阅读说明：本技术 气体稳压装置及风力发电变流器水冷系统 (Gas pressure stabilizer and water cooling system of wind power generation converter ) 是由 廖益蓝 王加明 许俊 郑登升 路世康 赵盛国 恽强龙 谢小冬 姜波 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种气体稳压装置及风力发电变流器水冷系统,气体稳压装置包括顺次相连的气体压缩机、第二电磁阀、第一压力传感器、排气阀和缓冲罐,以及第一电磁阀；第一电磁阀的进气口与气体压缩机和第二电磁阀之间的管路相连通；当第一压力传感器监测到缓冲罐内的压力低于预设的补气压力时,则关闭第一电磁阀,打开第二电磁阀,启动气体压缩机给缓冲罐进行补气；当第一压力传感器监测到的压力高于预设的停止压力时,则开启第一电磁阀,对气体压缩机出口进行泄压,同时关闭第二电磁阀和气体压缩机。本发明可以实现系统的自动补气、排气功能,可靠性高,克服了系统需要频繁人工补气的问题,自动化程度高,更加适用于目前无人值守、位置偏远的风电系统。(The invention discloses a gas pressure stabilizing device and a water cooling system of a wind power generation converter, wherein the gas pressure stabilizing device comprises a gas compressor, a second electromagnetic valve, a first pressure sensor, an exhaust valve, a buffer tank and a first electromagnetic valve which are sequentially connected; the air inlet of the first electromagnetic valve is communicated with a pipeline between the gas compressor and the second electromagnetic valve; when the first pressure sensor monitors that the pressure in the buffer tank is lower than the preset air supplement pressure, the first electromagnetic valve is closed, the second electromagnetic valve is opened, and the gas compressor is started to supplement air to the buffer tank; when the pressure monitored by the first pressure sensor is higher than the preset stop pressure, the first electromagnetic valve is opened to release the pressure of the outlet of the gas compressor, and the second electromagnetic valve and the gas compressor are closed at the same time. The invention can realize the automatic air supply and exhaust functions of the system, has high reliability, overcomes the problem that the system needs frequent manual air supply, has high automation degree, and is more suitable for the existing unattended wind power system with remote position.)

1. A gas pressure stabilizing device, comprising: the device comprises a gas compressor, a second electromagnetic valve, a check valve, a first pressure sensor, an exhaust valve, a buffer tank and a first electromagnetic valve which are connected in sequence;

the gas inlet of the first electromagnetic valve is communicated with a pipeline between the gas compressor and the second electromagnetic valve;

when the first pressure sensor monitors that the pressure of the buffer tank is lower than the preset air supplement pressure, the first electromagnetic valve is closed, the second electromagnetic valve is opened, and the gas compressor is started;

when the first pressure sensor monitors that the pressure of the buffer tank is higher than the preset stop pressure, the first electromagnetic valve is opened to release the pressure of the outlet of the gas compressor, and the second electromagnetic valve and the gas compressor are closed at the same time.

2. A gas pressure regulating device according to claim 1, characterized in that: the gas pressure stabilizing device further comprises a gas inlet filter element, and the gas inlet filter element is arranged at the gas inlet of the gas compressor.

3. A gas pressure regulating device according to claim 1, characterized in that: the gas pressure stabilizing device further comprises a check valve, and the check valve is arranged between the second electromagnetic valve and the exhaust valve.

4. A wind power generation converter water cooling system is characterized by comprising: a circulation pump, a valve, an air cooler, a circulation line, a water replenishing line, and the gas pressure stabilizing device according to any one of claims 1 to 3;

the inlet end of the circulating pump is connected with the wind power generation converter, and the outlet end of the circulating pump is connected with the inlet end of the valve; the inlet end of the air cooler is connected with one of the outlet ends of the valves, and the outlet end of the air cooler is connected with the inlet end of the circulating pipeline;

the inlet end of the circulating pipeline is also connected with the other outlet end of the valve, and the outlet end of the circulating pipeline is used for being connected with the wind power generation converter;

two ends of the water replenishing pipeline are respectively connected with the outlet end of the circulating pipeline and the circulating pump;

and the gas pressure stabilizing device is connected with the water replenishing pipeline.

5. The water cooling system for the converter of wind power generation as claimed in claim 4, wherein the water supply pipeline comprises: a raw water pump, a raw water tank and a water replenishing pump which are connected in sequence;

the raw water pump is used for connecting a water source;

the outlet end of the water replenishing pump is connected with the buffer tank of the gas pressure stabilizing device, and the inlet is connected with the raw water tank.

6. The wind power converter water cooling system of claim 4, wherein said wind power converter water cooling system comprises 2 independent circulation pumps, wherein one of said circulation pumps is a main circulation pump and the other is a backup circulation pump.

7. The wind power converter water cooling system according to claim 4, further comprising a first temperature sensor and a second temperature sensor;

the first temperature sensor is arranged at the outlet end of the circulating pipeline;

the second temperature sensor is provided at an inlet end of the circulation pump.

8. The water cooling system of the wind power converter according to claim 4, wherein: and a second pressure sensor is arranged at the outlet end of the circulating pump, so that the outlet pressure of the circulating pump is monitored in real time.

9. The water cooling system of the wind power converter according to claim 4, wherein: the wind power generation converter water cooling system further comprises a filter, and the filter is connected with the outlet end of the air cooler.

10. The water cooling system of the wind power converter according to claim 4, wherein: the valve is an electric three-way valve or a temperature control valve.

Technical Field

The invention belongs to the technical field of voltage stabilizing devices, and particularly relates to a gas voltage stabilizing device and a water cooling system of a wind power generation converter.

Background

China has rich wind energy resources, and the wind energy has the characteristics of cleanness, reproducibility and the like, and is increasingly paid attention. In recent years, the wind power industry in China is rapidly developed, and newly increased installed capacity lasts for many years and is the first global place. The current wind power generation technology is developing towards the direction of single machine power increase, the converter is used as a main heating component and needs to be cooled in time, and water cooling is the most efficient cooling mode at present.

Most of the existing water cooling systems for wind power converters adopt an expansion tank to stabilize the system pressure, when the system pressure fluctuates, gas in the expansion tank is compressed or expanded until the gas pressure in the expansion tank and the water pressure of the system reach balance, and the expansion tank plays a role in regulating and balancing the system pressure in the process.

The expansion tank is pre-filled with gas at a certain pressure when the expansion tank leaves a factory, but after the expansion tank works for a long time, the gas nozzle of the expansion tank is easily damaged and further loses the gas, so that the system cannot work normally, and in addition, the gas supplementing operation is required. The existing wind power generation system is generally remote in position and is unattended in daily life, and the phenomena of air leakage of an expansion tank, air supplement and the like are extremely inconvenient.

Disclosure of Invention

Aiming at the problems, the invention provides a gas pressure stabilizing device and a water cooling system of a wind power generation converter, which can realize the automatic air supply and exhaust functions of the system, have high reliability and high automation degree, overcome the problem that the system needs frequent manual air supply, and are more suitable for the existing unattended and remote wind power system.

In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:

in a first aspect, the present invention provides a gas pressure stabilizing device comprising: the device comprises a gas compressor, a second electromagnetic valve, a check valve, a first pressure sensor, an exhaust valve, a buffer tank and a first electromagnetic valve which are connected in sequence;

the gas inlet of the first electromagnetic valve is communicated with a pipeline between the gas compressor and the second electromagnetic valve;

when the first pressure sensor monitors that the pressure of the buffer tank is lower than the preset air supplement pressure, the first electromagnetic valve is closed, the second electromagnetic valve is opened, and the gas compressor is started;

when the first pressure sensor monitors that the pressure of the buffer tank is higher than the preset stop pressure, the first electromagnetic valve is opened to release the pressure of the outlet of the gas compressor, and the second electromagnetic valve and the gas compressor are closed at the same time.

Optionally, the gas pressure stabilizing device further comprises a gas inlet filter element, and the gas inlet filter element is arranged at the gas inlet of the gas compressor.

Optionally, the gas pressure stabilizing device further comprises a check valve disposed between the second solenoid valve and the exhaust valve.

In a second aspect, the present invention provides a water cooling system for a wind power converter, comprising: a circulation pump, a valve, an air cooler, a circulation pipeline, a water replenishing pipeline, and the gas pressure stabilizing device of any one of the first aspect;

the inlet end of the circulating pump is connected with the wind power generation converter, and the outlet end of the circulating pump is connected with the inlet end of the valve;

the inlet end of the air cooler is connected with one of the outlet ends of the valves, and the outlet end of the air cooler is connected with the inlet end of the circulating pipeline;

the inlet end of the circulating pipeline is also connected with the other outlet end of the valve, and the outlet end of the circulating pipeline is used for being connected with the wind power generation converter;

two ends of the water replenishing pipeline are respectively connected with the outlet end of the circulating pipeline and the circulating pump;

and the gas pressure stabilizing device is connected with the water replenishing pipeline.

Optionally, the water replenishing pipeline comprises: a raw water pump, a raw water tank and a water replenishing pump which are connected in sequence;

the raw water pump is used for connecting a water source;

the outlet end of the water replenishing pump is connected with the buffer tank of the gas pressure stabilizing device, and the inlet is connected with the raw water tank.

Optionally, the water cooling system of the wind power generation converter comprises 2 circulating pumps which are independently arranged, wherein one circulating pump serves as a main circulating pump, and the other circulating pump serves as a standby circulating pump.

Optionally, the water cooling system of the wind power converter further comprises a first temperature sensor and a second temperature sensor;

the first temperature sensor is arranged at the outlet end of the circulating pipeline;

the second temperature sensor is provided at an inlet end of the circulation pump.

Optionally, the outlet end of the circulation pump is provided with a second pressure sensor for monitoring the outlet pressure of the circulation pump in real time.

Optionally, the water cooling system of the wind power converter further comprises a filter, and the filter is connected with the outlet end of the air cooler.

Optionally, the valve is an electric three-way valve or a thermostatic valve.

Compared with the prior art, the invention has the beneficial effects that:

the gas pressure stabilizing system provided by the invention is matched with a water cooling system of a wind power generation converter in the practical application process, can solve the problems of easy air leakage, trouble air supply and the like of an expansion tank of a conventional converter cooling system, can realize automatic air supply and exhaust of the system, has high automation degree, and improves the reliability of the system.

The wind power generation converter water cooling system adopts the gas pressure stabilizing system to replace an expansion tank to stabilize the pressure of the system, manual air supplement is not needed, the adaptability of the converter cooling system in remote areas and under the unattended condition can be obviously improved, and the application range of the system is expanded.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view showing the structure of a gas pressure stabilizer in example 1;

fig. 2 is one of the schematic structural diagrams of the water cooling system of the wind power generation converter in embodiment 2;

FIG. 3 is a second schematic structural diagram of a wind power generation converter water cooling system in embodiment 2;

wherein:

1-1-main circulating pump, 1-2-standby circulating pump, 2-second pressure sensor, 3-valve, 4-air cooler, 5-filter, 6-first temperature sensor, 7-converter, 8-second temperature sensor, 9-raw water pump, 10-raw water tank, 11-water replenishing pump, 12-air inlet filter element, 13-gas compressor, 14-first electromagnetic valve, 15-second electromagnetic valve, 16-check valve, 17-first pressure sensor, 18-exhaust valve and 19-buffer tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.