Design Methods for Power Secondary System Simulation in New Power Systems

doi:10.16183/j.cnki.jsjtu.2023.541

Abstract

Abstract:

Under the new situation, there is an urgent need to model and simulate the power secondary system which highly shares information and implements real-time decision-making, in line with the modeling and simulation requirements of new power systems. In this paper, design methods are proposed for the first time to achieve simulation of power secondary systems by correlating the operating status of the power primary system. The smart substation secondary system with complex functional descriptions is taken as the research object. First, an interrelated simulation method for power primary and secondary systems is proposed, and its simulation implementation framework, data interaction method, and data synchronization management are explained, which enables the actual electrical quantity data of the primary system to be transmitted to the secondary side, solving the problem of data source in the secondary system simulation. Then, a simulation design method for the power secondary system is proposed, incorporating system-level interaction design, component-level class design, and module-level state design based on the object-oriented unified modeling language (UML). Thus, the entire process of transmission, interaction, processing, and conversion of electrical quantity data in the secondary system can be analyzed. Finally, to validate the effectiveness of the proposed method, a case study is conducted using a short-circuit fault scenario at the 110 kV side outlet of the 220/110/10 kV main transformer bay, in conjunction with a differential protection scheme.

Key words: new power system, cyber-physical power system(CPPS), power secondary system, data synchronization (DS) management, unified modeling language (UML)

CLC Number:

TM743

HE Ruiwen, LU Jialiang, YANG Changxin, PENG Hao, MOHAMMAD Shahidehpour. Design Methods for Power Secondary System Simulation in New Power Systems[J]. Journal of Shanghai Jiao Tong University, 2025, 59(10): 1419-1430.

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交互动作	基本内容
1	接收FT3报文、提取模拟量信息
2	接收GOOSE报文、提取开关量信息
3	周期性发送SV报文
4	周期性发送心跳GOOSE报文
5	发生故障时变周期发送变位GOOSE报文

状态名	描述	进入动作	内部活动	出口动作
初始状态	运行前的最初状态
初始化状态	进行属性的读取与变量的解析初始化	GetAllAttributes	ArrangeSelflnterruption.
空闲状态	等待报文的到达或仿真结束
报文接收状态	对报文进行类型判别,决定跳转状态	GetPacket	PacketTypeJudment	StatusJump
GOOSE 报文处理状态	对 GOOSE 报文进行处理	GetPacket	GooseProcessing InformGooseSend. WriteStatistics	DestroyPacket
FT3 报文处理状态	对 FT3 报文进行处理	GetPacket	GooseProcessing InformSvSend. WriteStatistics	DestroyPacket
其他报文处理状态	对非法报文进行销毁	GetPacket	WriteStatistics	+DestroyPacket

发送端设备	接收端设备	总时延/ms
主变220 kV电子式互感器	220 kV侧合并单元	0.145
主变110 kV电子式互感器	110 kV侧合智一体化设备	0.145
主变10 kV电子式互感器	10 kV侧合智一体化设备	0.145
220 kV侧合并单元	保护单元	0.426
110 kV侧合智一体化设备	保护单元	0.394
10 kV侧合智一体化设备	保护单元	0.384
保护单元	220 kV侧智能终端	0.434
保护单元	110 kV侧合智一体化设备	0.419
保护单元	10 kV侧合智一体化设备	0.412
220 kV侧智能终端	保护单元	0.434
110 kV侧合智一体化设备	保护单元	0.434
10 kV侧合智一体化设备	保护单元	0.410