基于风电出力耦合相关性及动态稳定性的电力系统无功补偿配置研究

项目名称： 基于风电出力耦合相关性及动态稳定性的电力系统无功补偿配置研究

项目编号： No.51507031

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 王玉荣

作者单位： 东南大学

项目金额： 20万元

中文摘要： 我国风力发电呈现大规模多点集群接入、远距离输送的特点，风源相近的风电场间存在风电出力耦合相关性特征。但风电联合出力典型场景、暂态过程电压稳定性约束及风电场低电压穿越约束刻画的不完善，使得无功补偿设备存在配置不充分问题。本项目重点研究考虑风电出力耦合相关性及动态稳定性的电力系统无功补偿配置问题。基于混合Copula理论研究风电场联合出力概率分布，并采用不等概率区间划分法提取风电联合出力典型场景。对考虑风电联合出力典型场景的稳态运行系统进行多目标无功补偿配置研究，并提出风电场内无功补偿设备选型配比指标。通过提出系统暂态过程稳定性约束及风电场低电压穿越约束数学表达，研究具有动态响应特性的无功补偿设备增配方案。通过递进式的配置方式，实现适应电网稳态运行条件下风电联合出力波动影响，并满足系统动态稳定性约束的无功补偿配置。本项目研究成果将为含多风电场电力系统无功补偿配置问题提供理论依据和技术支持。

中文关键词： 无功补偿配置；混合Copula函数；风电联合出力典型场景；动态稳定性；低电压穿越

英文摘要： The wind power generation in our country presents the characteristics of large-scale multi-integration and long-distance transmission. Wind farms in the regional power grid with similar wind source usually perform the coupling correlation of wind power outputs. However, the uncertainty of joint wind power output in wind farms, the deficient description of the transient process voltage stability constraint and low voltage ride through (LVRT) constraint lead to the insufficient allocation of reactive power compensation. This project will focus on allocation of reactive power compensation considering the coupling correlationship of wind power output and the dynamic stability operation of power system. Based on the mixed Copula theory, the possibility density function of joint wind power generation will be investigated, and the typical joint wind power output scenarios are obtained by fuzzy cluster method. Multi-objective reactive power allocation optimization will be carried out for the steady-state system with typical joint wind power output scenarios, and the type selection and capacitor ratio index of different reactive power devices will be proposed for wind power plants. On this basis, the mathematical expression of the power system transient process stability constraints and wind power LVRT constraint will be investigated, and allocation of the enhanced reactive power with dynamic response characteristics will be studied. As a result, the step-up allocation strategy of reactive power devices can be realized with the satisfaction of voltage fluctuation constraint caused by joint wind power output fluctuation and corresponding dynamic stability constraints. The research results of this project will provide theoretical basis and technical support for the reactive power allocation of power system with multiple-integration of large-scale wind farms.

英文关键词： Reactive Power Compensation Allocation;Mixed Copula Function;Typical Scenario of Joint Wind Power Outputs;Dynamic Stability;Low Voltage Ride Through(LVRT)