摘要
针对特高压电网电压无功控制现状及问题,提出了改进的经济压差无功控制策略,通过实时协调控制低压侧常规无功补偿与500 kV电网动态无功补偿,可实现特高压电网无功电力实时平衡,实际电网数字仿真证明了该策略的有效性和可行性。该策略的实施,可大幅降低常规无功补偿设备的投切操作频率,降低设备损坏率;可进一步降低变压器无功损耗,提升运行经济效益;同时对联络线功率波动引起的母线电压波动也有较好的抑制效果,可实现更好的电压质量。
According to present situation of voltage and reactive power control of UHVAC power grid,an improved economic voltage difference-based reactive power and voltage control strategy is proposed.Through real-time coordinative control of conventional reactive power compensator at low voltage side and dynamic reactive power compensation in 500kV power network,real-time balance of reactive power and voltage in UHVAC power grid can be implemented,and the feasibility and effectiveness of the proposed control strategy are verified by simulation results of actual power grid.Implementation of the proposed control strategy can evidently decrease the switching operation times and reduce failure rate of power equipments;the reactive power loss of power transformers can be further reduced and economic benefit of UHVAC power grid operation can be improved;besides,the bus voltage fluctuation caused by power fluctuation of tie lines can be well suppressed,thus a better voltage quality can be attained.
出处
《电网技术》
EI
CSCD
北大核心
2013年第3期673-678,共6页
Power System Technology
关键词
特高压
无功电压控制
经济压差
UHV
voltage and reactive power control
economic voltage difference
