Analyze distribution network structure and DMS function realization

Distribution network automation (DMS) has been going on for more than 30 years, but in our country, the development of distribution network automation is not going smoothly overall, and examples of fully successful implementation are relatively rare, which are required by DMS. The supporting environment is closely related.

First, power quality indicators

Many on-line power quality monitoring devices are now installed on the site, real-time monitoring of voltage, frequency fluctuations, waveform distortion, voltage surge and sudden drop and other indicators.

However, please note that the most important indicator of power quality is not these, but the continuity of power supply. At present, the pursuit of voltage qualification rate, frequency, and waveform indicators is a bit extravagant when continuous power supply is not yet fully guaranteed. But from the point of view of starting from two directions at the same time, it is worthy of recognition.

We should note that what is the greatest trouble for the majority of users? It is not these secondary indicators, but a sudden power outage without warning. Without electricity, all other indicators can be avoided. No water tower equipment was immediately shut down. The tap water system was under pressure. The hot water in the user's water tank was completely flushed back to the underground pump room, and the electricity bill was whitened several times. Therefore, the sudden power outage probability is the most important indicator of power supply quality. It is necessary to record the most important indicators such as the number of power outages, the longest time, and the accumulated power outage time throughout the year, and strive to improve them. It is better to achieve 365 days a minute. No blackout, let's talk about those secondary indicators.

The current primary goal of the DMS system is to minimize the number of outages and shorten the outage time.

Second, the DMS goal

The main goal of the DMS system, simply speaking, is to quickly isolate faults and restore power quickly, which is the most important for both supply and demand. The second is the economics of distribution network operation and other quality indicators.

Because for the power supply department, reducing the power supply time, that is, reducing the amount of power sold, is to reduce the output of the power grid in the same asset investment situation, which also reduces the benefits, but also caused trouble for the user; and this part Electrical energy is very important to the user. Because now is the age of the Internet, the number of home offices has increased. Some people draw CAD drawings at home. You suddenly lose power, and he works one hour at a time. He even has to consider UPS, which costs money. If every home office user must have a UPS, what is the price? Inadvertently, the power supply department has given power to consumers, and people have the right to sue you. In addition, the rapid restoration of power is equally important. You have been out of power for a long time and the high-rise households did not have enough water to drink because there are no towers. You are out of power for too long, SOHO owners have UPS can not support ah.