Large Power Plant Hair Become Group Protection Setting And Research

Due to the progress of science and technology,the continuous development of industrial level,the grid power supply capacity increased significantly,the power supply form are also changing,coal-fired generating units,however,is still the main source of electrical power supply,and the single unit capacity and automation level increasing,large supercritical coal-fired units still bear the seventy percent of the electricity supply in our country.Units increasing degree of automatic control on the other hand,need to configure the increasing complexity of equipment,have relatively improves the operation of coal-fired units control difficulty.Security guards of the relay protection for power plants and power systems,in ensuring the safe and stable operation of the whole system,play a vital role in the protection of the most important responsibility is to ensure that the devices are protected in the event of a failure of fast,reliable,sensitive and selective removal of fault point,the requirement on electricity for equipment of superior consummation or double relay protection device,this not only is of great significance for the reliable operation of power system,and can protect the important and expensive main equipment to reduce in various faults and abnormal operation of the equipment damage caused by,effectively improve the economic benefit.For specific engineering example,it needs to relay protection personnel on the choice of the principle of connection and reasonable configuration and equipment selection of some aspects,such as good command,must be based on a connection and the parameters of the main equipment and operation characteristics,to achieve the basic characteristic of the relay protection required.In terms of features with conflict exists but also follow the sensitivity and selectivity,first of all to ensure the sensitivity,no sensitivity or lose the significance of installing protection;Quickness and selective conflict,should give priority to satisfy the selectivity,but special cases can also consider quickly without selective action and take remedial measures.In recent years,with the accelerating process of industrialization in our country,our country electric power industry is also in constant progress,the networking environment to push in the country.Generator is the power source of the power system,it in electric power production,transmission and distribution,the role of power supply four link is very important,generator agencies are extremely complex,however,the price is very expensive,this makes the protection configuration by the generator is quite complex,protection configuration scheme will be according to the characteristics of the site's main connection mode and set the difference is different.A variety of reasons lead to the generator fault is difficult,setting calculation difficult.And the complexity of the plants involved in the equipment,Is precisely because the generator fault is difficult,setting calculation difficulties,seriously analyzing the characteristics of the thermal power plant operation,connection form and protection configuration,which set the right protection fixed value to ensuring safe and stable operation of the coal-fired units.In-depth analysis of coal-fired units of relay protection principle characteristic,familiar with the power plant running status,the configuration of large thermal power unit relay protection principle,the relay protection setting calculation process and the fixed value setting very meaningful.