Substation Dc Power System Design And Reliability Research

In order to ensure the normal operation of power systems, power system uses a lot of control; protection, automatic devices, emergency lighting and other equipment, and most of these devices require DC power supply, so the DC power supply for the continued reliable and stable operation of power system security plays a vital role. DC power system of substation relay protection, automatic devices and the basic guarantee for the normal operation of circuit breakers, and its continued reliable operation of the system to prevent damage, accidents, serious damage to the expansion and equipment for the important role to play. How to strengthen the DC power system monitoring and fault analysis, and take appropriate measures to solve the power system needs to one of the issues. Therefore, the DC power system of substation design and study on reliability has important significance.In view of the present DC power supply of substation system's development request, to the new generation substation DC power supply system's function request, the principle of work and the system composition has carried on the discussion. Has analyzed the DC power supply system each module principle of work simply, then embarked from the whole has given the DC power supply system's overall design rule. Key has made the analysis to the DC power supply system earth question, this is creates the DC power supply system disoperation or resists the movement the substantial clause, and has studied the insulation monitor principle and realizes the method. The union actual analysis transformer substation appears after DC earth situation phenomenon and processing method. In view of the DC system reliable overall research, conducts the research first from the DC power supply protection electric appliance grading coordination question, stipulates related from the DC power supply protection electric appliance grading coordination embarks, summarizes induces several DC power supply protection electric appliance grading coordination the solution. Finally selected from DC system each part has conducted DC system's reliable research, because the accumulator cell choice, the charging and discharging unit select, the monitoring control unit establishment, the system wiring and aspects and so on operation protection device choice still had some influence DC power supply reliable problem. In besides the equipment technology quality aspect's question, will give some comments from the design shaping aspect DC power supply source reliable aspect.