To solve the regional and provincial grid coordination optimization problem for active power dispatch in AC/DC interconnected power system with wind power integration

an optimization model is developed with total fuel consumption of generators and power loss of AC-DC tie-line as two objective functions. Spinning reserve constraints required by provincial network to cope with the randomness of wind farm power output

and security constraints of the inter-provincial AC tie-line sections are both considered. The decision variables are the adjustment of power output of provincial generators and the adjustment of power transmission of inter-provincial DC links. In order to reduce the dimension of decision variables

a practical selection strategy for the compression of the coordinative units is proposed

and a DC power flow model is adopted to approximately describe the relationship between power transmission in the AC link and the injected power of nodes

and the relation between power loss of AC link and the injective power of nodes. The normal boundary intersection (NBI) method and the primal-dual interior point method are adopted to obtain the uniformly distributed Pareto optimal solution set. According to the fuzzy membership and entropy weight method

a compromise optimal decision is selected from Pareto optimal solution set. By taking an actual large-scale AC/DC interconnected power grid as an example

it has been found that the results of the regional and provincial grid coordination dispatch demonstrate the effectiveness of the proposed optimization model and solving algorithm

showing that the compromise optimal dispatch scheme has better economic benefit than the dispatch scheme before coordination optimization. This work is supported by National Basic Research Program of China （973 Program）(No. 2013CB228205) and National Natural Science Foundation of China (No. 51207056).