THIS PAPER PRESENTS A NEW METHOD FOR RECONFIGURATION OF THE NETWORK IN A DISTRIBUTION SYSTEM. THIS METHOD WILL FIND WHICH ONE OF TIE LINES SHOULD BE OPENED FIRST TO OBTAIN THE LOWEST LOSS. COMPARING THIS METHOD WITH CONVENTIONAL METHODS SHOWS THAT IF THE TIE LINES ARE OPENED RESPECTIVELY, ONE OF THE ARRANGEMENTS HAS THE LOWEST LOSS. THE PROPOSED METHOD OF THE HIGHEST LOSS REDUCTION WHICH LEADS TO THE MOST IMPROVEMENT IN POWER DELIVERY EFFICIENCY IS TESTED ON A 12.66 KV, 32-BUS DISTRIBUTION SYSTEM. THE COMPARISON OF THE RESULTS OF THE NEW METHOD WITH THE PREVIOUS ONE IS ALSO PRESENTED.

IN PLANNING AND POWER PLANT GENERATION REGULATION DURING PEAK PERIOD OF NATIONAL GRID THE LOSSES DURING THE PEAK HOURS ARE ONE OF THE MOST IMPORTANT FACTOR. SINCE THE LOSSES ARE DIRECTLY RELATED TO THE SQUARED OF TRANSMITTED POWER, THEREFORE, THE POWER LOSSES DURING THE PEAK HOURS REACH TO THEIR MAXIMUM AMOUNTS.THOUGH, CALCULATION OF POWER LOSSES SEEMS TO BE A SIMPLE TASK BUT IF THE REAL AMOUNT OF CONDUCTORS RESISTANCE DO NOT BE TAKEN INTO ACCOUNT IN CALCULATION OF POWER LOSSES, THEN AMOUNT OF POWER LOSSES WOULD NOT BE CALCULATED ACCURATELY AND THAT WOULD LEAD TO WRONG EVALUATION OF LOSSES. SINCE THE DEMAND OR PEAK OF CONSUMPTION OF ELECTRICITY IS CHANGING ALL THE TIME THEN THE CHANGES OF POWER LOSSES ARE A NATURAL CONSEQUENCE OF IT. AS A RESULT THIS QUESTION ARISES THAT:“HOW SHOULD THE PEAK LOAD OR MAX. CONSUMPTION BE MEASURED?”THOUGH THERE ARE SEVERAL EQUIPMENTS FOR MEASURING OF THE ELECTRIC CONSUMPTION DEMAND BUT WITH ALL EQUIPMENT, THE MEASURING OF DEMAND IS CARRIED OUT FOR CERTAIN PERIOD OF TIME IN OTHER WORDS, THE AVERAGE ENERGY IN A KNOWN TIME INTERVAL IS CONSIDERED AS PEAK LOAD. NATURALLY BY PROLONGING THE PERIOD OVER WHICH THE AVERAGE IS TAKEN THE VARIATION OF LOAD WILL BECOME MORE PRONOUNCED AND THE FIGURE WHICH IS ATTRIBUTED TO AS PEAK LOAD WILL BE FAR AWAY FROM THE INSTANTANEOUS PEAK LOAD AND THIS BY ITSELF CAN BE THE CAUSE OF INCREASE OF POWER LOSSES.IN THIS PAPER, THE PEAK LOAD OF AN INDUSTRIAL CUSTOMER IN TEHRAN REGION HAS BEEN MEASURED AT VARIOUS PERIODS OF MEASUREMENT AND THEN ANALYZED. THE RESULTS INDICATE THAT, BY REDUCING THE TIME INTERVAL OF PEAK MEASUREMENT FROM 15 MINUTES DOWN TO TWO MINUTES THE CONSUMPTION DEMAND WILL INCREASE BY 18 PERCENT AND POWER LOSSES BY 42 PERCENT.

VOLTAGE STABILITY ISSUES ARE GROWING CHALLENGES IN MANY MODERN POWER SYSTEMS. THIS PAPER PROPOSES OPTIMIZING THE SIZE AND LOCATION OF STATIC VAR COMPENSATOR (SVC) DEVICES USING SEEKER OPTIMIZATION ALGORITHM (SOA), AS AN EFFECTIVE SOLUTION TO OVERCOME SUCH ISSUES. ALTHOUGH THE PRIMARY PURPOSE OF SVC IS BUS VOLTAGE REGULATION, IT CAN ALSO BE USEFUL FOR VOLTAGE STABILITY ENHANCEMENT AND OR EVEN REAL POWER LOSSES REDUCTION IN THE NETWORK. TO THIS AIM, A MULTI-OBJECTIVE FUNCTION IS PRESENTED WHICH INCLUDES VOLTAGE PROFILE IMPROVEMENT, VOLTAGE STABILITY MARGIN (VSM) ENHANCEMENT AND MINIMIZATION OF ACTIVE POWER LOSSES. VOLTAGE STABILITY IS VERY CLOSE TO REACTIVE POWER DISPATCH (RPD) IN THE NETWORK. THEREFORE, IN ADDITION TO VOLTAGES WITH LOCATIONS OF SVCS, CONSIDERING ALL OF THE OTHER CONTROL VARIABLES INCLUDING EXCITATION SETTINGS OF GENERATORS, TAP POSITIONS OF TAP CHANGING TRANSFORMERS, SIZES OF FIXED CAPACITORS IN THE NETWORK, SIMULTANEOUS RPD AND SVC PLACEMENT WILL BE ACHIEVED. SIMULATION RESULTS ON IEEE 57-BUS TEST SYSTEM, APPLYING GENETIC ALGORITHM (GA), PARTICLE SWARM OPTIMIZATION (PSO) AND SOA, VERIFIES THE EFFICIENCY OF SOA FOR ABOVE CLAIMS.