大规模交直流电网电磁暂态数模混合仿真平台构建及验证：(一)整体构架及大规模交直流电网仿真验证

随着中国特高压交直流电网快速发展,交直流、多直流之间相互影响加剧,电网安全运行面临严峻挑战,对仿真工具的性能提出了更高的要求。对接入实际直流工程的控制保护装置进行数模混合仿真是当前对大规模交直流系统动态特性进行仿真所采用的较为准确的仿真手段。文中在原有数模混合仿真技术基础上,提出了适用于研究大规模交直流混联电网运行特性的新一代数模混合仿真平台构建方案。该方案以大规模电磁暂态实时仿真软件HYPERSIM和超级并行计算机SGI为数字仿真核心,接入全部在运直流工程的控制保护装置及其他类型电力电子控制保护装置,解决了大规模特高压交直流电网高精度仿真试验研究的难题,并且实现了同时接入8回直流工程控制保护装置、电磁暂态仿真规模超过6 000节点的数模混合实时仿真。通过对实际电网故障的反演和结果对比,验证了所构建仿真平台方案的有效性。

Construction and Validation of Electromagnetic Transient Digital-Analog Hybrid Simulation Platform for Large-scale AC/DC Power Grids Part One General Configuration and Simulation Validation of Large Scale AC/DC Power Grids

With the fast development of ultra-high voltage power grids, and more and more serious interaction effects between AC/DC and DC/DC, the power grid safety faces serious challenges, and the higher-level performance requirements are put forward for power system simulation tool. Till now, the digital-analog hybrid simulation of the control and protection devices in real high voltage direct current(HVDC)projects is the more accurate mean to be adopted for studying the dynamic characteristic of the large-scale AC/DC power grids. Based on the existed digital-analog hybrid simulation technology, a construction scheme for a new generation digital-analog hybrid simulation platform is proposed to study the operation characteristics of large-scale AC/DC power grids. In this scheme, the electromagnetic-transient real-time simulation software HYPERSIM and super parallel computer SGI are used for the digital simulation, and the control and protection devices of all the existed HVDC and other power electronic projects are able to be connected to the digital simulation power grid. Thus, the high-precision simulation problems of large-scale AC/DC power grids are solved, and the real-time simulation of large-scale AC/DC power grids with 8 sets of HVDC projects control and protection devices and more than 6 000 nodes is achieved. By actual faults reproductions and detailed comparisons between the digital-analog hybrid simulation test and the field test, the effectiveness of the proposed construction scheme of simulation platform are verified.