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Practical Implementation of Coordinated Q-V Control in a Multi-Machine Power Plant

机译：多机电厂Q-V协调控制的实际实现

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摘要

This paper presents details of the practical implementation of a coordinated reactive power–voltage controller (CQVC) developed for a multi-machine steam power plant. The CQVC performs optimal coordination of the synchronous generators' reactive power outputs in order to maintain the total reactive power delivered by a steam power plant (SPP) or the voltage at a steam power plant HV busbar. This is required to achieve slow preventive control of generated reactive powers in order to maximize reactive power reserves along with slow high side voltage control. The CQVC is designed to act through existing automatic voltage regulator inputs, thus no modification of an existing excitation system was made. In order to increase the robustness to changes in operating conditions and to achieve the desired shape of the reactive power response, the two-step predictor corrector method is implemented. A newly developed algorithm for steady state detection ensures non-interference of reactive power voltage control with excitation system response. The paper also presents practical design solutions to overcome limitations posed by application to a real system. Acceptance and functional tests carried out during the commissioning of the CQVC are also discussed in this paper.
机译：本文介绍了为多机蒸汽发电厂开发的无功协调电压控制器（CQVC）的实际实施细节。 CQVC对同步发电机的无功功率输出进行最佳协调，以维持蒸汽发电厂（SPP）输送的总无功功率或蒸汽发电厂HV母线的电压。这需要对生成的无功功率进行缓慢的预防性控制，以便最大化无功功率储备以及缓慢的高压侧电压控制。 CQVC旨在通过现有的自动电压调节器输入起作用，因此无需对现有的励磁系统进行任何修改。为了提高对运行条件变化的鲁棒性并获得所需的无功功率响应形状，实现了两步预测器校正器方法。新开发的稳态检测算法可确保无功电压控制不受励磁系统响应的干扰。本文还提出了实用的设计解决方案，以克服实际应用中的局限性。本文还讨论了在CQVC调试期间进行的验收和功能测试。

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