Research On Distribution Network Planning Considering Integrated Demand Response

Coal,oil and other fossil energy resources are limited and large-scale use will cause environmental pollution.How to ensure clean,sustainable supply of energy and make full use of the complementary characteristics of different energy sources is a common concern of all countries.For power grid planning,demand response measures have affected the planning scheme through the impact on the operation strategy.The traditional demand response refers to that the power supplier guides users to change their inherent power consumption mode by changing the power price or direct compensation,so as to reduce or shift the power supply load in a certain period of time.However,the current energy system includes power,natural gas,cooling,heating,transportation and other systems,and the single power demand response has gradually evolved into a variety Comprehensive energy demand response.By using the method of comprehensive demand response and the complementarity of energy resources,the overall response potential and customer satisfaction of users can be improved,so as to achieve economic optimization.In this context,this paper studies the following aspects from the impact of comprehensive demand response on distribution network planning(1)Based on the traditional power demand response,the significance of implementing demand response is analyzed,and a comprehensive demand response model is established.According to the relevant literature,the demand response is divided into price type demand response,incentive demand response and alternative demand response from the user’s behavior of participating in demand response,and the corresponding model is established.(2)From the perspective of users and distribution companies,a distribution network planning model considering the satisfaction of users’ participation in comprehensive demand response is established.Taking the minimum annual planning cost of distribution companies as the objective function,the power balance constraints、investment and construction constraints、operation constraints、satisfaction constraints and integrated demand response constraints are considered,and the genetic algorithm is used to solve the model.Then,taking the integrated energy system composed of IEEE14 bus distribution system and 11 bus natural gas system as an example,the model is simulated and analyzed.The simulation results show that the model can effectively reduce the load peak valley difference,improve power distribution,reduce energy waste and reduce the total planning cost of distribution network companies.(3)A distribution network planning method considering the uncertainty of user participation demand response is proposed to improve the rationality of the planning and the economy of the planning scheme.Firstly,the uncertainty model of demand response is established,including price type demand response uncertainty model and incentive demand response uncertainty model.Secondly,based on the chance constrained programming theory,the demand response is modeled by fuzzy chance,and then transformed into a clear equivalent class form to solve.Finally,taking the minimum annual comprehensive cost of distribution network company as the objective function,including annual value construction cost of grid structure,annual network loss cost,annual power purchase cost and execution demand response cost,an optimization model is established to realize economic operation,and genetic algorithm is used to solve the model.Taking IEEE54 bus distribution network as an example,the simulation verification analysis is carried out to provide reference for planning and construction of distribution companies and other relevant departments.