Harmonic Compensation By Pv Statcom Essay

866 words - 4 pages

For emolument of current harmonics (if any), the instantaneous resoluteness of different active and reactive powers is utilized - the active and reactive powers are computed utilizing p-q theory. No restrictions are imposed on the voltage or current wave forms, and it can be applied to three-phase systems with or without a neutral wire for three-phase generic voltage and current wave forms. Thus, it is valid not only in steady state, but withal in transient states.

The p-q Theory first transforms voltages and currents from the a-b-c to α-β-o coordinates, and then defines instantaneous power on these coordinates. Hence, this theory always considers the three-phase system as a unit, not a ...view middle of the document...

28) & (4.29),P ̅_L, and q ̅_L, represent the DC components, which are responsible for fundamental load active and reactive powers. P ̃_L, and q ̃_L represent the AC components which are responsible for harmonic powers.
For load current harmonic compensation, the solar farm inverter should supply the harmonic part of the load current. That is, the reference current signal generation should be based on terms P ̃_L, and q ̃_L. Furthermore, P ̃_L and q ̃_L. can be respectively split into two parts (2ω components and harmonic components) as:

P ̃_L= P_L2ω+P_Lh
q ̃_L= q_L2ω+q_Lh

Where P_L2ωand q_L2ωare the negative active and reactive power (2ω components) originated from asymmetrical fundamental (negative sequence) component of the load current, and P_Lhand q_Lh are the harmonic active and reactive power (harmonic components) of the load current. P ̅_L , q ̅_L and P ̃_L , q ̃_L or P_L2ω, q_L2ωand P_Lh , q_Lh can be extracted by means of low-pass or band-pass Butterworth analog filters. The commands of three-phase compensating currents injected byPV-STATCOM in the α-β coordinates, ico *, icα *, icβ* can be calculated by the following equation:

[█(i_α^*@i_β^* )]=[■(V_α&V_β@V_β&-V_α )][█(-P^*@-q^* )]
Where P^* and q^*are the power components of active and reactive powers to be compensated by the PV-STATCOM. And the reason for including minus signals in the...

Find Another Essay On Harmonic Compensation by PV-STATCOM

Renewable Energy Resources: Solar Energy Essay

2194 words - 9 pages proposed boost inverter and by using FFT analysis, the THD value is obtained as 11.58%. Fig.8 Waveform of Output Voltage and Voltage across Capacitor System Types Output voltage (Volts) Power (Watts) Open Loop System 60V 186W Fuzzy Logic Controller Method 66V 252W Fig.9 Total Harmonic Distortion Simulation of PV Interfaced Proposed Inverter with Fuzzy Logic Controller Method Fig.10 shows the PV interfaced boost inverter with fuzzy logic

Voltage Limits and Currents on Power Systems

2596 words - 11 pages sinusoidal nature of voltage and currents in the power system. Various international agencies like IEEE and IEC have issued standards, which put limits on various current and voltage harmonics. The limits for various current and voltage harmonics specified by IEEE-519 for various frequencies are given in Table 2.1 and Table 2.2. Table 2.1 IEEE 519 Voltage Limits Bus Voltage Minimum Individual Harmonic Components (%) Maximum THD (%) 69 kV and

Non-Linear Load Leads to the Power Quality

702 words - 3 pages To sustain the modern civilization, all applications which is made by the increased use of modern electronics switches, and rapid growth of industries in which uses loads which is purely non-linear load leads to the power quality disturbance in to the utility system which leads to presence of harmonics in the power grid. When the harmonic currents flow in the power Grid, they can instigate problems such as Voltage distortion, PF correction

Design and Evaluation of DSP Based Differential Relay of Power Transformer

2409 words - 10 pages recognition, wavelet transformer, harmonic analysis… In this paper, we propose an algorithm for digital differential relay based on the detection of the second harmonic component to discriminate between the false differential current at the energizing moment of power transformer and that causing by a real internal fault. The first part of the paper is devoted to the description of the traditional differential relays, the DSP (Digital Signal

Portman Hotel and the management of change

1289 words - 5 pages instance.A client should only have contacts with one PV, at least during the day.Increase the role of middle management:Empower supervisorsImplement an evolution grid within the PV hierarchy should be settled and motivation should be aroused by a competitive compensation policy or through new responsibilitiesManagement should be much more personalized to be aware of PVs problems and more reactiveStakeholders' opinionPVsJob more rewarding in terms of

Business Management Finance /Time Value Money Paper

833 words - 3 pages period it is common to use these different interest rate estimates for the future time periods. An investment over a two year period would then have PV(Present Value) ofFuture ValueFuture Value is the amount of money that an investment made today (the present value) will grow to by some future date. Since money has time value, we expect the future value to be greater than the present value. The difference between the two depends on the number of

Evolutionary Programming Technique for Voltage Control

3081 words - 13 pages shunt compensation. The examples of common forms of reactive power compensation are shunt reactor and capacitor banks, series capacitor banks, and static VAR compensators. Besides that, under-load transformer tap changer setting and power scheduling also provide voltage and reactive power control in the power system. Reference [15] investigates a new potential application of coordinated secondary voltage control by multiple FACTS voltage controllers

Theoretical Basis for Measuring Social Costs

2625 words - 11 pages provides an indirect utility function, v (p, q, y) ≡ v [x_j (p, q, y), q]. Suppose changes in environmental quality (q^0 to 〖 q〗^1) and utility u^0≡v (p,q^0,y) to 〖 u〗^1≡ v (p,〖 q〗^1,y). If this change is an improvement in environmental quality, 〖 u〗^1> u^0. If this change is an decrease in environmental quality, 〖 u〗^1< u^0. The compensation surplus and equivalent surplus (CS and ES) measures of changes in environmental quality are defined by

Role of Spirituality in Enhancing Quality of Life in Women with HIV in Cambodia

1788 words - 7 pages people’s interest in the study, including illiterate patients. I read, speak, and write Khmer at the intermediate level. Once signed informed consent is obtained, they will be enrolled into the study. The selected interview will be done on site or their home as preferred by participants. Upon completion of the interview, $5-valued compensation will be offered. D. Indicators Data will be obtained during each interviewer-administered survey and

Business

1302 words - 5 pages the decrease in the manager¡¯s income. As above, in making decisions, managers would make trade off among three constituencies. They would not try to maximize shareholder value only. Consequently, the conflicts between the parties occur.b. (i) Monitoring by financial institutions. Bank debt is widely held, it can eliminate the free-rider problems especially in reducing the free-rider problem with respect to monitoring the firm

The report on the investment of the bond---taking a example of Generator Notes(GNA)

2283 words - 9 pages of the GNA bond is =8.59%.B. the present value of the coupons can be calculated by following equation:Then, applying =8.59% into the equation, we can get the present value of the coupons isThus the PV of coupon payments is $16.38C. the present value of the face value returned at maturity can be calculated below:Then, take the =8.59% into the equation, we can get the present value of the face value returned at maturity asThus the PV of the par is

Similar Essays

Harmonic Reduction Using Pv Statcom Essay

1009 words - 5 pages kilo-watt PV solar system is connected at the point of common connection (PCC) of the distribution network model. To study the dynamic behaviour the detailed model of the conventional model of PV solar system is modelled in PSCAD/EMTDC by using the system parameters as given in paper 5. Proposed PV-STATCOM Control System for Harmonic Compensation The p-q theory is utilized to compute the instantaneous resoluteness of different active and reactive

Pv Statcom And Total Harmonic Distotion Analysis

2049 words - 8 pages study and THD reduction by PV-STATCOM A case study of harmonic evaluation is performed by employing an electrical load distribution model with and without PV-STATCOM in PSCAD. The distribution model consists of 10 PC, 3 CFL lamps, 5 Fluorescent lamps, Battery Charger, Arc Furnace, ASD and Lift Motor. The Phase-A supply and rms currents are additionally simulated. Both the current wave forms are distorted due to the presents of harmonic and are in

Internet Role In Music Essay

591 words - 2 pages output. There are several power conditioners, which by themselves contribute to power degradation due to switching of the power semiconductor devices and harmonic effects generated in the converters. Thu, filters are used to reduce the harmonics but are of low efficient way. FACTS controllers are widely used to improve not only the power quality, but also provide dynamic control of the power transfer parameters of transmission voltage, line

Internet Role In Music Essay

591 words - 2 pages output. There are several power conditioners, which by themselves contribute to power degradation due to switching of the power semiconductor devices and harmonic effects generated in the converters. Thu, filters are used to reduce the harmonics but are of low efficient way. FACTS controllers are widely used to improve not only the power quality, but also provide dynamic control of the power transfer parameters of transmission voltage, line