scholarly journals PHOTOVOLTAIC BASED BALANCING LOAD DISTRIBUTION FEEDERS USING LOOP POWER CONTROLLERS

2014 ◽  
pp. 105-111
Author(s):  
E. VENKATESH ◽  
S.SIVA PRASAD
Keyword(s):  
Phase Shift ◽  
Load Distribution ◽  
Power Loss ◽  
Power Flow ◽  
Reactive Power ◽  
Active Power ◽  
Power Controller ◽  
Voltage Ratio ◽  
Power Loading ◽  
Set Up

Balancing load of distribution feeders is significant for falling of power loss and mitigating power flow. As the loop power controller is implanting for the active power and reactive power flows by change in voltage ratio and phase shift. So that the balancing of the load distribution feeders can be achieved. However it can include photovoltaic power producing in feeder balancing load, as a Taipower distribution feeder consisting of two feeders with large amount of photovoltaic equipment considered. The balancing load can be determine in distribution feeders with photovoltaic set up by using the loop power controllers as the changing of solar energy and power loading of feeders. With implanting the control algorithm in MATLAB for loop power controller by changing the voltage ratio and phase shift connecting to the feeder the proper amount of active power and reactive power can be change from the heavily loading feeder to the lightly loading feeder. When system power loss decreases, Photovoltaic balancing the load for loop power controller has been investigated.

scholarly journals REDUCTION OF ACTIVE POWER LOSS BY PIONEERING POLL ALGORITHM

2017 ◽  
Vol 5 (11) ◽  
pp. 139-148
Author(s):  
K. Lenin
Keyword(s):  
Political Parties ◽  
Power Loss ◽  
Reactive Power ◽  
Solution Space ◽  
Active Power ◽  
The People ◽  
The World ◽  
Simulation Results ◽  
Set Up ◽  
Power Problem

This paper projects Pioneering Poll (PP) algorithm, which inspired by poll around the world is used to solve optimal reactive power problem. In Pioneering Poll (PP) algorithm population is general people and each person may be a candidate or a voter. Definite number of people will form dissimilar groups to set up political parties in the solution space. Advertising movement is the fundamental of this Pioneering Poll (PP) algorithm and it contains three core phases: sanguine campaign, disparate campaign and union campaign. During sanguine campaign, the nominee proclaims themselves through accentuate their positive descriptions and potentials. In the disparate campaign, candidates challenge with each other to raise their status and malign their contender. In extraordinary cases, the candidates that have equivalent information can united together in order to increase the possibility of success of the joint party. Campaign positively grounds the people to congregate to a state of solution space that is the comprehensive optimum. All these determinations lead up to poll day (end condition). On poll day, the candidate who is acquiring maximum votes is proclaimed as the conqueror and it matches to the supreme solution that is found for the reactive power problem. The proposed Pioneering Poll (PP) algorithm has been tested in standard IEEE 118 & practical 191 bus test systems and simulation results show clearly about the enhanced performance of the proposed Pioneering Poll (PP) algorithm in reducing the real power loss with voltage profiles are within the limits.

Studies on Power Distribution of AC and VSC-HVDC Hybrid System for Wind Power Integration

2013 ◽  
Vol 676 ◽  
pp. 204-208 ◽  
Author(s):  
Yue Qiang Zhang ◽  
Yong Qiang Zhu ◽  
Yan Zhang Liu
Keyword(s):  
Wind Power ◽  
Hybrid System ◽  
Power Distribution ◽  
Power Loss ◽  
Reactive Power ◽  
Good Method ◽  
Transmission Capacity ◽  
Distribution Strategy ◽  
Wind Power Integration ◽  
Set Up

In order to study the power distribution strategy of AC and VSC-HVDC hybrid system for wind power integration, a strategy based on improving the transmission capacity of AC lines and reducing the power loss is proposed. By use of the decouple control of active and reactive power of the VSC-HVDC, the transmission capacity of the AC lines can be improved by absorbing enough reactive power, AC lines have the priority before they have reached their transmission limit, meanwhile the VSC-HVDC acts as STATCOM. When the AC lines have been fully used, the VSC-HVDC will act as STATCOM as well as transmit the rest power. A DFIG wind power integration system is set up by use of PSCAD/EMTDC, the simulation results show that the power distribution strategy can realize the wind power integration successfully and reduce the power loss, it can regard as a good method for wind power integration.

scholarly journals An Enhanced Quantum-Behaved Particle Swarm Algorithm for Reactive Power Optimization considering Distributed Generation Penetration

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Runhai Jiao ◽  
Bo Li ◽  
Yuancheng Li ◽  
Lingzhi Zhu
Keyword(s):  
Distributed Generation ◽  
Power Loss ◽  
Reactive Power ◽  
Power Optimization ◽  
Particle Swarm ◽  
Active Power ◽  
Particle Swarm Algorithm ◽  
Reactive Power Optimization ◽  
Distributed Generations ◽  
Better Than

This paper puts forward a novel particle swarm optimization algorithm with quantum behavior (QPSO) to solve reactive power optimization in power system with distributed generation. Moreover, differential evolution (DE) operators are applied to enhance the algorithm (DQPSO). This paper focuses on the minimization of active power loss, respectively, and uses QPSO and DQPSO to determine terminal voltage of generators, and ratio of transformers, switching group number of capacitors to achieve optimal reactive power flow. The proposed algorithms are validated through three IEEE standard examples. Comparing the results obtained from QPSO and DQPSO with those obtained from PSO, we find that our algorithms are more likely to get the global optimal solution and have a better convergence. What is more, DQPSO is better than QPSO. Furthermore, with the integration of distributed generation, active power loss has decreased significantly. Specifically, PV distributed generations can suppress voltage fluctuation better than PQ distributed generations.

Reactive Power Compensation of Oilfield Distribution Systems Based on Tabu Search Algorithm

2013 ◽  
Vol 397-400 ◽  
pp. 1113-1116
Author(s):  
Xiao Meng Wu ◽  
Wang Hao Fei ◽  
Xiao Mei Xiang ◽  
Wen Juan Wang
Keyword(s):  
Power Loss ◽  
Distribution Systems ◽  
Reactive Power ◽  
Search Algorithm ◽  
Global Optimum ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Voltage Profile ◽  
Voltage Range ◽  
Shunt Capacitors

In order to solve the problem in reactive power compensation of oilfield distribution systems at present, a Taboo search algorithm is proposed in this paper, by which the optimal location and size of shunt capacitors on distribution systems are determined. Then the voltage profile is improved and the active power loss is reduced. In this paper, Voltage qualified is used as objective function to search an initial solution that meets the voltage constraints so that it is feasible in practicable voltage range; then the global optimum solution can be got when taking the reduced maximum of active power loss as objective unction. The examples show that the improved algorithm is feasible and effective.

Research of Improved On-Line Power Flow Method

2014 ◽  
Vol 986-987 ◽  
pp. 1651-1654
Author(s):  
Hai Bao ◽  
Ling Wang ◽  
Yu Long Chen
Keyword(s):  
Convergence Rate ◽  
Power Flow ◽  
Measurement Accuracy ◽  
Reactive Power ◽  
Active Power ◽  
Flow Method ◽  
Calculation Results ◽  
On Line ◽  
Power Flow Method

Based on measurement accuracy of reactive power lower than the accuracy of active power and voltage magnitude, this paper proposes an improved on-line power flow method. Through simulation, compared with the conventional power flow, this method improves the accuracy of the calculation results and also has obvious advantages on the convergence rate. Finally, the article analyzes the reasons for this situation.

Magnetically Controlled Reactor Tap Ratio Optimization Research

2013 ◽  
Vol 805-806 ◽  
pp. 1017-1021
Author(s):  
Hai Peng Liu ◽  
Zhong Dong Yin ◽  
Shao Mi Duan
Keyword(s):  
General Formula ◽  
Power Loss ◽  
Reactive Power ◽  
Theoretical Foundation ◽  
Optimal Algorithm ◽  
Response Speed ◽  
Active Power ◽  
Practical Application ◽  
Controllable Reactor ◽  
Ratio Optimization

The tap ratio of magnetic controllable reactor (MCR) has an important influence on the response speed and active power loss. With various applications of MCR, the focuses of MCRs response speed and active power loss are different, which makes the design of the tap ratio different. According to MCRs most widely application--- power system reactive power voltage control---the effect of the tap ratio on the response speed and active power loss was considered. The tap ratio of magnetic controllable reactor was optimized based on the dynamic optimal algorithm of MATLAB, which made the response speed and the active power loss of MCR stay in the equilibrium optimal state, and a general formula was given. Through the simulations of ANSYS and PSCAD software, the feasibility of this theory is verified, and a solid theoretical foundation for the wider practical application of magnetic controllable reactor is provided.

Reactive Power Optimization in Distribution Network with PV Station Based on Intelligence Algorithm

2013 ◽  
Vol 753-755 ◽  
pp. 2429-2432
Author(s):  
Xin Wei Ren ◽  
Jian Zheng Xu
Keyword(s):  
Power Loss ◽  
Reactive Power ◽  
Optimal Solution ◽  
Active Power ◽  
Reactive Power Optimization ◽  
Pv System ◽  
Voltage Level ◽  
Bacterial Colony ◽  
Calculation Results ◽  
Power Problem

Reactive power problem of PV station in distribution power system is discussed. Probability theory is introduced to calculate the expectation of active power, which is approximately used to replace the randomly changing output. Reactive output can be adjusted by changing some related parameters of the grid-connected PV system. Considering reactive power of PV station as control variables, a model with voltage level constraints of minimizing the active power loss is established and its optimal solution is figured out with IBCC (Improved Bacterial Colony Chemotaxis). Case calculation results show the validity of above-mentioned model and algorithm.

scholarly journals A DC Voltage Control Strategy for Active Power Filter

2016 ◽  
Vol 10 (1) ◽  
pp. 166-180
Author(s):  
Xudong Cao ◽  
Shaozhe Zhou ◽  
Jingze Li ◽  
Shaohua Zhang
Keyword(s):  
Power Loss ◽  
Reactive Power ◽  
Active Power Filter ◽  
Active Power ◽  
Voltage Control Strategy ◽  
Dc Voltage ◽  
Power Filter ◽  
Voltage Controller ◽  
Dc Voltage Control ◽  
The Stability

Active Power Filter (APF) is capable of changing the size and frequency of harmonics as well as changes in reactive power compensation. It is important to control the stability of the DC-link capacitor voltage stability for it. For DC voltage controls of APF, there are two important achievements. First, it is indicated that the control of DC voltage directly affects the compensation performance of APF. Second, the value of DC voltage influences the power loss of APF. This paper firstly introduces the design of the DC voltage controller. Then the relationship between DC voltage and the power loss as well as the compensation performance of APF is analyzed. Finally, a new control scheme with a droop controller is developed to regulate DC voltage.

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