快速计算电网可用输电能力的交流灵敏度方法

在电力市场环境下，可用输电能力(ATC)是反映输电设备可用于能量交易的剩余容量的重要指标。ATC一旦确定后，快速估计出系统参数变化对输电能力的影响具有很大的实际应用价值。文中首先基于连续潮流方法，考虑输电支路的过负荷约束、发电机有功及无功出力约束和节点电压约束，计算出ATC的值；然后推导出ATC对多种运行参数摄动的一阶灵敏度计算模型，运行参数包括节点负荷功率、发电节点端电压以及给定的能量交易，这些灵敏度系数能够很快地计算；最后，使用了IEEE30节点系统的算例来验证文中所提出的方法的有效性和快速性。

AN AC POWER FLOW BASED SENSITIVITY METHOD FOR THE FAST CALCULATION OF AVAILABLE TRANSFER CAPABILITY

In the context of electricity market, available transfer capability (ATC) is an important indicator of the further usable amount of transmission capacity for commercial trading. It is very meaningful and useful to quickly estimate the effect of any operation parameters perturbation on the ATC value, once a transfer capability value has been given. This paper presents a model for calculating the first order sensitivity of ATC with respect to the variation of any parameters. Combining with continuation power flow (CPF) method, the new ATC can be estimated very fast with first order accuracy. The perturbation parameters include the real injection of bus, regulated voltage of generator bus, and other simultaneous transfer. These sensitivity coefficients can be quickly calculated, and be verified with CPF method. Test results on IEEE 30 bus system shows the efficiency and rapidness of the proposed method.