The Research Of Multi-machine Power System Transient Stability Analog Simulation Method Based On VLSI

Currently, the transient stability is investigated either by discrete analog scaled-down models that emulate the behavior of the real network, or by numerical calculations. As they both have own defaults, for example, the physical simulation can only simulate a limited system and the cost is very high, the numerical method can not reach the real-time speed and may have numerical stability problem. The method to utilize analog VLSI circuits to accelerate the transient stability was presented by R.Fried, etc, that is use the character of electronics to model the power system, so as to simulate the dynamic behavior of power system. This method can run in a speed more faster than real speed, it has a low cost and the simulation system is easy to be reconfiguration.Based on analog VLSI simulation idea, this paper studied its application in multi-machine system. Firstly, the analog models of the generators is divided into four parts—swing equation solving block, signal processing block, machine-network interface block and electromagnetism power solving block, then the transmission line network and the loads analog model are presented, respectively.Then, the study moves down to the circuit level. The detailed implementations of circuit blocks, such as gain, sum, multipliers, VCVS(Voltage Controlled Voltage Source ) and VCCS(Voltage Controlled Current Source ), are discussed. At last, an example of 3 generator 9 bus system is used to test the analog VLSI model of multi-machine suggested by this paper. The simulation is done by OrCAD9.2 and the simulation result is compared with the result of step-by-step method done by MATLAB.