Technical characteristics of distribution automation system of Zibo Electric Power Bureau

Abstract: The information on the technical characteristics of the distribution automation system of the Zibo Electric Power Bureau is provided by the excellent manufacturers of flowmeters and flowmeters. Introduction The concept of distribution automation was put forward by western developed countries in the 1970s, and has been fully developed in Japan, Europe and the United States. In recent years, my country has also carried out a lot of pilot work, and on this basis, the 'Automation Design of Power Distribution System' has been formulated. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the technical characteristics of the distribution automation system of Zibo Electric Power Bureau. Introduction The concept of distribution automation was put forward by western developed countries in the 1970s, and has been fully developed in Japan, Europe and the United States. In recent years, my country has also carried out a lot of pilot work, and on this basis, the 'Guidelines for the Design of Power Distribution System Automation' has been formulated. The distribution automation system (DAS) belongs to the distribution management system (DMS) in the vertical structure, and is closely related to the dispatching automation and power MIS in the horizontal direction. , The improvement of the whole process is the basis for realizing huge economic benefits. On the basis of satisfying economic and market development and changes, Zibo Electric Power Bureau has established a distribution automation system that is user-oriented and adapts to the level of economic development. 1 The whole-line quick-break fault isolation and restoration of power supply feeder automation are the core of distribution automation. The fault handling of feeder automation in Zibo Electric Power Bureau relies on multiple FTUs on the feeder, as well as substations, switching stations, and distribution automation master stations. The above parts are regarded as an inseparable whole to solve the problem of fault isolation. Three-phase short-circuit and phase-to-phase short-circuit and disconnection faults in feeder faults require fast isolated fault handling. The specific design is as follows: a. Phase-to-phase, grounding faults and disconnection faults in the downstream side (power outflow side) of the column load switch are located according to the fault information, voltage and three-phase fault current value provided by the column switch FTU. b. The interphase short-circuit fault and disconnection fault on the downstream side of the load switch of the switchgear and the circuit breaker are located according to the three-phase or two-phase fault current value provided by the FTU of the switchgear. c. When the equipment on the column is operated in the mode of load switch, the fault location is started by the following methods: ①The reclosing of the feeder outlet switch of the power station is started by the unsuccessful signal of reclosing (phase-to-phase short circuit of the neutral point ungrounded system); ②It is installed in the substation by The signal of the single-phase grounding detection device is activated (the single-phase grounding fault of the neutral point ungrounded system), and the signal of the grounding line selection device in the substation is used as the auxiliary judgment information for fault location; ③ When there is no such activation signal, the feeder FTU is used The fault information received in the normal polling cycle is activated; ④ After the fault occurrence section is determined, the trip command of the load switches on both sides of the fault will be automatically issued (or suggested) to isolate the fault section. If the fault section is cut off by the circuit breaker protection , the fault does not necessarily occur on the line segment connected to the downstream side of the circuit breaker (the selectivity of protection is not easy to achieve), and the position of the switch that isolates the fault needs to be determined after positioning. After the fault segment is isolated, the outlet switch closes the outlet switch for the healthy segment upstream of the fault segment; for the healthy segment on the downstream side of the fault segment, the possibility of more than one reverse path will be considered when selecting the power supply restoration scheme. The principle of no overload and the terminal voltage is not lower than the lower limit, a plan for restoring the power supply is proposed. The realization of full-line quick-disconnection fault isolation and power supply recovery functions makes the lines that originally had full-line power outages partially outaged. If a line is divided into 3 sections for calculation, each section is 2MVA, and each power outage is calculated as 1h. After the fault is isolated, 2 sections of the 3 sections restore power supply, which can reduce the power loss to 3.2MW. h ~ 3.8MW. h, resulting in significant economic benefits, reducing the time of user failure and power outage, and improving the reliability of power supply. 2. Use the automated equipment on the column to accurately test the ground fault of the low-current grounding system. Most of the distribution networks in my country are low-current grounding systems. When a single-phase grounding fault occurs, the regulations allow the operation to continue for 2 hours. In practice, it may be caused by overvoltage. Accidents such as cable explosion and voltage transformer burnout. Therefore, quickly determining the grounding position is of great significance to the safe operation of the feeder system.

Beijing Sincerity Automatic Equipment Co., Ltd is devoted to satisfy our customers with a wide array of the finest using experience.

Beijing Sincerity Automatic Equipment Co., Ltd assures you that you will be satisfied with its results and humbly request you to try this. We are hoping for a better business deal with you.

Although the core manufacturing factor of mass flow meter is high technology, smart customers know that we need to enhance our material quality and producing standard.

We persevere in keeping the customers pleasant and supporting them with mass flow meter at a reasonable price.