The development and application of a new combined-distributed HVDC tester

In view of the present lack of debugging method for HVDC protection system, this paper proposes the method to a single device function test and the method to a distributed system test for HVDC protection system, and designs a new combined-distributed HVDC tester to realize the above two test methods. The HVDC tester includes management module, power amplifier module, I/O module and optical fiber Ethernet Module, fiber FT3 module, power supply module, and so on. Various modules include internal bus interface, general power supply interface, external fiber interface, and through the internal bus interface and general power supply interface, all modules are combined in a chassis to form a combined tester. Through the external fiber interface and general power supply interface, these modules can also form a distributed test system. The combined tester is convenient to carry, store and manage, mainly for the function and performance test of a single HVDC protection device, while the distributed tester is mainly used to fulfill the distributed system test on site. This flexible combination method not only reduces the cost and volume of tester, but also provides affluent interfaces and flexible application. Engineering practices show that the device fully meets the requirements of HVDC protection maintenance and operation on site.