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7. Design and Study on a Self-Controlled Walking Car

Author

Ni, Hongjun, primary, Zhang, Jiaqiao, additional, Lv, Shuaishuai, additional, Wang, Xingxing, additional, Zhang, Shouyang, additional, Zhao, Nansheng, additional, Gu, Hai, additional, Li, Bin, additional, and Jiang, Jie, additional

Published
2018
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10. The Calculation and Analysis of SINOPEC Tianjin Company's OPF

Author

Zhu Yi-ran, Liu Xin, Zhou Xue-song, Zhou Xuan-zheng, Gu Hai-qing, and Ma You-jie

Subjects
Generator (circuit theory), Electric power system, Engineering, Power system simulation, business.industry, Revenue, Control engineering, Node (circuits), AC power, business, Automotive engineering, Voltage, Compensation (engineering)
Abstract

Structural features has been analysed after the third part of SINOPEC Tianjin company’s power system been put into operation. Node voltage been treated as the constraint, minimum power loss been treated as the objective function, used PSASP to calculated the different way of generator’s combination, the voltage ???power flow ???power loss has been compared before and after the OPF calculation. The conclusion indicated that, by changing the active power and reactive power of generators ???OLTC and reactive-load compensation equipments, the system’s power flow operated more reasonable and economical. The enterprise revenue has been maximized. This is instructive and meaningful to the operation of SINOPEC Tianjin company’s power system.

Published
2010

11. Check Circuit Breaker Rupturing Capacity in Industrial Electric Power Network

Author

Zhou Xuan-zheng, Gu Hai-qing, Zhu Yi-ran, Liu Xin, Ma You-jie, Zhou Xue-song, and Yang Hai-shan

Subjects
Electric power system, Engineering, Electrical load, business.industry, Residual-current device, Electrical engineering, Arc-fault circuit interrupter, Electric power, Single-phase electric power, business, Earthing system, Circuit breaker
Abstract

This paper took the check of rupturing capacity circuit breaker in petrochemical electric power network for example. It introduced the selection rule of largest short-circuit current which flow through circuit breaker, the principle of short circuit calculation, the equivalent model of external system, the modeling of mathematical model of industrial electric owned power network, and the procedures of short circuit calculations. At same time, the different short-circuit current was calculated which flow through the circuit breaker in both original petrochemical electric power network and the rebuilding one. At last, the simulation example proved that the margin of short-circuit current is less and less or even exceeding with the growth in the loads, increasing in self-power supply and external system in industrial electric power network. The industrial should pay sufficient attention to it.

Published
2010

12. Static Security Analysis Applies in the Network of SINOPEC Tianjin

Author

Zhou Xuan-zheng, Liu Xin, Zhou Xue-song, Zhu Yi-ran, Ma You-jie, and Gu Hai-qing

Subjects
Security analysis, Engineering, business.industry, Static analysis, computer.software_genre, Computer security, Power (physics), Simulation software, Reliability engineering, Electric power system, Power system simulation, Power-flow study, Power-system protection, business, computer
Abstract

It is of great significance for us to research security problems in the power system. After choosing static security, related theories and methods to be main research object, we calculate power flow and use transferring load as safety countermeasures for power restoration at the same time. Here, we select the Newton method. Then, making the static analysis module of PSASP as the electric power system simulation software to apply in analyzing power flow and N-1 open circuit, which is under the biggest operation in petrochemical system. At last, we get related overload information in order to inspect whether the operation method and the connection mode of SINOPEC network is safe, and facilitate the ability of risking given accident, and take corrective actions at last.

Published
2010

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