Siping Power Supply Company

Jilin, China

Siping Power Supply Company

Jilin, China
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Wang J.,Shanghai JiaoTong University | Zheng Y.,Shanghai JiaoTong University | Yao G.,Shanghai JiaoTong University | Wang X.,Shanghai JiaoTong University | And 2 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2011

The single-phase shunt APF is taken as the hardware platform in studying the balance between convergence speed and steady state accuracy of adaptive harmonic current detection algorithm. The dynamic factor least mean square based on the adaptive noise cancellation technology is proposed to detect APF harmonics. The momentum term is introduced and the estimated mean of error signal in adjacent time point is used to control the updating of step size, which greatly increases the convergence speed. The dynamic factor term is applied to adjust the error again. Performance analysis is carried out for the proposed algorithm. Simulation and APF experiments show its faster dynamic response, less steady state offset under low SNR conditions and better anti-noise capability.


Liu J.,Shanghai JiaoTong University | Zheng Y.,Shanghai JiaoTong University | Yao G.,Shanghai JiaoTong University | Zhou L.,Shanghai JiaoTong University | And 3 more authors.
Lecture Notes in Electrical Engineering | Year: 2014

In order to solve the neutral-point imbalance problem and to improve the control precision of three-phase four-wire STATCOM, this chapter focused on the three-phase four-wire STATCOM control method based on neural network PI controller. First by analysis of the voltage imbalance problem of the split capacitors in three-phase four-wire STATCOM, a neutral-point balance control method based on the zero-sequence current is proposed. Then in order to improve the control precision, the neural network PI controller is introduced into three-phase four-wire STATCOM. Finally, the neutral-point balance control and neural network PI controller are combined together to get the neural network triple close-loop control method. Simulation result illustrates that the proposed control method is capable of neutral-point balancing control in three-phase four-wire STATCOM and the control precision is higher than that of the conventional control method. © 2014 Springer Science+Business Media New York.


Huang K.,Shanghai University of Electric Power | Wang X.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | Xiu S.H.,Siping Power Supply Company
Advanced Materials Research | Year: 2014

Economic Load Dispatch (ELD) is a critical matter of improving the operating efficiency of power system and reducing the cost of generating electricity. In this paper, an Artificial Fish Swarm Algorithm (AFSA) which takes network loss into account is designed to search the optimization. Firstly convert the capacity of the generating units in decimal into a binary number which means the location of an artificial fish. And then foraging behavior of fish school algorithm is utilized to make a successive comparison of fitness within the visual distance of current fish. Additionally to avoid getting into local optimization, the position of current fish is changed with a small probability. The simulation results suggest that the algorithm is efficient and feasible in the case of less precision. © (2014) Trans Tech Publications, Switzerland.


Wang C.,Shanghai JiaoTong University | Wang X.,Shanghai JiaoTong University | Yao G.,Shanghai JiaoTong University | Zheng Y.-H.,Shanghai JiaoTong University | And 2 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2012

A mathematical model of reactive power in the distribution network optimal allocation is established, in which the least active power loss is taken as objective function and node voltage beyond limit and the generator reactive power output beyond limit as penalty function. Then the chaotic particle swarm optimization based on golden section (GCPSO) is designed to calculate the above model. This method divides the particle swarm into standard particle and chaos particle using the judge principles based on golden section according to the level of fitness. It solves the problems of easily falling into local optimum if using PSO and repeating searching part of the solution if using chaotic optimization. Using GCPSO can be more effective in searching the global optimal solution, and the speed of reactive power optimization can also be improved. The algorithm is thus more applicable to solving the problem. The simulation results show that the method is technically feasible and effective.


Zhou C.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Yao G.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

Aiming to dealing with the problems of power factor compensation and the limitations of the conventional PI controller in the Static Synchronous Compensator (STATCOM), a new control strategy based on multi-model and neural network PI controller is proposed. This control scheme applied the multi-model and neural network technology to the PI controller to meet the accuracy and speed of the power factor compensation under different impact loads. Meanwhile, the neural network technology is used to tune the PI controller parameters values according to an optimal control law, which can meet the requirements of full range working conditions and optimality. Simulation experiments show that compared to the traditional PI controller, PI controller based on multi-model and neural network is proved to be better capable of adapting to the changes of impact loads with a higher compensating precision, which makes the power factor maintained at about 1 after compensation. © (2014) Trans Tech Publications, Switzerland.


Huang K.,Shanghai University of Electric Power | Wang X.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | Liu Y.L.,Siping Power Supply Company
Applied Mechanics and Materials | Year: 2014

To analyze the influence of distribution network with grid-connected photovoltaic (PV) generation on the power supply reliability, in this paper it firstly regards interconnected PV generation as an equivalent generator with rated capacity as well as the island operation mode of PV to set up a model for reliability calculation and analysis. Based on the network equivalent method, the structure of distribution system with PV is simplified and then the reliability indexes of distribution system are worked out based on Failure Mode and Effects Analysis (FMEA). At last, a comparative calculation between the distribution network with incorporated PV generations and that without PV generations is made. After analyzing a real example, the results suggest that integrating PV power generations reasonably into the distribution network can enhance the reliability of whole distribution system. © (2014) Trans Tech Publications, Switzerland.


Zheng L.C.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Wang X.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | Xiu S.H.,Siping Power Supply Company
Advanced Materials Research | Year: 2014

Sensorless control of PMSM is becoming increasingly important among the whole control system. This paper introduced Integral Separation Technology to the PI regulators to decrease overshoot or oscillation of the system. In addition, on the basis of the mathematical model of PMSM, Vector Control System for PMSM is got. Then a simplified model reference adaptive method using the zero excitation current control to modify the adaptive rate is given. At last, the corresponding waveforms are presented and the reasonability and validity has been proved by the simulation. © (2014) Trans Tech Publications, Switzerland.


Li X.G.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Wang X.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | Liu Y.,Siping Power Supply Company
Advanced Materials Research | Year: 2014

Due to today's energy shortage and low efficiency of the photovoltaic conversion, the solar charging technology becomes more and more important. In this paper, the design of a solar powered battery charger with both pulse charging method and maximum power point tracking method is proposed. While the photovoltaic panels' output power is small, the pulse charging method is used to prevent lead-acid's sulfation reaction. The maximum power point tracking method is used while the photovoltaic panels' output power is large to increase the charging efficiency. In the end, an application result is given out to demonstrate the effectiveness of the solar charger. © (2014) Trans Tech Publications, Switzerland.


Jiang H.,Shanghai University of Electric Power | Wang X.,Shanghai JiaoTong University | Zheng Y.H.,Shanghai JiaoTong University | Li L.X.,Shanghai JiaoTong University | Liu Y.,Siping Power Supply Company
Advanced Materials Research | Year: 2014

This paper deals with the study of air-condition temperature control, which is a complex system of time varying, nonlinear, imprecise model and uncertain work environment. In this paper, a multiple models fuzzy PID controller is designed. Considering the air-condition temperature adjustment system to combat aircraft and the frequently changing external environment the multiple fuzzy PID controllers are estimated according to the temperature changing area. Each time, based on temperature tested, only one fuzzy PID Controller is chosen to improve the control precision. At the end, simulation results show that multiple model fuzzy PID control is superior to the single fuzzy PID control, which effectively improve the transient response of the system, the steady state accuracy and robustness, having good prospects for engineering applications. © (2014) Trans Tech Publications, Switzerland.


Liu N.,Shanghai JiaoTong University | Zhou L.,Shanghai JiaoTong University | Yao G.,Shanghai JiaoTong University | Li L.,Shanghai JiaoTong University | And 2 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2012

A design of dual loop-feedback H ∞ controller is proposed according to the requirement for system robustness. The DVR (Dynamic Voltage Restorer) principle is briefly introduced and the state equations of nominal object are formulated based on the mathematical system model. Three weighting functions required in the mixed-sensitivity optimization design are selected according to the requirements for system performance to obtain the generalized state space realization of the controlled object. The H ∞ controller is obtained by solving two algebraic Riccati equations, which is applied in DVR to guarantee the system stability and to have some immunity from the changes of loads and system parameters. Simulative results verify its validity.

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