• hisolar@cnhisolar.com
  • +86-13905874507
Request a Quote

wind power grid tie inverter

Introduction to the working principle and functions of wind power grid-connected inverters

The wind power grid-connected inverter is a key device connecting the wind power system and the power grid. It converts the variable-frequency alternating current (AC) generated by the wind turbine into fixed frequency and voltage AC that matches the power grid, achieving efficient grid connection of wind power. Generate electricity. The following is a detailed introduction to its working principle and functions:

working principle

  1. Energy conversion: Wind turbines are driven by wind to rotate and generate alternating current. The frequency and voltage of this kind of power are inconsistent with the grid standards and cannot be directly connected to the grid.
  2. DC conversion: The inverter first converts the alternating current (AC) generated by the wind turbine into direct current (DC). In this process, the voltage level can be adjusted and controlled to prepare for the next step of conversion.
  3. AC reconstruction: Through the built-in control algorithm, the inverter converts direct current (DC) into alternating current (AC) again, ensuring that the converted current has a fixed frequency and voltage that matches the grid.
  4. Grid connection: The inverter transmits the converted power to the grid through the grid connection interface, while monitoring the voltage and frequency of the grid to ensure the stability and safety of power transmission.

 

The main function

  • Maximum Power Point Tracking (MPPT): Automatically adjusts the operating status to ensure that the wind turbine can generate maximum power at different wind speeds.
  • Grid matching: Convert electrical energy into frequency and voltage that meet grid standards to ensure power quality.
  • System protection: In the event of grid failure or abnormality, it can quickly disconnect from the grid to protect the safety of the wind power generation system and grid.
  • Remote monitoring: Supports remote monitoring function, operation and maintenance personnel can remotely check equipment status, perform fault diagnosis and system optimization.

 

The application of wind power grid-connected inverters not only improves the utilization efficiency of wind power, but also provides an important guarantee for the stable operation of the power system. Through efficient energy conversion and intelligent management, the inverter ensures the efficient, stable and safe integration of wind power generation into the power grid, laying the foundation for the widespread application of renewable energy.

Hisolar 20A Battery Charger 3

How to choose a suitable grid-connected inverter for wind power generation?

Choosing a suitable wind power grid-connected inverter is the key to ensuring efficient operation of the wind power system. Here are a few important factors to consider when choosing a grid-tied inverter:

1. The capacity of the inverter matches the fan
The capacity of the inverter should match the output power of the wind turbine. Generally speaking, the rated power of the inverter should be slightly higher than the maximum output power of the wind turbine to ensure that it is not overloaded at maximum wind output.
2. High efficiency
Choose an inverter with high conversion efficiency. The efficiency of the inverter directly affects the overall power generation efficiency and economy of the system. Generally, the conversion efficiency of an efficient inverter should be above 95%.
3. Maximum power point tracking (MPPT) function
Make sure the inverter has MPPT function, which can maximize the power generation of the wind turbine at different wind speeds. MPPT can adjust electrical parameters in real time so that the wind turbine always runs at the optimal operating point.
4. Grid compatibility
The inverter should be able to meet the local power grid access requirements, including frequency, voltage, and grid connection standards. In addition, good grid compatibility also includes the capability of low voltage ride through (LVRT) and high voltage ride through (HVRT) to ensure stable operation when the grid fluctuates.
5. Reliability and Durability
Choose products with guaranteed brands and quality to ensure the reliability and long-term stable operation of the inverter. Consider the protection level of the inverter to ensure that it can work normally in harsh outdoor environments.
6. Intelligent monitoring and fault diagnosis functions
The inverter should support remote monitoring and fault diagnosis functions to facilitate real-time monitoring of system status and timely response to system faults.
7. Cost-benefit analysis
Consider the overall cost of the inverter, including acquisition costs, installation costs, and long-term operation and maintenance costs. Choosing a cost-effective inverter can reduce overall investment and operating costs while ensuring system performance.
8. After-sales service
Consider the manufacturer’s technical support and after-sales service. Good after-sales service can provide quick and effective solutions when problems occur with the inverter, reduce downtime and ensure power generation efficiency.

Installation and Operation Guide

Installing and operating wind power grid-connected inverters is an important step in ensuring the safe and efficient operation of wind power systems. Below is a basic installation and operation guide:

Installation guide

1. Site selection and layout: Determine the installation location of the inverter. Usually, you should choose an indoor location that is well ventilated, dry and avoids direct sunlight. Taking into account the convenience of maintenance and monitoring, the accessibility of the installation location should be ensured.

2. Installation preparation: Prepare necessary installation tools and accessories according to the inverter installation manual. Ensure all components meet manufacturer’s specifications and requirements.

3. Installation and fixation: Fix the inverter in the predetermined position according to the instructions provided by the manufacturer. Make sure the inverter is installed securely to prevent vibration or displacement.

4. Wiring: Follow electrical safety regulations for wiring, including the connection of the wind turbine to the inverter, and the grid connection of the inverter to the power grid. All cables and wiring should comply with local electrical codes to ensure safety and reliability.

5. Grounding: Ensure that the inverter and the entire wind power system are well grounded to prevent electric shock accidents and electrical interference.

6. System check: Before turning on the power, perform a system check to ensure that all connections are correct and there are no loose or wrong wirings.

Operation guide

1. Check before starting up: Make sure the inverter and all connecting parts are installed correctly and are not loose or damaged. Check that electrical connections are secure and there is no risk of leakage or short circuit.

2. Start up: Follow the manufacturer’s instruction manual to start up the inverter. It usually includes turning on the power switch, setting operating parameters, etc.

3. Parameter configuration: Configure the operating parameters of the inverter according to the actual needs of the wind power system, such as maximum power point tracking (MPPT) settings, frequency and voltage adjustments, etc.

4. Daily monitoring: Use the monitoring function of the inverter to regularly check the operating status of the system, including power generation, efficiency, grid connection status, etc.

5. Maintenance and troubleshooting: Perform regular system maintenance to check the electrical connections and physical status of the inverter. When encountering a fault, refer to the manufacturer’s troubleshooting guide for troubleshooting and handling.

6. Shutdown and restart: When it is necessary to shut down or restart the inverter, follow the manufacturer’s instructions to ensure the safety and stability of the system.

What is the actual application effect of wind power grid-connected inverters in wind farms?

The application effect of wind power grid-connected inverters in wind farms is usually reflected in improving power generation efficiency, ensuring power quality, enhancing system stability and improving economy. Here are some specific performances:

1. Improve power generation efficiency

  • Maximum power point tracking (MPPT): The MPPT function of the grid-connected inverter can ensure that the wind power generation system can operate at the optimal power output point under different wind speeds, significantly improving the power generation efficiency of the entire system.
  • Reduce energy loss: High-efficiency inverters can reduce losses during the energy conversion process and ensure that more wind energy is converted into electrical energy.

2. Ensure power quality

  • Voltage and frequency adjustment: The inverter can convert the electric energy generated by the wind turbine into a voltage and frequency that matches the power grid, ensuring the quality of the power and meeting the access requirements of the power grid.
  • Harmonic control: Modern inverters usually have good harmonic control capabilities, which can reduce interference to the power grid and improve power quality.

3. Enhance system stability

  • Coping with grid fluctuations: Grid-connected inverters have the ability to quickly respond to grid fluctuations, such as low voltage ride through (LVRT) and high voltage ride through (HVRT), which can maintain stable operation during grid faults and enhance system stability.
  • Remote control and monitoring: Through the remote monitoring system, operation and maintenance personnel can monitor the operating status of inverters and wind farms in real time, adjust operating strategies in a timely manner, and optimize system performance.

4. Improve economy

  • Reduced operation and maintenance costs: High-quality inverters generally have a longer service life and lower maintenance requirements, thus reducing operation and maintenance costs.
  • Improve energy utilization: By improving the power generation efficiency and power quality of the wind power system, the economics of the wind farm is improved and the return on investment is increased.

5. Environmental impact

  • Promote the utilization of renewable energy: As a key equipment for wind power grid connection, the application of inverter promotes the utilization of wind energy, a clean and renewable energy, and helps reduce dependence on fossil energy and reduce greenhouse gas emissions.

Comparative analysis of wind power grid-connected inverters and independent power generation systems

Wind power grid-connected inverters and independent power generation systems (also known as off-grid systems) have obvious differences in wind energy utilization, and they are each suitable for different application scenarios and needs. The following is a comparative analysis of the two:

1. Differences in connection methods

  • Grid-connected inverter: Converts the electric energy generated by the wind power system into electric energy that meets the grid standards and transmits it directly to the grid. This method is suitable for areas covered by the grid and can seamlessly integrate wind power into the existing power system.
  • Stand-alone power generation systems: Off-grid systems typically feature batteries or other energy storage devices to store the electricity generated by wind turbines for use by a stand-alone facility or residence. Suitable for remote areas or places that cannot be covered by the power grid.

2. System complexity and cost

  • Grid-tied inverters: Generally speaking, the initial investment in grid-tied systems is relatively low because no additional energy storage equipment is required. However, the design, installation and grid connection of grid-connected systems may need to meet more stringent technical and regulatory requirements.
  • Independent power generation system: Off-grid systems require additional energy storage equipment (such as batteries) and possible backup energy (such as diesel generators), making the system more complex and requiring relatively high initial investment and maintenance costs.

3. Energy efficiency

  • Grid-connected inverter: It can achieve efficient energy conversion and transmission and reduce energy loss. The grid-connected system can transport excess electric energy to the power grid, improving energy utilization efficiency.
  • Independent power generation system: There is a certain energy loss during the storage and release of energy, but it provides the possibility of energy self-sufficiency, especially in areas where the power grid is unreliable or cannot be covered.

4. Stability and reliability

  • Grid-connected inverter: Its stability and reliability are affected by grid conditions. In the event of a grid failure, the wind power generation system will also cease operation for safety reasons.
  • Independent power generation system: It does not rely on the external power grid, so it can still provide power when the power grid is unstable or interrupted, increasing the reliability of the system.

5. Environmental impact

  • Grid-connected inverter: By reducing dependence on fossil energy, it helps reduce greenhouse gas emissions and has a greater positive impact on the environment.
  • Independent power generation system: Although it also reduces dependence on fossil energy, the production and disposal of energy storage equipment such as batteries may have a certain impact on the environment.

6. Economic analysis

  • Grid-connected inverter: In the long run, economic benefits can be achieved by selling electricity to the grid or saving electricity bills, especially suitable for areas with abundant wind resources.
  • Independent power generation system: Although the initial investment is high, for remote areas, it saves expensive grid expansion costs and electricity bills in the long term, and is suitable for long-term independent operation.

Maintenance and care methods

To ensure the stable operation and extend the service life of wind power grid-connected inverters, regular maintenance and upkeep are essential. Here are some basic care and maintenance methods:

1. Regular inspection

  • Visual inspection: Regularly inspect the appearance of the inverter to confirm that there is no obvious damage, corrosion or contamination.
  • Connection Check: Check that all electrical connections are tight and show no signs of looseness or wear. Check the terminal blocks and grounding system to ensure safety and reliability.
  • Cooling system inspection: Clean the fan and heat sink of the inverter to ensure that there is no dust blockage and maintain good heat dissipation performance.

2. Functional testing

  • Performance monitoring: Use the inverter’s monitoring system to regularly check its performance indicators, such as input and output voltage, current, frequency, etc., to ensure that the inverter is running at its best.
  • Protection function test: Regularly test the inverter’s protection functions, such as overload protection, short-circuit protection, etc., to ensure that these functions are working properly.

3.Software update

  • Firmware updates: Regularly check whether the manufacturer has released firmware updates for the inverter. Timely updates of the firmware can optimize the performance of the inverter and fix known problems.

4. Cleaning and maintenance

  • Clean the casing: Use a clean soft cloth to clean the casing of the inverter regularly and avoid using any chemical cleaners that may damage the surface of the inverter.
  • Heat sink cleaning: Regularly remove dust and other debris on the heat sink to maintain good heat dissipation.

5. Environmental inspection

  • Environmental monitoring: Monitor the temperature and humidity of the inverter installation environment to ensure that it works under the environmental conditions recommended by the manufacturer.

6. Professional maintenance

  • Professional maintenance: For complex problems or maintenance tasks that require professional equipment, professional service personnel should be contacted for inspection and maintenance.


By following the above care and maintenance methods, you can minimize the possibility of failure, extend the service life of the inverter, and ensure the efficient and stable operation of the wind power generation system. It is important that all maintenance and upkeep work follow the manufacturer’s guidance and recommendations to ensure safe and effective operation.

Table of Contents

Excellent! share to:

Improve again: high-quality power inverter and energy storage device

Contact us

Hisolar JingYing New Energy

A leading manufacturer of high-quality inverters and energy storage devices, our company has been providing reliable and innovative solutions for sustainable energy management for three decades.

Whatsapp Youtube Facebook-f Skype Linkedin Instagram

Products

Resources

Contact Info

Request a Quote