0 Introduction

In recent years, China's independently controllable chips have developed rapidly under the support of national policies and government, initiating a wave of domestic substitution in fields such as electric power, military, machinery, communications, electronics, and medical care. However, there are still significant shortcomings in chip independent controllability and domestic substitution. In 2022, China's integrated circuit imports reached 538.4 billion units, with an import value exceeding 400 billion US dollars, while exports in the same year were 153.9 billion US dollars, making integrated circuits the commodity with the largest trade deficit in China [1]. According to data from the National Bureau of Statistics, most of China's high-end chips are imported from European and American countries, which is a significant gap compared to the government's initiative for independently controllable chips. For IED equipment and test devices in the power industry, their chips heavily rely on foreign imports, posing certain uncontrollability. A supply cut-off would severely impact the production and supply of existing products [2].

To address the impact of uncontrollability, long order cycles, and security risks of foreign imported chips on national power safety, and in active response to the call from State Grid Corporation of China and China Southern Power Grid Company to promote the domestic application of secondary equipment [3], there is an urgent need to replace foreign chips in substation secondary equipment with domestic ones. Addressing the development requirements and current status of new-generation independently controllable relay protection device test equipment, reference [4] designed and developed a handheld relay protection tester using the domestic Allwinner T3 chip as the core, supplemented by a domestic FPGA from Unigroup Guoxin; reference [5] discussed key technologies for system-level testing of relay protection and proposed testing methods for operational performance, functional interaction, configuration management, and virtual circuit reliability under complex working conditions; reference [6] applied the CMS protocol to relay protection device test equipment and developed wire-changing and I/O modules based on PLC, effectively solving the problem of automatic wire-changing not being achievable in analog sampling automatic testing for protection devices; reference [7] addressed the difficulties in operation and single functionality of traditional series compensation protection testing methods by designing and developing a fully functional relay protection test platform for series compensation devices, achieving automated on-site verification of series compensation protection performance; reference [8] designed a remote intelligent testing method for smart substation relay protection based on independently controllable technology, achieving verification functions for sampling correctness and secondary circuit integrity. The aforementioned research results struggle to meet multi-item testing requirements for domestic communication protocols, protection functions, network performance, and operational characteristics, and have not verified the reliability of replacing MMS with the domestic CMS communication protocol.

To address these issues, starting from the research direction of chip autonomy and domestic communication protocols, this paper selects domestic FPGAs, Loongson processors, and SylixOS operating system, and uses the domestic CMS communication protocol to replace MMS. This aims to develop equipment suitable for protection function testing and network performance testing of new-generation independently controllable relay protection devices, effectively avoiding potential risks of domestic chips in communication protocols, functional logic, and other aspects.

1 Independent Controllability of Key Devices and Operating Systems

1.1