CN104319763A - Island intelligent power generation system based on multiple new energy resources - Google Patents

Abstract

The invention relates to an island intelligent power generation system based on various new energy sources. The island power generation system includes a weather condition monitoring system, an intelligent control system, an optimal power generation energy start-up system, a wind power generation device, a solar power generation device, a tidal power generation device, The wave energy generating device and the sea current energy generating device, the output end of the weather condition monitoring system is connected with the input end of the intelligent control system, and the output end of the intelligent control system is connected with the input end of the optimal power generation energy starting system, The output ends of the optimal power generation energy start-up system are respectively connected with each power generation device. This system uses a large amount of clean and renewable energy stored in the island and its nearby sea area, and starts different new energy power generation systems according to different climates and weather, which improves the reliability of power generation using new energy and solves the problem of island power supply costs. High problems, avoiding the environmental pollution problems caused by traditional power generation methods.

Description

An island intelligent power generation system based on multiple new energy sources

technical field

The invention belongs to the technical field of power equipment, and relates to a power generation system, in particular to an island intelligent power generation system based on various new energy sources.

Background technique

At present, the status of electricity consumption ⁱⁿ Chinese islands is as follows: China is a country with a vast sea area, and there are more than 6,000 islands with an area of more than 500 square meters in the country, of which about 94% are uninhabited islands; There are tens of thousands of islands and rocks; the total area of islands is about 80,000 km ² , accounting for 0.8% of the total area of the country, and the coastline of islands is as long as 14,000 km. 80% of the islands are distributed in the southeast coast—Zhejiang, Fujian and Guangdong provinces, 10% are distributed in the northeast coast—Shandong and Liaoning provinces, and 10% are distributed in Hainan, Taiwan and Guangxi provinces.

(1) Diesel generator set for power generation

The distance between these islands and the mainland in the southeast coast is generally 10 to 50 nautical miles, and the transportation with the mainland is by ship. Due to the lack of water resources on the islands and the difficulty of coal transportation, these islands usually use diesel generators to generate electricity.

According to the survey of relevant islands in Zhejiang and Fujian provinces, the electricity price of diesel power generation from January 1999 to June 2002 was 3 to 4.5 yuan/kW·h, and due to poor power generation efficiency, the power supply time is generally only 6 o'clock in the evening to 11 o'clock at night, see Table 1.

Table 1 Power supply information of some islands in Zhejiang and Fujian

island name permanent residents Diesel electricity price/yuan (kW·h) ^-1 Zhejiang Tanhushan Island 889 3.5 Nanji Island, Zhejiang 2913 3.0 Zhejiang Miaozi Lake Island 3000 3.0 Zhejiang Beiguan Island 413 3.5 Zhejiang West Lvhua Island 2228 3.5 Zhejiang Dayangshan Island 8972 3.0 East Fushan Island, Zhejiang 1184 3.5 Zhejiang Dayushan Island 3215 3.5 Fujian Beishuang Island 1800 4.5 Fujian Floating Eagle Island 1400 4.5

It can be seen from Table 1 that the lack of electricity and high electricity prices have seriously restricted the economic development of these islands, and the living standards of residents cannot be improved.

(2) Island power cable transmission

Submarine power cables are mainly used to transmit high-power electric energy underwater, and have the same function as underground power cables, but the application occasions and laying methods are different.

The submarine cable project is recognized as a complex and difficult large-scale project by countries all over the world. Complex technologies are used in environmental detection, marine physical investigation, and cable design, manufacture and installation. Therefore, there are not many submarine cable manufacturers in the world. There are Norway, Denmark, Japan, Canada, the United States, Britain, France, Italy and other countries. In addition to manufacturing, these countries also provide laying technology.

At present, the submarine power cables used in our country still need to be imported. Submarine cables are long and expensive, and it is difficult to supply power to islands through submarine power cables in my country.

The high electricity price makes the living cost of fishermen on the island far higher than that on the mainland, which not only seriously restricts the improvement of people's livelihood on the island, but also restricts the further development and construction of the island and the development of the marine economy.

At present, the development speed of new energy has been very fast, and the development of related new energy is as follows:

(1) Wind power generation

Wind energy is a clean and renewable energy source. Our country is extremely rich in wind resources. The average wind speed in most areas is above 3 meters per second, especially in coastal islands. The average wind speed is even higher; The coastal islands in China are very suitable for using wind power generation according to local conditions and have great potential. However, considering climate and weather factors, wind power supply is unstable and less controllable.

(2) Solar power generation

The solar energy irradiated on the earth is very huge, and the solar energy irradiated on the earth in about 40 minutes is enough for the energy consumption of human beings all over the world for one year. It can be said that solar energy is truly inexhaustible and inexhaustible energy. Moreover, solar power generation is absolutely clean and does not produce pollution. So solar power is known as an ideal energy source. However, there are also disadvantages in solar power generation. ①The energy distribution density of irradiation is small, that is, it will occupy a huge area; ②The energy obtained is related to the weather conditions such as four seasons, day and night, and cloudy or sunny.

(3) Tidal power generation

Tide is a kind of renewable energy with huge reserves, inexhaustible supply, no need for mining and transportation, clean and pollution-free. The construction of tidal power stations does not require immigration, does not submerge the land, and has no environmental pollution problems. However, there are also disadvantages in tidal power generation. The tidal range and water head often change within a day. Without special adjustment measures, the output is intermittent, which brings inconvenience to users. There are semi-monthly changes in the tide, and the difference in tidal range can be doubled, so the guaranteed output and the annual utilization hours of the installed capacity are also low.

(4) Wave energy power generation

Wave energy has the advantages of high energy density and wide distribution. It is an inexhaustible renewable clean energy. Especially in the winter when energy consumption is large, the wave energy energy that can be utilized is also the largest. Low-power wave energy power generation has been popularized and applied in navigation buoys and lighthouses.

my country has vast marine resources, the theoretical storage capacity of wave energy is about 70 million kilowatts, and the energy flow density of coastal wave energy is about 2 kilowatts to 7 kilowatts per meter. In places with high energy flow density, the energy flow of waves outside 1 meter of coastline is enough to provide lighting for 20 families.

(5) Ocean current power generation

Current energy refers to the kinetic energy of seawater flow, mainly referring to the relatively stable seawater flow in submarine channels and straits and the regular seawater flow caused by tides. The energy of ocean current energy is proportional to the square of the flow velocity and the flow rate. Ocean current power generation relies on the impact of ocean currents to rotate water turbines, convert them into high-speed rotating mechanical energy, and drive generators to generate electricity.

From this, it can be seen that when the existing power generation system cannot fully meet people's needs, a power generation system based on the above-mentioned multiple new energy sources can be developed according to local conditions.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a simple structure, easy to use, use a large amount of clean and renewable energy stored in the island and its nearby sea area, solve the problem of high power supply cost of the island, avoid The environmental pollution problems caused by traditional power generation methods can avoid the impact of marine pollution on fisheries, and the island intelligent power generation system based on a variety of new energy sources.

The technical scheme that the present invention solves technical problem adopts is:

An island power generation system based on multiple new energy sources, the island power generation system includes a weather condition monitoring system, an intelligent control system, an optimal power generation energy start-up system, a wind power generation device, a solar power generation device, a tidal power generation device, and a wave power generation device and the ocean current power generation device, the output end of the weather condition monitoring system is connected to the input end of the intelligent control system, the output end of the intelligent control system is connected to the input end of the optimal power generation energy starting system, and the optimal The output ends of the power generation energy starting system are respectively connected with the wind power generation device, the solar power generation device, the tidal power generation device, the wave power generation device and the ocean current power generation device.

Moreover, the weather condition monitoring system can monitor the weather conditions around the system, and then input the relevant weather condition monitoring information into the intelligent control system, and the intelligent control system can determine according to local conditions according to different climates, weather, and weather changes. The best power generation energy, and then input the control signal to the best power generation energy start system, the best power generation energy start system will start the best new energy power generation device to generate electricity.

Advantage and positive effect of the present invention are:

1. The island power generation system uses a large amount of clean and renewable energy stored in the island and its adjacent sea areas. According to different climates and weather, different new energy power generation systems are activated according to local conditions, ensuring the stability of the island's power supply and improving the use of new energy. reliability.

2. Through the intelligent control system, the island power generation system reasonably controls the power generation cycle of different new energy according to the characteristics of new energy supply, solves the problem of insufficient power supply of the island, and solves the problem of high cost of island power supply.

3. The use of new energy in the island power generation system will not cause environmental pollution caused by diesel generators, and prevent and avoid environmental pollution caused by traditional power generation methods.

4. This island power generation system can achieve considerable economic benefits. According to the information, the electricity price for island residents is about 3 yuan/kWh, which is 3-4 times that of the mainland, and the electricity price for commercial and other industries is higher. The average price of fresh water for living in islands is as high as 7-8 yuan per ton, far higher than the price of mainland water; China has more than 6,500 islands with an area of more than 500 square meters, with a total area of more than 6,600 square kilometers, of which 455 islands have a population of more than 4.7 million; Based on the calculation of the population of 5 million islands, after checking the relevant information, the daily electricity consumption of 5 million people is about 100 million kwh, that is, the power supply can be increased by 100 million kwh per day through this power generation system.

Description of drawings

Fig. 1 is a schematic diagram of the system connection of the present invention.

Detailed ways

Hereinafter, the present invention will be further described in detail by taking the embodiment of the accompanying drawings as an example. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

In order to further understand the content, features and effects of the present invention, the following examples are given and described in detail with reference to the accompanying drawings. It should be noted that this embodiment is descriptive, not restrictive, and cannot thereby limit the protection scope of the present invention.

An island intelligent power generation system based on multiple new energy sources, as shown in Figure 1, the island power generation system includes a weather condition monitoring system, an intelligent control system, an optimal power generation energy start-up system, wind power generation devices, solar power generation devices, tidal energy Power generating device, wave energy generating device and sea current energy generating device, the output end of the weather condition monitoring system is connected with the input end of the intelligent control system, and the output end of the intelligent control system is connected with the input end of the optimal power generation energy starting system connected, the output end of the optimal power generation energy start-up system is respectively connected with a wind power generation device, a solar power generation device, a tidal power generation device, a wave power generation device and an ocean current power generation device;

The weather condition monitoring system can monitor the weather conditions around the system, and then input relevant weather condition monitoring information into the intelligent control system, and the intelligent control system can determine the best Power generation energy, and then input the control signal to the optimal power generation energy start-up system, the best power generation energy start-up system will start the best new energy power generation device, that is, to generate electricity, this system ensures the stability of the island's power supply and improves the utilization Reliability of new energy power generation.

The above intelligent control system can start different new energy power generation devices according to weather changes:

(1) For solar power generation devices, use it as the main source of power generation on sunny days, and use other power generation devices at night and on cloudy days;

(2) For wind power generation devices, when the wind is strong, use it as the main source of power generation to supply islands with electricity, and when the wind is small, use other power generation devices;

(3) For the tidal power generation device, according to the change of the tide, determine whether it supplies power to the island;

(4) As a relatively stable new energy source, wave energy can be used as a guaranteed power generation device. When other power generation devices cannot provide stable power, wave energy can be used as a basic power supply source;

(5) Ocean current energy refers to the kinetic energy of seawater flow, which changes steadily and regularly. Relying on the impact of ocean currents to rotate the water turbine and drive the generator to generate electricity. Ocean current energy, like wave energy, can be used as the basic source of power supply for some special islands.

Claims (2)

1. An island intelligent power generation system based on multiple new energy sources, characterized in that: the island power generation system includes a weather condition monitoring system, an intelligent control system, an optimal power generation energy starting system, a wind power generation device, a solar power generation device, a tidal energy Power generating device, wave energy generating device and sea current energy generating device, the output end of the weather condition monitoring system is connected with the input end of the intelligent control system, and the output end of the intelligent control system is connected with the input end of the optimal power generation energy starting system The output ends of the optimal power generation energy start-up system are respectively connected with wind power generation devices, solar power generation devices, tidal power generation devices, wave power generation devices and ocean current power generation devices. 2. The island intelligent power generation system based on multiple new energy sources according to claim 1, characterized in that: the weather condition monitoring system can monitor the weather conditions around the system, and then input relevant weather condition monitoring information into the intelligent control system In the system, the intelligent control system can determine the optimal power generation energy according to different climates, weather, and weather changes, and then input the control signal to the optimal power generation energy start system, and the optimal power generation energy start system will start the most The best new energy power generation device for power generation.