Analysis of protection performance in UHV transmission line with multi series capacitors compensation

Wang, X. G.; Du, Dingxiang; Zhou, Zhi

doi:10.1109/apap.2011.6180429

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…1)When the transmission line capacity decreases, it is equivalent to reduce of the cross section and increase the impedance of the be ensured [24]. Therefore, the increase of line impedance will further aggravate the voltage drop in the situation of forward power flow, and a similar phenomenon can be conducted in the situation of reverse power flow.…”

Section: Influence Of Transmission Line Capacity On Node Voltagementioning

confidence: 99%

Security and Economic Integration Scheduling of Electricity-Heat Integrated Energy System

Huang,

Fu,

Ding

2023

IEEE Access

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In order to address the uncertainty from the source and load side and guarantee the voltage safety of integrated electricity-heat energy systems, a security and economic integration scheduling of electricity-heat integrated energy system is proposed in this paper. Firstly, mathematical models of combined heat and power units, electric boilers, batteries and heat storage are formulated based on mathematical methods, and the power output of wind turbine and photovoltaic and the demand of electric load and heat load are respectively predicted by the back propagation (BP) neural networks based on genetic optimization. Secondly, an objective function including voltage safety and total operating cost is established, where the operation constraints of the power grid, heat network and individual device are also taken into consideration, and the optimal solution is provided by the simulated annealing particle swarms optimization (SA-PSO), which shows a good performance in solving the multi-objective optimization problem. Finally, comparative simulation schemes show the effectiveness and superiority of the proposed security and economic integrated scheduling, which can effectively improve the overall operation economy while ensuring the system voltage safety simultaneously.

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Section: Influence Of Transmission Line Capacity On Node Voltagementioning

confidence: 99%

Security and Economic Integration Scheduling of Electricity-Heat Integrated Energy System

Huang,

Fu,

Ding

2023

IEEE Access

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“…However, this method is mainly focused on the suppression of the power frequency overvoltage, therefore, it has no obvious effect on the oscillating overvoltage of the transmission process. To this end, the series compensation capacitor method is therefore presented in [6][7], and their simulation results showed that the switching overvoltage can be suppressed to some extent. But the method still cannot meet the overvoltage reference standard of the ultrahigh voltage operating and hence, it can only be used as the auxiliary method.…”

Section: Introductionmentioning

confidence: 99%

Energy Storage System Control Strategy for Restraining Overvoltage Caused by Switching Non-Load Power Transmission Lines

Yang¹,

Yu²,

Li³

et al. 2021

IEEE Access

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During the switching operation of the non-load power transmission lines, the undisired switching overvoltage issue is inevitable, causing grid voltage oscillations, waveform distortion and other phenomena at the end of the non-load power transmission lines, and even lead to the insulation breakdown, all above phenomena probably make the power transmission failure. To avoid the above harmful cases, the formation mechanism of the undisired switching overvoltage issue caused by switching non-load power transmission lines is first analyzed in detail. Based on this mechanism analysis, the energy storage system (ESS) based overvoltage suppression method and corresponding ESS voltage command synthesis algorithm are developed. The method can quickly and effectively restrain the voltage change rate and reduce the voltage difference between the initial value and the steady state value of the power transmission lines, so that the line voltage during the switching operation can be kept within the safety limit range. Finally, a simulation model was built by using MATLAB/Simulink software, and the simulation results verified the effectiveness of the proposed overvoltage suppression strategy. INDEX TERMS switching overvoltage, energy storage system (ESS), non-load power transmission lines, voltage command synthesis algorithm.

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A General Coordination Scheme for Zero-sequence Current Differential Protection on Series-compensated Multi-circuit Line

Huang

2020

2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2)

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Analysis of protection performance in UHV transmission line with multi series capacitors compensation

Cited by 4 publications

References 7 publications

Security and Economic Integration Scheduling of Electricity-Heat Integrated Energy System

Security and Economic Integration Scheduling of Electricity-Heat Integrated Energy System

Energy Storage System Control Strategy for Restraining Overvoltage Caused by Switching Non-Load Power Transmission Lines

A General Coordination Scheme for Zero-sequence Current Differential Protection on Series-compensated Multi-circuit Line

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