Analysis of Reactive Power Support of Generators Using Power Flow Tracing Methods

Abstract

With the emergence of competitive electricity power markets, reactive power ancillary services and reactive power markets have attracted attention from researchers and system operators all over the world. Reactive power is an important system support service for secure and reliable operation of power systems. Improper management of reactive power can also hinder the operational efficiency of other power markets. It has been recognized that the reactive power of a generator has several roles, namely, supplying reactive demand, maintaining system security and supporting its real power transmission. It is rational that the minimal reactive power used to support its real power transmission should not receive financial compensation in power markets. Hence, this component of reactive power can be regarded as the minimal reactive power support of a generator. A reactive power optimization model along with a power flow tracing based method is proposed in this article to tackle this problem. The validity and rationality of the approach are verified using a simple meshed 5-bus system.

Joint Modeling Analysis of Production and Operation Indicators for Power Grid Enterprises

“…2) Based on the initial values of each parameter in step 1, construct matrices M and E according to equations ( 7) and ( 8), and extract missing samples from the conditional distribution according to equation (6).…”

“…From the perspective of challenges, after the comprehensive purchase and sale of electricity during the same period, the volatility of electricity and line loss indicators has increased, making traditional "step by step" control difficult to sustain. It is necessary to optimize core indicator control [6] , continue to carry out loss reduction management [7] , do a good job in electricity purchase and sale management, play a role in data empowerment [8] , and improve platform support capabilities.…”

Effect of the approximation of voltage angle difference on the OPF algorithms in the power network

“…Reason for rise in reactive power generation for these two buses can be explained from Eqn. (16) [28][29] which states that generation is directly proportional to angle differences.…”

“…4 and Table. 16) [28][29] which states that generation is directly proportional to angle differences.…”

Cost‐based allocation model for hybrid power system considering solar, wind and thermal generations separately

“…The major objectives of power flow tracing-based approach are to trace the overall power flow with transmission line losses over the system. The basic concept of tracing the power has been given by Bialek [1], employing upstream and downstream algorithm to trace the power inputs and outputs, which has been further explored in [2], and an inverted upstream and downstream algorithm matrix calculation has been introduced in [3]. However, there is no need to calculate matrices for upstream and downstream distribution [4], which leads to faster computation.…”