Summary. In this article the effective algorithm of optimization of power networks regime on voltages of nodes with controllable reactive power  is offered. The results of research of calculation quality of the offered algorithm are presented.

Key words: power network, power losses, optimization of regime, algorithm of optimization, criterion function, limitations, iterative process, acceleration coefficient.

Abstract: The features ensuring the economic security of the state in the development of the knowledge economy, discovered and described the threat to economic security of the national economy, which are characteristic of the knowledge economy, determined that innovative development can increase the security level of the state economy, it is proved that the development of the knowledge economy allows empower the world economy, raise living standards, ensure the acceleration of scientific and technological progress.

Keywords: state, economy, economic security, knowledge economy, threats, innovative development.

Summary: The article analyzes and summarizes the world experience of investment attractiveness as the example of China's economy. Analyzed measures of improve the investment climate in the country, using the experience of foreign countries in the current Ukrainian realities.

Key words: foreign investment, investment climate, region, economic growth and local government.

Summary. The article addresses methodological approaches to the development of strategic plans for businesses. The author highlights the importance of strategic plans and the existence of different approaches their formation, emphasizes the major trends and common approaches for their development.

Keywords: strategic plan, strategic planning, strategy, implementation of the strategy, enterprise, purpose, mission, analysis, internal environment, external environment, control.