Research on Primary Frequency Modulation Online Monitoring and Assessment Management System Under “Master–Sub” Control Station Model

Abstract

In a modern power system, to realize the safe operation of units and maintain the frequency stability of the power network, various means of frequency modulation can be adopted. However, there are some deficiencies in the real-time monitoring and assessment management of primary frequency modulation (PFM). To solve these problems, a PFM online monitoring and management method based on the “master–sub” control station model in a wide area measurement system (WAMS) is proposed as a control strategy to support frequency modulation of units and assist power network assessment. In the hybrid monitoring system strategy of the master control station and sub control station, the sub control station is built locally in the power plant to monitor the operational status of the unit in real-time and calculate the PFM assessment index. The master control station is built in the dispatching center, receiving the assessment data uploaded by the sub control station and sending the PFM simulation test instruction. This strategy can effectively improve the real-time performance of dynamic monitoring and parameter calculation, and reduce the probability of frame loss and communication instability in long-distance data transmission. The experimental results show that the PFM online monitoring management control strategy based on the “master–sub” control station model can effectively monitor the unit and provide data support for PFM assessment.

Quantitative Frequency Security Assessment of Modern Power System Considering All the Three Indicators in Primary Frequency Response

“…In addition, the frequency security assessment is affected by the randomness of the output of renewable generations such as wind turbines, which puts forward higher requirements for real-time performance [31]. References [32,33] find that online monitoring and management methods can effectively provide data support for frequency security assessments based on a simplified frequency response model.…”

Study on Quantitative Evaluation Index of Power System Frequency Response Capability

“…The key parameters include the dead band of frequency modulation, the speed inequality, retardation rate, the maximum amplitude limitation of load adjustment, the time requirements of response behavior, and so on, which can affect the primary frequency regulation performance, the most important parameters are frequency modulation dead band and speed inequality [32].…”