Zhejiang Electric Power 500 kV transmission equipment charged water washing

March 7, learned from Zhejiang Electric Power Company, the company is accelerating 500 kV power transmission equipment charged water washing technology research and application, and strive to pass the project acceptance next year.

The 500-kilovolt power grid is the main grid in Zhejiang and is a bridge connecting regional networks. Its safe and reliable operation is an important condition for ensuring long-term stable operation of the system. The 500 kV power transmission equipment charged water washing, not only can improve the availability of power equipment and operation and maintenance level, but also to promote the status of 500 kV power transmission equipment maintenance level is an important means.

At present, water washing and anti-fouling work of 500-kilovolt power transmission and transformation equipment in Zhejiang Province is carried out under power outage, which not only interrupts system contact but also reduces the reliability and continuity of power supply of the system. To this end, Zhejiang Electric Power Company with mature experience in 220 kV and below charged water flushing, and actively explore and promote 500 kV power transmission equipment charged water flushing work.

On December 29, 2012, Zhejiang Provincial Electric Power Company conducted 500kV substation charged water flushing water column leakage current characteristic test. In the first test, the meter showed that the maximum water column leakage current was 288.6 microamps, both less than 1 milliamp. Test shows that 500 kV power transmission equipment charged water washing is feasible.

According to Zhou Weiqing, chief safety officer of Zhejiang Electric Power Company, the four-gun combination flushing method will be used in the charged flushing. This will not only avoid the dead zone of the equipment but also meet the requirements of flushing, sweeping and extinguishing. At present, Zhejiang companies are substation, transmission two sub-topics, sort out the implementation of key tasks and time nodes, orderly promote 500 kV power transmission equipment charged water washing. By the end of March, all pilot projects of water flushing will be completed. The substation will design and manufacture the prototype of the flushing equipment by the end of March. The on-site water flushing test will be completed in April and the test data will be collected, collated and analyzed. Charged water rinse site standardization operation card; line part will be completed in June, the design and manufacture of transmission water washing small devices, completed in August on-site live water washing test and the completion of the test data collection, collation and analysis, put forward the charged water rinse Site standardized operation card; by the end of 500 kV flushing device to complete the design drawings, preliminary summary of the project results; by the end of 2014 through the project acceptance.