Overview The old factory of Acer Electric Heating Co., Ltd. was founded in May 1967. On August 26, 1970, the first phase of the power plant was put into operation and connected to the grid. Acer Electric Heating Co., Ltd. currently has 8 boilers with a total capacity of 2,220 tons/hour, 8 generators, a total capacity of 452 MW, 3 turbine blowers, a total capacity of 12,581 cubic meters per minute, and TRT residual pressure power generation. It has 2 sets of machines with a total capacity of 10.5 MW. It is the main energy power center of Jiugang (Group) Co., Ltd. and the largest main power plant of Jiajiu Power Grid.
The electrical equipment of the old factory of Acer Electric Heating Co., Ltd. is the equipment put into production in the 1970s and 1990s. In recent years, all kinds of switches have been modified with different degrees of electrical equipment, but the high-voltage equipment cabinet still uses the old ones. High-voltage cabinets, all the electrical switchgear of the old factory do not have the five-proof "blocking function" of the electric anti-misoperation device, which does not meet the safety requirements of the power grid connection.
With the continuous advancement of science and technology and the increasing requirements for the reliability of power supply equipment, the operational safety requirements of power systems for power equipment have been further improved. At present, power systems have clearly stated that power plant electrical equipment cabinets must have The five-defense "function can be allowed to be integrated into the power grid. The power system grid-connected safety evaluation and the twenty-five anti-accident measures also clearly stipulate that the electrical equipment does not have five defenses" devices are strictly prohibited from being connected to the power system.
In the power system, the misoperation caused by the failure of the five-proof function of the electrical equipment is the biggest disaster in the power industry. It directly affects the safe operation of the power grid and the normal power supply produced by the Jiugang Company. In severe cases, it even causes equipment damage. , expand accidents, and cause personal injury or death.
Doing a good job of preventing major accidents in power production is an important condition for ensuring the safe and stable economic operation of the power system. It is the common task of all units such as manufacturing, design, installation, commissioning and production. Therefore, it is imperative to transform and improve the electrical equipment of thermal power plants to prevent misoperation of equipment.
The five-proof "locking device" is one of the important electrical equipment essential to the power plant. It is an important technical safeguard measure to effectively prevent electrical personnel from entering the interval and misoperation. It is to ensure the safe production and safety of the power system. One of the important means of operation. The anti-misoperation device should be able to realize the following five-proof functions: prevent mis-distribution, mismatch the circuit breaker; prevent the load from pulling and closing the switch; prevent the live connection (closed) grounding wire (knife gate); Prevent the grounding wire (knife gate) from closing the circuit breaker (isolation switch); for this reason, it is necessary to transform and improve the five-proof function of the microcomputer to prevent misoperation of the old factory electrical equipment as soon as possible to ensure the safety of the power system and the company-wide power supply. The reliability and economic operation of sex and power plant production create better economic benefits for the wine company.
Renovation plan old factory various high-voltage switchgear five anti-"device transformation and improvement requires a lot of special construction equipment and materials, spare parts, the electrical maintenance personnel of Acer Electric Co., Ltd. does not have construction qualification. In order to ensure the quality and progress of the construction On the basis of fully considering the shortage of funds for equipment renovation of Jiugang Company, it is planned to entrust professional manufacturers or professional construction units to the site for construction in the next year.
According to the actual situation of the operation of the high-voltage equipment of the old factory and the various problems existing in the Northwest Power Grid, through the meticulous communication and technical exchanges between the relevant technical personnel of the power plant and the equipment manufacturers of the five defenses, it was finally determined that the high-voltage switchgear of the old factory has five defenses. The equipment improvement and transformation plan is scheduled to be carried out in the next year during the inspection of electrical equipment and improve the 'five-proof' function, so as not to affect the safety, stability and reliability of the entire Northwest Power System and Jiugang Company.
This transformation consists of five anti-locking device manufacturers equipped with sufficient safety work tools and safety protective equipment that have passed the inspection of national or provincial and ministerial quality inspection institutions; in order to prevent accidental access to outdoor electrified equipment, it is fully enclosed (including mesh) The temporary fence of the maintenance; the outgoing side of the switchgear should be equipped with a live display device, the live display device should have a self-test function, and interlock with the line-side grounding knife; the power supply for the anti-misoperation device should be connected with the relay protection and control loop power supply. Independent; when using computer monitoring system, remote and local operation should have the function of preventing misoperation and blocking; when using computer to prevent mis-locking, it must be reviewed by the relevant department of the unit, and can be put into operation after being approved by the competent leader and filed.
4 The main construction content is harmonic, the busbar switch and the knife gate are equipped with five anti-locking devices.
Attached to the five anti-locking device.
4 The main transformer 10KV switch and the knife gate are equipped with five anti-locking devices.
In the 1-2 factory high-voltage working transformer high and low side switches, the knife gate is equipped with five anti-locking devices.
Install five anti-locking devices on the high and low side switches and knife gates of the high voltage standby transformer of 1-2 factory.
The knife gate and the grid connection switch and the knife gate are equipped with five anti-locking devices.
The power switch and the knife gate are equipped with five anti-locking devices.
Closed, the knife gate is equipped with five anti-locking devices.
5 The initial estimate of investment costs is responsible for installation and commissioning, and the relevant personnel of the power plant cooperate vigorously. Based on the full inquiry and the serious comparison of the same type of equipment on the inside of the enterprise: the cost of ordering equipment: 800,000 yuan installation and commissioning costs: 100,000 yuan Other expenses: 100,000 yuan Total: 1 million yuan 6 Conclusion Acer The electric high-voltage electrical equipment of the old factory of the electric heating limited liability company renovates and perfects the five-proof "locking function, which can effectively prevent the accidental operation caused by the operator's mistakenly entering the charging interval and mis-pull, mismatching the knife gate, etc., thus completely eliminating the electrical The occurrence of equipment misoperation accidents and the resulting personal injury and death accidents ensure the safe, economical and stable operation of the power plant and the safe production of the company and the safe, stable and reliable operation of the entire Northwest Power Grid.
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