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提出了一种基于支路耗散功率分量的无功定价新方法。将具有无功调节能力的设备视为无功源,将对无功源有依赖作用的负荷(包括有功负荷和无功负荷)和发电机(有功出力)视为用户(或消费者)。基于电网的稳态潮流解或状态估计解,将各无功源输出的感/容性无功功率用等值并联电纳(简称“费用电纳”)替代,将各用户的功率用等值节点注入电流替代,然后运用支路耗散功率分量理论求各用户在费用电纳上产生的耗散无功分量及其对应的无功费用。总加所有费用电纳上某用户有功功率(无功功率)对应的无功费用,并求单位无功费用,即得该用户消费单位有功功率(无功功率)的无功电价。这种方法不仅适用于任意结构和有环流的电网,而且在计及有功功率和无功功率耦合影响的同时还确保收支平衡。数字仿真结果验证了所述方法的有效性。
A new reactive power pricing method based on dissipated power components of the branch is proposed. The equipment with reactive power adjustment capability is regarded as a reactive power source, and the load (including active load and reactive power load) and generator (active power output) that depend on the reactive power source are regarded as users (or consumers). Based on the steady-state power flow solution or state estimation solution of the power grid, the sense/capacitive reactive power output from each reactive power source is replaced by equivalent-value parallel-connected susceptance (abbreviated as “cost-based susceptance”), and the power of each user is used. Equivalent nodes inject current instead, and then use the branch dissipation power component theory to find the dissipative reactive components generated by each user on cost susceptance and their corresponding reactive power costs. Total cost of reactive power corresponding to a user’s active power (reactive power) on all charges of the susceptance, and the unit’s reactive power cost, ie, the reactive power price of the active power (reactive power) of the user’s consumption unit. This method is applicable not only to arbitrary structures and circulating current grids, but also to ensure balanced expenditures while taking into account the coupling effects of active power and reactive power. Digital simulation results verify the effectiveness of the method.