HCM3000 is a control protection platform for UHVDC transmission. It uses a measured extinction angle algorithm for avoiding commutation failure. The theory is that adding ignition angle when detects the commutation failure for avoiding the following commutation failure, so it just can avoid continuous commutation failure, but cannot decrease the probability of commutation failure. Therefore, the HCM3000 adopts the predictive extinction angle control algorithm which can trigger ignition angle before commutation failure for avoiding commutation failure. In the HCM3000, there are two main constraints during the implementation, one is the rapidity and real-time performance of sampling and the computation, the other is the adaptation between predictive algorithm and HCM3000 ignition system. To meet the above two constraints, the whole algorithm is realized in FPGA and the ignition time is converted to ignition angle, respectively. After introducing the algorithm into HCM3000, this paper simulates typical faults which can lead to commutation failure, such as single-phase and three-phase AC fault, pulse loss through RTDS simulation platform. Test results show that HCM3000 significantly reduce the probability of commutation failure after adopting the algorithm.