考虑恢复时间模型的电力系统黑启动策略

Power system black-start strategy considering recovery time model

具有快速甩负荷(Fast Cut Back,FCB)能力的机组可以作为系统非常规黑启动电源,有助于电网在尽可能短的时间内恢复正常,具有巨大的社会和经济效益。将常规火电机组的启动分为冷态、温态、热态、极热态和极极热态五种启动方式。机组启动时间模型和恢复路径时间模型一起构成系统恢复时间模型。恢复路径时间模型中技术校验项的考虑,使得系统恢复过程中不满足技术条件的恢复路径在计算中得以剔除。在给定的系统恢复时间内以机组向系统输送的总电能为优化目标,提出考虑恢复时间模型的系统黑启动策略。savnw23节点系统和IEEE300节点系统算例验证了考虑恢复时间模型系统黑启动策略的准确性。大系统中考虑多启动电源的算例结果进一步表明FCB机组有利于加快大系统的恢复进程。

The use of thermal power unit with fast cut back（ FCB） capacity as non-conventional black-start power is conducive to the restoration of power grid in short period and has tremendous social and economic benefits. The start of conventional thermal power unit is divided into cold,warm,hot,very hot and extreme hot five different starting modes. Unit start-up time model and restoration path time model constitute the system recovery time model.The consideration of technical check item in restoration path time model makes restoration paths that do not satisfy the technical conditions be excluded by calculation during the system recovery. A power system black-start strategy considering recovery time model is proposed with the target of maximizing the total output electric energy of units in given system recovery time. Numerical examples on the savnw 23-bus and IEEE 300-bus systems are used to demonstrate the accuracy of the strategy. Results of numerical example of large power system with multi-start powers further show that power unit with FCB capacity is conducive to speeding up the recovery of large power system.