Multi-STATCOM damping controller design method

Abstract

The invention relates to a multi-STATCOM (Static Synchronous Compensator) damping controller design method. The method comprises the following steps: (1), setting a power system which has N STATCOMs under the same oscillation mode, and sequentially setting the parameters of lead-lag links of the N STATCOM damping controllers; (2), taking each STATCOM critical gain matrix as a basic value to unify operation gain matrices so as to obtain a gain coefficient matrix; (3), calculating a gain matrix sequence of an operation gain micro-increment test; (4), obtaining a gain matrix sequence extreme value and an operation gain through a synchronous gain micro-increment test for the N STATCOM damping controllers; (5), determining the operation gain of the N STATCOMs based on gain constraint conditions; and (6), verifying the damping effect, regulating the gain, and finally determining a coordination operation gain of the N STATCOM damping controllers. Due to the adoption of the method, the potential hazards in the safety and stability of a system are eliminated so as to realize the coordinated and stable operation of the multi-STATCOM damping controllers and fully play the better damping control performance of the multiple STATCOMs, therefore, the system is improved in safety and stability.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a design method for multiple STATCOM damping controllers. Background technique [0002] The emergence of Flexible AC Transmission System (FACTS) provides a very effective means for the safe, economical, reliable and high-quality operation of modern power systems. STATCOM is one of the important members of the flexible AC transmission system, and it plays an important role in increasing the transmission capacity, enhancing the system damping, and improving the power quality of the large-area interconnection system. In recent years, more and more studies have shown that the possible interaction between multiple STATCOM controllers will have a significant impact on the operation and control of the power system. In severe cases, the control performance of the STATCOM device may deteriorate, and even cause system Unsteady. However, under normal circumstances, when people design STATCOM ...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a design method of multiple STATCOM damping controllers, which solves the problem of negative interaction effects caused by simultaneous operation of multiple STATCOM damping controllers, eliminates hidden dangers of system security and stability, and realizes multiple STATCOM The coordinated and stable operation of the damping controller can give full play to the good damping control performance of multiple STATCOMs and improve the safety and stability of the system

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