Yanbian Power Grid Enters Intelligent Times

At 0:00 on July 15th, the number of safe-running 8000-day computers just turned over on the electronic recorder in the dispatch office of Jilin Yanbian Power Supply Company. The on-duty dispatchers are laughing at each other, which not only marks their brilliant achievements, but also means that they will embark on a new journey.

Reminiscing about the past: Disposal equipment is backward, and the power grid is abnormally weak. “Now it is a far cry from the past. The past conditions can't be compared with the present.” Speaking of the changes in the dispatch, the former Yanbian Electric Power Bureau, which had been engaged in dispatching operations for 18 years, Chief Engineer Lien Lian filled with emotion.

According to Yang Liande, when he was doing dispatch work, the dispatcher relied on brain work, hand labor, and leg work. Hand-operated tickets are written by hand. When making a long-distance call, you must follow the post office to apply for the ticket number. The recording equipment will change from carousel and card type to telephone with recorder. "Now they can record on the computer on the telephone. It's good!" Yang Lied said with envy. In the past, duty watchers regularly read the meter, and the electricity was reported through the telephone. The relevant total power, average value, active power, and reactive power were calculated by hand. At the very beginning, a sticky plastic plate was used on the board to simulate the screen. Later, it became electronically integrated and able to simulate the operation. The current simulation screen is a mosaic, which can display currents, voltage changes in real time, and can reflect switch positions in real time. Variety.

Before the 1990s, due to the small scale of the Yanbian power grid, weak grids, and insufficient power supply, the power cuts in the Yanbian area were commonplace, except for frequent blackouts. The big power consumers took turns from Monday to Sunday. Because there are too many points of failure, the power-transmission workers are required to take a convertible and take dry food for several days.

“At that time, Yanbian was a fully-received power grid and was connected to only one line of the Jilin main network. When power is limited, it can only be run as a stand-alone network, and it is very difficult for the power grid to operate safely.” Yang Liande said, “When the Chinese New Year is used, we usually plan to use electricity. Ways to make the transition, but the people of the home still have a total power outage because the distribution network is also very weak and can't withstand any disturbance."

Look at the current situation: Speed ​​up the construction of power grids and improve the level of automation. “The dispatch automation system can accurately and regularly record various operational indicators, providing a reliable basis for us to correctly judge and quickly handle abnormalities and accidents.” Yanbian Power Company, a dispatcher Say.

According to statistics, by the end of 2010, the Yanbian area had one 500-kilovolt transformer substation, seven 220-kilovolt transformer substations, and sixty-six-kilovolt transformer substations. The substations with a capacity of 66 kilovolts and above reached 3.599 million kVA, and the line was 3068.8. km.

With the acceleration of power grid construction, Yanbian Power Grid has become increasingly strong, and the level of automation has been greatly improved. The safety management method has changed from a rough type to a lean one, and the reliability of power supply reliability indicators such as voltage and frequency has become higher and higher. Their own ability and quality requirements are also rising. A qualified dispatcher needs to understand the operation of the power grid and its equipment, be familiar with relay protection, automation, communications, and other professional knowledge, and be able to accurately analyze and determine the treatment of various phenomena.

In the face of sudden natural disasters such as freezing, high winds, and floods, Yanbian Power Grids have withstood severe tests, and no large-scale blackouts have occurred.

Looking forward to the future: building a strong smart grid, the grid has a self-healing function. After the new dispatching automation system is put into operation, it will implement functions such as intelligent dispatching, information management, electronic monitoring, and fault location. It can prompt anomalies in advance and help decision-making. The grid is equipped with a 'brain brain'," said Yanbian Power's dispatcher. On November 1st last year, the company laid the foundation for the dispatching communications building project integrating smart grid dispatching command and modern office.

“We are particularly looking forward to the self-healing function of the smart grid. If the grid can 'treat itself', how much work pressure we have to relieve!” This team of 40.3-year-old average dispatchers is looking forward to the future.

It is reported that in the "12th Five-Year Plan" period, Jilin Electric Power Co., Ltd. will invest 3.01 billion yuan to build a strong smart grid. By 2015, the Yanbian region will have two 500 kV substations, twelve 220 kV substations, and one 66 kilovolt transformer substation. The substation capacity of 66 kV and above will reach 5.444 million kVA and the line will be 4308.8 kilometers.

By the end of August next year, the 220 kV Antu and Longjing two smart substations will be completed and delivered. By then, the Yanbian region will achieve the planning goal of a 220-kilovolt substation for each city and county in the state during the “12th Five-Year Plan” period. The grid has also gradually entered the era of intelligence.