure of the fourteen-five planning, carbon peak reaching and carbon neutralization are proposed successively, and huge prospect space is brought to the field of new energy.

In the whole wind power generation system, the generator is taken as an important device for outputting electric energy, and the importance of the generator is self-evident; however, due to the complexity and diversity of the application environment of the wind turbine, a severe challenge is brought to the generator insulation system, especially due to the influence of a humid environment, a generator winding is easily affected by dampness, and temperature alternation caused by frequent start and stop of the wind turbine and day and night temperature difference further brings periodic stress influence; if the starting is performed under the condition that the insulation resistance value of the generator is low, serious accidents such as serious insulation breakdown can be caused, and therefore, in order to effectively improve the safety of operation, the irregular detection of the winding insulation of the wind driven generator is necessary.

The search of the prior art shows that the insulation performance of the wind driven generator is mainly detected by additionally arranging detection equipment in a tower drum: for example, chinese patent No. CN201921887165.x discloses an online monitor for insulation resistance of a wind turbine, and chinese patent No. CN201710270394.6 discloses a device and a method for detecting insulation of a generator of a permanent magnet wind turbine, both of which disclose an insulation detection device for a wind turbine, and both of which have a common property and are additionally provided with detection equipment in a tower of a wind turbine; although the method can realize the detection of the insulation performance of the generator, extra equipment is added in a narrow tower barrel, the maintainable space in the tower is further compressed, and the extra burden of operation and maintenance personnel is increased.

Therefore, on the premise of not increasing additional equipment in the fan tower and not increasing additional burden of operation and maintenance personnel, the insulation detection function of the generator integrated on the existing equipment has obvious practical significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a permanent magnet wind driven generator stator winding insulation detection device which can integrate the insulation detection function of a generator on the existing equipment; the utility model aims to solve the technical problem that the generator insulation detection device in the prior art cannot integrate the generator insulation detection function on the existing equipment.

In order to achieve the above object, the present invention provides an integrated insulation detection device for a stator winding of a permanent magnet wind power generator, which is characterized in that: the detection device comprises a contactor KS1, a contactor KS3 and an insulation detection system, wherein when the generator is a single winding, the contactor KS1 is connected with a direct current output positive electrode end HV + and a stator winding I of the permanent magnet generator, and the contactor KS3 is connected with a direct current output negative electrode end HV-and a grounding end of the permanent magnet generator; insulating detecting system includes CAN communication circuit, ARM handles the chip, DO drive circuit, DCDC high voltage output circuit, sampling circuit, contactor drive circuit, CAN communication circuit passes through the CAN bus and the connection of converter control system, carry out the information interaction between CAN communication circuit and the converter, ARM handles the operation that the chip is used for insulating detection procedure, DO drive circuit is used for driving the relay on the veneer, then three contactor KS1 of relay drive and KS3, DCDC high voltage output circuit is used for exporting direct current high voltage signal, sampling circuit is used for the sampling of voltage and electric current, and then calculate insulation resistance value, three contactor KS1 of contactor drive circuit drive and KS 3.

Preferably, when the generator is a bifilar, the detection device further comprises a contactor KS2, the contactor KS2 is connected with a direct current output positive terminal HV + and a stator winding II of the permanent magnet generator, the three contactors KS1, KS2 and KS3 are driven by a relay, and the three contactors KS1, KS2 and KS3 are driven by a contactor driving circuit.

Preferably, the DO drive circuit and the contactor drive circuit cooperate such that when testing stator winding one of the permanent magnet generators, contactor KS1 and contactor KS3 are closed, and when testing stator winding two of the permanent magnet generators, contactor KS2 and contactor KS3 are closed.

Preferably, the ARM processing chip is STM32F103RCT 6.

Preferably, the DCDC direct-current voltage output module is HO 1-P1251V-0.5D.

Preferably, in the sampling circuit, the sampling resistor of the voltage sampling circuit is 2 10K resistors of 0.1W, and the sampling resistor of the current sampling circuit is 2 1K resistors of 0.25W.

Preferably, the communication mode before the converter system and the wind farm master control system is any one of the following four modes: Profibus-DP protocol, CANopen protocol, INTERBUS protocol, Modbus protocol.

The insulation detection device is integrated in the wind power generation converter in the tower, communication is established between the insulation detection system and the converter control system, and then insulation detection and insulation data acquisition can be remotely and directly ordered through the wind power plant main control system, so that operation and maintenance personnel can diagnose quickly and efficiently, and the operation and maintenance pressure is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to fig. 1, the integrated permanent magnet wind turbine stator winding insulation detection device comprises a contactor KS1, a contactor KS2, a contactor KS3 and an insulation detection system. The contactor KS1 is connected with a direct current output positive electrode end HV + and a stator winding 1 of the permanent magnet generator, the contactor KS2 is connected with the direct current output positive electrode end HV + and a stator winding 2 of the permanent magnet generator (if the generator is a single winding, only the contactor KS1 is applied, and if the generator is a double winding, the contactor KS1 and the contactor KS2 are applied), and the contactor KS3 is connected with a direct current output negative electrode end HV-and a grounding end of the permanent magnet generator; the insulation detection system comprises a CAN communication circuit, an ARM processing chip, a DO driving circuit, a DCDC high-voltage output circuit, a sampling circuit and a contactor driving circuit, wherein the CAN communication circuit is connected with a converter control system through a CAN bus and CAN perform information interaction with a converter, the ARM processing chip is used for realizing an insulation detection program, the DO driving circuit is used for driving a relay on a single board, then the relay drives three contactors KS1, KS2 and KS3, the DCDC high-voltage output circuit is used for outputting a direct-current high-voltage signal, the sampling circuit is used for sampling voltage and current and further calculating an insulation resistance value, and the contactor driving circuit drives three contactors KS1, KS2 and KS 3; the DO drive circuit and the contactor drive circuit are matched with each other, when the stator winding 1 of the permanent magnet generator is tested, the contactor KS1 and the contactor KS3 are closed, and when the stator winding 2 of the permanent magnet generator is tested, the contactor KS2 and the contactor KS3 are closed; the ARM processing chip is STM32F103RCT6, and CAN communication between the converter system and the insulation detection system is realized through the chip; the DCDC direct-current voltage output module is HO1-P1251V-0.5D, the nominal output voltage is 1250VDC, and the specific value of the detected direct-current voltage is not limited by the utility model; in the sampling circuit, the sampling resistance of the voltage sampling circuit is 2 10K resistances of 0.1W, and the sampling resistance of the current sampling circuit is 2 1K resistances of 0.25W; the communication mode before the converter system and the wind farm master control system can be any one of the following four modes: Profibus-DP protocol, CANopen protocol, INTERBUS protocol, Modbus protocol.

When the permanent magnet wind driven generator is in a shutdown state, an insulation detection command is sent to the converter through the wind farm master control system, after the converter receives the insulation detection command, insulation performance detection of a generator stator winding is started, the highest 1250VDC voltage generated by the insulation detection system is added to the generator stator winding and a grounding end, the insulation resistance value is calculated through detecting leakage current in a loop, whether the insulation resistance value is within a normal range is checked, and the data is fed back to the wind farm master control system.

Testing the stator winding of the generator for one time: when the converter control system receives a main control command, an insulation detection command is transmitted to an ARM chip on an insulation detection system through CAN communication, the ARM chip judges whether the insulation detection condition is met or not, namely whether the insulation detection condition is in a shutdown state or not, when the insulation detection condition is met, the ARM chip firstly sends a signal to a DO driving circuit, a PB12 pin outputs a high level to drive the DO circuit, and meanwhile, a contactor KS1 and a contactor KS3 are driven, so that a detection loop of a first stator winding has a test condition; and finally, the ARM chip transmits the acquired data to the converter control system through CAN communication, and the converter control system feeds the data back to the wind power plant main control system.

When testing the stator winding II of the generator: when the converter control system receives a main control command, an insulation detection command is transmitted to an ARM chip on the insulation detection system through CAN communication, the ARM chip judges whether the insulation detection condition is met or not, namely whether the insulation detection condition is met or not is in a shutdown state, when the insulation detection condition is met, the ARM chip firstly sends a signal to a DO driving circuit, a PC10 pin outputs a high level to drive the DO circuit, and meanwhile, a contactor KS2 and a contactor KS3 are driven, so that a detection loop of a stator winding II has a test condition; and finally, the ARM chip transmits the acquired data to the converter control system through CAN communication, and the converter control system feeds the data back to the wind power plant main control system.

When the permanent magnet wind driven generator is in an operating state, even if the wind power plant main control system gives an insulation detection command due to misoperation, an ARM chip in the insulation detection system can judge whether the wind power plant main control system is in a shutdown state or not, and if the wind power plant main control system is in the operating state, the insulation detection command of the main control system is not responded.

Compared with the prior art, the method is combined with the reality, the insulation detection device is integrated in the wind power generation converter in the tower, meanwhile, the communication connection is established between the insulation detection system and the converter control system, and then the insulation detection and the insulation data acquisition can be remotely and directly ordered by the wind power plant main control system, so that the operation and maintenance personnel can diagnose quickly and efficiently, and the operation and maintenance pressure is reduced.

In summary, the preferred embodiments of the present invention are shown and described, and some modifications of the embodiments that may occur to those skilled in the art will embody the principles of the present invention and shall fall within the technical scope of the present invention.

Claims

1. The utility model provides an insulating detection device of integrated permanent magnet wind power generator stator winding which characterized in that: the detection device comprises a contactor KS1, a contactor KS3 and an insulation detection system, wherein when the generator is a single winding, the contactor KS1 is connected with a direct current output positive electrode end HV + and a stator winding I of the permanent magnet generator, and the contactor KS3 is connected with a direct current output negative electrode end HV-and a grounding end of the permanent magnet generator; insulating detecting system includes CAN communication circuit, ARM handles the chip, DO drive circuit, DCDC high voltage output circuit, sampling circuit, contactor drive circuit, CAN communication circuit passes through the CAN bus and the connection of converter control system, carry out the information interaction between CAN communication circuit and the converter, ARM handles the operation that the chip is used for insulating detection procedure, DO drive circuit is used for driving the relay on the veneer, then three contactor KS1 of relay drive and KS3, DCDC high voltage output circuit is used for exporting direct current high voltage signal, sampling circuit is used for the sampling of voltage and electric current, and then calculate insulation resistance value, three contactor KS1 of contactor drive circuit drive and KS 3.

2. The integrated permanent magnet wind generator stator winding insulation detection device according to claim 1, wherein: when the generator is the bifilar, detection device still includes contactor KS2 contactor KS2 connects direct current output positive terminal HV + and permanent magnet generator's stator winding two, and three contactor KS1, KS2 and KS3 of relay drive, and three contactor KS1, KS2 and KS3 of contactor drive circuit drive.

3. An integrated permanent magnet wind turbine stator winding insulation detection device as claimed in claim 2 wherein the DO drive circuit and contactor drive circuit cooperate such that when testing permanent magnet generator stator winding one, contactor KS1 and contactor KS3 are closed and when testing permanent magnet generator stator winding two, contactor KS2 and contactor KS3 are closed.

4. The integrated permanent magnet wind generator stator winding insulation detection device according to any one of claims 1-3, wherein the ARM processing chip is STM32F103RCT 6.

5. The insulation detection device for the stator winding of the integrated permanent magnet wind power generator as claimed in any one of claims 1-3, wherein the DCDC direct voltage output module is HO 1-P1251V-0.5D.

6. The integrated permanent magnet wind generator stator winding insulation detection device according to any one of claims 1-3, wherein in the sampling circuit, the sampling resistance of the voltage sampling circuit is 2 10K resistors of 0.1W, and the sampling resistance of the current sampling circuit is 2 1K resistors of 0.25W.

7. An integrated permanent magnet wind generator stator winding insulation detection device according to any of claims 1-3, characterized in that the communication mode before the converter system and the wind farm master control system is any of the following four modes: Profibus-DP protocol, CANopen protocol, INTERBUS protocol, Modbus protocol.