同步发电机中不可直接测量量的左逆软测量方法  

Left-inversion Soft-sensing Method for the Directly Immeasurable Variables in the Synchronous Generator

作　　者：张凯锋[1] 戴先中[1] 马超[1] 张嘎[1] 

机构地区：[1]东南大学自动化学院复杂工程系统测量与控制教育部重点实验室,江苏省南京市210096

出　　处：《电力系统自动化》2008年第23期46-50,94,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50507002;60574097)~~

摘　　要：研究了同步发电机中一些不可直接测量量(功角、dq轴暂态电势、dq轴电流分量等)的动态软测量问题。首先,建立了适合于软测量分析的同步发电机模型,该模型充分包含了同步发电机中的一些可直接测量量(如有功功率、无功功率、电流幅值等),且是一类特殊的非线性微分—代数子系统。接着,针对所建立模型的特殊性,给出了适合此模型的推广的左逆软测量算法。然后,具体针对同步发电机的4阶实用模型设计了软仪表,实现了模型中所有不可直接测量量的软测量。最后,基于MATLAB/SimPowerSystems软件进行了数值仿真,用6阶次暂态模型模拟真实的同步发电机,验证了所提出的方法的有效性。The problem of soft sensing of directly immeasurable variables in the synchronous generator, such as the power angle, the d and q axis transient electromotive forces, the d and q axis stator circuit currents, is investigated. Firstly, the model of synchronous generator suitable for soft-sensing is proposed, which includes the directly measurable variables of generator, such as the active and reactive powers, the amplitude of current, etc. The proposed model is a type of nonlinear differential-algebraic sub-systems. Secondly, aiming at the specialty of the proposed model, an expanded left-inversion soft-sensing algorithm is proposed for the soft-sensing of synchronous generator. Then, a left-inversion soft-sensor is designed considering the 4-order transient practical model of synchronous generator, and all directly immeasurable variables in the model can be soft-sensed. Finally, simulations are performed using MATLAB/ SimPowerSystems, in which a 6-order sub-transient practical model of generator is used, and the results demonstrate the validity of the proposed method.

关 键 词：电力系统 软测量 同步发电机 不可直接测量量 实用模型 

分 类 号：TM31[电气工程—电机]