输配电网一体化分布式电压稳定评估与控制方法研究

In traditional power system voltage stability assessment and control, the transmission power grid was paid much attention while the distribution power grid was paid less attentions. The transmission power grid voltage stability assessment and control had been isolated with that of the distribution power grid. While a large amount of distributed generators were integrated into the distribution power grid, its voltage-reactive power control characterics has been changed and its voltage stability assessment and control has become more and more important. At the same time, the transmission power grid voltage stability assessment and control had not been suitable to be solved independently. The control mode of modern smart power grid is distribution of autonomy and centralized coordination. Based on this principle, we are going to study on the transmission-distribution power grid distributed voltage stability assessment and control methods. It includes: (1) studying the reactive power-voltage characteristics of different types of distributed generators to build the models for voltage stability assessment; (2) studying 3 phases unbalanced continuation power flow model and method to realize the load margin computation, voltage stability critical point identification and sensitivity analysis of distribution power grid with DG; (3)studying transmission-distribution distributed voltage stability assessment method, to realize the weak area identification and contingency selection and ranking by exchanging the voltage magnitude, power and associated information; (4)studying sensitivity and successive linear programming based control model and method to realize the multiple contingency voltage stability coordinative preventive control of the transmission-distribution power grid. We hope that the research and application of the voltage stability assessment and control technologies of large power grid can be improved with this project’s execution.

传统电力系统电压稳定评估与控制重输网、轻配网，且输网与配网割裂开来分别进行。随着大量分布式电源(DG)接入配网，改变了配网无功电压控制模式，其电压稳定监视与控制日益重要，且输配电网电压稳定评估与控制已经不再适宜孤立进行。基于分布自治、集中协调的智能输配电网调控模式，本项目拟开展输配电网分布式电压稳定评估与控制方法研究。包括：一，研究不同类型DG的无功电压调节特性，为电压稳定计算构建精细化模型；二，研究含DG配电网连续潮流模型与方法，实现三相不平衡配网负荷裕度计算、稳定临界点辨识和灵敏度分析；三，研究输配电网主从分布式电压稳定评估方法，通过边界母线重叠建模、电压、功率及辅助信息的交换，实现输配电网一体化负荷裕度计算和预想故障快速筛选；四，研究基于灵敏度构建逐次线性规划优化控制模型，实现输配电网多故障分布式电压稳定协调预防控制。通过本项目的开展，推动输配电网电压稳定评估与控制技术的研究与应用。

传统电力系统电压稳定评估与控制重输网、轻配网，且输网与配网割裂开来分别进行。随着大量分布式电源(DG)接入配网，改变了配网无功电压控制模式，其电压稳定监视与控制日益重要，且输配电网电压稳定评估与控制已经不再适宜孤立进行。基于我国分布自治、集中协调的输配电网调度控制管理模式，本项目研究了输配电网分布式电压稳定评估与控制模型与方法。研究了不同类型DG的无功电压调节特性，为电压稳定计算构建精细化模型；提出了一种含DG配电网连续潮流模型与方法，实现了三相不平衡配网负荷裕度计算、稳定临界点辨识；提出了一种输配电网主从分布式电压稳定评估方法，通过边界母线重叠建模、电压、功率及辅助信息的交换，实现输配电网一体化负荷裕度计算和预想故障快速筛选；提出了输配电网一体化电压稳定预防控制模型与分布式计算方法，可实现输配电网多故障分布式电压稳定协调预防控制。通过本项目的开展，有力地推动了输配电网电压稳定评估与控制技术的研究与应用。