这是描述信息

Service Hotline: 0514-87520111

新闻资讯  News Center

Check category

contact us

Yangzhou Ke Yu Electric Power Co., Ltd.

Address: No. 97, Zhongxin Road, Automobile Industrial Park, Yizheng City, Yangzhou City
Phone: 0514-87520111

E-mali:keyudl09@126.com
Website: www.keyudl.com

>
>
>
Future trends in microgrid and multi-energy complementary technologies

Future trends in microgrid and multi-energy complementary technologies

  • Categories:News Center
  • Author:
  • Origin:
  • Time of issue:2020-11-26 15:25
  • Views:

(Summary description)For a long time, micro-grid has emphasized more distributed characteristics. Whether it is connected to a large power grid or not

Future trends in microgrid and multi-energy complementary technologies

(Summary description)For a long time, micro-grid has emphasized more distributed characteristics. Whether it is connected to a large power grid or not

  • Categories:News Center
  • Author:
  • Origin:
  • Time of issue:2020-11-26 15:25
  • Views:
Information
For a long time, micro-grid has emphasized more distributed characteristics. Whether it is connected to a large power grid or not, self-management and self-control are its typical characteristics. Regardless of the definition, the microgrid is still inseparable from the attributes of its power grid, and it must also comply with some golden rules in power grid design. Among them, safety and stability are undoubtedly the most important standards. In order to ensure safety while accessing a high proportion of distributed renewable energy, the most important thing is the flexibility of the system.
Under the framework of flexibility, the definition and development trend of microgrid in various countries are also slightly different. In July, my country issued the "Trial Measures for Promoting the Construction of Grid-connected Microgrid", which gave the official definition of microgrid. . Today we are introducing a series of development trends in the construction of microgrids in the United States. The core of which is the cogeneration equipment system. The coupling of heat and power on the consumer side and the decoupling of the production side will easily solve a series of flexible microgrids. Sexual issues.
 
 
In many microgrid construction practices in the United States, the following trends and standards for future microgrid construction have been summarized:
1. Energy efficiency first, reject waste
What is the cheapest and cleanest electricity? Many people would say it is renewable energy electricity. But in fact, the electricity that is wasted in the process of energy production, transportation and consumption is the part that we should pay most attention to. A recent report by the ACEEE organization pointed out that the average cost of generating one kilowatt-hour of electricity through energy-saving measures and energy-efficient equipment is around 2.8 cents, equivalent to 17 cents in RMB. Compared with my country's coal power generation cost of about 35 cents, the power generated by the energy upgrade is very competitive.
 
 
2. Cogeneration, multi-energy complementary Cogeneration, as its name suggests, is an energy production method that simultaneously produces heat and electricity. The waste heat in the power generation process is reused and heated, domestic hot water, industrial heating and even converted into cold energy through absorption refrigeration equipment. This coupled energy production method can increase the energy efficiency utilization rate to 80%, and the same fuel is used to produce electricity and heat separately at a maximum efficiency of 45%. At present, as the miniaturization technology of gas turbines has matured, high-efficiency cogeneration equipment can also become the core component of distributed energy supply.
 
 
There are also several important reasons that make cogeneration equipment gradually become one of the indispensable components in microgrid design:
If the simultaneous production of heat energy is not considered, the cost of generating electricity from a small gas turbine is usually higher than the cost of purchasing electricity from the grid. Only the integrated energy cost after thermal energy is more competitive;
The reliability of cogeneration equipment is higher than that of renewable energy, and it has high flexibility;
Combined heat and power equipment can also be used as emergency power sources for many elevators and water pumps. If this type of power is only provided by batteries, it cannot guarantee sufficient safety.
Another important reason is that the storage of thermal energy is much easier than the storage of electrical energy, and the fluctuation of the thermal load is smaller than that of the electrical load. The additional installation of heat storage equipment in the cogeneration equipment can realize the decoupling of thermal power production, providing More flexibility. The storage capacity of the heating network itself also provides a certain degree of toughness for the system. Among the various current microgrid design models, the thermoelectric multi-energy complementary mode is the most cost-effective, and there is no one.
3. Wind and wind complementation and clean power. Under the current technological level, cogeneration equipment will become the core of the microgrid system. At the same time, wind power and photovoltaic will also become an important part of microgrid power generation in areas where conditions permit. In the practice of many microgrid projects in the United States, cogeneration usually accounts for 80% of the power generation capacity, and wind power and photovoltaics bear the remaining 20%. In the future, as the cost of renewable energy power generation continues to decrease and the development of new technologies, the proportion of renewable energy power generation will continue to increase.
The advantage of renewable energy power is naturally zero-emission clean power, and there is no need to build additional fuel transportation channels. The disadvantages are also very obvious. In the absence of sufficient energy storage equipment, the stability of energy supply is greatly affected. challenge.
4. Energy storage is necessary to ensure safety In order to alleviate the intermittent power generation and load-side fluctuations of wind power and photovoltaic in the microgrid system, energy storage equipment has become the standard configuration of most microgrids. The energy storage equipment here not only refers to batteries, but also includes the storage of different types of energy media such as heat storage and gas storage. While the cost of batteries as a large-scale energy storage device is still high, other types of energy storage devices can be used more in multi-energy complementary microgrid projects.
 
 
At present, most of the energy storage equipment for microgrid projects is still used to smooth the user load curve and make up for the shortfall in electricity generation and consumption within the day and week. There is no better integration plan for long-term seasonal energy storage equipment.
In general, the design and planning of microgrids must fully consider local resource endowments and user needs, take the safety and reliability of system energy supply as the first standard, and then consider economy and environmental friendliness on this basis. The design should not only consider the balance of energy supply and demand, but also the balance between equipment that can provide flexibility and equipment that consumes flexibility.