Simulation Model Of Power Grid Research Articles

A Cost-Effective Current-Limiting Hybrid DC Circuit Breaker Based on Hybrid Semiconductors

DC circuit breakers (DCCBs) are the key equipment to rapidly interrupt the fault current in high-voltage DC power grids and ensure the safe operation of the system. However, most DCCBs do not take current-limiting measures and rely solely on current-limiting reactors in the system to limit the rate of current rise during the interruption process. The extensive use of fully controlled power electronic devices in circuit breakers (CBs) results in high costs. To address the issues above, this paper proposes a DCCB topology with a current-limiting function based on thyristors and diodes, which can reduce the cost of CB while ensuring reliable interruption. The impact of various parameters on CB performance is analyzed using numerical calculations to optimize the parameters. Then, a simulation model of a 500 kV/16 kA DCCB is built in PSCAD/EMTDC, and the performance of the proposed CB topology is compared with the other CB topologies. By comparison, the proposed DCCB topology can reliably isolate fault currents and reduce the amplitude of fault currents and the cost of CBs. Significantly, the energy absorbed by the metal oxide varistor (MOV) during the interruption process decreases by 64.2%, reducing the cost and volume of the MOV. Finally, the feasibility of the CB is further verified in the ±500 kV 4-terminal high-voltage DC power grid simulation model. The results show that the proposed DCCB topology can limit the fault current rise rate, interrupt and isolate the fault reliably, and reduce the cost.

Multi-objective optimization design of passive filter based on particle swarm optimization

Using particle swarm optimization algorithm, aiming at the investment cost, filtering effect and reactive power compensation ability of passive filter, the weight of each objective function is determined according to the dispersion order method, and the passive filter is designed by multi-objective optimization. In addition, the actual calculation is carried out by taking the power grid parameters of the self-elevating and self-propelled petroleum engineering ship of “Feng Long 01” as an example. Further, a ship power grid simulation model is built under the Matlab/Simulink environment to verify the practicality of the optimized passive filter design.

A Resilience Toolbox and Research Design for Black Sky Hazards to Power Grids

A structured collection of tools for engineering resilience and a research approach to improve the resilience of a power grid are described in this paper. The collection is organized by a two‐dimensional array formed from typologies of power grid components and business processes. These two dimensions provide physical and operational outlooks, respectively, for a power grid. The approach for resilience research is based on building a simulation model of a power grid which utilizes a resilience assessment equation to assess baseline resilience to a hazards’ profile, then iteratively selects a subset of tools from the collection, and introduces these as interventions in the power grid simulation model. Calculating the difference in resilience associated with each subset supports multicriteria decision‐making to find the most convenient subset of interventions for a power grid and hazards’ profile. Resilience is an emergent quality of a power grid system, and therefore resilience research and interventions must be system‐driven. This paper outlines further research required prior to the practical application of this approach.

Simulation and Visualization System of Power Grid Security Checking

Power grid dispatching plays an important role in the safe and stable operation of power grid. Integrated dispatching system monitor and analysis substation equipment, transmission equipment in a unified mode. Simulation model of power grid dispatching safety checking system is built, to realize the stability analysis and safety monitoring function for checking and validation. According to the grid’s CIM data, a node merging algorithm of network topology is proposed for building power grid topology rapidly. The power grid safety analysis and visualization platform is designed, with a graphical data management. The research results are applied in the State Grid Taizhou Electric Company dispatching integration system, and it works fine.

OpenGridMap: towards automatic power grid simulation model generation from crowdsourced data

OpenGridMap is an open source project that crowdsources realistic power grid data to be used for research purposes. In this paper, we propose an approach for the automatic generation of power gird simulation models from crowdsourced data. The proposed approach orders the crowdsourced data into a power circuit relation which is then used to produce a CIM description file and subsequently a power grid simulation model. We provide experiments which demonstrate the effectiveness of the approach on OpenGridMap data. Given the large amount of crowdsourced data available, our approach has the potential to generate power grid simulations of larger size, more variety and more accuracy than the currently available state-of-the-art test power grids.

Power grid simulation model for long term operation planning

In this paper a comprehensive mixed-integer linear programming (MILP) model of transmission network and power plants is presented. The model is capable of forced and regular outage simulation with respect to the spinning reserve requirements. The model formulation includes thermal, pumped-storage and conventional hydro plants as well as renewable resources. Fast and efficient outage scheduling algorithm suitable for prospective studies is presented. We also show how the overall price minimisation can lead to unrealistic pumped-storage plants dispatch and how can this behaviour be corrected using hydrothermal decomposition. To overcome this issue a dedicated MILP water planning model is proposed and its results are compared to the real day production profiles of pumped-storage and conventional hydro plants. The simulation times and results of models with and without hydrothermal decomposition are compared on an annual simulation of Czech transmission network (61 power plants, 110 units and 31 nodes connected by 53 lines). Simulations produced by the model presented in this paper exhibit realistic transmission system behaviour, which was confirmed by the Czech TSO. The annual simulation times stay below reasonable values allowing multiple scenario prospective studies.

Power Grid Simulation Model for Long Term Operation Planning

Power Grid Simulation Model for Long Term Operation Planning

The Analysis on Voltage Stability of Power System Including Different Wind Generator

Output power characteristic of wind generator has different influence on PCC voltage stability, which consists of three kinds wind generator- constant speed induction wind generator, doubly-fed variable speed constant frequency (VSCF) wind generator(DFIG), and direct-driven permanent magnetic synchronous generator ( PMSG).This article establishes simulation model of power grid interconnected by wind farm under Matlab environment, and writes flow calculation procedures. The simulation results show that doubly-fed VSCF wind generator and direct-driven PMSG can improve PCC voltage stability when the fault happened in wind power grid integration.