Autoballast systems of stabilizing the operating regime of (microHESs) are presently becoming rather widespread [1, 2]. Among their virtues are maximum simplicity of the hydraulic structures in which are used mechanically unregulated turbines or pumps operating in a turbine regime, good speed of response providing stabilization of the output voltage with a sufficient accuracy, and possibility of using general-purpose quantity-produced equipment, which makes it possible to construct comparatively cheap energy sources. The most important element of the microHESs under consideration, which provides the necessary quality of the ac voltage being generated, is the system of regulating the ballast load connected to the generator output in parallel to its main electrical load. The ballast load provides constancy of the operating regime of the turbine--generator--load system regardless of disturbing effects, the main one of which is a change in the power of the useful electrical load of the station. The regulators of the autoballast are usually made with semiconductor devices, most often with thyristors. Optimization of the parameters of the autoballast system is possible only on the basis of a system approach with consideration of the characteristics of all elements figuring in a microHES: turbine, generator, electrical load, and stabilization devices. An important problem, on the solution of which depend the weight--size indices of the unit, its cost, and regulating characteristics, is the selection of the type of generator. An analysis of the working conditions of a microHES shows that an autonomous operating regime is more simply realized for synchronous machines. This is determined by the fact that the weight--size and cost indices of induction generators with a capacitor bank necessary for its self-excitation are commensurate with the indices of synchronous generators, and the voltage regulating systems of synchronous machines are considerably simpler and cheaper [1]. The behavior of such a system is described by a system of nonlinear differential equations of a high order, which can be written in the form [1]