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Integrated AC/DC Systems Power Flow Solution Using Improved Broyden Approach

Author: ZengChao
Tutor: PengJianChun
School: Hunan University
Course: Proceedings of the
Keywords: High voltage DC (HVDC) AC and DC systems Flow calculation Improved burro Eden
CLC: TM721.3
Type: Master's thesis
Year: 2008
Downloads: 226
Quote: 2
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Abstract


The HVDC power adjustment fast and reliable operation , and has a great advantage in the high-capacity long - distance transmission of occasions and grid interconnection . Therefore has an extremely important role in the development strategy of China's \However , due to the complexity of the AC-DC hybrid systems , pure AC system power flow calculation method has been very into or hybrid AC-DC system flow calculation does not achieve the same level . To this end, this paper carried out in-depth and meticulous research . Trend of hybrid HVDC system This paper begins with a brief overview of the development of the domestic and foreign high-voltage direct current transmission technology , AC-DC hybrid transmission system of the status quo and urgent problem . Then introduced the common flow calculation method of the steady-state mathematical model of the inverter for AC and DC power flow calculation , and AC-DC hybrid system : unified iterative method and the alternating iterative method . Next for solving nonlinear equations burro Eden and its improvement principles and steps of the method detailed analysis , pointed out that the main advantage is to avoid each iteration of the Newton method are required to calculate the state function in the current iteration of derivative or difference quotient approximation of the defect in order to determine the new direction , and therefore high computational efficiency . In turn will improve the burro Eden method is applied to AC DC hybrid system load flow calculation , the calculation steps , the design and preparation of the flow calculation program . Finally, for this paper, the calculation method based on improved burro Eden of AC and DC trend , the IEEE test system simulation and analysis . The calculation results show that the new method proposed in this paper has a quasi-Newton method is characterized by relatively high computational efficiency . Flow calculation method proposed in this paper not only program is simple , and has broad applicability for different grid structure and operation mode . The trend calculation hybrid AC-DC system power flow calculation method based on improved burro Eden Act fast and reliable AC and DC systems provide an effective way . Its cross- DC hybrid system running behavior research has important theoretical and practical significance .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Transmission and distribution technology > Transmission system > Hybrid Transmission
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