Abstract
The paper is devoted to the problem of the reliability analysis the functioning of the hybrid energy source based on the wind power plant (WPP) and the combined heat and power plant (CHPP). The main effect of the proposed technology is substituting a part of the fossil fuel used at CHPP (or other heat sources) for the production of electricity and thermal energy. At the same time, CHPP operates according to the heat schedule, i.e. in accordance with changes in the heat loads of consumers. In this regard, the attention in the study is focused on the problem of the reliability analysis of the heat supply (heating) from a hybrid energy source. To assess the reliability of heat supply, one of the main complex reliability index (RI) is used - the availability factor (AF), and the system of equations of a stationary markov process is used as a mathematical model of the states evolution of the studied object. Calculation of AF is made in accordance with seasonal changes in heat loads (annual heat load schedule); the heat storage effect of consumers (thermal inertia) and the factor of a possible decrease in wind speed are also additionally taken into account. Case study is carried out on a test circuit of the hybrid energy source (WPP+CHPP), as a result of which some analytical characteristics are obtained.
Highlights
One of the possible technologies for the joint operation of the wind power plant (WPP) and the combined heat and power plant (CHPP) is proposed by the authors in the form of a patent for invention [1]
To assess the reliability of heat output from a hybrid energy source based on WPP and CHPP or other heat source (HS), it is proposed to use one of the main comprehensive reliability index (RI), the availability factor (AF) noted as K, which can be calculate by the follow formula: K 1 [ ps (1 ω) α (1)α ], (1)
Methods and models to analysis the reliability of heat output from a hybrid energy source based on the WPP and CHPP are developed
Summary
One of the possible technologies for the joint operation of the wind power plant (WPP) and the combined heat and power plant (CHPP) is proposed by the authors in the form of a patent for invention [1]. The main idea behind the proposed technology is to use the wind power in the thermal cycle of the heat source (HS) as substituting a part of fossil fuel using for the generation of thermal and/or electricity energy depending on type of HS. For this the electric heating units (EHU) are integrated in the circuit of the HS – boiler plant (BP), CHPP and other types. The present study is devoted to the development of methods for the reliability analysis of such a hybrid energy source based on WPP and CHPP. The methods of the second group are based on the use of simulation algorithms in the framework of which usually statistical test method (Monte Carlo method) is applied to model possible states of the facility [11, 15, 16]
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