Читать книгу All sciences. №7, 2022. International Scientific Journal - Ibratjon Xatamovich Aliyev - Страница 13

UDC 004.94

Kuldashov Obbozjon Xokimovich

Doctor of Technical Sciences, Professor of the Scientific Research Institute “Physics of Semiconductors and Microelectronics” at the National University of Uzbekistan
Dadazhonov Tulanboy
Senior Lecturer of the Department of Electronics and Instrumentation of the Fergana Polytechnic Institute

Fergana Polytechnic Institute

Annotation. A model of joint operation of a micro – hydroelectric power plant and a geothermal water facility has been developed, taking into account their main technical and technological characteristics in a wide range of operating conditions, including rotor rotation speeds, generator excitation voltage, generator phase currents and output voltages in general.

Keywords: micro – hydroelectric power plant, model, HydraulicTurbine and Governor (HTG) unit, rotor rotations, generator excitation voltage, generator phase currents and output voltages.

Аннотация. Разработана модель совместной работы микро – ГЭС и объекта геотермальной воды, с учётом их основных технико-технологических характеристик в широком диапазоне эксплуатационных условий, в том числе скорости вращения ротора, напряжение возбуждения генератора, фазные токи генератора и выходные напряжения в целом.

Ключевые слова: микро – ГЭС, модель, блок HydraulicTurbine and Governor (HTG), вращения ротора, напряжение возбуждения генератора, фазные токи генератора и выходные напряжения.

The microelectric power plant model consisting of a hydraulic turbine and a synchronous generator is shown in Fig.1. The Hydraulic Turbine and Governor (HTG) unit is a model of a hydraulic turbine with a control system. The control system includes a proportional differential (PID) controller and a control servo motor [1]. The general scheme of the model is shown in Fig. 2.

Fig.1. microGES model

Fig. 2. Model of the control system

The required values of angular rotation speed (wref) and power (Pref) are fed to the first two inputs of the unit. The third and fourth inputs of the unit receive the actual values of the angular rotation speed (we) and active power (Pe). The fifth input is supplied with the deviation of the angular rotation frequency of the synchronous generator rotor (dw). The output signals are the mechanical power that must be supplied to the corresponding input of the synchronous machine unit (Rm), and the value of the hydraulic turbine gate opening (gate). Inputs 2 and 4 may remain unconnected if a signal about the shutter position is used as feedback, and not a speed deviation. Ice input and output values are measured in relative units.

The hydraulic turbine itself is modeled by a nonlinear system shown in Fig. 3.

Fig. 3. Hydraulic turbine model

The servomotor controlling the turbine gate is modeled by a second-order system (Fig.4).

Fig. 4. Servomotor model

The window for setting parameters of the Hydraulic Turbine and Governor (HTG) block is shown in Fig.5.

Fig.5. Window for setting parameters of the Hydraulic Turbine and Governor block

Unit parameters (HTG) :