摘要：【中文】本发明公开了一种直流输电系统的暂态功角稳定性能指标确定方法及系统，属于电力系统稳定分析领域。在暂态功角稳定条件下计算故障时刻到主导模式等值功角第一个极值点时刻内直流输电系统各换流站注入电网能量的增量；在暂态功角失稳条件下计算故障时刻到主导模式动态鞍点或等值功角达到设定值时刻内直流输电系统各换流站注入电网能量的增量。以主导模式对应的振荡中心关联断面分割电网，将与领前群发电机相连通的换流站注入电网能量增量取其相反数，再将换流站注入电网能量增量之和作为直流输电系统的注入电网能量增量，将该增量与直流输电系统注入电网能量增量绝对值中的最大值之比作为直流输电系统的暂态功角稳定性能指标。 【EN】The invention discloses a method and a system for determining transient power angle stability performance indexes of a direct current transmission system, and belongs to the field of stability analysis of power systems. Calculating the increment of the energy injected into the power grid by each converter station of the direct current transmission system from the fault moment to the first extreme point moment of the equivalent power angle of the leading mode under the condition of stable transient power angle; and calculating the increment of the energy injected into the power grid by each converter station of the direct current transmission system from the fault moment to the moment when the dynamic saddle point of the leading mode or the equivalent power angle reaches the set value under the transient power angle instability condition. And dividing the power grid by using the oscillation center associated section corresponding to the leading mode, measuring the opposite number of the energy increment injected into the power grid by the converter station communicated with the generator in the leading group, taking the sum of the energy increments injected into the power grid by the converter station as the energy increment injected into the power grid by the direct-current power transmission system, and taking the ratio of the increment to the maximum value in the absolute value of the energy increment injected into the power grid by the direct-current power transmission system as the transient power angle stability performance index of the direct-current power transmission system.

摘要：【中文】本发明公开了一种电力电子接入电力系统调频能力在线评价方法及系统，基于电力系统当前运行方式系统调频能力特征量采用系统单机等值模型参数预测模型获得当前运行方式系统单机等值模型预测参数，通过预测参数预测得到频率安全预想故障下系统最高或最低频率、最高或最低频率时刻和稳态频率，通过预测得到的系统最高或最低频率、最高或最低频率时刻和稳态频率进行电力电子接入电网系统调频能力在线评价，得到系统调频能力在线评价结果；不需要每次进行仿真计算，速度快，定期更新模型，准确率高。 【EN】The invention discloses a method and a system for online evaluation of frequency modulation capability of a power electronic access power system.A system single-machine equivalent model parameter prediction model is adopted to obtain a system single-machine equivalent model prediction parameter of a current operation mode based on the frequency modulation capability characteristic quantity of the current operation mode system of the power system, the highest or lowest frequency moment and the steady-state frequency of the system under a frequency safety expected fault are obtained through prediction of the prediction parameter, online evaluation of the frequency modulation capability of the power electronic access power grid system is carried out through the predicted highest or lowest frequency, the highest or lowest frequency moment and the steady-state frequency of the system, and an online evaluation result of the frequency modulation capability of the system is; the method does not need to carry out simulation calculation every time, is high in speed, and has high accuracy because the model is updated regularly.

摘要：【中文】本发明公开了一种暂态稳定预防控制辅助决策方法、装置及电子设备，应用于电力系统暂态稳定预防控制决策中，该方法在当前运行方式预想故障暂态稳定评估计算基础上，计算暂态失稳故障的控制措施控制性能指标并筛选有效控制措施，之后按照控制措施性能指标排序结果形成满足控制精度要求的多个控制措施方案，对不同暂态失稳故障的控制措施方案进行枚举组合，采用故障暂态稳定分类预测模型对组合方案进行暂态稳定预测，选择满足暂态稳定要求且控制代价最小的方案作为预防控制辅助决策控制措施建议。本发明实现电力系统暂态稳定预防控制在线智能辅助决策，可以满足计算速度和准确性的要求。 【EN】The invention discloses a transient stability prevention control aid decision-making method, a transient stability prevention control aid decision-making device and electronic equipment, which are applied to transient stability prevention control decisions of a power system. The method realizes the online intelligent auxiliary decision of the transient stability prevention control of the power system, and can meet the requirements of calculation speed and accuracy.

摘要：【中文】本发明公开了一种输电断面热稳定功率极限区间识别方法及系统。求解故障下输电断面功率最小为目标的优化模型，基于所有优化结果求解热稳定功率极限区间下限；构建以故障前/后节点注入有功功率差值最小为目标的子优化模型，构建以基态输电断面功率最大为目标、考虑奔德斯割约束的主优化模型，迭代求解主、子优化模型确定热稳定功率极限区间上限；将传统的热稳定功率极限计算问题，转变为基于奔德斯分解的非线性优化问题，识别出的极限区间更准确，对调度人员充分掌握电网安全稳定边界、保障电网安全稳定运行、充分利用输电断面功率传输能力具有指导意义。 【EN】The invention discloses a method and a system for identifying a limit interval of thermal stability power of a power transmission section. Solving an optimization model with the minimum power of the transmission section under the fault as a target, and solving a lower limit of a thermal stability power limit interval based on all optimization results; constructing a sub-optimization model taking minimum active power difference injected by a node before/after a fault as a target, constructing a main optimization model taking maximum ground state transmission section power as the target and considering the Benders cut constraint, and iteratively solving the main and sub-optimization models to determine the upper limit of a thermal stability power limit interval; the traditional thermal stability power limit calculation problem is converted into a nonlinear optimization problem based on Benders decomposition, the identified limit interval is more accurate, and the method has guiding significance for dispatching personnel to fully master the safety and stability boundary of the power grid, guarantee the safety and stability operation of the power grid and fully utilize the power transmission capability of the power transmission section.