A risk assessment method for transmission network considering the influence of substations
A substation and transmission network technology, applied in the field of power transmission and distribution, can solve problems such as time-consuming, unsatisfactory evaluation accuracy, and difficulty in simulating the randomness of substation internal component failures
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[0169] Taking the IEEE-RTS79 test system as a calculation example, the influence factors of different substations on the risk assessment results of the transmission network are analyzed. The basic overview of the IEEE-RTS79 system is as follows: The total installed capacity of the IEEE-RTS79 test system is 3405MW, and the annual maximum load is 2850MW. The transmission system includes 24 nodes and 38 transmission lines, and two 230kV / 138kV substations. There are 17 load nodes; the 220kV substation composed of bus nodes 9, 10, 11, and 12 includes 4 incoming lines, 6 outgoing lines, and 4 transformers.
[0170] The evaluation process is as follows:
[0171] Assume there is a 5% deviation in substation component parameters.
[0172] Table 1 Reliability parameters of substation internal components
[0173]
[0174] In order to analyze the impact of different main wiring forms of substations on the power grid, the 3 / 2 circuit breaker wiring (Scheme 1), the double-bus wiring (S...
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