9, measures to reduce line loss What? A: Reduce line loss is an important work for power supply enterprises, the main measures to reduce line losses are: (1) do a good job of technical management of power supply, measurement management and electricity management. (2) reduce the transformer series. Each time a transformer about to consume 1% to 2% of active power, the more the transformer series, the greater the loss. (3) In-situ balance of reactive power, installation of the necessary number of reactive power compensation equipment in the power receiving area to reduce the number of reactive power transmission lines. (4) Appropriate change of lines and comprehensive planning. For some unreasonable transmission and distribution lines, such as overloaded or twists and turns of a long line, it should be properly rebuilt, if necessary, to build a second loop. (5) increase the voltage level of grid operation. When the power grid is operating, the maximum allowable working voltage for the insulation of electrical equipment such as lines and transformers shall not exceed 10% of the rated voltage in general. Therefore, when operating the power grid, the operating voltage level should be as high as possible under the above conditions To reduce power and power loss. If the line voltage is increased by 5%, the energy loss in the line is reduced by about 9%. (6) the best trend distribution. The economic load distribution of power system is mainly the distribution of active load between power plants. Not only active load, but also reactive load caused by line loss of power network, reasonably distributing scheduled active and reactive power load currents will further reduce the line loss of the power grid and meet the overall requirements of economic dispatch. 10, What are the main motor power-saving measures? A: (1) Newly purchased motor should first consider the selection of energy efficient motors, and then consider other performance indicators as needed, in order to save energy. (2) improve the efficiency of the motor itself, such as the motor from the cold fan to its cold fan, the load can be small or outdoor motor in winter, disable the cooling fan, help to reduce energy consumption. (3) change the stator winding into a star delta hybrid series winding, depending on the load conversion star connection or delta connection is conducive to improving the winding generated by the magnetomotive force waveform and reduce the winding current, to achieve energy-efficient purpose . (4) using other continuous speed control mode. Such as the use of pressure regulator, variable pole motor, electromagnetic coupling governor, frequency control device. (5) Replace the "Mara Car" motor, "Mara Car" In addition to waste of energy, the extremely vulnerable to damage to equipment. In addition, a reasonable adjustment of the motor supporting the use of the motor can run in a highly efficient work area, to achieve energy-saving purposes. (6) Reasonable installation of parallel low-voltage capacitors for reactive power compensation, effectively improve the power factor, reduce reactive loss and save energy. (7) From the joint to the meter and to the motor conductor cross-section should meet the current carrying capacity, and the wire should be shortened to reduce the wire resistance and reduce wear and tear. The above measures can be used separately, but also a number of simultaneous use. In short, the motor to take some necessary technical energy-saving measures, both safe and stable operation of the grid is beneficial, but also allows users to reduce electricity costs. 11, What are the main power transformer measures? A: The power-saving technology of the transformer is mainly divided into two parts: design and manufacturing and production operation. Design and manufacture of energy-saving technology is the use of new electromagnetic materials, new production technology developed and efficient energy-saving transformers, to transform and transform inefficient transformers. Energy-saving technologies in production operation utilize new technical means or strengthen operation and management so that the transformers often operate in high-efficiency areas. 12, the main fan what energy-saving measures? A: The measures to reduce fan power consumption are: ①Reasonable matching fan. Mainly refers to the choice of fan, the air volume and air pressure should meet the needs of the production process; ② the use of high efficiency fan; ③ fan speed control operation; ③ transformation fan. Mainly from changing the length of the fan blades, fan blades to change the material, reducing air duct resistance and so on. 13, pump energy-saving technologies are mainly what? A: The pump power saving measures and methods are: ①transformation inefficient pump. Mainly refers to the update or change the impeller, multi-stage pump with run-level operation, single-stage pump head is too high, the use of turning the impeller diameter approach; grinding impeller runner to improve flow smoothness, reduce head loss and improve maintenance and assembly quality , Regular operation and maintenance, to maintain a good seal to reduce leakage losses; ② reduce pipe resistance; ③ use a reasonable adjustment method; ④ reasonable selection. Including to determine the pump model, number of units, specifications, speed and supporting the motor and the corresponding adjustment. 14, electric heating equipment, energy-saving technologies have? A: The electric heating equipment energy-saving technologies are: ①the correct choice of electric furnace furnace. The correct choice of electric furnace furnace is basically do a good job of saving the guarantee; ② light body refractory insulation materials to reduce heat loss; ③ the use of advanced heating elements; ④ improve technology and equipment; ⑤ automatic control by computer; ⑥ strengthen management, organize the implementation of specialized centralized production. 15, What are the main electrical lighting energy-saving measures? A: The measures of lighting energy-saving are: ①selection of high-efficiency electric light and lamps. Under the premise of ensuring the quality of lighting, the fundamental measure to reduce lighting power consumption is to improve the efficiency of lighting equipment, that is, to improve the efficiency of light source and lighting; ② reasonable control of lighting time. Lighting time should be based on the need to grasp, with the use of open, which is an effective energy-saving measures; ③ make full use of natural light, make full use of sunlight is to achieve an important part of lighting energy-saving. 16, What are the main flow control device power saving measures? A: The main measures to reduce the loss of the converter device are: (1) Selection of self-cooled silicon converter device as far as possible, so as to reduce the power consumption of the cooling system. (2) The use of air-cooled silicon rectifier device, fan switch should be based on load and room temperature for automatic control. (3) The use of zinc oxide arresters instead of AC side RC overvoltage protection device. (4) For the double anti-star wiring rectifier, installation of automatic switching device according to the load changes. (5) For the traction rectifier, inverter can be installed in the rectifier station, the traction braking, the braking power input feedback to the grid, to cover part of the power loss. (6) According to the principle of least loss, make multiple rectifiers run side by side, so as to reduce rectifier loss and save electric energy, so that the converter achieves economic operation. 17, What are the main air-conditioning installation methods and measures for saving? A: The means of saving electricity and air conditioning unit are: (1) to reduce the air-conditioning cold and heat load. The main methods are: to improve the thermal performance and optical performance of the building envelope; the use of efficient cold light source, select the appropriate illumination, the use of key control switch to control the indoor main electrical appliances. (2) improve the operating efficiency of air conditioning unit. The main methods are as follows: selecting single-unit high-efficiency refrigerators, fans, pumps and motors and other equipment; single capacity and number of units can be matched with changes of cold (hot) load, implementing economic operation; adopting economical and reasonable speed regulation methods, The system remains in high-performance zone. (3) provide a reasonable temperature and humidity standards, the use of multi-function thermostat, the indoor air temperature and humidity to automatically adjust. (4) The duct insulation, eliminating air leakage, reducing the amount of circulating air system. (5) Recovery of exhaust cooling capacity (or heat), for the fresh air volume pre-cooling (or preheating). (6) The central air conditioning system can be used storage technology, which can be used ice (or chilled water) cooling mode of operation.
