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Technical Seminar Report On “CONTINGENCY ANALYSIS” under the guidance of Mr. Debasis Jena

Technical Seminar Report On “CONTINGENCY ANALYSIS” under the guidance of Mr. Debasis Jena submitted by SIGMA DASH EE200198046. INTRODUCTION. Simulator that evaluates, provides and prioritizes the impacts on an electric power system.

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Technical Seminar Report On “CONTINGENCY ANALYSIS” under the guidance of Mr. Debasis Jena

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  1. Technical Seminar Report On “CONTINGENCY ANALYSIS” under the guidance of Mr. Debasis Jena submitted by SIGMA DASH EE200198046

  2. INTRODUCTION • Simulator that evaluates, provides and prioritizes the impacts on an electric power system • AC power flow method is expensive, computationallyand time taking. • DC power flow equations and bus voltage equations • Deterministic contingency analysis • The algo in CA uses network parameters to model, calculate & simulate the effects of removing equipment from the power system.

  3. DC POWER FLOW METHOD • N-1 in number, only the real power flow , all line resistances are neglected • Line resistance is neglectedso Y ij= Gij + jBij = jBij

  4. must be sufficiently small Ultimately, or in matrix form P = K If Phas to be constant, K &  will change from base values This provides the changes in the bus voltage angles  = - (K0)-1 Ks

  5. To study single contingencies, we use  Kpp= Kpq Kqq = Kpq  Kpq = - Kpq  Kqp= - Kqp Substituting these we get the matrix as = - (K0)-1 ( psKp+  psKq) pq Changes in line flows due to the loss of line pq given are obtained by substituting the appropriate elements ofpq

  6. Z MATRIX METHOD • Methods include inverting Y bus matrix and injecting a fictitious current into the bus • Converting the MVA loads to impedance loads using • Zload i = • Injecting a unit current, into the bus p which has to be removed =

  7. Ipqcan be calculated using the equation • An adjustment parameter, d, has to be used • Due to the injection lp = d, the new current in other elements Ipq where ij is not equal to mn

  8. The sought-after current flow changes due to removing line pq are for all ij • Calculating the current flow pattern in the modified network, in which line pq has been removed, requires only that we inject current I p=d, as before, into the modified network. • The voltages are =

  9. POST CONTINGENCY EQUILLIBRIUM Methods to compute the equilibrium condition immediately following a disturbance to an electric power system • Analysis by Integration • Analysis by Simultaneous Iteration • Analysis by partitioned iteration

  10. CONCLUSION • Methods for evaluating both isolated and interconnectedareas • Used as an online decision support tool • Faster approximate methods for locating potential trouble spots

  11. THANK YOU !

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