A Parallel Simulation Method for Cascading Faults of Relay Protection and Safety Automatic Devices
A safe, automatic, and relay-protected technology, applied in the field of simulation, can solve problems such as slow calculations, difficulties for users to see calculation results, and a large number of custom models, so as to achieve small communication traffic in interface design, good scalability and adaptability, high efficiency effect
Active Publication Date: 2016-09-21
STATE GRID CORP OF CHINA +2
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[0005] However, the relay protection and safety device models built by user-defined modeling contain a large number of basic function boxes. Taking line distance protection as an example, conventional distance protection requires about 100 basic logics under the custom modeling framework function box
For the entire power system, including main protection, backup protection, and automatic devices, the number of user-defined models is very large, resulting in slow calculations in conventional serial electromechanical transient simulations, and it is difficult for users to see the calculation results for a long time
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[0067] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0068] Key terms used in the present invention are defined as follows:
[0069] There is a close cooperation between a large number of relay protection and safety automatic devices in the cascading fault power system, especially between adjacent devices. This coordination relationship is reflected in the setting value set by each device to reflect the operating state of the power grid. Due to the interrelationship between electrical quantities that reflect the operating state of the power system, when a certain fault occurs, the operating state of the power grid may be equal to or exceed the setting value of some devices, making it meet the conditions for action, and then causing other faults to occur. This process is called cascading failure.
[0070] Relay protection is a device in which one or more protection elements (such as relays) and logic elements ...
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The invention provides a parallel simulation method for cascading failures of relay protection and safety automatic devices, comprising the following steps: adopting user-defined methods to model relay protection and safety automatic devices; performing network segmentation, and distributing relay protection and safety automatic devices Safety automatic device model; communication interface initialization; calculation of relay protection and safety automatic device model input and output; relay protection and safety automatic device model initialization calculation; relay protection and safety automatic device model output processing; power grid and relay Simulation calculations of protection and safety automatic device models. The invention adopts the parallel computing structure based on the message passing programming model MPI, deploys multiple subnet processes and external processes, and simulates the power grid and relay protection and safety automatic devices in parallel; at the same time, the subnet processes and external processes can be deployed on different computer nodes ; and the object-oriented design is used to realize the modeling and simulation of a large number of relay protection and safety automatic devices, which makes the simulation have good scalability and adaptability.
Description
technical field [0001] The invention relates to a simulation method, in particular to a parallel simulation method for cascading failures of relay protection and safety automatic devices. Background technique [0002] The electromechanical transient simulation of large-scale power grids is still one of the important means to study cascading faults in large-scale power grids. The main process is to simulate the cascading failure mode of the power grid by establishing a power grid model and component model that conform to the actual physical process of the power grid, calculate and analyze the evolution process and consequences of the cascading failure of the power grid, and provide measures to prevent the spread of cascading failures in the power grid Wait. [0003] The difficulty of cascading fault simulation in the electromechanical transient simulation of large-scale power grids lies in the simulation of the characteristics of some automatic action devices in the power gr...
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IPC IPC(8): G06F9/455
Inventor 余晓鹏徐得超张振安李亚楼刘巍徐树文朱全胜夏天朱旭凯
Owner STATE GRID CORP OF CHINA
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