A digital closed-loop test system and method for stability control system

Abstract

The invention discloses a digital closed-loop test system for a stability control system. A RTDS (Real Time Digital Simulation System) comprises N pieces of parallel GTNET boards; a process layer switch is respectively connected with a security and stability control system and the N pieces of parallel GTNET boards through a cable; the GTNET boards transmit SV analog quantity and GOOSE switch quantity signals output by the RTDS to the security and stability control system through the process layer switch, wherein N is greater than 1; and GOOSE trip outlet signals output by the security and stability control system are transmitted to the GTNET boards of the RTDS through the process layer switch. According to the digital closed-loop test system for the stability control system provided by theinvention, the analog quantity and switch quantity acquisition and trip signal outlets of the stability control system are achieved through VLAN setting and a digital interface communication configuration file of a router, so that a complete digital closed-loop test system of the stability control system is formed; and full digitalization of input and output of the stability control test system is realized, and the efficiency and reliability of stability control policy verification can be improved.

Description

technical field [0001] The invention relates to the technical field of power system safety and stability control, in particular to a digital closed-loop test system and method for a stability control system. Background technique [0002] With the improvement of power system safety and stability and power supply reliability requirements, the power system safety and stability control system (hereinafter referred to as "stability control system") has been widely used in various power grids across the country, and has become an indispensable part of the daily operation of the power grid. . The power system safety and stability control system has a large scale, a large number of devices, and complex and changeable control strategies. It must pass the dynamic simulation test of the RTDS (Real Time Digital Simulator) test system to ensure the reliability of the system operation. [0003] The RTDS simulation test of the stability control system judges a system failure by collecting...

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Problems solved by technology

The stability control system needs to collect the analog and switching values ​​of multiple components at the same time, and the I / O output boards of RTDS, especially the analog output GTAO boards, can only output voltage and current at two intervals. A huge stability control system often needs to be equipped with dozens of GTAO boards; at the same time, the output of GTAO boards is an analog small signal, which needs to be passed through a signal amplifier to output voltage and current that match the secondary loop of the safety and stability control system. It is very complicated and the test efficiency is not high; although the safety and stability control systems of some manufacturers support small signals to directly interface with GTAO, they still need to use complex cable connections and matching; GTAO, GTDI, GTDO and other boards need to be connected through external independent The switching power supply increases the complexity of the system design; because it only supports the conventional electrical interface, the current test method cannot test and study the safety and stability control system of a large number of digital substations.

[0004] At present, there have been some studies on closed-loop testing of protection devices using RTDS digital interface GTNET, but only a single GTNET is used to test a single compartment protection device; the test of safety and stability control system is the analog output of GTNET, The switching value is connected to the safety and stability control system after being transferred by the merging unit and the intelligent terminal. The connection and transfer relationship of the system is complicated, which is not conducive to the development of real-time dynamic tests of the large-scale stability control system.

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