The hottest State Grid Beijing power grid automati

2022-09-22
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Guodian Beijing power automatic voltage control system has been put into full operation for the monitoring and management of the whole production line. Recently, the reactive power and voltage equipment of Beijing Qingyundian 220kV substation was officially connected to the automatic voltage control system. So far, the 27 220kV substations connected to the control center of Beijing electric power have all achieved automatic voltage regulation

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voltage quality is one of the important indicators of power quality. Reactive power compensation and reactive power balance in power system are the basic conditions to ensure voltage quality, and play an important role in ensuring the safety, stability and economic operation of power system. The traditional voltage control is formed by the research and innovation of decentralized local controller groups, which needs to be driven manually, so it is impossible to coordinate and optimize the voltage from a global perspective. As the capital, Beijing's political, economic and military departments, enterprises and institutions have high requirements for power quality, voltage stability and reliability of all kinds of high-precision instruments and equipment. Since October 2008, Beijing company affiliated to State Grid Corporation of China has organized production, dispatching, automation, protection and other disciplines to jointly develop Beijing power automatic voltage control system (AVC). Combined with the dispatching energy management information system, the system uses the real-time operation data of electricity to calculate the best voltage regulation scheme from the perspective of the whole electrical system. With the constraints of voltage safety and high quality, and the goal of system operation economy, the system jointly controls the voltage regulation equipment of the substation, and realizes the automatic control of electric reactive power and voltage optimization

the system has been running smoothly since it was put into operation, and various functional modules and control strategies have been successfully realized. The number of buses whose voltage exceeds the limit in peak and trough periods of electric load has decreased by 68% and 63% respectively compared with that before the system is put into operation, and the cumulative time of bus voltage exceeding the limit has decreased by 25.23%. In particular, it has effectively alleviated the problem of continuous high voltage in northwest Beijing due to the substantial increase of cable lines in recent years, and the power quality of Beijing has been significantly improved

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