MATLAB Implementation of Combined Economic and Emission Dispatch Problem by Metaheuristic algorithm

Economic Load Dispatch (ELD) is the process of allocating the required load between the available generation units such that the cost of operation is minimized. The ELD problem is formulated as a nonlinearly constrained optimization problem with both equality and inequality constraints. The dual-objective Combined Economic Emission Dispatch (CEED) problem is considering the environmental impacts that accumulated from the emission of gaseous pollutants of fossil-fuelled power plants. In this work, a MATLAB implementation of Meta-Heuristic Optimization to solve ELD and CEED problems in power systems is discussed. Results obtained by the Meta-Heuristic Optimization are compared with each other ten generating model considering valve point effect in terms of total cost and computational time.

## MATLAB Implementation of Solving Combined Economic and Emission Dispatch by Metaheuristic Algorithm

### 1. Introduction

In the power generation industry, ensuring economic and efficient operation while minimizing environmental impact is of utmost importance. The Combined Economic and Emission Dispatch (CEED) problem involves optimizing the power generation scheduling to achieve the dual objectives of economic efficiency and emission reduction. Solving this complex optimization problem requires sophisticated algorithms, and metaheuristic algorithms have emerged as effective tools for such applications. This article explores the implementation of MATLAB for solving CEED using metaheuristic algorithms, specifically Genetic Algorithm (GA), Particle Swarm Optimization (PSO), and Differential Evolution (DE).

### 2. Economic Dispatch and Emission Dispatch

#### 2.1. Economic Dispatch

Economic Dispatch refers to the process of allocating power generation among different units in a power system to meet the demand while minimizing the overall generation cost. The objective is to find the optimal set points for each power generator, considering various constraints such as generator limits, transmission losses, and ramp rates.

#### 2.2. Emission Dispatch

Emission Dispatch, on the other hand, focuses on reducing harmful emissions from power plants, including greenhouse gases and other pollutants. The goal is to find the optimal generation schedule that minimizes emissions while satisfying the demand and operational constraints.

### 3. Combined Economic and Emission Dispatch (CEED)

CEED combines both economic and emission dispatch objectives into a single optimization problem. It aims to achieve a balance between economic efficiency and environmental sustainability. By solving CEED, power system operators can make informed decisions that not only reduce generation costs but also contribute to a cleaner environment.

### 4. Challenges in CEED

The CEED problem is highly complex due to the conflicting nature of economic and emission objectives. As the number of power units and environmental constraints increases, the solution space expands exponentially, making it computationally intensive and time-consuming to find the global optimal solution.

### 5. Metaheuristic Algorithms

Metaheuristic algorithms are optimization techniques inspired by natural processes and heuristics to find approximate solutions for complex problems. These algorithms can efficiently navigate large solution spaces and handle the non-linearity and multi-modality of CEED.

#### 5.1. Genetic Algorithm (GA)

Genetic Algorithm is a population-based metaheuristic algorithm that mimics the process of natural selection and evolution. It maintains a population of potential solutions and applies genetic operators like selection, crossover, and mutation to evolve new generations of solutions.

#### 5.2. Particle Swarm Optimization (PSO)

Particle Swarm Optimization is inspired by the social behavior of birds flocking or fish schooling. Each potential solution is represented as a particle in the search space, and particles collaborate to find the optimal solution by sharing information about their best-known positions.

#### 5.3. Differential Evolution (DE)

Differential Evolution is a population-based algorithm that uses the difference between candidate solutions to explore the search space. It is known for its simplicity and robustness in handling noisy and complex objective functions.

### 6. MATLAB Implementation of CEED using Metaheuristic Algorithms

#### 6.1. Problem Formulation

To implement CEED using metaheuristic algorithms, the problem is formulated with the objective function as a weighted sum of economic cost and emissions. The weights are adjusted to represent the system operator's preferences between economic and environmental concerns.

#### 6.2. Data Input and Processing

The input data, including generator characteristics, demand, and emission factors, are prepared and processed for MATLAB implementation.

#### 6.3. Genetic Algorithm Implementation

The GA implementation involves defining the chromosome representation, genetic operators, fitness function, and population size. The algorithm iteratively evolves the population to find the optimal solution.

#### 6.4. Particle Swarm Optimization Implementation

PSO implementation requires defining the particle representation, updating rules, and the fitness function. The particles collaborate to find the best solution iteratively.

#### 6.5. Differential Evolution Implementation

The DE implementation involves defining the population, mutation strategies, crossover, and the fitness function. DE evolves the population to search for the global optimum.

### 7. Performance Evaluation and Comparison

The MATLAB implementations of GA, PSO, and DE are compared based on their convergence speed, solution quality, and computational efficiency. The algorithm that strikes the best balance between economic and emission objectives is identified.

### 8. Advantages of Metaheuristic Algorithms for CEED

Metaheuristic algorithms offer several advantages for solving CEED, including their ability to find near-optimal solutions in large solution spaces, robustness to handle complex and non-linear functions, and scalability for practical power systems.

### 9. Real-World Applications

The implementation of CEED using metaheuristic algorithms has found applications in various real-world scenarios, including power generation planning, smart grids, and sustainable energy management.

### 10. Conclusion

The MATLAB implementation of Solving Combined Economic and Emission Dispatch by Metaheuristic Algorithms showcases the effectiveness of using GA, PSO, and DE for optimizing power generation schedules. By achieving a balance between economic efficiency and emission reduction, these algorithms offer valuable insights to power system operators to make sustainable decisions.

### 11. FAQs

Q: What is Economic Dispatch? A: Economic Dispatch is the process of optimizing power generation to minimize costs while meeting demand.

Q: How do Metaheuristic Algorithms work? A: Metaheuristic Algorithms use inspiration from natural processes to efficiently search for approximate solutions in complex problem spaces.

Q: What is the objective of Combined Economic and Emission Dispatch (CEED)? A: CEED aims to achieve a balance between economic efficiency and reducing harmful emissions in power generation.

Q: What are the advantages of using Metaheuristic Algorithms for CEED? A: Metaheuristic Algorithms can handle complex power system optimization problems and offer near-optimal solutions in a computationally efficient manner.

Q: How are GA, PSO, and DE compared in the MATLAB implementation? A: GA, PSO, and DE are compared based on their convergence speed, solution quality, and computational efficiency in the MATLAB implementation.