Reliability of power systems define the utility’s capability to minimize outage frequency and duration. For regulatory purposes, power system reliability indices are evaluated for performance based regulation (PBR). In the Philippines three performance indicators on system reliability are among the indices evaluated to assess transmission and distribution electric systems for regulatory years involved. System Average [...]
Archive for the ‘Power System Analysis’ Category
4 Oct
Demand-Side Management Practices
The electric power system as driven by economic market forces experiences intensive utilization. To keep electric power systems continue to operate in a reliable and secured manner, resources aside from power generation are needed. Demand-side management has been taking its place in supporting power system operations and planning in the deregulated era. Significant reliability [...]
18 Sep
Power Factor Planning for Wind Power Interconnection
When interconnecting wind power generation in a power system, planners interconnect a “negative” load. Wind power generation normally utilize induction generators which are capable of producing real power (watts) but not reactive power (vars) in contrast with synchronous generators.
In this case, reactive power support is needed for wind power generation to supply power to the [...]
9 Sep
Less Transmission Capacity equals High Electricity Market Prices
Recent postings of Wholesale Electricity Spot Market (WESM) electricity spot prices showed remarkable increases due to the damage of one 600MVA 500kV/230kV transformer at San Jose substation in Bulacan. The damage 600MVA transformer is one of four 600MVA 500kV/230kV power transformers in the power substation. The San Jose 500kV substation delivers power generation from [...]
26 Aug
Technical Performance of an Electric Cooperative supplied with Wind Power
Wind power supply has further implications on system reliability because of its variability and can impact power quality in its nature of power production since it uses power electronics for power control that can produce harmonics and with its variability which can result to unacceptable voltage variations and voltage flickers. Ilocos Norte Electric Cooperative [...]
25 Aug
Simple Method for Selecting Overhead Distribution Line Conductor
Distribution Utilities (DUs) when planning for their distribution system, are faced with various options and constraints. One of the DUs’ process in system planning is choosing the right size of overhead distribution conductor for a given load, voltage level and expected load growth just to name a few. Most of the time, DUs have a [...]
20 Aug
Benefits of System Loss Reduction
Aside from impacting or not impacting electricity rates, system loss reduction has the following benefits:
Reduction of fuel emissions due to lesser use of fossil-fuel generating plants – this has societal impact as it cover environmental concerns.
Utility system capacity savings – decrease in losses provides released extra capacity for the distribution lines and transformers.
Promotion of [...]
13 Aug
What Happened Here?
Historically, Metro Manila carries a whopping 50 to 60 percent of the total load of the Luzon Grid in the Philippines. Five bulk power substations deliver power to the metropolitan, if a disruption in the transmission lines connecting the load center to any of these substations, a power blackout is imminent in the area. And [...]
7 Aug
Comments on the Enforcement of Reliability and Power Quality Standards, and Quality Reliability Index (QRI) for Distribution Utilities
In 2006, I made significant technical comments on the issues of reliability and quality of electric power supply being delivered by Distribution Utilities in the Philippines. Energy Regulatory Commission (ERC) provides the link Work in Progress for the said issues.
The complete documents of comments from various entities can be accessed here – ERC Reliability and [...]
7 Aug
Philippine Energy and Power Independence thru Wind Power
The Philippines in 2007 had installed power generation capacity of about 16,000 MW scattered around the archipelago. Of the various energy sources, renewable energy which were wind and solar accounted for 0.16% of the total capacity. Natural Gas provided a decent 17.78% contribution to the electric power demand. Most of these Natural Gas generation are [...]
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