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特高压接入给其近区电网的无功电压运行和控制带来挑战。结合工程实践,文中研究了面向特高压近区电网的自动电压控制方法。分析了特高压近区电网的无功电压运行控制特点,针对特高压有功潮流变化对近区电网母线电压影响大,电网电压波动大,多电厂、多变电站紧密耦合等运行特性,提出并实现了考虑特高压线路运行方式变化的敏捷电压优化控制技术,同时兼顾特高压近区电网内紧密耦合的多电厂之间、多变电站之间、电厂与变电站之间的协同,在保证电压安全的基础上,减少不合理的无功功率流动,避免不必要的电容电抗器等离散设备投切。所提出的方法已经在实际现场投入闭环运行,运行效果证明了其有效性和可行性。
UHV access challenges the operation and control of reactive power in its near-area grid. Combined with engineering practice, this paper studies the automatic voltage control method for UHV near-grid. In this paper, the characteristics of reactive power and voltage control in the near-end power system are analyzed. According to the characteristics of UHV active power flow, such as large influence on bus voltage of near-area power grid, large fluctuation of power grid voltage, close coupling between multiple power plants and multi-substations, Taking into account the changes of UHV line operation mode of Agile voltage optimization control, taking into account the close coupling of UHV near-grid power plants, substations, power plants and substations synergies, on the basis of ensuring voltage safety , Reduce unreasonable reactive power flow, avoid unnecessary capacitor chokes and other discrete equipment switching. The proposed method has been put into closed-loop operation at the actual site, and its operation effect proves its effectiveness and feasibility.