Abstract: The control system as offshore oil platform connecting the core of the control aspects of the production.And PID controller as an important part of the control loop control system, often due to changes in working conditions and other causes varying parameters mutation occurs in the system and cause its performance may be degraded. In this paper, reliability of PID controller performance evaluation method based on minimum variance control for the PID controller. Construction of Offshore oil and gas separation system simulation test model with semi-physical simulation technology, and use this model to simulate offshore oil and gas separation process simulation study of the control system. Multi-bus technology to ensure communication with the computer simulation model, simulation system platform to achieve real-time monitoring parameters. Finally, the test results show that the model simulation of real-time evaluation PID algorithm can effectively improve the performance of the control system.

Key words: Performance evaluation, oil and gas separation, minimum variance, PID

摘要： 海上石油平台石油生产油气分离控制回路的控制器大都为PID控制器。而PID控制器可能会因工况变化及参数突变等原因导致系统发生时变而造成其性能下降。针对PID控制器性能可靠性提出基于最小方差控制的PID控制器性能评价方法，利用半实物仿真技术构建海上平台油气分离系统仿真测试模型，并以该模型对中控系统进行仿真研究。采用多总线技术保证仿真模型与计算机通信，实现对仿真系统平台参数的实时监控。最后，通过对测试模型仿真的结果表明PID实时评估算法可以有效提高中控系统的性能。

关键词: 性能评价, 油气分离, 最小方差法, PID