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It is understood that this kind of Guodian Nanzi's high-voltage frequency conversion equipment allows the motor to automatically shift gears according to production needs, and the energy-saving efficiency is greatly improved, and the product price is only about 50% of the international similar products, realizing the breakthrough of localization of high-voltage frequency conversion equipment. Taking a 220 MW power plant as an example, the overall power saving efficiency of the high-voltage equipment will exceed 20%. Coupled with market demand in other heavy industry such as metallurgy, petrochemical, etc., the market capacity of high-voltage inverters in the country exceeds 100 billion yuan.
Status: The motor has done 30% "useless work"
Thermal power plants that use steam turbines require circulating water for cooling, while circulating water requires electric motor propulsion. When the electricity is low at night, the power plant will reduce the amount of power generation, and the demand for cooling water will decrease. Generally, once the motor is running, it will be in a fixed speed state, and the speed cannot be changed, thus causing a large amount of energy waste. At this time, if the inverter is added to the motor, the motor running power can be automatically adjusted to reduce energy consumption.
The data shows that more than 30% of the electricity used by industrial enterprises in China is the power consumption of various fans and pumps. Among them, more than 30% of the electricity consumption is ineffective. If all the high-voltage frequency conversion technology is adopted, the electricity is saved. According to the calculation of 30%, the annual electricity saving in the country can reach 75 billion kWh. At the same time, it can reduce the coal for power generation by 30 million tons, and reduce the emissions of 750,000 tons of sulfur dioxide and 18 million tons of carbon dioxide. R & D: high-voltage inverter localization to achieve breakthrough
[Nanjing Daily reported] It is precisely the high-voltage frequency conversion equipment that will bring huge economic benefits to enterprises. Since 2002, Guodian Nanzi has cooperated with Tsinghua University to develop high-voltage inverter equipment.
The technical threshold of high-voltage variable frequency speed control system is very high. The international mainstream manufacturers only have a few such as Siemens, Robin Kang and ABB. Zhang Yanan, general manager of Guodian Nanzi Frequency Conversion Division, said that Guodian Nanzi has adopted the most advanced technology in the world and can quickly and accurately adjust DC power to AC power at different voltages and frequencies. The multi-chip [integrated message] jointly developed with Tsinghua University is more stable.
Guodian Nanzi's high-voltage frequency conversion equipment has already outperformed similar products of some foreign companies in major technical indicators. For all the motors in the water plant, Guodian Nanzi has also developed automation software to detect the water demand of the end users in real time, adjust the motor speed in time, and let the water flow pumped by the pump meet the needs of the system. It is understood that Guodian Nanzi has carried out a number of optimization design for electric power, metallurgy, municipal and other industries, so that the high-voltage frequency conversion equipment and the automatic control system have achieved perfect docking.
Promotion: Let the buyer save the electricity bill
[Nanjing Daily reported] Imported motor supporting inverter equipment, it takes 5 years to recover equipment costs, so domestic enterprises use very low-voltage inverter equipment. After Guodian South came to market with the same type of products, one set was only over one million yuan. Generally, power generation enterprises buy and use them, and they can recover the cost in two and a half years. The industrial enterprises can recover the cost in one and a half years, which greatly improves the enthusiasm of enterprises to carry out frequency conversion energy-saving transformation. The Shangyuanmen Waterworks of our city has planned to add a frequency conversion equipment from Guodian Nanzi in October this year, and the frequency conversion of the China Cement Plant and Jiangnan Cement Plant in the city has also been put on the agenda.
In order to make enterprises more comfortable to use, Guodian Nanzi has launched a new payment model: two frequency conversion speed systems delivered to a power plant in October this year, an electric meter will be installed in front of the equipment to calculate its monthly power plant province. How much power is put down, the company will use the saved electricity bill to pay for the goods.
According to reports, the National Development and Reform Commission has listed "motor system energy conservation" as one of the "Eleventh Five-Year" top ten energy-saving projects. In order to promote energy conservation and emission reduction in power companies, the province is preparing to introduce relevant subsidy policies, and the power generation enterprises that are the first to install high-voltage inverter equipment are expected to receive higher government subsidies.
Guodian Nanzi high-voltage inverter makes the power plant save 20%
In June of this year, the high-voltage frequency conversion equipment developed by Guodian Nanjing Automation Co., Ltd. was installed on a 430-kilowatt pump motor of Yangzhou Power Generation Co., Ltd., and the highest power saving reached 55% during the low-peak period of nighttime water use. According to the on-grid price of 0.38 yuan per kWh, this set of equipment can save more than 440,000 yuan in electricity for Yangzhou Power Generation Company.